Imported from libpng-1.2.6beta1.tar

ANNOUNCE

@@ -1,37 +1,47 @@
 
-Libpng 1.0.9beta3 - November 23, 2000
+Libpng 1.2.6beta1 - October 22, 2002
 
-This is a public release of libpng, intended for use in production codes.
+This is not intended to be a public release.  It will be replaced
+within a few weeks by a public version or by another test version.
 
-Changes since the last public release (1.0.8):
+Changes since the last public release (1.2.4):
 
-  Fixed typo in scripts/makefile.hpux
-  Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser)
-  Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser)
-  Changed "cdrom.com" in documentation to "libpng.org"
-  Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg).
-  Changed type of "params" from voidp to png_voidp in png_read|write_png().
-  Added MNG_EXTENSIONS_SUPPORTED macro and support for some proposed MNG
-     features, for testing purposes.
-  Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h.
-  Revised the 3 instances of WRITEFILE in pngtest.c.
-  Updated png.rc in dll/msvc project
-  Revised makefile.dec to define and use LIBPATH and INCPATH
-  Increased size of global png_libpng_ver[] array from 12 to 18 chars.
-  Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const.
-  Removed duplicate png_crc_finish() from png_handle_bKGD() function.
-  Added a warning when application calls png_read_update_info() multiple times.
-  Revised makefile.cygwin
-  Fixed bugs in iCCP support in pngrutil.c and pngwutil.c.
-  Replaced png_set_empty_plte_permitted() with png_permit_mng_features().
-  Relocated "msvc" and "wince" project subdirectories into "projects"
-    subdirectory and added projects/borland project subdirectory.
-  Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate.
-  Add error message in png_set_compression_buffer_size() when malloc fails.
-  Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project.
-  Ifdef'ed out the png_flush() in pngwrite.c that crashes some applications
-    that don't set png_output_flush_fn.
-  Added makefile.macosx and makefile.aix to scripts directory.
+version 1.2.4patch01 [July 20, 2002]
+  Revised makefile.cygwin to use DLL number 12 instead of 13.
+version 1.2.5beta1 [August 6, 2002]
+  Added code to contrib/gregbook/readpng2.c to ignore unused chunks.
+  Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11)
+  Removed some stray *.o files from contrib/gregbook.
+  Changed png_error() to png_warning() about "Too much data" in pngpread.c
+    and about "Extra compressed data" in pngrutil.c.
+  Prevent png_ptr->pass from exceeding 7 in png_push_finish_row().
+  Updated makefile.hggcc
+  Updated png.c and pnggccrd.c handling of return from png_mmx_support()
+version 1.2.5beta2 [August 15, 2002]
+  Only issue png_warning() about "Too much data" in pngpread.c when avail_in
+    is nonzero.
+  Updated makefiles to install a separate libpng.so.3 with its own rpath.
+version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002]
+  Revised makefiles to not remove previous minor versions of shared libraries.
+version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002]
+  Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared
+    library loader directive.
+  Added missing "$OBJSDLL" line to makefile.gcmmx.
+  Added missing "; fi" to makefile.32sunu.
+version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002]
+  Revised libpng-config script.
+version 1.2.5 and 1.0.15 [October 3, 2002]
+  Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux,
+    and makefile.aix.
+  Relocated two misplaced PNGAPI lines in pngtest.c
+version 1.2.6beta1 [October 22, 2002]
+  Commented out warning about uninitialized mmx_support in pnggccrd.c.
+  Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h.
+  Added missing backslashes in makefile.dec.
+  Fixed install-shared target dependency in makefile.32sunu.
+  Revised makefile.dec, makefile.macosx, makefile.aix, makefile sg*,
+    makefile.hp*, makefile.beos, makefile.*sunu (only affecting LDFLAGS
+    used in running pngtest).
 
 Send comments/corrections/commendations to
 png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu

CHANGES

@@ -1,3 +1,4 @@
+
 CHANGES - changes for libpng
 
 version 0.2
@@ -732,10 +733,11 @@ version 1.0.6j [May 3, 2000]
 version 1.0.7beta11 [May 7, 2000]
   Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
     which are no longer used.
-  Eliminated the three new members of png_text when PNG_NO_iTXt_SUPPORTED
-    or PNG_LEGACY_SUPPORTED is defined.
-  Made PNG_NO_ITXT_SUPPORTED the default setting, to avoid memory overrun
-    when old applications fill the info_ptr->text structure directly.
+  Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is
+    defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXT_SUPPORTED
+    is defined.
+  Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory
+    overrun when old applications fill the info_ptr->text structure directly.
   Added PNGAPI macro, and added it to the definitions of all exported functions.
   Relocated version macro definitions ahead of the includes of zlib.h and
     pngconf.h in png.h.
@@ -798,7 +800,6 @@ version 1.0.7rc2 [June 28, 2000]
   Fixed "DJBPP" typo in pnggccrd.c introduced in beta18.
 version 1.0.7 [July 1, 2000]
   Revised the definition of "trans_values" in libpng.3/libpng.txt
-version 1.0.9beta3 [November 23, 2000]
 version 1.0.8beta1 [July 8, 2000]
   Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks.
   Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and
@@ -850,9 +851,340 @@ version 1.0.9beta2 [November 19, 2000]
   Add error message in png_set_compression_buffer_size() when malloc fails.
 version 1.0.9beta3 [November 23, 2000]
   Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project.
-  Ifdef'ed out the png_flush() in pngwrite.c that crashes some applications
+  Removed the png_flush() in pngwrite.c that crashes some applications
     that don't set png_output_flush_fn.
   Added makefile.macosx and makefile.aix to scripts directory.
+version 1.0.9beta4 [December 1, 2000]
+  Change png_chunk_warning to png_warning in png_check_keyword().
+  Increased the first part of msg buffer from 16 to 18 in png_chunk_error().
+version 1.0.9beta5 [December 15, 2000]
+  Added support for filter method 64 (for PNG datastreams embedded in MNG).
+version 1.0.9beta6 [December 18, 2000]
+  Revised png_set_filter() to accept filter method 64 when appropriate.
+  Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to
+    help prevent applications from using MNG features in PNG datastreams.
+  Added png_permit_mng_features() function.
+  Revised libpng.3/libpng.txt.  Changed "filter type" to "filter method".
+version 1.0.9rc1 [December 23, 2000]
+  Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c
+  Fixed error handling of unknown compression type in png_decompress_chunk().
+  In pngconf.h, define __cdecl when _MSC_VER is defined.
+version 1.0.9beta7 [December 28, 2000]
+  Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places.
+  Revised memory management in png_set_hIST and png_handle_hIST in a backward
+    compatible manner.  PLTE and tRNS were revised similarly.
+  Revised the iCCP chunk reader to ignore trailing garbage.
+version 1.0.9beta8 [January 12, 2001]
+  Moved pngasmrd.h into pngconf.h.
+  Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop.
+version 1.0.9beta9 [January 15, 2001]
+  Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to
+    wince and msvc project module definition files.
+  Minor revision of makefile.cygwin.
+  Fixed bug with progressive reading of narrow interlaced images in pngpread.c
+version 1.0.9beta10 [January 16, 2001]
+  Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined.
+  Fixed "png_mmx_supported" typo in project definition files.
+version 1.0.9beta11 [January 19, 2001]
+  Updated makefile.sgi to make shared library.
+  Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED
+    by default, for the benefit of DLL forward compatibility.  These will
+    be re-enabled in version 1.2.0.
+version 1.0.9rc2 [January 22, 2001]
+  Revised cygwin support.
+version 1.0.9 [January 31, 2001]
+  Added check of cygwin's ALL_STATIC in pngconf.h
+  Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos.
+version 1.0.10beta1 [March 14, 2001]
+  Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc.
+  Reformatted libpng.3 to eliminate bad line breaks.
+  Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c
+  Added prototype for png_mmx_support() near the top of pnggccrd.c
+  Moved some error checking from png_handle_IHDR to png_set_IHDR.
+  Added PNG_NO_READ_SUPPORTED and PNG_NO_WRITE_SUPPORTED macros.
+  Revised png_mmx_support() function in pnggccrd.c
+  Restored version 1.0.8 PNG_WRITE_EMPTY_PLTE_SUPPORTED behavior in pngwutil.c
+  Fixed memory leak in contrib/visupng/PngFile.c
+  Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version)
+  Added warnings when retrieving or setting gamma=0.
+  Increased the first part of msg buffer from 16 to 18 in png_chunk_warning().
+version 1.0.10rc1 [March 23, 2001]
+  Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy,
+    and png_strlen.
+  Revised png_mmx_supported() function in pnggccrd.c to return proper value.
+  Fixed bug in progressive reading (pngpread.c) with small images (height < 8).
+version 1.0.10 [March 30, 2001]
+  Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin
+  Added beos project files (Chris Herborth)
+version 1.0.11beta1 [April 3, 2001]
+  Added type casts on several png_malloc() calls (Dimitri Papadapoulos).
+  Removed a no-longer needed AIX work-around from pngconf.h
+  Changed several "//" single-line comments to C-style in pnggccrd.c
+version 1.0.11beta2 [April 11, 2001]
+  Removed PNGAPI from several functions whose prototypes did not have PNGAPI.
+  Updated scripts/pngos2.def
+version 1.0.11beta3 [April 14, 2001]
+  Added checking the results of many instances of png_malloc() for NULL
+version 1.0.11beta4 [April 20, 2001]
+  Undid the changes from version 1.0.11beta3.  Added a check for NULL return
+    from user's malloc_fn().
+  Removed some useless type casts of the NULL pointer.
+  Added makefile.netbsd
+version 1.0.11 [April 27, 2001]
+  Revised makefile.netbsd
+version 1.0.12beta1 [May 14, 2001]
+  Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot)
+  Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h
+  Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings.
+  Eliminated the png_error about apps using png_read|write_init().  Instead,
+    libpng will reallocate the png_struct and info_struct if they are too small.
+    This retains future binary compatibility for old applications written for
+    libpng-0.88 and earlier.
+version 1.2.0beta1 [May 6, 2001]
+  Bumped DLLNUM to 2.
+  Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED
+    by default.
+  Added runtime selection of MMX features.
+  Added png_set_strip_error_numbers function and related macros.
+version 1.2.0beta2 [May 7, 2001]
+  Finished merging 1.2.0beta1 with version 1.0.11
+  Added a check for attempts to read or write PLTE in grayscale PNG datastreams.
+version 1.2.0beta3 [May 17, 2001]
+  Enabled user memory function by default.
+  Modified png_create_struct so it passes user mem_ptr to user memory allocator.
+  Increased png_mng_features flag from png_byte to png_uint_32.
+  Bumped shared-library (so-number) and dll-number to 3.
+version 1.2.0beta4 [June 23, 2001]
+  Check for missing profile length field in iCCP chunk and free chunk_data
+     in case of truncated iCCP chunk.
+  Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc
+  Bumped dll-number from 2 to 3 in makefile.cygwin
+  Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly
+     if user attempts to run it on an 8-bit display.
+  Updated contrib/gregbook
+  Use png_malloc instead of png_zalloc to allocate palette in pngset.c
+  Updated makefile.ibmc
+  Added some typecasts to eliminate gcc 3.0 warnings.  Changed prototypes
+     of png_write_oFFS width and height from png_uint_32 to png_int_32.
+  Updated example.c
+  Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c
+version 1.2.0beta5 [August 8, 2001]
+  Revised contrib/gregbook
+  Revised makefile.gcmmx
+  Revised pnggccrd.c to conditionally compile some thread-unsafe code only
+     when PNG_THREAD_UNSAFE_OK is defined.
+  Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with
+     value exceeding 2^bit_depth-1
+  Revised makefile.sgi and makefile.sggcc
+  Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c
+  Removed restriction that do_invert_mono only operate on 1-bit opaque files
+version 1.2.0 [September 1, 2001]
+  Changed a png_warning() to png_debug() in pnggccrd.c
+  Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC().
+version 1.2.1beta1 [October 19, 2001]
+  Revised makefile.std in contrib/pngminus
+  Include background_1 in png_struct regardless of gamma support.
+  Revised makefile.netbsd and makefile.macosx, added makefile.darwin.
+  Revised example.c to provide more details about using row_callback().
+version 1.2.1beta2 [October 25, 2001]
+  Added type cast to each NULL appearing in a function call, except for
+    WINCE functions.
+  Added makefile.so9.
+version 1.2.1beta3 [October 27, 2001]
+  Removed type casts from all NULLs.
+  Simplified png_create_struct_2().
+version 1.2.1beta4 [November 7, 2001]
+  Revised png_create_info_struct() and png_creat_struct_2().
+  Added error message if png_write_info() was omitted.
+  Type cast NULLs appearing in function calls when _NO_PROTO or
+    PNG_TYPECAST_NULL is defined.
+version 1.2.1rc1 [November 24, 2001]
+  Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL
+    is defined.
+  Changed typecast of "size" argument to png_size_t in pngmem.c calls to
+    the user malloc_fn, to agree with the prototype in png.h
+  Added a pop/push operation to pnggccrd.c, to preserve Eflag (Maxim Sobolev)
+  Updated makefile.sgi to recognize LIBPATH and INCPATH.
+  Updated various makefiles so "make clean" does not remove previous major
+    version of the shared library.
+version 1.2.1rc2 [December 4, 2001]
+  Always allocate 256-entry internal palette, hist, and trans arrays, to
+    avoid out-of-bounds memory reference caused by invalid PNG datastreams.
+  Added a check for prefix_length > data_length in iCCP chunk handler.
+version 1.2.1 [December 7, 2001]
+  None.
+version 1.2.2beta1 [February 22, 2002]
+  Fixed a bug with reading the length of iCCP profiles (Larry Reeves).
+  Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate
+    libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h
+  Revised makefile.darwin to remove "-undefined suppress" option.
+  Added checks for gamma and chromaticity values over 21474.83, which exceed
+    the limit for PNG unsigned 32-bit integers when encoded.
+  Revised calls to png_create_read_struct() and png_create_write_struct()
+    for simpler debugging.
+  Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK)
+version 1.2.2beta2 [February 23, 2002]
+  Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths.
+  Check for invalid image dimensions in png_get_IHDR.
+  Added missing "fi;" in the install target of the SGI makefiles.
+  Added install-static to all makefiles that make shared libraries.
+  Always do gamma compensation when image is partially transparent.
+version 1.2.2beta3 [March 7, 2002]
+  Compute background.gray and background_1.gray even when color_type is RGB
+    in case image gets reduced to gray later.
+  Modified shared-library makefiles to install pkgconfig/libpngNN.pc.
+  Export (with PNGAPI) png_zalloc, png_zfree, and png_handle_as_unknown
+  Removed unused png_write_destroy_info prototype from png.h
+  Eliminated incorrect use of width_mmx from pnggccrd.c in pixel_bytes == 8 case
+  Added install-shared target to all makefiles that make shared libraries.
+  Stopped a double free of palette, hist, and trans when not using free_me.
+  Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64.
+version 1.2.2beta4 [March 8, 2002]
+  Compute background.gray and background_1.gray even when color_type is RGB
+    in case image gets reduced to gray later (Jason Summers).
+  Relocated a misplaced /bin/rm in the "install-shared" makefile targets
+  Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library.
+version 1.2.2beta5 [March 26, 2002]
+  Added missing PNGAPI to several function definitions.
+  Check for invalid bit_depth or color_type in png_get_IHDR(), and
+    check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen).
+  Revised iTXt support to accept NULL for lang and lang_key.
+  Compute gamma for color components of background even when color_type is gray.
+  Changed "()" to "{}" in scripts/libpng.pc.in.
+  Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN
+  Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so
+version 1.2.2beta6 [March 31, 2002]
+version 1.0.13beta1 [March 31, 2002]
+  Prevent png_zalloc() from trying to memset memory that it failed to acquire.
+  Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate).
+  Ensure that the right function (user or default) is used to free the
+    png_struct after an error in png_create_read_struct_2().
+version 1.2.2rc1 [April 7, 2002]
+version 1.0.13rc1 [April 7, 2002]
+  Save the ebx register in pnggccrd.c (Sami Farin)
+  Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner).
+  Updated makefiles to put headers in include/libpng and remove old include/*.h.
+version 1.2.2 [April 15, 2002]
+version 1.0.13 [April 15, 2002]
+  Revised description of png_set_filter() in libpng.3/libpng.txt.
+  Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd
+version 1.0.13patch01 [April 17, 2002]
+version 1.2.2patch01 [April 17, 2002]
+  Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and makefile.sggcc
+  Fixed VER -> PNGVER typo in makefile.macosx and added install-static to install
+  Added install: target to makefile.32sunu and makefile.64sunu
+version 1.0.13patch03 [April 18, 2002]
+version 1.2.2patch03 [April 18, 2002]
+  Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng
+  subdirectory to libpngNN subdirectory without the full pathname.
+  Moved generation of libpng.pc from "install" to "all" in 15 makefiles.
+version 1.2.3rc1 [April 28, 2002]
+  Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos).
+  Added $(DESTDIR) feature to 24 makefiles (Tim Mooney)
+  Fixed bug with $prefix, should be $(prefix) in makefile.hpux.
+  Updated cygwin-specific portion of pngconf.h and revised makefile.cygwin
+  Added a link from libpngNN.pc to libpng.pc in 15 makefiles.
+  Added links from include/libpngNN/*.h to include/*.h in 24 makefiles.
+  Revised makefile.darwin to make relative links without full pathname.
+  Added setjmp() at the end of png_create_*_struct_2() in case user forgets
+    to put one in their application.
+  Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and
+    removed them from module definition files.
+version 1.2.3rc2 [May 1, 2002]
+  Fixed bug in reporting number of channels in pngget.c and pngset.c,
+    that was introduced in version 1.2.2beta5.
+  Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(),
+    png_default_flush(), and png_push_fill_buffer() and included them in
+    module definition files.
+  Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles.
+version 1.2.3rc3 [May 1, 2002]
+  Revised prototype for png_default_flush()
+  Remove old libpng.pc and libpngNN.pc before installing new ones.
+version 1.2.3rc4 [May 2, 2002]
+  Typos in *.def files (png_default_read|write -> png_default_read|write_data)
+  In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc
+  Added libpng-config and libpngNN-config and modified makefiles to install them.
+  Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles
+  Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp
+version 1.2.3rc5 [May 11, 2002]
+  Changed "error" and "message" in prototypes to "error_message" and
+    "warning_message" to avoid namespace conflict.
+  Revised 15 makefiles to build libpng-config from libpng-config-*.in
+  Once more restored png_zalloc and png_zfree to regular nonexported form.
+  Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer
+    to nonexported form, but with PNGAPI, and removed them from module def files.
+version 1.2.3rc6 [May 14, 2002]
+  Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c
+  Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp.
+  Removed leftover libpng-config "sed" script from four makefiles.
+  Revised libpng-config creating script in 16 makefiles.
+version 1.2.3 [May 22, 2002]
+  Revised libpng-config target in makefile.cygwin.
+  Removed description of png_set_mem_fn() from documentation.
+  Revised makefile.freebsd.
+  Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR).
+  Revised projects/msvc/README.txt
+  Changed -lpng to -lpngNN in LDFLAGS in several makefiles.
+version 1.2.4beta1 [May 24, 2002]
+  Added libpng.pc and libpng-config to "all:" target in 16 makefiles.
+  Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH)
+  Added missing "\" before closing double quote in makefile.gcmmx.
+  Plugged various memory leaks; added png_malloc_warn() and png_set_text_2()
+    functions.
+version 1.2.4beta2 [June 25, 2002]
+  Plugged memory leak of png_ptr->current_text (Matt Holgate).
+  Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison)
+  Added -soname to the loader flags in makefile.dec, makefile.sgi, and
+    makefile.sggcc.
+  Added "test-installed" target to makefile.linux, makefile.gcmmx,
+    makefile.sgi, and makefile.sggcc.
+version 1.2.4beta3 [June 28, 2002]
+  Plugged memory leak of row_buf in pngtest.c when there is a png_error().
+  Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data.
+  Added "test-installed" target to makefile.32sunu, makefile.64sunu,
+    makefile.beos, makefile.darwin, makefile.dec, makefile.macosx, 
+    makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9.
+version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002]
+  Added "test-installed" target to makefile.cygwin and makefile.sco.
+  Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro.
+version 1.2.4 and 1.0.14 [July 8, 2002]
+  Changed png_warning() to png_error() when width is too large to process.
+version 1.2.4patch01 [July 20, 2002]
+  Revised makefile.cygwin to use DLL number 12 instead of 13.
+version 1.2.5beta1 [August 6, 2002]
+  Added code to contrib/gregbook/readpng2.c to ignore unused chunks.
+  Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11)
+  Removed some stray *.o files from contrib/gregbook.
+  Changed png_error() to png_warning() about "Too much data" in pngpread.c
+    and about "Extra compressed data" in pngrutil.c.
+  Prevent png_ptr->pass from exceeding 7 in png_push_finish_row().
+  Updated makefile.hpgcc
+  Updated png.c and pnggccrd.c handling of return from png_mmx_support()
+version 1.2.5beta2 [August 15, 2002]
+  Only issue png_warning() about "Too much data" in pngpread.c when avail_in
+    is nonzero.
+  Updated makefiles to install a separate libpng.so.3 with its own rpath.
+version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002]
+  Revised makefiles to not remove previous minor versions of shared libraries.
+version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002]
+  Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared
+    library loader directive.
+  Added missing "$OBJSDLL" line to makefile.gcmmx.
+  Added missing "; fi" to makefile.32sunu.
+version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002]
+  Revised libpng-config script.
+version 1.2.5 and 1.0.15 [October 3, 2002]
+  Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux,
+    and makefile.aix.
+  Relocated two misplaced PNGAPI lines in pngtest.c
+version 1.2.6beta1 [October 22, 2002]
+  Commented out warning about uninitialized mmx_support in pnggccrd.c.
+  Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h.
+  Added missing backslashes in makefile.dec.
+  Fixed install-shared target dependency in makefile.32sunu.
+  Revised makefile.dec, makefile.macosx, makefile.aix, makefile sg*,
+    makefile.hp*, makefile.beos, makefile.*sunu (only affecting LDFLAGS
+    used in running pngtest).
 
 Send comments/corrections/commendations to
 png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu

INSTALL

@@ -1,5 +1,5 @@
 
-Installing libpng version 1.0.9beta3 - November 23, 2000
+Installing libpng version 1.2.6beta1 - October 22, 2002
 
 Before installing libpng, you must first install zlib.  zlib
 can usually be found wherever you got libpng.  zlib can be
@@ -10,8 +10,8 @@ zlib.h and zconf.h include files that correspond to the
 version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.0.9beta3" or "lpng109" and "zlib-1.1.3"
-or "zlib113") so that you have directories called "zlib" and "libpng".
+might be called "libpng-1.2.6beta1" or "lpng109" and "zlib-1.1.4"
+or "zlib114") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
 
@@ -28,11 +28,14 @@ Your directory structure should look like this:
              pngsuite
              visupng
           projects
+             beos
              borland
              msvc
-             wince
+             netware.txt
+             wince.txt
           scripts
              makefile.*
+             libpng*.in
           pngtest.png
           etc.
       zlib
@@ -47,9 +50,12 @@ distribution of libpng.  It is available in both tar.gz (UNIX style line
 endings) and zip (DOS style line endings) formats.
 
 If you are building libpng with MSVC, you can enter the libpng\msvc directory
-and follow the instructions in msvc\README.txt.  You can build libpng for
-WindowsCE by entering the libpng\wince directory and following the
-instructions in the README* files.
+and follow the instructions in msvc\README.txt.
+
+You can build libpng for WindowsCE by entering the downloading and installing
+the libpng\wince directory as instructed in the projects\wince.txt file, and
+then following the instructions in the README* files.  Similarly, you can
+build libpng for Netware as instructed in projects\netware.txt.
 
 Else enter the zlib directory and follow the instructions in zlib/README,
 then come back here and choose the appropriate makefile.sys in the scripts
@@ -59,25 +65,34 @@ The files that are presently available in the scripts directory
 include
 
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
- makefile.linux    =>  Linux/ELF makefile (gcc, creates libpng.so.2.1.0.9beta3)
- makefile.gcmmx    =>  Linux/ELF makefile (gcc, creates libpng.so.2.1.0.9beta3,
+ makefile.linux    =>  Linux/ELF makefile (gcc, creates libpng12.so.0.1.2.6beta1)
+ makefile.gcmmx    =>  Linux/ELF makefile (gcc, creates libpng12.so.0.1.2.6beta1,
                        uses assembler code tuned for Intel MMX platform)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
                        ftp://ftp.cs.wisc.edu/ghost)
- makefile.aix      =>  AIX makefile
+ makefile.aix      =>  AIX/gcc makefile
  makefile.cygwin   =>  Cygwin/gcc makefile
+ makefile.darwin   =>  Darwin makefile
  makefile.dec      =>  DEC Alpha UNIX makefile
+ makefile.hpgcc    =>  FreeBSD makefile
+ makefile.hpgcc    =>  HPUX makefile using gcc
  makefile.hpux     =>  HPUX (10.20 and 11.00) makefile
  makefile.ibmc     =>  IBM C/C++ version 3.x for Win32 and OS/2 (static)
  makefile.intel    =>  Intel C/C++ version 4.0 and later
  libpng.icc        =>  Project file for IBM VisualAge/C++ version 4.0 or later
  makefile.macosx   =>  MACOS X Makefile
+ makefile.netbsd   =>  NetBSD/cc makefile, uses PNGGCCRD, makes libpng.so.
+ makefile.ne0bsd  =>  NetBSD/cc makefile, uses PNGGCCRD, makes libpng0.so
+ makefile.openbsd  =>  OpenBSD makefile
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
- makefile.sggcc    =>  Silicon Graphics (gcc, creates libpng.so.2.1.0.9beta3)
+ makefile.sggcc    =>  Silicon Graphics (gcc, creates libpng12.so.0.1.2.6beta1)
  makefile.sunos    =>  Sun makefile
- makefile.solaris  =>  Solaris 2.X makefile (gcc, creates libpng.so.2.1.0.9beta3)
+ makefile.solaris  =>  Solaris 2.X makefile (gcc, creates libpng12.so.0.1.2.6beta1)
+ makefile.so9      =>  Solaris 9 makefile (gcc, creates libpng12.so.0.1.2.6beta1)
+ makefile.32sunu   =>  Sun Ultra 32-bit makefile
+ makefile.64sunu   =>  Sun Ultra 64-bit makefile
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.mips     =>  MIPS makefile
  makefile.acorn    =>  Acorn makefile
@@ -128,6 +143,8 @@ your output with the result shown in contrib/pngsuite/README.
 Most of the makefiles will allow you to run "make install" to
 put the library in its final resting place (if you want to
 do that, run "make install" in the zlib directory first if necessary).
+Some also allow you to run "make test-installed" after you have
+run "make install".
 
 Further information can be found in the README and libpng.txt
 files, in the individual makefiles, in png.h, in the README files in

KNOWNBUG

@@ -1,65 +1,11 @@
 
-Known bugs and suggested enhancements in libpng-1.0.8
+Known bugs in libpng version 1.2.6beta1
 
-0: November 3, 2000 -- BUG -- incorrect iCCP chunk is written
+1. April 22, 2001: pnggccrd.c has been reported to crash on NetBSD when
+   reading interlaced PNG files, when assembler code is enabled but running
+   on a non-MMX i386 platform.
 
-   The compression_type byte in the iCCP chunk written by libpng is
-   usually incorrect.
-
-   Status: Fixed in libpng-1.0.9beta1
-
-1. October 12, 2000 -- BUG -- pngtest fails
-
-   The three WRITEFILE calls in pngtest.c are incorrect.  They must be
-   changed to read
-
-   WRITEFILE((png_FILE_p)png_ptr->io_ptr,  data, length, check);
-   WRITEFILE(io_ptr, near_data, length, check);
-   WRITEFILE(io_ptr, buf, written, err);
-
-2. August 28, 2000 -- BUG -- pnggccrd.c
-
-   The interlacing() function has still not been fully converted and
-   will not compile under gcc-2.95.2; it is currently ifdef'ed out.
-
-   STATUS: Fixed in libpng-1.0.9.  There were also bugs in pngvcrd.c
-   which have been fixed.  The replacement files are available at the
-   PNG web site (http://www.libpng.org/pub/png).
-
-3. March 15, 1998 -- OPTIMIZATION -- Kevin Bracey
-
-   Loops need to be optimized everywhere
-
-   Make them count down instead of up -- Kevin Bracey
-
-   Optimizing compilers don't need this, and making
-   the change would be error prone -- Tom Lane, Glenn R-P
-
-   Question whether i-- or --i is better.
-
-   STATUS: Under investigation, postponed until after
-   libpng-2.0.0.  About 160 loops will be turned around
-   in libpng-2.0.x betaxx, for testing.
-
-4. July 4, 1998 -- ENHANCEMENT -- Glenn R-P
-
-   libpng-1.0.5 and earlier transform colors to gamma=1.0 space for
-   merging with background, and then back to the image's gamma.  The
-   bit_depth of the intermediate (gamma=1.0) representation is probably
-   not sufficient.  In the typical gamma=1/2.2 situation, the linear
-   pixels need about 4 more bits than the gamma-encoded ones, to avoid
-   loss of precision.  A similar situation exists with the rgb_to_gray
-   operation.
-
-   STATUS: under development.
-
-5. September 1999 -- ENHANCEMENT --
-
-   It should be possible to use libpng without floating-point arithmetic.
-
-   STATUS: Under investigation, implementation postponed until after
-   libpng-2.0.0.
-
-   Much of this was completed in libpng-1.0.6, but gamma compensation
-   is not yet done in fixed-point arithmetic.
+   STATUS: Under investigation.  The change to pnggccrd.c in libpng-1.2.1
+   fixed a problem under FreeBSD but not the problem with NetBSD, which
+   still fails as of libpng-1.2.2rc1.
 

LICENSE

@@ -8,8 +8,8 @@ COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.0.7, July 1, 2000, through 1.0.9beta3, November 23, 2000, are
-Copyright (c) 2000 Glenn Randers-Pehrson
+libpng versions 1.0.7, July 1, 2000, through 1.2.6beta1, October 22, 2002, are
+Copyright (c) 2000-2002 Glenn Randers-Pehrson
 and are distributed according to the same disclaimer and license as libpng-1.0.6
 with the following individuals added to the list of Contributing Authors
 
@@ -99,4 +99,4 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 randeg@alum.rpi.edu
-November 23, 2000
+October 22, 2002

README

@@ -1,4 +1,4 @@
-README for libpng 1.0.9beta3 - November 23, 2000 (shared library 2.1)
+README for libpng 1.2.6beta1 - October 22, 2002 (shared library 12.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -172,19 +172,24 @@ Files in this distribution:
        pngsuite     =>  Test images
        visupng      =>  Contains a MSVC workspace for VisualPng
       projects      =>  Contains project files and workspaces for building DLL
+       beos             =>  Contains a Beos workspace for building libpng
        borland          =>  Contains a Borland workspace for building libpng
                             and zlib
        msvc             =>  Contains a Microsoft Visual C++ (MSVC) workspace
                             for building libpng and zlib
-       wince            =>  Contains a Microsoft Visual C++ (Windows CD Toolkit)
-                            workspace for building libpng and zlib on WindowsCE
+       netware.txt      =>  Contains instructions for downloading a set of
+                            project files for building libpng and zlib on
+                            Netware.
+       wince.txt        =>  Contains instructions for downloading a Microsoft
+                            Visual C++ (Windows CD Toolkit) workspace for
+                            building libpng and zlib on WindowsCE
       scripts       =>  Directory containing scripts for building libpng:
        descrip.mms      =>  VMS makefile for MMS or MMK
        makefile.std     =>  Generic UNIX makefile (cc, creates static libpng.a)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng.so.2.1.0.9beta3)
+                            (gcc, creates libpng12.so.0.1.2.6beta1)
        makefile.gcmmx   =>  Linux/ELF makefile (gcc, creates
-                            libpng.so.2.1.0.9beta3, uses assembler code
+                            libpng12.so.0.1.2.6beta1, uses assembler code
                             tuned for Intel MMX platform)
        makefile.gcc     =>  Generic makefile (gcc, creates static libpng.a)
        makefile.knr     =>  Archaic UNIX Makefile that converts files with
@@ -192,17 +197,27 @@ Files in this distribution:
                             ftp://ftp.cs.wisc.edu/ghost)
        makefile.aix     =>  AIX makefile
        makefile.cygwin  =>  Cygwin/gcc makefile
+       makefile.darwin  =>  Darwin makefile
        makefile.dec     =>  DEC Alpha UNIX makefile
+       makefile.freebsd =>  FreeBSD makefile
+       makefile.hpgcc   =>  HPUX makefile using gcc
        makefile.hpux    =>  HPUX (10.20 and 11.00) makefile
        makefile.ibmc    =>  IBM C/C++ version 3.x for Win32 and OS/2 (static)
        makefile.intel   =>  Intel C/C++ version 4.0 and later
        libpng.icc       =>  Project file, IBM VisualAge/C++ 4.0 or later
        makefile.macosx  =>  MACOS X Makefile
+       makefile.netbsd  =>  NetBSD/cc makefile, PNGGCCRD, makes libpng.so.
+       makefile.ne0bsd =>  NetBSD/cc makefile, PNGGCCRD, makes libpng0.so
+       makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
-       makefile.sggcc   =>  Silicon Graphics (gcc, creates libpng.so.2.1.0.9beta3)
+       makefile.sggcc   =>  Silicon Graphics (gcc, creates libpng12.so.0.1.2.6beta1)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng.so.2.1.0.9beta3)
+                            (gcc, creates libpng12.so.0.1.2.6beta1)
+       makefile.so9     =>  Solaris 9 makefile
+                            (gcc, creates libpng12.so.0.1.2.6beta1)
+       makefile.32sunu  =>  Sun Ultra 32-bit makefile
+       makefile.64sunu  =>  Sun Ultra 64-bit makefile
        makefile.sco     =>  For SCO OSr5  ELF and Unixware 7 with Native cc
        makefile.mips    =>  MIPS makefile
        makefile.acorn   =>  Acorn makefile

TODO

@@ -18,3 +18,7 @@ Better filter selection
 Histogram creation.
 Text conversion between different code pages (Latin-1 -> Mac and DOS).
 Should we always malloc 2^bit_depth PLTE/tRNS/hIST entries for safety?
+Build gamma tables using fixed point (and do away with floating point entirely).
+Use greater precision when changing to linear gamma for compositing against
+  background and doing rgb-to-gray transformation.
+Investigate pre-incremented loop counters and other loop constructions.

Y2KINFO

@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      November 23, 2000
+      October 22, 2002
 
       Since the PNG Development group is an ad-hoc body, we can't make
       an official declaration.
 
       This is your unofficial assurance that libpng from version 0.71 and
-      upward through 1.0.9beta3 are Y2K compliant.  It is my belief that earlier
+      upward through 1.2.6beta1 are Y2K compliant.  It is my belief that earlier
       versions were also Y2K compliant.
 
       Libpng only has three year fields.  One is a 2-byte unsigned integer

configure

@@ -1,5 +1,5 @@
 echo "
-  There is no \"configure\" script for Libpng-1.0.9beta3.  Instead, please
+  There is no \"configure\" script for Libpng-1.2.6beta1.  Instead, please
   copy the appropriate makefile for your system from the \"scripts\"
   directory.  Read the INSTALL file for more details.
 "

contrib/gregbook/LICENSE

@@ -1,6 +1,6 @@
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors

contrib/gregbook/Makefile.sgi

@@ -0,0 +1,104 @@
+# Sample makefile for rpng-x / rpng2-x / wpng for SGI using cc and make.
+# Greg Roelofs
+# Last modified:  7 March 2002
+#
+#	The programs built by this makefile are described in the book,
+#	"PNG:  The Definitive Guide," by Greg Roelofs (O'Reilly and
+#	Associates, 1999).  Go buy a copy, eh?  Buy some for friends
+#	and family, too.  (Not that this is a blatant plug or anything.)
+#
+# Invoke this makefile from a shell prompt in the usual way; for example:
+#
+#	make -f Makefile.sgi
+#
+# This makefile assumes libpng and zlib have already been built or downloaded
+# and are both installed in /usr/local/{include,lib} (as indicated by the
+# PNG* and Z* macros below).  Edit as appropriate--choose only ONE each of
+# the PNGINC, PNGLIB, ZINC and ZLIB lines.
+#
+# This makefile builds dynamically linked executables (against libpng and zlib,
+# that is), but that can be changed by uncommenting the appropriate PNGLIB and
+# ZLIB lines.
+
+
+# macros --------------------------------------------------------------------
+
+PNGINC = -I/usr/local/include/libpng12
+PNGLIB = -L/usr/local/lib -lpng12	  # dynamically linked against libpng
+#PNGLIB = /usr/local/lib/libpng12.a # statically linked against libpng
+# or:
+#PNGINC = -I../..
+#PNGLIB = -L../.. -lpng
+#PNGLIB = ../../libpng.a
+
+ZINC = -I/usr/local/include
+ZLIB = -L/usr/local/lib -lz		# dynamically linked against zlib
+#ZLIB = /usr/local/lib/libz.a		# statically linked against zlib
+#ZINC = -I../zlib
+#ZLIB = -L../zlib -lz
+#ZLIB = ../../../zlib/libz.a
+
+XINC = -I/usr/include/X11		# old-style, stock X distributions
+XLIB = -L/usr/lib/X11 -lX11
+#XINC = -I/usr/openwin/include    	# Sun workstations (OpenWindows)
+#XLIB = -L/usr/openwin/lib -lX11
+#XINC = -I/usr/X11R6/include		# new X distributions (XFree86, etc.)
+#XLIB = -L/usr/X11R6/lib -lX11
+
+INCS = $(PNGINC) $(ZINC) $(XINC)
+RLIBS = $(PNGLIB) $(ZLIB) $(XLIB) -lm
+WLIBS = $(PNGLIB) $(ZLIB)
+
+CC = cc
+LD = cc
+RM = rm -f
+# ABI must be the same as that used to build libpng.
+ABI=
+CFLAGS = $(ABI) -O -fullwarn $(INCS)
+LDFLAGS = $(ABI)
+O = .o
+E =
+
+RPNG  = rpng-x
+RPNG2 = rpng2-x
+WPNG  = wpng
+
+ROBJS  = $(RPNG)$(O) readpng$(O)
+ROBJS2 = $(RPNG2)$(O) readpng2$(O)
+WOBJS  = $(WPNG)$(O) writepng$(O)
+
+EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
+
+
+# implicit make rules -------------------------------------------------------
+
+.c$(O):
+	$(CC) -c $(CFLAGS) $<
+
+
+# dependencies --------------------------------------------------------------
+
+all:  $(EXES)
+
+$(RPNG)$(E): $(ROBJS)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBS)
+
+$(RPNG2)$(E): $(ROBJS2)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBS)
+
+$(WPNG)$(E): $(WOBJS)
+	$(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBS)
+
+$(RPNG)$(O):	$(RPNG).c readpng.h
+$(RPNG2)$(O):	$(RPNG2).c readpng2.h
+$(WPNG)$(O):	$(WPNG).c writepng.h
+
+readpng$(O):	readpng.c readpng.h
+readpng2$(O):	readpng2.c readpng2.h
+writepng$(O):	writepng.c writepng.h
+
+
+# maintenance ---------------------------------------------------------------
+
+clean:
+	$(RM) $(EXES) $(ROBJS) $(ROBJS2) $(WOBJS)

contrib/gregbook/Makefile.unx

@@ -1,6 +1,6 @@
 # Sample makefile for rpng-x / rpng2-x / wpng using gcc and make.
 # Greg Roelofs
-# Last modified:  28 February 2000
+# Last modified:  7 March 2002
 #
 #	The programs built by this makefile are described in the book,
 #	"PNG:  The Definitive Guide," by Greg Roelofs (O'Reilly and
@@ -23,24 +23,24 @@
 
 # macros --------------------------------------------------------------------
 
-PNGINC = -I/usr/local/include
-#PNGLIB = -L/usr/local/lib -lpng	# dynamically linked against libpng
-PNGLIB = /usr/local/lib/libpng.a	# statically linked against libpng
+PNGINC = -I/usr/local/include/libpng12
+#PNGLIB = -L/usr/local/lib -lpng12 # dynamically linked against libpng
+PNGLIB = /usr/local/lib/libpng12.a # statically linked against libpng
 # or:
-#PNGINC = -I../..
-#PNGLIB = -L../.. -lpng
-#PNGLIB = ../../libpng.a
+#PNGINC = -I../libpng
+#PNGLIB = -L../libpng -lpng
+#PNGLIB = ../libpng/libpng.a
 
 ZINC = -I/usr/local/include
 #ZLIB = -L/usr/local/lib -lz		# dynamically linked against zlib
 ZLIB = /usr/local/lib/libz.a		# statically linked against zlib
 #ZINC = -I../zlib
 #ZLIB = -L../zlib -lz
-#ZLIB = ../../../zlib/libz.a
+#ZLIB = ../zlib/libz.a
 
-#XINC = -I/usr/include/X11		# old-style, stock X distributions
+#XINC = -I/usr/include			# old-style, stock X distributions
 #XLIB = -L/usr/lib/X11 -lX11
-#XINC = -I/usr/openwin/include    	# Sun workstations (OpenWindows)
+#XINC = -I/usr/openwin/include		# Sun workstations (OpenWindows)
 #XLIB = -L/usr/openwin/lib -lX11
 XINC = -I/usr/X11R6/include		# new X distributions (XFree86, etc.)
 XLIB = -L/usr/X11R6/lib -lX11

contrib/gregbook/Makefile.w32

@@ -32,12 +32,12 @@
 
 # macros --------------------------------------------------------------------
 
-PNGPATH = ../..
+PNGPATH = ../libpng
 PNGINC = -I$(PNGPATH)
 #PNGLIB = $(PNGPATH)/pngdll.lib
 PNGLIB = $(PNGPATH)/libpng.lib
 
-ZPATH = ../../../zlib
+ZPATH = ../zlib
 ZINC = -I$(ZPATH)
 #ZLIB = $(ZPATH)/zlibdll.lib
 ZLIB = $(ZPATH)/zlibstat.lib

contrib/gregbook/README

@@ -16,13 +16,12 @@ of PBMPLUS/NetPBM) and converts them to PNG.
 The source code for all three demo programs currently compiles under
 Unix, OpenVMS, and 32-bit Windows.  (Special thanks to Martin Zinser,
 zinser@decus.de, for making the necessary changes for OpenVMS and for
-providing an appropriate build script.)  Build instructions can be
-found below.
+providing an appropriate build script.)  Build instructions can be found
+below.
 
 Files:
 
    README             this file
-   README.w32         additional Windows-specific information
    LICENSE            terms of distribution and reuse (BSD-like)
 
    Makefile.unx       Unix makefile
@@ -45,26 +44,27 @@ Files:
 
    toucan.png         transparent PNG for testing (by Stefan Schneider)
 
-Note that the programs are designed to be functional, but their primary
-purpose is to demonstrate how to use libpng to add PNG support to other
-programs.  As such, their user interfaces are crude and definitely not
-intended for everyday use.
+Note that, although the programs are designed to be functional, their
+primary purpose is to illustrate how to use libpng to add PNG support to
+other programs.  As such, their user interfaces are crude and definitely
+are not intended for everyday use.
 
-Please see http://www.cdrom.com/pub/png/pngbook.html for further infor-
+Please see http://www.libpng.org/pub/png/pngbook.html for further infor-
 mation and links to the latest version of the source code, and Chapters
 13-15 of the book for detailed discussion of the three programs.
 
 Greg Roelofs
-19 March 2000
+newt@pobox.com
+30 June 2001
 
 
 BUILD INSTRUCTIONS
 
- - Prerequisites:
+ - Prerequisites (in order of compilation):
 
-      - zlib		ftp://ftp.cdrom.com/pub/infozip/zlib/zlib.html
-      - libpng		http://www.cdrom.com/pub/png/pngcode.html
-      - pngbook		http://www.cdrom.com/pub/png/book/sources.html
+      - zlib		http://www.gzip.org/zlib/
+      - libpng		http://www.libpng.org/pub/png/libpng.html
+      - pngbook		http://www.libpng.org/pub/png/book/sources.html
 
      The pngbook demo programs are explicitly designed to demonstrate proper
      coding techniques for using the libpng reference library.  As a result,
@@ -128,11 +128,13 @@ BUILD INSTRUCTIONS
 
      The result should be three executables:  rpng-win.exe, rpng2-win.exe,
      and wpng.exe.  Copy them somewhere in your PATH or run them from the
-     current folder.  Unlike the Unix versions, the two windowed programs
-     (rpng and rpng2) do not display a usage screen when invoked without
-     command-line arguments; see README.w32 for brief help or the book for
-     details.  Note that the programs use the Unix-style "-" character to
-     specify options, instead of the more common DOS/Windows "/" character.
+     current folder.  Like the Unix versions, the two windowed programs
+     (rpng and rpng2) now display a usage screen in a console window when
+     invoked without command-line arguments; this is new behavior as of
+     the June 2001 release.  Note that the programs use the Unix-style "-"
+     character to specify options, instead of the more common DOS/Windows
+     "/" character.  (For example:  "rpng2-win -bgpat 4 foo.png", not
+     "rpng2-win /bgpat 4 foo.png")
 
 
  - OpenVMS:

contrib/gregbook/README.w32

@@ -1,53 +0,0 @@
-See the main README file for basic instructions on compiling and running
-the programs.  See http://www.cdrom.com/pub/png/pngbook.html for further
-information and links to the source code, and Chapters 13-15 of the book
-for detailed discussion of the three programs.
-
-Since the two viewers, rpng and rpng2, are both designed to write infor-
-mation to the console (i.e., a DOS-window command line) while displaying
-the image in a graphical window--and since I haven't yet figured out how
-to do that under Windows--here are the usage screens for the two programs:
-
-
-rpng-win 1.02 of 19 March 2000:  Simple PNG Viewer for Windows
-   Compiled with libpng 1.0.5; using libpng 1.0.5.
-   Compiled with zlib 1.1.3; using zlib 1.1.3.
-
-Usage:  rpng-win [-gamma exp] [-bgcolor bg] file.png
-    exp 	transfer-function exponent (``gamma'') of the display
-		  system in floating-point format (e.g., ``2.2''); equal
-		  to the product of the lookup-table exponent (varies)
-		  and the CRT exponent (usually 2.2); must be positive
-    bg  	desired background color in 7-character hex RGB format
-		  (e.g., ``#ff7f00'' for orange:  same as HTML colors);
-		  used with transparent images
-
-Press Q, Esc or mouse button 1 after image is displayed to quit.
-
-
-rpng2-win 1.04 of 19 March 2000:  Progressive PNG Viewer for Windows
-   Compiled with libpng 1.0.5; using libpng 1.0.5.
-   Compiled with zlib 1.1.3; using zlib 1.1.3.
-
-Usage:  rpng2-win [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing] file.png
-
-    exp 	transfer-function exponent (``gamma'') of the display
-		  system in floating-point format (e.g., ``2.2''); equal
-		  to the product of the lookup-table exponent (varies)
-		  and the CRT exponent (usually 2.2); must be positive
-    bg  	desired background color in 7-character hex RGB format
-		  (e.g., ``#ff7f00'' for orange:  same as HTML colors);
-		  used with transparent images; overrides -bgpat
-    pat 	desired background pattern number (1-16); used with
-		  transparent images; overrides -bgcolor
-    -timing	enables delay for every block read, to simulate modem
-		  download of image (~36 Kbps)
-
-Press Q, Esc or mouse button 1 after image is displayed to quit.
-
-
-The usage screen for the third (non-windowed) program, wpng, can be seen
-simply by invoking it without any parameters (``wpng'').
-
-Greg Roelofs
-19 March 2000

contrib/gregbook/makevms.com

@@ -9,21 +9,22 @@ $!    Set locations where zlib and libpng sources live.
 $!
 $ zpath   = ""
 $ pngpath = ""
-$ if f$search("[-.zlib]zlib.h").nes."" then zpath = "[-.zlib]"
-$ if f$search("[-.libpng]png.h").nes."" then pngpath = "[-.libpng]"
 $!
 $ if f$search("[---.zlib]zlib.h").nes."" then zpath = "[---.zlib]"
 $ if f$search("[--]png.h").nes."" then pngpath = "[--]"
 $!
+$ if f$search("[-.zlib]zlib.h").nes."" then zpath = "[-.zlib]"
+$ if f$search("[-.libpng]png.h").nes."" then pngpath = "[-.libpng]"
+$!
 $ if zpath .eqs. ""
 $ then
-$   write sys$output "Zlib include not found. Exiting..."
+$   write sys$output "zlib include not found. Exiting..."
 $   exit 2
 $ endif 
 $!
 $ if pngpath .eqs. ""
 $ then
-$   write sys$output "Libpng include not found. Exiting..."
+$   write sys$output "libpng include not found. Exiting..."
 $   exit 2
 $ endif 
 $!

contrib/gregbook/readpng.c

@@ -239,7 +239,7 @@ uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes)
         return NULL;
     }
 
-    Trace((stderr, "readpng_get_image:  rowbytes = %ld, height = %ld\n", rowbytes, height));
+    Trace((stderr, "readpng_get_image:  channels = %d, rowbytes = %ld, height = %ld\n", *pChannels, rowbytes, height));
 
 
     /* set the individual row_pointers to point at the correct offsets */

contrib/gregbook/readpng2.c

@@ -4,7 +4,13 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+   Changelog:
+    - 1.01:  initial public release
+    - 1.02:  added code to skip unused chunks (GR-P)
+
+  ---------------------------------------------------------------------------
+
+      Copyright (c) 1998-2002 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
@@ -49,8 +55,78 @@ static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg);
 
 void readpng2_version_info(void)
 {
-    fprintf(stderr, "   Compiled with libpng %s; using libpng %s.\n",
-      PNG_LIBPNG_VER_STRING, png_libpng_ver);
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && \
+    (defined(__i386__) || defined(_M_IX86)) && \
+    defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
+    /*
+     * WARNING:  This preprocessor approach means that the following code
+     *           cannot be used with a libpng DLL older than 1.2.0--the
+     *           compiled-in symbols for the new functions will not exist.
+     *           (Could use dlopen() and dlsym() on Unix and corresponding
+     *           calls for Windows, but not portable...)
+     */
+    {
+        int mmxsupport = png_mmx_support();
+        if (mmxsupport < 0)
+            fprintf(stderr, "   Compiled with libpng %s; using libpng %s "
+              "without MMX support.\n", PNG_LIBPNG_VER_STRING, png_libpng_ver);
+        else {
+            int compilerID;
+            png_uint_32 mmx_mask = png_get_mmx_flagmask(
+              PNG_SELECT_READ | PNG_SELECT_WRITE, &compilerID);
+
+            fprintf(stderr, "   Compiled with libpng %s; using libpng %s "
+              "with MMX support\n   (%s version).", PNG_LIBPNG_VER_STRING,
+              png_libpng_ver, compilerID == 1? "MSVC++" :
+              (compilerID == 2? "GNU C" : "unknown"));
+            fprintf(stderr, "  Processor %s MMX instructions.\n",
+              mmxsupport? "supports" : "does not support");
+            if (mmxsupport > 0) {
+                int num_optims = 0;
+
+                fprintf(stderr,
+                  "      Potential MMX optimizations supported by libpng:\n");
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)
+                    ++num_optims;
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_FILTER_UP)
+                    ++num_optims;
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)
+                    ++num_optims;
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)
+                    ++num_optims;
+                if (num_optims)
+                    fprintf(stderr,
+                      "         decoding %s row filters (reading)\n",
+                      (num_optims == 4)? "all non-trivial" : "some");
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) {
+                    fprintf(stderr, "         combining rows (reading)\n");
+                    ++num_optims;
+                }
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_INTERLACE) {
+                    fprintf(stderr,
+                      "         expanding interlacing (reading)\n");
+                    ++num_optims;
+                }
+                mmx_mask &= ~( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  \
+                             | PNG_ASM_FLAG_MMX_READ_INTERLACE    \
+                             | PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
+                             | PNG_ASM_FLAG_MMX_READ_FILTER_UP    \
+                             | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
+                             | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH );
+                if (mmx_mask) {
+                    fprintf(stderr, "         other (unknown)\n");
+                    ++num_optims;
+                }
+                if (num_optims == 0)
+                    fprintf(stderr, "         (none)\n");
+            }
+        }
+    }
+#else
+    fprintf(stderr, "   Compiled with libpng %s; using libpng %s "
+      "without MMX support.\n", PNG_LIBPNG_VER_STRING, png_libpng_ver);
+#endif
+
     fprintf(stderr, "   Compiled with zlib %s; using zlib %s.\n",
       ZLIB_VERSION, zlib_version);
 }
@@ -103,6 +179,40 @@ int readpng2_init(mainprog_info *mainprog_ptr)
         return 2;
     }
 
+    /* prepare the reader to ignore all recognized chunks whose data isn't
+     * going to be used, i.e., all chunks recognized by libpng except for
+     * IHDR, PLTE, IDAT, IEND, tRNS, bKGD, gAMA, and sRGB : */
+
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+    {
+#ifndef HANDLE_CHUNK_NEVER
+/* prior to libpng-1.2.5, this macro was internal, so we define it here. */
+# define HANDLE_CHUNK_NEVER 1
+#endif
+       /* these byte strings were copied from png.h.
+        * If a future libpng version recognizes more chunks, add them
+        * to this list.  If a future version of readpng2.c recognizes
+        * more chunks, delete them from this list. */
+       png_byte png_chunk_types_to_ignore[]=
+          { 99,  72,  82,  77, '\0', /* cHRM */
+           104,  73,  83,  84, '\0', /* hIST */
+           105,  67,  67,  80, '\0', /* iCCP */
+           105,  84,  88, 116, '\0', /* iTXt */
+           111,  70,  70, 115, '\0', /* oFFs */
+           112,  67,  65,  76, '\0', /* pCAL */
+           115,  67,  65,  76, '\0', /* sCAL */
+           112,  72,  89, 115, '\0', /* pHYs */
+           115,  66,  73,  84, '\0', /* sBIT */
+           115,  80,  76,  84, '\0', /* sPLT */
+           116,  69,  88, 116, '\0', /* tEXt */
+           116,  73,  77,  69, '\0', /* tIME */
+           122,  84,  88, 116, '\0'}; /* zTXt */
+#define NUM_PNG_CHUNK_TYPES_TO_IGNORE 13
+
+    png_set_keep_unknown_chunks(png_ptr, HANDLE_CHUNK_NEVER,
+        png_chunk_types_to_ignore, NUM_PNG_CHUNK_TYPES_TO_IGNORE);
+    }
+#endif
 
     /* instead of doing png_init_io() here, now we set up our callback
      * functions for progressive decoding */
@@ -111,6 +221,96 @@ int readpng2_init(mainprog_info *mainprog_ptr)
       readpng2_info_callback, readpng2_row_callback, readpng2_end_callback);
 
 
+    /*
+     * may as well enable or disable MMX routines here, if supported;
+     *
+     * to enable all:  mask = png_get_mmx_flagmask (
+     *                   PNG_SELECT_READ | PNG_SELECT_WRITE, &compilerID);
+     *                 flags = png_get_asm_flags (png_ptr);
+     *                 flags |= mask;
+     *                 png_set_asm_flags (png_ptr, flags);
+     *
+     * to disable all:  mask = png_get_mmx_flagmask (
+     *                   PNG_SELECT_READ | PNG_SELECT_WRITE, &compilerID);
+     *                  flags = png_get_asm_flags (png_ptr);
+     *                  flags &= ~mask;
+     *                  png_set_asm_flags (png_ptr, flags);
+     */
+
+#if (defined(__i386__) || defined(_M_IX86)) && \
+    defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
+    /*
+     * WARNING:  This preprocessor approach means that the following code
+     *           cannot be used with a libpng DLL older than 1.2.0--the
+     *           compiled-in symbols for the new functions will not exist.
+     *           (Could use dlopen() and dlsym() on Unix and corresponding
+     *           calls for Windows, but not portable...)
+     */
+    {
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+        png_uint_32 mmx_disable_mask = 0;
+        png_uint_32 asm_flags, mmx_mask;
+        int compilerID;
+
+        if (mainprog_ptr->nommxfilters)
+            mmx_disable_mask |= ( PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
+                                | PNG_ASM_FLAG_MMX_READ_FILTER_UP    \
+                                | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
+                                | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH );
+        if (mainprog_ptr->nommxcombine)
+            mmx_disable_mask |= PNG_ASM_FLAG_MMX_READ_COMBINE_ROW;
+        if (mainprog_ptr->nommxinterlace)
+            mmx_disable_mask |= PNG_ASM_FLAG_MMX_READ_INTERLACE;
+        asm_flags = png_get_asm_flags(png_ptr);
+        png_set_asm_flags(png_ptr, asm_flags & ~mmx_disable_mask);
+
+
+        /* Now query libpng's asm settings, just for yuks.  Note that this
+         * differs from the querying of its *potential* MMX capabilities
+         * in readpng2_version_info(); this is true runtime verification. */
+
+        asm_flags = png_get_asm_flags(png_ptr);
+        mmx_mask = png_get_mmx_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE,
+          &compilerID);
+        if (asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED)
+            fprintf(stderr,
+              "  MMX support (%s version) is compiled into libpng\n",
+              compilerID == 1? "MSVC++" :
+              (compilerID == 2? "GNU C" : "unknown"));
+        else
+            fprintf(stderr, "  MMX support is not compiled into libpng\n");
+        fprintf(stderr, "  MMX instructions are %ssupported by CPU\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU)? "" : "not ");
+        fprintf(stderr, "  MMX read support for combining rows is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)? "en" : "dis");
+        fprintf(stderr,
+          "  MMX read support for expanding interlacing is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE)? "en" : "dis");
+        fprintf(stderr, "  MMX read support for \"sub\" filter is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "en" : "dis");
+        fprintf(stderr, "  MMX read support for \"up\" filter is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "en" : "dis");
+        fprintf(stderr, "  MMX read support for \"avg\" filter is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "en" : "dis");
+        fprintf(stderr, "  MMX read support for \"Paeth\" filter is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "en" : "dis");
+        asm_flags &= (mmx_mask & ~( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  \
+                                  | PNG_ASM_FLAG_MMX_READ_INTERLACE    \
+                                  | PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
+                                  | PNG_ASM_FLAG_MMX_READ_FILTER_UP    \
+                                  | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
+                                  | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ));
+        if (asm_flags)
+            fprintf(stderr,
+              "  additional MMX support is also enabled (0x%02lx)\n",
+              asm_flags);
+#else  /* !PNG_ASSEMBLER_CODE_SUPPORTED */
+        fprintf(stderr, "  MMX querying is disabled in libpng.\n");
+#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
+    }
+#endif
+
+
     /* make sure we save our pointers for use in readpng2_decode_data() */
 
     mainprog_ptr->png_ptr = png_ptr;

contrib/gregbook/readpng2.h

@@ -4,7 +4,7 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
@@ -66,6 +66,11 @@ typedef struct _mainprog_info {
     int rowbytes;
     int channels;
     int need_bgcolor;
+#if (defined(__i386__) || defined(_M_IX86))
+    int nommxfilters;
+    int nommxcombine;
+    int nommxinterlace;
+#endif
     int done;
     uch bg_red;
     uch bg_green;

contrib/gregbook/rpng-win.c

@@ -9,7 +9,6 @@
    with a little tweaking (or maybe not).
 
    to do:
-    - stdout/stderr don't work!  need message window (maybe scrollable?)
     - handle quoted command-line args (especially filenames with spaces)
     - have minimum window width:  oh well
     - use %.1023s to simplify truncation of title-bar string?
@@ -22,10 +21,11 @@
               match; switched to png_jmpbuf() macro
     - 1.02:  added extra set of parentheses to png_jmpbuf() macro; fixed
               command-line parsing bug
+    - 1.10:  enabled "message window"/console (thanks to David Geldreich)
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
@@ -52,13 +52,14 @@
 
 #define PROGNAME  "rpng-win"
 #define LONGNAME  "Simple PNG Viewer for Windows"
-#define VERSION   "1.02 of 19 March 2000"
+#define VERSION   "1.20 of 28 May 2001"
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include <windows.h>
+#include <conio.h>      /* only for _getch() */
 
 /* #define DEBUG  :  this enables the Trace() macros */
 
@@ -128,7 +129,17 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     filename = (char *)NULL;
 
 
-    /* First set the default value for our display-system exponent, i.e.,
+    /* First reenable console output, which normally goes to the bit bucket
+     * for windowed apps.  Closing the console window will terminate the
+     * app.  Thanks to David.Geldreich@realviz.com for supplying the magical
+     * incantation. */
+
+    AllocConsole();
+    freopen("CONOUT$", "a", stderr);
+    freopen("CONOUT$", "a", stdout);
+
+
+    /* Next set the default value for our display-system exponent, i.e.,
      * the product of the CRT exponent and the exponent corresponding to
      * the frame-buffer's lookup table (LUT), if any.  This is not an
      * exhaustive list of LUT values (e.g., OpenStep has a lot of weird
@@ -272,20 +283,31 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     /* usage screen */
 
     if (error) {
-        fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
+        int ch;
+
+        fprintf(stderr, "\n%s %s:  %s\n\n", PROGNAME, VERSION, appname);
         readpng_version_info();
         fprintf(stderr, "\n"
-         "Usage:  %s [-gamma exp] [-bgcolor bg] file.png\n"
-         "    exp \ttransfer-function exponent (``gamma'') of the display\n"
-         "\t\t  system in floating-point format (e.g., ``%.1f''); equal\n"
-         "\t\t  to the product of the lookup-table exponent (varies)\n"
-         "\t\t  and the CRT exponent (usually 2.2); must be positive\n"
-         "    bg  \tdesired background color in 7-character hex RGB format\n"
-         "\t\t  (e.g., ``#ff7700'' for orange:  same as HTML colors);\n"
-         "\t\t  used with transparent images\n"
-         "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n"
-         "\n", PROGNAME, default_display_exponent);
+          "Usage:  %s [-gamma exp] [-bgcolor bg] file.png\n"
+          "    exp \ttransfer-function exponent (``gamma'') of the display\n"
+          "\t\t  system in floating-point format (e.g., ``%.1f''); equal\n"
+          "\t\t  to the product of the lookup-table exponent (varies)\n"
+          "\t\t  and the CRT exponent (usually 2.2); must be positive\n"
+          "    bg  \tdesired background color in 7-character hex RGB format\n"
+          "\t\t  (e.g., ``#ff7700'' for orange:  same as HTML colors);\n"
+          "\t\t  used with transparent images\n"
+          "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n"
+          "Press Q or Esc to quit this usage screen.\n"
+          "\n", PROGNAME, default_display_exponent);
+        do
+            ch = _getch();
+        while (ch != 'q' && ch != 'Q' && ch != 0x1B);
         exit(1);
+    } else {
+        fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
+        fprintf(stderr,
+          "\n   [console window:  closing this window will terminate %s]\n\n",
+          PROGNAME);
     }
 
 

contrib/gregbook/rpng-x.c

@@ -21,10 +21,12 @@
     - 1.10:  added support for non-default visuals; fixed X pixel-conversion
     - 1.11:  added extra set of parentheses to png_jmpbuf() macro; fixed
               command-line parsing bug
+    - 1.12:  fixed small X memory leak (thanks to Francois Petitjean)
+    - 1.13:  fixed XFreeGC() crash bug
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
@@ -51,7 +53,7 @@
 
 #define PROGNAME  "rpng-x"
 #define LONGNAME  "Simple PNG Viewer for X"
-#define VERSION   "1.11 of 19 March 2000"
+#define VERSION   "1.13 of 16 August 2001"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -117,6 +119,7 @@ static Colormap colormap;
 static int have_nondefault_visual = FALSE;
 static int have_colormap = FALSE;
 static int have_window = FALSE;
+static int have_gc = FALSE;
 /*
 ulg numcolors=0, pixels[256];
 ush reds[256], greens[256], blues[256];
@@ -542,9 +545,20 @@ static int rpng_x_create_window(void)
     XSetWMProperties(display, window, pWindowName, pIconName, NULL, 0,
       size_hints, wm_hints, NULL);
 
+    /* various properties and hints no longer needed; free memory */
+    if (pWindowName)
+       XFree(pWindowName->value);
+    if (pIconName)
+       XFree(pIconName->value);
+    if (size_hints)
+        XFree(size_hints);
+    if (wm_hints)
+       XFree(wm_hints);
+
     XMapWindow(display, window);
 
     gc = XCreateGC(display, window, 0, &gcvalues);
+    have_gc = TRUE;
 
 /*---------------------------------------------------------------------------
     Fill window with the specified background color.
@@ -814,7 +828,8 @@ static void rpng_x_cleanup(void)
         ximage = NULL;
     }
 
-    XFreeGC(display, gc);
+    if (have_gc)
+        XFreeGC(display, gc);
 
     if (have_window)
         XDestroyWindow(display, window);

contrib/gregbook/rpng2-win.c

@@ -11,7 +11,6 @@
    Meulen for the "diamond" and "radial waves" patterns, respectively.
 
    to do:
-    - stdout/stderr don't work!  need message window (maybe scrollable?)
     - handle quoted command-line args (especially filenames with spaces)
     - finish resizable checkerboard-gradient (sizes 4-128?)
     - use %.1023s to simplify truncation of title-bar string?
@@ -25,10 +24,13 @@
     - 1.03:  modified to allow abbreviated options
     - 1.04:  removed bogus extra argument from usage fprintf() [Glenn R-P?];
               fixed command-line parsing bug
+    - 1.10:  enabled "message window"/console (thanks to David Geldreich)
+    - 1.20:  added runtime MMX-enabling/disabling and new -mmx* options
+    - 1.21:  made minor tweak to usage screen to fit within 25-line console
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
@@ -55,7 +57,7 @@
 
 #define PROGNAME  "rpng2-win"
 #define LONGNAME  "Progressive PNG Viewer for Windows"
-#define VERSION   "1.04 of 19 March 2000"
+#define VERSION   "1.21 of 29 June 2001"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -64,6 +66,7 @@
 #include <time.h>
 #include <math.h>      /* only for PvdM background code */
 #include <windows.h>
+#include <conio.h>     /* only for _getch() */
 
 /* all for PvdM background code: */
 #ifndef PI
@@ -239,6 +242,16 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     memset(&rpng2_info, 0, sizeof(mainprog_info));
 
 
+    /* Next reenable console output, which normally goes to the bit bucket
+     * for windowed apps.  Closing the console window will terminate the
+     * app.  Thanks to David.Geldreich@realviz.com for supplying the magical
+     * incantation. */
+
+    AllocConsole();
+    freopen("CONOUT$", "a", stderr);
+    freopen("CONOUT$", "a", stdout);
+
+
     /* Set the default value for our display-system exponent, i.e., the
      * product of the CRT exponent and the exponent corresponding to
      * the frame-buffer's lookup table (LUT), if any.  This is not an
@@ -354,6 +367,18 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
             }
         } else if (!strncmp(*argv, "-timing", 2)) {
             timing = TRUE;
+#if (defined(__i386__) || defined(_M_IX86))
+        } else if (!strncmp(*argv, "-nommxfilters", 7)) {
+            rpng2_info.nommxfilters = TRUE;
+        } else if (!strncmp(*argv, "-nommxcombine", 7)) {
+            rpng2_info.nommxcombine = TRUE;
+        } else if (!strncmp(*argv, "-nommxinterlace", 7)) {
+            rpng2_info.nommxinterlace = TRUE;
+        } else if (!strcmp(*argv, "-nommx")) {
+            rpng2_info.nommxfilters = TRUE;
+            rpng2_info.nommxcombine = TRUE;
+            rpng2_info.nommxinterlace = TRUE;
+#endif
         } else {
             if (**argv != '-') {
                 filename = *argv;
@@ -401,25 +426,49 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     /* usage screen */
 
     if (error) {
-        fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
+        int ch;
+
+        fprintf(stderr, "\n%s %s:  %s\n\n", PROGNAME, VERSION, appname);
         readpng2_version_info();
         fprintf(stderr, "\n"
-          "Usage:  %s [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing]"
-          " file.png\n\n"
+          "Usage:  %s [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing]\n"
+#if (defined(__i386__) || defined(_M_IX86))
+          "        %*s [[-nommxfilters] [-nommxcombine] [-nommxinterlace] | -nommx]\n"
+#endif
+          "        %*s file.png\n\n"
           "    exp \ttransfer-function exponent (``gamma'') of the display\n"
           "\t\t  system in floating-point format (e.g., ``%.1f''); equal\n"
           "\t\t  to the product of the lookup-table exponent (varies)\n"
           "\t\t  and the CRT exponent (usually 2.2); must be positive\n"
           "    bg  \tdesired background color in 7-character hex RGB format\n"
           "\t\t  (e.g., ``#ff7700'' for orange:  same as HTML colors);\n"
-          "\t\t  used with transparent images; overrides -bgpat\n"
+          "\t\t  used with transparent images; overrides -bgpat option\n"
           "    pat \tdesired background pattern number (1-%d); used with\n"
-          "\t\t  transparent images; overrides -bgcolor\n"
+          "\t\t  transparent images; overrides -bgcolor option\n"
           "    -timing\tenables delay for every block read, to simulate modem\n"
           "\t\t  download of image (~36 Kbps)\n"
+#if (defined(__i386__) || defined(_M_IX86))
+          "    -nommx*\tdisable optimized MMX routines for decoding row filters,\n"
+          "\t\t  combining rows, and expanding interlacing, respectively\n"
+#endif
           "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n"
-          "\n", PROGNAME, default_display_exponent, num_bgpat);
+          "Press Q or Esc to quit this usage screen. ",
+          PROGNAME,
+#if (defined(__i386__) || defined(_M_IX86))
+          strlen(PROGNAME), " ",
+#endif
+          strlen(PROGNAME), " ", default_display_exponent, num_bgpat);
+        fflush(stderr);
+        do
+            ch = _getch();
+        while (ch != 'q' && ch != 'Q' && ch != 0x1B);
         exit(1);
+    } else {
+        fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
+        fprintf(stderr,
+          "\n   [console window:  closing this window will terminate %s]\n\n",
+          PROGNAME);
+        fflush(stderr);
     }
 
 

contrib/gregbook/rpng2-x.c

@@ -25,10 +25,13 @@
     - 1.10:  added support for non-default visuals; fixed X pixel-conversion
     - 1.11:  added -usleep option for demos; fixed command-line parsing bug
     - 1.12:  added -pause option for demos and testing
+    - 1.20:  added runtime MMX-enabling/disabling and new -mmx* options
+    - 1.21:  fixed small X memory leak (thanks to Francois Petitjean)
+    - 1.22:  fixed XFreeGC() crash bug
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
@@ -55,7 +58,7 @@
 
 #define PROGNAME  "rpng2-x"
 #define LONGNAME  "Progressive PNG Viewer for X"
-#define VERSION   "1.12 of 19 March 2000"
+#define VERSION   "1.22 of 16 August 2001"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -226,6 +229,7 @@ static Colormap colormap;
 static int have_nondefault_visual = FALSE;
 static int have_colormap = FALSE;
 static int have_window = FALSE;
+static int have_gc = FALSE;
 
 
 
@@ -359,6 +363,18 @@ int main(int argc, char **argv)
             pause_after_pass = TRUE;
         } else if (!strncmp(*argv, "-timing", 2)) {
             timing = TRUE;
+#if (defined(__i386__) || defined(_M_IX86))
+        } else if (!strncmp(*argv, "-nommxfilters", 7)) {
+            rpng2_info.nommxfilters = TRUE;
+        } else if (!strncmp(*argv, "-nommxcombine", 7)) {
+            rpng2_info.nommxcombine = TRUE;
+        } else if (!strncmp(*argv, "-nommxinterlace", 7)) {
+            rpng2_info.nommxinterlace = TRUE;
+        } else if (!strcmp(*argv, "-nommx")) {
+            rpng2_info.nommxfilters = TRUE;
+            rpng2_info.nommxcombine = TRUE;
+            rpng2_info.nommxinterlace = TRUE;
+#endif
         } else {
             if (**argv != '-') {
                 filename = *argv;
@@ -414,10 +430,13 @@ int main(int argc, char **argv)
     /* usage screen */
 
     if (error) {
-        fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
+        fprintf(stderr, "\n%s %s:  %s\n\n", PROGNAME, VERSION, appname);
         readpng2_version_info();
         fprintf(stderr, "\n"
           "Usage:  %s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n"
+#if (defined(__i386__) || defined(_M_IX86))
+          "        %*s [[-nommxfilters] [-nommxcombine] [-nommxinterlace] | -nommx]\n"
+#endif
           "        %*s [-usleep dur | -timing] [-pause] file.png\n\n"
           "    xdpy\tname of the target X display (e.g., ``hostname:0'')\n"
           "    exp \ttransfer-function exponent (``gamma'') of the display\n"
@@ -429,6 +448,10 @@ int main(int argc, char **argv)
           "\t\t  used with transparent images; overrides -bgpat\n"
           "    pat \tdesired background pattern number (1-%d); used with\n"
           "\t\t  transparent images; overrides -bgcolor\n"
+#if (defined(__i386__) || defined(_M_IX86))
+          "    -nommx*\tdisable optimized MMX routines for decoding row filters,\n"
+          "\t\t  combining rows, and expanding interlacing, respectively\n"
+#endif
           "    dur \tduration in microseconds to wait after displaying each\n"
           "\t\t  row (for demo purposes)\n"
           "    -timing\tenables delay for every block read, to simulate modem\n"
@@ -436,8 +459,11 @@ int main(int argc, char **argv)
           "    -pause\tpauses after displaying each pass until key pressed\n"
           "\nPress Q, Esc or mouse button 1 (within image window, after image\n"
           "is displayed) to quit.\n"
-          "\n", PROGNAME, strlen(PROGNAME), " ", default_display_exponent,
-          num_bgpat);
+          "\n", PROGNAME,
+#if (defined(__i386__) || defined(_M_IX86))
+          strlen(PROGNAME), " ",
+#endif
+          strlen(PROGNAME), " ", default_display_exponent, num_bgpat);
         exit(1);
     }
 
@@ -562,8 +588,16 @@ static void rpng2_x_init(void)
      * pattern */
 
     if (rpng2_x_create_window()) {
+
+        /* GRR TEMPORARY HACK:  this is fundamentally no different from cases
+         * above; libpng should longjmp() back to us when png_ptr goes away.
+         * If we/it segfault instead, seems like a libpng bug... */
+
+        /* we're here via libpng callback, so if window fails, clean and bail */
+printf("readpng2_cleanup.\n");
         readpng2_cleanup(&rpng2_info);
-        return;
+        rpng2_x_cleanup();
+        exit(2);
     }
 }
 
@@ -715,9 +749,20 @@ static int rpng2_x_create_window(void)
     XSetWMProperties(display, window, pWindowName, pIconName, NULL, 0,
       size_hints, wm_hints, NULL);
 
+    /* various properties and hints no longer needed; free memory */
+    if (pWindowName)
+       XFree(pWindowName->value);
+    if (pIconName)
+       XFree(pIconName->value);
+    if (size_hints)
+        XFree(size_hints);
+    if (wm_hints)
+       XFree(wm_hints);
+
     XMapWindow(display, window);
 
     gc = XCreateGC(display, window, 0, &gcvalues);
+    have_gc = TRUE;
 
 /*---------------------------------------------------------------------------
     Allocate memory for the X- and display-specific version of the image.
@@ -1333,7 +1378,8 @@ static void rpng2_x_cleanup(void)
         ximage = NULL;
     }
 
-    XFreeGC(display, gc);
+    if (have_gc)
+        XFreeGC(display, gc);
 
     if (have_window)
         XDestroyWindow(display, window);

contrib/msvctest/msvctest.dsp

@@ -54,7 +54,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 /nologo /subsystem:console /machine:I386
-# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll\libpng1.lib /nologo /subsystem:console /machine:I386
+# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll\libpng13.lib /nologo /subsystem:console /machine:I386
 # Begin Special Build Tool
 OutDir=.\dll
 SOURCE="$(InputPath)"
@@ -84,7 +84,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll_dbg\libpng1d.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll_dbg\libpng13d.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 # Begin Special Build Tool
 OutDir=.\dll_dbg
 SOURCE="$(InputPath)"
@@ -114,7 +114,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 /nologo /subsystem:console /machine:I386
-# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll_asm\libpng1a.lib /nologo /subsystem:console /machine:I386
+# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll_asm\libpng13a.lib /nologo /subsystem:console /machine:I386
 # Begin Special Build Tool
 OutDir=.\dll_asm
 SOURCE="$(InputPath)"
@@ -144,7 +144,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll_dbga\libpng1b.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll_dbga\libpng13b.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 # Begin Special Build Tool
 OutDir=.\dll_dbga
 SOURCE="$(InputPath)"

contrib/pngminus/makefile.std

@@ -1,26 +1,31 @@
 # Makefile for PngMinus (png2pnm and pnm2png)
 # Linux / Unix
 
-CC=cc -O
-LD=cc -O
-#CC=gcc -O
-#LD=gcc -O
-LB=ar
-RM=rm
-CP=cp
+#CC=cc
+CC=gcc
+LD=$(CC)
 
-PNGPATH = /usr/local
-PNGINC = $(PNGPATH)/include
-#PNGLIB = $(PNGPATH)/lib -lpng
-PNGLIB = $(PNGPATH)/lib/libpng.a
+RM=rm -f
 
-ZPATH = /usr/local
-ZINC = $(ZPATH)/include
-#ZLIB = $(ZPATH)/lib -lz
-ZLIB = $(ZPATH)/lib/libz.a
+#PNGPATH = /usr/local
+#PNGINC = -I$(PNGPATH)/include/libpng12
+#PNGLIB = -L$(PNGPATH)/lib -lpng12
+#PNGLIBS = $(PNGPATH)/lib/libpng12.a
+PNGINC = -I../..
+PNGLIB = -L../.. -lpng
+PNGLIBS = ../../libpng.a
 
-CCFLAGS=-I$(PNGINC) -I$(ZINC)
-LDFLAGS=-L$(PNGLIB) -L$(ZLIB)
+#ZPATH = /usr/local
+#ZINC = -I$(ZPATH)/include
+#ZLIB = -L$(ZPATH)/lib -lz
+#ZLIBS = $(ZPATH)/lib/libz.a
+ZINC = -I../../../zlib
+ZLIB = -L../../../zlib -lz
+ZLIBS = ../../../zlib/libz.a
+
+CFLAGS=-O3 $(PNGINC) $(ZINC)
+LDFLAGS=$(PNGLIB) $(ZLIB)
+LDFLAGSS=$(PNGLIBS) $(ZLIBS)
 C=.c
 O=.o
 L=.a
@@ -28,25 +33,33 @@ E=
 
 # dependencies
 
-all: png2pnm$(E) pnm2png$(E)
+#all: png2pnm$(E) pnm2png$(E)
+all: png2pnm$(E) pnm2png$(E) png2pnm-static$(E) pnm2png-static$(E)
 
 png2pnm$(O): png2pnm$(C)
-	$(CC) -c $(CCFLAGS) png2pnm$(C)
+	$(CC) -c $(CFLAGS) png2pnm$(C)
 
 png2pnm$(E): png2pnm$(O)
-	$(LD) -o png2pnm$(E) png2pnm$(O) $(LDFLAGS) -lpng -lz -lm
+	$(LD) -o png2pnm$(E) png2pnm$(O) $(LDFLAGS) -lm
+
+png2pnm-static$(E): png2pnm$(O)
+	$(LD) -o png2pnm-static$(E) png2pnm$(O) $(LDFLAGSS) -lm
 
 pnm2png$(O): pnm2png$(C)
-	$(CC) -c $(CCFLAGS) pnm2png$(C)
+	$(CC) -c $(CFLAGS) pnm2png$(C)
 
 pnm2png$(E): pnm2png$(O)
-	$(LD) -o pnm2png$(E) pnm2png$(O) $(LDFLAGS) -lpng -lz -lm
+	$(LD) -o pnm2png$(E) pnm2png$(O) $(LDFLAGS) -lm
+
+pnm2png-static$(E): pnm2png$(O)
+	$(LD) -o pnm2png-static$(E) pnm2png$(O) $(LDFLAGSS) -lm
 
 clean:
 	$(RM) png2pnm$(O)
 	$(RM) pnm2png$(O)
 	$(RM) png2pnm$(E)
 	$(RM) pnm2png$(E)
+	$(RM) png2pnm-static$(E)
+	$(RM) pnm2png-static$(E)
 
 # End of makefile for png2pnm / pnm2png
-

contrib/visupng/VisualPng.dsp

@@ -59,8 +59,8 @@ BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
 LINK32=link.exe
-# ADD BASE LINK32 libpng1.lib zlibd.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /machine:I386 /libpath:"libpng" /libpath:"zlib"
-# ADD LINK32 libpng1.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /machine:I386 /libpath:"..\..\projects\msvc\win32\libpng\dll"
+# ADD BASE LINK32 libpng13.lib zlibd.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /machine:I386 /libpath:"libpng" /libpath:"zlib"
+# ADD LINK32 libpng13.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /machine:I386 /libpath:"..\..\projects\msvc\win32\libpng\dll"
 # Begin Special Build Tool
 OutDir=.\dll
 SOURCE="$(InputPath)"
@@ -92,9 +92,9 @@ BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
 LINK32=link.exe
-# ADD BASE LINK32 libpng1.lib zlibd.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /debug /machine:I386 /nodefaultlib:"libc" /pdbtype:sept /libpath:"libpng" /libpath:"zlib"
+# ADD BASE LINK32 libpng13.lib zlibd.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /debug /machine:I386 /nodefaultlib:"libc" /pdbtype:sept /libpath:"libpng" /libpath:"zlib"
 # SUBTRACT BASE LINK32 /nodefaultlib
-# ADD LINK32 libpng1d.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /debug /machine:I386 /nodefaultlib:"libc" /pdbtype:sept /libpath:"..\..\projects\msvc\win32\libpng\dll_dbg"
+# ADD LINK32 libpng13d.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /debug /machine:I386 /nodefaultlib:"libc" /pdbtype:sept /libpath:"..\..\projects\msvc\win32\libpng\dll_dbg"
 # SUBTRACT LINK32 /nodefaultlib
 # Begin Special Build Tool
 OutDir=.\dll_dbg
@@ -128,7 +128,7 @@ BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
 LINK32=link.exe
-# ADD BASE LINK32 libpng1.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /machine:I386 /libpath:"..\..\projects\msvc\win32\libpng\dll"
+# ADD BASE LINK32 libpng13.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /machine:I386 /libpath:"..\..\projects\msvc\win32\libpng\dll"
 # ADD LINK32 libpng.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /machine:I386 /libpath:"..\..\projects\msvc\win32\libpng\lib"
 # Begin Special Build Tool
 OutDir=.\lib
@@ -161,7 +161,7 @@ BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
 LINK32=link.exe
-# ADD BASE LINK32 libpng1d.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /debug /machine:I386 /nodefaultlib:"libc" /pdbtype:sept /libpath:"..\..\projects\msvc\win32\libpng\dll_dbg"
+# ADD BASE LINK32 libpng13d.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /debug /machine:I386 /nodefaultlib:"libc" /pdbtype:sept /libpath:"..\..\projects\msvc\win32\libpng\dll_dbg"
 # SUBTRACT BASE LINK32 /nodefaultlib
 # ADD LINK32 libpng.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:windows /debug /machine:I386 /nodefaultlib:"libc" /pdbtype:sept /libpath:"..\..\projects\msvc\win32\libpng\lib_dbg"
 # SUBTRACT LINK32 /nodefaultlib

example.c

@@ -114,7 +114,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
    if (info_ptr == NULL)
    {
       fclose(fp);
-      png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
+      png_destroy_read_struct(&png_ptr, png_infopp_NULL, png_infopp_NULL);
       return (ERROR);
    }
 
@@ -126,7 +126,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
    if (setjmp(png_jmpbuf(png_ptr)))
    {
       /* Free all of the memory associated with the png_ptr and info_ptr */
-      png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
+      png_destroy_read_struct(&png_ptr, &info_ptr, png_infopp_NULL);
       fclose(fp);
       /* If we get here, we had a problem reading the file */
       return (ERROR);
@@ -157,7 +157,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
     * adjustment), then you can read the entire image (including
     * pixels) into the info structure with this call:
     */
-   png_read_png(png_ptr, info_ptr, png_transforms, NULL);
+   png_read_png(png_ptr, info_ptr, png_transforms, png_voidp_NULL);
 #else
    /* OK, you're doing it the hard way, with the lower-level functions */
 
@@ -167,13 +167,13 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
    png_read_info(png_ptr, info_ptr);
 
    png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,
-       &interlace_type, NULL, NULL);
+       &interlace_type, int_p_NULL, int_p_NULL);
 
-/**** Set up the data transformations you want.  Note that these are all
- **** optional.  Only call them if you want/need them.  Many of the
- **** transformations only work on specific types of images, and many
- **** are mutually exclusive.
- ****/
+/* Set up the data transformations you want.  Note that these are all
+ * optional.  Only call them if you want/need them.  Many of the
+ * transformations only work on specific types of images, and many
+ * are mutually exclusive.
+ */
 
    /* tell libpng to strip 16 bit/color files down to 8 bits/color */
    png_set_strip_16(png_ptr);
@@ -194,17 +194,17 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
 
    /* Expand paletted colors into true RGB triplets */
    if (color_type == PNG_COLOR_TYPE_PALETTE)
-      png_set_expand(png_ptr);
+      png_set_palette_rgb(png_ptr);
 
    /* Expand grayscale images to the full 8 bits from 1, 2, or 4 bits/pixel */
    if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
-      png_set_expand(png_ptr);
+      png_set_gray_1_2_4_to_8(png_ptr);
 
    /* Expand paletted or RGB images with transparency to full alpha channels
     * so the data will be available as RGBA quartets.
     */
    if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
-      png_set_expand(png_ptr);
+      png_set_tRNS_to_alpha(png_ptr);
 
    /* Set the background color to draw transparent and alpha images over.
     * It is possible to set the red, green, and blue components directly
@@ -267,7 +267,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
     */
    if (color_type & PNG_COLOR_MASK_COLOR)
    {
-      png_uint_32 num_palette;
+      int num_palette;
       png_colorp palette;
 
       /* This reduces the image to the application supplied palette */
@@ -277,12 +277,12 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
          png_color std_color_cube[MAX_SCREEN_COLORS];
 
          png_set_dither(png_ptr, std_color_cube, MAX_SCREEN_COLORS,
-            MAX_SCREEN_COLORS, NULL, 0);
+            MAX_SCREEN_COLORS, png_uint_16p_NULL, 0);
       }
       /* This reduces the image to the palette supplied in the file */
       else if (png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette))
       {
-         png_uint_16p histogram;
+         png_uint_16p histogram = NULL;
 
          png_get_hIST(png_ptr, info_ptr, &histogram);
 
@@ -338,7 +338,8 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
 
    for (row = 0; row < height; row++)
    {
-      row_pointers[row] = malloc(png_get_rowbytes(png_ptr, info_ptr));
+      row_pointers[row] = png_malloc(png_ptr, png_get_rowbytes(png_ptr,
+         info_ptr));
    }
 
    /* Now it's time to read the image.  One of these methods is REQUIRED */
@@ -353,18 +354,18 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
 #ifdef single /* Read the image a single row at a time */
       for (y = 0; y < height; y++)
       {
-         png_read_rows(png_ptr, &row_pointers[y], NULL, 1);
+         png_read_rows(png_ptr, &row_pointers[y], png_bytepp_NULL, 1);
       }
 
 #else no_single /* Read the image several rows at a time */
       for (y = 0; y < height; y += number_of_rows)
       {
 #ifdef sparkle /* Read the image using the "sparkle" effect. */
-         png_read_rows(png_ptr, &row_pointers[y], NULL, number_of_rows);
-
-         png_read_rows(png_ptr, NULL, row_pointers[y], number_of_rows);
+         png_read_rows(png_ptr, &row_pointers[y], png_bytepp_NULL,
+            number_of_rows);
 #else no_sparkle /* Read the image using the "rectangle" effect */
-         png_read_rows(png_ptr, NULL, &row_pointers[y], number_of_rows);
+         png_read_rows(png_ptr, png_bytepp_NULL, &row_pointers[y],
+            number_of_rows);
 #endif no_sparkle /* use only one of these two methods */
       }
 
@@ -381,7 +382,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* file is already open */
    /* At this point you have read the entire image */
 
    /* clean up after the read, and free any memory allocated - REQUIRED */
-   png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
+   png_destroy_read_struct(&png_ptr, &info_ptr, png_infopp_NULL);
 
    /* close the file */
    fclose(fp);
@@ -414,13 +415,13 @@ initialize_png_reader(png_structp *png_ptr, png_infop *info_ptr)
 
    if (*info_ptr == NULL)
    {
-      png_destroy_read_struct(png_ptr, info_ptr, (png_infopp)NULL);
+      png_destroy_read_struct(png_ptr, info_ptr, png_infopp_NULL);
       return (ERROR);
    }
 
    if (setjmp(png_jmpbuf((*png_ptr))))
    {
-      png_destroy_read_struct(png_ptr, info_ptr, (png_infopp)NULL);
+      png_destroy_read_struct(png_ptr, info_ptr, png_infopp_NULL);
       return (ERROR);
    }
 
@@ -449,7 +450,7 @@ process_data(png_structp *png_ptr, png_infop *info_ptr,
    if (setjmp(png_jmpbuf((*png_ptr))))
    {
       /* Free the png_ptr and info_ptr memory on error */
-      png_destroy_read_struct(png_ptr, info_ptr, (png_infopp)NULL);
+      png_destroy_read_struct(png_ptr, info_ptr, png_infopp_NULL);
       return (ERROR);
    }
 
@@ -481,21 +482,47 @@ info_callback(png_structp png_ptr, png_infop info)
 row_callback(png_structp png_ptr, png_bytep new_row,
    png_uint_32 row_num, int pass)
 {
-/* this function is called for every row in the image.  If the
- * image is interlacing, and you turned on the interlace handler,
+/*
+ * This function is called for every row in the image.  If the
+ * image is interlaced, and you turned on the interlace handler,
  * this function will be called for every row in every pass.
- * Some of these rows will not be changed from the previous pass.
- * When the row is not changed, the new_row variable will be NULL.
+ *
+ * In this function you will receive a pointer to new row data from
+ * libpng called new_row that is to replace a corresponding row (of
+ * the same data format) in a buffer allocated by your application.
+ * 
+ * The new row data pointer new_row may be NULL, indicating there is
+ * no new data to be replaced (in cases of interlace loading).
+ * 
+ * If new_row is not NULL then you need to call
+ * png_progressive_combine_row() to replace the corresponding row as
+ * shown below:
+ */
+   /* Check if row_num is in bounds. */
+   if((row_num >= 0) && (row_num < height))
+   {
+     /* Get pointer to corresponding row in our
+      * PNG read buffer.
+      */
+     png_bytep old_row = ((png_bytep *)our_data)[row_num];
+
+     /* If both rows are allocated then copy the new row
+      * data to the corresponding row data.
+      */
+     if((old_row != NULL) && (new_row != NULL))
+     png_progressive_combine_row(png_ptr, old_row, new_row);
+   }
+/*
  * The rows and passes are called in order, so you don't really
  * need the row_num and pass, but I'm supplying them because it
  * may make your life easier.
  *
  * For the non-NULL rows of interlaced images, you must call
- * png_progressive_combine_row() passing in the row and the
- * old row.  You can call this function for NULL rows (it will
- * just return) and for non-interlaced images (it just does the
- * memcpy for you) if it will make the code easier.  Thus, you
- * can just do this for all cases:
+ * png_progressive_combine_row() passing in the new row and the
+ * old row, as demonstrated above.  You can call this function for
+ * NULL rows (it will just return) and for non-interlaced images
+ * (it just does the png_memcpy for you) if it will make the code
+ * easier.  Thus, you can just do this for all cases:
  */
 
    png_progressive_combine_row(png_ptr, old_row, new_row);
@@ -504,8 +531,8 @@ row_callback(png_structp png_ptr, png_bytep new_row,
  * that the first pass (pass == 0 really) will completely cover
  * the old row, so the rows do not have to be initialized.  After
  * the first pass (and only for interlaced images), you will have
- * to pass the current row, and the function will combine the
- * old row and the new row.
+ * to pass the current row as new_row, and the function will combine
+ * the old row and the new row.
  */
 }
 
@@ -555,7 +582,7 @@ void write_png(char *file_name /* , ... other image information ... */)
    if (info_ptr == NULL)
    {
       fclose(fp);
-      png_destroy_write_struct(&png_ptr,  (png_infopp)NULL);
+      png_destroy_write_struct(&png_ptr,  png_infopp_NULL);
       return (ERROR);
    }
 
@@ -587,7 +614,7 @@ void write_png(char *file_name /* , ... other image information ... */)
     * image info living info in the structure.  You could "|" many
     * PNG_TRANSFORM flags into the png_transforms integer here.
     */
-   png_write_png(png_ptr, info_ptr, png_transforms, NULL);
+   png_write_png(png_ptr, info_ptr, png_transforms, png_voidp_NULL);
 #else
    /* This is the hard way */
 
@@ -603,9 +630,10 @@ void write_png(char *file_name /* , ... other image information ... */)
       PNG_INTERLACE_????, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
 
    /* set the palette if there is one.  REQUIRED for indexed-color images */
-   palette = (png_colorp)png_malloc(png_ptr, 256 * sizeof (png_color));
+   palette = (png_colorp)png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH
+             * sizeof (png_color));
    /* ... set palette colors ... */
-   png_set_PLTE(png_ptr, info_ptr, palette, 256);
+   png_set_PLTE(png_ptr, info_ptr, palette, PNG_MAX_PALETTE_LENGTH);
    /* You must not free palette here, because png_set_PLTE only makes a link to
       the palette that you malloced.  Wait until you are about to destroy
       the png structure. */

libpng.txt

@@ -1,9 +1,9 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.9beta3 - November 23, 2000
+ libpng version 1.2.6beta1 - October 22, 2002
  Updated and distributed by Glenn Randers-Pehrson
  <randeg@alum.rpi.edu>
- Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ Copyright (c) 1998-2002 Glenn Randers-Pehrson
  For conditions of distribution and use, see copyright
  notice in png.h.
 
@@ -78,7 +78,9 @@ Libpng is thread safe, provided the threads are using different
 instances of the structures.  Each thread should have its own
 png_struct and png_info instances, and thus its own image.
 Libpng does not protect itself against two threads using the
-same instance of a structure.
+same instance of a structure.  Note: thread safety may be defeated
+by use of some of the MMX assembler code in pnggccrd.c, which is only
+compiled when the user defines PNG_THREAD_UNSAFE_OK.
 
 
 II. Structures
@@ -257,10 +259,11 @@ input stream. You must supply the function
            png_byte name[5];
            png_byte *data;
            png_size_t size;
-       /* Note that libpng has already taken care of the
-          CRC handling */
+       /* Note that libpng has already taken care of
+          the CRC handling */
 
-       /* put your code here.  Return one of the following: */
+       /* put your code here.  Return one of the
+          following: */
 
        return (-n); /* chunk had an error */
        return (0); /* did not recognize */
@@ -285,7 +288,8 @@ called after each row has been read, which you can use to control
 a progress meter or the like.  It's demonstrated in pngtest.c.
 You must supply a function
 
-    void read_row_callback(png_ptr ptr, png_uint_32 row, int pass);
+    void read_row_callback(png_ptr ptr, png_uint_32 row,
+       int pass);
     {
       /* put your code here */
     }
@@ -331,16 +335,23 @@ the entire image into memory, and (b) the input transformations
 you want to do are limited to the following set:
 
     PNG_TRANSFORM_IDENTITY      No transformation
-    PNG_TRANSFORM_STRIP_16      Strip 16-bit samples to 8 bits
+    PNG_TRANSFORM_STRIP_16      Strip 16-bit samples to
+                                8 bits
     PNG_TRANSFORM_STRIP_ALPHA   Discard the alpha channel
-    PNG_TRANSFORM_PACKING       Expand 1, 2 and 4-bit samples to bytes
-    PNG_TRANSFORM_PACKSWAP      Change order of packed pixels to LSB first
+    PNG_TRANSFORM_PACKING       Expand 1, 2 and 4-bit
+                                samples to bytes
+    PNG_TRANSFORM_PACKSWAP      Change order of packed
+                                pixels to LSB first
     PNG_TRANSFORM_EXPAND        Perform set_expand()
     PNG_TRANSFORM_INVERT_MONO   Invert monochrome images
-    PNG_TRANSFORM_SHIFT         Normalize pixels to the sBIT depth
-    PNG_TRANSFORM_BGR           Flip RGB to BGR, RGBA to BGRA
-    PNG_TRANSFORM_SWAP_ALPHA    Flip RGBA to ARGB or GA to AG
-    PNG_TRANSFORM_INVERT_ALPHA  Change alpha from opacity to transparency
+    PNG_TRANSFORM_SHIFT         Normalize pixels to the
+                                sBIT depth
+    PNG_TRANSFORM_BGR           Flip RGB to BGR, RGBA
+                                to BGRA
+    PNG_TRANSFORM_SWAP_ALPHA    Flip RGBA to ARGB or GA
+                                to AG
+    PNG_TRANSFORM_INVERT_ALPHA  Change alpha from opacity
+                                to transparency
     PNG_TRANSFORM_SWAP_ENDIAN   Byte-swap 16-bit samples
 
 (This excludes setting a background color, doing gamma transformation,
@@ -368,9 +379,11 @@ where row_pointers is an array of pointers to the pixel data for each row:
 If you know your image size and pixel size ahead of time, you can allocate
 row_pointers prior to calling png_read_png() with
 
-   row_pointers = png_malloc(png_ptr, height*sizeof(png_bytep));
+   row_pointers = png_malloc(png_ptr,
+      height*sizeof(png_bytep));
    for (int i=0; i<height, i++)
-      row_pointers[i]=png_malloc(png_ptr, width*pixel_size);
+      row_pointers[i]=png_malloc(png_ptr,
+         width*pixel_size);
    png_set_rows(png_ptr, info_ptr, &row_pointers);
 
 Alternatively you could allocate your image in one big block and define
@@ -400,7 +413,7 @@ in until png_read_end() has read the chunk data following the image.
 
     png_get_IHDR(png_ptr, info_ptr, &width, &height,
        &bit_depth, &color_type, &interlace_type,
-       &compression_type, &filter_type);
+       &compression_type, &filter_method);
 
     width          - holds the width of the image
                      in pixels (up to 2^31).
@@ -428,15 +441,18 @@ in until png_read_end() has read the chunk data following the image.
                      PNG_COLOR_MASK_COLOR
                      PNG_COLOR_MASK_ALPHA
 
-    filter_type    - (must be PNG_FILTER_TYPE_BASE
-                     for PNG 1.0)
+    filter_method  - (must be PNG_FILTER_TYPE_BASE
+                     for PNG 1.0, and can also be
+                     PNG_INTRAPIXEL_DIFFERENCING if
+                     the PNG datastream is embedded in
+                     a MNG-1.0 datastream)
     compression_type - (must be PNG_COMPRESSION_TYPE_BASE
                      for PNG 1.0)
     interlace_type - (PNG_INTERLACE_NONE or
                      PNG_INTERLACE_ADAM7)
     Any or all of interlace_type, compression_type, of
-                     filter_type can be NULL if you are not
-                     interested in their values.
+    filter_method can be NULL if you are
+    not interested in their values.
 
     channels = png_get_channels(png_ptr, info_ptr);
     channels       - number of channels of info for the
@@ -466,7 +482,7 @@ in until png_read_end() has read the chunk data following the image.
                          info_ptr);
     color_type       = png_get_color_type(png_ptr,
                          info_ptr);
-    filter_type      = png_get_filter_type(png_ptr,
+    filter_method    = png_get_filter_type(png_ptr,
                          info_ptr);
     compression_type = png_get_compression_type(png_ptr,
                          info_ptr);
@@ -499,14 +515,15 @@ into the info_ptr is returned for any complex types.
                      implies specific values of gAMA and
                      cHRM.
 
-    png_get_iCCP(png_ptr, info_ptr, &name, &compression_type,
-                      &profile, &proflen);
+    png_get_iCCP(png_ptr, info_ptr, &name,
+       &compression_type, &profile, &proflen);
     name            - The profile name.
-    compression     - The compression type; always PNG_COMPRESSION_TYPE_BASE
-                      for PNG 1.0.  You may give NULL to this argument
-                      to ignore it.
-    profile         - International Color Consortium color profile
-                      data. May contain NULs.
+    compression     - The compression type; always
+                      PNG_COMPRESSION_TYPE_BASE for PNG 1.0.
+                      You may give NULL to this argument to
+                      ignore it.
+    profile         - International Color Consortium color
+                      profile data. May contain NULs.
     proflen         - length of profile data in bytes.
 
     png_get_sBIT(png_ptr, info_ptr, &sig_bit);
@@ -560,23 +577,26 @@ into the info_ptr is returned for any complex types.
                  after decompression, 0 for tEXt/zTXt
     text_ptr[i].lang  - language of comment (empty
                          string for unknown).
-    text_ptr[i].translated_keyword  - keyword in UTF-8
+    text_ptr[i].lang_key  - keyword in UTF-8
                          (empty string for unknown).
-    num_text       - number of comments (same as num_comments;
-                     you can put NULL here to avoid the duplication)
-    Note while png_set_text() will accept text, language, and
-    translated keywords that can be NULL pointers, the structure
-    returned by png_get_text will always contain regular
-    zero-terminated C strings.  They might be empty strings but
-    they will never be NULL pointers.
+    num_text       - number of comments (same as
+                     num_comments; you can put NULL here
+                     to avoid the duplication)
+    Note while png_set_text() will accept text, language,
+    and translated keywords that can be NULL pointers, the
+    structure returned by png_get_text will always contain
+    regular zero-terminated C strings.  They might be
+    empty strings but they will never be NULL pointers.
 
-    num_spalettes = png_get_sPLT(png_ptr, info_ptr, &palette_ptr);
+    num_spalettes = png_get_sPLT(png_ptr, info_ptr,
+       &palette_ptr);
     palette_ptr    - array of palette structures holding
-                     contents of one or more sPLT chunks read.
+                     contents of one or more sPLT chunks
+                     read.
     num_spalettes  - number of sPLT chunks read.
 
     png_get_oFFs(png_ptr, info_ptr, &offset_x, &offset_y,
-                     &unit_type);
+       &unit_type);
     offset_x       - positive offset from the left edge
                      of the screen
     offset_y       - positive offset from the top edge
@@ -584,7 +604,7 @@ into the info_ptr is returned for any complex types.
     unit_type      - PNG_OFFSET_PIXEL, PNG_OFFSET_MICROMETER
 
     png_get_pHYs(png_ptr, info_ptr, &res_x, &res_y,
-                     &unit_type);
+       &unit_type);
     res_x          - pixels/unit physical resolution in
                      x direction
     res_y          - pixels/unit physical resolution in
@@ -592,47 +612,50 @@ into the info_ptr is returned for any complex types.
     unit_type      - PNG_RESOLUTION_UNKNOWN,
                      PNG_RESOLUTION_METER
 
-    png_get_sCAL(png_ptr, info_ptr, &unit, &width, &height)
+    png_get_sCAL(png_ptr, info_ptr, &unit, &width,
+       &height)
     unit        - physical scale units (an integer)
     width       - width of a pixel in physical scale units
     height      - height of a pixel in physical scale units
                  (width and height are doubles)
 
-    png_get_sCAL_s(png_ptr, info_ptr, &unit, &width, &height)
+    png_get_sCAL_s(png_ptr, info_ptr, &unit, &width,
+       &height)
     unit        - physical scale units (an integer)
     width       - width of a pixel in physical scale units
     height      - height of a pixel in physical scale units
                  (width and height are strings like "2.54")
 
-    num_unknown_chunks = png_get_unknown_chunks(png_ptr, info_ptr,
-                            &unknowns)
-    unknowns          - array of png_unknown_chunk structures holding
-                        unknown chunks
+    num_unknown_chunks = png_get_unknown_chunks(png_ptr,
+       info_ptr, &unknowns)
+    unknowns          - array of png_unknown_chunk
+                        structures holding unknown chunks
     unknowns[i].name  - name of unknown chunk
     unknowns[i].data  - data of unknown chunk
     unknowns[i].size  - size of unknown chunk's data
     unknowns[i].location - position of chunk in file
 
-    The value of "i" corresponds to the order in which the chunks were read
-    from the PNG file or inserted with the png_set_unknown_chunks() function.
+    The value of "i" corresponds to the order in which the
+    chunks were read from the PNG file or inserted with the
+    png_set_unknown_chunks() function.
 
 The data from the pHYs chunk can be retrieved in several convenient
 forms:
 
     res_x = png_get_x_pixels_per_meter(png_ptr,
-                  info_ptr)
+       info_ptr)
     res_y = png_get_y_pixels_per_meter(png_ptr,
-                  info_ptr)
+       info_ptr)
     res_x_and_y = png_get_pixels_per_meter(png_ptr,
-                  info_ptr)
+       info_ptr)
     res_x = png_get_x_pixels_per_inch(png_ptr,
-                  info_ptr)
+       info_ptr)
     res_y = png_get_y_pixels_per_inch(png_ptr,
-                  info_ptr)
+       info_ptr)
     res_x_and_y = png_get_pixels_per_inch(png_ptr,
-                  info_ptr)
+       info_ptr)
     aspect_ratio = png_get_pixel_aspect_ratio(png_ptr,
-                  info_ptr)
+       info_ptr)
 
    (Each of these returns 0 [signifying "unknown"] if
        the data is not present or if res_x is 0;
@@ -647,8 +670,8 @@ forms:
     y_offset = png_get_y_offset_inches(png_ptr, info_ptr);
 
    (Each of these returns 0 [signifying "unknown" if both
-       x and y are 0] if the data is not present or if the chunk
-       is present but the unit is the pixel)
+       x and y are 0] if the data is not present or if the
+       chunk is present but the unit is the pixel)
 
 For more information, see the png_info definition in png.h and the
 PNG specification for chunk contents.  Be careful with trusting
@@ -769,7 +792,7 @@ higher possible bit depth (e.g. from 5 bits/sample in the range [0,31] to
 convert the PNG pixel data back to the original bit depth of the image.
 This call reduces the pixels back down to the original bit depth:
 
-    png_color_16p sig_bit;
+    png_color_8p sig_bit;
 
     if (png_get_sBIT(png_ptr, info_ptr, &sig_bit))
         png_set_shift(png_ptr, sig_bit);
@@ -781,17 +804,18 @@ changes the storage of the pixels to blue, green, red:
         color_type == PNG_COLOR_TYPE_RGB_ALPHA)
         png_set_bgr(png_ptr);
 
-PNG files store RGB pixels packed into 3 bytes. This code expands them
-into 4 bytes for windowing systems that need them in this format:
+PNG files store RGB pixels packed into 3 or 6 bytes. This code expands them
+into 4 or 8 bytes for windowing systems that need them in this format:
 
-    if (bit_depth == 8 && color_type ==
-        PNG_COLOR_TYPE_RGB) png_set_filler(png_ptr,
-        filler, PNG_FILLER_BEFORE);
+    if (color_type == PNG_COLOR_TYPE_RGB)
+        png_set_filler(png_ptr, filler, PNG_FILLER_BEFORE);
 
 where "filler" is the 8 or 16-bit number to fill with, and the location is
 either PNG_FILLER_BEFORE or PNG_FILLER_AFTER, depending upon whether
 you want the filler before the RGB or after.  This transformation
-does not affect images that already have full alpha channels.
+does not affect images that already have full alpha channels.  To add an
+opaque alpha channel, use filler=0xff or 0xffff and PNG_FILLER_AFTER which
+will generate RGBA pixels.
 
 If you are reading an image with an alpha channel, and you need the
 data as ARGB instead of the normal PNG format RGBA:
@@ -861,8 +885,8 @@ which can be expressed with integers as
 The calculation is done in a linear colorspace, if the image gamma
 is known.
 
-If you have a grayscale and you are using png_set_expand_depth() or
-png_set_expand() to change to
+If you have a grayscale and you are using png_set_expand_depth(),
+png_set_expand(), or png_set_gray_to_rgb to change to truecolor or to
 a higher bit-depth, you must either supply the background color as a gray
 value at the original file bit-depth (need_expand = 1) or else supply the
 background color as an RGB triplet at the final, expanded bit depth
@@ -959,7 +983,7 @@ histogram, it may not do as good a job.
       if (png_get_valid(png_ptr, info_ptr,
          PNG_INFO_PLTE))
       {
-         png_color_16p histogram;
+         png_uint_16p histogram = NULL;
 
          png_get_hIST(png_ptr, info_ptr,
             &histogram);
@@ -981,7 +1005,13 @@ PNG files describe monochrome as black being zero and white being one.
 The following code will reverse this (make black be one and white be
 zero):
 
-   if (bit_depth == 1 && color_type == PNG_COLOR_GRAY)
+   if (bit_depth == 1 && color_type == PNG_COLOR_TYPE_GRAY)
+      png_set_invert_mono(png_ptr);
+
+This function can also be used to invert grayscale and gray-alpha images:
+
+   if (color_type == PNG_COLOR_TYPE_GRAY ||
+        color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
       png_set_invert_mono(png_ptr);
 
 PNG files store 16 bit pixels in network byte order (big-endian,
@@ -1182,7 +1212,7 @@ When you are done, you can free all memory allocated by libpng like this:
 It is also possible to individually free the info_ptr members that
 point to libpng-allocated storage with the following function:
 
-    png_free_data(png_ptr, info_ptr, mask, n)
+    png_free_data(png_ptr, info_ptr, mask, seq)
     mask - identifies data to be freed, a mask
            containing the logical OR of one or
            more of
@@ -1192,16 +1222,17 @@ point to libpng-allocated storage with the following function:
              PNG_FREE_SCAL, PNG_FREE_SPLT,
              PNG_FREE_TEXT, PNG_FREE_UNKN,
            or simply PNG_FREE_ALL
-    n    - sequence number of item to be freed
+    seq  - sequence number of item to be freed
            (-1 for all items)
 
 This function may be safely called when the relevant storage has
 already been freed, or has not yet been allocated, or was allocated
 by the user and not by libpng,  and will in those
-cases do nothing.  The "n" parameter is ignored if only one item
-of the selected data type, such as PLTE, is allowed.  If "n" is not
+cases do nothing.  The "seq" parameter is ignored if only one item
+of the selected data type, such as PLTE, is allowed.  If "seq" is not
 -1, and multiple items are allowed for the data type identified in
-the mask, such as text or sPLT, only the n'th item is freed.
+the mask, such as text or sPLT, only the n'th item in the structure
+is freed, where n is "seq".
 
 The default behavior is only to free data that was allocated internally
 by libpng.  This can be changed, so that libpng will not free the data,
@@ -1225,8 +1256,7 @@ or png_destroy_*() is supposed to free the data.  When the user assumes
 responsibility for libpng-allocated data, the application must use
 png_free() to free it, and when the user transfers responsibility to libpng
 for data that the user has allocated, the user must have used png_malloc()
-or png_zalloc() to allocate it (the png_zalloc() function is the same
-as png_malloc() except that it also zeroes the newly-allocated memory).
+or png_zalloc() to allocate it.
 
 If you allocated your row_pointers in a single block, as suggested above in
 the description of the high level read interface, you must not transfer
@@ -1520,7 +1550,8 @@ called after each row has been written, which you can use to control
 a progress meter or the like.  It's demonstrated in pngtest.c.
 You must supply a function
 
-    void write_row_callback(png_ptr, png_uint_32 row, int pass);
+    void write_row_callback(png_ptr, png_uint_32 row,
+       int pass);
     {
       /* put your code here */
     }
@@ -1539,16 +1570,18 @@ maximum possible compression at the expense of slower writing.  If you
 have no special needs in this area, let the library do what it wants by
 not calling this function at all, as it has been tuned to deliver a good
 speed/compression ratio. The second parameter to png_set_filter() is
-the filter method, for which the only valid value is '0' (as of the
-July 1999 PNG specification, version 1.2).  The third parameter is a
-flag that indicates which filter type(s) are to be tested for each
-scanline.  See the PNG specification for details on the specific filter
+the filter method, for which the only valid values are 0 (as of the
+July 1999 PNG specification, version 1.2) or 64 (if you are writing
+a PNG datastream that is to be embedded in a MNG datastream).  The third
+parameter is a flag that indicates which filter type(s) are to be tested
+for each scanline.  See the PNG specification for details on the specific filter
 types.
 
 
     /* turn on or off filtering, and/or choose
-       specific filters.  You can use either a single PNG_FILTER_VALUE_NAME
-       or the logical OR of one or more PNG_FILTER_NAME masks. */
+       specific filters.  You can use either a single
+       PNG_FILTER_VALUE_NAME or the logical OR of one
+       or more PNG_FILTER_NAME masks. */
     png_set_filter(png_ptr, 0,
        PNG_FILTER_NONE  | PNG_FILTER_VALUE_NONE |
        PNG_FILTER_SUB   | PNG_FILTER_VALUE_SUB  |
@@ -1563,6 +1596,9 @@ it should start out with all of the filters (to ensure that the previous
 row of pixels will be stored in case it's needed later), and then add
 and remove them after the start of compression.
 
+If you are writing a PNG datastream that is to be embedded in a MNG
+datastream, the second parameter can be either 0 or 64.
+
 The png_set_compression_*() functions interface to the zlib compression
 library, and should mostly be ignored unless you really know what you are
 doing.  The only generally useful call is png_set_compression_level()
@@ -1601,7 +1637,7 @@ Some of the more important parts of the png_info are:
 
     png_set_IHDR(png_ptr, info_ptr, width, height,
        bit_depth, color_type, interlace_type,
-       compression_type, filter_type)
+       compression_type, filter_method)
     width          - holds the width of the image
                      in pixels (up to 2^31).
     height         - holds the height of the image
@@ -1633,7 +1669,11 @@ Some of the more important parts of the png_info are:
                      PNG_INTERLACE_ADAM7
     compression_type - (must be
                      PNG_COMPRESSION_TYPE_DEFAULT)
-    filter_type    - (must be PNG_FILTER_TYPE_DEFAULT)
+    filter_method  - (must be PNG_FILTER_TYPE_DEFAULT
+                     or, if you are writing a PNG to
+                     be embedded in a MNG datastream,
+                     can also be
+                     PNG_INTRAPIXEL_DIFFERENCING)
 
     png_set_PLTE(png_ptr, info_ptr, palette,
        num_palette);
@@ -1677,11 +1717,12 @@ Some of the more important parts of the png_info are:
     png_set_iCCP(png_ptr, info_ptr, name, compression_type,
                       profile, proflen);
     name            - The profile name.
-    compression     - The compression type; always PNG_COMPRESSION_TYPE_BASE
-                      for PNG 1.0.  You may give NULL to this argument
-                      to ignore it.
-    profile         - International Color Consortium color profile
-                      data. May contain NULs.
+    compression     - The compression type; always
+                      PNG_COMPRESSION_TYPE_BASE for PNG 1.0.
+                      You may give NULL to this argument to
+                      ignore it.
+    profile         - International Color Consortium color
+                      profile data. May contain NULs.
     proflen         - length of profile data in bytes.
 
     png_set_sBIT(png_ptr, info_ptr, sig_bit);
@@ -1735,11 +1776,13 @@ Some of the more important parts of the png_info are:
                          or empty for unknown).
     num_text       - number of comments
 
-    png_set_sPLT(png_ptr, info_ptr, &palette_ptr, num_spalettes);
-    palette_ptr    - array of png_sPLT_struct structures to be
-                     added to the list of palettes in the info
-                     structure.
-    num_spalettes  - number of palette structures to be added.
+    png_set_sPLT(png_ptr, info_ptr, &palette_ptr,
+       num_spalettes);
+    palette_ptr    - array of png_sPLT_struct structures
+                     to be added to the list of palettes
+                     in the info structure.
+    num_spalettes  - number of palette structures to be
+                     added.
 
     png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y,
         unit_type);
@@ -1770,9 +1813,10 @@ Some of the more important parts of the png_info are:
     height      - height of a pixel in physical scale units
                  (width and height are strings like "2.54")
 
-    png_set_unknown_chunks(png_ptr, info_ptr, &unknowns, num_unknowns)
-    unknowns          - array of png_unknown_chunk structures holding
-                        unknown chunks
+    png_set_unknown_chunks(png_ptr, info_ptr, &unknowns,
+       num_unknowns)
+    unknowns          - array of png_unknown_chunk
+                        structures holding unknown chunks
     unknowns[i].name  - name of unknown chunk
     unknowns[i].data  - data of unknown chunk
     unknowns[i].size  - size of unknown chunk's data
@@ -1781,14 +1825,15 @@ Some of the more important parts of the png_info are:
                            PNG_HAVE_IHDR: before PLTE
                            PNG_HAVE_PLTE: before IDAT
                            PNG_AFTER_IDAT: after IDAT
-    The "location" member is set automatically according to
-    what part of the output file has already been written.
-    You can change its value after calling png_set_unknown_chunks()
-    as demonstrated in pngtest.c.  Within each of the "locations",
-    the chunks are sequenced according to their position in the
-    structure (that is, the value of "i", which is the order in which
-    the chunk was either read from the input file or defined with
-    png_set_unknown_chunks).
+
+The "location" member is set automatically according to
+what part of the output file has already been written.
+You can change its value after calling png_set_unknown_chunks()
+as demonstrated in pngtest.c.  Within each of the "locations",
+the chunks are sequenced according to their position in the
+structure (that is, the value of "i", which is the order in which
+the chunk was either read from the input file or defined with
+png_set_unknown_chunks).
 
 A quick word about text and num_text.  text is an array of png_text
 structures.  num_text is the number of valid structures in the array.
@@ -1889,12 +1934,17 @@ transformations are permitted, enabled by the following masks.
 
     PNG_TRANSFORM_IDENTITY      No transformation
     PNG_TRANSFORM_PACKING       Pack 1, 2 and 4-bit samples
-    PNG_TRANSFORM_PACKSWAP      Change order of packed pixels to LSB first
+    PNG_TRANSFORM_PACKSWAP      Change order of packed
+                                pixels to LSB first
     PNG_TRANSFORM_INVERT_MONO   Invert monochrome images
-    PNG_TRANSFORM_SHIFT         Normalize pixels to the sBIT depth
-    PNG_TRANSFORM_BGR           Flip RGB to BGR, RGBA to BGRA
-    PNG_TRANSFORM_SWAP_ALPHA    Flip RGBA to ARGB or GA to AG
-    PNG_TRANSFORM_INVERT_ALPHA  Change alpha from opacity to transparency
+    PNG_TRANSFORM_SHIFT         Normalize pixels to the
+                                sBIT depth
+    PNG_TRANSFORM_BGR           Flip RGB to BGR, RGBA
+                                to BGRA
+    PNG_TRANSFORM_SWAP_ALPHA    Flip RGBA to ARGB or GA
+                                to AG
+    PNG_TRANSFORM_INVERT_ALPHA  Change alpha from opacity
+                                to transparency
     PNG_TRANSFORM_SWAP_ENDIAN   Byte-swap 16-bit samples
     PNG_TRANSFORM_STRIP_FILLER  Strip out filler bytes.
 
@@ -2158,7 +2208,7 @@ When you are done, you can free all memory used by libpng like this:
 It is also possible to individually free the info_ptr members that
 point to libpng-allocated storage with the following function:
 
-    png_free_data(png_ptr, info_ptr, mask, n)
+    png_free_data(png_ptr, info_ptr, mask, seq)
     mask  - identifies data to be freed, a mask
             containing the logical OR of one or
             more of
@@ -2168,16 +2218,17 @@ point to libpng-allocated storage with the following function:
               PNG_FREE_SCAL, PNG_FREE_SPLT,
               PNG_FREE_TEXT, PNG_FREE_UNKN,
             or simply PNG_FREE_ALL
-    n     - sequence number of item to be freed
+    seq   - sequence number of item to be freed
             (-1 for all items)
 
 This function may be safely called when the relevant storage has
 already been freed, or has not yet been allocated, or was allocated
 by the user  and not by libpng,  and will in those
-cases do nothing.  The "n" parameter is ignored if only one item
-of the selected data type, such as PLTE, is allowed.  If "n" is not
+cases do nothing.  The "seq" parameter is ignored if only one item
+of the selected data type, such as PLTE, is allowed.  If "seq" is not
 -1, and multiple items are allowed for the data type identified in
-the mask, such as text or sPLT, only the n'th item is freed.
+the mask, such as text or sPLT, only the n'th item in the structure
+is freed, where n is "seq".
 
 If you allocated data such as a palette that you passed
 in to libpng with png_set_*, you must not free it until just before the call to
@@ -2231,36 +2282,49 @@ For a more compact example of writing a PNG image, see the file example.c.
 
 V. Modifying/Customizing libpng:
 
-There are two issues here.  The first is changing how libpng does
+There are three issues here.  The first is changing how libpng does
 standard things like memory allocation, input/output, and error handling.
 The second deals with more complicated things like adding new chunks,
 adding new transformations, and generally changing how libpng works.
+Both of those are compile-time issues; that is, they are generally
+determined at the time the code is written, and there is rarely a need
+to provide the user with a means of changing them.  The third is a
+run-time issue:  choosing between and/or tuning one or more alternate
+versions of computationally intensive routines; specifically, optimized
+assembly-language (and therefore compiler- and platform-dependent)
+versions.
+
+Memory allocation, input/output, and error handling
 
 All of the memory allocation, input/output, and error handling in libpng
-goes through callbacks that are user settable.  The default routines are
+goes through callbacks that are user-settable.  The default routines are
 in pngmem.c, pngrio.c, pngwio.c, and pngerror.c, respectively.  To change
 these functions, call the appropriate png_set_*_fn() function.
 
-Memory allocation is done through the functions png_malloc(), png_zalloc(),
+Memory allocation is done through the functions png_malloc()
 and png_free().  These currently just call the standard C functions.  If
 your pointers can't access more then 64K at a time, you will want to set
 MAXSEG_64K in zlib.h.  Since it is unlikely that the method of handling
 memory allocation on a platform will change between applications, these
 functions must be modified in the library at compile time.  If you prefer
 to use a different method of allocating and freeing data, you can use
+png_create_read_struct_2() or png_create_write_struct_2() to register
+your own functions as described above.
 
-    png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
-      malloc_fn, png_free_ptr free_fn)
-
-This function also provides a void pointer that can be retrieved via
+These functions also provide a void pointer that can be retrieved via
 
     mem_ptr=png_get_mem_ptr(png_ptr);
 
 Your replacement memory functions must have prototypes as follows:
 
-    png_voidp malloc_fn(png_structp png_ptr, png_uint_32 size);
+    png_voidp malloc_fn(png_structp png_ptr,
+       png_size_t size);
     void free_fn(png_structp png_ptr, png_voidp ptr);
 
+Your malloc_fn() should return NULL in case of failure.  The png_malloc()
+function will call png_error() if it receives a NULL from the system
+memory allocator or from your replacement malloc_fn().
+
 Input/Output in libpng is done through png_read() and png_write(),
 which currently just call fread() and fwrite().  The FILE * is stored in
 png_struct and is initialized via png_init_io().  If you wish to change
@@ -2283,9 +2347,9 @@ png_get_io_ptr().  For example:
 The replacement I/O functions must have prototypes as follows:
 
     void user_read_data(png_structp png_ptr,
-        png_bytep data, png_uint_32 length);
+        png_bytep data, png_size_t length);
     void user_write_data(png_structp png_ptr,
-        png_bytep data, png_uint_32 length);
+        png_bytep data, png_size_t length);
     void user_flush_data(png_structp png_ptr);
 
 Supplying NULL for the read, write, or flush functions sets them back
@@ -2420,6 +2484,10 @@ compression level by calling:
 Another useful one is to reduce the memory level used by the library.
 The memory level defaults to 8, but it can be lowered if you are
 short on memory (running DOS, for example, where you only have 640K).
+Note that the memory level does have an effect on compression; among
+other things, lower levels will result in sections of incompressible
+data being emitted in smaller stored blocks, with a correspondingly
+larger relative overhead of up to 15% in the worst case.
 
     png_set_compression_mem_level(png_ptr, level);
 
@@ -2454,34 +2522,39 @@ to turn filtering on and off, respectively.
 Individual filter types are PNG_FILTER_NONE, PNG_FILTER_SUB,
 PNG_FILTER_UP, PNG_FILTER_AVG, PNG_FILTER_PAETH, which can be bitwise
 ORed together with '|' to specify one or more filters to use.
-These filters are described in more detail in the PNG specification.  If
-you intend to change the filter type during the course of writing
+These filters are described in more detail in the PNG specification.
+If you intend to change the filter type during the course of writing
 the image, you should start with flags set for all of the filters
 you intend to use so that libpng can initialize its internal
-structures appropriately for all of the filter types.
+structures appropriately for all of the filter types.  (Note that this
+means the first row must always be adaptively filtered, because libpng
+currently does not allocate the filter buffers until png_write_row()
+is called for the first time.)
 
     filters = PNG_FILTER_NONE | PNG_FILTER_SUB
               PNG_FILTER_UP | PNG_FILTER_AVE |
               PNG_FILTER_PAETH | PNG_ALL_FILTERS;
-    or
-    filters = one of PNG_FILTER_VALUE_NONE,
-              PNG_FILTER_VALUE_SUB, PNG_FILTER_VALUE_UP,
-              PNG_FILTER_VALUE_AVE, PNG_FILTER_VALUE_PAETH
 
     png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE,
        filters);
+              The second parameter can also be
+              PNG_INTRAPIXEL_DIFFERENCING if you are
+              writing a PNG to be embedded in a MNG
+              datastream.  This parameter must be the
+              same as the value of filter_method used
+              in png_set_IHDR().
 
 It is also possible to influence how libpng chooses from among the
-available filters.  This is done in two ways - by telling it how
-important it is to keep the same filter for successive rows, and
-by telling it the relative computational costs of the filters.
+available filters.  This is done in one or both of two ways - by
+telling it how important it is to keep the same filter for successive
+rows, and by telling it the relative computational costs of the filters.
 
     double weights[3] = {1.5, 1.3, 1.1},
        costs[PNG_FILTER_VALUE_LAST] =
        {1.0, 1.3, 1.3, 1.5, 1.7};
 
-    png_set_filter_selection(png_ptr,
-       PNG_FILTER_SELECTION_WEIGHTED, 3,
+    png_set_filter_heuristics(png_ptr,
+       PNG_FILTER_HEURISTIC_WEIGHTED, 3,
        weights, costs);
 
 The weights are multiplying factors that indicate to libpng that the
@@ -2581,7 +2654,152 @@ When PNG_DEBUG = 1, the macros are defined, but only png_debug statements
 having level = 0 will be printed.  There aren't any such statements in
 this version of libpng, but if you insert some they will be printed.
 
-VI.  Changes to Libpng from version 0.88
+VI.  Runtime optimization
+
+A new feature in libpng 1.2.0 is the ability to dynamically switch between
+standard and optimized versions of some routines.  Currently these are
+limited to three computationally intensive tasks when reading PNG files:
+decoding row filters, expanding interlacing, and combining interlaced or
+transparent row data with previous row data.  Currently the optimized
+versions are available only for x86 (Intel, AMD, etc.) platforms with
+MMX support, though this may change in future versions.  (For example,
+the non-MMX assembler optimizations for zlib might become similarly
+runtime-selectable in future releases, in which case libpng could be
+extended to support them.  Alternatively, the compile-time choice of
+floating-point versus integer routines for gamma correction might become
+runtime-selectable.)
+
+Because such optimizations tend to be very platform- and compiler-dependent,
+both in how they are written and in how they perform, the new runtime code
+in libpng has been written to allow programs to query, enable, and disable
+either specific optimizations or all such optimizations.  For example, to
+enable all possible optimizations (bearing in mind that some "optimizations"
+may actually run more slowly in rare cases):
+
+    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
+       png_uint_32 mask, flags;
+
+       flags = png_get_asm_flags(png_ptr);
+       mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
+       png_set_asm_flags(png_ptr, flags | mask);
+    #endif
+
+To enable only optimizations relevant to reading PNGs, use PNG_SELECT_READ
+by itself when calling png_get_asm_flagmask(); similarly for optimizing
+only writing.  To disable all optimizations:
+
+    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
+       flags = png_get_asm_flags(png_ptr);
+       mask = png_get_asm_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE);
+       png_set_asm_flags(png_ptr, flags & ~mask);
+    #endif
+
+To enable or disable only MMX-related features, use png_get_mmx_flagmask()
+in place of png_get_asm_flagmask().  The mmx version takes one additional
+parameter:
+
+    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
+       int selection = PNG_SELECT_READ | PNG_SELECT_WRITE;
+       int compilerID;
+
+       mask = png_get_mmx_flagmask(selection, &compilerID);
+    #endif
+
+On return, compilerID will indicate which version of the MMX assembler
+optimizations was compiled.  Currently two flavors exist:  Microsoft
+Visual C++ (compilerID == 1) and GNU C (a.k.a. gcc/gas, compilerID == 2).
+On non-x86 platforms or on systems compiled without MMX optimizations, a
+value of -1 is used.
+
+Note that both png_get_asm_flagmask() and png_get_mmx_flagmask() return
+all valid, settable optimization bits for the version of the library that's
+currently in use.  In the case of shared (dynamically linked) libraries,
+this may include optimizations that did not exist at the time the code was
+written and compiled.  It is also possible, of course, to enable only known,
+specific optimizations; for example:
+
+    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
+       flags = PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  \
+             | PNG_ASM_FLAG_MMX_READ_INTERLACE    \
+             | PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
+             | PNG_ASM_FLAG_MMX_READ_FILTER_UP    \
+             | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
+             | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
+       png_set_asm_flags(png_ptr, flags);
+    #endif
+
+This method would enable only the MMX read-optimizations available at the
+time of libpng 1.2.0's release, regardless of whether a later version of
+the DLL were actually being used.  (Also note that these functions did not
+exist in versions older than 1.2.0, so any attempt to run a dynamically
+linked app on such an older version would fail.)
+
+To determine whether the processor supports MMX instructions at all, use
+the png_mmx_support() function:
+
+    #if defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
+       mmxsupport = png_mmx_support();
+    #endif
+
+It returns -1 if MMX support is not compiled into libpng, 0 if MMX code
+is compiled but MMX is not supported by the processor, or 1 if MMX support
+is fully available.  Note that png_mmx_support(), png_get_mmx_flagmask(),
+and png_get_asm_flagmask() all may be called without allocating and ini-
+tializing any PNG structures (for example, as part of a usage screen or
+"about" box).
+
+The following code can be used to prevent an application from using the
+thread_unsafe features, even if libpng was built with PNG_THREAD_UNSAFE_OK
+defined:
+
+#if defined(PNG_USE_PNGGCCRD) && defined(PNG_ASSEMBLER_CODE_SUPPORTED) \
+  && defined(PNG_THREAD_UNSAFE_OK)
+    /* Disable thread-unsafe features of pnggccrd */
+    if (png_access_version() >= 10200)
+    {
+      png_uint_32 mmx_disable_mask = 0;
+      png_uint_32 asm_flags;
+
+      mmx_disable_mask |= ( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  \
+                          | PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
+                          | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
+                          | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH );
+      asm_flags = png_get_asm_flags(png_ptr);
+      png_set_asm_flags(png_ptr, asm_flags & ~mmx_disable_mask);
+    }
+#endif
+
+For more extensive examples of runtime querying, enabling and disabling
+of optimized features, see contrib/gregbook/readpng2.c in the libpng
+source-code distribution.
+
+
+VII.  MNG support
+
+The MNG specification (available at http://www.libpng.org/pub/mng) allows
+certain extensions to PNG for PNG images that are embedded in MNG datastreams.
+Libpng can support some of these extensions.  To enable them, use the
+png_permit_mng_features() function:
+
+   feature_set = png_permit_mng_features(png_ptr, mask)
+   mask is a png_uint_32 containing the logical OR of the
+        features you want to enable.  These include
+        PNG_FLAG_MNG_EMPTY_PLTE
+        PNG_FLAG_MNG_FILTER_64
+        PNG_ALL_MNG_FEATURES
+   feature_set is a png_32_uint that is the logical AND of
+      your mask with the set of MNG features that is
+      supported by the version of libpng that you are using.
+
+It is an error to use this function when reading or writing a standalone
+PNG file with the PNG 8-byte signature.  The PNG datastream must be wrapped
+in a MNG datastream.  As a minimum, it must have the MNG 8-byte signature
+and the MHDR and MEND chunks.  Libpng does not provide support for these
+or any other MNG chunks; your application must provide its own support for
+them.  You may wish to consider using libmng (available at
+http://www.libmng.com) instead.
+
+VIII.  Changes to Libpng from version 0.88
 
 It should be noted that versions of libpng later than 0.96 are not
 distributed by the original libpng author, Guy Schalnat, nor by
@@ -2591,7 +2809,7 @@ of the original PNG Group, Glenn Randers-Pehrson.  Guy and Andreas are
 still alive and well, but they have moved on to other things.
 
 The old libpng functions png_read_init(), png_write_init(),
-png_info_init(), png_read_destroy(), and png_write_destory() have been
+png_info_init(), png_read_destroy(), and png_write_destroy() have been
 moved to PNG_INTERNAL in version 0.95 to discourage their use.  These
 functions will be removed from libpng version 2.0.0.
 
@@ -2630,15 +2848,15 @@ application:
 
    png_uint_32 application_vn = PNG_LIBPNG_VER;
 
-VII. Y2K Compliance in libpng
+IX. Y2K Compliance in libpng
 
-November 23, 2000
+October 22, 2002
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.0.9beta3 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.6beta1 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
@@ -2656,7 +2874,8 @@ There are seven time-related functions:
 
     png_convert_to_rfc_1123() in png.c
       (formerly png_convert_to_rfc_1152() in error)
-    png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c
+    png_convert_from_struct_tm() in pngwrite.c, called
+      in pngwrite.c
     png_convert_from_time_t() in pngwrite.c
     png_get_tIME() in pngget.c
     png_handle_tIME() in pngrutil.c, called in pngread.c

libpngpf.3

@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "November 23, 2000"
+.TH LIBPNGPF 3 "October 22, 2002"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9beta3
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.6beta1
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
@@ -47,11 +47,11 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9beta3
 
 \fI\fB
 
-\fBpng_voidp png_create_struct (int \fP\fItype\fP\fB, png_malloc_ptr \fImalloc_fn\fP\fB);\fP
+\fBpng_voidp png_create_struct (int \fItype\fP\fB);\fP
 
 \fI\fB
 
-\fBpng_voidp png_create_struct_2 (int \fItype\fP\fB);\fP
+\fBpng_voidp png_create_struct_2 (int \fP\fItype\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_voidp \fImem_ptr\fP\fB);\fP
 
 \fI\fB
 
@@ -63,7 +63,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9beta3
 
 \fI\fB
 
-\fBvoid png_destroy_struct_2 (png_voidp \fP\fIstruct_ptr\fP\fB, png_free_ptr \fIfree_fn\fP\fB);\fP
+\fBvoid png_destroy_struct_2 (png_voidp \fP\fIstruct_ptr\fP\fB, png_free_ptr \fP\fIfree_fn\fP\fB, png_voidp \fImem_ptr\fP\fB);\fP
 
 \fI\fB
 
@@ -191,10 +191,6 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9beta3
 
 \fI\fB
 
-\fBint png_handle_as_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIchunk_name\fP\fB);\fP
-
-\fI\fB
-
 \fBvoid png_handle_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
 
 \fI\fB
@@ -283,6 +279,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9beta3
 
 \fI\fB
 
+\fBvoid png_init_mmx_flags (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
 \fBvoid png_init_read_transformations (png_structp \fIpng_ptr\fP\fB);\fP
 
 \fI\fB
@@ -411,7 +411,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9beta3
 
 \fI\fB
 
-\fBvoid png_write_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_color_16p \fP\fIvalues\fP\fB, int \fIcolor_type\fP\fB);\fP
+\fBint png_set_text_2 (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fItext_ptr\fP\fB, int \fInum_text)\fP\fB);\fP
 
 \fI\fB
 
@@ -425,6 +425,8 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9beta3
 
 \fBvoid png_write_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
 
+\fI\fB
+
 \fBvoid png_write_filtered_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIfiltered_row\fP\fB);\fP
 
 \fI\fB
@@ -539,7 +541,8 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9beta3
 
 .SH DESCRIPTION
 The functions listed above are used privately by libpng
-and are not recommended for use by applications.  They
+and are not recommended for use by applications.  They are
+not "exported" to applications using shared libraries.  They
 are listed alphabetically here as an aid to libpng maintainers.
 See png.h for more information on these functions.
 

png.5

@@ -1,4 +1,4 @@
-.TH PNG 5 "November 23, 2000"
+.TH PNG 5 "October 22, 2002"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
@@ -53,7 +53,7 @@ Thomas Boutell and others (png-list@ccrc.wustl.edu).
 The PNG-1.2 specification is copyright (c) 1999 Glenn Randers-Pehrson.
 See the specification for conditions of use and distribution.
 .LP
-The PNG-1.0 specification is copyright (c) 1996 Massachussets Institute of
+The PNG-1.0 specification is copyright (c) 1996 Massachusetts Institute of
 Technology.  See the specification for conditions of use and distribution.
 .LP
 .\" end of man page

png.c

@@ -1,8 +1,8 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * libpng version 1.0.9beta3 - November 23, 2000
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * libpng version 1.2.6beta1 - October 22, 2002
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -13,14 +13,14 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_9beta3 Your_png_h_is_not_version_1_0_9beta3;
+typedef version_1_2_6beta1 Your_png_h_is_not_version_1_2_6beta1;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.  */
 
 #ifdef PNG_USE_GLOBAL_ARRAYS
 /* png_libpng_ver was changed to a function in version 1.0.5c */
-const char png_libpng_ver[18] = "1.0.9beta3";
+const char png_libpng_ver[18] = "1.2.6beta1";
 
 /* png_sig was changed to a function in version 1.0.5c */
 /* Place to hold the signature string for a PNG file. */
@@ -135,13 +135,26 @@ png_check_sig(png_bytep sig, int num)
 }
 
 /* Function to allocate memory for zlib and clear it to 0. */
+#ifdef PNG_1_0_X
 voidpf PNGAPI
+#else
+voidpf /* private */
+#endif
 png_zalloc(voidpf png_ptr, uInt items, uInt size)
 {
    png_uint_32 num_bytes = (png_uint_32)items * size;
-   png_voidp ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes);
+   png_voidp ptr;
+   png_structp p=png_ptr;
+   png_uint_32 save_flags=p->flags;
+
+   p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
+   ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes);
+   p->flags=save_flags;
 
 #ifndef PNG_NO_ZALLOC_ZERO
+   if (ptr == NULL)
+       return ((voidpf)ptr);
+
    if (num_bytes > (png_uint_32)0x8000L)
    {
       png_memset(ptr, 0, (png_size_t)0x8000L);
@@ -157,7 +170,11 @@ png_zalloc(voidpf png_ptr, uInt items, uInt size)
 }
 
 /* function to free memory for zlib */
+#ifdef PNG_1_0_X
 void PNGAPI
+#else
+void /* private */
+#endif
 png_zfree(voidpf png_ptr, voidpf ptr)
 {
    png_free((png_structp)png_ptr, (png_voidp)ptr);
@@ -212,14 +229,13 @@ png_create_info_struct(png_structp png_ptr)
    png_debug(1, "in png_create_info_struct\n");
    if(png_ptr == NULL) return (NULL);
 #ifdef PNG_USER_MEM_SUPPORTED
-   if ((info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
-      png_ptr->malloc_fn)) != NULL)
+   info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
+      png_ptr->malloc_fn, png_ptr->mem_ptr);
 #else
-   if ((info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO)) != NULL)
+   info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
 #endif
-   {
-      png_info_init(info_ptr);
-   }
+   if (info_ptr != NULL)
+      png_info_init_3(&info_ptr, sizeof(png_info));
 
    return (info_ptr);
 }
@@ -243,11 +259,12 @@ png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
       png_info_destroy(png_ptr, info_ptr);
 
 #ifdef PNG_USER_MEM_SUPPORTED
-      png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn);
+      png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn,
+          png_ptr->mem_ptr);
 #else
       png_destroy_struct((png_voidp)info_ptr);
 #endif
-      *info_ptr_ptr = (png_infop)NULL;
+      *info_ptr_ptr = NULL;
    }
 }
 
@@ -255,10 +272,28 @@ png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
  * and applications using it are urged to use png_create_info_struct()
  * instead.
  */
+#undef png_info_init
 void PNGAPI
 png_info_init(png_infop info_ptr)
 {
-   png_debug(1, "in png_info_init\n");
+   /* We only come here via pre-1.0.12-compiled applications */
+   png_info_init_3(&info_ptr, 0);
+}
+
+void PNGAPI
+png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
+{
+   png_infop info_ptr = *ptr_ptr;
+
+   png_debug(1, "in png_info_init_3\n");
+
+   if(sizeof(png_info) > png_info_struct_size)
+     {
+       png_destroy_struct(info_ptr);
+       info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
+       *ptr_ptr = info_ptr;
+     }
+
    /* set everything to 0 */
    png_memset(info_ptr, 0, sizeof (png_info));
 }
@@ -282,7 +317,8 @@ png_data_freer(png_structp png_ptr, png_infop info_ptr,
 #endif
 
 void PNGAPI
-png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, int num)
+png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
+   int num)
 {
    png_debug(1, "in png_free_data\n");
    if (png_ptr == NULL || info_ptr == NULL)
@@ -326,6 +362,9 @@ if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS))
 {
     png_free(png_ptr, info_ptr->trans);
     info_ptr->valid &= ~PNG_INFO_tRNS;
+#ifndef PNG_FREE_ME_SUPPORTED
+    png_ptr->flags &= ~PNG_FLAG_FREE_TRNS;
+#endif
     info_ptr->trans = NULL;
 }
 #endif
@@ -469,6 +508,9 @@ if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST))
     png_free(png_ptr, info_ptr->hist);
     info_ptr->hist = NULL;
     info_ptr->valid &= ~PNG_INFO_hIST;
+#ifndef PNG_FREE_ME_SUPPORTED
+    png_ptr->flags &= ~PNG_FLAG_FREE_HIST;
+#endif
 }
 #endif
 
@@ -482,6 +524,9 @@ if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE))
     png_zfree(png_ptr, info_ptr->palette);
     info_ptr->palette = NULL;
     info_ptr->valid &= ~PNG_INFO_PLTE;
+#ifndef PNG_FREE_ME_SUPPORTED
+    png_ptr->flags &= ~PNG_FLAG_FREE_PLTE;
+#endif
     info_ptr->num_palette = 0;
 }
 
@@ -536,7 +581,7 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
    }
 #endif
 
-   png_info_init(info_ptr);
+   png_info_init_3(&info_ptr, sizeof(png_info));
 }
 
 /* This function returns a pointer to the io_ptr associated with the user
@@ -582,31 +627,31 @@ png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
    }
 
 #if defined(_WIN32_WCE)
-  {
-     wchar_t time_buf[29];
-     wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"),
-              ptime->day % 32, short_months[(ptime->month - 1) % 12],
-              ptime->year, ptime->hour % 24, ptime->minute % 60,
-              ptime->second % 61);
-     WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29,
-        NULL, NULL);
-  }
+   {
+      wchar_t time_buf[29];
+      wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"),
+          ptime->day % 32, short_months[(ptime->month - 1) % 12],
+        ptime->year, ptime->hour % 24, ptime->minute % 60,
+          ptime->second % 61);
+      WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29,
+          NULL, NULL);
+   }
 #else
 #ifdef USE_FAR_KEYWORD
    {
       char near_time_buf[29];
       sprintf(near_time_buf, "%d %s %d %02d:%02d:%02d +0000",
-               ptime->day % 32, short_months[(ptime->month - 1) % 12],
-               ptime->year, ptime->hour % 24, ptime->minute % 60,
-               ptime->second % 61);
+          ptime->day % 32, short_months[(ptime->month - 1) % 12],
+          ptime->year, ptime->hour % 24, ptime->minute % 60,
+          ptime->second % 61);
       png_memcpy(png_ptr->time_buffer, near_time_buf,
-      29*sizeof(char));
+          29*sizeof(char));
    }
 #else
    sprintf(png_ptr->time_buffer, "%d %s %d %02d:%02d:%02d +0000",
-               ptime->day % 32, short_months[(ptime->month - 1) % 12],
-               ptime->year, ptime->hour % 24, ptime->minute % 60,
-               ptime->second % 61);
+       ptime->day % 32, short_months[(ptime->month - 1) % 12],
+       ptime->year, ptime->hour % 24, ptime->minute % 60,
+       ptime->second % 61);
 #endif
 #endif /* _WIN32_WCE */
    return ((png_charp)png_ptr->time_buffer);
@@ -626,10 +671,10 @@ png_charp PNGAPI
 png_get_copyright(png_structp png_ptr)
 {
    if (png_ptr != NULL || png_ptr == NULL)  /* silence compiler warning */
-   return ((png_charp) "\n libpng version 1.0.9beta3 - November 23, 2000\n\
-   Copyright (c) 1998-2000 Glenn Randers-Pehrson\n\
-   Copyright (c) 1996, 1997 Andreas Dilger\n\
-   Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.\n");
+   return ((png_charp) "\n libpng version 1.2.6beta1 - October 22, 2002\n\
+   Copyright (c) 1998-2002 Glenn Randers-Pehrson\n\
+   Copyright (c) 1996-1997 Andreas Dilger\n\
+   Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
    return ((png_charp) "");
 }
 
@@ -644,8 +689,8 @@ png_get_libpng_ver(png_structp png_ptr)
 {
    /* Version of *.c files used when building libpng */
    if(png_ptr != NULL) /* silence compiler warning about unused png_ptr */
-      return((png_charp) "1.0.9beta3");
-   return((png_charp) "1.0.9beta3");
+      return((png_charp) "1.2.6beta1");
+   return((png_charp) "1.2.6beta1");
 }
 
 png_charp PNGAPI
@@ -695,5 +740,66 @@ png_uint_32 PNGAPI
 png_access_version_number(void)
 {
    /* Version of *.c files used when building libpng */
-   return((png_uint_32) 10009L);
+   return((png_uint_32) 10206L);
 }
+
+
+#if !defined(PNG_1_0_X)
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+    /* GRR:  could add this:   && defined(PNG_MMX_CODE_SUPPORTED) */
+/* this INTERNAL function was added to libpng 1.2.0 */
+void /* PRIVATE */
+png_init_mmx_flags (png_structp png_ptr)
+{
+    png_ptr->mmx_rowbytes_threshold = 0;
+    png_ptr->mmx_bitdepth_threshold = 0;
+
+#  if (defined(PNG_USE_PNGVCRD) || defined(PNG_USE_PNGGCCRD))
+
+    png_ptr->asm_flags |= PNG_ASM_FLAG_MMX_SUPPORT_COMPILED;
+
+    if (png_mmx_support() > 0) {
+        png_ptr->asm_flags |= PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
+#    ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
+                              | PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
+#    endif
+#    ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
+                              | PNG_ASM_FLAG_MMX_READ_INTERLACE
+#    endif
+#    ifndef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
+                              ;
+#    else
+                              | PNG_ASM_FLAG_MMX_READ_FILTER_SUB
+                              | PNG_ASM_FLAG_MMX_READ_FILTER_UP
+                              | PNG_ASM_FLAG_MMX_READ_FILTER_AVG
+                              | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
+
+        png_ptr->mmx_rowbytes_threshold = PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT;
+        png_ptr->mmx_bitdepth_threshold = PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT;
+#    endif
+    } else {
+        png_ptr->asm_flags &= ~( PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
+                               | PNG_MMX_READ_FLAGS
+                               | PNG_MMX_WRITE_FLAGS );
+    }
+
+#  else /* !((PNGVCRD || PNGGCCRD) && PNG_ASSEMBLER_CODE_SUPPORTED)) */
+
+    /* clear all MMX flags; no support is compiled in */
+    png_ptr->asm_flags &= ~( PNG_MMX_FLAGS );
+
+#  endif /* ?(PNGVCRD || PNGGCCRD) */
+}
+
+#endif /* !(PNG_ASSEMBLER_CODE_SUPPORTED) */
+
+/* this function was added to libpng 1.2.0 */
+#if !defined(PNG_USE_PNGGCCRD) && \
+    !(defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGVCRD))
+int PNGAPI
+png_mmx_support(void)
+{
+    return -1;
+}
+#endif
+#endif /* PNG_1_0_X */

pngasmrd.h

@@ -1,39 +1,11 @@
 /* pngasmrd.h - assembler version of utilities to read a PNG file
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 2002 Glenn Randers-Pehrson
  *
  */
 
-#ifndef PNGASMRD_H
-#define PNGASMRD_H
-
-#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
-
-/* Set this in the makefile for VC++ on Pentium, not in pngconf.h */
-/* Platform must be Pentium.  Makefile must assemble and load pngvcrd.c .
- * MMX will be detected at run time and used if present.
+/* This file is obsolete in libpng-1.0.9 and later; its contents now appear
+ * at the end of pngconf.h.
  */
-#ifdef PNG_USE_PNGVCRD
-#  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
-#  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
-#  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
-#endif
-
-/* Set this in the makefile for gcc/as on Pentium, not in pngconf.h */
-/* Platform must be Pentium.  Makefile must assemble and load pnggccrd.c .
- * MMX will be detected at run time and used if present.
- */
-#ifdef PNG_USE_PNGGCCRD
-#  define PNG_HAVE_ASSEMBLER_COMBINE_ROW
-#  define PNG_HAVE_ASSEMBLER_READ_INTERLACE
-#  define PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
-#endif
-/*
-    GRR notes:
-      - see pnggccrd.c for info about what is currently enabled
- */
-
-#endif
-#endif /* PNGASMRD_H */

pngerror.c

@@ -1,9 +1,9 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -18,10 +18,10 @@
 
 static void /* PRIVATE */
 png_default_error PNGARG((png_structp png_ptr,
-                                      png_const_charp message));
+  png_const_charp error_message));
 static void /* PRIVATE */
 png_default_warning PNGARG((png_structp png_ptr,
-                                        png_const_charp message));
+  png_const_charp warning_message));
 
 /* This function is called whenever there is a fatal error.  This function
  * should not be changed.  If there is a need to handle errors differently,
@@ -29,14 +29,46 @@ png_default_warning PNGARG((png_structp png_ptr,
  * to replace the error function at run-time.
  */
 void PNGAPI
-png_error(png_structp png_ptr, png_const_charp message)
+png_error(png_structp png_ptr, png_const_charp error_message)
 {
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   char msg[16];
+   if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+   {
+     int offset = 0;
+     if (*error_message == '#')
+     {
+         for (offset=1; offset<15; offset++)
+            if (*(error_message+offset) == ' ')
+                break;
+         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+         {
+            int i;
+            for (i=0; i<offset-1; i++)
+               msg[i]=error_message[i+1];
+            msg[i]='\0';
+            error_message=msg;
+         }
+         else
+            error_message+=offset;
+     }
+     else
+     {
+         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+         {
+            msg[0]='0';        
+            msg[1]='\0';
+            error_message=msg;
+         }
+     }
+   }
+#endif
    if (png_ptr->error_fn != NULL)
-      (*(png_ptr->error_fn))(png_ptr, message);
+      (*(png_ptr->error_fn))(png_ptr, error_message);
 
    /* if the following returns or doesn't exist, use the default function,
       which will not return */
-   png_default_error(png_ptr, message);
+   png_default_error(png_ptr, error_message);
 }
 
 /* This function is called whenever there is a non-fatal error.  This function
@@ -45,12 +77,25 @@ png_error(png_structp png_ptr, png_const_charp message)
  * png_set_error_fn() to replace the warning function at run-time.
  */
 void PNGAPI
-png_warning(png_structp png_ptr, png_const_charp message)
+png_warning(png_structp png_ptr, png_const_charp warning_message)
 {
+     int offset = 0;
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+#endif
+   {
+     if (*warning_message == '#')
+     {
+         for (offset=1; offset<15; offset++)
+            if (*(warning_message+offset) == ' ')
+                break;
+     }
+   }
    if (png_ptr->warning_fn != NULL)
-      (*(png_ptr->warning_fn))(png_ptr, message);
+      (*(png_ptr->warning_fn))(png_ptr,
+         (png_const_charp)(warning_message+offset));
    else
-      png_default_warning(png_ptr, message);
+      png_default_warning(png_ptr, (png_const_charp)(warning_message+offset));
 }
 
 /* These utilities are used internally to build an error message that relates
@@ -61,11 +106,12 @@ png_warning(png_structp png_ptr, png_const_charp message)
  */
 #define isnonalpha(c) ((c) < 41 || (c) > 122 || ((c) > 90 && (c) < 97))
 static PNG_CONST char png_digit[16] = {
-   '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
-};
+   '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E',
+   'F' };
 
 static void /* PRIVATE */
-png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp message)
+png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
+   error_message)
 {
    int iout = 0, iin = 0;
 
@@ -85,30 +131,30 @@ png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp message
       }
    }
 
-   if (message == NULL)
+   if (error_message == NULL)
       buffer[iout] = 0;
    else
    {
       buffer[iout++] = ':';
       buffer[iout++] = ' ';
-      png_memcpy(buffer+iout, message, 64);
+      png_memcpy(buffer+iout, error_message, 64);
       buffer[iout+63] = 0;
    }
 }
 
 void PNGAPI
-png_chunk_error(png_structp png_ptr, png_const_charp message)
+png_chunk_error(png_structp png_ptr, png_const_charp error_message)
 {
-   char msg[16+64];
-   png_format_buffer(png_ptr, msg, message);
+   char msg[18+64];
+   png_format_buffer(png_ptr, msg, error_message);
    png_error(png_ptr, msg);
 }
 
 void PNGAPI
-png_chunk_warning(png_structp png_ptr, png_const_charp message)
+png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
 {
-   char msg[16+64];
-   png_format_buffer(png_ptr, msg, message);
+   char msg[18+64];
+   png_format_buffer(png_ptr, msg, warning_message);
    png_warning(png_ptr, msg);
 }
 
@@ -118,12 +164,34 @@ png_chunk_warning(png_structp png_ptr, png_const_charp message)
  * error function pointer in png_set_error_fn().
  */
 static void /* PRIVATE */
-png_default_error(png_structp png_ptr, png_const_charp message)
+png_default_error(png_structp png_ptr, png_const_charp error_message)
 {
 #ifndef PNG_NO_CONSOLE_IO
-   fprintf(stderr, "libpng error: %s\n", message);
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   if (*error_message == '#')
+   {
+     int offset;
+     char error_number[16];
+     for (offset=0; offset<15; offset++)
+     {
+         error_number[offset] = *(error_message+offset+1);
+         if (*(error_message+offset) == ' ')
+             break;
+     }
+     if((offset > 1) && (offset < 15))
+     {
+       error_number[offset-1]='\0';
+       fprintf(stderr, "libpng error no. %s: %s\n", error_number,
+          error_message+offset);
+     }
+     else
+       fprintf(stderr, "libpng error: %s, offset=%d\n", error_message,offset);
+   }
+   else
+#endif
+   fprintf(stderr, "libpng error: %s\n", error_message);
 #else
-   if (message)
+   if (error_message)
      /* make compiler happy */ ;
 #endif
 
@@ -150,12 +218,34 @@ png_default_error(png_structp png_ptr, png_const_charp message)
  * not used, but it is passed in case it may be useful.
  */
 static void /* PRIVATE */
-png_default_warning(png_structp png_ptr, png_const_charp message)
+png_default_warning(png_structp png_ptr, png_const_charp warning_message)
 {
 #ifndef PNG_NO_CONSOLE_IO
-   fprintf(stderr, "libpng warning: %s\n", message);
+#  ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   if (*warning_message == '#')
+   {
+     int offset;
+     char warning_number[16];
+     for (offset=0; offset<15; offset++)
+     {
+        warning_number[offset]=*(warning_message+offset+1);
+        if (*(warning_message+offset) == ' ')
+            break;
+     }
+     if((offset > 1) && (offset < 15))
+     {
+       warning_number[offset-1]='\0';
+       fprintf(stderr, "libpng warning no. %s: %s\n", warning_number,
+          warning_message+offset);
+     }
+     else
+       fprintf(stderr, "libpng warning: %s\n", warning_message);
+   }
+   else
+#  endif
+     fprintf(stderr, "libpng warning: %s\n", warning_message);
 #else
-   if (message)
+   if (warning_message)
      /* appease compiler */ ;
 #endif
    if (png_ptr)
@@ -188,4 +278,14 @@ png_get_error_ptr(png_structp png_ptr)
 }
 
 
-
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+void PNGAPI
+png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
+{
+   if(png_ptr != NULL)
+   {
+     png_ptr->flags &=
+       ((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
+   }
+}
+#endif

pngget.c

@@ -1,9 +1,9 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  */
@@ -137,7 +137,7 @@ png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
 #if defined(PNG_pHYs_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_pHYs)
    {
-       png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
+      png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
       if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
           return (0);
       else return (info_ptr->y_pixels_per_unit);
@@ -297,7 +297,7 @@ png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
      *.00003937);
 }
 
-#if defined(PNG_READ_pHYs_SUPPORTED)
+#if defined(PNG_pHYs_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
    png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
@@ -330,7 +330,7 @@ png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
    }
    return (retval);
 }
-#endif /* PNG_READ_pHYs_SUPPORTED */
+#endif /* PNG_pHYs_SUPPORTED */
 #endif  /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
 
 /* png_get_channels really belongs in here, too, but it's been around longer */
@@ -355,7 +355,7 @@ png_get_signature(png_structp png_ptr, png_infop info_ptr)
       return (NULL);
 }
 
-#if defined(PNG_READ_bKGD_SUPPORTED)
+#if defined(PNG_bKGD_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
    png_color_16p *background)
@@ -371,7 +371,7 @@ png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
 }
 #endif
 
-#if defined(PNG_READ_cHRM_SUPPORTED)
+#if defined(PNG_cHRM_SUPPORTED)
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 png_uint_32 PNGAPI
 png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
@@ -435,7 +435,7 @@ png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
 #endif
 #endif
 
-#if defined(PNG_READ_gAMA_SUPPORTED)
+#if defined(PNG_gAMA_SUPPORTED)
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 png_uint_32 PNGAPI
 png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
@@ -467,7 +467,7 @@ png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
 #endif
 #endif
 
-#if defined(PNG_READ_sRGB_SUPPORTED)
+#if defined(PNG_sRGB_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
 {
@@ -482,7 +482,7 @@ png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
 }
 #endif
 
-#if defined(PNG_READ_iCCP_SUPPORTED)
+#if defined(PNG_iCCP_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
              png_charpp name, int *compression_type,
@@ -504,7 +504,7 @@ png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
 }
 #endif
 
-#if defined(PNG_READ_sPLT_SUPPORTED)
+#if defined(PNG_sPLT_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
              png_sPLT_tpp spalettes)
@@ -515,7 +515,7 @@ png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
 }
 #endif
 
-#if defined(PNG_READ_hIST_SUPPORTED)
+#if defined(PNG_hIST_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
 {
@@ -547,7 +547,11 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
       *width = info_ptr->width;
       *height = info_ptr->height;
       *bit_depth = info_ptr->bit_depth;
+      if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16)
+        png_error(png_ptr, "Invalid bit depth");
       *color_type = info_ptr->color_type;
+      if (info_ptr->color_type > 6)
+        png_error(png_ptr, "Invalid color type");
       if (compression_type != NULL)
          *compression_type = info_ptr->compression_type;
       if (filter_type != NULL)
@@ -566,9 +570,13 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
          channels++;
       pixel_depth = *bit_depth * channels;
       rowbytes_per_pixel = (pixel_depth + 7) >> 3;
-      if ((*width > PNG_MAX_UINT/rowbytes_per_pixel))
+      if (width == 0 || *width > PNG_MAX_UINT)
+        png_error(png_ptr, "Invalid image width");
+      if (height == 0 || *height > PNG_MAX_UINT)
+        png_error(png_ptr, "Invalid image height");
+      if (*width > PNG_MAX_UINT/rowbytes_per_pixel - 64)
       {
-         png_warning(png_ptr,
+         png_error(png_ptr,
             "Width too large for libpng to process image data.");
       }
       return (1);
@@ -576,7 +584,7 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
    return (0);
 }
 
-#if defined(PNG_READ_oFFs_SUPPORTED)
+#if defined(PNG_oFFs_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
    png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
@@ -594,7 +602,7 @@ png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
 }
 #endif
 
-#if defined(PNG_READ_pCAL_SUPPORTED)
+#if defined(PNG_pCAL_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
    png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
@@ -618,7 +626,7 @@ png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
 }
 #endif
 
-#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
+#if defined(PNG_sCAL_SUPPORTED)
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 png_uint_32 PNGAPI
 png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
@@ -654,7 +662,7 @@ png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
 #endif
 #endif
 
-#if defined(PNG_READ_pHYs_SUPPORTED)
+#if defined(PNG_pHYs_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
    png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
@@ -701,7 +709,7 @@ png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
    return (0);
 }
 
-#if defined(PNG_READ_sBIT_SUPPORTED)
+#if defined(PNG_sBIT_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
 {
@@ -716,7 +724,7 @@ png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
 }
 #endif
 
-#if defined(PNG_READ_TEXT_SUPPORTED)
+#if defined(PNG_TEXT_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
    int *num_text)
@@ -738,7 +746,7 @@ png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
 }
 #endif
 
-#if defined(PNG_READ_tIME_SUPPORTED)
+#if defined(PNG_tIME_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
 {
@@ -753,7 +761,7 @@ png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
 }
 #endif
 
-#if defined(PNG_READ_tRNS_SUPPORTED)
+#if defined(PNG_tRNS_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
    png_bytep *trans, int *num_trans, png_color_16p *trans_values)
@@ -792,7 +800,7 @@ png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
 }
 #endif
 
-#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
              png_unknown_chunkpp unknowns)
@@ -807,15 +815,15 @@ png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
 png_byte PNGAPI
 png_get_rgb_to_gray_status (png_structp png_ptr)
 {
-   return png_ptr->rgb_to_gray_status;
+   return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
 }
 #endif
 
-#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
+#if defined(PNG_USER_CHUNKS_SUPPORTED)
 png_voidp PNGAPI
 png_get_user_chunk_ptr(png_structp png_ptr)
 {
-   return (png_ptr->user_chunk_ptr);
+   return (png_ptr? png_ptr->user_chunk_ptr : NULL);
 }
 #endif
 
@@ -823,5 +831,97 @@ png_get_user_chunk_ptr(png_structp png_ptr)
 png_uint_32 PNGAPI
 png_get_compression_buffer_size(png_structp png_ptr)
 {
-   return(png_ptr->zbuf_size);
+   return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
 }
+
+
+#ifndef PNG_1_0_X
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+/* this function was added to libpng 1.2.0 and should exist by default */
+png_uint_32 PNGAPI
+png_get_asm_flags (png_structp png_ptr)
+{
+    return (png_uint_32)(png_ptr? png_ptr->asm_flags : 0L);
+}
+
+/* this function was added to libpng 1.2.0 and should exist by default */
+png_uint_32 PNGAPI
+png_get_asm_flagmask (int flag_select)
+{
+    png_uint_32 settable_asm_flags = 0;
+
+    if (flag_select & PNG_SELECT_READ)
+        settable_asm_flags |=
+          PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  |
+          PNG_ASM_FLAG_MMX_READ_INTERLACE    |
+          PNG_ASM_FLAG_MMX_READ_FILTER_SUB   |
+          PNG_ASM_FLAG_MMX_READ_FILTER_UP    |
+          PNG_ASM_FLAG_MMX_READ_FILTER_AVG   |
+          PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
+          /* no non-MMX flags yet */
+
+#if 0
+    /* GRR:  no write-flags yet, either, but someday... */
+    if (flag_select & PNG_SELECT_WRITE)
+        settable_asm_flags |=
+          PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
+#endif /* 0 */
+
+    return settable_asm_flags;  /* _theoretically_ settable capabilities only */
+}
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
+
+
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+    /* GRR:  could add this:   && defined(PNG_MMX_CODE_SUPPORTED) */
+/* this function was added to libpng 1.2.0 */
+png_uint_32 PNGAPI
+png_get_mmx_flagmask (int flag_select, int *compilerID)
+{
+    png_uint_32 settable_mmx_flags = 0;
+
+    if (flag_select & PNG_SELECT_READ)
+        settable_mmx_flags |=
+          PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  |
+          PNG_ASM_FLAG_MMX_READ_INTERLACE    |
+          PNG_ASM_FLAG_MMX_READ_FILTER_SUB   |
+          PNG_ASM_FLAG_MMX_READ_FILTER_UP    |
+          PNG_ASM_FLAG_MMX_READ_FILTER_AVG   |
+          PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
+#if 0
+    /* GRR:  no MMX write support yet, but someday... */
+    if (flag_select & PNG_SELECT_WRITE)
+        settable_mmx_flags |=
+          PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
+#endif /* 0 */
+
+    if (compilerID != NULL) {
+#ifdef PNG_USE_PNGVCRD
+        *compilerID = 1;    /* MSVC */
+#else
+#ifdef PNG_USE_PNGGCCRD
+        *compilerID = 2;    /* gcc/gas */
+#else
+        *compilerID = -1;   /* unknown (i.e., no asm/MMX code compiled) */
+#endif
+#endif
+    }
+
+    return settable_mmx_flags;  /* _theoretically_ settable capabilities only */
+}
+
+/* this function was added to libpng 1.2.0 */
+png_byte PNGAPI
+png_get_mmx_bitdepth_threshold (png_structp png_ptr)
+{
+    return (png_byte)(png_ptr? png_ptr->mmx_bitdepth_threshold : 0);
+}
+
+/* this function was added to libpng 1.2.0 */
+png_uint_32 PNGAPI
+png_get_mmx_rowbytes_threshold (png_structp png_ptr)
+{
+    return (png_uint_32)(png_ptr? png_ptr->mmx_rowbytes_threshold : 0L);
+}
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
+#endif /* PNG_1_0_X */

pngmem.c

@@ -1,9 +1,9 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -27,12 +27,12 @@ png_voidp /* PRIVATE */
 png_create_struct(int type)
 {
 #ifdef PNG_USER_MEM_SUPPORTED
-   return (png_create_struct_2(type, NULL));
+   return (png_create_struct_2(type, png_malloc_ptr_NULL, png_voidp_NULL));
 }
 
 /* Alternate version of png_create_struct, for use with user-defined malloc. */
 png_voidp /* PRIVATE */
-png_create_struct_2(int type, png_malloc_ptr malloc_fn)
+png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
 {
 #endif /* PNG_USER_MEM_SUPPORTED */
    png_size_t size;
@@ -43,35 +43,36 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn)
    else if (type == PNG_STRUCT_PNG)
      size = sizeof(png_struct);
    else
-     return ((png_voidp)NULL);
+     return (png_get_copyright());
 
 #ifdef PNG_USER_MEM_SUPPORTED
    if(malloc_fn != NULL)
    {
-      if ((struct_ptr = (*(malloc_fn))(NULL, size)) != NULL)
-         png_memset(struct_ptr, 0, size);
-         return (struct_ptr);
+      png_struct dummy_struct;
+      png_structp png_ptr = &dummy_struct;
+      png_ptr->mem_ptr=mem_ptr;
+      struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size);
    }
+   else
 #endif /* PNG_USER_MEM_SUPPORTED */
-   if ((struct_ptr = (png_voidp)farmalloc(size)) != NULL)
-   {
+      struct_ptr = (png_voidp)farmalloc(size));
+   if (struct_ptr != NULL)
       png_memset(struct_ptr, 0, size);
-   }
    return (struct_ptr);
 }
 
-
 /* Free memory allocated by a png_create_struct() call */
 void /* PRIVATE */
 png_destroy_struct(png_voidp struct_ptr)
 {
 #ifdef PNG_USER_MEM_SUPPORTED
-   png_destroy_struct_2(struct_ptr, (png_free_ptr)NULL);
+   png_destroy_struct_2(struct_ptr, png_free_ptr_NULL, png_voidp_NULL);
 }
 
 /* Free memory allocated by a png_create_struct() call */
 void /* PRIVATE */
-png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn)
+png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
+    png_voidp mem_ptr)
 {
 #endif
    if (struct_ptr != NULL)
@@ -81,6 +82,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn)
       {
          png_struct dummy_struct;
          png_structp png_ptr = &dummy_struct;
+         png_ptr->mem_ptr=mem_ptr;
          (*(free_fn))(png_ptr, struct_ptr);
          return;
       }
@@ -108,18 +110,23 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn)
  * result, we would be truncating potentially larger memory requests
  * (which should cause a fatal error) and introducing major problems.
  */
+
 png_voidp PNGAPI
 png_malloc(png_structp png_ptr, png_uint_32 size)
 {
-#ifndef PNG_USER_MEM_SUPPORTED
    png_voidp ret;
-#endif
+
    if (png_ptr == NULL || size == 0)
-      return ((png_voidp)NULL);
+      return (NULL);
 
 #ifdef PNG_USER_MEM_SUPPORTED
    if(png_ptr->malloc_fn != NULL)
-       return ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size));
+   {
+       ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+       if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+          png_error(png_ptr, "Out of memory!");
+       return (ret);
+   }
    else
        return png_malloc_default(png_ptr, size);
 }
@@ -170,12 +177,22 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 
             if (table == NULL)
             {
-               png_error(png_ptr, "Out Of Memory."); /* Note "O" and "M" */
+               if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+                  png_error(png_ptr, "Out Of Memory."); /* Note "O" and "M" */
+               else
+                  png_warning(png_ptr, "Out Of Memory.");
+               return (NULL);
             }
 
             if ((png_size_t)table & 0xfff0)
             {
-               png_error(png_ptr, "Farmalloc didn't return normalized pointer");
+               if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+                  png_error(png_ptr,
+                    "Farmalloc didn't return normalized pointer");
+               else
+                  png_warning(png_ptr,
+                    "Farmalloc didn't return normalized pointer");
+               return (NULL);
             }
 
             png_ptr->offset_table = table;
@@ -184,7 +201,11 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 
             if (png_ptr->offset_table_ptr == NULL)
             {
-               png_error(png_ptr, "Out Of memory.");
+               if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+                  png_error(png_ptr, "Out Of memory."); /* Note "O" and "M" */
+               else
+                  png_warning(png_ptr, "Out Of memory.");
+               return (NULL);
             }
 
             hptr = (png_byte huge *)table;
@@ -206,7 +227,13 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
       }
 
       if (png_ptr->offset_table_count >= png_ptr->offset_table_number)
-         png_error(png_ptr, "Out of Memory.");
+      {
+         if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+            png_error(png_ptr, "Out of Memory."); /* Note "o" and "M" */
+         else
+            png_warning(png_ptr, "Out of Memory.");
+         return (NULL);
+      }
 
       ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++];
    }
@@ -215,7 +242,10 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 
    if (ret == NULL)
    {
-      png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */
+      if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+         png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */
+      else
+         png_warning(png_ptr, "Out of memory."); /* Note "o" and "m" */
    }
 
    return (ret);
@@ -276,19 +306,19 @@ png_free_default(png_structp png_ptr, png_voidp ptr)
 
 /* Allocate memory for a png_struct or a png_info.  The malloc and
    memset can be replaced by a single call to calloc() if this is thought
-   to improve performance noticably.*/
+   to improve performance noticably. */
 png_voidp /* PRIVATE */
 png_create_struct(int type)
 {
 #ifdef PNG_USER_MEM_SUPPORTED
-   return (png_create_struct_2(type, NULL));
+   return (png_create_struct_2(type, png_malloc_ptr_NULL, png_voidp_NULL));
 }
 
 /* Allocate memory for a png_struct or a png_info.  The malloc and
    memset can be replaced by a single call to calloc() if this is thought
-   to improve performance noticably.*/
+   to improve performance noticably. */
 png_voidp /* PRIVATE */
-png_create_struct_2(int type, png_malloc_ptr malloc_fn)
+png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
 {
 #endif /* PNG_USER_MEM_SUPPORTED */
    png_size_t size;
@@ -299,12 +329,16 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn)
    else if (type == PNG_STRUCT_PNG)
       size = sizeof(png_struct);
    else
-      return ((png_voidp)NULL);
+      return (NULL);
 
 #ifdef PNG_USER_MEM_SUPPORTED
    if(malloc_fn != NULL)
    {
-      if ((struct_ptr = (*(malloc_fn))(NULL, size)) != NULL)
+      png_struct dummy_struct;
+      png_structp png_ptr = &dummy_struct;
+      png_ptr->mem_ptr=mem_ptr;
+      struct_ptr = (*(malloc_fn))(png_ptr, size);
+      if (struct_ptr != NULL)
          png_memset(struct_ptr, 0, size);
       return (struct_ptr);
    }
@@ -332,12 +366,13 @@ void /* PRIVATE */
 png_destroy_struct(png_voidp struct_ptr)
 {
 #ifdef PNG_USER_MEM_SUPPORTED
-   png_destroy_struct_2(struct_ptr, (png_free_ptr)NULL);
+   png_destroy_struct_2(struct_ptr, png_free_ptr_NULL, png_voidp_NULL);
 }
 
 /* Free memory allocated by a png_create_struct() call */
 void /* PRIVATE */
-png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn)
+png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
+    png_voidp mem_ptr)
 {
 #endif /* PNG_USER_MEM_SUPPORTED */
    if (struct_ptr != NULL)
@@ -347,6 +382,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn)
       {
          png_struct dummy_struct;
          png_structp png_ptr = &dummy_struct;
+         png_ptr->mem_ptr=mem_ptr;
          (*(free_fn))(png_ptr, struct_ptr);
          return;
       }
@@ -363,7 +399,6 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn)
    }
 }
 
-
 /* Allocate memory.  For reasonable files, size should never exceed
    64K.  However, zlib may allocate more then 64K if you don't tell
    it not to.  See zconf.h and png.h for more information.  zlib does
@@ -373,19 +408,24 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn)
 png_voidp PNGAPI
 png_malloc(png_structp png_ptr, png_uint_32 size)
 {
-#ifndef PNG_USER_MEM_SUPPORTED
    png_voidp ret;
-#endif
+
    if (png_ptr == NULL || size == 0)
-      return ((png_voidp)NULL);
+      return (NULL);
 
 #ifdef PNG_USER_MEM_SUPPORTED
    if(png_ptr->malloc_fn != NULL)
-       return ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size));
+   {
+       ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+       if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+          png_error(png_ptr, "Out of Memory!");
+       return (ret);
+   }
    else
        return (png_malloc_default(png_ptr, size));
 }
-png_voidp /* PRIVATE */
+
+png_voidp PNGAPI
 png_malloc_default(png_structp png_ptr, png_uint_32 size)
 {
    png_voidp ret;
@@ -393,7 +433,12 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 
 #ifdef PNG_MAX_MALLOC_64K
    if (size > (png_uint_32)65536L)
-      png_error(png_ptr, "Cannot Allocate > 64K");
+   {
+      if(png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
+         png_error(png_ptr, "Cannot Allocate > 64K");
+      else
+         return NULL;
+   }
 #endif
 
 #if defined(__TURBOC__) && !defined(__FLAT__)
@@ -406,10 +451,8 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 # endif
 #endif
 
-   if (ret == NULL)
-   {
+   if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
       png_error(png_ptr, "Out of Memory");
-   }
 
    return (ret);
 }
@@ -430,7 +473,7 @@ png_free(png_structp png_ptr, png_voidp ptr)
    }
    else png_free_default(png_ptr, ptr);
 }
-void /* PRIVATE */
+void PNGAPI
 png_free_default(png_structp png_ptr, png_voidp ptr)
 {
    if (png_ptr == NULL || ptr == NULL)
@@ -451,7 +494,27 @@ png_free_default(png_structp png_ptr, png_voidp ptr)
 
 #endif /* Not Borland DOS special memory handler */
 
-png_voidp /* PRIVATE */
+#if defined(PNG_1_0_X)
+#  define png_malloc_warn png_malloc
+#else
+/* This function was added at libpng version 1.2.3.  The png_malloc_warn()
+ * function will issue a png_warning and return NULL instead of issuing a
+ * png_error, if it fails to allocate the requested memory.
+ */
+png_voidp PNGAPI
+png_malloc_warn(png_structp png_ptr, png_uint_32 size)
+{
+   png_voidp ptr;
+   png_uint_32 save_flags=png_ptr->flags;
+
+   png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
+   ptr = (png_voidp)png_malloc((png_structp)png_ptr, size);
+   png_ptr->flags=save_flags;
+   return(ptr);
+}
+#endif
+
+png_voidp PNGAPI
 png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
    png_uint_32 length)
 {
@@ -464,7 +527,7 @@ png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
    return(png_memcpy (s1, s2, size));
 }
 
-png_voidp /* PRIVATE */
+png_voidp PNGAPI
 png_memset_check (png_structp png_ptr, png_voidp s1, int value,
    png_uint_32 length)
 {

pngpread.c

@@ -1,9 +1,9 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  */
@@ -221,7 +221,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length);
    }
    else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4))
@@ -231,7 +230,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length);
    }
    else if (!png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
@@ -240,6 +238,12 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
        * header chunks, and we can start reading the image (or if this
        * is called after the image has been read - we have an error).
        */
+     if (!(png_ptr->mode & PNG_HAVE_IHDR))
+       png_error(png_ptr, "Missing IHDR before IDAT");
+     else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
+         !(png_ptr->mode & PNG_HAVE_PLTE))
+       png_error(png_ptr, "Missing PLTE before IDAT");
+
       if (png_ptr->mode & PNG_HAVE_IDAT)
       {
          if (png_ptr->push_length == 0)
@@ -264,8 +268,8 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_IEND(png_ptr, info_ptr, png_ptr->push_length);
+
       png_ptr->process_mode = PNG_READ_DONE_MODE;
       png_push_have_end(png_ptr, info_ptr);
    }
@@ -277,7 +281,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_gAMA(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -289,7 +292,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_sBIT(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -301,7 +303,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_cHRM(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -313,7 +314,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_sRGB(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -325,7 +325,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_iCCP(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -337,7 +336,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_sPLT(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -349,7 +347,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_tRNS(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -361,7 +358,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_bKGD(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -373,7 +369,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_hIST(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -385,7 +380,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_pHYs(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -397,7 +391,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_oFFs(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -409,7 +402,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_pCAL(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -421,7 +413,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_sCAL(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
@@ -433,30 +424,49 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
          png_push_save_buffer(png_ptr);
          return;
       }
-
       png_handle_tIME(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
 #if defined(PNG_READ_tEXt_SUPPORTED)
    else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
    {
+      if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+      {
+         png_push_save_buffer(png_ptr);
+         return;
+      }
       png_push_handle_tEXt(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
 #if defined(PNG_READ_zTXt_SUPPORTED)
    else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
    {
+      if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+      {
+         png_push_save_buffer(png_ptr);
+         return;
+      }
       png_push_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
 #if defined(PNG_READ_iTXt_SUPPORTED)
    else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
    {
+      if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+      {
+         png_push_save_buffer(png_ptr);
+         return;
+      }
       png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
    }
 #endif
    else
    {
+      if (png_ptr->push_length + 4 > png_ptr->buffer_size)
+      {
+         png_push_save_buffer(png_ptr);
+         return;
+      }
       png_push_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
    }
 
@@ -518,7 +528,7 @@ png_push_crc_finish(png_structp png_ptr)
    }
 }
 
-void /* PRIVATE */
+void PNGAPI
 png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
 {
    png_bytep ptr;
@@ -658,8 +668,8 @@ png_push_read_IDAT(png_structp png_ptr)
          save_size = png_ptr->save_buffer_size;
 
       png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size);
-      png_process_IDAT_data(png_ptr, png_ptr->save_buffer_ptr, save_size);
-
+      if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
+         png_process_IDAT_data(png_ptr, png_ptr->save_buffer_ptr, save_size);
       png_ptr->idat_size -= save_size;
       png_ptr->buffer_size -= save_size;
       png_ptr->save_buffer_size -= save_size;
@@ -680,7 +690,8 @@ png_push_read_IDAT(png_structp png_ptr)
          save_size = png_ptr->current_buffer_size;
 
       png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size);
-      png_process_IDAT_data(png_ptr, png_ptr->current_buffer_ptr, save_size);
+      if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
+        png_process_IDAT_data(png_ptr, png_ptr->current_buffer_ptr, save_size);
 
       png_ptr->idat_size -= save_size;
       png_ptr->buffer_size -= save_size;
@@ -697,6 +708,7 @@ png_push_read_IDAT(png_structp png_ptr)
 
       png_crc_finish(png_ptr, 0);
       png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
+      png_ptr->mode |= PNG_AFTER_IDAT;
    }
 }
 
@@ -736,6 +748,18 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
       }
       if (!(png_ptr->zstream.avail_out))
       {
+         if ((
+#if defined(PNG_READ_INTERLACING_SUPPORTED)
+             png_ptr->interlaced && png_ptr->pass > 6) ||
+             (!png_ptr->interlaced &&
+#endif
+             png_ptr->row_number == png_ptr->num_rows-1))
+         {
+           if (png_ptr->zstream.avail_in)
+             png_warning(png_ptr, "Too much data in IDAT chunks");
+           png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
+           break;
+         }
          png_push_process_row(png_ptr);
          png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes;
          png_ptr->zstream.next_out = png_ptr->row_buf;
@@ -772,18 +796,42 @@ png_push_process_row(png_structp png_ptr)
    if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
    {
       if (png_ptr->pass < 6)
+/*       old interface (pre-1.0.9):
          png_do_read_interlace(&(png_ptr->row_info),
             png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
+ */
+         png_do_read_interlace(png_ptr);
 
-      switch (png_ptr->pass)
-      {
+    switch (png_ptr->pass)
+    {
          case 0:
          {
             int i;
             for (i = 0; i < 8 && png_ptr->pass == 0; i++)
             {
                png_push_have_row(png_ptr, png_ptr->row_buf + 1);
-               png_read_push_finish_row(png_ptr);
+               png_read_push_finish_row(png_ptr); /* updates png_ptr->pass */
+            }
+            if (png_ptr->pass == 2) /* pass 1 might be empty */
+            {
+               for (i = 0; i < 4 && png_ptr->pass == 2; i++)
+               {
+                  png_push_have_row(png_ptr, png_bytep_NULL);
+                  png_read_push_finish_row(png_ptr);
+               }
+            }
+            if (png_ptr->pass == 4 && png_ptr->height <= 4)
+            {
+               for (i = 0; i < 2 && png_ptr->pass == 4; i++)
+               {
+                  png_push_have_row(png_ptr, png_bytep_NULL);
+                  png_read_push_finish_row(png_ptr);
+               }
+            }
+            if (png_ptr->pass == 6 && png_ptr->height <= 4)
+            {
+                png_push_have_row(png_ptr, png_bytep_NULL);
+                png_read_push_finish_row(png_ptr);
             }
             break;
          }
@@ -795,11 +843,11 @@ png_push_process_row(png_structp png_ptr)
                png_push_have_row(png_ptr, png_ptr->row_buf + 1);
                png_read_push_finish_row(png_ptr);
             }
-            if (png_ptr->pass == 2)
+            if (png_ptr->pass == 2) /* skip top 4 generated rows */
             {
                for (i = 0; i < 4 && png_ptr->pass == 2; i++)
                {
-                  png_push_have_row(png_ptr, NULL);
+                  png_push_have_row(png_ptr, png_bytep_NULL);
                   png_read_push_finish_row(png_ptr);
                }
             }
@@ -815,9 +863,17 @@ png_push_process_row(png_structp png_ptr)
             }
             for (i = 0; i < 4 && png_ptr->pass == 2; i++)
             {
-               png_push_have_row(png_ptr, NULL);
+               png_push_have_row(png_ptr, png_bytep_NULL);
                png_read_push_finish_row(png_ptr);
             }
+            if (png_ptr->pass == 4) /* pass 3 might be empty */
+            {
+               for (i = 0; i < 2 && png_ptr->pass == 4; i++)
+               {
+                  png_push_have_row(png_ptr, png_bytep_NULL);
+                  png_read_push_finish_row(png_ptr);
+               }
+            }
             break;
          }
          case 3:
@@ -828,11 +884,11 @@ png_push_process_row(png_structp png_ptr)
                png_push_have_row(png_ptr, png_ptr->row_buf + 1);
                png_read_push_finish_row(png_ptr);
             }
-            if (png_ptr->pass == 4)
+            if (png_ptr->pass == 4) /* skip top two generated rows */
             {
                for (i = 0; i < 2 && png_ptr->pass == 4; i++)
                {
-                  png_push_have_row(png_ptr, NULL);
+                  png_push_have_row(png_ptr, png_bytep_NULL);
                   png_read_push_finish_row(png_ptr);
                }
             }
@@ -848,7 +904,12 @@ png_push_process_row(png_structp png_ptr)
             }
             for (i = 0; i < 2 && png_ptr->pass == 4; i++)
             {
-               png_push_have_row(png_ptr, NULL);
+               png_push_have_row(png_ptr, png_bytep_NULL);
+               png_read_push_finish_row(png_ptr);
+            }
+            if (png_ptr->pass == 6) /* pass 5 might be empty */
+            {
+               png_push_have_row(png_ptr, png_bytep_NULL);
                png_read_push_finish_row(png_ptr);
             }
             break;
@@ -861,9 +922,9 @@ png_push_process_row(png_structp png_ptr)
                png_push_have_row(png_ptr, png_ptr->row_buf + 1);
                png_read_push_finish_row(png_ptr);
             }
-            if (png_ptr->pass == 6)
+            if (png_ptr->pass == 6) /* skip top generated row */
             {
-               png_push_have_row(png_ptr, NULL);
+               png_push_have_row(png_ptr, png_bytep_NULL);
                png_read_push_finish_row(png_ptr);
             }
             break;
@@ -874,7 +935,7 @@ png_push_process_row(png_structp png_ptr)
             png_read_push_finish_row(png_ptr);
             if (png_ptr->pass != 6)
                break;
-            png_push_have_row(png_ptr, NULL);
+            png_push_have_row(png_ptr, png_bytep_NULL);
             png_read_push_finish_row(png_ptr);
          }
       }
@@ -928,6 +989,13 @@ png_read_push_finish_row(png_structp png_ptr)
       do
       {
          png_ptr->pass++;
+         if ((png_ptr->pass == 1 && png_ptr->width < 5) ||
+             (png_ptr->pass == 3 && png_ptr->width < 3) ||
+             (png_ptr->pass == 5 && png_ptr->width < 2))
+           png_ptr->pass++;
+
+         if (png_ptr->pass > 7)
+            png_ptr->pass--;
          if (png_ptr->pass >= 7)
             break;
 
@@ -953,7 +1021,8 @@ png_read_push_finish_row(png_structp png_ptr)
 
 #if defined(PNG_READ_tEXt_SUPPORTED)
 void /* PRIVATE */
-png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
+   length)
 {
    if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
       {
@@ -965,7 +1034,7 @@ png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length
 #ifdef PNG_MAX_MALLOC_64K
    png_ptr->skip_length = 0;  /* This may not be necessary */
 
-   if (length > (png_uint_32)65535L) /* Can't hold the entire string in memory */
+   if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
    {
       png_warning(png_ptr, "tEXt chunk too large to fit in memory");
       png_ptr->skip_length = length - (png_uint_32)65535L;
@@ -1002,6 +1071,7 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
       png_textp text_ptr;
       png_charp text;
       png_charp key;
+      int ret;
 
       if (png_ptr->buffer_size < 4)
       {
@@ -1017,7 +1087,6 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
 #endif
 
       key = png_ptr->current_text;
-      png_ptr->current_text = 0;
 
       for (text = key; *text; text++)
          /* empty loop */ ;
@@ -1029,22 +1098,27 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
       text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
       text_ptr->key = key;
 #ifdef PNG_iTXt_SUPPORTED
-      text_ptr->lang = (char *)NULL;
-      text_ptr->lang_key = (char *)NULL;
+      text_ptr->lang = NULL;
+      text_ptr->lang_key = NULL;
 #endif
       text_ptr->text = text;
 
-      png_set_text(png_ptr, info_ptr, text_ptr, 1);
+      ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
 
       png_free(png_ptr, key);
       png_free(png_ptr, text_ptr);
+      png_ptr->current_text = NULL;
+
+      if (ret)
+        png_warning(png_ptr, "Insufficient memory to store text chunk.");
    }
 }
 #endif
 
 #if defined(PNG_READ_zTXt_SUPPORTED)
 void /* PRIVATE */
-png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
+   length)
 {
    if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
       {
@@ -1107,7 +1181,6 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
       png_push_crc_finish(png_ptr);
 
       key = png_ptr->current_text;
-      png_ptr->current_text = 0;
 
       for (text = key; *text; text++)
          /* empty loop */ ;
@@ -1115,6 +1188,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
       /* zTXt can't have zero text */
       if (text == key + png_ptr->current_text_size)
       {
+         png_ptr->current_text = NULL;
          png_free(png_ptr, key);
          return;
       }
@@ -1123,6 +1197,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
 
       if (*text != PNG_TEXT_COMPRESSION_zTXt) /* check compression byte */
       {
+         png_ptr->current_text = NULL;
          png_free(png_ptr, key);
          return;
       }
@@ -1147,6 +1222,7 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
          {
             inflateReset(&png_ptr->zstream);
             png_ptr->zstream.avail_in = 0;
+            png_ptr->current_text = NULL;
             png_free(png_ptr, key);
             png_free(png_ptr, text);
             return;
@@ -1156,8 +1232,8 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
             if (text == NULL)
             {
                text = (png_charp)png_malloc(png_ptr,
-                  (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out +
-                     key_size + 1));
+                  (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
+                     + key_size + 1));
                png_memcpy(text + key_size, png_ptr->zbuf,
                   png_ptr->zbuf_size - png_ptr->zstream.avail_out);
                png_memcpy(text, key, key_size);
@@ -1200,11 +1276,13 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
 
       if (ret != Z_STREAM_END)
       {
+         png_ptr->current_text = NULL;
          png_free(png_ptr, key);
          png_free(png_ptr, text);
          return;
       }
 
+      png_ptr->current_text = NULL;
       png_free(png_ptr, key);
       key = text;
       text += key_size;
@@ -1213,22 +1291,26 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
       text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt;
       text_ptr->key = key;
 #ifdef PNG_iTXt_SUPPORTED
-      text_ptr->lang = (char *)NULL;
-      text_ptr->lang_key = (char *)NULL;
+      text_ptr->lang = NULL;
+      text_ptr->lang_key = NULL;
 #endif
       text_ptr->text = text;
 
-      png_set_text(png_ptr, info_ptr, text_ptr, 1);
+      ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
 
       png_free(png_ptr, key);
       png_free(png_ptr, text_ptr);
+
+      if (ret)
+        png_warning(png_ptr, "Insufficient memory to store text chunk.");
    }
 }
 #endif
 
 #if defined(PNG_READ_iTXt_SUPPORTED)
 void /* PRIVATE */
-png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
+   length)
 {
    if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
       {
@@ -1240,7 +1322,7 @@ png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length
 #ifdef PNG_MAX_MALLOC_64K
    png_ptr->skip_length = 0;  /* This may not be necessary */
 
-   if (length > (png_uint_32)65535L) /* Can't hold the entire string in memory */
+   if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
    {
       png_warning(png_ptr, "iTXt chunk too large to fit in memory");
       png_ptr->skip_length = length - (png_uint_32)65535L;
@@ -1281,6 +1363,7 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
       png_charp lang;
       png_charp lang_key;
       png_charp text;
+      int ret;
 
       if (png_ptr->buffer_size < 4)
       {
@@ -1296,7 +1379,6 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
 #endif
 
       key = png_ptr->current_text;
-      png_ptr->current_text = 0;
 
       for (lang = key; *lang; lang++)
          /* empty loop */ ;
@@ -1326,9 +1408,13 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
       text_ptr->text_length = 0;
       text_ptr->itxt_length = png_strlen(text);
 
-      png_set_text(png_ptr, info_ptr, text_ptr, 1);
+      ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
+
+      png_ptr->current_text = NULL;
 
       png_free(png_ptr, text_ptr);
+      if (ret)
+        png_warning(png_ptr, "Insufficient memory to store iTXt chunk.");
    }
 }
 #endif
@@ -1338,7 +1424,8 @@ png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
  * name or a critical chunk), the chunk is (currently) silently ignored.
  */
 void /* PRIVATE */
-png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
+png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
+   length)
 {
    png_uint_32 skip=0;
    png_check_chunk_name(png_ptr, png_ptr->chunk_name);
@@ -1349,7 +1436,7 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 len
       if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
            HANDLE_CHUNK_ALWAYS
 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
-           && png_ptr->read_user_chunk_fn == (png_user_chunk_ptr)NULL
+           && png_ptr->read_user_chunk_fn == NULL
 #endif
          )
 #endif
@@ -1374,12 +1461,12 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 len
        }
 #endif
 
-       strcpy((png_charp)chunk.name, (png_charp)png_ptr->chunk_name);
+       png_strcpy((png_charp)chunk.name, (png_charp)png_ptr->chunk_name);
        chunk.data = (png_bytep)png_malloc(png_ptr, length);
        png_crc_read(png_ptr, chunk.data, length);
        chunk.size = length;
 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
-       if(png_ptr->read_user_chunk_fn != (png_user_chunk_ptr)NULL)
+       if(png_ptr->read_user_chunk_fn != NULL)
        {
           /* callback to user unknown chunk handler */
           if ((*(png_ptr->read_user_chunk_fn)) (png_ptr, &chunk) <= 0)
@@ -1453,6 +1540,4 @@ png_get_progressive_ptr(png_structp png_ptr)
 {
    return png_ptr->io_ptr;
 }
-
 #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
-

pngread.c

@@ -1,9 +1,9 @@
 
 /* pngread.c - read a PNG file
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -22,7 +22,7 @@ png_create_read_struct(png_const_charp user_png_ver, png_voidp error_ptr,
 
 #ifdef PNG_USER_MEM_SUPPORTED
    return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn,
-      warn_fn, NULL, NULL, NULL));
+      warn_fn, png_voidp_NULL, png_malloc_ptr_NULL, png_free_ptr_NULL));
 }
 
 /* Alternate create PNG structure for reading, and allocate any memory needed. */
@@ -45,14 +45,19 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
 
    png_debug(1, "in png_create_read_struct\n");
 #ifdef PNG_USER_MEM_SUPPORTED
-   if ((png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
-      (png_malloc_ptr)malloc_fn)) == NULL)
+   png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
+      (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
 #else
-   if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL)
+   png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
 #endif
-   {
-      return (png_structp)NULL;
-   }
+   if (png_ptr == NULL)
+      return (NULL);
+
+#if !defined(PNG_1_0_X)
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */
+#endif
+#endif /* PNG_1_0_X */
 
 #ifdef PNG_SETJMP_SUPPORTED
 #ifdef USE_FAR_KEYWORD
@@ -63,8 +68,13 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
    {
       png_free(png_ptr, png_ptr->zbuf);
       png_ptr->zbuf=NULL;
-      png_destroy_struct(png_ptr);
-      return (png_structp)NULL;
+#ifdef PNG_USER_MEM_SUPPORTED
+      png_destroy_struct_2((png_voidp)png_ptr, 
+         (png_free_ptr)free_fn, (png_voidp)mem_ptr);
+#else
+      png_destroy_struct((png_voidp)png_ptr);
+#endif
+      return (NULL);
    }
 #ifdef USE_FAR_KEYWORD
    png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
@@ -92,23 +102,27 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
       * only check the first digit.
       */
      if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
+         (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
          (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
      {
+#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
+        char msg[80];
+        if (user_png_ver)
+        {
+          sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
+             user_png_ver);
+          png_warning(png_ptr, msg);
+        }
+        sprintf(msg, "Application  is  running with png.c from libpng-%.20s",
+           png_libpng_ver);
+        png_warning(png_ptr, msg);
+#endif
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+        png_ptr->flags=0;
+#endif
         png_error(png_ptr,
            "Incompatible libpng version in application and library");
      }
-
-     /* Libpng 1.0.6 was not binary compatible, due to insertion of the
-        info_ptr->free_me member.  Note to maintainer: this test can be
-        removed from version 2.0.0 and beyond because the previous test
-        would have already rejected it. */
-
-     if (user_png_ver[4] == '6' && user_png_ver[2] == '0' &&
-         user_png_ver[0] == '1' && user_png_ver[5] == '\0')
-     {
-        png_error(png_ptr,
-           "Application must be recompiled; version 1.0.6 was incompatible");
-     }
    }
 
    /* initialize zbuf - compression buffer */
@@ -131,8 +145,21 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
    png_ptr->zstream.next_out = png_ptr->zbuf;
    png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
 
-   png_set_read_fn(png_ptr, NULL, NULL);
+   png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);
 
+#ifdef PNG_SETJMP_SUPPORTED
+/* Applications that neglect to set up their own setjmp() and then encounter
+   a png_error() will longjmp here.  Since the jmpbuf is then meaningless we
+   abort instead of returning. */
+#ifdef USE_FAR_KEYWORD
+   if (setjmp(jmpbuf))
+      PNG_ABORT();
+   png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
+#else
+   if (setjmp(png_ptr->jmpbuf))
+      PNG_ABORT();
+#endif
+#endif
    return (png_ptr);
 }
 
@@ -144,18 +171,63 @@ void PNGAPI
 png_read_init(png_structp png_ptr)
 {
    /* We only come here via pre-1.0.7-compiled applications */
-   png_read_init_2(png_ptr, "1.0.0", 10000, 10000);
+   png_read_init_2(png_ptr, "1.0.6 or earlier", 0, 0);
 }
 
 void PNGAPI
 png_read_init_2(png_structp png_ptr, png_const_charp user_png_ver,
    png_size_t png_struct_size, png_size_t png_info_size)
+{
+   /* We only come here via pre-1.0.12-compiled applications */
+#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
+   if(sizeof(png_struct) > png_struct_size || sizeof(png_info) > png_info_size)
+   {
+      char msg[80];
+      png_ptr->warning_fn=NULL;
+      if (user_png_ver)
+      {
+        sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
+           user_png_ver);
+        png_warning(png_ptr, msg);
+      }
+      sprintf(msg, "Application  is  running with png.c from libpng-%.20s",
+         png_libpng_ver);
+      png_warning(png_ptr, msg);
+   }
+#endif
+   if(sizeof(png_struct) > png_struct_size)
+     {
+       png_ptr->error_fn=NULL;
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+       png_ptr->flags=0;
+#endif
+       png_error(png_ptr,
+       "The png struct allocated by the application for reading is too small.");
+     }
+   if(sizeof(png_info) > png_info_size)
+     {
+       png_ptr->error_fn=NULL;
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+       png_ptr->flags=0;
+#endif
+       png_error(png_ptr,
+         "The info struct allocated by application for reading is too small.");
+     }
+   png_read_init_3(&png_ptr, user_png_ver, png_struct_size);
+}
+
+void PNGAPI
+png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
+   png_size_t png_struct_size)
 {
 #ifdef PNG_SETJMP_SUPPORTED
    jmp_buf tmp_jmp;  /* to save current jump buffer */
 #endif
 
    int i=0;
+
+   png_structp png_ptr=*ptr_ptr;
+
    do
    {
      if(user_png_ver[i] != png_libpng_ver[i])
@@ -163,28 +235,28 @@ png_read_init_2(png_structp png_ptr, png_const_charp user_png_ver,
 #ifdef PNG_LEGACY_SUPPORTED
        png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
 #else
-       png_ptr->error_fn=(png_error_ptr)NULL;
-       png_error(png_ptr,
-        "Application uses deprecated png_read_init() and must be recompiled.");
+       png_ptr->warning_fn=NULL;
+       png_warning(png_ptr,
+        "Application uses deprecated png_read_init() and should be recompiled.");
+       break;
 #endif
      }
    } while (png_libpng_ver[i++]);
 
-   if(sizeof(png_struct) > png_struct_size ||
-      sizeof(png_info) > png_info_size)
-     {
-       png_ptr->error_fn=(png_error_ptr)NULL;
-       png_error(png_ptr,
-      "Application and library have different sized structs. Please recompile.");
-     }
-
-   png_debug(1, "in png_read_init_2\n");
+   png_debug(1, "in png_read_init_3\n");
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* save jump buffer and error functions */
    png_memcpy(tmp_jmp, png_ptr->jmpbuf, sizeof (jmp_buf));
 #endif
 
+   if(sizeof(png_struct) > png_struct_size)
+     {
+       png_destroy_struct(png_ptr);
+       *ptr_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
+       png_ptr = *ptr_ptr;
+     }
+
    /* reset all variables to 0 */
    png_memset(png_ptr, 0, sizeof (png_struct));
 
@@ -213,7 +285,7 @@ png_read_init_2(png_structp png_ptr, png_const_charp user_png_ver,
    png_ptr->zstream.next_out = png_ptr->zbuf;
    png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
 
-   png_set_read_fn(png_ptr, NULL, NULL);
+   png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);
 }
 
 /* Read the information before the actual image data.  This has been
@@ -228,7 +300,6 @@ void PNGAPI
 png_read_info(png_structp png_ptr, png_infop info_ptr)
 {
    png_debug(1, "in png_read_info\n");
-   /* save jump buffer and error functions */
    /* If we haven't checked all of the PNG signature bytes, do so now. */
    if (png_ptr->sig_bytes < 8)
    {
@@ -246,6 +317,8 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
          else
             png_error(png_ptr, "PNG file corrupted by ASCII conversion");
       }
+      if (num_checked < 3)
+         png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
    }
 
    for(;;)
@@ -319,6 +392,9 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
       png_debug2(0, "Reading %s chunk, length=%lu.\n", png_ptr->chunk_name,
          length);
 
+      if (length > PNG_MAX_UINT)
+         png_error(png_ptr, "Invalid chunk length.");
+
       /* This should be a binary subdivision search or a hash for
        * matching the chunk name rather than a linear search.
        */
@@ -437,7 +513,6 @@ void PNGAPI
 png_read_update_info(png_structp png_ptr, png_infop info_ptr)
 {
    png_debug(1, "in png_read_update_info\n");
-   /* save jump buffer and error functions */
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
       png_read_start_row(png_ptr);
    else
@@ -455,7 +530,6 @@ void PNGAPI
 png_start_read_image(png_structp png_ptr)
 {
    png_debug(1, "in png_start_read_image\n");
-   /* save jump buffer and error functions */
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
       png_read_start_row(png_ptr);
 }
@@ -471,7 +545,6 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
    int ret;
    png_debug2(1, "in png_read_row (row %lu, pass %d)\n",
       png_ptr->row_number, png_ptr->pass);
-   /* save jump buffer and error functions */
    if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
       png_read_start_row(png_ptr);
    if (png_ptr->row_number == 0 && png_ptr->pass == 0)
@@ -602,6 +675,9 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
             png_read_data(png_ptr, chunk_length, 4);
             png_ptr->idat_size = png_get_uint_32(chunk_length);
 
+            if (png_ptr->idat_size > PNG_MAX_UINT)
+              png_error(png_ptr, "Invalid chunk length.");
+
             png_reset_crc(png_ptr);
             png_crc_read(png_ptr, png_ptr->chunk_name, 4);
             if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
@@ -646,6 +722,15 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
 
    png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf,
       png_ptr->rowbytes + 1);
+   
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
+   if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+      (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
+   {
+      /* Intrapixel differencing */
+      png_do_read_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
+   }
+#endif
 
    if (png_ptr->transformations)
       png_do_read_transformations(png_ptr);
@@ -656,8 +741,11 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
       (png_ptr->transformations & PNG_INTERLACE))
    {
       if (png_ptr->pass < 6)
+/*       old interface (pre-1.0.9):
          png_do_read_interlace(&(png_ptr->row_info),
             png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations);
+ */
+         png_do_read_interlace(png_ptr);
 
       if (dsp_row != NULL)
          png_combine_row(png_ptr, dsp_row,
@@ -701,7 +789,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
  * not called png_set_interlace_handling(), the display_row buffer will
  * be ignored, so pass NULL to it.
  *
- * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.9beta3
+ * [*] png_handle_alpha() does not exist yet, as of libpng version 1.2.6beta1
  */
 
 void PNGAPI
@@ -713,7 +801,6 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
    png_bytepp dp;
 
    png_debug(1, "in png_read_rows\n");
-   /* save jump buffer and error functions */
    rp = row;
    dp = display_row;
    if (rp != NULL && dp != NULL)
@@ -728,14 +815,14 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
       for (i = 0; i < num_rows; i++)
       {
          png_bytep rptr = *rp;
-         png_read_row(png_ptr, rptr, NULL);
+         png_read_row(png_ptr, rptr, png_bytep_NULL);
          rp++;
       }
    else if(dp != NULL)
       for (i = 0; i < num_rows; i++)
       {
          png_bytep dptr = *dp;
-         png_read_row(png_ptr, NULL, dptr);
+         png_read_row(png_ptr, png_bytep_NULL, dptr);
          dp++;
       }
 }
@@ -750,7 +837,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
  * only call this function once.  If you desire to have an image for
  * each pass of a interlaced image, use png_read_rows() instead.
  *
- * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.9beta3
+ * [*] png_handle_alpha() does not exist yet, as of libpng version 1.2.6beta1
  */
 void PNGAPI
 png_read_image(png_structp png_ptr, png_bytepp image)
@@ -760,7 +847,6 @@ png_read_image(png_structp png_ptr, png_bytepp image)
    png_bytepp rp;
 
    png_debug(1, "in png_read_image\n");
-   /* save jump buffer and error functions */
 
 #ifdef PNG_READ_INTERLACING_SUPPORTED
    pass = png_set_interlace_handling(png_ptr);
@@ -780,7 +866,7 @@ png_read_image(png_structp png_ptr, png_bytepp image)
       rp = image;
       for (i = 0; i < image_height; i++)
       {
-         png_read_row(png_ptr, *rp, NULL);
+         png_read_row(png_ptr, *rp, png_bytep_NULL);
          rp++;
       }
    }
@@ -797,7 +883,6 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
    png_uint_32 length;
 
    png_debug(1, "in png_read_end\n");
-   /* save jump buffer and error functions */
    png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
 
    do
@@ -868,6 +953,9 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
 
       png_debug1(0, "Reading %s chunk.\n", png_ptr->chunk_name);
 
+      if (length > PNG_MAX_UINT)
+         png_error(png_ptr, "Invalid chunk length.");
+
       if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
          png_handle_IHDR(png_ptr, info_ptr, length);
       else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
@@ -980,10 +1068,10 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
    png_infop info_ptr = NULL, end_info_ptr = NULL;
 #ifdef PNG_USER_MEM_SUPPORTED
    png_free_ptr free_fn = NULL;
+   png_voidp mem_ptr = NULL;
 #endif
 
    png_debug(1, "in png_destroy_read_struct\n");
-   /* save jump buffer and error functions */
    if (png_ptr_ptr != NULL)
       png_ptr = *png_ptr_ptr;
 
@@ -995,6 +1083,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
 
 #ifdef PNG_USER_MEM_SUPPORTED
    free_fn = png_ptr->free_fn;
+   mem_ptr = png_ptr->mem_ptr;
 #endif
 
    png_read_destroy(png_ptr, info_ptr, end_info_ptr);
@@ -1006,11 +1095,12 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
 #endif
 
 #ifdef PNG_USER_MEM_SUPPORTED
-      png_destroy_struct_2((png_voidp)info_ptr, free_fn);
+      png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
+          (png_voidp)mem_ptr);
 #else
       png_destroy_struct((png_voidp)info_ptr);
 #endif
-      *info_ptr_ptr = (png_infop)NULL;
+      *info_ptr_ptr = NULL;
    }
 
    if (end_info_ptr != NULL)
@@ -1019,26 +1109,28 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
       png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1);
 #endif
 #ifdef PNG_USER_MEM_SUPPORTED
-      png_destroy_struct_2((png_voidp)end_info_ptr, free_fn);
+      png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn,
+         (png_voidp)mem_ptr);
 #else
       png_destroy_struct((png_voidp)end_info_ptr);
 #endif
-      *end_info_ptr_ptr = (png_infop)NULL;
+      *end_info_ptr_ptr = NULL;
    }
 
    if (png_ptr != NULL)
    {
 #ifdef PNG_USER_MEM_SUPPORTED
-      png_destroy_struct_2((png_voidp)png_ptr, free_fn);
+      png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
+          (png_voidp)mem_ptr);
 #else
       png_destroy_struct((png_voidp)png_ptr);
 #endif
-      *png_ptr_ptr = (png_structp)NULL;
+      *png_ptr_ptr = NULL;
    }
 }
 
 /* free all memory used by the read (old method) */
-void PNGAPI
+void /* PRIVATE */
 png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr)
 {
 #ifdef PNG_SETJMP_SUPPORTED
@@ -1052,7 +1144,6 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
 #endif
 
    png_debug(1, "in png_read_destroy\n");
-   /* save jump buffer and error functions */
    if (info_ptr != NULL)
       png_info_destroy(png_ptr, info_ptr);
 
@@ -1060,7 +1151,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
       png_info_destroy(png_ptr, end_info_ptr);
 
    png_free(png_ptr, png_ptr->zbuf);
-   png_free(png_ptr, png_ptr->row_buf);
+   png_free(png_ptr, png_ptr->big_row_buf);
    png_free(png_ptr, png_ptr->prev_row);
 #if defined(PNG_READ_DITHER_SUPPORTED)
    png_free(png_ptr, png_ptr->palette_lookup);
@@ -1148,6 +1239,12 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr
    png_free(png_ptr, png_ptr->save_buffer);
 #endif
 
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+#ifdef PNG_TEXT_SUPPORTED
+   png_free(png_ptr, png_ptr->current_text);
+#endif /* PNG_TEXT_SUPPORTED */
+#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+
    /* Save the important info out of the png_struct, in case it is
     * being used again.
     */
@@ -1291,7 +1388,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
 
    /* Optional call to gamma correct and add the background to the palette
     * and update info structure.  REQUIRED if you are expecting libpng to
-    * update the palette for you (ie you selected such a transform above).
+    * update the palette for you (i.e., you selected such a transform above).
     */
    png_read_update_info(png_ptr, info_ptr);
 
@@ -1303,13 +1400,15 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
    if(info_ptr->row_pointers == NULL)
    {
       info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr,
-                                         info_ptr->height * sizeof(png_bytep));
+         info_ptr->height * sizeof(png_bytep));
 #ifdef PNG_FREE_ME_SUPPORTED
       info_ptr->free_me |= PNG_FREE_ROWS;
 #endif
       for (row = 0; row < (int)info_ptr->height; row++)
-         info_ptr->row_pointers[row] = png_malloc(png_ptr,
+      {
+         info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr,
             png_get_rowbytes(png_ptr, info_ptr));
+      }
    }
 
    png_read_image(png_ptr, info_ptr->row_pointers);
@@ -1318,7 +1417,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
    /* read rest of file, and get additional chunks in info_ptr - REQUIRED */
    png_read_end(png_ptr, info_ptr);
 
-   if(transforms == 0 || params == (voidp)NULL)
+   if(transforms == 0 || params == NULL)
       /* quiet compiler warnings */ return;
 
 }

pngrio.c

@@ -1,9 +1,9 @@
 
 /* pngrio.c - functions for data input
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -26,7 +26,7 @@
 void /* PRIVATE */
 png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
-   png_debug1(4,"reading %d bytes\n", length);
+   png_debug1(4,"reading %d bytes\n", (int)length);
    if (png_ptr->read_data_fn != NULL)
       (*(png_ptr->read_data_fn))(png_ptr, data, length);
    else
@@ -39,7 +39,7 @@ png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
    read_data function and use it at run time with png_set_read_fn(), rather
    than changing the library. */
 #ifndef USE_FAR_KEYWORD
-static void /* PRIVATE */
+void PNGAPI
 png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    png_size_t check;
@@ -159,4 +159,3 @@ png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
    png_ptr->output_flush_fn = NULL;
 #endif
 }
-

pngrtran.c

@@ -1,9 +1,9 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -167,15 +167,14 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
             Perhaps not the best solution, but good enough. */
 
          int i;
-         png_bytep sort;
 
          /* initialize an array to sort colors */
-         sort = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_palette
-            * sizeof (png_byte)));
+         png_ptr->dither_sort = (png_bytep)png_malloc(png_ptr,
+            (png_uint_32)(num_palette * sizeof (png_byte)));
 
-         /* initialize the sort array */
+         /* initialize the dither_sort array */
          for (i = 0; i < num_palette; i++)
-            sort[i] = (png_byte)i;
+            png_ptr->dither_sort[i] = (png_byte)i;
 
          /* Find the least used palette entries by starting a
             bubble sort, and running it until we have sorted
@@ -191,13 +190,14 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
             done = 1;
             for (j = 0; j < i; j++)
             {
-               if (histogram[sort[j]] < histogram[sort[j + 1]])
+               if (histogram[png_ptr->dither_sort[j]]
+                   < histogram[png_ptr->dither_sort[j + 1]])
                {
                   png_byte t;
 
-                  t = sort[j];
-                  sort[j] = sort[j + 1];
-                  sort[j + 1] = t;
+                  t = png_ptr->dither_sort[j];
+                  png_ptr->dither_sort[j] = png_ptr->dither_sort[j + 1];
+                  png_ptr->dither_sort[j + 1] = t;
                   done = 0;
                }
             }
@@ -214,11 +214,11 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
                move the others */
             for (i = 0; i < maximum_colors; i++)
             {
-               if ((int)sort[i] >= maximum_colors)
+               if ((int)png_ptr->dither_sort[i] >= maximum_colors)
                {
                   do
                      j--;
-                  while ((int)sort[j] >= maximum_colors);
+                  while ((int)png_ptr->dither_sort[j] >= maximum_colors);
                   palette[i] = palette[j];
                }
             }
@@ -232,13 +232,13 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
             for (i = 0; i < maximum_colors; i++)
             {
                /* only move the colors we need to */
-               if ((int)sort[i] >= maximum_colors)
+               if ((int)png_ptr->dither_sort[i] >= maximum_colors)
                {
                   png_color tmp_color;
 
                   do
                      j--;
-                  while ((int)sort[j] >= maximum_colors);
+                  while ((int)png_ptr->dither_sort[j] >= maximum_colors);
 
                   tmp_color = palette[j];
                   palette[j] = palette[i];
@@ -276,7 +276,8 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
                }
             }
          }
-         png_free(png_ptr, sort);
+         png_free(png_ptr, png_ptr->dither_sort);
+         png_ptr->dither_sort=NULL;
       }
       else
       {
@@ -291,23 +292,22 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
          int i;
          int max_d;
          int num_new_palette;
+         png_dsortp t;
          png_dsortpp hash;
-         png_bytep index_to_palette;
-            /* where the original index currently is in the palette */
-         png_bytep palette_to_index;
-            /* which original index points to this palette color */
+
+         t=NULL;
 
          /* initialize palette index arrays */
-         index_to_palette = (png_bytep)png_malloc(png_ptr,
+         png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr,
             (png_uint_32)(num_palette * sizeof (png_byte)));
-         palette_to_index = (png_bytep)png_malloc(png_ptr,
+         png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr,
             (png_uint_32)(num_palette * sizeof (png_byte)));
 
          /* initialize the sort array */
          for (i = 0; i < num_palette; i++)
          {
-            index_to_palette[i] = (png_byte)i;
-            palette_to_index[i] = (png_byte)i;
+            png_ptr->index_to_palette[i] = (png_byte)i;
+            png_ptr->palette_to_index[i] = (png_byte)i;
          }
 
          hash = (png_dsortpp)png_malloc(png_ptr, (png_uint_32)(769 *
@@ -342,18 +342,22 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
 
                   if (d <= max_d)
                   {
-                     png_dsortp t;
 
-                     t = (png_dsortp)png_malloc(png_ptr, (png_uint_32)(sizeof
-                         (png_dsort)));
+                     t = (png_dsortp)png_malloc_warn(png_ptr,
+                         (png_uint_32)(sizeof(png_dsort)));
+                     if (t == NULL)
+                         break;
                      t->next = hash[d];
                      t->left = (png_byte)i;
                      t->right = (png_byte)j;
                      hash[d] = t;
                   }
                }
+               if (t == NULL)
+                  break;
             }
 
+            if (t != NULL)
             for (i = 0; i <= max_d; i++)
             {
                if (hash[i] != NULL)
@@ -362,8 +366,10 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
 
                   for (p = hash[i]; p; p = p->next)
                   {
-                     if ((int)index_to_palette[p->left] < num_new_palette &&
-                        (int)index_to_palette[p->right] < num_new_palette)
+                     if ((int)png_ptr->index_to_palette[p->left]
+                        < num_new_palette &&
+                        (int)png_ptr->index_to_palette[p->right]
+                        < num_new_palette)
                      {
                         int j, next_j;
 
@@ -379,7 +385,8 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
                         }
 
                         num_new_palette--;
-                        palette[index_to_palette[j]] = palette[num_new_palette];
+                        palette[png_ptr->index_to_palette[j]]
+                          = palette[num_new_palette];
                         if (!full_dither)
                         {
                            int k;
@@ -387,23 +394,23 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
                            for (k = 0; k < num_palette; k++)
                            {
                               if (png_ptr->dither_index[k] ==
-                                 index_to_palette[j])
+                                 png_ptr->index_to_palette[j])
                                  png_ptr->dither_index[k] =
-                                    index_to_palette[next_j];
+                                    png_ptr->index_to_palette[next_j];
                               if ((int)png_ptr->dither_index[k] ==
                                  num_new_palette)
                                  png_ptr->dither_index[k] =
-                                    index_to_palette[j];
+                                    png_ptr->index_to_palette[j];
                            }
                         }
 
-                        index_to_palette[palette_to_index[num_new_palette]] =
-                           index_to_palette[j];
-                        palette_to_index[index_to_palette[j]] =
-                           palette_to_index[num_new_palette];
+                        png_ptr->index_to_palette[png_ptr->palette_to_index
+                           [num_new_palette]] = png_ptr->index_to_palette[j];
+                        png_ptr->palette_to_index[png_ptr->index_to_palette[j]]
+                           = png_ptr->palette_to_index[num_new_palette];
 
-                        index_to_palette[j] = (png_byte)num_new_palette;
-                        palette_to_index[num_new_palette] = (png_byte)j;
+                        png_ptr->index_to_palette[j] = (png_byte)num_new_palette;
+                        png_ptr->palette_to_index[num_new_palette] = (png_byte)j;
                      }
                      if (num_new_palette <= maximum_colors)
                         break;
@@ -420,8 +427,6 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
                   png_dsortp p = hash[i];
                   while (p)
                   {
-                     png_dsortp t;
-
                      t = p->next;
                      png_free(png_ptr, p);
                      p = t;
@@ -432,8 +437,10 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
             max_d += 96;
          }
          png_free(png_ptr, hash);
-         png_free(png_ptr, palette_to_index);
-         png_free(png_ptr, index_to_palette);
+         png_free(png_ptr, png_ptr->palette_to_index);
+         png_free(png_ptr, png_ptr->index_to_palette);
+         png_ptr->palette_to_index=NULL;
+         png_ptr->index_to_palette=NULL;
       }
       num_palette = maximum_colors;
    }
@@ -510,13 +517,19 @@ png_set_dither(png_structp png_ptr, png_colorp palette,
  * only do transformations on images where the file_gamma and screen_gamma
  * are not close reciprocals, otherwise it slows things down slightly, and
  * also needlessly introduces small errors.
+ *
+ * We will turn off gamma transformation later if no semitransparent entries
+ * are present in the tRNS array for palette images.  We can't do it here
+ * because we don't necessarily have the tRNS chunk yet.
  */
 void PNGAPI
 png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma)
 {
    png_debug(1, "in png_set_gamma\n");
-   if (fabs(scrn_gamma * file_gamma - 1.0) > PNG_GAMMA_THRESHOLD)
-      png_ptr->transformations |= PNG_GAMMA;
+   if ((fabs(scrn_gamma * file_gamma - 1.0) > PNG_GAMMA_THRESHOLD) ||
+       (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) ||
+       (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE))
+     png_ptr->transformations |= PNG_GAMMA;
    png_ptr->gamma = (float)file_gamma;
    png_ptr->screen_gamma = (float)scrn_gamma;
 }
@@ -692,23 +705,23 @@ png_init_read_transformations(png_structp png_ptr)
          {
             case 1:
                png_ptr->background.gray *= (png_uint_16)0xff;
-               png_ptr->background.red = png_ptr->background.green =
-               png_ptr->background.blue = png_ptr->background.gray;
+               png_ptr->background.red = png_ptr->background.green
+                 =  png_ptr->background.blue = png_ptr->background.gray;
                break;
             case 2:
                png_ptr->background.gray *= (png_uint_16)0x55;
-               png_ptr->background.red = png_ptr->background.green =
-               png_ptr->background.blue = png_ptr->background.gray;
+               png_ptr->background.red = png_ptr->background.green
+                 = png_ptr->background.blue = png_ptr->background.gray;
                break;
             case 4:
                png_ptr->background.gray *= (png_uint_16)0x11;
-               png_ptr->background.red = png_ptr->background.green =
-               png_ptr->background.blue = png_ptr->background.gray;
+               png_ptr->background.red = png_ptr->background.green
+                 = png_ptr->background.blue = png_ptr->background.gray;
                break;
             case 8:
             case 16:
-               png_ptr->background.red = png_ptr->background.green =
-               png_ptr->background.blue = png_ptr->background.gray;
+               png_ptr->background.red = png_ptr->background.green
+                 = png_ptr->background.blue = png_ptr->background.gray;
                break;
          }
       }
@@ -742,10 +755,26 @@ png_init_read_transformations(png_structp png_ptr)
    }
 #endif
 
-#if defined(PNG_READ_BACKGROUND_SUPPORTED)
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED)
    png_ptr->background_1 = png_ptr->background;
 #endif
 #if defined(PNG_READ_GAMMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED)
+
+   if ((color_type == PNG_COLOR_TYPE_PALETTE && png_ptr->num_trans != 0)
+       && (fabs(png_ptr->screen_gamma * png_ptr->gamma - 1.0)
+         < PNG_GAMMA_THRESHOLD))
+   {
+    int i,k;
+    k=0;
+    for (i=0; i<png_ptr->num_trans; i++)
+    {
+      if (png_ptr->trans[i] != 0 && png_ptr->trans[i] != 0xff)
+        k=1; /* partial transparency is present */
+    }
+    if (k == 0)
+      png_ptr->transformations &= (~PNG_GAMMA);
+   }
+
    if (png_ptr->transformations & (PNG_GAMMA | PNG_RGB_TO_GRAY))
    {
       png_build_gamma_table(png_ptr);
@@ -754,6 +783,8 @@ png_init_read_transformations(png_structp png_ptr)
       {
          if (color_type == PNG_COLOR_TYPE_PALETTE)
          {
+           /* could skip if no transparency and 
+           */
             png_color back, back_1;
             png_colorp palette = png_ptr->palette;
             int num_palette = png_ptr->num_palette;
@@ -848,7 +879,7 @@ png_init_read_transformations(png_structp png_ptr)
                }
             }
          }
-         /* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN)*/
+         /* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN) */
          else
          /* color_type != PNG_COLOR_TYPE_PALETTE */
          {
@@ -873,9 +904,16 @@ png_init_read_transformations(png_structp png_ptr)
                   break;
             }
 
-            if (color_type & PNG_COLOR_MASK_COLOR)
+            png_ptr->background_1.gray = (png_uint_16)(pow(
+               (double)png_ptr->background.gray / m, g) * m + .5);
+            png_ptr->background.gray = (png_uint_16)(pow(
+               (double)png_ptr->background.gray / m, gs) * m + .5);
+
+            if ((png_ptr->background.red != png_ptr->background.green) ||
+                (png_ptr->background.red != png_ptr->background.blue) ||
+                (png_ptr->background.red != png_ptr->background.gray))
             {
-               /* RGB or RGBA */
+               /* RGB or RGBA with color background */
                png_ptr->background_1.red = (png_uint_16)(pow(
                   (double)png_ptr->background.red / m, g) * m + .5);
                png_ptr->background_1.green = (png_uint_16)(pow(
@@ -891,17 +929,17 @@ png_init_read_transformations(png_structp png_ptr)
             }
             else
             {
-               /* GRAY or GRAY ALPHA */
-               png_ptr->background_1.gray = (png_uint_16)(pow(
-                  (double)png_ptr->background.gray / m, g) * m + .5);
-               png_ptr->background.gray = (png_uint_16)(pow(
-                  (double)png_ptr->background.gray / m, gs) * m + .5);
+               /* GRAY, GRAY ALPHA, RGB, or RGBA with gray background */
+               png_ptr->background_1.red = png_ptr->background_1.green
+                 = png_ptr->background_1.blue = png_ptr->background_1.gray;
+               png_ptr->background.red = png_ptr->background.green
+                 = png_ptr->background.blue = png_ptr->background.gray;
             }
          }
       }
       else
       /* transformation does not include PNG_BACKGROUND */
-#endif
+#endif /* PNG_READ_BACKGROUND_SUPPORTED */
       if (color_type == PNG_COLOR_TYPE_PALETTE)
       {
          png_colorp palette = png_ptr->palette;
@@ -919,7 +957,7 @@ png_init_read_transformations(png_structp png_ptr)
 #if defined(PNG_READ_BACKGROUND_SUPPORTED)
    else
 #endif
-#endif
+#endif /* PNG_READ_GAMMA_SUPPORTED && PNG_FLOATING_POINT_SUPPORTED */
 #if defined(PNG_READ_BACKGROUND_SUPPORTED)
    /* No GAMMA transformation */
    if ((png_ptr->transformations & PNG_BACKGROUND) &&
@@ -952,7 +990,7 @@ png_init_read_transformations(png_structp png_ptr)
          }
       }
    }
-#endif
+#endif /* PNG_READ_BACKGROUND_SUPPORTED */
 
 #if defined(PNG_READ_SHIFT_SUPPORTED)
    if ((png_ptr->transformations & PNG_SHIFT) &&
@@ -977,7 +1015,7 @@ png_init_read_transformations(png_structp png_ptr)
          png_ptr->palette[i].blue >>= sb;
       }
    }
-#endif
+#endif  /* PNG_READ_SHIFT_SUPPORTED */
  }
 #if !defined(PNG_READ_GAMMA_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) \
  && !defined(PNG_READ_BACKGROUND_SUPPORTED)
@@ -1227,12 +1265,15 @@ From Andreas Dilger e-mail to png-implement, 26 March 1998:
       ((png_ptr->num_trans != 0 ) ||
       (png_ptr->color_type & PNG_COLOR_MASK_ALPHA)))
       png_do_background(&(png_ptr->row_info), png_ptr->row_buf + 1,
-         &(png_ptr->trans_values), &(png_ptr->background),
-         &(png_ptr->background_1),
+         &(png_ptr->trans_values), &(png_ptr->background)
+#if defined(PNG_READ_GAMMA_SUPPORTED)
+         , &(png_ptr->background_1),
          png_ptr->gamma_table, png_ptr->gamma_from_1,
          png_ptr->gamma_to_1, png_ptr->gamma_16_table,
          png_ptr->gamma_16_from_1, png_ptr->gamma_16_to_1,
-         png_ptr->gamma_shift);
+         png_ptr->gamma_shift
+#endif
+);
 #endif
 
 #if defined(PNG_READ_GAMMA_SUPPORTED)
@@ -2312,7 +2353,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
  * paletted.  Most useful for gamma correction and simplification
  * of code.
  */
-void /* PRIVATE */
+void PNGAPI
 png_build_grayscale_palette(int bit_depth, png_colorp palette)
 {
    int num_palette;
@@ -2545,11 +2586,14 @@ png_correct_palette(png_structp png_ptr, png_colorp palette,
  */
 void /* PRIVATE */
 png_do_background(png_row_infop row_info, png_bytep row,
-   png_color_16p trans_values, png_color_16p background,
-   png_color_16p background_1,
+   png_color_16p trans_values, png_color_16p background
+#if defined(PNG_READ_GAMMA_SUPPORTED)
+   , png_color_16p background_1,
    png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1,
    png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1,
-   png_uint_16pp gamma_16_to_1, int gamma_shift)
+   png_uint_16pp gamma_16_to_1, int gamma_shift
+#endif
+   )
 {
    png_bytep sp, dp;
    png_uint_32 i;
@@ -2932,6 +2976,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
                      {
                         *dp = *sp;
                      }
+#if defined(PNG_READ_GAMMA_SUPPORTED)
                      else if (a == 0)
                      {
                         *dp = (png_byte)background->gray;
@@ -2940,6 +2985,9 @@ png_do_background(png_row_infop row_info, png_bytep row,
                      {
                         png_composite(*dp, *sp, a, background_1->gray);
                      }
+#else
+                     *dp = (png_byte)background->gray;
+#endif
                   }
                }
             }
@@ -2963,12 +3011,17 @@ png_do_background(png_row_infop row_info, png_bytep row,
                         *dp = (png_byte)((v >> 8) & 0xff);
                         *(dp + 1) = (png_byte)(v & 0xff);
                      }
+#if defined(PNG_READ_GAMMA_SUPPORTED)
                      else if (a == 0)
+#else
+                     else
+#endif
                      {
                         /* background is already in screen gamma */
                         *dp = (png_byte)((background->gray >> 8) & 0xff);
                         *(dp + 1) = (png_byte)(background->gray & 0xff);
                      }
+#if defined(PNG_READ_GAMMA_SUPPORTED)
                      else
                      {
                         png_uint_16 g, v, w;
@@ -2979,6 +3032,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
                         *dp = (png_byte)((w >> 8) & 0xff);
                         *(dp + 1) = (png_byte)(w & 0xff);
                      }
+#endif
                   }
                }
                else
@@ -2993,11 +3047,16 @@ png_do_background(png_row_infop row_info, png_bytep row,
                      {
                         png_memcpy(dp, sp, 2);
                      }
+#if defined(PNG_READ_GAMMA_SUPPORTED)
                      else if (a == 0)
+#else
+                     else
+#endif
                      {
                         *dp = (png_byte)((background->gray >> 8) & 0xff);
                         *(dp + 1) = (png_byte)(background->gray & 0xff);
                      }
+#if defined(PNG_READ_GAMMA_SUPPORTED)
                      else
                      {
                         png_uint_16 g, v;
@@ -3007,6 +3066,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
                         *dp = (png_byte)((v >> 8) & 0xff);
                         *(dp + 1) = (png_byte)(v & 0xff);
                      }
+#endif
                   }
                }
             }
@@ -3128,17 +3188,17 @@ png_do_background(png_row_infop row_info, png_bytep row,
                         png_uint_16 v, w, x;
 
                         v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp];
-                        png_composite_16(w, v, a, background->red);
+                        png_composite_16(w, v, a, background_1->red);
                         x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
                         *dp = (png_byte)((x >> 8) & 0xff);
                         *(dp + 1) = (png_byte)(x & 0xff);
                         v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)];
-                        png_composite_16(w, v, a, background->green);
+                        png_composite_16(w, v, a, background_1->green);
                         x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
                         *(dp + 2) = (png_byte)((x >> 8) & 0xff);
                         *(dp + 3) = (png_byte)(x & 0xff);
                         v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)];
-                        png_composite_16(w, v, a, background->blue);
+                        png_composite_16(w, v, a, background_1->blue);
                         x = gamma_16_from_1[(w & 0xff) >> gamma_shift][w >> 8];
                         *(dp + 4) = (png_byte)((x >> 8) & 0xff);
                         *(dp + 5) = (png_byte)(x & 0xff);
@@ -4053,3 +4113,63 @@ png_build_gamma_table(png_structp png_ptr)
 /* To do: install integer version of png_build_gamma_table here */
 #endif
 
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
+/* undoes intrapixel differencing  */
+void /* PRIVATE */
+png_do_read_intrapixel(png_row_infop row_info, png_bytep row)
+{
+   png_debug(1, "in png_do_read_intrapixel\n");
+   if (
+#if defined(PNG_USELESS_TESTS_SUPPORTED)
+       row != NULL && row_info != NULL &&
+#endif
+       (row_info->color_type & PNG_COLOR_MASK_COLOR))
+   {
+      int bytes_per_pixel;
+      png_uint_32 row_width = row_info->width;
+      if (row_info->bit_depth == 8)
+      {
+         png_bytep rp;
+         png_uint_32 i;
+
+         if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+            bytes_per_pixel = 3;
+         else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+            bytes_per_pixel = 4;
+         else
+            return;
+
+         for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
+         {
+            *(rp) = (png_byte)((256 + *rp + *(rp+1))&0xff);
+            *(rp+2) = (png_byte)((256 + *(rp+2) + *(rp+1))&0xff);
+         }
+      }
+      else if (row_info->bit_depth == 16)
+      {
+         png_bytep rp;
+         png_uint_32 i;
+
+         if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+            bytes_per_pixel = 6;
+         else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+            bytes_per_pixel = 8;
+         else
+            return;
+
+         for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
+         {
+            png_uint_32 s0=*(rp  )<<8 | *(rp+1);
+            png_uint_32 s1=*(rp+2)<<8 | *(rp+3);
+            png_uint_32 s2=*(rp+4)<<8 | *(rp+5);
+            png_uint_32 red=(65536+s0+s1)&0xffff;
+            png_uint_32 blue=(65536+s2+s1)&0xffff;
+            *(rp  ) = (png_byte)((red>>8)&0xff);
+            *(rp+1) = (png_byte)(red&0xff);
+            *(rp+4) = (png_byte)((blue>>8)&0xff);
+            *(rp+5) = (png_byte)(blue&0xff);
+         }
+      }
+   }
+}
+#endif /* PNG_MNG_FEATURES_SUPPORTED */

pngrutil.c

@@ -1,9 +1,9 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -30,7 +30,7 @@ __inline double strtod(const char *nptr, char **endptr)
       MultiByteToWideChar(CP_ACP, 0, nptr, -1, str, len);
       result = wcstod(str, &end);
       len = WideCharToMultiByte(CP_ACP, 0, end, -1, NULL, 0, NULL, NULL);
-      *endptr = (char *)nptr + (strlen(nptr) - len + 1);
+      *endptr = (char *)nptr + (png_strlen(nptr) - len + 1);
       free(str);
    }
    return result;
@@ -174,7 +174,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
    png_charp text = NULL;
    png_size_t text_size;
 
-   if (comp_type == PNG_TEXT_COMPRESSION_zTXt)
+   if (comp_type == PNG_COMPRESSION_TYPE_BASE)
    {
       int ret = Z_OK;
       png_ptr->zstream.next_in = (png_bytep)(chunkdata + prefix_size);
@@ -200,7 +200,12 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
             if (text ==  NULL)
             {
                text_size = prefix_size + sizeof(msg) + 1;
-               text = (png_charp)png_malloc(png_ptr, text_size);
+               text = (png_charp)png_malloc_warn(png_ptr, text_size);
+               if (text ==  NULL)
+                 {
+                    png_free(png_ptr,chunkdata);
+                    png_error(png_ptr,"Not enough memory to decompress chunk");
+                 }
                png_memcpy(text, chunkdata, prefix_size);
             }
 
@@ -218,9 +223,14 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
             {
                text_size = prefix_size +
                    png_ptr->zbuf_size - png_ptr->zstream.avail_out;
-               text = (png_charp)png_malloc(png_ptr, text_size + 1);
+               text = (png_charp)png_malloc_warn(png_ptr, text_size + 1);
+               if (text ==  NULL)
+                 {
+                    png_free(png_ptr,chunkdata);
+                    png_error(png_ptr,"Not enough memory to decompress chunk.");
+                 }
                png_memcpy(text + prefix_size, png_ptr->zbuf,
-                          text_size - prefix_size);
+                    text_size - prefix_size);
                png_memcpy(text, chunkdata, prefix_size);
                *(text + text_size) = 0x00;
             }
@@ -229,8 +239,15 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
                png_charp tmp;
 
                tmp = text;
-               text = (png_charp)png_malloc(png_ptr, (png_uint_32)(text_size +
+               text = (png_charp)png_malloc_warn(png_ptr,
+                  (png_uint_32)(text_size +
                   png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1));
+               if (text == NULL)
+               {
+                  png_free(png_ptr, tmp);
+                  png_free(png_ptr, chunkdata);
+                  png_error(png_ptr,"Not enough memory to decompress chunk..");
+               }
                png_memcpy(text, tmp, text_size);
                png_free(png_ptr, tmp);
                png_memcpy(text + text_size, png_ptr->zbuf,
@@ -266,6 +283,18 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
          png_warning(png_ptr,
             "Incomplete compressed datastream in chunk other than IDAT");
 #endif
+         text_size=prefix_size;
+         if (text ==  NULL)
+         {
+            text = (png_charp)png_malloc_warn(png_ptr, text_size+1);
+            if (text == NULL)
+              {
+                png_free(png_ptr, chunkdata);
+                png_error(png_ptr,"Not enough memory for text.");
+              }
+            png_memcpy(text, chunkdata, prefix_size);
+         }
+         *(text + text_size) = 0x00;
       }
 
       inflateReset(&png_ptr->zstream);
@@ -275,7 +304,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
       chunkdata = text;
       *newlength=text_size;
    }
-   else /* if (comp_type != PNG_TEXT_COMPRESSION_zTXt) */
+   else /* if (comp_type != PNG_COMPRESSION_TYPE_BASE) */
    {
 #if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
       char umsg[50];
@@ -286,10 +315,8 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
       png_warning(png_ptr, "Unknown zTXt compression type");
 #endif
 
-      /* Copy what we can of the error message into the text chunk */
-      text_size = (png_size_t)(chunklength - (text - chunkdata));
-      text_size = sizeof(msg) > text_size ? text_size : sizeof(msg);
-      png_memcpy(text, msg, text_size);
+      *(chunkdata + prefix_size) = 0x00;
+      *newlength=prefix_size;
    }
 
    return chunkdata;
@@ -327,34 +354,6 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    filter_type = buf[11];
    interlace_type = buf[12];
 
-   /* check for width and height valid values */
-   if (width == 0 || width > PNG_MAX_UINT || height == 0 ||
-        height > PNG_MAX_UINT)
-      png_error(png_ptr, "Invalid image size in IHDR");
-
-   /* check other values */
-   if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
-      bit_depth != 8 && bit_depth != 16)
-      png_error(png_ptr, "Invalid bit depth in IHDR");
-
-   if (color_type < 0 || color_type == 1 ||
-      color_type == 5 || color_type > 6)
-      png_error(png_ptr, "Invalid color type in IHDR");
-
-   if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
-       ((color_type == PNG_COLOR_TYPE_RGB ||
-         color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
-         color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
-      png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
-
-   if (interlace_type >= PNG_INTERLACE_LAST)
-      png_error(png_ptr, "Unknown interlace method in IHDR");
-
-   if (compression_type != PNG_COMPRESSION_TYPE_BASE)
-      png_error(png_ptr, "Unknown compression method in IHDR");
-
-   if (filter_type != PNG_FILTER_TYPE_BASE)
-      png_error(png_ptr, "Unknown filter method in IHDR");
 
    /* set internal variables */
    png_ptr->width = width;
@@ -362,6 +361,9 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    png_ptr->bit_depth = (png_byte)bit_depth;
    png_ptr->interlaced = (png_byte)interlace_type;
    png_ptr->color_type = (png_byte)color_type;
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
+   png_ptr->filter_type = (png_byte)filter_type;
+#endif
 
    /* find number of channels */
    switch (png_ptr->color_type)
@@ -397,7 +399,7 @@ png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 void /* PRIVATE */
 png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 {
-   png_colorp palette;
+   png_color palette[PNG_MAX_PALETTE_LENGTH];
    int num, i;
 #ifndef PNG_NO_POINTER_INDEXING
    png_colorp pal_ptr;
@@ -418,6 +420,13 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 
    png_ptr->mode |= PNG_HAVE_PLTE;
 
+   if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
+   {
+      png_warning(png_ptr,
+        "Ignoring PLTE chunk in grayscale PNG");
+      png_crc_finish(png_ptr, length);
+      return;
+   }
 #if !defined(PNG_READ_OPT_PLTE_SUPPORTED)
    if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
    {
@@ -426,7 +435,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    }
 #endif
 
-   if (length > 768 || length % 3)
+   if (length > 3*PNG_MAX_PALETTE_LENGTH || length % 3)
    {
       if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
       {
@@ -442,8 +451,6 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 
    num = (int)length / 3;
 
-   palette = (png_colorp)png_zalloc(png_ptr, (uInt)num, sizeof (png_color));
-
 #ifndef PNG_NO_POINTER_INDEXING
    for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++)
    {
@@ -493,7 +500,6 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
          else
          {
             png_chunk_warning(png_ptr, "CRC error");
-            png_zfree(png_ptr, palette);
             return;
          }
       }
@@ -504,15 +510,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
       }
    }
 #endif
-   png_ptr->palette = palette;
-   png_ptr->num_palette = (png_uint_16)num;
 
-#ifdef PNG_FREE_ME_SUPPORTED
-   png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
-   png_ptr->free_me |= PNG_FREE_PLTE;
-#else
-   png_ptr->flags |= PNG_FLAG_FREE_PLTE;
-#endif
    png_set_PLTE(png_ptr, info_ptr, palette, num);
 
 #if defined(PNG_READ_tRNS_SUPPORTED)
@@ -545,9 +543,7 @@ png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    {
       png_error(png_ptr, "No image in file");
 
-      /* to quiet compiler warnings about unused info_ptr */
-      if (info_ptr == NULL)
-         return;
+      info_ptr = info_ptr; /* quiet compiler warnings about unused info_ptr */
    }
 
    png_ptr->mode |= (PNG_AFTER_IDAT | PNG_HAVE_IEND);
@@ -608,7 +604,11 @@ png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    igamma = (png_fixed_point)png_get_uint_32(buf);
    /* check for zero gamma */
    if (igamma == 0)
-      return;
+      {
+         png_warning(png_ptr,
+           "Ignoring gAMA chunk with gamma=0");
+         return;
+      }
 
 #if defined(PNG_READ_sRGB_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_sRGB)
@@ -713,6 +713,8 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    png_fixed_point int_x_white, int_y_white, int_x_red, int_y_red, int_x_green,
       int_y_green, int_x_blue, int_y_blue;
 
+   png_uint_32 uint_x, uint_y;
+
    png_debug(1, "in png_handle_cHRM\n");
 
    if (!(png_ptr->mode & PNG_HAVE_IHDR))
@@ -746,60 +748,69 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    }
 
    png_crc_read(png_ptr, buf, 4);
-   int_x_white = (png_fixed_point)png_get_uint_32(buf);
+   uint_x = png_get_uint_32(buf);
 
    png_crc_read(png_ptr, buf, 4);
-   int_y_white = (png_fixed_point)png_get_uint_32(buf);
+   uint_y = png_get_uint_32(buf);
 
-   if (int_x_white > 80000L || int_y_white > 80000L ||
-      int_x_white + int_y_white > 100000L)
+   if (uint_x > 80000L || uint_y > 80000L ||
+      uint_x + uint_y > 100000L)
    {
       png_warning(png_ptr, "Invalid cHRM white point");
       png_crc_finish(png_ptr, 24);
       return;
    }
+   int_x_white = (png_fixed_point)uint_x;
+   int_y_white = (png_fixed_point)uint_y;
 
    png_crc_read(png_ptr, buf, 4);
-   int_x_red = (png_fixed_point)png_get_uint_32(buf);
+   uint_x = png_get_uint_32(buf);
 
    png_crc_read(png_ptr, buf, 4);
-   int_y_red = (png_fixed_point)png_get_uint_32(buf);
+   uint_y = png_get_uint_32(buf);
 
-   if (int_x_red > 80000L || int_y_red > 80000L ||
-      int_x_red + int_y_red > 100000L)
+   if (uint_x > 80000L || uint_y > 80000L ||
+      uint_x + uint_y > 100000L)
    {
       png_warning(png_ptr, "Invalid cHRM red point");
       png_crc_finish(png_ptr, 16);
       return;
    }
+   int_x_red = (png_fixed_point)uint_x;
+   int_y_red = (png_fixed_point)uint_y;
 
    png_crc_read(png_ptr, buf, 4);
-   int_x_green = (png_fixed_point)png_get_uint_32(buf);
+   uint_x = png_get_uint_32(buf);
 
    png_crc_read(png_ptr, buf, 4);
-   int_y_green = (png_fixed_point)png_get_uint_32(buf);
+   uint_y = png_get_uint_32(buf);
 
-   if (int_x_green > 80000L || int_y_green > 80000L ||
-      int_x_green + int_y_green > 100000L)
+   if (uint_x > 80000L || uint_y > 80000L ||
+      uint_x + uint_y > 100000L)
    {
       png_warning(png_ptr, "Invalid cHRM green point");
       png_crc_finish(png_ptr, 8);
       return;
    }
+   int_x_green = (png_fixed_point)uint_x;
+   int_y_green = (png_fixed_point)uint_y;
 
    png_crc_read(png_ptr, buf, 4);
-   int_x_blue = (png_fixed_point)png_get_uint_32(buf);
+   uint_x = png_get_uint_32(buf);
 
    png_crc_read(png_ptr, buf, 4);
-   int_y_blue = (png_fixed_point)png_get_uint_32(buf);
+   uint_y = png_get_uint_32(buf);
 
-   if (int_x_blue > 80000L || int_y_blue > 80000L ||
-      int_x_blue + int_y_blue > 100000L)
+   if (uint_x > 80000L || uint_y > 80000L ||
+      uint_x + uint_y > 100000L)
    {
       png_warning(png_ptr, "Invalid cHRM blue point");
       png_crc_finish(png_ptr, 0);
       return;
    }
+   int_x_blue = (png_fixed_point)uint_x;
+   int_y_blue = (png_fixed_point)uint_y;
+
 #ifdef PNG_FLOATING_POINT_SUPPORTED
    white_x = (float)int_x_white / (float)100000.0;
    white_y = (float)int_y_white / (float)100000.0;
@@ -816,12 +827,12 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
       {
       if (abs(int_x_white - 31270L) > 1000 ||
           abs(int_y_white - 32900L) > 1000 ||
-          abs(  int_x_red - 64000L) > 1000 ||
-          abs(  int_y_red - 33000L) > 1000 ||
+          abs(int_x_red   - 64000L) > 1000 ||
+          abs(int_y_red   - 33000L) > 1000 ||
           abs(int_x_green - 30000L) > 1000 ||
           abs(int_y_green - 60000L) > 1000 ||
-          abs( int_x_blue - 15000L) > 1000 ||
-          abs( int_y_blue -  6000L) > 1000)
+          abs(int_x_blue  - 15000L) > 1000 ||
+          abs(int_y_blue  -  6000L) > 1000)
          {
 
             png_warning(png_ptr,
@@ -916,17 +927,6 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 #  ifdef PNG_FLOATING_POINT_SUPPORTED
       igamma=(int)(info_ptr->gamma * 100000.);
 #  endif
-#endif
-#if 0 && defined(PNG_cHRM_SUPPORTED) && !defined(PNG_FIXED_POINT_SUPPORTED)
-/* We need to define these here because they aren't in png.h */
-   png_fixed_point int_x_white;
-   png_fixed_point int_y_white;
-   png_fixed_point int_x_red;
-   png_fixed_point int_y_red;
-   png_fixed_point int_x_green;
-   png_fixed_point int_y_green;
-   png_fixed_point int_x_blue;
-   png_fixed_point int_y_blue;
 #endif
       if(igamma < 45000L || igamma > 46000L)
       {
@@ -950,12 +950,12 @@ png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    if (info_ptr->valid & PNG_INFO_cHRM)
       if (abs(info_ptr->int_x_white - 31270L) > 1000 ||
           abs(info_ptr->int_y_white - 32900L) > 1000 ||
-          abs(  info_ptr->int_x_red - 64000L) > 1000 ||
-          abs(  info_ptr->int_y_red - 33000L) > 1000 ||
+          abs(info_ptr->int_x_red   - 64000L) > 1000 ||
+          abs(info_ptr->int_y_red   - 33000L) > 1000 ||
           abs(info_ptr->int_x_green - 30000L) > 1000 ||
           abs(info_ptr->int_y_green - 60000L) > 1000 ||
-          abs( info_ptr->int_x_blue - 15000L) > 1000 ||
-          abs( info_ptr->int_y_blue -  6000L) > 1000)
+          abs(info_ptr->int_x_blue  - 15000L) > 1000 ||
+          abs(info_ptr->int_y_blue  -  6000L) > 1000)
          {
             png_warning(png_ptr,
               "Ignoring incorrect cHRM value when sRGB is also present");
@@ -974,6 +974,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 {
    png_charp chunkdata;
    png_byte compression_type;
+   png_bytep pC;
    png_charp profile;
    png_uint_32 skip = 0;
    png_uint_32 profile_size = 0;
@@ -1050,22 +1051,33 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
                                     slength, prefix_length, &data_length);
 
    profile_length = data_length - prefix_length;
-   profile_size = ((*(chunkdata+prefix_length))<<24) |
-                  ((*(chunkdata+prefix_length+1))<<16) |
-                  ((*(chunkdata+prefix_length+2))<< 8) |
-                  ((*(chunkdata+prefix_length+3))    );
+
+   if ( prefix_length > data_length || profile_length < 4)
+   {
+      png_free(png_ptr, chunkdata);
+      png_warning(png_ptr, "Profile size field missing from iCCP chunk");
+      return;
+   }
+
+   /* Check the profile_size recorded in the first 32 bits of the ICC profile */
+   pC = (png_bytep)(chunkdata+prefix_length);
+   profile_size = ((*(pC  ))<<24) |
+                  ((*(pC+1))<<16) |
+                  ((*(pC+2))<< 8) |
+                  ((*(pC+3))    );
 
    if(profile_size < profile_length)
       profile_length = profile_size;
 
    if(profile_size > profile_length)
    {
+      png_free(png_ptr, chunkdata);
       png_warning(png_ptr, "Ignoring truncated iCCP profile.\n");
       return;
    }
 
    png_set_iCCP(png_ptr, info_ptr, chunkdata, compression_type,
-                chunkdata + prefix_length, data_length-prefix_length);
+                chunkdata + prefix_length, profile_length);
    png_free(png_ptr, chunkdata);
 }
 #endif /* PNG_READ_iCCP_SUPPORTED */
@@ -1107,7 +1119,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 
    chunkdata = (png_bytep)png_malloc(png_ptr, length + 1);
    slength = (png_size_t)length;
-   png_crc_read(png_ptr, chunkdata, slength);
+   png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
 
    if (png_crc_finish(png_ptr, skip))
    {
@@ -1137,7 +1149,8 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    if (data_length % entry_size)
    {
       png_free(png_ptr, chunkdata);
-      png_error(png_ptr, "sPLT chunk has bad length");
+      png_warning(png_ptr, "sPLT chunk has bad length");
+      return;
    }
 
    new_palette.nentries = data_length / entry_size;
@@ -1202,6 +1215,8 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 void /* PRIVATE */
 png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 {
+   png_byte readbuf[PNG_MAX_PALETTE_LENGTH];
+
    png_debug(1, "in png_handle_tRNS\n");
 
    if (!(png_ptr->mode & PNG_HAVE_IHDR))
@@ -1239,8 +1254,7 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
          return;
       }
 
-      png_ptr->trans = (png_bytep)png_malloc(png_ptr, length);
-      png_crc_read(png_ptr, png_ptr->trans, (png_size_t)length);
+      png_crc_read(png_ptr, readbuf, (png_size_t)length);
       png_ptr->num_trans = (png_uint_16)length;
    }
    else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
@@ -1285,15 +1299,7 @@ png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    if (png_crc_finish(png_ptr, 0))
       return;
 
-#ifdef PNG_FREE_ME_SUPPORTED
-   png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
-   if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
-      png_ptr->free_me |= PNG_FREE_TRNS;
-#else
-   if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
-      png_ptr->flags |= PNG_FLAG_FREE_TRNS;
-#endif
-   png_set_tRNS(png_ptr, info_ptr, png_ptr->trans, png_ptr->num_trans,
+   png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans,
       &(png_ptr->trans_values));
 }
 #endif
@@ -1392,6 +1398,7 @@ void /* PRIVATE */
 png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 {
    int num, i;
+   png_uint_16 readbuf[PNG_MAX_PALETTE_LENGTH];
 
    png_debug(1, "in png_handle_hIST\n");
 
@@ -1416,34 +1423,26 @@ png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
       return;
    }
 
-   if (length != (png_uint_32)(2 * png_ptr->num_palette))
+   num = (int)length / 2 ;
+   if (num != png_ptr->num_palette)
    {
       png_warning(png_ptr, "Incorrect hIST chunk length");
       png_crc_finish(png_ptr, length);
       return;
    }
 
-   num = (int)length / 2 ;
-   png_ptr->hist = (png_uint_16p)png_malloc(png_ptr,
-      (png_uint_32)(num * sizeof (png_uint_16)));
    for (i = 0; i < num; i++)
    {
       png_byte buf[2];
 
       png_crc_read(png_ptr, buf, 2);
-      png_ptr->hist[i] = png_get_uint_16(buf);
+      readbuf[i] = png_get_uint_16(buf);
    }
 
    if (png_crc_finish(png_ptr, 0))
       return;
 
-#ifdef PNG_FREE_ME_SUPPORTED
-   png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
-   png_ptr->free_me |= PNG_FREE_HIST;
-#else
-   png_ptr->flags |= PNG_FLAG_FREE_HIST;
-#endif
-   png_set_hIST(png_ptr, info_ptr, png_ptr->hist);
+   png_set_hIST(png_ptr, info_ptr, readbuf);
 }
 #endif
 
@@ -1565,7 +1564,12 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 
    png_debug1(2, "Allocating and reading pCAL chunk data (%lu bytes)\n",
       length + 1);
-   purpose = (png_charp)png_malloc(png_ptr, length + 1);
+   purpose = (png_charp)png_malloc_warn(png_ptr, length + 1);
+   if (purpose == NULL)
+     {
+       png_warning(png_ptr, "No memory for pCAL purpose.");
+       return;
+     }
    slength = (png_size_t)length;
    png_crc_read(png_ptr, (png_bytep)purpose, slength);
 
@@ -1620,8 +1624,14 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
       /* Empty loop to move past the units string. */ ;
 
    png_debug(3, "Allocating pCAL parameters array\n");
-   params = (png_charpp)png_malloc(png_ptr, (png_uint_32)(nparams
+   params = (png_charpp)png_malloc_warn(png_ptr, (png_uint_32)(nparams
       *sizeof(png_charp))) ;
+   if (params == NULL)
+     {
+       png_free(png_ptr, purpose);
+       png_warning(png_ptr, "No memory for pCAL params.");
+       return;
+     }
 
    /* Get pointers to the start of each parameter string. */
    for (i = 0; i < (int)nparams; i++)
@@ -1685,7 +1695,12 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
 
    png_debug1(2, "Allocating and reading sCAL chunk data (%lu bytes)\n",
       length + 1);
-   buffer = (png_charp)png_malloc(png_ptr, length + 1);
+   buffer = (png_charp)png_malloc_warn(png_ptr, length + 1);
+   if (buffer == NULL)
+     {
+       png_warning(png_ptr, "Out of memory while processing sCAL chunk");
+       return;
+     }
    slength = (png_size_t)length;
    png_crc_read(png_ptr, (png_bytep)buffer, slength);
 
@@ -1708,8 +1723,13 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    }
 #else
 #ifdef PNG_FIXED_POINT_SUPPORTED
-   swidth = (png_charp)png_malloc(png_ptr, strlen(ep) + 1);
-   png_memcpy(swidth, ep, (png_size_t)strlen(ep));
+   swidth = (png_charp)png_malloc_warn(png_ptr, png_strlen(ep) + 1);
+   if (swidth == NULL)
+     {
+       png_warning(png_ptr, "Out of memory while processing sCAL chunk width");
+       return;
+     }
+   png_memcpy(swidth, ep, (png_size_t)png_strlen(ep));
 #endif
 #endif
 
@@ -1726,8 +1746,13 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    }
 #else
 #ifdef PNG_FIXED_POINT_SUPPORTED
-   sheight = (png_charp)png_malloc(png_ptr, strlen(ep) + 1);
-   png_memcpy(sheight, ep, (png_size_t)strlen(ep));
+   sheight = (png_charp)png_malloc_warn(png_ptr, png_strlen(ep) + 1);
+   if (swidth == NULL)
+     {
+       png_warning(png_ptr, "Out of memory while processing sCAL chunk height");
+       return;
+     }
+   png_memcpy(sheight, ep, (png_size_t)png_strlen(ep));
 #endif
 #endif
 
@@ -1816,6 +1841,7 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    png_charp text;
    png_uint_32 skip = 0;
    png_size_t slength;
+   int ret;
 
    png_debug(1, "in png_handle_tEXt\n");
 
@@ -1834,7 +1860,12 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    }
 #endif
 
-   key = (png_charp)png_malloc(png_ptr, length + 1);
+   key = (png_charp)png_malloc_warn(png_ptr, length + 1);
+   if (key == NULL)
+   {
+     png_warning(png_ptr, "No memory to process text chunk.");
+     return;
+   }
    slength = (png_size_t)length;
    png_crc_read(png_ptr, (png_bytep)key, slength);
 
@@ -1852,7 +1883,13 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    if (text != key + slength)
       text++;
 
-   text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
+   text_ptr = (png_textp)png_malloc_warn(png_ptr, (png_uint_32)sizeof(png_text));
+   if (text_ptr == NULL)
+   {
+     png_warning(png_ptr, "Not enough memory to process text chunk.");
+     png_free(png_ptr, key);
+     return;
+   }
    text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
    text_ptr->key = key;
 #ifdef PNG_iTXt_SUPPORTED
@@ -1863,10 +1900,12 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    text_ptr->text = text;
    text_ptr->text_length = png_strlen(text);
 
-   png_set_text(png_ptr, info_ptr, text_ptr, 1);
+   ret=png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
 
    png_free(png_ptr, key);
    png_free(png_ptr, text_ptr);
+   if (ret)
+     png_warning(png_ptr, "Insufficient memory to process text chunk.");
 }
 #endif
 
@@ -1879,6 +1918,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    png_charp chunkdata;
    png_charp text;
    int comp_type;
+   int ret;
    png_size_t slength, prefix_len, data_len;
 
    png_debug(1, "in png_handle_zTXt\n");
@@ -1899,7 +1939,12 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    }
 #endif
 
-   chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
+   chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+   if (chunkdata == NULL)
+   {
+     png_warning(png_ptr,"Out of memory processing zTXt chunk.");
+     return;
+   }
    slength = (png_size_t)length;
    png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
    if (png_crc_finish(png_ptr, 0))
@@ -1922,6 +1967,11 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    else
    {
        comp_type = *(++text);
+       if (comp_type != PNG_TEXT_COMPRESSION_zTXt)
+       {
+          png_warning(png_ptr, "Unknown compression type in zTXt chunk");
+          comp_type = PNG_TEXT_COMPRESSION_zTXt;
+       }
        text++;        /* skip the compression_method byte */
    }
    prefix_len = text - chunkdata;
@@ -1929,7 +1979,13 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    chunkdata = (png_charp)png_decompress_chunk(png_ptr, comp_type, chunkdata,
                                     (png_size_t)length, prefix_len, &data_len);
 
-   text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
+   text_ptr = (png_textp)png_malloc_warn(png_ptr, (png_uint_32)sizeof(png_text));
+   if (text_ptr == NULL)
+   {
+     png_warning(png_ptr,"Not enough memory to process zTXt chunk.");
+     png_free(png_ptr, chunkdata);
+     return;
+   }
    text_ptr->compression = comp_type;
    text_ptr->key = chunkdata;
 #ifdef PNG_iTXt_SUPPORTED
@@ -1940,10 +1996,12 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    text_ptr->text = chunkdata + prefix_len;
    text_ptr->text_length = data_len;
 
-   png_set_text(png_ptr, info_ptr, text_ptr, 1);
+   ret=png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
 
    png_free(png_ptr, text_ptr);
    png_free(png_ptr, chunkdata);
+   if (ret)
+     png_error(png_ptr, "Insufficient memory to store zTXt chunk.");
 }
 #endif
 
@@ -1957,6 +2015,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    png_charp key, lang, text, lang_key;
    int comp_flag;
    int comp_type = 0;
+   int ret;
    png_size_t slength, prefix_len, data_len;
 
    png_debug(1, "in png_handle_iTXt\n");
@@ -1978,7 +2037,12 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    }
 #endif
 
-   chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
+   chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+   if (chunkdata == NULL)
+   {
+     png_warning(png_ptr, "No memory to process iTXt chunk.");
+     return;
+   }
    slength = (png_size_t)length;
    png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
    if (png_crc_finish(png_ptr, 0))
@@ -2024,7 +2088,13 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
           (size_t)length, prefix_len, &data_len);
    else
        data_len=png_strlen(chunkdata + prefix_len);
-   text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text));
+   text_ptr = (png_textp)png_malloc_warn(png_ptr, (png_uint_32)sizeof(png_text));
+   if (text_ptr == NULL)
+   {
+     png_warning(png_ptr,"Not enough memory to process iTXt chunk.");
+     png_free(png_ptr, chunkdata);
+     return;
+   }
    text_ptr->compression = (int)comp_flag + 1;
    text_ptr->lang_key = chunkdata+(lang_key-key);
    text_ptr->lang = chunkdata+(lang-key);
@@ -2033,10 +2103,12 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    text_ptr->key = chunkdata;
    text_ptr->text = chunkdata + prefix_len;
 
-   png_set_text(png_ptr, info_ptr, text_ptr, 1);
+   ret=png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
 
    png_free(png_ptr, text_ptr);
    png_free(png_ptr, chunkdata);
+   if (ret)
+     png_error(png_ptr, "Insufficient memory to store iTXt chunk.");
 }
 #endif
 
@@ -2069,7 +2141,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
       if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
            HANDLE_CHUNK_ALWAYS
 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
-           && png_ptr->read_user_chunk_fn == (png_user_chunk_ptr)NULL
+           && png_ptr->read_user_chunk_fn == NULL
 #endif
         )
 #endif
@@ -2089,12 +2161,12 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
            length = (png_uint_32)65535L;
        }
 #endif
-       strcpy((png_charp)chunk.name, (png_charp)png_ptr->chunk_name);
+       png_strcpy((png_charp)chunk.name, (png_charp)png_ptr->chunk_name);
        chunk.data = (png_bytep)png_malloc(png_ptr, length);
-       png_crc_read(png_ptr, chunk.data, length);
-       chunk.size = length;
+       chunk.size = (png_size_t)length;
+       png_crc_read(png_ptr, (png_bytep)chunk.data, length);
 #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
-       if(png_ptr->read_user_chunk_fn != (png_user_chunk_ptr)NULL)
+       if(png_ptr->read_user_chunk_fn != NULL)
        {
           /* callback to user unknown chunk handler */
           if ((*(png_ptr->read_user_chunk_fn)) (png_ptr, &chunk) <= 0)
@@ -2102,7 +2174,10 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
              if (!(png_ptr->chunk_name[0] & 0x20))
                 if(png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
                      HANDLE_CHUNK_ALWAYS)
+                 {
+                   png_free(png_ptr, chunk.data);
                    png_chunk_error(png_ptr, "unknown critical chunk");
+                 }
              png_set_unknown_chunks(png_ptr, info_ptr, &chunk, 1);
           }
        }
@@ -2118,8 +2193,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
    png_crc_finish(png_ptr, skip);
 
 #if !defined(PNG_READ_USER_CHUNKS_SUPPORTED)
-   if (info_ptr == NULL)
-     /* quiet compiler warnings about unused info_ptr */ ;
+   info_ptr = info_ptr; /* quiet compiler warnings about unused info_ptr */
 #endif
 }
 
@@ -2152,13 +2226,9 @@ png_check_chunk_name(png_structp png_ptr, png_bytep chunk_name)
    a zero indicates the pixel is to be skipped.  This is in addition
    to any alpha or transparency value associated with the pixel.  If
    you want all pixels to be combined, pass 0xff (255) in mask.  */
+#ifndef PNG_HAVE_ASSEMBLER_COMBINE_ROW
 void /* PRIVATE */
-#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
-png_combine_row_c
-#else
-png_combine_row
-#endif /* PNG_HAVE_ASSEMBLER_COMBINE_ROW */
-   (png_structp png_ptr, png_bytep row, int mask)
+png_combine_row(png_structp png_ptr, png_bytep row, int mask)
 {
    png_debug(1,"in png_combine_row\n");
    if (mask == 0xff)
@@ -2358,25 +2428,28 @@ png_combine_row
       }
    }
 }
+#endif /* !PNG_HAVE_ASSEMBLER_COMBINE_ROW */
 
-#if defined(PNG_READ_INTERLACING_SUPPORTED)
-void /* PRIVATE */
-#ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
-png_do_read_interlace_c
-#else
-png_do_read_interlace
-#endif /* PNG_HAVE_ASSEMBLER_READ_INTERLACE */
-   (png_row_infop row_info, png_bytep row, int pass,
+#ifdef PNG_READ_INTERLACING_SUPPORTED
+#ifndef PNG_HAVE_ASSEMBLER_READ_INTERLACE   /* else in pngvcrd.c, pnggccrd.c */
+/* OLD pre-1.0.9 interface:
+void png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
    png_uint_32 transformations)
+ */
+void /* PRIVATE */
+png_do_read_interlace(png_structp png_ptr)
 {
+   png_row_infop row_info = &(png_ptr->row_info);
+   png_bytep row = png_ptr->row_buf + 1;
+   int pass = png_ptr->pass;
+   png_uint_32 transformations = png_ptr->transformations;
 #ifdef PNG_USE_LOCAL_ARRAYS
    /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-
    /* offset to next interlace block */
    const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
 #endif
 
-   png_debug(1,"in png_do_read_interlace\n");
+   png_debug(1,"in png_do_read_interlace (stock C version)\n");
    if (row != NULL && row_info != NULL)
    {
       png_uint_32 final_width;
@@ -2581,20 +2654,15 @@ png_do_read_interlace
          (png_uint_32)row_info->pixel_depth + 7) >> 3);
    }
 #if !defined(PNG_READ_PACKSWAP_SUPPORTED)
-   /* silence compiler warning */
-   if (transformations)
-      return;
+   transformations = transformations; /* silence compiler warning */
 #endif
 }
-#endif
+#endif /* !PNG_HAVE_ASSEMBLER_READ_INTERLACE */
+#endif /* PNG_READ_INTERLACING_SUPPORTED */
 
+#ifndef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
 void /* PRIVATE */
-#ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
-png_read_filter_row_c
-#else
-png_read_filter_row
-#endif /* PNG_HAVE_ASSEMBLER_READ_FILTER_ROW */
-   (png_structp png_ptr, png_row_infop row_info, png_bytep row,
+png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
    png_bytep prev_row, int filter)
 {
    png_debug(1, "in png_read_filter_row\n");
@@ -2715,6 +2783,7 @@ png_read_filter_row
          break;
    }
 }
+#endif /* !PNG_HAVE_ASSEMBLER_READ_FILTER_ROW */
 
 void /* PRIVATE */
 png_read_finish_row(png_structp png_ptr)
@@ -2814,7 +2883,7 @@ png_read_finish_row(png_structp png_ptr)
          {
             if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in ||
                png_ptr->idat_size)
-               png_error(png_ptr, "Extra compressed data");
+               png_warning(png_ptr, "Extra compressed data");
             png_ptr->mode |= PNG_AFTER_IDAT;
             png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
             break;
@@ -2824,14 +2893,19 @@ png_read_finish_row(png_structp png_ptr)
                       "Decompression Error");
 
          if (!(png_ptr->zstream.avail_out))
-            png_error(png_ptr, "Extra compressed data");
+         {
+            png_warning(png_ptr, "Extra compressed data.");
+            png_ptr->mode |= PNG_AFTER_IDAT;
+            png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
+            break;
+         }
 
       }
       png_ptr->zstream.avail_out = 0;
    }
 
    if (png_ptr->idat_size || png_ptr->zstream.avail_in)
-      png_error(png_ptr, "Extra compression data");
+      png_warning(png_ptr, "Extra compression data");
 
    inflateReset(&png_ptr->zstream);
 
@@ -3001,7 +3075,11 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
    if (row_bytes > (png_uint_32)65536L)
       png_error(png_ptr, "This image requires a row greater than 64KB");
 #endif
-   png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, row_bytes);
+   png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes+64);
+   png_ptr->row_buf = png_ptr->big_row_buf+32;
+#if defined(PNG_DEBUG) && defined(PNG_USE_PNGGCCRD)
+   png_ptr->row_buf_size = row_bytes;
+#endif
 
 #ifdef PNG_MAX_MALLOC_64K
    if ((png_uint_32)png_ptr->rowbytes + 1 > (png_uint_32)65536L)

pngset.c

@@ -1,9 +1,9 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -40,6 +40,25 @@ png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
+   if (white_x < 0.0 || white_y < 0.0 ||
+         red_x < 0.0 ||   red_y < 0.0 ||
+       green_x < 0.0 || green_y < 0.0 ||
+        blue_x < 0.0 ||  blue_y < 0.0)
+   {
+      png_warning(png_ptr,
+        "Ignoring attempt to set negative chromaticity value");
+      return;
+   }
+   if (white_x > 21474.83 || white_y > 21474.83 ||
+         red_x > 21474.83 ||   red_y > 21474.83 ||
+       green_x > 21474.83 || green_y > 21474.83 ||
+        blue_x > 21474.83 ||  blue_y > 21474.83)
+   {
+      png_warning(png_ptr,
+        "Ignoring attempt to set chromaticity value exceeding 21474.83");
+      return;
+   }
+
    info_ptr->x_white = (float)white_x;
    info_ptr->y_white = (float)white_y;
    info_ptr->x_red   = (float)red_x;
@@ -51,12 +70,12 @@ png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
 #ifdef PNG_FIXED_POINT_SUPPORTED
    info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
    info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
-   info_ptr->int_x_red   = (png_fixed_point)(red_x*100000.+0.5);
-   info_ptr->int_y_red   = (png_fixed_point)(red_y*100000.+0.5);
+   info_ptr->int_x_red   = (png_fixed_point)(  red_x*100000.+0.5);
+   info_ptr->int_y_red   = (png_fixed_point)(  red_y*100000.+0.5);
    info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
    info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
-   info_ptr->int_x_blue  = (png_fixed_point)(blue_x*100000.+0.5);
-   info_ptr->int_y_blue  = (png_fixed_point)(blue_y*100000.+0.5);
+   info_ptr->int_x_blue  = (png_fixed_point)( blue_x*100000.+0.5);
+   info_ptr->int_y_blue  = (png_fixed_point)( blue_y*100000.+0.5);
 #endif
    info_ptr->valid |= PNG_INFO_cHRM;
 }
@@ -72,6 +91,24 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
+   if (white_x < 0 || white_y < 0 ||
+         red_x < 0 ||   red_y < 0 ||
+       green_x < 0 || green_y < 0 ||
+        blue_x < 0 ||  blue_y < 0)
+   {
+      png_warning(png_ptr,
+        "Ignoring attempt to set negative chromaticity value");
+      return;
+   }
+   if (white_x > (double) PNG_MAX_UINT || white_y > (double) PNG_MAX_UINT ||
+         red_x > (double) PNG_MAX_UINT ||   red_y > (double) PNG_MAX_UINT ||
+       green_x > (double) PNG_MAX_UINT || green_y > (double) PNG_MAX_UINT ||
+        blue_x > (double) PNG_MAX_UINT ||  blue_y > (double) PNG_MAX_UINT)
+   {
+      png_warning(png_ptr,
+        "Ignoring attempt to set chromaticity value exceeding 21474.83");
+      return;
+   }
    info_ptr->int_x_white = white_x;
    info_ptr->int_y_white = white_y;
    info_ptr->int_x_red   = red_x;
@@ -83,12 +120,12 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
 #ifdef PNG_FLOATING_POINT_SUPPORTED
    info_ptr->x_white = (float)(white_x/100000.);
    info_ptr->y_white = (float)(white_y/100000.);
-   info_ptr->x_red   = (float)(red_x/100000.);
-   info_ptr->y_red   = (float)(red_y/100000.);
+   info_ptr->x_red   = (float)(  red_x/100000.);
+   info_ptr->y_red   = (float)(  red_y/100000.);
    info_ptr->x_green = (float)(green_x/100000.);
    info_ptr->y_green = (float)(green_y/100000.);
-   info_ptr->x_blue  = (float)(blue_x/100000.);
-   info_ptr->y_blue  = (float)(blue_y/100000.);
+   info_ptr->x_blue  = (float)( blue_x/100000.);
+   info_ptr->y_blue  = (float)( blue_y/100000.);
 #endif
    info_ptr->valid |= PNG_INFO_cHRM;
 }
@@ -100,45 +137,103 @@ png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
 void PNGAPI
 png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
 {
+   double gamma;
    png_debug1(1, "in %s storage function\n", "gAMA");
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
-   info_ptr->gamma = (float)file_gamma;
+   /* Check for overflow */
+   if (file_gamma > 21474.83)
+   {
+      png_warning(png_ptr, "Limiting gamma to 21474.83");
+      gamma=21474.83;
+   }
+   else
+      gamma=file_gamma;
+   info_ptr->gamma = (float)gamma;
 #ifdef PNG_FIXED_POINT_SUPPORTED
-   info_ptr->int_gamma = (int)(file_gamma*100000.+.5);
+   info_ptr->int_gamma = (int)(gamma*100000.+.5);
 #endif
    info_ptr->valid |= PNG_INFO_gAMA;
+   if(gamma == 0.0)
+      png_warning(png_ptr, "Setting gamma=0");
 }
 #endif
-#endif
 void PNGAPI
 png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
    int_gamma)
 {
+   png_fixed_point gamma;
+
    png_debug1(1, "in %s storage function\n", "gAMA");
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
+   if (int_gamma > (png_fixed_point) PNG_MAX_UINT)
+   {
+     png_warning(png_ptr, "Limiting gamma to 21474.83");
+     gamma=PNG_MAX_UINT;
+   }
+   else
+   {
+     if (int_gamma < 0)
+     {
+       png_warning(png_ptr, "Setting negative gamma to zero");
+       gamma=0;
+     }
+     else
+       gamma=int_gamma;
+   }
 #ifdef PNG_FLOATING_POINT_SUPPORTED
-   info_ptr->gamma = (float)(int_gamma/100000.);
+   info_ptr->gamma = (float)(gamma/100000.);
 #endif
 #ifdef PNG_FIXED_POINT_SUPPORTED
-   info_ptr->int_gamma = int_gamma;
+   info_ptr->int_gamma = gamma;
 #endif
    info_ptr->valid |= PNG_INFO_gAMA;
+   if(gamma == 0)
+      png_warning(png_ptr, "Setting gamma=0");
 }
+#endif
 
 #if defined(PNG_hIST_SUPPORTED)
 void PNGAPI
 png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
 {
+   int i;
+
    png_debug1(1, "in %s storage function\n", "hIST");
    if (png_ptr == NULL || info_ptr == NULL)
       return;
+   if (info_ptr->num_palette == 0)
+   {
+       png_warning(png_ptr,
+          "Palette size 0, hIST allocation skipped.");
+       return;
+   }
 
-   info_ptr->hist = hist;
+#ifdef PNG_FREE_ME_SUPPORTED
+   png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
+#endif
+   /* Changed from info->num_palette to 256 in version 1.2.1 */
+   png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
+      (png_uint_32)(256 * sizeof (png_uint_16)));
+   if (png_ptr->hist == NULL)
+     {
+       png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
+       return;
+     }
+
+   for (i = 0; i < info_ptr->num_palette; i++)
+       png_ptr->hist[i] = hist[i];
+   info_ptr->hist = png_ptr->hist;
    info_ptr->valid |= PNG_INFO_hIST;
+
+#ifdef PNG_FREE_ME_SUPPORTED
+   info_ptr->free_me |= PNG_FREE_HIST;
+#else
+   png_ptr->flags |= PNG_FLAG_FREE_HIST;
+#endif
 }
 #endif
 
@@ -153,6 +248,61 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
+   /* check for width and height valid values */
+   if (width == 0 || height == 0)
+      png_error(png_ptr, "Image width or height is zero in IHDR");
+   if (width > PNG_MAX_UINT || height > PNG_MAX_UINT)
+      png_error(png_ptr, "Invalid image size in IHDR");
+
+   /* check other values */
+   if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
+      bit_depth != 8 && bit_depth != 16)
+      png_error(png_ptr, "Invalid bit depth in IHDR");
+
+   if (color_type < 0 || color_type == 1 ||
+      color_type == 5 || color_type > 6)
+      png_error(png_ptr, "Invalid color type in IHDR");
+
+   if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
+       ((color_type == PNG_COLOR_TYPE_RGB ||
+         color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
+         color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
+      png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
+
+   if (interlace_type >= PNG_INTERLACE_LAST)
+      png_error(png_ptr, "Unknown interlace method in IHDR");
+
+   if (compression_type != PNG_COMPRESSION_TYPE_BASE)
+      png_error(png_ptr, "Unknown compression method in IHDR");
+
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
+   /* Accept filter_method 64 (intrapixel differencing) only if
+    * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
+    * 2. Libpng did not read a PNG signature (this filter_method is only
+    *    used in PNG datastreams that are embedded in MNG datastreams) and
+    * 3. The application called png_permit_mng_features with a mask that
+    *    included PNG_FLAG_MNG_FILTER_64 and
+    * 4. The filter_method is 64 and
+    * 5. The color_type is RGB or RGBA
+    */
+   if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
+      png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
+   if(filter_type != PNG_FILTER_TYPE_BASE)
+   {
+     if(!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+        (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
+        ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
+        (color_type == PNG_COLOR_TYPE_RGB || 
+         color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
+        png_error(png_ptr, "Unknown filter method in IHDR");
+     if(png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
+        png_warning(png_ptr, "Invalid filter method in IHDR");
+   }
+#else
+   if(filter_type != PNG_FILTER_TYPE_BASE)
+      png_error(png_ptr, "Unknown filter method in IHDR");
+#endif
+
    info_ptr->width = width;
    info_ptr->height = height;
    info_ptr->bit_depth = (png_byte)bit_depth;
@@ -172,7 +322,7 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
 
    /* check for overflow */
    rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3;
-   if (( width > PNG_MAX_UINT/rowbytes_per_pixel))
+   if ( width > PNG_MAX_UINT/rowbytes_per_pixel - 64)
    {
       png_warning(png_ptr,
          "Width too large to process image data; rowbytes will overflow.");
@@ -213,7 +363,12 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
 
    length = png_strlen(purpose) + 1;
    png_debug1(3, "allocating purpose for info (%lu bytes)\n", length);
-   info_ptr->pcal_purpose = (png_charp)png_malloc(png_ptr, length);
+   info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
+   if (info_ptr->pcal_purpose == NULL)
+     {
+       png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
+       return;
+     }
    png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
 
    png_debug(3, "storing X0, X1, type, and nparams in info\n");
@@ -224,18 +379,34 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
 
    length = png_strlen(units) + 1;
    png_debug1(3, "allocating units for info (%lu bytes)\n", length);
-   info_ptr->pcal_units = (png_charp)png_malloc(png_ptr, length);
+   info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
+   if (info_ptr->pcal_units == NULL)
+     {
+       png_warning(png_ptr, "Insufficient memory for pCAL units.");
+       return;
+     }
    png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
 
-   info_ptr->pcal_params = (png_charpp)png_malloc(png_ptr,
+   info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
       (png_uint_32)((nparams + 1) * sizeof(png_charp)));
+   if (info_ptr->pcal_params == NULL)
+     {
+       png_warning(png_ptr, "Insufficient memory for pCAL params.");
+       return;
+     }
+
    info_ptr->pcal_params[nparams] = NULL;
 
    for (i = 0; i < nparams; i++)
    {
       length = png_strlen(params[i]) + 1;
       png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i, length);
-      info_ptr->pcal_params[i] = (png_charp)png_malloc(png_ptr, length);
+      info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
+      if (info_ptr->pcal_params[i] == NULL)
+        {
+          png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
+          return;
+        }
       png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
    }
 
@@ -283,7 +454,7 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
 
    length = png_strlen(sheight) + 1;
    png_debug1(3, "allocating unit for info (%d bytes)\n", length);
-   info_ptr->scal_s_width = (png_charp)png_malloc(png_ptr, length);
+   info_ptr->scal_s_height = (png_charp)png_malloc(png_ptr, length);
    png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
 
    info_ptr->valid |= PNG_INFO_sCAL;
@@ -320,9 +491,30 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
-   info_ptr->palette = palette;
+   /*
+    * It may not actually be necessary to set png_ptr->palette here;
+    * we do it for backward compatibility with the way the png_handle_tRNS
+    * function used to do the allocation.
+    */
+#ifdef PNG_FREE_ME_SUPPORTED
+   png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
+#endif
+   /* Changed in libpng-1.2.1 to allocate 256 instead of num_palette entries,
+      in case of an invalid PNG file that has too-large sample values. */
+   png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)256,
+      sizeof (png_color));
+   if (png_ptr->palette == NULL)
+      png_error(png_ptr, "Unable to malloc palette");
+   png_memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color));
+   info_ptr->palette = png_ptr->palette;
+   info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
+
+#ifdef PNG_FREE_ME_SUPPORTED
+   info_ptr->free_me |= PNG_FREE_PLTE;
+#else
+   png_ptr->flags |= PNG_FLAG_FREE_PLTE;
+#endif
 
-   info_ptr->num_palette = (png_uint_16)num_palette;
    info_ptr->valid |= PNG_INFO_PLTE;
 }
 
@@ -436,9 +628,9 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
    if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
       return;
 
-   new_iccp_name = png_malloc(png_ptr, png_strlen(name)+1);
-   strcpy(new_iccp_name, name);
-   new_iccp_profile = png_malloc(png_ptr, proflen);
+   new_iccp_name = (png_charp)png_malloc(png_ptr, png_strlen(name)+1);
+   png_strcpy(new_iccp_name, name);
+   new_iccp_profile = (png_charp)png_malloc(png_ptr, proflen);
    png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
 
    png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
@@ -460,6 +652,16 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
 void PNGAPI
 png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
    int num_text)
+{
+   int ret;
+   ret=png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
+   if (ret)
+     png_error(png_ptr, "Insufficient memory to store text");
+}
+
+int /* PRIVATE */
+png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
+   int num_text)
 {
    int i;
 
@@ -467,7 +669,7 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
       "text" : (png_const_charp)png_ptr->chunk_name));
 
    if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
-      return;
+      return(0);
 
    /* Make sure we have enough space in the "text" array in info_struct
     * to hold all of the incoming text_ptr objects.
@@ -482,8 +684,13 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
          old_max = info_ptr->max_text;
          info_ptr->max_text = info_ptr->num_text + num_text + 8;
          old_text = info_ptr->text;
-         info_ptr->text = (png_textp)png_malloc(png_ptr,
+         info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
             (png_uint_32)(info_ptr->max_text * sizeof (png_text)));
+         if (info_ptr->text == NULL)
+           {
+             png_free(png_ptr, old_text);
+             return(1);
+           }
          png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
             sizeof(png_text)));
          png_free(png_ptr, old_text);
@@ -492,8 +699,10 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
       {
          info_ptr->max_text = num_text + 8;
          info_ptr->num_text = 0;
-         info_ptr->text = (png_textp)png_malloc(png_ptr,
+         info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
             (png_uint_32)(info_ptr->max_text * sizeof (png_text)));
+         if (info_ptr->text == NULL)
+           return(1);
 #ifdef PNG_FREE_ME_SUPPORTED
          info_ptr->free_me |= PNG_FREE_TEXT;
 #endif
@@ -507,7 +716,7 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
       png_size_t lang_len,lang_key_len;
       png_textp textp = &(info_ptr->text[info_ptr->num_text]);
 
-      if (text_ptr[i].key == (png_charp)NULL)
+      if (text_ptr[i].key == NULL)
           continue;
 
       key_len = png_strlen(text_ptr[i].key);
@@ -521,11 +730,11 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
 #ifdef PNG_iTXt_SUPPORTED
       {
         /* set iTXt data */
-        if (text_ptr[i].key != (png_charp)NULL)
+        if (text_ptr[i].lang != NULL)
           lang_len = png_strlen(text_ptr[i].lang);
         else
           lang_len = 0;
-        if (text_ptr[i].lang_key != (png_charp)NULL)
+        if (text_ptr[i].lang_key != NULL)
           lang_key_len = png_strlen(text_ptr[i].lang_key);
         else
           lang_key_len = 0;
@@ -537,7 +746,7 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
       }
 #endif
 
-      if (text_ptr[i].text == (png_charp)NULL || text_ptr[i].text[0] == '\0')
+      if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
       {
          text_length = 0;
 #ifdef PNG_iTXt_SUPPORTED
@@ -553,10 +762,13 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
          textp->compression = text_ptr[i].compression;
       }
 
-      textp->key = (png_charp)png_malloc(png_ptr,
+      textp->key = (png_charp)png_malloc_warn(png_ptr,
          (png_uint_32)(key_len + text_length + lang_len + lang_key_len + 4));
-      png_debug2(2, "Allocated %d bytes at %x in png_set_text\n",
-         key_len + lang_len + lang_key_len + text_length + 4, (int)textp->key);
+      if (textp->key == NULL)
+        return(1);
+      png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
+         (png_uint_32)(key_len + lang_len + lang_key_len + text_length + 4),
+         (int)textp->key);
 
       png_memcpy(textp->key, text_ptr[i].key,
          (png_size_t)(key_len));
@@ -576,8 +788,8 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
 #endif
       {
 #ifdef PNG_iTXt_SUPPORTED
-         textp->lang=(png_charp)NULL;
-         textp->lang_key=(png_charp)NULL;
+         textp->lang=NULL;
+         textp->lang_key=NULL;
 #endif
          textp->text=textp->key + key_len + 1;
       }
@@ -604,6 +816,7 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
       info_ptr->num_text++;
       png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
    }
+   return(0);
 }
 #endif
 
@@ -631,7 +844,25 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
       return;
 
    if (trans != NULL)
-      info_ptr->trans = trans;
+   {
+       /*
+        * It may not actually be necessary to set png_ptr->trans here;
+        * we do it for backward compatibility with the way the png_handle_tRNS
+        * function used to do the allocation.
+        */
+#ifdef PNG_FREE_ME_SUPPORTED
+       png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
+#endif
+       /* Changed from num_trans to 256 in version 1.2.1 */
+       png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
+           (png_uint_32)256);
+       png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
+#ifdef PNG_FREE_ME_SUPPORTED
+       info_ptr->free_me |= PNG_FREE_TRNS;
+#else
+       png_ptr->flags |= PNG_FLAG_FREE_TRNS;
+#endif
+   }
 
    if (trans_values != NULL)
    {
@@ -653,8 +884,13 @@ png_set_sPLT(png_structp png_ptr,
     png_sPLT_tp np;
     int i;
 
-    np = (png_sPLT_tp)png_malloc(png_ptr,
+    np = (png_sPLT_tp)png_malloc_warn(png_ptr,
         (info_ptr->splt_palettes_num + nentries) * sizeof(png_sPLT_t));
+    if (np == NULL)
+    {
+      png_warning(png_ptr, "No memory for sPLT palettes.");
+      return;
+    }
 
     png_memcpy(np, info_ptr->splt_palettes,
            info_ptr->splt_palettes_num * sizeof(png_sPLT_t));
@@ -667,12 +903,12 @@ png_set_sPLT(png_structp png_ptr,
         png_sPLT_tp from = entries + i;
 
         to->name = (png_charp)png_malloc(png_ptr,
-                                        png_strlen(from->name) + 1);
+            png_strlen(from->name) + 1);
         png_strcpy(to->name, from->name);
         to->entries = (png_sPLT_entryp)png_malloc(png_ptr,
-                                 from->nentries * sizeof(png_sPLT_t));
+            from->nentries * sizeof(png_sPLT_t));
         png_memcpy(to->entries, from->entries,
-               from->nentries * sizeof(png_sPLT_t));
+            from->nentries * sizeof(png_sPLT_t));
         to->nentries = from->nentries;
         to->depth = from->depth;
     }
@@ -686,7 +922,7 @@ png_set_sPLT(png_structp png_ptr,
 }
 #endif /* PNG_sPLT_SUPPORTED */
 
-#if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
 void PNGAPI
 png_set_unknown_chunks(png_structp png_ptr,
    png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
@@ -697,9 +933,14 @@ png_set_unknown_chunks(png_structp png_ptr,
     if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
         return;
 
-    np = (png_unknown_chunkp)png_malloc(png_ptr,
+    np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
         (info_ptr->unknown_chunks_num + num_unknowns) *
         sizeof(png_unknown_chunk));
+    if (np == NULL)
+    {
+       png_warning(png_ptr, "Out of memory while processing unknown chunk.");
+       return;
+    }
 
     png_memcpy(np, info_ptr->unknown_chunks,
            info_ptr->unknown_chunks_num * sizeof(png_unknown_chunk));
@@ -713,11 +954,16 @@ png_set_unknown_chunks(png_structp png_ptr,
 
         png_strcpy((png_charp)to->name, (png_charp)from->name);
         to->data = (png_bytep)png_malloc(png_ptr, from->size);
-        png_memcpy(to->data, from->data, from->size);
-        to->size = from->size;
+        if (to->data == NULL)
+           png_warning(png_ptr, "Out of memory while processing unknown chunk.");
+        else
+        {
+          png_memcpy(to->data, from->data, from->size);
+          to->size = from->size;
 
-        /* note our location in the read or write sequence */
-        to->location = (png_byte)(png_ptr->mode & 0xff);
+          /* note our location in the read or write sequence */
+          to->location = (png_byte)(png_ptr->mode & 0xff);
+        }
     }
 
     info_ptr->unknown_chunks = np;
@@ -788,14 +1034,17 @@ png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
     if (chunk_list == NULL)
       return;
     old_num_chunks=png_ptr->num_chunk_list;
-    new_list=png_malloc(png_ptr,5*(num_chunks+old_num_chunks));
-    if(png_ptr->chunk_list != (png_bytep)NULL)
+    new_list=(png_bytep)png_malloc(png_ptr,
+       (png_uint_32)(5*(num_chunks+old_num_chunks)));
+    if(png_ptr->chunk_list != NULL)
     {
-       png_memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks);
+       png_memcpy(new_list, png_ptr->chunk_list,
+          (png_size_t)(5*old_num_chunks));
        png_free(png_ptr, png_ptr->chunk_list);
        png_ptr->chunk_list=NULL;
     }
-    png_memcpy(new_list+5*old_num_chunks, chunk_list, 5*num_chunks);
+    png_memcpy(new_list+5*old_num_chunks, chunk_list,
+       (png_size_t)(5*num_chunks));
     for (p=new_list+5*old_num_chunks+4, i=0; i<num_chunks; i++, p+=5)
        *p=(png_byte)keep;
     png_ptr->num_chunk_list=old_num_chunks+num_chunks;
@@ -831,7 +1080,6 @@ png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
    info_ptr->row_pointers = row_pointers;
    if(row_pointers)
       info_ptr->valid |= PNG_INFO_IDAT;
-
 }
 #endif
 
@@ -842,8 +1090,6 @@ png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
        png_free(png_ptr, png_ptr->zbuf);
     png_ptr->zbuf_size = (png_size_t)size;
     png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
-    if(!png_ptr->zbuf)
-       png_error(png_ptr,"Unable to malloc zbuf");
     png_ptr->zstream.next_out = png_ptr->zbuf;
     png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
 }
@@ -854,3 +1100,61 @@ png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
    if (png_ptr && info_ptr)
       info_ptr->valid &= ~(mask);
 }
+
+
+#ifndef PNG_1_0_X
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+/* this function was added to libpng 1.2.0 and should always exist by default */
+void PNGAPI
+png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
+{
+    png_uint_32 settable_asm_flags;
+    png_uint_32 settable_mmx_flags;
+
+    settable_mmx_flags =
+#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
+                         PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  |
+#endif
+#ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
+                         PNG_ASM_FLAG_MMX_READ_INTERLACE    |
+#endif
+#ifdef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
+                         PNG_ASM_FLAG_MMX_READ_FILTER_SUB   |
+                         PNG_ASM_FLAG_MMX_READ_FILTER_UP    |
+                         PNG_ASM_FLAG_MMX_READ_FILTER_AVG   |
+                         PNG_ASM_FLAG_MMX_READ_FILTER_PAETH |
+#endif
+                         0;
+
+    /* could be some non-MMX ones in the future, but not currently: */
+    settable_asm_flags = settable_mmx_flags;
+
+    if (!(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED) ||
+        !(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU))
+    {
+        /* clear all MMX flags if MMX isn't supported */
+        settable_asm_flags &= ~settable_mmx_flags;
+        png_ptr->asm_flags &= ~settable_mmx_flags;
+    }
+
+    /* we're replacing the settable bits with those passed in by the user,
+     * so first zero them out of the master copy, then logical-OR in the
+     * allowed subset that was requested */
+
+    png_ptr->asm_flags &= ~settable_asm_flags;               /* zero them */
+    png_ptr->asm_flags |= (asm_flags & settable_asm_flags);  /* set them */
+}
+#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
+
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+/* this function was added to libpng 1.2.0 */
+void PNGAPI
+png_set_mmx_thresholds (png_structp png_ptr,
+                        png_byte mmx_bitdepth_threshold,
+                        png_uint_32 mmx_rowbytes_threshold)
+{
+    png_ptr->mmx_bitdepth_threshold = mmx_bitdepth_threshold;
+    png_ptr->mmx_rowbytes_threshold = mmx_rowbytes_threshold;
+}
+#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
+#endif /* ?PNG_1_0_X */

pngtest.c

@@ -1,9 +1,9 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -50,9 +50,21 @@
 #  define FCLOSE(file) fclose(file)
 #endif
 
+#if defined(PNG_NO_STDIO)
+#  if defined(_WIN32_WCE)
+     typedef HANDLE                png_FILE_p;
+#  else
+     typedef FILE                * png_FILE_p;
+#  endif
+#endif
+
 /* Makes pngtest verbose so we can find problems (needs to be before png.h) */
 #ifndef PNG_DEBUG
-#define PNG_DEBUG 0
+#  define PNG_DEBUG 0
+#endif
+
+#if !PNG_DEBUG
+#  define SINGLE_ROWBUF_ALLOC  /* makes buffer overruns easier to nail */
 #endif
 
 /* Turn on CPU timing
@@ -105,8 +117,14 @@ static int status_dots_requested=0;
 static int status_dots=1;
 
 void
+#ifdef PNG_1_0_X
+PNGAPI
+#endif
 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
 void
+#ifdef PNG_1_0_X
+PNGAPI
+#endif
 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 {
     if(png_ptr == NULL || row_number > PNG_MAX_UINT) return;
@@ -126,8 +144,14 @@ read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 }
 
 void
+#ifdef PNG_1_0_X
+PNGAPI
+#endif
 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
 void
+#ifdef PNG_1_0_X
+PNGAPI
+#endif
 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 {
     if(png_ptr == NULL || row_number > PNG_MAX_UINT || pass > 7) return;
@@ -141,8 +165,14 @@ write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
    5 in case illegal filter values are present.) */
 static png_uint_32 filters_used[256];
 void
+#ifdef PNG_1_0_X
+PNGAPI
+#endif
 count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data);
 void
+#ifdef PNG_1_0_X
+PNGAPI
+#endif
 count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 {
     if(png_ptr != NULL && row_info != NULL)
@@ -157,8 +187,14 @@ count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 static png_uint_32 zero_samples;
 
 void
+#ifdef PNG_1_0_X
+PNGAPI
+#endif
 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data);
 void
+#ifdef PNG_1_0_X
+PNGAPI
+#endif
 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 {
    png_bytep dp = data;
@@ -257,6 +293,7 @@ static int wrote_question = 0;
    not reading from a standard C stream, you should create a replacement
    read_data function and use it at run time with png_set_read_fn(), rather
    than changing the library. */
+
 #ifndef USE_FAR_KEYWORD
 static void
 pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
@@ -270,7 +307,7 @@ pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 
    if (check != length)
    {
-      png_error(png_ptr, "Read Error");
+      png_error(png_ptr, "Read Error!");
    }
 }
 #else
@@ -457,10 +494,8 @@ static int maximum_allocation = 0;
 static int total_allocation = 0;
 static int num_allocations = 0;
 
-extern PNG_EXPORT(png_voidp,png_debug_malloc) PNGARG((png_structp png_ptr,
-   png_uint_32 size));
-extern PNG_EXPORT(void,png_debug_free) PNGARG((png_structp png_ptr,
-   png_voidp ptr));
+png_voidp png_debug_malloc PNGARG((png_structp png_ptr, png_uint_32 size));
+void png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
 
 png_voidp
 png_debug_malloc(png_structp png_ptr, png_uint_32 size)
@@ -470,26 +505,27 @@ png_debug_malloc(png_structp png_ptr, png_uint_32 size)
       png_debug_malloc directly, with png_ptr == NULL which is OK */
 
    if (size == 0)
-      return (png_voidp)(NULL);
+      return (NULL);
 
    /* This calls the library allocator twice, once to get the requested
       buffer and once to get a new free list entry. */
    {
-      memory_infop pinfo = png_malloc_default(png_ptr, sizeof *pinfo);
+      memory_infop pinfo = (memory_infop)png_malloc_default(png_ptr,
+         (png_uint_32)sizeof *pinfo);
       pinfo->size = size;
       current_allocation += size;
       total_allocation += size;
       num_allocations ++;
       if (current_allocation > maximum_allocation)
          maximum_allocation = current_allocation;
-      pinfo->pointer = png_malloc_default(png_ptr, size);
+      pinfo->pointer = (png_voidp)png_malloc_default(png_ptr, size);
       pinfo->next = pinformation;
       pinformation = pinfo;
       /* Make sure the caller isn't assuming zeroed memory. */
       png_memset(pinfo->pointer, 0xdd, pinfo->size);
 #if PNG_DEBUG
       if(verbose)
-         printf("png_malloc %d bytes at %x\n",size,pinfo->pointer);
+         printf("png_malloc %lu bytes at %x\n",size,pinfo->pointer);
 #endif
       assert(pinfo->size != 12345678);
       return (png_voidp)(pinfo->pointer);
@@ -524,14 +560,14 @@ png_debug_free(png_structp png_ptr, png_voidp ptr)
                fprintf(STDERR, "Duplicate free of memory\n");
             /* We must free the list element too, but first kill
                the memory that is to be freed. */
-            memset(ptr, 0x55, pinfo->size);
+            png_memset(ptr, 0x55, pinfo->size);
             png_free_default(png_ptr, pinfo);
             pinfo=NULL;
             break;
          }
          if (pinfo->next == NULL)
          {
-            fprintf(STDERR, "Pointer %x not found\n", ptr);
+            fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr);
             break;
          }
          ppinfo = &pinfo->next;
@@ -555,8 +591,17 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 {
    static png_FILE_p fpin;
    static png_FILE_p fpout;  /* "static" prevents setjmp corruption */
-   png_structp read_ptr, write_ptr;
-   png_infop read_info_ptr, write_info_ptr, end_info_ptr, write_end_info_ptr;
+   png_structp read_ptr;
+   png_infop read_info_ptr, end_info_ptr;
+#ifdef PNG_WRITE_SUPPORTED
+   png_structp write_ptr;
+   png_infop write_info_ptr;
+   png_infop write_end_info_ptr;
+#else
+   png_structp write_ptr = NULL;
+   png_infop write_info_ptr = NULL;
+   png_infop write_end_info_ptr = NULL;
+#endif
    png_bytep row_buf;
    png_uint_32 y;
    png_uint_32 width, height;
@@ -573,7 +618,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #endif
    char inbuf[256], outbuf[256];
 
-   row_buf = (png_bytep)NULL;
+   row_buf = NULL;
 
 #if defined(_WIN32_WCE)
    MultiByteToWideChar(CP_ACP, 0, inname, -1, path, MAX_PATH);
@@ -600,35 +645,37 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 
    png_debug(0, "Allocating read and write structures\n");
 #ifdef PNG_USER_MEM_SUPPORTED
-   read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
-      (png_error_ptr)NULL, (png_error_ptr)NULL, (png_voidp)NULL,
+   read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+      png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
       (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
 #else
-   read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
-      (png_error_ptr)NULL, (png_error_ptr)NULL);
+   read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+      png_error_ptr_NULL, png_error_ptr_NULL);
 #endif
 #if defined(PNG_NO_STDIO)
    png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error,
        pngtest_warning);
 #endif
+#ifdef PNG_WRITE_SUPPORTED
 #ifdef PNG_USER_MEM_SUPPORTED
-   write_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
-      (png_error_ptr)NULL, (png_error_ptr)NULL, (png_voidp)NULL,
+   write_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+      png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
       (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
 #else
-   write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
-      (png_error_ptr)NULL, (png_error_ptr)NULL);
+   write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
+      png_error_ptr_NULL, png_error_ptr_NULL);
 #endif
 #if defined(PNG_NO_STDIO)
    png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error,
        pngtest_warning);
+#endif
 #endif
    png_debug(0, "Allocating read_info, write_info and end_info structures\n");
    read_info_ptr = png_create_info_struct(read_ptr);
-   write_info_ptr = png_create_info_struct(write_ptr);
    end_info_ptr = png_create_info_struct(read_ptr);
+#ifdef PNG_WRITE_SUPPORTED
+   write_info_ptr = png_create_info_struct(write_ptr);
    write_end_info_ptr = png_create_info_struct(write_ptr);
-#ifdef PNG_USER_MEM_SUPPORTED
 #endif
 
 #ifdef PNG_SETJMP_SUPPORTED
@@ -640,9 +687,13 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #endif
    {
       fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
+      if (row_buf)
+         png_free(read_ptr, row_buf);
       png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
+#ifdef PNG_WRITE_SUPPORTED
       png_destroy_info_struct(write_ptr, &write_end_info_ptr);
       png_destroy_write_struct(&write_ptr, &write_info_ptr);
+#endif
       FCLOSE(fpin);
       FCLOSE(fpout);
       return (1);
@@ -651,6 +702,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
    png_memcpy(png_jmpbuf(read_ptr),jmpbuf,sizeof(jmp_buf));
 #endif
 
+#ifdef PNG_WRITE_SUPPORTED
    png_debug(0, "Setting jmpbuf for write struct\n");
 #ifdef USE_FAR_KEYWORD
    if (setjmp(jmpbuf))
@@ -661,7 +713,9 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
       png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
       png_destroy_info_struct(write_ptr, &write_end_info_ptr);
+#ifdef PNG_WRITE_SUPPORTED
       png_destroy_write_struct(&write_ptr, &write_info_ptr);
+#endif
       FCLOSE(fpin);
       FCLOSE(fpout);
       return (1);
@@ -669,30 +723,39 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #ifdef USE_FAR_KEYWORD
    png_memcpy(png_jmpbuf(write_ptr),jmpbuf,sizeof(jmp_buf));
 #endif
+#endif
 #endif
 
    png_debug(0, "Initializing input and output streams\n");
 #if !defined(PNG_NO_STDIO)
    png_init_io(read_ptr, fpin);
+#  ifdef PNG_WRITE_SUPPORTED
    png_init_io(write_ptr, fpout);
+#  endif
 #else
    png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
+#  ifdef PNG_WRITE_SUPPORTED
    png_set_write_fn(write_ptr, (png_voidp)fpout,  pngtest_write_data,
-#if defined(PNG_WRITE_FLUSH_SUPPORTED)
+#    if defined(PNG_WRITE_FLUSH_SUPPORTED)
       pngtest_flush);
-#else
+#    else
       NULL);
-#endif
+#    endif
+#  endif
 #endif
    if(status_dots_requested == 1)
    {
+#ifdef PNG_WRITE_SUPPORTED
       png_set_write_status_fn(write_ptr, write_row_callback);
+#endif
       png_set_read_status_fn(read_ptr, read_row_callback);
    }
    else
    {
-      png_set_write_status_fn(write_ptr, NULL);
-      png_set_read_status_fn(read_ptr, NULL);
+#ifdef PNG_WRITE_SUPPORTED
+      png_set_write_status_fn(write_ptr, png_write_status_ptr_NULL);
+#endif
+      png_set_read_status_fn(read_ptr, png_read_status_ptr_NULL);
    }
 
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
@@ -711,10 +774,12 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #define HANDLE_CHUNK_IF_SAFE      2
 #define HANDLE_CHUNK_ALWAYS       3
 #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
-   png_set_keep_unknown_chunks(read_ptr, HANDLE_CHUNK_ALWAYS, NULL, 0);
+   png_set_keep_unknown_chunks(read_ptr, HANDLE_CHUNK_ALWAYS,
+      png_bytep_NULL, 0);
 #endif
 #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
-   png_set_keep_unknown_chunks(write_ptr, HANDLE_CHUNK_IF_SAFE, NULL, 0);
+   png_set_keep_unknown_chunks(write_ptr, HANDLE_CHUNK_IF_SAFE,
+      png_bytep_NULL, 0);
 #endif
 
    png_debug(0, "Reading info struct\n");
@@ -975,32 +1040,29 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
    }
 #endif
 
+#ifdef PNG_WRITE_SUPPORTED
    png_debug(0, "\nWriting info struct\n");
 
 /* If we wanted, we could write info in two steps:
    png_write_info_before_PLTE(write_ptr, write_info_ptr);
  */
    png_write_info(write_ptr, write_info_ptr);
+#endif
 
-   png_debug(0, "\nAllocating row buffer \n");
+#ifdef SINGLE_ROWBUF_ALLOC
+   png_debug(0, "\nAllocating row buffer...");
    row_buf = (png_bytep)png_malloc(read_ptr,
       png_get_rowbytes(read_ptr, read_info_ptr));
-   if (row_buf == NULL)
-   {
-      fprintf(STDERR, "No memory to allocate row buffer\n");
-      png_destroy_read_struct(&read_ptr, &read_info_ptr, (png_infopp)NULL);
-      png_destroy_info_struct(write_ptr, &write_end_info_ptr);
-      png_destroy_write_struct(&write_ptr, &write_info_ptr);
-      FCLOSE(fpin);
-      FCLOSE(fpout);
-      return (1);
-   }
+   png_debug1(0, "0x%08lx\n\n", (unsigned long)row_buf);
+#endif /* SINGLE_ROWBUF_ALLOC */
    png_debug(0, "Writing row data\n");
 
 #if defined(PNG_READ_INTERLACING_SUPPORTED) || \
   defined(PNG_WRITE_INTERLACING_SUPPORTED)
    num_pass = png_set_interlace_handling(read_ptr);
+#  ifdef PNG_WRITE_SUPPORTED
    png_set_interlace_handling(write_ptr);
+#  endif
 #else
    num_pass=1;
 #endif
@@ -1015,7 +1077,16 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       png_debug1(0, "Writing row data for pass %d\n",pass);
       for (y = 0; y < height; y++)
       {
-         png_read_rows(read_ptr, (png_bytepp)&row_buf, (png_bytepp)NULL, 1);
+#ifndef SINGLE_ROWBUF_ALLOC
+         png_debug2(0, "\nAllocating row buffer (pass %d, y = %ld)...", pass,y);
+         row_buf = (png_bytep)png_malloc(read_ptr,
+            png_get_rowbytes(read_ptr, read_info_ptr));
+         png_debug2(0, "0x%08lx (%ld bytes)\n", (unsigned long)row_buf,
+            png_get_rowbytes(read_ptr, read_info_ptr));
+#endif /* !SINGLE_ROWBUF_ALLOC */
+         png_read_rows(read_ptr, (png_bytepp)&row_buf, png_bytepp_NULL, 1);
+
+#ifdef PNG_WRITE_SUPPORTED
 #ifdef PNGTEST_TIMING
          t_stop = (float)clock();
          t_decode += (t_stop - t_start);
@@ -1027,6 +1098,12 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
          t_encode += (t_stop - t_start);
          t_start = t_stop;
 #endif
+#endif /* PNG_WRITE_SUPPORTED */
+
+#ifndef SINGLE_ROWBUF_ALLOC
+         png_debug2(0, "Freeing row buffer (pass %d, y = %ld)\n\n", pass, y);
+         png_free(read_ptr, row_buf);
+#endif /* !SINGLE_ROWBUF_ALLOC */
       }
    }
 
@@ -1089,7 +1166,9 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       }
    }
 #endif
+#ifdef PNG_WRITE_SUPPORTED
    png_write_end(write_ptr, write_end_info_ptr);
+#endif
 
 #ifdef PNG_EASY_ACCESS_SUPPORTED
    if(verbose)
@@ -1103,11 +1182,20 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #endif
 
    png_debug(0, "Destroying data structs\n");
+#ifdef SINGLE_ROWBUF_ALLOC
+   png_debug(1, "destroying row_buf for read_ptr\n");
    png_free(read_ptr, row_buf);
    row_buf=NULL;
+#endif /* SINGLE_ROWBUF_ALLOC */
+   png_debug(1, "destroying read_ptr, read_info_ptr, end_info_ptr\n");
    png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
+#ifdef PNG_WRITE_SUPPORTED
+   png_debug(1, "destroying write_end_info_ptr\n");
    png_destroy_info_struct(write_ptr, &write_end_info_ptr);
+   png_debug(1, "destroying write_ptr, write_info_ptr\n");
    png_destroy_write_struct(&write_ptr, &write_info_ptr);
+#endif
+   png_debug(0, "Destruction complete.\n");
 
    FCLOSE(fpin);
    FCLOSE(fpout);
@@ -1218,8 +1306,8 @@ main(int argc, char *argv[])
    /* Show the version of libpng used in building the application */
    fprintf(STDERR," pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
       PNG_HEADER_VERSION_STRING);
-   fprintf(STDERR," sizeof(png_struct)=%d, sizeof(png_info)=%d\n",
-                    sizeof(png_struct), sizeof(png_info));
+   fprintf(STDERR," sizeof(png_struct)=%ld, sizeof(png_info)=%ld\n",
+                    (long)sizeof(png_struct), (long)sizeof(png_info));
 
    /* Do some consistency checking on the memory allocation settings, I'm
       not sure this matters, but it is nice to know, the first of these
@@ -1334,7 +1422,8 @@ main(int argc, char *argv[])
                current_allocation);
             while (pinfo != NULL)
             {
-               fprintf(STDERR, " %d bytes at %x\n", pinfo->size, pinfo->pointer);
+               fprintf(STDERR, " %lu bytes at %x\n", pinfo->size, 
+                 (unsigned int) pinfo->pointer);
                pinfo = pinfo->next;
             }
          }
@@ -1408,8 +1497,8 @@ main(int argc, char *argv[])
                 current_allocation);
              while (pinfo != NULL)
              {
-                fprintf(STDERR," %d bytes at %x\n",
-                   pinfo->size, pinfo->pointer);
+                fprintf(STDERR," %lu bytes at %x\n",
+                   pinfo->size, (unsigned int)pinfo->pointer);
                 pinfo = pinfo->next;
              }
           }
@@ -1449,4 +1538,4 @@ main(int argc, char *argv[])
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_9beta3 your_png_h_is_not_version_1_0_9beta3;
+typedef version_1_2_6beta1 your_png_h_is_not_version_1_2_6beta1;

pngtrans.c

@@ -1,9 +1,9 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  */
@@ -153,11 +153,14 @@ void /* PRIVATE */
 png_do_invert(png_row_infop row_info, png_bytep row)
 {
    png_debug(1, "in png_do_invert\n");
-   if (row_info->bit_depth == 1 &&
+  /* This test removed from libpng version 1.0.13 and 1.2.0:
+   *   if (row_info->bit_depth == 1 &&
+   */
 #if defined(PNG_USELESS_TESTS_SUPPORTED)
-       row != NULL && row_info != NULL &&
+   if (row == NULL || row_info == NULL)
+     return;
 #endif
-       row_info->color_type == PNG_COLOR_TYPE_GRAY)
+   if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
    {
       png_bytep rp = row;
       png_uint_32 i;
@@ -169,6 +172,33 @@ png_do_invert(png_row_infop row_info, png_bytep row)
          rp++;
       }
    }
+   else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
+      row_info->bit_depth == 8)
+   {
+      png_bytep rp = row;
+      png_uint_32 i;
+      png_uint_32 istop = row_info->rowbytes;
+
+      for (i = 0; i < istop; i+=2)
+      {
+         *rp = (png_byte)(~(*rp));
+         rp+=2;
+      }
+   }
+   else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
+      row_info->bit_depth == 16)
+   {
+      png_bytep rp = row;
+      png_uint_32 i;
+      png_uint_32 istop = row_info->rowbytes;
+
+      for (i = 0; i < istop; i+=4)
+      {
+         *rp = (png_byte)(~(*rp));
+         *(rp+1) = (png_byte)(~(*(rp+1)));
+         rp+=4;
+      }
+   }
 }
 #endif
 
@@ -392,11 +422,12 @@ png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
                sp += 8; dp += 6;
                for (i = 1; i < row_width; i++)
                {
-                  /* This could be (although memcpy is probably slower):
+                  /* This could be (although png_memcpy is probably slower):
                   png_memcpy(dp, sp, 6);
                   sp += 8;
                   dp += 6;
                   */
+
                   *dp++ = *sp++;
                   *dp++ = *sp++;
                   *dp++ = *sp++;
@@ -411,11 +442,12 @@ png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
                /* This converts from XXRRGGBB or AARRGGBB to RRGGBB */
                for (i = 0; i < row_width; i++)
                {
-                  /* This could be (although memcpy is probably slower):
+                  /* This could be (although png_memcpy is probably slower):
                   png_memcpy(dp, sp, 6);
                   sp += 8;
                   dp += 6;
                   */
+
                   sp+=2;
                   *dp++ = *sp++;
                   *dp++ = *sp++;

pngvcrd.c

@@ -2,16 +2,25 @@
  *
  * For Intel x86 CPU and Microsoft Visual C++ compiler
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng version 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * Copyright (c) 1998, Intel Corporation
  *
  * Contributed by Nirav Chhatrapati, Intel Corporation, 1998
  * Interface to libpng contributed by Gilles Vollant, 1999
  *
+ *
+ * In png_do_read_interlace() in libpng versions 1.0.3a through 1.0.4d,
+ * a sign error in the post-MMX cleanup code for each pixel_depth resulted
+ * in bad pixels at the beginning of some rows of some images, and also
+ * (due to out-of-range memory reads and writes) caused heap corruption
+ * when compiled with MSVC 6.0.  The error was fixed in version 1.0.4e.
+ *
  * [png_read_filter_row_mmx_avg() bpp == 2 bugfix, GRR 20000916]
  *
+ * [runtime MMX configuration, GRR 20010102]
+ *
  */
 
 #define PNG_INTERNAL
@@ -19,25 +28,18 @@
 
 #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGVCRD)
 
-/*
-   One of these might need to be defined.
-#define DISABLE_PNGVCRD_COMBINE
-#define DISABLE_PNGVCRD_INTERLACE
-*/
-
 static int mmx_supported=2;
 
-void /* PRIVATE */
-png_read_filter_row_c(png_structp png_ptr, png_row_infop row_info,
-   png_bytep row, png_bytep prev_row, int filter);
 
-static int mmxsupport()
+int PNGAPI
+png_mmx_support(void)
 {
   int mmx_supported_local = 0;
   _asm {
     push ebx          //CPUID will trash these
     push ecx
     push edx
+
     pushfd            //Save Eflag to stack
     pop eax           //Get Eflag from stack into eax
     mov ecx, eax      //Make another copy of Eflag in ecx
@@ -47,6 +49,8 @@ static int mmxsupport()
     popfd             //Restored modified value back to Eflag reg
     pushfd            //Save Eflag to stack
     pop eax           //Get Eflag from stack
+    push ecx          // save original Eflag to stack
+    popfd             // restore original Eflag
     xor eax, ecx      //Compare the new Eflag with the original Eflag
     jz NOT_SUPPORTED  //If the same, CPUID instruction is not supported,
                       //skip following instructions and jump to
@@ -83,6 +87,7 @@ NOT_SUPPORTED:
   //mmx_supported_local=0; // test code for force don't support MMX
   //printf("MMX : %u (1=MMX supported)\n",mmx_supported_local);
 
+  mmx_supported = mmx_supported_local;
   return mmx_supported_local;
 }
 
@@ -106,19 +111,14 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
 #ifdef PNG_USE_LOCAL_ARRAYS
    const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
 #endif
-#ifdef DISABLE_PNGVCRD_COMBINE
-   int save_mmx_supported = mmx_supported;
-#endif
 
    png_debug(1,"in png_combine_row_asm\n");
 
-#ifdef DISABLE_PNGVCRD_COMBINE
-   if ((png_ptr->transformations & PNG_INTERLACE) && png_ptr->pass != 6)
-       mmx_supported = 0;
-   else
-#endif
-       if (mmx_supported == 2)
-           mmx_supported = mmxsupport();
+   if (mmx_supported == 2) {
+       /* this should have happened in png_init_mmx_flags() already */
+       png_warning(png_ptr, "asm_flags may not have been initialized");
+       png_mmx_support();
+   }
 
    if (mask == 0xff)
    {
@@ -307,7 +307,8 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
 
             __int64 mask0=0x0102040810204080;
 
-            if (mmx_supported)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
+                /* && mmx_supported */ )
             {
                srcptr = png_ptr->row_buf + 1;
                dstptr = row;
@@ -407,7 +408,8 @@ end8:
             __int64 mask1=0x0101020204040808,
                     mask0=0x1010202040408080;
 
-            if (mmx_supported)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
+                /* && mmx_supported */ )
             {
                srcptr = png_ptr->row_buf + 1;
                dstptr = row;
@@ -527,7 +529,8 @@ end16:
             len     = (png_ptr->width)&~7;
             diff = (png_ptr->width)&7;
 
-            if (mmx_supported)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
+                /* && mmx_supported */ )
             {
                _asm
                {
@@ -658,7 +661,8 @@ end24:
             len     = (png_ptr->width)&~7;
             diff = (png_ptr->width)&7;
 
-            if (mmx_supported)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
+                /* && mmx_supported */ )
             {
                _asm
                {
@@ -792,7 +796,8 @@ end32:
                     mask1=0x2020202040404040,
                     mask0=0x4040808080808080;
 
-            if (mmx_supported)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
+                /* && mmx_supported */ )
             {
                srcptr = png_ptr->row_buf + 1;
                dstptr = row;
@@ -963,43 +968,29 @@ end48:
       } /* end switch (png_ptr->row_info.pixel_depth) */
    } /* end if (non-trivial mask) */
 
-#ifdef DISABLE_PNGVCRD_COMBINE
-   mmx_supported = save_mmx_supported;
-#endif
-
 } /* end png_combine_row() */
 
 
 #if defined(PNG_READ_INTERLACING_SUPPORTED)
 
 void /* PRIVATE */
-png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
-   png_uint_32 transformations)
+png_do_read_interlace(png_structp png_ptr)
 {
+   png_row_infop row_info = &(png_ptr->row_info);
+   png_bytep row = png_ptr->row_buf + 1;
+   int pass = png_ptr->pass;
+   png_uint_32 transformations = png_ptr->transformations;
 #ifdef PNG_USE_LOCAL_ARRAYS
    const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
 #endif
-#ifdef DISABLE_PNGVCRD_INTERLACE
-   int save_mmx_supported = mmx_supported;
-#endif
 
    png_debug(1,"in png_do_read_interlace\n");
 
-#ifdef DISABLE_PNGVCRD_INTERLACE
-   /* In libpng versions 1.0.3a through 1.0.4d,
-    * a sign error in the post-MMX cleanup code for each pixel_depth resulted
-    * in bad pixels at the beginning of some rows of some images, and also
-    * (due to out-of-range memory reads and writes) caused heap corruption
-    * when compiled with MSVC 6.0.  The error was fixed in version 1.0.4e,
-    * and the code appears to work completely correctly, so it is enabled
-    * by default.
-    */
-   if (1)  /* all passes caused a heap problem in the old code */
-      mmx_supported = 0;
-   else
-#endif
-       if (mmx_supported == 2)
-           mmx_supported = mmxsupport();
+   if (mmx_supported == 2) {
+       /* this should have happened in png_init_mmx_flags() already */
+       png_warning(png_ptr, "asm_flags may not have been initialized");
+       png_mmx_support();
+   }
 
    if (row != NULL && row_info != NULL)
    {
@@ -1197,7 +1188,9 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
             // sign fix by GRR
             // NOTE:  there is NO MMX code for 48-bit and 64-bit images
 
-            if (mmx_supported) // use MMX routine if machine supports it
+            // use MMX routine if machine supports it
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE)
+                /* && mmx_supported */ )
             {
                if (pixel_bytes == 3)
                {
@@ -1885,9 +1878,6 @@ loop4_pass4:
          (png_uint_32)row_info->pixel_depth + 7) >> 3);
    }
 
-#ifdef DISABLE_PNGVCRD_INTERLACE
-   mmx_supported = save_mmx_supported;
-#endif
 }
 
 #endif /* PNG_READ_INTERLACING_SUPPORTED */
@@ -3323,7 +3313,7 @@ dsub3lp:
       case 1:
       {
          // Placed here just in case this is a duplicate of the
-         // non-MMX code for the SUB filter in png_read_filter_row above
+         // non-MMX code for the SUB filter in png_read_filter_row below
          //
          //         png_bytep rp;
          //         png_bytep lp;
@@ -3658,61 +3648,56 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
    row, png_bytep prev_row, int filter)
 {
 #ifdef PNG_DEBUG
-   char filnm[6];
+   char filnm[10];
 #endif
-#define UseMMX 1
 
-   if (mmx_supported == 2)
-       mmx_supported = mmxsupport();
-
-   if (!mmx_supported)
-   {
-       png_read_filter_row_c(png_ptr, row_info, row, prev_row, filter);
-       return ;
+   if (mmx_supported == 2) {
+       /* this should have happened in png_init_mmx_flags() already */
+       png_warning(png_ptr, "asm_flags may not have been initialized");
+       png_mmx_support();
    }
 
 #ifdef PNG_DEBUG
    png_debug(1, "in png_read_filter_row\n");
-#  if (UseMMX == 1)
-   png_debug1(0,"%s, ", "MMX");
-#  else
-   png_debug1(0,"%s, ", "x86");
-#  endif
    switch (filter)
    {
-      case 0: sprintf(filnm, "None ");
+      case 0: sprintf(filnm, "none");
          break;
-      case 1: sprintf(filnm, "Sub  ");
+      case 1: sprintf(filnm, "sub-%s",
+        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" : "x86");
          break;
-      case 2: sprintf(filnm, "Up   ");
+      case 2: sprintf(filnm, "up-%s",
+        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" : "x86");
          break;
-      case 3: sprintf(filnm, "Avg  ");
+      case 3: sprintf(filnm, "avg-%s",
+        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" : "x86");
          break;
-      case 4: sprintf(filnm, "Paeth");
+      case 4: sprintf(filnm, "Paeth-%s",
+        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":"x86");
          break;
-      default: sprintf(filnm, "Unknw");
+      default: sprintf(filnm, "unknw");
          break;
    }
    png_debug2(0,"row=%5d, %s, ", png_ptr->row_number, filnm);
    png_debug2(0, "pd=%2d, b=%d, ", (int)row_info->pixel_depth,
       (int)((row_info->pixel_depth + 7) >> 3));
    png_debug1(0,"len=%8d, ", row_info->rowbytes);
-#endif
+#endif /* PNG_DEBUG */
 
    switch (filter)
    {
       case PNG_FILTER_VALUE_NONE:
          break;
+
       case PNG_FILTER_VALUE_SUB:
       {
-#if (UseMMX == 1)
-         if ((row_info->pixel_depth > 8) &&
-            (row_info->rowbytes >= 128) )
+         if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) &&
+             (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
+             (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
          {
             png_read_filter_row_mmx_sub(row_info, row);
          }
          else
-#endif
          {
             png_uint_32 i;
             png_uint_32 istop = row_info->rowbytes;
@@ -3725,41 +3710,43 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
                *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff);
                rp++;
             }
-         }  //end !UseMMX
+         }
          break;
       }
+
       case PNG_FILTER_VALUE_UP:
       {
-#if (UseMMX == 1)
-         if ((row_info->pixel_depth > 8) &&
-             (row_info->rowbytes >= 128) )
+         if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP) &&
+             (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
+             (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
          {
             png_read_filter_row_mmx_up(row_info, row, prev_row);
-         }  //end if UseMMX
+         }
          else
-#endif
          {
-            png_bytep rp;
-            png_bytep pp;
             png_uint_32 i;
-            for (i = 0, rp = row, pp = prev_row;
-               i < row_info->rowbytes; i++, rp++, pp++)
+            png_uint_32 istop = row_info->rowbytes;
+            png_bytep rp = row;
+            png_bytep pp = prev_row;
+
+            for (i = 0; i < istop; ++i)
             {
-                  *rp = (png_byte)(((int)(*rp) + (int)(*pp)) & 0xff);
+               *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
+               rp++;
             }
-         }  //end !UseMMX
+         }
          break;
       }
+
       case PNG_FILTER_VALUE_AVG:
       {
-#if (UseMMX == 1)
-         if ((row_info->pixel_depth > 8) &&
-             (row_info->rowbytes >= 128) )
+         if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) &&
+             (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
+             (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
          {
             png_read_filter_row_mmx_avg(row_info, row, prev_row);
-         }  //end if UseMMX
+         }
          else
-#endif
          {
             png_uint_32 i;
             png_bytep rp = row;
@@ -3781,19 +3768,19 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
                   ((int)(*pp++ + *lp++) >> 1)) & 0xff);
                rp++;
             }
-         }  //end !UseMMX
+         }
          break;
       }
+
       case PNG_FILTER_VALUE_PAETH:
       {
-#if (UseMMX == 1)
-         if ((row_info->pixel_depth > 8) &&
-             (row_info->rowbytes >= 128) )
+         if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) &&
+             (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
+             (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
          {
             png_read_filter_row_mmx_paeth(row_info, row, prev_row);
-         }  //end if UseMMX
+         }
          else
-#endif
          {
             png_uint_32 i;
             png_bytep rp = row;
@@ -3844,13 +3831,15 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
                *rp = (png_byte)(((int)(*rp) + p) & 0xff);
                rp++;
             }
-         }  //end !UseMMX
+         }
          break;
       }
+
       default:
-         png_warning(png_ptr, "Ignoring bad adaptive filter type");
+         png_warning(png_ptr, "Ignoring bad row filter type");
          *row=0;
          break;
    }
 }
-#endif
+
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED && PNG_USE_PNGVCRD */

pngwio.c

@@ -1,9 +1,9 @@
 
 /* pngwio.c - functions for data output
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -17,6 +17,7 @@
 
 #define PNG_INTERNAL
 #include "png.h"
+#ifdef PNG_WRITE_SUPPORTED
 
 /* Write the data to whatever output you are using.  The default routine
    writes to a file pointer.  Note that this routine sometimes gets called
@@ -39,7 +40,7 @@ png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
    write_data function and use it at run time with png_set_write_fn(), rather
    than changing the library. */
 #ifndef USE_FAR_KEYWORD
-static void /* PRIVATE */
+void PNGAPI
 png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    png_uint_32 check;
@@ -62,7 +63,7 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
 #define NEAR_BUF_SIZE 1024
 #define MIN(a,b) (a <= b ? a : b)
 
-static void /* PRIVATE */
+void PNGAPI
 png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
 {
    png_uint_32 check;
@@ -125,7 +126,7 @@ png_flush(png_structp png_ptr)
 }
 
 #if !defined(PNG_NO_STDIO)
-static void /* PRIVATE */
+void PNGAPI
 png_default_flush(png_structp png_ptr)
 {
 #if !defined(_WIN32_WCE)
@@ -224,3 +225,4 @@ void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
 }
 #   endif
 #   endif
+#endif /* PNG_WRITE_SUPPORTED */

pngwrite.c

@@ -1,9 +1,9 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  */
@@ -11,6 +11,7 @@
 /* get internal access to png.h */
 #define PNG_INTERNAL
 #include "png.h"
+#ifdef PNG_WRITE_SUPPORTED
 
 /* Writes all the PNG information.  This is the suggested way to use the
  * library.  If you have a new chunk to add, make a function to write it,
@@ -28,6 +29,13 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
    if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
    {
    png_write_sig(png_ptr); /* write PNG signature */
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
+   if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted))
+   {
+      png_warning(png_ptr,"MNG features are not allowed in a PNG datastream\n");
+      png_ptr->mng_features_permitted=0;
+   }
+#endif
    /* write IHDR information. */
    png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
       info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
@@ -57,7 +65,7 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
 #endif
 #if defined(PNG_WRITE_iCCP_SUPPORTED)
    if (info_ptr->valid & PNG_INFO_iCCP)
-      png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_TEXT_COMPRESSION_zTXt,
+      png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
                      info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
 #endif
 #if defined(PNG_WRITE_sBIT_SUPPORTED)
@@ -416,7 +424,7 @@ png_create_write_struct(png_const_charp user_png_ver, png_voidp error_ptr,
 {
 #ifdef PNG_USER_MEM_SUPPORTED
    return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn,
-      warn_fn, NULL, NULL, NULL));
+      warn_fn, png_voidp_NULL, png_malloc_ptr_NULL, png_free_ptr_NULL));
 }
 
 /* Alternate initialize png_ptr structure, and allocate any memory needed */
@@ -435,14 +443,19 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
    int i;
    png_debug(1, "in png_create_write_struct\n");
 #ifdef PNG_USER_MEM_SUPPORTED
-   if ((png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
-      (png_malloc_ptr)malloc_fn)) == NULL)
+   png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
+      (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
 #else
-   if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL)
+   png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
 #endif /* PNG_USER_MEM_SUPPORTED */
-   {
-      return ((png_structp)NULL);
-   }
+   if (png_ptr == NULL)
+      return (NULL);
+
+#if !defined(PNG_1_0_X)
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */
+#endif
+#endif /* PNG_1_0_X */
 
 #ifdef PNG_SETJMP_SUPPORTED
 #ifdef USE_FAR_KEYWORD
@@ -454,7 +467,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
       png_free(png_ptr, png_ptr->zbuf);
       png_ptr->zbuf=NULL;
       png_destroy_struct(png_ptr);
-      return ((png_structp)NULL);
+      return (NULL);
    }
 #ifdef USE_FAR_KEYWORD
    png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
@@ -481,23 +494,27 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
       * only check the first digit.
       */
      if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
+         (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
          (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
      {
+#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
+        char msg[80];
+        if (user_png_ver)
+        {
+          sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
+             user_png_ver);
+          png_warning(png_ptr, msg);
+        }
+        sprintf(msg, "Application  is  running with png.c from libpng-%.20s",
+           png_libpng_ver);
+        png_warning(png_ptr, msg);
+#endif
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+        png_ptr->flags=0;
+#endif
         png_error(png_ptr,
            "Incompatible libpng version in application and library");
      }
-
-     /* Libpng 1.0.6 was not binary compatible, due to insertion of the
-        info_ptr->free_me member.  Note to maintainer: this test can be
-        removed from version 2.0.0 and beyond because the previous test
-        would have already rejected it. */
-
-     if (user_png_ver[4] == '6' && user_png_ver[2] == '0' &&
-         user_png_ver[0] == '1' && user_png_ver[5] == '\0')
-     {
-        png_error(png_ptr,
-           "Application must be recompiled; version 1.0.6 was incompatible");
-     }
    }
 
    /* initialize zbuf - compression buffer */
@@ -505,14 +522,28 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
    png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
       (png_uint_32)png_ptr->zbuf_size);
 
-   png_set_write_fn(png_ptr, NULL, NULL, NULL);
+   png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
+      png_flush_ptr_NULL);
 
 #if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
    png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
-      1, NULL, NULL);
+      1, png_doublep_NULL, png_doublep_NULL);
 #endif
 
-   return ((png_structp)png_ptr);
+#ifdef PNG_SETJMP_SUPPORTED
+/* Applications that neglect to set up their own setjmp() and then encounter
+   a png_error() will longjmp here.  Since the jmpbuf is then meaningless we
+   abort instead of returning. */
+#ifdef USE_FAR_KEYWORD
+   if (setjmp(jmpbuf))
+      PNG_ABORT();
+   png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
+#else
+   if (setjmp(png_ptr->jmpbuf))
+      PNG_ABORT();
+#endif
+#endif
+   return (png_ptr);
 }
 
 /* Initialize png_ptr structure, and allocate any memory needed */
@@ -521,13 +552,57 @@ void PNGAPI
 png_write_init(png_structp png_ptr)
 {
    /* We only come here via pre-1.0.7-compiled applications */
-   png_write_init_2(png_ptr, "1.0.0", 10000, 10000);
+   png_write_init_2(png_ptr, "1.0.6 or earlier", 0, 0);
 }
 
 void PNGAPI
 png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
    png_size_t png_struct_size, png_size_t png_info_size)
 {
+   /* We only come here via pre-1.0.12-compiled applications */
+#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
+   if(sizeof(png_struct) > png_struct_size || sizeof(png_info) > png_info_size)
+   {
+      char msg[80];
+      png_ptr->warning_fn=NULL;
+      if (user_png_ver)
+      {
+        sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
+           user_png_ver);
+        png_warning(png_ptr, msg);
+      }
+      sprintf(msg, "Application  is  running with png.c from libpng-%.20s",
+         png_libpng_ver);
+      png_warning(png_ptr, msg);
+   }
+#endif
+   if(sizeof(png_struct) > png_struct_size)
+     {
+       png_ptr->error_fn=NULL;
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+       png_ptr->flags=0;
+#endif
+       png_error(png_ptr,
+       "The png struct allocated by the application for writing is too small.");
+     }
+   if(sizeof(png_info) > png_info_size)
+     {
+       png_ptr->error_fn=NULL;
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+       png_ptr->flags=0;
+#endif
+       png_error(png_ptr,
+       "The info struct allocated by the application for writing is too small.");
+     }
+   png_write_init_3(&png_ptr, user_png_ver, png_struct_size);
+}
+
+
+void PNGAPI
+png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
+   png_size_t png_struct_size)
+{
+   png_structp png_ptr=*ptr_ptr;
 #ifdef PNG_SETJMP_SUPPORTED
    jmp_buf tmp_jmp; /* to save current jump buffer */
 #endif
@@ -539,45 +614,53 @@ png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver,
 #ifdef PNG_LEGACY_SUPPORTED
        png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
 #else
-       png_ptr->error_fn=(png_error_ptr)NULL;
-       png_error(png_ptr,
-       "Application uses deprecated png_write_init() and must be recompiled.");
+       png_ptr->warning_fn=NULL;
+       png_warning(png_ptr,
+     "Application uses deprecated png_write_init() and should be recompiled.");
+       break;
 #endif
      }
    } while (png_libpng_ver[i++]);
 
-   if (sizeof(png_struct) > png_struct_size ||
-      sizeof(png_info) > png_info_size)
-     {
-       png_ptr->error_fn=(png_error_ptr)NULL;
-       png_error(png_ptr,
-      "Application and library have different sized structs. Please recompile.");
-     }
-
-   png_debug(1, "in png_write_init_2\n");
+   png_debug(1, "in png_write_init_3\n");
 
 #ifdef PNG_SETJMP_SUPPORTED
    /* save jump buffer and error functions */
    png_memcpy(tmp_jmp, png_ptr->jmpbuf, sizeof (jmp_buf));
 #endif
 
+   if (sizeof(png_struct) > png_struct_size)
+     {
+       png_destroy_struct(png_ptr);
+       png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
+       *ptr_ptr = png_ptr;
+     }
+
    /* reset all variables to 0 */
    png_memset(png_ptr, 0, sizeof (png_struct));
 
+#if !defined(PNG_1_0_X)
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */
+#endif
+#endif /* PNG_1_0_X */
+
 #ifdef PNG_SETJMP_SUPPORTED
    /* restore jump buffer */
    png_memcpy(png_ptr->jmpbuf, tmp_jmp, sizeof (jmp_buf));
 #endif
 
+   png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL,
+      png_flush_ptr_NULL);
+
    /* initialize zbuf - compression buffer */
    png_ptr->zbuf_size = PNG_ZBUF_SIZE;
    png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
       (png_uint_32)png_ptr->zbuf_size);
-   png_set_write_fn(png_ptr, NULL, NULL, NULL);
 
 #if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
    png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
-      1, NULL, NULL);
+      1, png_doublep_NULL, png_doublep_NULL);
 #endif
 }
 
@@ -639,6 +722,11 @@ png_write_row(png_structp png_ptr, png_bytep row)
    /* initialize transformations and other stuff if first time */
    if (png_ptr->row_number == 0 && png_ptr->pass == 0)
    {
+   /* make sure we wrote the header info */
+   if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
+      png_error(png_ptr,
+         "png_write_info was never called before png_write_row.");
+
    /* check for transforms that have been set but were defined out */
 #if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED)
    if (png_ptr->transformations & PNG_INVERT_MONO)
@@ -773,6 +861,24 @@ png_write_row(png_structp png_ptr, png_bytep row)
    if (png_ptr->transformations)
       png_do_write_transformations(png_ptr);
 
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
+   /* Write filter_method 64 (intrapixel differencing) only if
+    * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
+    * 2. Libpng did not write a PNG signature (this filter_method is only
+    *    used in PNG datastreams that are embedded in MNG datastreams) and
+    * 3. The application called png_permit_mng_features with a mask that
+    *    included PNG_FLAG_MNG_FILTER_64 and
+    * 4. The filter_method is 64 and
+    * 5. The color_type is RGB or RGBA
+    */
+   if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+      (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
+   {
+      /* Intrapixel differencing */
+      png_do_write_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
+   }
+#endif
+
    /* Find a filter if necessary, filter the row and write it out. */
    png_write_find_filter(png_ptr, &(png_ptr->row_info));
 
@@ -850,6 +956,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
    png_infop info_ptr = NULL;
 #ifdef PNG_USER_MEM_SUPPORTED
    png_free_ptr free_fn = NULL;
+   png_voidp mem_ptr = NULL;
 #endif
 
    png_debug(1, "in png_destroy_write_struct\n");
@@ -858,6 +965,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
       png_ptr = *png_ptr_ptr;
 #ifdef PNG_USER_MEM_SUPPORTED
       free_fn = png_ptr->free_fn;
+      mem_ptr = png_ptr->mem_ptr;
 #endif
    }
 
@@ -878,28 +986,30 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
 #endif
 
 #ifdef PNG_USER_MEM_SUPPORTED
-      png_destroy_struct_2((png_voidp)info_ptr, free_fn);
+      png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
+         (png_voidp)mem_ptr);
 #else
       png_destroy_struct((png_voidp)info_ptr);
 #endif
-      *info_ptr_ptr = (png_infop)NULL;
+      *info_ptr_ptr = NULL;
    }
 
    if (png_ptr != NULL)
    {
       png_write_destroy(png_ptr);
 #ifdef PNG_USER_MEM_SUPPORTED
-      png_destroy_struct_2((png_voidp)png_ptr, free_fn);
+      png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
+         (png_voidp)mem_ptr);
 #else
       png_destroy_struct((png_voidp)png_ptr);
 #endif
-      *png_ptr_ptr = (png_structp)NULL;
+      *png_ptr_ptr = NULL;
    }
 }
 
 
 /* Free any memory used in png_ptr struct (old method) */
-void PNGAPI
+void /* PRIVATE */
 png_write_destroy(png_structp png_ptr)
 {
 #ifdef PNG_SETJMP_SUPPORTED
@@ -968,6 +1078,11 @@ void PNGAPI
 png_set_filter(png_structp png_ptr, int method, int filters)
 {
    png_debug(1, "in png_set_filter\n");
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
+   if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+      (method == PNG_INTRAPIXEL_DIFFERENCING))
+         method = PNG_FILTER_TYPE_BASE;
+#endif
    if (method == PNG_FILTER_TYPE_BASE)
    {
       switch (filters & (PNG_ALL_FILTERS | 0x07))
@@ -1107,12 +1222,11 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
 
       if (png_ptr->filter_weights == NULL)
       {
-         png_ptr->filter_weights = (png_uint_16p) png_malloc(png_ptr,
+         png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr,
             (png_uint_32)(sizeof(png_uint_16) * num_weights));
 
-         png_ptr->inv_filter_weights = (png_uint_16p) png_malloc(png_ptr,
+         png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
             (png_uint_32)(sizeof(png_uint_16) * num_weights));
-
          for (i = 0; i < num_weights; i++)
          {
             png_ptr->inv_filter_weights[i] =
@@ -1142,10 +1256,10 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
     */
    if (png_ptr->filter_costs == NULL)
    {
-      png_ptr->filter_costs = (png_uint_16p) png_malloc(png_ptr,
+      png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
          (png_uint_32)(sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
 
-      png_ptr->inv_filter_costs = (png_uint_16p) png_malloc(png_ptr,
+      png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
          (png_uint_32)(sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
 
       for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
@@ -1329,7 +1443,8 @@ png_write_png(png_structp png_ptr, png_infop info_ptr,
    /* It is REQUIRED to call this to finish writing the rest of the file */
    png_write_end(png_ptr, info_ptr);
 
-   if(transforms == 0 || params == (voidp)NULL)
+   if(transforms == 0 || params == NULL)
       /* quiet compiler warnings */ return;
 }
 #endif
+#endif /* PNG_WRITE_SUPPORTED */

pngwtran.c

@@ -1,15 +1,16 @@
 
 /* pngwtran.c - transforms the data in a row for PNG writers
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  */
 
 #define PNG_INTERNAL
 #include "png.h"
+#ifdef PNG_WRITE_SUPPORTED
 
 /* Transform the data according to the user's wishes.  The order of
  * transformations is significant.
@@ -498,3 +499,65 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
    }
 }
 #endif
+
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
+/* undoes intrapixel differencing  */
+void /* PRIVATE */
+png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
+{
+   png_debug(1, "in png_do_write_intrapixel\n");
+   if (
+#if defined(PNG_USELESS_TESTS_SUPPORTED)
+       row != NULL && row_info != NULL &&
+#endif
+       (row_info->color_type & PNG_COLOR_MASK_COLOR))
+   {
+      int bytes_per_pixel;
+      png_uint_32 row_width = row_info->width;
+      if (row_info->bit_depth == 8)
+      {
+         png_bytep rp;
+         png_uint_32 i;
+
+         if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+            bytes_per_pixel = 3;
+         else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+            bytes_per_pixel = 4;
+         else
+            return;
+
+         for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
+         {
+            *(rp)   = (png_byte)((*rp     - *(rp+1))&0xff);
+            *(rp+2) = (png_byte)((*(rp+2) - *(rp+1))&0xff);
+         }
+      }
+      else if (row_info->bit_depth == 16)
+      {
+         png_bytep rp;
+         png_uint_32 i;
+
+         if (row_info->color_type == PNG_COLOR_TYPE_RGB)
+            bytes_per_pixel = 6;
+         else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+            bytes_per_pixel = 8;
+         else
+            return;
+
+         for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
+         {
+            png_uint_32 s0=*(rp  )<<8 | *(rp+1);
+            png_uint_32 s1=*(rp+2)<<8 | *(rp+3);
+            png_uint_32 s2=*(rp+4)<<8 | *(rp+5);
+            png_uint_32 red=(s0-s1)&0xffff;
+            png_uint_32 blue=(s2-s1)&0xffff;
+            *(rp  ) = (png_byte)((red>>8)&0xff);
+            *(rp+1) = (png_byte)(red&0xff);
+            *(rp+4) = (png_byte)((blue>>8)&0xff);
+            *(rp+5) = (png_byte)(blue&0xff);
+         }
+      }
+   }
+}
+#endif /* PNG_MNG_FEATURES_SUPPORTED */
+#endif /* PNG_WRITE_SUPPORTED */

pngwutil.c

@@ -1,15 +1,16 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * libpng 1.0.9beta3 - November 23, 2000
+ * libpng 1.2.6beta1 - October 22, 2002
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  */
 
 #define PNG_INTERNAL
 #include "png.h"
+#ifdef PNG_WRITE_SUPPORTED
 
 /* Place a 32-bit number into a buffer in PNG byte order.  We work
  * with unsigned numbers for convenience, although one supported
@@ -24,7 +25,7 @@ png_save_uint_32(png_bytep buf, png_uint_32 i)
    buf[3] = (png_byte)(i & 0xff);
 }
 
-#if defined(PNG_WRITE_pCAL_SUPPORTED)
+#if defined(PNG_WRITE_pCAL_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED)
 /* The png_save_int_32 function assumes integers are stored in two's
  * complement format.  If this isn't the case, then this routine needs to
  * be modified to write data in two's complement format.
@@ -131,6 +132,8 @@ png_write_sig(png_structp png_ptr)
    /* write the rest of the 8 byte signature */
    png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
       (png_size_t)8 - png_ptr->sig_bytes);
+   if(png_ptr->sig_bytes < 3)
+      png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
 }
 
 #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_iCCP_SUPPORTED)
@@ -232,8 +235,8 @@ png_text_compress(png_structp png_ptr,
                old_ptr = comp->output_ptr;
                comp->output_ptr = (png_charpp)png_malloc(png_ptr,
                   (png_uint_32)(comp->max_output_ptr * sizeof (png_charpp)));
-               png_memcpy(comp->output_ptr, old_ptr,
-           old_max * sizeof (png_charp));
+               png_memcpy(comp->output_ptr, old_ptr, old_max
+                  * sizeof (png_charp));
                png_free(png_ptr, old_ptr);
             }
             else
@@ -282,7 +285,7 @@ png_text_compress(png_structp png_ptr,
                   comp->output_ptr = (png_charpp)png_malloc(png_ptr,
                      (png_uint_32)(comp->max_output_ptr * sizeof (png_charpp)));
                   png_memcpy(comp->output_ptr, old_ptr,
-              old_max * sizeof (png_charp));
+                     old_max * sizeof (png_charp));
                   png_free(png_ptr, old_ptr);
                }
                else
@@ -329,7 +332,8 @@ png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
    /* handle the no-compression case */
    if (comp->input)
    {
-       png_write_chunk_data(png_ptr, (png_bytep)comp->input, comp->input_len);
+       png_write_chunk_data(png_ptr, (png_bytep)comp->input,
+                            (png_size_t)comp->input_len);
        return;
    }
 
@@ -419,7 +423,24 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
       compression_type = PNG_COMPRESSION_TYPE_BASE;
    }
 
-   if (filter_type != PNG_FILTER_TYPE_BASE)
+   /* Write filter_method 64 (intrapixel differencing) only if
+    * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
+    * 2. Libpng did not write a PNG signature (this filter_method is only
+    *    used in PNG datastreams that are embedded in MNG datastreams) and
+    * 3. The application called png_permit_mng_features with a mask that
+    *    included PNG_FLAG_MNG_FILTER_64 and
+    * 4. The filter_method is 64 and
+    * 5. The color_type is RGB or RGBA
+    */
+   if (
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
+      !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+      ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
+      (color_type == PNG_COLOR_TYPE_RGB ||
+       color_type == PNG_COLOR_TYPE_RGB_ALPHA) &&
+      (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) &&
+#endif
+      filter_type != PNG_FILTER_TYPE_BASE)
    {
       png_warning(png_ptr, "Invalid filter type specified");
       filter_type = PNG_FILTER_TYPE_BASE;
@@ -440,6 +461,9 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
    png_ptr->bit_depth = (png_byte)bit_depth;
    png_ptr->color_type = (png_byte)color_type;
    png_ptr->interlaced = (png_byte)interlace_type;
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
+   png_ptr->filter_type = (png_byte)filter_type;
+#endif
    png_ptr->width = width;
    png_ptr->height = height;
 
@@ -518,16 +542,23 @@ png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)
         !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
 #endif
         num_pal == 0) || num_pal > 256)
+   {
+     if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
      {
-       if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
-         {
-           png_error(png_ptr, "Invalid number of colors in palette");
-         }
-       else
-         {
-           png_warning(png_ptr, "Invalid number of colors in palette");
-           return;
-         }
+        png_error(png_ptr, "Invalid number of colors in palette");
+     }
+     else
+     {
+        png_warning(png_ptr, "Invalid number of colors in palette");
+        return;
+     }
+   }
+
+   if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
+   {
+      png_warning(png_ptr,
+        "Ignoring request to write a PLTE chunk in grayscale PNG");
+      return;
    }
 
    png_ptr->num_palette = (png_uint_16)num_pal;
@@ -577,7 +608,8 @@ png_write_IEND(png_structp png_ptr)
    PNG_IEND;
 #endif
    png_debug(1, "in png_write_IEND\n");
-   png_write_chunk(png_ptr, (png_bytep)png_IEND, NULL, (png_size_t)0);
+   png_write_chunk(png_ptr, (png_bytep)png_IEND, png_bytep_NULL,
+     (png_size_t)0);
    png_ptr->mode |= PNG_HAVE_IEND;
 }
 
@@ -611,7 +643,7 @@ png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
 
    png_debug(1, "in png_write_gAMA\n");
    /* file_gamma is saved in 1/100,000ths */
-   png_save_uint_32(buf, file_gamma);
+   png_save_uint_32(buf, (png_uint_32)file_gamma);
    png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
 }
 #endif
@@ -657,7 +689,7 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
       return;
    }
 
-   if (compression_type)
+   if (compression_type != PNG_COMPRESSION_TYPE_BASE)
       png_warning(png_ptr, "Unknown compression type in iCCP chunk");
 
    if (profile == NULL)
@@ -665,7 +697,7 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
 
    if (profile_len)
        profile_len = png_text_compress(png_ptr, profile, (png_size_t)profile_len,
-          PNG_TEXT_COMPRESSION_zTXt, &comp);
+          PNG_COMPRESSION_TYPE_BASE, &comp);
 
    /* make sure we include the NULL after the name and the compression type */
    png_write_chunk_start(png_ptr, (png_bytep)png_iCCP,
@@ -708,7 +740,7 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
    }
 
    /* make sure we include the NULL after the name */
-   png_write_chunk_start(png_ptr, (png_bytep) png_sPLT,
+   png_write_chunk_start(png_ptr, (png_bytep)png_sPLT,
           (png_uint_32)(name_len + 2 + palette_size));
    png_write_chunk_data(png_ptr, (png_bytep)new_name, name_len + 1);
    png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, 1);
@@ -733,7 +765,7 @@ png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
            png_save_uint_16(entrybuf + 6, ep->alpha);
            png_save_uint_16(entrybuf + 8, ep->frequency);
        }
-       png_write_chunk_data(png_ptr, entrybuf, entry_size);
+       png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
    }
 #else
    ep=spalette->entries;
@@ -908,32 +940,32 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
 #endif
       return;
    }
-   png_save_uint_32(buf, white_x);
-   png_save_uint_32(buf + 4, white_y);
+   png_save_uint_32(buf, (png_uint_32)white_x);
+   png_save_uint_32(buf + 4, (png_uint_32)white_y);
 
    if (red_x > 80000L || red_y > 80000L || red_x + red_y > 100000L)
    {
       png_warning(png_ptr, "Invalid cHRM fixed red point specified");
       return;
    }
-   png_save_uint_32(buf + 8, red_x);
-   png_save_uint_32(buf + 12, red_y);
+   png_save_uint_32(buf + 8, (png_uint_32)red_x);
+   png_save_uint_32(buf + 12, (png_uint_32)red_y);
 
    if (green_x > 80000L || green_y > 80000L || green_x + green_y > 100000L)
    {
       png_warning(png_ptr, "Invalid fixed cHRM green point specified");
       return;
    }
-   png_save_uint_32(buf + 16, green_x);
-   png_save_uint_32(buf + 20, green_y);
+   png_save_uint_32(buf + 16, (png_uint_32)green_x);
+   png_save_uint_32(buf + 20, (png_uint_32)green_y);
 
    if (blue_x > 80000L || blue_y > 80000L || blue_x + blue_y > 100000L)
    {
       png_warning(png_ptr, "Invalid fixed cHRM blue point specified");
       return;
    }
-   png_save_uint_32(buf + 24, blue_x);
-   png_save_uint_32(buf + 28, blue_y);
+   png_save_uint_32(buf + 24, (png_uint_32)blue_x);
+   png_save_uint_32(buf + 28, (png_uint_32)blue_y);
 
    png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
 }
@@ -965,6 +997,12 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
    else if (color_type == PNG_COLOR_TYPE_GRAY)
    {
       /* one 16 bit value */
+      if(tran->gray >= (1 << png_ptr->bit_depth))
+      {
+         png_warning(png_ptr,
+           "Ignoring attempt to write tRNS chunk out-of-range for bit_depth");
+         return;
+      }
       png_save_uint_16(buf, tran->gray);
       png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)2);
    }
@@ -974,6 +1012,12 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
       png_save_uint_16(buf, tran->red);
       png_save_uint_16(buf + 2, tran->green);
       png_save_uint_16(buf + 4, tran->blue);
+      if(png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
+         {
+            png_warning(png_ptr,
+              "Ignoring attempt to write 16-bit tRNS chunk when bit_depth is 8");
+            return;
+         }
       png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)6);
    }
    else
@@ -1014,10 +1058,22 @@ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
       png_save_uint_16(buf, back->red);
       png_save_uint_16(buf + 2, back->green);
       png_save_uint_16(buf + 4, back->blue);
+      if(png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
+         {
+            png_warning(png_ptr,
+              "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8");
+            return;
+         }
       png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)6);
    }
    else
    {
+      if(back->gray >= (1 << png_ptr->bit_depth))
+      {
+         png_warning(png_ptr,
+           "Ignoring attempt to write bKGD chunk out-of-range for bit_depth");
+         return;
+      }
       png_save_uint_16(buf, back->gray);
       png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)2);
    }
@@ -1072,13 +1128,14 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
    png_size_t key_len;
    png_charp kp, dp;
    int kflag;
+   int kwarn=0;
 
    png_debug(1, "in png_check_keyword\n");
    *new_key = NULL;
 
    if (key == NULL || (key_len = png_strlen(key)) == 0)
    {
-      png_chunk_warning(png_ptr, "zero length keyword");
+      png_warning(png_ptr, "zero length keyword");
       return ((png_size_t)0);
    }
 
@@ -1095,9 +1152,9 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
          char msg[40];
 
          sprintf(msg, "invalid keyword character 0x%02X", *kp);
-         png_chunk_warning(png_ptr, msg);
+         png_warning(png_ptr, msg);
 #else
-         png_chunk_warning(png_ptr, "invalid character in keyword");
+         png_warning(png_ptr, "invalid character in keyword");
 #endif
          *dp = ' ';
       }
@@ -1112,7 +1169,7 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
    kp = *new_key + key_len - 1;
    if (*kp == ' ')
    {
-      png_chunk_warning(png_ptr, "trailing spaces removed from keyword");
+      png_warning(png_ptr, "trailing spaces removed from keyword");
 
       while (*kp == ' ')
       {
@@ -1125,7 +1182,7 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
    kp = *new_key;
    if (*kp == ' ')
    {
-      png_chunk_warning(png_ptr, "leading spaces removed from keyword");
+      png_warning(png_ptr, "leading spaces removed from keyword");
 
       while (*kp == ' ')
       {
@@ -1147,6 +1204,7 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
       else if (*kp == ' ')
       {
          key_len--;
+         kwarn=1;
       }
       else
       {
@@ -1155,17 +1213,19 @@ png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
       }
    }
    *dp = '\0';
+   if(kwarn)
+      png_warning(png_ptr, "extra interior spaces removed from keyword");
 
    if (key_len == 0)
    {
       png_free(png_ptr, *new_key);
       *new_key=NULL;
-      png_chunk_warning(png_ptr, "Zero length keyword");
+      png_warning(png_ptr, "Zero length keyword");
    }
 
    if (key_len > 79)
    {
-      png_chunk_warning(png_ptr, "keyword length must be 1 - 79 characters");
+      png_warning(png_ptr, "keyword length must be 1 - 79 characters");
       new_key[79] = '\0';
       key_len = 79;
    }
@@ -1289,22 +1349,28 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
       png_warning(png_ptr, "Empty keyword in iTXt chunk");
       return;
    }
-   if (lang == NULL || (lang_len = png_check_keyword(png_ptr, lang,
-      &new_lang))==0)
+   if (lang == NULL || (lang_len = png_check_keyword(png_ptr, lang, &new_lang))==0)
    {
       png_warning(png_ptr, "Empty language field in iTXt chunk");
-      return;
+      new_lang = NULL;
+      lang_len = 0;      
    }
-   lang_key_len = png_strlen(lang_key);
-   text_len = png_strlen(text);
 
-   if (text == NULL || *text == '\0')
+   if (lang_key == NULL)
+     lang_key_len = 0;
+   else
+     lang_key_len = png_strlen(lang_key);
+
+   if (text == NULL)
       text_len = 0;
+   else
+     text_len = png_strlen(text);
 
    /* compute the compressed data; do it now for the length */
    text_len = png_text_compress(png_ptr, text, text_len, compression-2,
       &comp);
 
+
    /* make sure we include the compression flag, the compression byte,
     * and the NULs after the key, lang, and lang_key parts */
 
@@ -1334,23 +1400,22 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
    cbuf[1] = 0;
    png_write_chunk_data(png_ptr, cbuf, 2);
 
-   png_write_chunk_data(png_ptr, (png_bytep)new_lang, lang_len + 1);
-   png_write_chunk_data(png_ptr, (png_bytep)lang_key, lang_key_len+1);
-   png_write_chunk_data(png_ptr, '\0', 1);
-
+   cbuf[0] = 0;
+   png_write_chunk_data(png_ptr, (new_lang ? (png_bytep)new_lang : cbuf), lang_len + 1);
+   png_write_chunk_data(png_ptr, (lang_key ? (png_bytep)lang_key : cbuf), lang_key_len + 1);
    png_write_compressed_data_out(png_ptr, &comp);
 
    png_write_chunk_end(png_ptr);
    png_free(png_ptr, new_key);
-   png_free(png_ptr, new_lang);
+   if (new_lang)
+     png_free(png_ptr, new_lang);
 }
 #endif
 
 #if defined(PNG_WRITE_oFFs_SUPPORTED)
 /* write the oFFs chunk */
 void /* PRIVATE */
-png_write_oFFs(png_structp png_ptr, png_uint_32 x_offset,
-   png_uint_32 y_offset,
+png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
    int unit_type)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
@@ -1362,8 +1427,8 @@ png_write_oFFs(png_structp png_ptr, png_uint_32 x_offset,
    if (unit_type >= PNG_OFFSET_LAST)
       png_warning(png_ptr, "Unrecognized unit type for oFFs chunk");
 
-   png_save_uint_32(buf, x_offset);
-   png_save_uint_32(buf + 4, y_offset);
+   png_save_int_32(buf, x_offset);
+   png_save_int_32(buf + 4, y_offset);
    buf[8] = (png_byte)unit_type;
 
    png_write_chunk(png_ptr, (png_bytep)png_oFFs, buf, (png_size_t)9);
@@ -1390,9 +1455,9 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
       png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
 
    purpose_len = png_check_keyword(png_ptr, purpose, &new_purpose) + 1;
-   png_debug1(3, "pCAL purpose length = %d\n", purpose_len);
+   png_debug1(3, "pCAL purpose length = %d\n", (int)purpose_len);
    units_len = png_strlen(units) + (nparams == 0 ? 0 : 1);
-   png_debug1(3, "pCAL units length = %d\n", units_len);
+   png_debug1(3, "pCAL units length = %d\n", (int)units_len);
    total_len = purpose_len + units_len + 10;
 
    params_len = (png_uint_32p)png_malloc(png_ptr, (png_uint_32)(nparams
@@ -1407,7 +1472,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
       total_len += (png_size_t)params_len[i];
    }
 
-   png_debug1(3, "pCAL total length = %d\n", total_len);
+   png_debug1(3, "pCAL total length = %d\n", (int)total_len);
    png_write_chunk_start(png_ptr, (png_bytep)png_pCAL, (png_uint_32)total_len);
    png_write_chunk_data(png_ptr, (png_bytep)new_purpose, purpose_len);
    png_save_int_32(buf, X0);
@@ -1459,11 +1524,11 @@ png_write_sCAL(png_structp png_ptr, int unit, double width,double height)
 #endif
    total_len = 1 + png_strlen(wbuf)+1 + png_strlen(hbuf);
 
-   png_debug1(3, "sCAL total length = %d\n", total_len);
+   png_debug1(3, "sCAL total length = %d\n", (int)total_len);
    png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len);
    png_write_chunk_data(png_ptr, (png_bytep)&unit, 1);
-   png_write_chunk_data(png_ptr, (png_bytep)wbuf, strlen(wbuf)+1);
-   png_write_chunk_data(png_ptr, (png_bytep)hbuf, strlen(hbuf));
+   png_write_chunk_data(png_ptr, (png_bytep)wbuf, png_strlen(wbuf)+1);
+   png_write_chunk_data(png_ptr, (png_bytep)hbuf, png_strlen(hbuf));
 
    png_write_chunk_end(png_ptr);
 }
@@ -1481,15 +1546,15 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width,
 
    png_debug(1, "in png_write_sCAL_s\n");
 
-   strcpy(wbuf,(const char *)width);
-   strcpy(hbuf,(const char *)height);
+   png_strcpy(wbuf,(const char *)width);
+   png_strcpy(hbuf,(const char *)height);
    total_len = 1 + png_strlen(wbuf)+1 + png_strlen(hbuf);
 
    png_debug1(3, "sCAL total length = %d\n", total_len);
    png_write_chunk_start(png_ptr, (png_bytep)png_sCAL, (png_uint_32)total_len);
    png_write_chunk_data(png_ptr, (png_bytep)&unit, 1);
-   png_write_chunk_data(png_ptr, (png_bytep)wbuf, strlen(wbuf)+1);
-   png_write_chunk_data(png_ptr, (png_bytep)hbuf, strlen(hbuf));
+   png_write_chunk_data(png_ptr, (png_bytep)wbuf, png_strlen(wbuf)+1);
+   png_write_chunk_data(png_ptr, (png_bytep)hbuf, png_strlen(hbuf));
 
    png_write_chunk_end(png_ptr);
 }
@@ -2607,3 +2672,4 @@ png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
    }
 #endif
 }
+#endif /* PNG_WRITE_SUPPORTED */

projects/beos/x86-shared.txt

@@ -0,0 +1,22 @@
+This project builds a shared library version of libpng on x86 BeOS.
+
+It defines PNG_USE_PNGGCCRD, which activates the assembly code in
+pnggccrd.c; this hasn't been extensively tested on BeOS.
+
+To install:
+
+1) build
+
+   Note: As of version 1.0.10, you'll get a fair number of warnings when
+         you compile pnggccrd.c.  As far as I know, these are harmless,
+         but it would be better if someone fixed them.
+
+2) copy and png.h, pngconf.h somewhere; /boot/home/config/include (which
+   you'll have to make) is a good choice
+
+3) copy libpng.so to /boot/home/config/lib
+
+4) build your libpng.so applications (remember to include libz.a as
+   well when you link)
+
+- Chris Herborth, March 27, 2001

projects/beos/x86-static.txt

@@ -0,0 +1,22 @@
+This project builds a static library version of libpng on x86 BeOS.
+
+It defines PNG_USE_PNGGCCRD, which activates the assembly code in
+pnggccrd.c; this hasn't been extensively tested on BeOS.
+
+To install:
+
+1) build
+
+   Note: As of version 1.0.10, you'll get a fair number of warnings when
+         you compile pnggccrd.c.  As far as I know, these are harmless,
+         but it would be better if someone fixed them.
+
+2) copy and png.h, pngconf.h somewhere; /boot/home/config/include (which
+   you'll have to make) is a good choice
+
+3) copy libpng.a to /boot/home/config/lib
+
+4) build your libpng.a applications (remember to include libz.a as
+   well when you link)
+
+- Chris Herborth, March 27, 2001

projects/msvc/README.txt

@@ -1,5 +1,5 @@
 Microsoft Developer Studio Build File, Format Version 6.00 for
-libpng 1.0.9beta3 (November 23, 2000) and zlib
+libpng 1.2.6beta1 (October 22, 2002) and zlib
 
 Copyright (C) 2000 Simon-Pierre Cadieux
 For conditions of distribution and use, see copyright notice in png.h
@@ -9,14 +9,19 @@ Assumes that zlib sources have been copied to ..\..\..\zlib
 
 To build:
 
-1) On the main menu Select "Build|Set Active configuration". 
+0) On the main menu, select "File | Open Workspace" and then
+   select "libpng.dsw".
+
+1) On the main menu Select "Build | Set Active configuration". 
    Among the configurations beginning with "libpng" select the 
    one you wish to build (the corresponding "zlib" configuration
    will be built automatically).
 
-2) Select "Build|Clean"
+2) Select "Build | Clean"
 
-3) Select "Build|Rebuild All"
+3) Select "Build | Rebuild All".  Ignore warning messages about
+   not being able to find certain include files (e.g., m68881.h,
+   alloc.h).
 
 4) Look in the appropriate "win32" subdirectories for both "zlib"
    and "libpng" binaries.
@@ -24,14 +29,16 @@ To build:
 This project will build the PNG Development Group's "official" versions of
 libpng and zlib libraries:
 
-   libpng1.dll          (default version, currently C code only)
-   libpng1a.dll         (C + Assembler version)
-   libpng1b.dll         (C + Assembler debug version)
-   libpng1d.dll         (C code debug version)
-   libpng1[c,e-m].dll   (reserved for official versions) 
-   libpng1[n-z].dll     (available for private versions)
+   libpng13.dll          (default version, currently C code only)
+   libpng13a.dll         (C + Assembler version)
+   libpng13b.dll         (C + Assembler debug version)
+   libpng13d.dll         (C code debug version)
+   libpng13vb.dll       (version for VB, uses "stdcall" protocol)
+   libpng13[c,e-m].dll   (reserved for official versions) 
+   libpng13[n-z].dll     (available for private versions)
    zlib.dll             (default version, currently C code only)
    zlibd.dll            (debug version)
+   zlibvb.dll           (version for Visual Basic, uses "stdcall" protocol)
 
 If you change anything in libpng, or select different compiler settings,
 please change the library name to an unreserved name, and define
@@ -45,3 +52,6 @@ above mentioned libraries you should also include this DLL in your package.
 For a list of files that are redistributable in Visual C++ 6.0, see
 Common\Redist\Redist.txt on Disc 1 of the Visual C++ 6.0 product CDs. 
 
+5) For an example workspace that builds an application using the resulting
+   DLLs, go to Libpng's contrib\msvctest directory and use it to build
+   and run "pngtest".

projects/msvc/libpng.dsp

@@ -24,6 +24,7 @@ CFG=libpng - Win32 DLL
 !MESSAGE "libpng - Win32 DLL Debug ASM" (based on "Win32 (x86) Dynamic-Link Library")
 !MESSAGE "libpng - Win32 LIB" (based on "Win32 (x86) Static Library")
 !MESSAGE "libpng - Win32 LIB Debug" (based on "Win32 (x86) Static Library")
+!MESSAGE "libpng - Win32 DLL VB" (based on "Win32 (x86) Dynamic-Link Library")
 !MESSAGE 
 
 # Begin Project
@@ -56,7 +57,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 /nologo /dll /machine:I386
-# ADD LINK32 /nologo /dll /machine:I386 /out:".\win32\libpng\dll\libpng1.dll"
+# ADD LINK32 /nologo /dll /machine:I386 /out:".\win32\libpng\dll\libpng13.dll"
 # SUBTRACT LINK32 /pdb:none
 
 !ELSEIF  "$(CFG)" == "libpng - Win32 DLL Debug"
@@ -84,7 +85,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 /nologo /dll /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 /nologo /dll /debug /machine:I386 /out:".\win32\libpng\dll_dbg\libpng1d.dll"
+# ADD LINK32 /nologo /dll /debug /machine:I386 /out:".\win32\libpng\dll_dbg\libpng13d.dll"
 
 !ELSEIF  "$(CFG)" == "libpng - Win32 DLL ASM"
 
@@ -111,7 +112,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 /nologo /dll /machine:I386
-# ADD LINK32 /nologo /dll /machine:I386 /out:".\win32\libpng\dll_asm\libpng1a.dll"
+# ADD LINK32 /nologo /dll /machine:I386 /out:".\win32\libpng\dll_asm\libpng13a.dll"
 # SUBTRACT LINK32 /pdb:none
 
 !ELSEIF  "$(CFG)" == "libpng - Win32 DLL Debug ASM"
@@ -133,13 +134,13 @@ CPP=cl.exe
 MTL=midl.exe
 RSC=rc.exe
 # ADD BASE RSC /l 0x409 /d "_DEBUG"
-# ADD RSC /l 0x409 /i "..\.." /d "_DEBUG" /d PNG_DEBUG=1  /d "PNG_USE_PNGVCRD"
+# ADD RSC /l 0x409 /i "..\.." /d "_DEBUG" /d PNG_DEBUG=1 /d "PNG_USE_PNGVCRD"
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 /nologo /dll /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 /nologo /dll /debug /machine:I386 /out:".\win32\libpng\dll_dbga\libpng1b.dll"
+# ADD LINK32 /nologo /dll /debug /machine:I386 /out:".\win32\libpng\dll_dbga\libpng13b.dll"
 
 !ELSEIF  "$(CFG)" == "libpng - Win32 LIB"
 
@@ -193,6 +194,36 @@ LIB32=link.exe -lib
 # ADD BASE LIB32 /nologo
 # ADD LIB32 /nologo
 
+!ELSEIF  "$(CFG)" == "libpng - Win32 DLL VB"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "libpng___Win32_DLL_VB"
+# PROP BASE Intermediate_Dir "libpng___Win32_DLL_VB"
+# PROP BASE Ignore_Export_Lib 0
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir ".\win32\libpng\dll_vb"
+# PROP Intermediate_Dir ".\win32\libpng\dll_vb"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MD /W3 /O1 /I "..\.." /I "..\..\..\zlib" /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "PNG_BUILD_DLL" /D "ZLIB_DLL" /Yu"png.h" /FD /c
+# ADD CPP /nologo /Gd /MD /W3 /O1 /I "..\.." /I "..\..\..\zlib" /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "PNG_BUILD_DLL" /D "ZLIB_DLL" /D PNGAPI=__stdcall /Yu"png.h" /FD /c
+MTL=midl.exe
+RSC=rc.exe
+# ADD BASE RSC /l 0x409 /i "..\.." /d "NDEBUG"
+# ADD RSC /l 0x409 /i "..\.." /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 /nologo /dll /machine:I386 /out:".\win32\libpng\dll\libpng13.dll"
+# SUBTRACT BASE LINK32 /pdb:none
+# ADD LINK32 /nologo /dll /machine:I386 /out:".\win32\libpng\dll_vb\libpngvb13.dll"
+# SUBTRACT LINK32 /pdb:none
+
 !ENDIF 
 
 # Begin Target
@@ -203,6 +234,7 @@ LIB32=link.exe -lib
 # Name "libpng - Win32 DLL Debug ASM"
 # Name "libpng - Win32 LIB"
 # Name "libpng - Win32 LIB Debug"
+# Name "libpng - Win32 DLL VB"
 # Begin Group "Source Files"
 
 # PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
@@ -231,6 +263,8 @@ SOURCE=.\png.rc
 
 # PROP Exclude_From_Build 1
 
+!ELSEIF  "$(CFG)" == "libpng - Win32 DLL VB"
+
 !ENDIF 
 
 # End Source File
@@ -254,6 +288,8 @@ SOURCE=.\png32ms.def
 
 # PROP Exclude_From_Build 1
 
+!ELSEIF  "$(CFG)" == "libpng - Win32 DLL VB"
+
 !ENDIF 
 
 # End Source File
@@ -322,6 +358,11 @@ SOURCE=..\..\pngvcrd.c
 
 # PROP Exclude_From_Build 1
 
+!ELSEIF  "$(CFG)" == "libpng - Win32 DLL VB"
+
+# PROP BASE Exclude_From_Build 1
+# PROP Exclude_From_Build 1
+
 !ENDIF 
 
 # End Source File
@@ -361,7 +402,38 @@ SOURCE=..\..\pngconf.h
 # Begin Source File
 
 SOURCE=.\readme.txt
+
+!IF  "$(CFG)" == "libpng - Win32 DLL"
+
 # PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "libpng - Win32 DLL Debug"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "libpng - Win32 DLL ASM"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "libpng - Win32 DLL Debug ASM"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "libpng - Win32 LIB"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "libpng - Win32 LIB Debug"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "libpng - Win32 DLL VB"
+
+# PROP BASE Exclude_From_Build 1
+# PROP Exclude_From_Build 1
+
+!ENDIF 
+
 # End Source File
 # End Target
 # End Project

projects/msvc/png.rc

@@ -81,7 +81,7 @@ BEGIN
       VALUE "FileDescription", "PNG image compression library\000"
       VALUE "FileVersion", PNG_LIBPNG_VER_STRING "\000"
       VALUE "InternalName", PNG_LIBPNG_DLLFNAME QUOTE(PNG_LIBPNG_VER_MAJOR) DLLFNAME_POSTFIX " (Windows 32 bit)\000"
-      VALUE "LegalCopyright", "\251 1998-2000 Glenn Randers-Pehrson\000"
+      VALUE "LegalCopyright", "\251 1998-2002 Glenn Randers-Pehrson\000"
       VALUE "OriginalFilename", PNG_LIBPNG_DLLFNAME QUOTE(PNG_LIBPNG_VER_MAJOR) DLLFNAME_POSTFIX ".DLL\000"
 #ifdef PRIVATEBUILD
       VALUE "PrivateBuild", PRIVATEBUILD

projects/msvc/png32ms.def

@@ -6,7 +6,7 @@ LIBRARY
 DESCRIPTION "PNG image compression library for Windows"
 
 EXPORTS
-;Version 1.0.9beta3
+;Version 1.2.6beta1
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3
@@ -77,12 +77,14 @@ EXPORTS
   png_malloc    @68
   png_memcpy_check    @69
   png_memset_check    @70
+; png_permit_empty_plte is deprecated
   png_permit_empty_plte  @71
   png_process_data    @72
   png_progressive_combine_row  @73
   png_read_end    @74
   png_read_image    @75
   png_read_info    @76
+; png_read_init is deprecated
   png_read_init    @77
   png_read_png    @78
   png_read_row    @79
@@ -168,11 +170,51 @@ EXPORTS
   png_write_image    @159
   png_write_info    @160
   png_write_info_before_PLTE  @161
+; png_write_init is deprecated
   png_write_init    @162
   png_write_png    @163
   png_write_row    @164
   png_write_rows    @165
+; png_read_init_2 and png_write_init_2 are deprecated.
   png_read_init_2    @166
   png_write_init_2    @167
   png_access_version_number  @168
 ;  png_sig_bytes    @169
+;  png_libpng_ver    @170
+  png_init_io    @171
+  png_convert_to_rfc1123     @172
+  png_set_invalid  @173
+; Added at version 1.0.12
+; For compatiblity with 1.0.7-1.0.11
+  png_info_init @174
+  png_read_init_3    @175
+  png_write_init_3    @176
+  png_info_init_3 @177
+  png_destroy_struct  @178
+; Added at version 1.2.0
+; For use with PNG_USER_MEM_SUPPORTED
+  png_destroy_struct_2  @179
+  png_create_read_struct_2 @180
+  png_create_write_struct_2 @181
+  png_malloc_default @182
+  png_free_default @183
+; MNG features
+  png_permit_mng_features  @184
+; MMX support
+  png_mmx_support  @185
+  png_get_mmx_flagmask  @186
+  png_get_asm_flagmask  @187
+  png_get_asm_flags  @188
+  png_get_mmx_bitdepth_threshold  @189
+  png_get_mmx_rowbytes_threshold  @190
+  png_set_asm_flags  @191
+  png_init_mmx_flags  @192
+; Strip error numbers
+  png_set_strip_error_numbers @193
+; Added at version 1.2.2
+  png_handle_as_unknown @194
+; Added at version 1.2.2 and deleted from 1.2.3
+; png_zalloc @195
+; png_zfree @196
+; Added at version 1.2.4
+  png_malloc_warn @195

projects/msvc/zlib.dsp

@@ -24,6 +24,7 @@ CFG=zlib - Win32 DLL
 !MESSAGE "zlib - Win32 DLL Debug ASM" (based on "Win32 (x86) Dynamic-Link Library")
 !MESSAGE "zlib - Win32 LIB" (based on "Win32 (x86) Static Library")
 !MESSAGE "zlib - Win32 LIB Debug" (based on "Win32 (x86) Static Library")
+!MESSAGE "zlib - Win32 DLL VB" (based on "Win32 (x86) Dynamic-Link Library")
 !MESSAGE 
 
 # Begin Project
@@ -193,6 +194,36 @@ LIB32=link.exe -lib
 # ADD BASE LIB32 /nologo
 # ADD LIB32 /nologo
 
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL VB"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "zlib___Win32_DLL_VB"
+# PROP BASE Intermediate_Dir "zlib___Win32_DLL_VB"
+# PROP BASE Ignore_Export_Lib 0
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir ".\win32\zlib\dll_vb"
+# PROP Intermediate_Dir ".\win32\zlib\dll_vb"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+CPP=cl.exe
+# ADD BASE CPP /nologo /MD /W3 /O1 /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "ZLIB_DLL" /FD /c
+# ADD CPP /nologo /Gd /MD /W3 /O1 /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "ZLIB_DLL" /FD /c
+MTL=midl.exe
+RSC=rc.exe
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 /nologo /dll /machine:I386
+# SUBTRACT BASE LINK32 /pdb:none
+# ADD LINK32 /nologo /dll /machine:I386 /out:".\win32\zlib\dll_vb/zlibvb.dll"
+# SUBTRACT LINK32 /pdb:none
+
 !ENDIF 
 
 # Begin Target
@@ -203,6 +234,7 @@ LIB32=link.exe -lib
 # Name "zlib - Win32 DLL Debug ASM"
 # Name "zlib - Win32 LIB"
 # Name "zlib - Win32 LIB Debug"
+# Name "zlib - Win32 DLL VB"
 # Begin Group "Source Files"
 
 # PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
@@ -246,6 +278,11 @@ SOURCE=..\..\..\zlib\contrib\asm386\gvmat32c.c
 
 # PROP Exclude_From_Build 1
 
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL VB"
+
+# PROP BASE Exclude_From_Build 1
+# PROP Exclude_From_Build 1
+
 !ENDIF 
 
 # End Source File
@@ -312,6 +349,8 @@ SOURCE=.\zlib.def
 
 # PROP Exclude_From_Build 1
 
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL VB"
+
 !ENDIF 
 
 # End Source File
@@ -335,6 +374,8 @@ SOURCE=..\..\..\zlib\msdos\zlib.rc
 
 # PROP Exclude_From_Build 1
 
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL VB"
+
 !ENDIF 
 
 # End Source File

projects/netware.txt

@@ -0,0 +1,6 @@
+A set of project files is available for Netware.  Get
+libpng-1.2.6beta1-project-netware.zip from a libpng distribution
+site such as http://libpng.sourceforge.net
+
+Put the zip file in this directory (projects) and then run
+"unzip -a libpng-1.2.6beta1-project-netware.zip"

projects/wince.txt

@@ -0,0 +1,6 @@
+A set of project files is available for WinCE.  Get
+libpng-1.2.6beta1-project-wince.zip from a libpng distribution
+site such as http://libpng.sourceforge.net
+
+Put the zip file in this directory (projects) and then run
+"unzip -a libpng-1.2.6beta1-project-wince.zip"

projects/wince/READMEE.WCE

@@ -1,43 +0,0 @@
-libpng for WindowsCE Rel.1.0
-============================
- Copyright (c) 2000 Glenn Randers-Pehrson
- Copyright (c) 2000 Tenik Co.,Ltd.
-
- Porting for WindowsCE by Tenik Co.,Ltd.(Kazuo Adachi)
-
-
-Introduction
-============
-This is libpng 1.0.9beta3 ported to WindowsCE 2.0 and 2.11.
-libpng 1.0.9beta3 is a PNG reference library.
-See README, a document of original libpng 1.0.9beta3.
-
-zlib for WindowsCE
-==================
-This library requires zlib for WindowsCE.  You can use the supplied
-zlib.diff and zlibce.def files to add WindowsCE support to libpng-1.1.3.
-
-Copyright notice
-================
-This software is provided 'as-is', without any express or implied
-warranty.  In no event will the authors be held liable for any damages
-arising from the use of this software.
-
-See README and LICENSE, documents of original libpng 1.0.9beta3, for conditions
-of use and distribution.
-
-Files
-=====
-
- READMEE.WCE - this file(in English)
- READMEJ.WCE - this file(in Japanese)
- png32ce.def - module definition file to make DLLs
-
-Sample programs(../../pngtest.c and ../../contrib/*) can build on WindowsCE
-2.11.  WindowsCE 2.0 and below do not support 'console' functions.
-
-Author
-======
-Tenik Co.,Ltd.
-Kazuo Adachi
-adachi@tenik.co.jp

projects/wince/READMEJ.WCE

@@ -1,44 +0,0 @@
-libpng for WindowsCE Rel.1.0
-============================
- Copyright (c) 2000 Glenn Randers-Pehrson
- Copyright (c) 2000 Tenik Co.,Ltd.
-
- Porting for WindowsCE by Tenik Co.,Ltd.(Kazuo Adachi)
-
-
-<EFBFBD>͂<EFBFBD><EFBFBD>߂<EFBFBD>
-========
-libpng for WindowsCE<43><45> PNG<4E>`<60><><EFBFBD>̉摜<CC89>f<EFBFBD>[<5B>^<5E><><EFBFBD>C<EFBFBD>u<EFBFBD><75><EFBFBD><EFBFBD> libpng<6E><67>WindowsCE
-<EFBFBD>łł<EFBFBD><EFBFBD>Blibpng<EFBFBD>ɂ‚<EFBFBD><EFBFBD>Ă̏ڂ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>́A<EFBFBD>t<EFBFBD><EFBFBD><EFBFBD><EFBFBD> README <20><><EFBFBD><EFBFBD><EFBFBD>ǂ݂<C782><DD82><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>B
-
-zlib for WindowsCE
-==================
-libpng<EFBFBD>ł́A<EFBFBD>f<EFBFBD>[<5B>^<5E><><EFBFBD>k<EFBFBD><6B><EFBFBD>C<EFBFBD>u<EFBFBD><75><EFBFBD><EFBFBD><EFBFBD>Ƃ<EFBFBD><C682><EFBFBD> zlib<69><62><EFBFBD>g<EFBFBD>p<EFBFBD><70><EFBFBD>Ă<EFBFBD><C482>܂<EFBFBD><DC82>Blibpng<6E><67>
-<EFBFBD><EFBFBD><EFBFBD>p<EFBFBD><EFBFBD><EFBFBD>邽<EFBFBD>߂ɂ́A<EFBFBD>ʓr zlib<69><62><EFBFBD>p<EFBFBD>ӂ<EFBFBD><D382><EFBFBD><EFBFBD>K<EFBFBD>v<EFBFBD><76><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>܂<EFBFBD><DC82>B
-
-<EFBFBD>Ȃ<EFBFBD><EFBFBD>A<EFBFBD><EFBFBD><EFBFBD>̃p<EFBFBD>b<EFBFBD>P<EFBFBD>[<5B>W<EFBFBD>ŗ<EFBFBD><C597>p<EFBFBD>ł<EFBFBD><C582><EFBFBD> zlib<69>͎<EFBFBD><CD8E>̍쐬<CC8D><EC90AC><EFBFBD><EFBFBD> zlibce.dll<6C>ł<EFBFBD><C582>B
-
-<EFBFBD>g<EFBFBD>p<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
-========
-<EFBFBD><EFBFBD><EFBFBD>̃\<5C>t<EFBFBD>g<EFBFBD>E<EFBFBD>F<EFBFBD>A<EFBFBD>͖<EFBFBD><CD96>ۏ؂ł<D882><C582>B<EFBFBD><42><EFBFBD>̃\<5C>t<EFBFBD>g<EFBFBD>E<EFBFBD>F<EFBFBD>A<EFBFBD><41><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ŗ<EFBFBD><C597>p<EFBFBD>҂<EFBFBD><D282><EFBFBD><EFBFBD>邱<EFBFBD><E982B1>
-<EFBFBD>ɂȂ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȃ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Q<EFBFBD>ɂ‚<EFBFBD><EFBFBD>Ă<EFBFBD><EFBFBD>A<EFBFBD><EFBFBD><EFBFBD>ҁA<EFBFBD>z<EFBFBD>z<EFBFBD>ҁA<EFBFBD><EFBFBD><EFBFBD>̑<EFBFBD><EFBFBD><EFBFBD><EFBFBD>p<EFBFBD>҈ȊO<EFBFBD>̐l<EFBFBD><EFBFBD><EFBFBD>A
-<EFBFBD>c<EFBFBD>̂ɐӔC<EFBFBD><EFBFBD><EFBFBD>Ƃ<EFBFBD><EFBFBD>`<60><><EFBFBD>͂Ȃ<CD82><C882><EFBFBD><EFBFBD>̂Ƃ<CC82><C682>܂<EFBFBD><DC82>B
-
-<EFBFBD><EFBFBD><EFBFBD>̑<EFBFBD><EFBFBD>A<EFBFBD><EFBFBD><EFBFBD>̃\<5C>t<EFBFBD>g<EFBFBD>E<EFBFBD>F<EFBFBD>A<EFBFBD>̗<EFBFBD><CC97>p<EFBFBD><70><EFBFBD><EFBFBD><EFBFBD>ɂ‚<C982><C282>ẮA<CD81><41><EFBFBD>łł<C582><C582><EFBFBD> libpng 1.0.9beta3<EFBFBD><EFBFBD>
-<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̂Ƃ<EFBFBD><EFBFBD>܂<EFBFBD><EFBFBD>B<EFBFBD>ڂ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>́A<EFBFBD>t<EFBFBD><EFBFBD><EFBFBD><EFBFBD> README,LICENSE <20><><EFBFBD><EFBFBD><EFBFBD>ǂ݂<C782><DD82><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>B
-
-<EFBFBD><EFBFBD><EFBFBD>^<5E><><EFBFBD>e
-========
-
- READMEJ.WCE - <20><><EFBFBD>̃t<CC83>@<40>C<EFBFBD><43>
- READMEE.WCE - <20><><EFBFBD>̃t<CC83>@<40>C<EFBFBD><43>(<28>p<EFBFBD><70>)
- png32ce.def - DLL<4C>쐬<EFBFBD>p <20><><EFBFBD>`<60>t<EFBFBD>@<40>C<EFBFBD><43>
-
-<EFBFBD>t<EFBFBD><EFBFBD><EFBFBD>T<EFBFBD><EFBFBD><EFBFBD>v<EFBFBD><EFBFBD><EFBFBD>E<EFBFBD>v<EFBFBD><EFBFBD><EFBFBD>O<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>́A<EFBFBD><EFBFBD><EFBFBD>b<EFBFBD>Z<EFBFBD>[<5B>W<EFBFBD>o<EFBFBD>͂̓s<CC93><73><EFBFBD><EFBFBD><EFBFBD>AWindowsCE 2.11<EFBFBD>ȍ~
-<EFBFBD>ł̂ݎg<EFBFBD>p<EFBFBD>”\<5C>ł<EFBFBD><C582>B
-
-<EFBFBD>z<EFBFBD>z<EFBFBD><EFBFBD>
-======
-<EFBFBD>e<EFBFBD>j<EFBFBD>b<EFBFBD>N<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20>J<EFBFBD><4A><EFBFBD><EFBFBD>
-<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20>a<EFBFBD>Y
-adachi@tenik.co.jp

projects/wince/READMEZE.WCE

@@ -1,39 +0,0 @@
-zlib for WindowsCE Rel.1.0
-==========================
- (C) 1995-1998 Jean-loup Gailly and Mark Adler
- (C) 2000      Tenik Co.,Ltd.
-
- Porting for WindowsCE by Tenik Co.,Ltd.(Kazuo Adachi)
-
-
-Introduction
-============
-This is zlib 1.1.3 ported to WindowsCE 2.0 and 2.11.
-zlib 1.1.3 is a general purpose data compression library.
-See README, a document of original zlib 1.1.3.
-
-Copyright notice
-================
-This software is provided 'as-is', without any express or implied
-warranty.  In no event will the authors be held liable for any damages
-arising from the use of this software.
-
-See README, a document of original zlib 1.1.3, for conditions of use and
-distribution.
-
-Files
-=====
-
- READMEE.WCE - this file(in English)
- READMEJ.WCE - this file(in Japanese)
- zlibce.def  - module definition file to make DLLs
- zlibce.diff - patch file for source code
-
-Sample programs(minigzip.c and example.c) can build on WindowsCE 2.11.
-WindowsCE 2.0 and below is not support 'console' functions.
-
-Author
-======
-Tenik Co.,Ltd.
-Kazuo Adachi
-adachi@tenik.co.jp

projects/wince/READMEZJ.WCE

@@ -1,41 +0,0 @@
-zlib for WindowsCE Rel.1.0
-==========================
- (C) 1995-1998 Jean-loup Gailly and Mark Adler
- (C) 2000      Tenik Co.,Ltd.
-
- Porting for WindowsCE by Tenik Co.,Ltd.(Kazuo Adachi)
-
-
-<EFBFBD>͂<EFBFBD><EFBFBD>߂<EFBFBD>
-========
-zlib for WindowsCE<43>͔ėp<C497>̃f<CC83>[<5B>^<5E><><EFBFBD>k<EFBFBD><6B><EFBFBD>C<EFBFBD>u<EFBFBD><75><EFBFBD><EFBFBD> zlib<69><62> WindowsCE<43>łł<C582><C582>B
-zlib<EFBFBD>ɂ‚<EFBFBD><EFBFBD>Ă̏ڂ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>́A<EFBFBD>t<EFBFBD><EFBFBD><EFBFBD><EFBFBD> README <20><><EFBFBD><EFBFBD><EFBFBD>ǂ݂<C782><DD82><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>B
-
-<EFBFBD>g<EFBFBD>p<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
-========
-<EFBFBD><EFBFBD><EFBFBD>̃\<5C>t<EFBFBD>g<EFBFBD>E<EFBFBD>F<EFBFBD>A<EFBFBD>͖<EFBFBD><CD96>ۏ؂ł<D882><C582>B<EFBFBD><42><EFBFBD>̃\<5C>t<EFBFBD>g<EFBFBD>E<EFBFBD>F<EFBFBD>A<EFBFBD><41><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ŗ<EFBFBD><C597>p<EFBFBD>҂<EFBFBD><D282><EFBFBD><EFBFBD>邱<EFBFBD><E982B1>
-<EFBFBD>ɂȂ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȃ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Q<EFBFBD>ɂ‚<EFBFBD><EFBFBD>Ă<EFBFBD><EFBFBD>A<EFBFBD><EFBFBD><EFBFBD>ҁA<EFBFBD>z<EFBFBD>z<EFBFBD>ҁA<EFBFBD><EFBFBD><EFBFBD>̑<EFBFBD><EFBFBD><EFBFBD><EFBFBD>p<EFBFBD>҈ȊO<EFBFBD>̐l<EFBFBD><EFBFBD><EFBFBD>A
-<EFBFBD>c<EFBFBD>̂ɐӔC<EFBFBD><EFBFBD><EFBFBD>Ƃ<EFBFBD><EFBFBD>`<60><><EFBFBD>͂Ȃ<CD82><C882><EFBFBD><EFBFBD>̂Ƃ<CC82><C682>܂<EFBFBD><DC82>B
-
-<EFBFBD><EFBFBD><EFBFBD>̑<EFBFBD><EFBFBD>A<EFBFBD><EFBFBD><EFBFBD>̃\<5C>t<EFBFBD>g<EFBFBD>E<EFBFBD>F<EFBFBD>A<EFBFBD>̗<EFBFBD><CC97>p<EFBFBD><70><EFBFBD><EFBFBD><EFBFBD>ɂ‚<C982><C282>ẮA<CD81><41><EFBFBD>łł<C582><C582><EFBFBD> zlib 1.1.3<EFBFBD><EFBFBD>
-<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̂Ƃ<EFBFBD><EFBFBD>܂<EFBFBD><EFBFBD>B<EFBFBD>ڂ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>́A<EFBFBD>t<EFBFBD><EFBFBD><EFBFBD><EFBFBD> README <20><><EFBFBD><EFBFBD><EFBFBD>ǂ݂<C782><DD82><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>B
-
-<EFBFBD><EFBFBD><EFBFBD>^<5E><><EFBFBD>e
-========
-
- READMEJ.WCE - <20><><EFBFBD>̃t<CC83>@<40>C<EFBFBD><43>
- READMEE.WCE - <20><><EFBFBD>̃t<CC83>@<40>C<EFBFBD><43>(<28>p<EFBFBD><70>)
- zlibce.diff - <20>\<5C>[<5B>X<EFBFBD>R<EFBFBD>[<5B>h<EFBFBD><68><EFBFBD><EFBFBD><EFBFBD>t<EFBFBD>@<40>C<EFBFBD><43>
- zlibce.def  - DLL<4C>쐬<EFBFBD>p <20><><EFBFBD>`<60>t<EFBFBD>@<40>C<EFBFBD><43>
-
-<EFBFBD><EFBFBD><EFBFBD>ł<EFBFBD> zlib 1.1.3<EFBFBD>Ƃ̍ő<EFBFBD><EFBFBD>̈Ⴂ<EFBFBD>́Agzio.c<>̃R<CC83>[<5B>h<EFBFBD>ł<EFBFBD><C582>BWindowsCE<43>ɂ<EFBFBD>
-stdio.h(open<65><6E><EFBFBD>̊֐<CC8A>)<29><><EFBFBD><EFBFBD><EFBFBD>݂<EFBFBD><DD82>Ȃ<EFBFBD><C882><EFBFBD><EFBFBD>߁A<DF81>Ǝ<EFBFBD><C68E><EFBFBD> gziowce.c<><63><EFBFBD>쐬<EFBFBD><EC90AC><EFBFBD>܂<EFBFBD><DC82><EFBFBD><EFBFBD>B
-
-minigzip.c<><63> example.c<>̕t<CC95><74><EFBFBD>T<EFBFBD><54><EFBFBD>v<EFBFBD><76><EFBFBD>E<EFBFBD>v<EFBFBD><76><EFBFBD>O<EFBFBD><4F><EFBFBD><EFBFBD><EFBFBD>́A<CD81><41><EFBFBD>b<EFBFBD>Z<EFBFBD>[<5B>W<EFBFBD>o<EFBFBD>͂<EFBFBD>
-<EFBFBD>s<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>AWindowsCE 2.11<EFBFBD>ȍ~<7E>ł̂ݎg<DD8E>p<EFBFBD>”\<5C>ł<EFBFBD><C582>B
-
-<EFBFBD>z<EFBFBD>z<EFBFBD><EFBFBD>
-======
-<EFBFBD>e<EFBFBD>j<EFBFBD>b<EFBFBD>N<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20>J<EFBFBD><4A><EFBFBD><EFBFBD>
-<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20>a<EFBFBD>Y
-adachi@tenik.co.jp

projects/wince/lpngce.dsw

@@ -1,44 +0,0 @@
-Microsoft Developer Studio Workspace File, Format Version 6.00
-# WARNING: DO NOT EDIT OR DELETE THIS WORKSPACE FILE!
-
-###############################################################################
-
-Project: "lpngce"=.\lpngce.dsp - Package Owner=<4>
-
-Package=<5>
-{{{
-}}}
-
-Package=<4>
-{{{
-    Begin Project Dependency
-    Project_Dep_Name zlibce
-    End Project Dependency
-}}}
-
-###############################################################################
-
-Project: "zlibce"=.\zlibce.dsp - Package Owner=<4>
-
-Package=<5>
-{{{
-}}}
-
-Package=<4>
-{{{
-}}}
-
-###############################################################################
-
-Global:
-
-Package=<5>
-{{{
-}}}
-
-Package=<3>
-{{{
-}}}
-
-###############################################################################
-

projects/wince/png32ce.def

@@ -1,180 +0,0 @@
-;------------------------------------------
-; LIBPNG module definition file for Windows
-;------------------------------------------
-
-LIBRARY lpngce
-
-EXPORTS
-;Version 1.0.9beta3
-  png_build_grayscale_palette  @1
-  png_check_sig        @2
-  png_chunk_error      @3
-  png_chunk_warning      @4
-;  png_convert_from_struct_tm   @5
-;  png_convert_from_time_t    @6
-  png_create_info_struct     @7
-  png_create_read_struct     @8
-  png_create_write_struct    @9
-  png_data_freer    @10
-  png_destroy_info_struct  @11
-  png_destroy_read_struct  @12
-  png_destroy_write_struct  @13
-  png_error    @14
-  png_free      @15
-  png_free_data    @16
-  png_get_IHDR    @17
-  png_get_PLTE    @18
-  png_get_bKGD    @19
-  png_get_bit_depth    @20
-  png_get_cHRM    @21
-  png_get_cHRM_fixed  @22
-  png_get_channels    @23
-  png_get_color_type  @24
-  png_get_compression_buffer_size  @25
-  png_get_compression_type  @26
-  png_get_copyright    @27
-  png_get_error_ptr    @28
-  png_get_filter_type  @29
-  png_get_gAMA    @30
-  png_get_gAMA_fixed  @31
-  png_get_hIST    @32
-  png_get_header_ver  @33
-  png_get_header_version  @34
-  png_get_iCCP    @35
-  png_get_image_height  @36
-  png_get_image_width  @37
-  png_get_interlace_type  @38
-  png_get_io_ptr    @39
-  png_get_libpng_ver  @40
-  png_get_oFFs    @41
-  png_get_pCAL    @42
-  png_get_pHYs    @43
-  png_get_pixel_aspect_ratio  @44
-  png_get_pixels_per_meter  @45
-  png_get_progressive_ptr  @46
-  png_get_rgb_to_gray_status  @47
-  png_get_rowbytes    @48
-  png_get_rows    @49
-  png_get_sBIT    @50
-  png_get_sCAL    @51
-  png_get_sPLT    @52
-  png_get_sRGB    @53
-  png_get_signature    @54
-  png_get_tIME    @55
-  png_get_tRNS    @56
-  png_get_text    @57
-  png_get_unknown_chunks  @58
-  png_get_user_chunk_ptr  @59
-  png_get_user_transform_ptr  @60
-  png_get_valid    @61
-  png_get_x_offset_microns  @62
-  png_get_x_offset_pixels  @63
-  png_get_x_pixels_per_meter  @64
-  png_get_y_offset_microns  @65
-  png_get_y_offset_pixels  @66
-  png_get_y_pixels_per_meter  @67
-  png_malloc    @68
-  png_memcpy_check    @69
-  png_memset_check    @70
-  png_permit_empty_plte  @71
-  png_process_data    @72
-  png_progressive_combine_row  @73
-  png_read_end    @74
-  png_read_image    @75
-  png_read_info    @76
-  png_read_init    @77
-  png_read_png    @78
-  png_read_row    @79
-  png_read_rows    @80
-  png_read_update_info  @81
-  png_reset_zstream    @82
-  png_set_IHDR    @83
-  png_set_PLTE    @84
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-  png_set_shift    @134
-  png_set_sig_bytes    @135
-  png_set_strip_16    @136
-  png_set_strip_alpha  @137
-  png_set_swap    @138
-  png_set_swap_alpha  @139
-  png_set_tIME    @140
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-  png_set_tRNS_to_alpha  @142
-  png_set_text    @143
-  png_set_unknown_chunk_location  @144
-  png_set_unknown_chunks  @145
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-  png_set_write_fn    @147
-  png_set_write_status_fn  @148
-  png_set_write_user_transform_fn  @149
-  png_sig_cmp    @150
-  png_start_read_image  @151
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-  png_write_chunk    @153
-  png_write_chunk_data  @154
-  png_write_chunk_end  @155
-  png_write_chunk_start  @156
-  png_write_end    @157
-  png_write_flush    @158
-  png_write_image    @159
-  png_write_info    @160
-  png_write_info_before_PLTE  @161
-  png_write_init    @162
-  png_write_png    @163
-  png_write_row    @164
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-  png_read_init_2    @166
-  png_write_init_2    @167
-  png_access_version_number  @168
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-  png_libpng_ver    @170
-  png_init_io    @171
-  png_convert_to_rfc1123     @172

projects/wince/pngtest.dsp

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-SOURCE=..\pngtest.c
-
-!IF  "$(CFG)" == "pngtest - Win32 (WCE MIPS) Release"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE MIPS) Debug"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE SH4) Release"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE SH4) Debug"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE SH3) Release"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE SH3) Debug"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE ARM) Release"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE ARM) Debug"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE MIPSFP) Release"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE MIPSFP) Debug"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE x86) Release"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE x86) Debug"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE x86em) Release"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE x86em) Debug"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE PPC) Release"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE PPC) Debug"
-
-DEP_CPP_PNGTE=\
-	"..\..\..\zlib\zconf.h"\
-	"..\..\..\zlib\zlib.h"\
-	"..\..\png.h"\
-	"..\..\pngasmrd.h"\
-	"..\..\pngconf.h"\
-	
-NODEP_CPP_PNGTE=\
-	"..\..\alloc.h"\
-	
-
-!ENDIF 
-
-# End Source File
-# Begin Source File
-
-SOURCE=.\winmain.c
-
-!IF  "$(CFG)" == "pngtest - Win32 (WCE MIPS) Release"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE MIPS) Debug"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE SH4) Release"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE SH4) Debug"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE SH3) Release"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE SH3) Debug"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE ARM) Release"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE ARM) Debug"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE MIPSFP) Release"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE MIPSFP) Debug"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE x86) Release"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE x86) Debug"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE x86em) Release"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE x86em) Debug"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE PPC) Release"
-
-!ELSEIF  "$(CFG)" == "pngtest - Win32 (WCE PPC) Debug"
-
-!ENDIF 
-
-# End Source File
-# End Group
-# Begin Group "Header Files"
-
-# PROP Default_Filter "h;hpp;hxx;hm;inl"
-# End Group
-# Begin Group "Resource Files"
-
-# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"
-# End Group
-# End Target
-# End Project

projects/wince/pngtest.dsw

@@ -1,59 +0,0 @@
-Microsoft Developer Studio Workspace File, Format Version 6.00
-# WARNING: DO NOT EDIT OR DELETE THIS WORKSPACE FILE!
-
-###############################################################################
-
-Project: "lpngce"=.\lpngce.dsp - Package Owner=<4>
-
-Package=<5>
-{{{
-}}}
-
-Package=<4>
-{{{
-    Begin Project Dependency
-    Project_Dep_Name zlibce
-    End Project Dependency
-}}}
-
-###############################################################################
-
-Project: "pngtest"=.\pngtest.dsp - Package Owner=<4>
-
-Package=<5>
-{{{
-}}}
-
-Package=<4>
-{{{
-    Begin Project Dependency
-    Project_Dep_Name lpngce
-    End Project Dependency
-}}}
-
-###############################################################################
-
-Project: "zlibce"=.\zlibce.dsp - Package Owner=<4>
-
-Package=<5>
-{{{
-}}}
-
-Package=<4>
-{{{
-}}}
-
-###############################################################################
-
-Global:
-
-Package=<5>
-{{{
-}}}
-
-Package=<3>
-{{{
-}}}
-
-###############################################################################
-

projects/wince/winmain.c

@@ -1,86 +0,0 @@
-
-/* winmain.c - a simple entry point for WindowsCE
- *
- * Copyright (c) 2000 Tenik Co.,Ltd.
- */
-
-#include <windows.h>
-#include <tchar.h>
-
-extern int main(int argc, char *argv[]);
-
-int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPWSTR lpszCmdLine, int nCmdShow)
-{
-#define SIZE_ARGV   (32)
-
-    TCHAR path[MAX_PATH];
-    LPTSTR file;
-    char prog[MAX_PATH];
-    int argc;
-    char *argv[SIZE_ARGV];
-    int size;
-    char *buff;
-    char *argp;
-    char *args;
-    char quote;
-
-    // get program name
-    argc = 0;
-    GetModuleFileName(GetCurrentProcess(), path, MAX_PATH);
-    file = _tcsrchr(path, TEXT('\\'));
-    if (NULL == file) {
-        file = path;
-    }
-    else {
-        file++;
-    }
-    WideCharToMultiByte(CP_ACP, 0, file, -1, prog, MAX_PATH, NULL, NULL);
-    argv[argc++] = prog;
-
-    // analyze parameters
-    size = WideCharToMultiByte(CP_ACP, 0, lpszCmdLine, -1, NULL, 0, NULL, NULL);
-    buff = (char *)malloc(size);
-    size = WideCharToMultiByte(CP_ACP, 0, lpszCmdLine, -1, buff, size, NULL, NULL);
-    quote = 0x00;
-    args = argp = buff;
-    if (argp && *argp && size) {
-        argv[argc++] = args;
-        while (*argp) {
-            if (quote) {
-                if (*argp == quote) {
-                    argp++;
-                    if (*argp != quote) {
-                        quote = 0x00;
-                    }
-                    else {
-                        *args++ = *argp++;
-                    }
-                }
-                else {
-                    *args++ = *argp++;
-                }
-            }
-            else {
-                if (*argp == ' ') {
-                    *args++ = *argp++ = '\0';
-                    while (*argp && *argp == ' ') {
-                        argp++;
-                    }
-                    if (*argp && argc < SIZE_ARGV) {
-                        argv[argc++] = args;
-                    }
-                }
-                else {
-                    if (*argp == '\"') {
-                        quote = *argp++;
-                    }
-                    else {
-                        *args++ = *argp++;
-                    }
-                }
-            }
-        }
-    }
-    *args = '\0';
-    return main(argc, argv);
-}

projects/wince/zlibce.def

@@ -1,44 +0,0 @@
-LIBRARY     zlibce.dll
-
-EXPORTS
-    adler32                        @1
-    compress                       @2
-    crc32                          @3
-    deflate                        @4
-    deflateCopy                    @5
-    deflateEnd                     @6
-    deflateInit2_                  @7
-    deflateInit_                   @8
-    deflateParams                  @9
-    deflateReset                   @10
-    deflateSetDictionary           @11
-    gzclose                        @12
-    gzdopen                        @13
-    gzerror                        @14
-    gzflush                        @15
-    gzopen                         @16
-    gzread                         @17
-    gzwrite                        @18
-    inflate                        @19
-    inflateEnd                     @20
-    inflateInit2_                  @21
-    inflateInit_                   @22
-    inflateReset                   @23
-    inflateSetDictionary           @24
-    inflateSync                    @25
-    uncompress                     @26
-    zlibVersion                    @27
-    gzprintf                       @28
-    gzputc                         @29
-    gzgetc                         @30
-    gzseek                         @31
-    gzrewind                       @32
-    gztell                         @33
-    gzeof                          @34
-    gzsetparams                    @35
-    zError                         @36
-    inflateSyncPoint               @37
-    get_crc_table                  @38
-    compress2                      @39
-    gzputs                         @40
-    gzgets                         @41

scripts/libpng-config-body.in

@@ -0,0 +1,96 @@
+
+usage()
+{
+    cat <<EOF
+Usage: libpng-config [OPTION] ...
+
+Known values for OPTION are:
+
+  --prefix        print libpng prefix
+  --libdir        print path to directory containing library
+  --libs          print library linking information
+  --ccopts        print compiler options
+  --cppflags      print pre-processor flags
+  --cflags        print preprocessor flags, I_opts, and compiler options
+  --I_opts        print "-I" include options
+  --L_opts        print linker "-L" flags for dynamic linking
+  --R_opts        print dynamic linker "-R" or "-rpath" flags
+  --ldopts        print linker options
+  --ldflags       print linker flags (ldopts, L_opts, R_opts, and libs)
+  --static        revise subsequent outputs for static linking
+  --help          print this help and exit
+  --version       print version information
+EOF
+
+    exit $1
+}
+
+if test $# -eq 0; then
+    usage 1
+fi
+
+while test $# -gt 0; do
+    case "$1" in
+
+    --prefix)
+        echo ${prefix}
+        ;;
+
+    --version)
+        echo ${version}
+        exit 0
+        ;;
+
+    --help)
+        usage 0
+        ;;
+
+    --ccopts)
+        echo ${ccopts}
+        ;;
+
+    --cppflags)
+        echo ${cppflags}
+        ;;
+
+    --cflags)
+        echo ${I_opts} ${cppflags} ${ccopts}
+        ;;
+
+    --libdir)
+        echo ${libdir}
+        ;;
+
+    --libs)
+        echo ${libs}
+        ;;
+
+    --I_opts)
+        echo ${I_opts}
+        ;;
+
+    --L_opts)
+        echo ${L_opts}
+        ;;
+
+    --R_opts)
+        echo ${R_opts}
+        ;;
+
+    --ldflags)
+        echo ${ldflags} ${L_opts} ${R_opts} ${libs}
+        ;;
+
+    --static)
+        R_opts=""
+        ;;
+
+    *)
+        usage
+        exit 1
+        ;;
+    esac
+    shift
+done
+
+exit 0

scripts/libpng-config-head.in

@@ -0,0 +1,21 @@
+#! /bin/sh
+
+# libpng-config
+# provides configuration info for libpng.
+
+# Copyright (C) 2002 Glenn Randers-Pehrson
+# For conditions of distribution and use, see copyright notice in png.h
+
+# Modeled after libxml-config.
+
+version=1.2.6beta1
+prefix=""
+libdir=""
+libs=""
+I_opts=""
+L_opts=""
+R_opts=""
+cppflags=""
+ccopts=""
+ldopts=""
+

scripts/libpng.pc.in

@@ -0,0 +1,11 @@
+
+prefix=@PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${exec_prefix}/include
+
+Name: libpng12
+Description: Loads and saves PNG files
+Version: 1.2.6beta1
+Libs: -L${libdir} -lpng12 -lz -lm
+Cflags: -I${includedir}/libpng12

scripts/makefile.32sunu

@@ -0,0 +1,224 @@
+# makefile for libpng on Solaris 2.x with cc
+# Contributed by William L. Sebok, based on makefile.linux
+# Copyright (C) 2002 Glenn Randers-Pehrson
+# Copyright (C) 1998 Greg Roelofs
+# Copyright (C) 1996, 1997 Andreas Dilger
+# For conditions of distribution and use, see copyright notice in png.h
+
+CC=cc
+SUN_CC_FLAGS=-fast -xtarget=ultra
+SUN_LD_FLAGS=-fast -xtarget=ultra
+
+# where make install puts libpng.a, libpng12.so and libpng12/png.h
+prefix=/a
+
+# Where the zlib library and include files are located
+# Changing these to ../zlib poses a security risk.  If you want
+# to have zlib in an adjacent directory, specify the full path instead of "..".
+#ZLIBLIB=../zlib
+#ZLIBINC=../zlib
+
+ZLIBLIB=/usr/lib
+ZLIBINC=/usr/include
+
+WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
+	-Wmissing-declarations -Wtraditional -Wcast-align \
+	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion
+CFLAGS=-I$(ZLIBINC) $(SUN_CC_FLAGS) \
+	# $(WARNMORE) -g -DPNG_DEBUG=5
+LDFLAGS=$(SUN_LD_FLAGS) -L$(ZLIBLIB) -R$(ZLIBLIB) libpng.a -lz -lm
+
+#RANLIB=ranlib
+RANLIB=echo
+
+LIBNAME=libpng12
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
+PNGVER = $(PNGMAJ).$(PNGMIN)
+
+INCPATH=$(prefix)/include
+LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
+
+OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
+	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
+	pngwtran.o pngmem.o pngerror.o pngpread.o
+
+OBJSDLL = $(OBJS:.o=.pic.o)
+
+.SUFFIXES:      .c .o .pic.o
+
+.c.pic.o:
+	$(CC) -c $(CFLAGS) -KPIC -o $@ $*.c
+
+all: libpng.a $(LIBNAME).so pngtest libpng.pc libpng-config
+
+libpng.a: $(OBJS)
+	ar rc $@ $(OBJS)
+	$(RANLIB) $@
+
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
+
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo libdir=\"$(LIBPATH)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo L_opts=\"-L$(LIBPATH)\"; \
+	echo R_opts=\"-R$(LIBPATH)\"; \
+	echo ccopts=\"-xtarget=ultra\"; \
+	echo ldopts=\"-xtarget=ultra\"; \
+	echo libs=\"-lpng12 -lz -lm\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
+
+$(LIBNAME).so: $(LIBNAME).so.$(PNGMAJ)
+	ln -f -s $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so
+
+$(LIBNAME).so.$(PNGMAJ): $(LIBNAME).so.$(PNGVER)
+	ln -f -s $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ)
+
+$(LIBNAME).so.$(PNGVER): $(OBJSDLL)
+	@case "`type ld`" in *ucb*) \
+	echo; \
+	echo '## WARNING:'; \
+	echo '## The commands "CC" and "LD" must NOT refer to /usr/ucb/cc'; \
+	echo '## and /usr/ucb/ld.  If they do, you need to adjust your PATH'; \
+	echo '## environment variable to put /usr/ccs/bin ahead of /usr/ucb.'; \
+	echo '## The environment variable LD_LIBRARY_PATH should not be set'; \
+	echo '## at all.  If it is, things are likely to break because of'; \
+	echo '## the libucb dependency that is created.'; \
+	echo; \
+	;; \
+	esac
+	$(LD) -G -L$(ZLIBLIB) -R$(ZLIBLIB) -h $(LIBNAME).so.$(PNGMAJ) \
+	 -o $(LIBNAME).so.$(PNGVER) $(OBJSDLL)
+
+libpng.so.3.$(PNGMIN): $(OBJS)
+	$(LD) -G -L$(ZLIBLIB) -R$(ZLIBLIB) -h libpng.so.3 \
+	 -o libpng.so.3.$(PNGMIN)  $(OBJSDLL)
+
+pngtest: pngtest.o $(LIBNAME).so
+	$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
+
+test: pngtest
+	./pngtest
+
+install-headers: png.h pngconf.h
+	-@if [ ! -d $(DI) ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then mkdir $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h
+	-@/bin/rm $(DI)/libpng
+	(cd $(DI); ln -f -s $(LIBNAME) libpng; ln -f -s $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	chmod 644 $(DL)/$(LIBNAME).a
+	-@/bin/rm -f $(DL)/libpng.a
+	(cd $(DL); ln -f -s $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBNAME).so.$(PNGVER) libpng.pc \
+	libpng.so.3.$(PNGMIN)
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGVER)* $(DL)/$(LIBNAME).so
+	-@/bin/rm -f $(DL)/libpng.so
+	-@/bin/rm -f $(DL)/libpng.so.3
+	-@/bin/rm -f $(DL)/libpng.so.3.$(PNGVER)*
+	cp $(LIBNAME).so.$(PNGVER) $(DL)
+	cp libpng.so.3.$(PNGMIN) $(DL)
+	chmod 755 $(DL)/$(LIBNAME).so.$(PNGVER)
+	chmod 755 $(DL)/libpng.so.3.$(PNGMIN)
+	(cd $(DL); \
+	ln -f -s libpng.so.3.$(PNGMIN) libpng.so.3; \
+	ln -f -s libpng.so.3 libpng.so; \
+	ln -f -s $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ); \
+	ln -f -s $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so)
+	-@if [ ! -d $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/libpng12.pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/libpng12.pc
+	chmod 644 $(DL)/pkgconfig/libpng12.pc
+	(cd $(DL)/pkgconfig; ln -f -s libpng12.pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
+	-@/bin/rm -f $(DM)/man3/libpng.3
+	-@/bin/rm -f $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
+	-@/bin/rm -f $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/libpng12-config
+	cp libpng-config $(DB)/libpng12-config
+	chmod 755 $(DB)/libpng12-config
+	(cd $(DB); ln -sf libpng12-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	echo
+	echo Testing installed dynamic shared library.
+	$(CC) $(SUN_CC_FLAGS) -I$(ZLIBINC) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -o pngtesti `$(BINPATH)/libpng12-config --ldflags` \
+	   $(SUN_LD_FLAGS) -L$(ZLIBLIB) -R$(ZLIBLIB)
+	./pngtesti pngtest.png
+
+clean:
+	/bin/rm -f *.o libpng.a pngtest pngtesti pngout.png \
+	libpng-config $(LIBNAME).so $(LIBNAME).so.$(PNGMAJ)* \
+	libpng.so.3.$(PNGMIN) \
+	libpng.pc
+
+DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
+writelock:
+	chmod a-w *.[ch35] $(DOCS) scripts/*
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+png.o png.pic.o: png.h pngconf.h
+pngerror.o pngerror.pic.o: png.h pngconf.h
+pngrio.o pngrio.pic.o: png.h pngconf.h
+pngwio.o pngwio.pic.o: png.h pngconf.h
+pngmem.o pngmem.pic.o: png.h pngconf.h
+pngset.o pngset.pic.o: png.h pngconf.h
+pngget.o pngget.pic.o: png.h pngconf.h
+pngread.o pngread.pic.o: png.h pngconf.h
+pngrtran.o pngrtran.pic.o: png.h pngconf.h
+pngrutil.o pngrutil.pic.o: png.h pngconf.h
+pngtrans.o pngtrans.pic.o: png.h pngconf.h
+pngwrite.o pngwrite.pic.o: png.h pngconf.h
+pngwtran.o pngwtran.pic.o: png.h pngconf.h
+pngwutil.o pngwutil.pic.o: png.h pngconf.h
+pngpread.o pngpread.pic.o: png.h pngconf.h
+
+pngtest.o: png.h pngconf.h

scripts/makefile.64sunu

@@ -0,0 +1,224 @@
+# makefile for libpng on Solaris 2.x with cc
+# Contributed by William L. Sebok, based on makefile.linux
+# Copyright (C) 2002 Glenn Randers-Pehrson
+# Copyright (C) 1998 Greg Roelofs
+# Copyright (C) 1996, 1997 Andreas Dilger
+# For conditions of distribution and use, see copyright notice in png.h
+
+CC=cc
+SUN_CC_FLAGS=-fast -xtarget=ultra -xarch=v9
+SUN_LD_FLAGS=-fast -xtarget=ultra -xarch=v9
+
+# where make install puts libpng.a, libpng12.so and libpng12/png.h
+prefix=/a
+
+# Where the zlib library and include files are located
+# Changing these to ../zlib poses a security risk.  If you want
+# to have zlib in an adjacent directory, specify the full path instead of "..".
+#ZLIBLIB=../zlib
+#ZLIBINC=../zlib
+
+ZLIBLIB=/usr/lib
+ZLIBINC=/usr/include
+
+WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
+	-Wmissing-declarations -Wtraditional -Wcast-align \
+	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion
+CFLAGS=-I$(ZLIBINC) $(SUN_CC_FLAGS) \
+	# $(WARNMORE) -g -DPNG_DEBUG=5
+LDFLAGS=$(SUN_LD_FLAGS) -L$(ZLIBLIB) -R$(ZLIBLIB) libpng.a -lz -lm
+
+#RANLIB=ranlib
+RANLIB=echo
+
+LIBNAME=libpng12
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
+PNGVER = $(PNGMAJ).$(PNGMIN)
+
+INCPATH=$(prefix)/include
+LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
+
+OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
+	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
+	pngwtran.o pngmem.o pngerror.o pngpread.o
+
+OBJSDLL = $(OBJS:.o=.pic.o)
+
+.SUFFIXES:      .c .o .pic.o
+
+.c.pic.o:
+	$(CC) -c $(CFLAGS) -KPIC -o $@ $*.c
+
+all: libpng.a $(LIBNAME).so pngtest libpng.pc libpng-config
+
+libpng.a: $(OBJS)
+	ar rc $@ $(OBJS)
+	$(RANLIB) $@
+
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
+
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo libdir=\"$(LIBPATH)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo L_opts=\"-L$(LIBPATH)\"; \
+	echo R_opts=\"-R$(LIBPATH)\"; \
+	echo ccopts=\"-xtarget=ultra -xarch=v9\"; \
+	echo ldopts=\"-xtarget=ultra -xarch=v9\"; \
+	echo libs=\"-lpng12 -lz -lm\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
+
+$(LIBNAME).so: $(LIBNAME).so.$(PNGMAJ)
+	ln -f -s $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so
+
+$(LIBNAME).so.$(PNGMAJ): $(LIBNAME).so.$(PNGVER)
+	ln -f -s $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ)
+
+$(LIBNAME).so.$(PNGVER): $(OBJSDLL)
+	@case "`type ld`" in *ucb*) \
+	echo; \
+	echo '## WARNING:'; \
+	echo '## The commands "CC" and "LD" must NOT refer to /usr/ucb/cc'; \
+	echo '## and /usr/ucb/ld.  If they do, you need to adjust your PATH'; \
+	echo '## environment variable to put /usr/ccs/bin ahead of /usr/ucb.'; \
+	echo '## The environment variable LD_LIBRARY_PATH should not be set'; \
+	echo '## at all.  If it is, things are likely to break because of'; \
+	echo '## the libucb dependency that is created.'; \
+	echo; \
+	;; \
+	esac
+	$(LD) -G -L$(ZLIBLIB) -R$(ZLIBLIB) -h $(LIBNAME).so.$(PNGMAJ) \
+	 -o $(LIBNAME).so.$(PNGVER) $(OBJSDLL)
+
+libpng.so.3.$(PNGMIN): $(OBJSDLL)
+	$(LD) -G -L$(ZLIBLIB) -R$(ZLIBLIB) -h libpng.so.3 \
+	 -o libpng.so.3.$(PNGMIN)  $(OBJSDLL)
+
+pngtest: pngtest.o $(LIBNAME).so
+	$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
+
+test: pngtest
+	./pngtest
+
+install-headers: png.h pngconf.h
+	-@if [ ! -d $(DI) ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then mkdir $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h
+	-@/bin/rm $(DI)/libpng
+	(cd $(DI); ln -f -s $(LIBNAME) libpng; ln -f -s $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	chmod 644 $(DL)/$(LIBNAME).a
+	-@/bin/rm -f $(DL)/libpng.a
+	(cd $(DL); ln -f -s $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBNAME).so.$(PNGVER) libpng.pc \
+	libpng.so.3.$(PNGMIN)
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ).$(PNGVER)* $(DL)/$(LIBNAME).so
+	-@/bin/rm -f $(DL)/libpng.so
+	-@/bin/rm -f $(DL)/libpng.so.3
+	-@/bin/rm -f $(DL)/libpng.so.3.$(PNGVER)*
+	cp $(LIBNAME).so.$(PNGVER) $(DL)
+	cp libpng.so.3.$(PNGMIN) $(DL)
+	chmod 755 $(DL)/$(LIBNAME).so.$(PNGVER)
+	chmod 755 $(DL)/libpng.so.3.$(PNGMIN)
+	(cd $(DL); \
+	ln -f -s libpng.so.3.$(PNGMIN) libpng.so.3; \
+	ln -f -s libpng.so.3 libpng.so; \
+	ln -f -s $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ); \
+	ln -f -s $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so)
+	-@if [ ! -d $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; ln -f -s $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
+	-@/bin/rm -f $(DM)/man3/libpng.3
+	-@/bin/rm -f $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
+	-@/bin/rm -f $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	chmod 755 $(DB)/$(LIBNAME)-config
+	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	echo
+	echo Testing installed dynamic shared library.
+	$(CC) $(SUN_CC_FLAGS) -I$(ZLIBINC) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -o pngtesti `$(BINPATH)/libpng12-config --ldflags ` \
+	   $(SUN_LD_FLAGS) -L$(ZLIBLIB) -R$(ZLIBLIB)
+	./pngtesti pngtest.png
+
+clean:
+	/bin/rm -f *.o libpng.a pngtest pngtesti pngout.png \
+	libpng-config $(LIBNAME).so $(LIBNAME).so.$(PNGMAJ)* \
+	libpng.so.3.$(PNGMIN) \
+	libpng.pc
+
+DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
+writelock:
+	chmod a-w *.[ch35] $(DOCS) scripts/*
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+png.o png.pic.o: png.h pngconf.h
+pngerror.o pngerror.pic.o: png.h pngconf.h
+pngrio.o pngrio.pic.o: png.h pngconf.h
+pngwio.o pngwio.pic.o: png.h pngconf.h
+pngmem.o pngmem.pic.o: png.h pngconf.h
+pngset.o pngset.pic.o: png.h pngconf.h
+pngget.o pngget.pic.o: png.h pngconf.h
+pngread.o pngread.pic.o: png.h pngconf.h
+pngrtran.o pngrtran.pic.o: png.h pngconf.h
+pngrutil.o pngrutil.pic.o: png.h pngconf.h
+pngtrans.o pngtrans.pic.o: png.h pngconf.h
+pngwrite.o pngwrite.pic.o: png.h pngconf.h
+pngwtran.o pngwtran.pic.o: png.h pngconf.h
+pngwutil.o pngwutil.pic.o: png.h pngconf.h
+pngpread.o pngpread.pic.o: png.h pngconf.h
+
+pngtest.o: png.h pngconf.h

scripts/makefile.aix

@@ -1,7 +1,8 @@
 # makefile for libpng using gcc (generic, static library)
-# Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
+# Copyright (C) 2002 Glenn Randers-Pehrson
 # Copyright (C) 2000 Cosmin Truta
 # Copyright (C) 2000 Marc O. Gloor (AIX support added, from makefile.gcc)
+# Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
 # For conditions of distribution and use, see copyright notice in png.h
 
 # Location of the zlib library and include files
@@ -15,22 +16,35 @@ AR = ar rcs
 RANLIB = ranlib
 RM = rm -f
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
-# have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9beta3
+LIBNAME=libpng12
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local
 INCPATH=$(prefix)/include
 LIBPATH=$(prefix)/lib
 
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+
 CDEBUG = -g -DPNG_DEBUG=5
 LDDEBUG =
 CRELEASE = -O2
 LDRELEASE = -s
-CFLAGS = -I$(ZLIBINC) -Wall $(CRELEASE)
-LDFLAGS = -L. -L$(ZLIBLIB) -lpng -lz -lm $(LDRELEASE)
+WARNMORE=-Wall
+CFLAGS = -I$(ZLIBINC) $(WARNMORE) $(CRELEASE)
+LDFLAGS = -L. -L$(ZLIBLIB) -lpng12 -lz -lm $(LDRELEASE)
 
 # File extensions
 O=.o
@@ -43,27 +57,40 @@ OBJS = png$(O) pngerror$(O) pngget$(O) pngmem$(O) pngpread$(O) \
 	pngtrans$(O) pngwio$(O) pngwrite$(O) pngwtran$(O) pngwutil$(O)
 
 # Targets
-all: libpng$(A) pngtest$(E)
+all: $(LIBNAME)$(A) pngtest$(E)
 
-libpng$(A): $(OBJS)
+$(LIBNAME)$(A): $(OBJS)
 	$(AR) $@ $(OBJS)
 	$(RANLIB) $@
 
 test: pngtest$(E)
 	./pngtest$(E)
 
-pngtest$(E): pngtest$(O) libpng$(A)
+pngtest$(E): pngtest$(O) $(LIBNAME)$(A)
 	$(LD) -o $@ pngtest$(O) $(LDFLAGS)
 
-install: libpng.a
-	-@if [ ! -d $(INCPATH)  ]; then mkdir $(INCPATH); fi
-	-@if [ ! -d $(LIBPATH) ]; then mkdir $(LIBPATH); fi
-	cp png.h pngconf.h $(INCPATH)
-	chmod 644 $(INCPATH)/png.h $(INCPATH)/pngconf.h
-	cp libpng.a $(LIBPATH)
+install: $(LIBNAME)$(A)
+	-@if [ ! -d $(DI)  ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME)  ]; then mkdir $(DI)/$(LIBNAME); fi
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@rm -f $(DI)/$(LIBNAME)/png.h
+	-@rm -f $(DI)/$(LIBNAME)/pngconf.h
+	-@rm -f $(DI)/png.h
+	-@rm -f $(DI)/pngconf.h
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h \
+	$(DI)/$(LIBNAME)/pngconf.h
+	-@rm -rf $(DI)/libpng
+	(cd $(DI); ln -f -s $(LIBNAME) libpng; ln -f -s $(LIBNAME)/* .)
+	-@rm -f $(DL)/$(LIBNAME)$(A)
+	-@rm -f $(DL)/libpng$(A)
+	cp $(LIBNAME)$(A) $(DL)/$(LIBNAME)$(A)
+	chmod 644 $(DL)/$(LIBNAME)$(A)
+	(cd $(DL); ln -f -s $(LIBNAME)$(A) libpng$(A))
+	(cd $(DI); ln -f -s libpng/* .;)
 
 clean:
-	/bin/rm -f *.o libpng.a libpng.so* pngtest pngout.png
+	/bin/rm -f *.o $(LIBNAME)$(A) pngtest pngout.png
 
 png$(O): png.h pngconf.h
 pngerror$(O): png.h pngconf.h

scripts/makefile.atari

@@ -1,4 +1,5 @@
 # makefile for libpng
+# Copyright (C) 2002 Glenn Randers-Pehrson
 # Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
 # For conditions of distribution and use, see copyright notice in png.h
 # modified for LC56/ATARI assumes libz.lib is in same dir and uses default
@@ -10,6 +11,18 @@ LDFLAGS=-lpng -lz -lm
 
 # where make install puts libpng.a and png.h
 prefix=/usr/local
+INCPATH=$(prefix)/include
+LIBPATH=$(prefix)/lib
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
 
 OBJS = $(LBR)(png.o) $(LBR)(pngset.o) $(LBR)(pngget.o) $(LBR)(pngrutil.o)\
 	$(LBR)(pngtrans.o) $(LBR)(pngwutil.o)\
@@ -25,9 +38,14 @@ pngtest.ttp: pngtest.o $(LBR)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o$@ pngtest.o
 
 install: libpng.a
-	-@mkdir $(prefix)/include
-	-@mkdir $(prefix)/lib
-	cp png.h $(prefix)/include
-	cp pngconf.h $(prefix)/include
-	chmod 644 $(prefix)/include/png.h
-	chmod 644 $(prefix)/include/pngconf.h
+	-@mkdir $(DESTDIR)$(INCPATH)
+	-@mkdir $(DESTDIR)$(INCPATH)/libpng
+	-@mkdir $(DESTDIR)$(LIBPATH)
+	-@rm -f $(DESTDIR)$(INCPATH)/png.h
+	-@rm -f $(DESTDIR)$(INCPATH)/pngconf.h
+	cp png.h $(DESTDIR)$(INCPATH)/libpng
+	cp pngconf.h $(DESTDIR)$(INCPATH)/libpng
+	chmod 644 $(DESTDIR)$(INCPATH)/libpng/png.h
+	chmod 644 $(DESTDIR)$(INCPATH)/libpng/pngconf.h
+	(cd $(DESTDIR)$(INCPATH); ln -f -s $(LIBNAME) libpng; \
+	ln -f -s $(LIBNAME)/* .)

scripts/makefile.beos

@@ -1,5 +1,6 @@
 # makefile for libpng on BeOS x86 ELF with gcc
 # modified from makefile.linux by Sander Stoks
+# Copyright (C) 2002 Glenn Randers-Pehrson
 # Copyright (C) 1999 Greg Roelofs
 # Copyright (C) 1996, 1997 Andreas Dilger
 # For conditions of distribution and use, see copyright notice in png.h
@@ -10,6 +11,10 @@ CC=gcc
 ZLIBLIB=/usr/local/lib
 ZLIBINC=/usr/local/include
 
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
+PNGVER = $(PNGMAJ).$(PNGMIN)
+
 ALIGN=
 # For i386:
 # ALIGN=-malign-loops=2 -malign-functions=2
@@ -22,22 +27,33 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
 # still here in R4.5
 CFLAGS=-I$(ZLIBINC) -Wall -O1 -funroll-loops \
 	$(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5
-# LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng -lz -lm
-LDFLAGS=-L. -Wl,-soname=libpng.so.$(PNGMAJ) -L$(ZLIBLIB) -lz -lm
 
 RANLIB=ranlib
 #RANLIB=echo
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
-# have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9beta3
-PNGVER = $(PNGMAJ).$(PNGMIN)
-
-# where make install puts libpng.a, libpng.so*, and png.h
+# where make install puts libpng.a, libpng12.so*, and png.h
 prefix=/usr/local
 INCPATH=$(prefix)/include
 LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
+
+LIBNAME=libpng12
 
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
@@ -47,42 +63,119 @@ OBJSDLL = $(OBJS)
 
 .SUFFIXES:      .c .o
 
-all: libpng.a libpng.so pngtest
+all: libpng.a $(LIBNAME).so pngtest libpng.pc libpng-config
 
 libpng.a: $(OBJS)
 	ar rc $@ $(OBJS)
 	$(RANLIB) $@
 
-libpng.so: libpng.so.$(PNGMAJ)
-	ln -sf libpng.so.$(PNGMAJ) libpng.so
-	cp libpng.so* /boot/home/config/lib
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
 
-libpng.so.$(PNGMAJ): libpng.so.$(PNGVER)
-	ln -sf libpng.so.$(PNGVER) libpng.so.$(PNGMAJ)
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo libs=\"-lpng12 -lz -lm\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
 
-libpng.so.$(PNGVER): $(OBJSDLL)
-	$(CC) -L$(ZLIBLIB) -lz -nostart -Wl,-soname,libpng.so.$(PNGMAJ) -o
-libpng.so.$(PNGVER) \
-	 $(OBJSDLL)
+$(LIBNAME).so: $(LIBNAME).so.$(PNGMAJ)
+	ln -sf $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so
+	cp $(LIBNAME).so* /boot/home/config/lib
 
-pngtest: pngtest.o libpng.so
-	$(CC) -L$(ZLIBLIB) -lz -lpng -o pngtest pngtest.o
+$(LIBNAME).so.$(PNGMAJ): $(LIBNAME).so.$(PNGVER)
+	ln -sf $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ)
+
+$(LIBNAME).so.$(PNGVER): $(OBJSDLL)
+	$(CC) -nostart -Wl,-soname,$(LIBNAME).so.$(PNGMAJ) -o \
+	$(LIBNAME).so.$(PNGVER) $(OBJSDLL)
+
+libpng.so.3.$(PNGMIN): $(OBJSDLL)
+	$(CC) -nostart -Wl,-soname,libpng.so.3 -o \
+	libpng.so.3.$(PNGMIN) $(OBJSDLL)
+
+pngtest: pngtest.o $(LIBNAME).so
+	$(CC) -L$(ZLIBLIB) -lz -lpng12 -o pngtest pngtest.o
 
 test: pngtest
 	./pngtest
 
-install: libpng.a libpng.so.$(PNGVER)
-	-@mkdir $(INCPATH) $(LIBPATH)
-	cp png.h pngconf.h $(INCPATH)
-	chmod 644 $(INCPATH)/png.h $(INCPATH)/pngconf.h
-	cp libpng.a libpng.so.$(PNGVER) $(LIBPATH)
-	chmod 755 $(LIBPATH)/libpng.so.$(PNGVER)
-	-@/bin/rm -f $(LIBPATH)/libpng.so.$(PNGMAJ) $(LIBPATH)/libpng.so
-	(cd $(LIBPATH); ln -sf libpng.so.$(PNGVER) libpng.so.$(PNGMAJ); \
-	 ln -sf libpng.so.$(PNGMAJ) libpng.so)
+install-headers: png.h pngconf.h
+	-@if [ ! -d $(DI) ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then mkdir $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h
+	-@/bin/rm -f $(DI)/libpng
+	(cd $(DI); ln -sf $(LIBNAME) libpng; ln -sf $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	chmod 644 $(DL)/$(LIBNAME).a
+	-@/bin/rm -f $(DL)/libpng.a
+	(cd $(DL); ln -sf $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBNAME).so.$(PNGVER) libpng.pc \
+	libpng.so.3.$(PNGMIN)
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGVER)* $(DL)/$(LIBNAME).so
+	-@/bin/rm -f $(DL)/libpng.so
+	-@/bin/rm -f $(DL)/libpng.so.3
+	-@/bin/rm -f $(DL)/libpng.so.3.$(PNGMIN)*
+	cp $(LIBNAME).so.$(PNGVER) $(DL)
+	cp libpng.so.3.$(PNGMIN) $(DL)
+	chmod 755 $(DL)/$(LIBNAME).so.$(PNGVER)
+	chmod 755 $(DL)/libpng.so.3.$(PNGMIN)
+	(cd $(DL); \
+	ln -sf libpng.so.3.$(PNGMIN) libpng.so.3; \
+	ln -sf libpng.so.3 libpng.so; \
+	ln -sf $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ); \
+	ln -sf $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so)
+	-@if [ ! -d $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
+	-@/bin/rm -f $(DM)/man3/libpng.3
+	-@/bin/rm -f $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
+	-@/bin/rm -f $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	chmod 755 $(DB)/$(LIBNAME)-config
+	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	$(CC) $(CFLAGS) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) \
+	   -o pngtesti `$(BINPATH)/libpng12-config --ldflags`
+	./pngtesti pngtest.png
 
 clean:
-	/bin/rm -f *.o libpng.a libpng.so* pngtest pngout.png
+	/bin/rm -f *.o libpng.a pngtest pngout.png libpng-config \
+	$(LIBNAME).so $(LIBNAME).so.$(PNGMAJ)* pngtesti \
+	libpng.so.3.$(PNGMIN) \
+	libpng.pc
 
 # DO NOT DELETE THIS LINE -- make depend depends on it.
 

scripts/makefile.cygwin

@@ -1,24 +1,55 @@
 # makefile for cygwin on x86
-#   builds both dll (with import lib) and static lib versions
+#   Builds both dll (with import lib) and static lib versions
 #   of the library, and builds two copies of pngtest: one
 #   statically linked and one dynamically linked.
 #
+# Copyright (C) 2002 Soren Anderson, Charles Wilson, and Glenn Randers-Pehrson
 #   based on makefile for linux-elf w/mmx by:
 # Copyright (C) 1998-2000 Greg Roelofs
 # Copyright (C) 1996, 1997 Andreas Dilger
 # For conditions of distribution and use, see copyright notice in png.h
 
+# This makefile intends to support building outside the src directory
+# if desired. When invoking it, specify an argument to SRCDIR on the
+# command line that points to the top of the directory where your source
+# is located.
+
+ifdef SRCDIR
+VPATH = $(SRCDIR)
+else
+SRCDIR = .
+endif
+
+# Override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+
+DESTDIR=
+
 # To enable assembler optimizations, add '-DPNG_USE_PNGGCCRD' to
-# $CFLAGS, and include pnggccrd.o in $OBJS, below.
+# $CFLAGS, and include pnggccrd.o in $OBJS, below, and in the dependency
+# list at the bottom of this makefile.
 
 CC=gcc
+ifdef MINGW
+MINGW_CCFLAGS=-mno-cygwin -I/usr/include/mingw
+MINGW_LDFLAGS=-mno-cygwin -L/usr/lib/mingw
+endif
 
-# where "make install" puts libpng.a, libpng.so*, png.h and pngconf.h
+# Where "make install" puts libpng*.a, *png*.dll, png.h, and pngconf.h
+ifndef prefix
 prefix=/usr
+$(warning You haven't specified a 'prefix=' location. Defaulting to "/usr")
+endif
 
 # Where the zlib library and include files are located
-ZLIBLIB=${prefix}/lib
-ZLIBINC=${prefix}/include
+ZLIBLIB= /usr/lib
+ZLIBINC=
 #ZLIBLIB=../zlib
 #ZLIBINC=../zlib
 
@@ -30,37 +61,56 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
 	-Wmissing-declarations -Wtraditional -Wcast-align \
 	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion
 
-#CFLAGS=-DPNG_USE_PNGGCCRD -I$(ZLIBINC) -Wall -O3 $(ALIGN) -funroll-loops \
-#        -fomit-frame-pointer  # $(WARNMORE) -g -DPNG_DEBUG=5
-CFLAGS=-I$(ZLIBINC) -Wall -O3 $(ALIGN) -funroll-loops \
-	-fomit-frame-pointer
+### if you use the asm, add pnggccrd.o to the OBJS list
+###
+### if you don't need thread safety, but want the asm accel
+#CFLAGS= $(strip $(MINGW_CCFLAGS) -DPNG_THREAD_UNSAFE_OK -DPNG_USE_PNGGCCRD \
+#	$(addprefix -I,$(ZLIBINC)) -Wall -O3 $(ALIGN) -funroll-loops \
+#	-fomit-frame-pointer)  # $(WARNMORE) -g -DPNG_DEBUG=5
+### if you need thread safety and want (minimal) asm accel
+#CFLAGS= $(strip $(MINGW_CCFLAGS) -DPNG_USE_PNGGCCRD $(addprefix -I,$(ZLIBINC)) \
+#	-Wall -O3 $(ALIGN) -funroll-loops \
+#	-fomit-frame-pointer)  # $(WARNMORE) -g -DPNG_DEBUG=5
+### Normal (non-asm) compilation
+CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
+        -Wall -O3 $(ALIGN) -funroll-loops \
+	-fomit-frame-pointer) # $(WARNMORE) -g -DPNG_DEBUG=5
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
-# have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9beta3
+LIBNAME = libpng12
+PNGMAJ = 0
+CYGDLL = 12
+PNGMIN = 1.2.6beta1
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
-SHAREDLIB=cygpng$(PNGMAJ).dll
+SHAREDLIB=cygpng$(CYGDLL).dll
 STATLIB=libpng.a
 IMPLIB=libpng.dll.a
 SHAREDDEF=libpng.def
 LIBS=$(SHAREDLIB) $(STATLIB)
 EXE=.exe
 
-LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz
-LDSHARED=gcc -shared -Wl,--enable-auto-image-base
-LDEXTRA=-Wl,--out-implib=$(IMPLIB) $(SHAREDDEF)
+LDFLAGS=$(strip -L. $(MINGW_LDFLAGS) -lpng $(addprefix -L,$(ZLIBLIB)) -lz)
+LDSFLAGS=$(strip -shared -L.  $(MINGW_LDFLAGS) -Wl,--export-all)
+LDEXTRA=-Wl,--out-implib=$(IMPLIB) $(addprefix -L,$(ZLIBLIB)) -lz
 
+MKDIR=/bin/mkdir -pv
 RANLIB=ranlib
 #RANLIB=echo
 
 INCPATH=$(prefix)/include
 LIBPATH=$(prefix)/lib
+
 BINPATH=$(prefix)/bin
 MANPATH=$(prefix)/man
 MAN3PATH=$(MANPATH)/man3
-DOCPATH=$(prefix)/doc/libpng-$(PNGMIN)
+MAN5PATH=$(MANPATH)/man5
+
+# cosmetic: shortened strings:
+S =$(SRCDIR)
+D =$(DESTDIR)
+DB =$(D)$(BINPATH)
+DI =$(D)$(INCPATH)
+DL =$(D)$(LIBPATH)
 
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
@@ -68,47 +118,70 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 
 OBJSDLL = $(OBJS:.o=.pic.o)
 
-.SUFFIXES:      .c .o .pic.o
+.SUFFIXES: .c .o .pic.o
 
 %.o : %.c
-	$(CC) -c $(CFLAGS) -DPNG_STATIC -DZLIB_STATIC -o $@ $<
-
+	$(CC) -c $(CFLAGS) -o $@ $<
+%.pic.o : CFLAGS += -DPNG_BUILD_DLL
 %.pic.o : %.c
-	$(CC) -c $(CFLAGS) -DPNG_BUILD_DLL -o $@ $<
+	$(CC) -c $(CFLAGS) -o $@ $<
 
-all: all-static all-shared
+all: all-static all-shared libpng.pc libpng-config libpng.pc libpng-config
+
+# Make this to verify that "make [...] install" will do what you want.
+buildsetup-tell:
+	@echo  VPATH is set to: \"$(VPATH)\"
+	@echo  prefix is set to: \"$(prefix)\"
+	@echo -e INCPATH,LIBPATH, etc. are set to:'\n' \
+ $(addprefix $(D),$(INCPATH)'\n' $(LIBPATH)'\n' $(BINPATH)'\n' \
+   $(MANPATH)'\n' $(MAN3PATH)'\n' $(MAN5PATH)'\n')'\n'
+
+libpng.pc: scripts/libpng.pc.in
+	@echo -e Making pkg-config file for this libpng installation..'\n' \
+           using PREFIX=\"$(prefix)\"'\n'
+	cat $(S)/scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! | \
+	   sed -e s/-lm// > libpng.pc
+
+libpng-config: scripts/libpng-config-head.in scripts/libpng-config-body.in
+	@echo -e Making $(LIBNAME) libpng-config file for this libpng \
+ installation..'\n' using PREFIX=\"$(prefix)\"'\n'
+	( cat $(S)/scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo L_opts=\"-L$(LIBPATH)\"; \
+	echo libs=\"-lpng$(CYGDLL) -lz\"; \
+	cat $(S)/scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
 
 static: all-static
-
 shared: all-shared
-
 all-static: $(STATLIB) pngtest-stat$(EXE)
-
 all-shared: $(SHAREDLIB) pngtest$(EXE)
 
-pnggccrd.o:	png.h pngconf.h pngasmrd.h
+pnggccrd.o: pnggccrd.c png.h pngconf.h
 	@echo ""
-	@echo '    You can ignore the single "control reaches end of non-void function"'
-	@echo '    warning and multiple "<variable> defined but not used" warnings:'
+	@echo '    You can ignore the "control reaches end of non-void function"'
+	@echo '    warning and "<variable> defined but not used" warnings:'
 	@echo ""
-	$(CC) -c $(CFLAGS) -DPNG_STATIC -DZLIB_STATIC -o $@ $*.c
+	$(CC) -c $(CFLAGS) -o $@ $<
 
-pnggccrd.pic.o:	png.h pngconf.h pngasmrd.h
+pnggccrd.pic.o:	pnggccrd.c png.h pngconf.h
 	@echo ""
-	@echo '    You can ignore the single "control reaches end of non-void function"'
-	@echo '    warning and multiple "<variable> defined but not used" warnings:'
+	@echo '    You can ignore the "control reaches end of non-void function"'
+	@echo '    warning and "<variable> defined but not used" warnings:'
 	@echo ""
-	$(CC) -c $(CFLAGS) -DPNG_BUILD_DLL -o $@ pnggccrd.c
+	$(CC) -c $(CFLAGS) -DPNG_BUILD_DLL -o $@ $<
 
 $(STATLIB): $(OBJS)
 	ar rc $@ $(OBJS)
 	$(RANLIB) $@
 
-$(SHAREDDEF): msvc/png32ms.def
-	cat $< | sed -e '1{G;s/^\(.*\)\(\n\)/EXPORTS/;};2,/^EXPORTS/d' > $@
+$(SHAREDDEF): projects/msvc/png32ms.def
+	cat $< | sed -e '1{G;s/^\(.*\)\(\n\)/EXPORTS/;};2,/^EXPORTS/d' | \
+	sed -e 's/\([^;]*\);/;/' > $@
 
 $(SHAREDLIB): $(OBJSDLL) $(SHAREDDEF)
-	$(LDSHARED) -o $@ $(LDEXTRA) $(OBJSDLL) -L. -L$(ZLIBLIB) -lz
+	$(CC) $(LDSFLAGS) -o $@ $(OBJSDLL) -L. $(LDEXTRA)
 
 pngtest$(EXE): pngtest.pic.o $(SHAREDLIB)
 	$(CC) $(CFLAGS) $< $(LDFLAGS) -o $@
@@ -120,51 +193,96 @@ pngtest.pic.o: pngtest.c
 	$(CC) $(CFLAGS) -c $< -o $@
 
 pngtest.o: pngtest.c
-	$(CC) $(CFLAGS) -DPNG_STATIC -DZLIB_STATIC -c $< -o $@
+	$(CC) $(CFLAGS) -c $< -o $@
 
 test: test-static test-shared
 
 test-static: pngtest-stat$(EXE)
-	./pngtest-stat
+	./pngtest-stat $(S)/pngtest.png
 
 test-shared: pngtest$(EXE)
-	./pngtest
+	./pngtest $(S)/pngtest.png
 
-install: install-static install-shared
+install-static: $(STATLIB) install-headers install-man
+	-@if [ ! -d $(DL) ]; then $(MKDIR) $(DL); fi
+	install -m 644 $(STATLIB) $(DL)/$(LIBNAME).a
+	-@rm -f $(DL)/$(STATLIB)
+	(cd $(DL); ln -sf $(LIBNAME).a $(STATLIB))
 
-install-static: $(STATLIB) install-headers install-docs install-man
-	-@if [ ! -d $(LIBPATH) ]; then mkdir -p $(LIBPATH); fi
-	install -m 755 $(STATLIB) $(LIBPATH)
-
-install-shared: $(SHAREDLIB) install-headers install-docs install-man
-	-@if [ ! -d $(LIBPATH) ]; then mkdir -p $(LIBPATH); fi
-	-@if [ ! -d $(BINPATH) ]; then mkdir -p $(BINPATH); fi
-	install -m 755 $(IMPLIB) $(LIBPATH)
-	install -s -m 755 $(SHAREDLIB) $(BINPATH)
+install-shared: $(SHAREDLIB) libpng.pc libpng-config install-headers install-man
+	-@if [ ! -d $(DL) ]; then $(MKDIR) $(DL); fi
+	-@if [ ! -d $(DB) ]; then $(MKDIR) $(DB); fi
+	-@if [ ! -d $(DL)/pkgconfig ]; then $(MKDIR) $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	install -m 644 $(IMPLIB) $(DL)/$(LIBNAME).dll.a
+	-@rm -f $(DL)/$(IMPLIB)
+	(cd $(DL); ln -sf $(LIBNAME).dll.a $(IMPLIB))
+	install -s -m 755 $(SHAREDLIB) $(DB)
+	install -m 644 libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc)
 
 install-headers:
-	-@if [ ! -d $(INCPATH)  ]; then mkdir -p $(INCPATH); fi
-	install -m 644 png.h pngconf.h $(INCPATH)
-
-install-docs:
-	-@if [ ! -d $(DOCPATH) ]; then mkdir -p $(DOCPATH); fi
-	install -m 644 $(DOCS) $(DOCPATH)
+	-@if [ ! -d $(DI) ]; then $(MKDIR) $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR) $(DI)/$(LIBNAME); fi
+	-@rm -f $(DI)/png.h
+	-@rm -f $(DI)/pngconf.h
+	install -m 644 $(S)/png.h $(S)/pngconf.h $(DI)/$(LIBNAME)
+	-@rm -f $(DI)/libpng
+	(cd $(DI); ln -sf $(LIBNAME) libpng; ln -sf $(LIBNAME)/* .)
 
 install-man:
-	-@if [ ! -d $(MAN3PATH) ]; then mkdir -p $(MAN3PATH); fi
-	install -m 644 libpngpf.3 libpng.3 $(MAN3PATH)
+	-@if [ ! -d $(D)$(MAN3PATH) ]; then $(MKDIR) $(D)$(MAN3PATH); fi
+	-@if [ ! -d $(D)$(MAN5PATH) ]; then $(MKDIR) $(D)$(MAN5PATH); fi
+	install -m 644 $(S)/libpngpf.3 $(S)/libpng.3 $(D)$(MAN3PATH)
+	install -m 644 $(S)/png.5 $(D)$(MAN5PATH)
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	chmod 755 $(DB)/$(LIBNAME)-config
+	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)
+
+# Run this to verify that a future `configure' run will pick up the settings
+# you want.
+test-config-install: SHELL=/bin/bash
+test-config-install: $(DB)/libpng-config
+	@echo -e Testing libpng-config functions...'\n'
+	@ for TYRA in LDFLAGS CPPFLAGS CFLAGS LIBS VERSION; \
+   do \
+    printf "(%d)\t %10s =%s\n" $$(($$gytiu + 1)) $$TYRA \
+    "$$($(DB)/libpng-config `echo --$$TYRA |tr '[:upper:]' '[:lower:]'`)"; \
+    gytiu=$$(( $$gytiu + 1 )); \
+   done
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	$(CC) $(CFLAGS) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -L$(ZLIBLIB) \
+	   -o pngtesti$(EXE) `$(BINPATH)/libpng12-config --ldflags`
+	./pngtesti$(EXE) pngtest.png
 
 clean:
 	/bin/rm -f *.pic.o *.o $(STATLIB) $(IMPLIB) $(SHAREDLIB) \
-	pngtest-stat$(EXE) pngtest$(EXE) pngout.png $(SHAREDDEF)
+	pngtest-stat$(EXE) pngtest$(EXE) pngout.png $(SHAREDDEF) \
+	libpng-config libpng.pc pngtesti$(EXE)
 
 DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
 writelock:
 	chmod a-w *.[ch35] $(DOCS) scripts/*
 
+.PHONY: buildsetup-tell libpng.pc libpng-config test-config-install clean
+
 # DO NOT DELETE THIS LINE -- make depend depends on it.
 
-png.o png.pic.o:		png.h pngconf.h png.c pngasmrd.h
+png.o png.pic.o:		png.h pngconf.h png.c
 pngerror.o pngerror.pic.o:	png.h pngconf.h pngerror.c
 pngrio.o pngrio.pic.o:		png.h pngconf.h pngrio.c
 pngwio.o pngwio.pic.o:		png.h pngconf.h pngwio.c
@@ -173,7 +291,7 @@ pngset.o pngset.pic.o:		png.h pngconf.h pngset.c
 pngget.o pngget.pic.o:		png.h pngconf.h pngget.c
 pngread.o pngread.pic.o:	png.h pngconf.h pngread.c
 pngrtran.o pngrtran.pic.o:	png.h pngconf.h pngrtran.c
-pngrutil.o pngrutil.pic.o:	png.h pngconf.h pngrutil.c pngasmrd.h
+pngrutil.o pngrutil.pic.o:	png.h pngconf.h pngrutil.c
 pngtrans.o pngtrans.pic.o:	png.h pngconf.h pngtrans.c
 pngwrite.o pngwrite.pic.o:	png.h pngconf.h pngwrite.c
 pngwtran.o pngwtran.pic.o:	png.h pngconf.h pngwtran.c
@@ -182,3 +300,6 @@ pngpread.o pngpread.pic.o:	png.h pngconf.h pngpread.c
 
 pngtest.o:			png.h pngconf.h pngtest.c
 pngtest-stat.o:			png.h pngconf.h pngtest.c
+
+
+

scripts/makefile.darwin

@@ -0,0 +1,205 @@
+# makefile for libpng on Darwin / Mac OS X
+# Copyright (C) 2002 Glenn Randers-Pehrson
+# Copyright (C) 2001 Christoph Pfisterer
+# derived from makefile.linux:
+#  Copyright (C) 1998, 1999 Greg Roelofs
+#  Copyright (C) 1996, 1997 Andreas Dilger
+# For conditions of distribution and use, see copyright notice in png.h
+
+# where "make install" puts libpng.a, libpng12.dylib, png.h and pngconf.h
+prefix=/usr/local
+
+# Where the zlib library and include files are located
+#ZLIBLIB=/usr/local/lib
+#ZLIBINC=/usr/local/include
+ZLIBLIB=../zlib
+ZLIBINC=../zlib
+
+CC=cc
+CFLAGS=-I$(ZLIBINC) -Wall -O3 -funroll-loops
+LDFLAGS=-L. -L$(ZLIBLIB) -lpng12 -lz
+
+#RANLIB=echo
+RANLIB=ranlib
+
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
+PNGVER = $(PNGMAJ).$(PNGMIN)
+LIBNAME = libpng12
+
+INCPATH=$(prefix)/include
+LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
+
+OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
+	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
+	pngwtran.o pngmem.o pngerror.o pngpread.o
+
+OBJSDLL = $(OBJS:.o=.pic.o)
+
+.SUFFIXES:      .c .o .pic.o
+
+.c.pic.o:
+	$(CC) -c $(CFLAGS) -fno-common -o $@ $*.c
+
+all: libpng.a $(LIBNAME).dylib pngtest libpng.pc libpng-config
+
+libpng.a: $(OBJS)
+	ar rc $@ $(OBJS)
+	$(RANLIB) $@
+
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! | \
+	   sed -e s/-lm// > libpng.pc
+
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo L_opts=\"-L$(LIBPATH)\"; \
+	echo libs=\"-lpng12 -lz\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
+
+$(LIBNAME).dylib: $(LIBNAME).$(PNGMAJ).dylib
+	ln -sf $(LIBNAME).$(PNGMAJ).dylib $(LIBNAME).dylib
+
+$(LIBNAME).$(PNGMAJ).dylib: $(LIBNAME).$(PNGVER).dylib
+	ln -sf $(LIBNAME).$(PNGVER).dylib $(LIBNAME).$(PNGMAJ).dylib
+
+$(LIBNAME).$(PNGVER).dylib: $(OBJSDLL)
+	$(CC) -dynamiclib \
+	 -install_name $(DL)/$(LIBNAME).$(PNGMAJ).dylib \
+	 -flat_namespace -undefined suppress \
+	 -o $(LIBNAME).$(PNGVER).dylib \
+	 $(OBJSDLL)
+
+libpng.3.$(PNGMIN).dylib: $(OBJSDLL)
+	$(CC) -dynamiclib \
+	 -install_name $(DL)/libpng.3.dylib \
+	 -current_version 3 -compatibility_version 3 \
+	 -flat_namespace -undefined suppress \
+	 -o libpng.3.$(PNGMIN).dylib \
+	 $(OBJSDLL)
+
+pngtest: pngtest.o $(LIBNAME).dylib
+	$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
+
+test: pngtest
+	./pngtest
+
+install-headers: png.h pngconf.h
+	-@if [ ! -d $(DI) ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then mkdir $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h
+	-@/bin/rm -f $(DI)/libpng
+	(cd $(DI); ln -sf $(LIBNAME) libpng; ln -sf $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	chmod 644 $(DL)/$(LIBNAME).a
+	-@/bin/rm -f $(DL)/libpng.a
+	(cd $(DL); ln -sf $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBNAME).dylib libpng.pc \
+	libpng.3.$(PNGMIN).dylib
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@/bin/rm -f $(DL)/$(LIBNAME).$(PNGVER)*.dylib
+	-@/bin/rm -f $(DL)/$(LIBNAME).dylib
+	-@/bin/rm -f $(DL)/libpng.dylib
+	-@/bin/rm -f $(DL)/libpng.3.dylib
+	-@/bin/rm -f $(DL)/libpng.3.$(PNGMIN)*.dylib
+	cp $(LIBNAME).$(PNGVER).dylib $(DL)
+	cp libpng.3.$(PNGMIN).dylib $(DL)
+	chmod 755 $(DL)/$(LIBNAME).$(PNGVER).dylib
+	chmod 755 $(DL)/libpng.3.$(PNGMIN).dylib
+	(cd $(DL); \
+	ln -sf libpng.3.$(PNGMIN).dylib libpng.3.dylib; \
+	ln -sf libpng.3.dylib libpng.dylib; \
+	ln -sf $(LIBNAME).$(PNGVER).dylib $(LIBNAME).$(PNGMAJ).dylib; \
+	ln -sf $(LIBNAME).$(PNGMAJ).dylib $(LIBNAME).dylib)
+	-@if [ ! -d $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
+	-@/bin/rm -f $(DM)/man3/libpng.3
+	-@/bin/rm -f $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
+	-@/bin/rm -f $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	chmod 755 $(DB)/$(LIBNAME)-config
+	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	$(CC) $(CFLAGS) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -L$(ZLIBLIB) \
+	   -o pngtesti `$(BINPATH)/libpng12-config --ldflags`
+	./pngtesti pngtest.png
+
+clean:
+	rm -f *.o libpng.a pngtest pngout.png libpng-config \
+	libpng.3.$(PNGMIN).dylib \
+	libpng.pc $(LIBNAME).*dylib pngtesti
+
+DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
+writelock:
+	chmod a-w *.[ch35] $(DOCS) scripts/*
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+png.o png.pic.o: png.h pngconf.h
+pngerror.o pngerror.pic.o: png.h pngconf.h
+pngrio.o pngrio.pic.o: png.h pngconf.h
+pngwio.o pngwio.pic.o: png.h pngconf.h
+pngmem.o pngmem.pic.o: png.h pngconf.h
+pngset.o pngset.pic.o: png.h pngconf.h
+pngget.o pngget.pic.o: png.h pngconf.h
+pngread.o pngread.pic.o: png.h pngconf.h
+pngrtran.o pngrtran.pic.o: png.h pngconf.h
+pngrutil.o pngrutil.pic.o: png.h pngconf.h
+pngtrans.o pngtrans.pic.o: png.h pngconf.h
+pngwrite.o pngwrite.pic.o: png.h pngconf.h
+pngwtran.o pngwtran.pic.o: png.h pngconf.h
+pngwutil.o pngwutil.pic.o: png.h pngconf.h
+pngpread.o pngpread.pic.o: png.h pngconf.h
+
+pngtest.o: png.h pngconf.h

scripts/makefile.dec

@@ -1,5 +1,5 @@
 # makefile for libpng on DEC Alpha Unix
-# Copyright (C) 2000 Glenn Randers-Pehrson
+# Copyright (C) 2000-2002 Glenn Randers-Pehrson
 # Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
 # For conditions of distribution and use, see copyright notice in png.h
 
@@ -7,6 +7,23 @@
 prefix=/usr/local
 INCPATH=$(prefix)/include
 LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
 
 # Where the zlib library and include files are located
 #ZLIBLIB=/usr/local/lib
@@ -14,15 +31,14 @@ LIBPATH=$(prefix)/lib
 ZLIBLIB=../zlib
 ZLIBINC=../zlib
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
-# have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9beta3
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
 PNGVER = $(PNGMAJ).$(PNGMIN)
+LIBNAME = libpng12
 
 CC=cc
 CFLAGS=-std -w1 -I$(ZLIBINC) -O # -g -DPNG_DEBUG=1
-LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
+LDFLAGS=-L$(ZLIBLIB) -rpath $(ZLIBLIB) libpng.a -lz -lm
 
 #RANLIB=echo
 RANLIB=ranlib
@@ -31,20 +47,38 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
 
-all: libpng.so libpng.a pngtest
+all: $(LIBNAME).so libpng.a pngtest libpng.pc libpng-config
 
 libpng.a: $(OBJS)
 	ar rc $@  $(OBJS)
 	$(RANLIB) $@
 
-libpng.so: libpng.so.$(PNGMAJ)
-	ln -f -s libpng.so.$(PNGMAJ) libpng.so
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
 
-libpng.so.$(PNGMAJ): libpng.so.$(PNGVER)
-	ln -f -s libpng.so.$(PNGVER) libpng.so.$(PNGMAJ)
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo ccopts=\"-std\"; \
+	echo L_opts=\"-L$(LIBPATH)\"; \
+	echo libs=\"-lpng12 -lz -lm\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
 
-libpng.so.$(PNGVER): $(OBJS)
-	$(CC) -shared -o $@ $(OBJS) -L$(ZLIBLIB) -lz -lm
+$(LIBNAME).so: $(LIBNAME).so.$(PNGMAJ)
+	ln -f -s $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so
+
+$(LIBNAME).so.$(PNGMAJ): $(LIBNAME).so.$(PNGVER)
+	ln -f -s $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ)
+
+$(LIBNAME).so.$(PNGVER): $(OBJS)
+	$(CC) -shared -o $@ $(OBJS) -L$(ZLIBLIB) \
+	-soname $(LIBNAME).so.$(PNGMAJ)
+
+libpng.so.3.$(PNGMIN): $(OBJS)
+	$(CC) -shared -o $@ $(OBJS) -L$(ZLIBLIB) \
+	-soname libpng.so.3
 
 pngtest: pngtest.o libpng.a
 	$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
@@ -52,23 +86,83 @@ pngtest: pngtest.o libpng.a
 test: pngtest
 	./pngtest
 
-install: libpng.a libpng.so.$(PNGVER)
-	-@mkdir $(INCPATH)
-	-@mkdir $(LIBPATH)
-	cp png.h $(INCPATH)
-	cp pngconf.h $(INCPATH)
-	chmod 644 $(INCPATH)/png.h
-	chmod 644 $(INCPATH)/pngconf.h
-	cp libpng.a $(LIBPATH)
-	cp libpng.so.$(PNGVER) $(LIBPATH)
-	chmod 644 $(LIBPATH)/libpng.a
-	chmod 644 $(LIBPATH)/libpng.so.$(PNGVER)
-	-@/bin/rm -f $(LIBPATH)/libpng.so.$(PNGMAJ) $(LIBPATH)/libpng.so
-	(cd $(LIBPATH)); ln -f -s libpng.so.$(PNGVER) libpng.so.$(PNGMAJ); \
-	 ln -f -s libpng.so.$(PNGMAJ) libpng.so)
+install-headers: png.h pngconf.h
+	-@if [ ! -d $(DI) ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then mkdir $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h
+	-@/bin/rm -f $(DI)/libpng
+	(cd $(DI); ln -sf $(LIBNAME) libpng; ln -sf $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	chmod 644 $(DL)/$(LIBNAME).a
+	-@/bin/rm -f $(DL)/libpng.a
+	(cd $(DL); ln -sf $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBNAME).so.$(PNGVER) libpng.pc \
+	libpng.so.3.$(PNGMIN)
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGVER)* $(DL)/$(LIBNAME).so
+	-@/bin/rm -f $(DL)/libpng.so
+	-@/bin/rm -f $(DL)/libpng.so.3
+	-@/bin/rm -f $(DL)/libpng.so.3.$(PNGMIN)*
+	cp $(LIBNAME).so.$(PNGVER) $(DL)
+	cp libpng.so.3.$(PNGMIN) $(DL)
+	chmod 755 $(DL)/$(LIBNAME).so.$(PNGVER)
+	chmod 755 $(DL)/libpng.so.3.$(PNGMIN)
+	(cd $(DL); \
+	ln -f -s libpng.so.3.$(PNGMIN) libpng.so.3; \
+	ln -f -s libpng.so.3 libpng.so; \
+	ln -sf $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ); \
+	ln -sf $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so)
+	-@if [ ! -d $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
+	-@/bin/rm -f $(DM)/man3/libpng.3
+	-@/bin/rm -f $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
+	-@/bin/rm -f $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	chmod 755 $(DB)/$(LIBNAME)-config
+	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	echo
+	echo Testing installed dynamic shared library.
+	$(CC) -w1 -I$(ZLIBINC) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -L$(ZLIBLIB) -R$(ZLIBLIB) \
+	   -o pngtesti `$(BINPATH)/libpng12-config --ldflags`
+	./pngtesti pngtest.png
 
 clean:
-	rm -f *.o libpng.a pngtest pngout.png libpng.so*
+	/bin/rm -f *.o libpng.a pngtest pngtesti pngout.png \
+	libpng-config $(LIBNAME).so $(LIBNAME).so.$(PNGMAJ)* \
+	libpng.so.3.$(PNGMIN) \
+	libpng.pc
 
 # DO NOT DELETE THIS LINE -- make depend depends on it.
 

scripts/makefile.dj2

@@ -1,10 +1,13 @@
 # DJGPP (DOS gcc) makefile for libpng
+# Copyright (C) 2002 Glenn Randers-Pehrson
 # Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
 # For conditions of distribution and use, see copyright notice in png.h
 
-# where make install puts libpng.a and png.h
+# where make install will put libpng.a and png.h
 #prefix=/usr/local
 prefix=.
+INCPATH=$(prefix)/include
+LIBPATH=$(prefix)/lib
 
 CC=gcc
 CFLAGS=-I../zlib -O

scripts/makefile.freebsd

@@ -0,0 +1,48 @@
+# makefile for libpng under FreeBSD
+# Copyright (C) 2002 Glenn Randers-Pehrson and Andrey A. Chernov
+# For conditions of distribution and use, see copyright notice in png.h
+
+PREFIX?=        /usr/local
+SHLIB_VER?=     5
+
+LIB=		png
+SHLIB_MAJOR=	${SHLIB_VER}
+SHLIB_MINOR=	0
+NOPROFILE=	YES
+NOOBJ=          YES
+
+# where make install puts libpng.a and png.h
+DESTDIR=	${PREFIX}
+LIBDIR=		/lib
+INCS=		png.h pngconf.h
+INCSDIR=	/include/libpng
+INCDIR=		${INCSDIR}		# for 4.x bsd.lib.mk
+MAN=		libpng.3 libpngpf.3 png.5
+MANDIR=		/man/man
+SYMLINKS=       libpng/png.h ${INCSDIR}/../png.h \
+		libpng/pngconf.h ${INCSDIR}/../pngconf.h
+LDADD+=         -lm -lz
+DPADD+=         ${LIBM} ${LIBZ}
+
+CFLAGS+= -I. -DPNG_USE_PNGGCCRD
+.if (${MACHINE_ARCH} != "i386")
+CFLAGS+= -DPNG_NO_ASSEMBLER_CODE
+.endif
+
+SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
+	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
+	pngwtran.c pngmem.c pngerror.c pngpread.c pnggccrd.c
+
+pngtest: pngtest.o libpng.a
+	${CC} ${CFLAGS} -L. -static -o pngtest pngtest.o -lpng -lz -lm
+
+CLEANFILES= pngtest pngtest.o pngout.png
+
+test: pngtest
+	./pngtest
+
+DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
+writelock:
+	chmod a-w *.[ch35] $(DOCS) scripts/*
+
+.include <bsd.lib.mk>

scripts/makefile.gcmmx

@@ -1,16 +1,31 @@
-# makefile for libpng on Linux ELF with gcc using MMX assembler code
+# makefile for libpng.a and libpng12.so on Linux ELF with gcc using MMX
+# assembler code
+# Copyright 2002 Greg Roelofs and Glenn Randers-Pehrson
+# Copyright 1998-2001 Greg Roelofs
 # Copyright 1996-1997 Andreas Dilger
-# Copyright 1998-2000 Greg Roelofs
 # For conditions of distribution and use, see copyright notice in png.h
 
 # CAUTION: Do not use this makefile with gcc versions 2.7.2.2 and earlier.
 
+# WARNING: The assembler code in pnggccrd.c may not be thread safe.
+
+# NOTE:  When testing MMX performance on a multitasking system, make sure
+#        there are no floating-point programs (e.g., SETI@Home) running in
+#        the background!  Context switches between MMX and FPU are expensive.
+
+LIBNAME = libpng12
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
+PNGVER = $(PNGMAJ).$(PNGMIN)
+
 CC=gcc
 
-# where "make install" puts libpng.a, libpng.so*, png.h and pngconf.h
+# where "make install" puts libpng12.a, libpng12.so*,
+# libpng12/png.h and libpng12/pngconf.h
+# Prefix must be a full pathname.
 prefix=/usr/local
 
-# Where the zlib library and include files are located
+# Where the zlib library and include files are located.
 #ZLIBLIB=/usr/local/lib
 #ZLIBINC=/usr/local/include
 ZLIBLIB=../zlib
@@ -26,22 +41,45 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
 
 # for pgcc version 2.95.1, -O3 is buggy; don't use it.
 
-CFLAGS=-DPNG_USE_PNGGCCRD -I$(ZLIBINC) -Wall -O3 $(ALIGN) -funroll-loops \
+# Remove -DPNG_THREAD_UNSAFE_OK if you need thread safety
+### for generic gcc:
+CFLAGS=-DPNG_THREAD_UNSAFE_OK -DPNG_USE_PNGGCCRD -I$(ZLIBINC) -Wall \
+	-O3 $(ALIGN) -funroll-loops \
 	-fomit-frame-pointer  # $(WARNMORE) -g -DPNG_DEBUG=5
-LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng -lz -lm
+### for gcc 2.95.2 on 686:
+#CFLAGS=-DPNG_THREAD_UNSAFE_OK -DPNG_USE_PNGGCCRD -I$(ZLIBINC) -Wall -O3 \
+#	-mcpu=i686 -malign-double -ffast-math -fstrict-aliasing \
+#	$(ALIGN) -funroll-loops -funroll-all-loops -fomit-frame-pointer 
+### for gcc 2.7.2.3 on 486 and up:
+#CFLAGS=-DPNG_THREAD_UNSAFE_OK -DPNG_USE_PNGGCCRD -I$(ZLIBINC) -Wall -O3 \
+#	-m486 -malign-double -ffast-math \
+#	$(ALIGN) -funroll-loops -funroll-all-loops -fomit-frame-pointer 
+
+LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng12 -lz -lm
 LDFLAGS_A=-L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) libpng.a -lz -lm
 
 RANLIB=ranlib
 #RANLIB=echo
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
-# have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9beta3
-PNGVER = $(PNGMAJ).$(PNGMIN)
-
 INCPATH=$(prefix)/include
 LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
 
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
@@ -54,37 +92,49 @@ OBJSDLL = $(OBJS:.o=.pic.o)
 .c.pic.o:
 	$(CC) -c $(CFLAGS) -fPIC -o $@ $*.c
 
-all: libpng.a libpng.so pngtest pngtest-static
-
-pnggccrd.o:	pnggccrd.c png.h pngconf.h pngasmrd.h
-	@echo ""
-	@echo '    You can ignore the single "control reaches end of non-void function"'
-	@echo '    warning and multiple "<variable> defined but not used" warnings:'
-	@echo ""
-	$(CC) -c $(CFLAGS) -o $@ $*.c
-
-pnggccrd.pic.o:	pnggccrd.c png.h pngconf.h pngasmrd.h
-	@echo ""
-	@echo '    You can ignore the single "control reaches end of non-void function"'
-	@echo '    warning and multiple "<variable> defined but not used" warnings:'
-	@echo ""
-	$(CC) -c $(CFLAGS) -fPIC -o $@ pnggccrd.c
+all: libpng.a $(LIBNAME).so pngtest pngtest-static libpng.pc libpng-config
 
 libpng.a: $(OBJS)
 	ar rc $@ $(OBJS)
 	$(RANLIB) $@
 
-libpng.so: libpng.so.$(PNGMAJ)
-	ln -sf libpng.so.$(PNGMAJ) libpng.so
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
 
-libpng.so.$(PNGMAJ): libpng.so.$(PNGVER)
-	ln -sf libpng.so.$(PNGVER) libpng.so.$(PNGMAJ)
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo cppflags=\"-DPNG_THREAD_UNSAFE_OK -DPNG_USE_PNGGCCRD\"; \
+	echo L_opts=\"-L$(LIBPATH)\"; \
+	echo R_opts=\"-Wl,-rpath,$(LIBPATH)\"; \
+	echo libs=\"-lpng12 -lz -lm\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
 
-libpng.so.$(PNGVER): $(OBJSDLL)
-	$(CC) -shared -Wl,-soname,libpng.so.$(PNGMAJ) -o libpng.so.$(PNGVER) \
-	 $(OBJSDLL) -L$(ZLIBLIB) -lz -lm -lc
+pnggccrd.o:	pnggccrd.c png.h pngconf.h
+	$(CC) -c $(CFLAGS) -o $@ $*.c
 
-pngtest: pngtest.o libpng.so
+pnggccrd.pic.o:	pnggccrd.c png.h pngconf.h
+	$(CC) -c $(CFLAGS) -fPIC -o $@ pnggccrd.c
+
+$(LIBNAME).so: $(LIBNAME).so.$(PNGMAJ)
+	ln -sf $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so
+
+$(LIBNAME).so.$(PNGMAJ): $(LIBNAME).so.$(PNGVER)
+	ln -sf $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ)
+
+$(LIBNAME).so.$(PNGVER): $(OBJSDLL)
+	$(CC) -shared -Wl,-soname,$(LIBNAME).so.$(PNGMAJ) \
+	-o $(LIBNAME).so.$(PNGVER) \
+	$(OBJSDLL)
+
+libpng.so.3.$(PNGMIN): $(OBJSDLL)
+	$(CC) -shared -Wl,-soname,libpng.so.3 \
+	-o libpng.so.3.$(PNGMIN) \
+	$(OBJSDLL)
+
+pngtest: pngtest.o $(LIBNAME).so
 	$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
 
 pngtest-static: pngtest.o libpng.a
@@ -92,33 +142,95 @@ pngtest-static: pngtest.o libpng.a
 
 test: pngtest pngtest-static
 	@echo ""
-	@echo "   Testing dynamically linked version:"
+	@echo "   Running pngtest dynamically linked with $(LIBNAME).so:"
 	@echo ""
 	./pngtest
 	@echo ""
-	@echo "   Testing statically linked version:"
+	@echo "   Running pngtest statically linked with libpng.a:"
 	@echo ""
 	./pngtest-static
 
-install: libpng.a libpng.so.$(PNGVER)
-	-@if [ ! -d $(INCPATH)  ]; then mkdir $(INCPATH); fi
-	-@if [ ! -d $(LIBPATH) ]; then mkdir $(LIBPATH); fi
-	cp png.h pngconf.h $(INCPATH)
-	chmod 644 $(INCPATH)/png.h $(INCPATH)/pngconf.h
-	cp libpng.a libpng.so.$(PNGVER) $(LIBPATH)
-	chmod 755 $(LIBPATH)/libpng.so.$(PNGVER)
-	-@/bin/rm -f $(LIBPATH)/libpng.so.$(PNGMAJ) $(LIBPATH)/libpng.so
-	(cd $(LIBPATH); ln -sf libpng.so.$(PNGVER) libpng.so.$(PNGMAJ); \
-	 ln -sf libpng.so.$(PNGMAJ) libpng.so)
+install-headers: png.h pngconf.h
+	-@if [ ! -d $(DI) ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then mkdir $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h
+	-@/bin/rm -f $(DI)/libpng
+	(cd $(DI); ln -sf $(LIBNAME) libpng; ln -sf $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	chmod 644 $(DL)/$(LIBNAME).a
+	-@/bin/rm -f $(DL)/libpng.a
+	(cd $(DL); ln -sf $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBNAME).so.$(PNGVER) libpng.pc \
+	libpng.so.3.$(PNGMIN)
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGVER)* $(DL)/$(LIBNAME).so
+	-@/bin/rm -f $(DL)/libpng.so
+	-@/bin/rm -f $(DL)/libpng.so.3
+	-@/bin/rm -f $(DL)/libpng.so.3.$(PNGMIN)*
+	cp $(LIBNAME).so.$(PNGVER) $(DL)
+	cp libpng.so.3.$(PNGMIN) $(DL)
+	chmod 755 $(DL)/$(LIBNAME).so.$(PNGVER)
+	chmod 755 $(DL)/libpng.so.3.$(PNGMIN)
+	(cd $(DL); \
+	ln -sf libpng.so.3.$(PNGMIN) libpng.so.3; \
+	ln -sf libpng.so.3 libpng.so; \
+	ln -sf $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ); \
+	ln -sf $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so)
+	-@if [ ! -d $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
+	-@/bin/rm -f $(DM)/man3/libpng.3
+	-@/bin/rm -f $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
+	-@/bin/rm -f $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	chmod 755 $(DB)/$(LIBNAME)-config
+	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	$(CC) -I$(ZLIBINC) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) \
+	   -o pngtesti `$(BINPATH)/libpng12-config --ldflags`
+	./pngtesti pngtest.png
 
 clean:
-	/bin/rm -f *.o libpng.a libpng.so* pngtest pngout.png
+	/bin/rm -f *.o libpng.a pngtest pngout.png libpng-config \
+	$(LIBNAME).so $(LIBNAME).so.$(PNGMAJ)* pngtest-static pngtesti \
+	libpng.so.3.$(PNGMIN) \
+	libpng.pc
 
 DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
 writelock:
 	chmod a-w *.[ch35] $(DOCS) scripts/*
 
-png.o png.pic.o:		png.h pngconf.h png.c pngasmrd.h
+png.o png.pic.o:		png.h pngconf.h png.c
 pngerror.o pngerror.pic.o:	png.h pngconf.h pngerror.c
 pngrio.o pngrio.pic.o:		png.h pngconf.h pngrio.c
 pngwio.o pngwio.pic.o:		png.h pngconf.h pngwio.c
@@ -127,7 +239,7 @@ pngset.o pngset.pic.o:		png.h pngconf.h pngset.c
 pngget.o pngget.pic.o:		png.h pngconf.h pngget.c
 pngread.o pngread.pic.o:	png.h pngconf.h pngread.c
 pngrtran.o pngrtran.pic.o:	png.h pngconf.h pngrtran.c
-pngrutil.o pngrutil.pic.o:	png.h pngconf.h pngrutil.c pngasmrd.h
+pngrutil.o pngrutil.pic.o:	png.h pngconf.h pngrutil.c
 pngtrans.o pngtrans.pic.o:	png.h pngconf.h pngtrans.c
 pngwrite.o pngwrite.pic.o:	png.h pngconf.h pngwrite.c
 pngwtran.o pngwtran.pic.o:	png.h pngconf.h pngwtran.c

scripts/makefile.hpgcc

@@ -0,0 +1,217 @@
+# makefile for libpng on HP-UX using GCC with the HP ANSI/C linker.
+# Copyright (C) 2002, Glenn Randers-Pehrson
+# Copyright (C) 2001, Laurent faillie
+# Copyright (C) 1998, 1999 Greg Roelofs
+# Copyright (C) 1996, 1997 Andreas Dilger
+# For conditions of distribution and use, see copyright notice in png.h
+
+CC=gcc
+LD=ld
+
+# where "make install" puts libpng.a, libpng.sl*, png.h and pngconf.h
+prefix=/usr/local
+
+# Where the zlib library and include files are located
+ZLIBLIB=/opt/zlib/lib
+ZLIBINC=/opt/zlib/include
+
+# Note that if you plan to build a libpng shared library, zlib must also
+# be a shared library, which zlib's configure does not do.  After running
+# zlib's configure, edit the appropriate lines of makefile to read:
+#   CFLAGS=-O1 -DHAVE_UNISTD -DUSE_MAP -fPIC \
+#   LDSHARED=ld -b
+#   SHAREDLIB=libz.sl
+
+ALIGN=
+# for i386:
+#ALIGN=-malign-loops=2 -malign-functions=2
+
+WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
+	-Wmissing-declarations -Wtraditional -Wcast-align \
+	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion
+
+# for pgcc version 2.95.1, -O3 is buggy; don't use it.
+
+CFLAGS=-I$(ZLIBINC) -Wall -O3 -funroll-loops \
+	$(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5
+#LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng12 -lz -lm
+LDFLAGS=-L$(ZLIBLIB) libpng.a -lz -lm
+
+RANLIB=ranlib
+#RANLIB=echo
+
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
+PNGVER = $(PNGMAJ).$(PNGMIN)
+LIBNAME = libpng12
+
+INCPATH=$(prefix)/include
+LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
+
+OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
+	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
+	pngwtran.o pngmem.o pngerror.o pngpread.o
+
+OBJSDLL = $(OBJS:.o=.pic.o)
+
+.SUFFIXES:      .c .o .pic.o
+
+.c.pic.o:
+	$(CC) -c $(CFLAGS) -fPIC -o $@ $*.c
+
+all: libpng.a $(LIBNAME).sl pngtest libpng.pc libpng-config
+
+libpng.a: $(OBJS)
+	ar rc $@ $(OBJS)
+	$(RANLIB) $@
+
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
+
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo libs=\"-lpng12 -lz -lm\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
+
+$(LIBNAME).sl: $(LIBNAME).sl.$(PNGMAJ)
+	ln -sf $(LIBNAME).sl.$(PNGMAJ) $(LIBNAME).sl
+
+$(LIBNAME).sl.$(PNGMAJ): $(LIBNAME).sl.$(PNGVER)
+	ln -sf $(LIBNAME).sl.$(PNGVER) $(LIBNAME).sl.$(PNGMAJ)
+
+$(LIBNAME).sl.$(PNGVER): $(OBJSDLL)
+	$(LD) -b +s \
+	+h $(LIBNAME).sl.$(PNGMAJ) -o $(LIBNAME).sl.$(PNGVER) $(OBJSDLL)
+
+libpng.sl.3.$(PNGMIN): $(OBJSDLL)
+	$(LD) -b +s \
+	+h libpng.sl.3 -o libpng.sl.3.$(PNGMIN) $(OBJSDLL)
+
+pngtest: pngtest.o $(LIBNAME).sl
+	$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
+
+test: pngtest
+	./pngtest
+
+
+install-headers: png.h pngconf.h
+	-@if [ ! -d $(DI) ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then mkdir $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h
+	-@/bin/rm -f $(DI)/libpng
+	(cd $(DI); ln -sf $(LIBNAME) libpng; ln -sf $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	chmod 644 $(DL)/$(LIBNAME).a
+	-@/bin/rm -f $(DL)/libpng.a
+	(cd $(DL); ln -sf $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBNAME).sl.$(PNGVER) libpng.pc \
+	libpng.sl.3.$(PNGMIN)
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@/bin/rm -f $(DL)/$(LIBNAME).sl.$(PNGVER)* $(DL)/$(LIBNAME).sl
+	-@/bin/rm -f $(DL)/libpng.sl
+	-@/bin/rm -f $(DL)/libpng.sl.3
+	-@/bin/rm -f $(DL)/libpng.sl.3.$(PNGMIN)*
+	cp $(LIBNAME).sl.$(PNGVER) $(DL)
+	cp libpng.sl.3.$(PNGMIN) $(DL)
+	chmod 755 $(DL)/$(LIBNAME).sl.$(PNGVER)
+	chmod 755 $(DL)/libpng.sl.3.$(PNGMIN)
+	(cd $(DL); \
+	ln -sf libpng.sl.3.$(PNGMIN) libpng.sl.3; \
+	ln -sf libpng.sl.3 libpng.sl; \
+	ln -sf $(LIBNAME).sl.$(PNGVER) $(LIBNAME).sl.$(PNGMAJ); \
+	ln -sf $(LIBNAME).sl.$(PNGMAJ) $(LIBNAME).sl)
+	-@if [ ! -d $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
+	-@/bin/rm -f $(DM)/man3/libpng.3
+	-@/bin/rm -f $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
+	-@/bin/rm -f $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	chmod 755 $(DB)/$(LIBNAME)-config
+	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	echo
+	echo Testing installed dynamic shared library.
+	$(CC) -I$(ZLIBINC) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) \
+	   -o pngtesti `$(BINPATH)/libpng12-config --ldflags`
+	./pngtesti pngtest.png
+
+clean:
+	/bin/rm -f *.o libpng.a pngtest pngtesti pngout.png \
+	libpng-config $(LIBNAME).sl $(LIBNAME).sl.$(PNGMAJ)* \
+	libpng.sl.3.$(PNGMIN) \
+	libpng.pc
+
+DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
+writelock:
+	chmod a-w *.[ch35] $(DOCS) scripts/*
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+png.o png.pic.o: png.h pngconf.h
+pngerror.o pngerror.pic.o: png.h pngconf.h
+pngrio.o pngrio.pic.o: png.h pngconf.h
+pngwio.o pngwio.pic.o: png.h pngconf.h
+pngmem.o pngmem.pic.o: png.h pngconf.h
+pngset.o pngset.pic.o: png.h pngconf.h
+pngget.o pngget.pic.o: png.h pngconf.h
+pngread.o pngread.pic.o: png.h pngconf.h
+pngrtran.o pngrtran.pic.o: png.h pngconf.h
+pngrutil.o pngrutil.pic.o: png.h pngconf.h
+pngtrans.o pngtrans.pic.o: png.h pngconf.h
+pngwrite.o pngwrite.pic.o: png.h pngconf.h
+pngwtran.o pngwtran.pic.o: png.h pngconf.h
+pngwutil.o pngwutil.pic.o: png.h pngconf.h
+pngpread.o pngpread.pic.o: png.h pngconf.h
+
+pngtest.o: png.h pngconf.h

scripts/makefile.hpux

@@ -1,5 +1,5 @@
-# makefile for libpng, HPUX (10.20 and 11.00)
-# Copyright (C) 1999, 2000 Glenn Randers-Pehrson
+# makefile for libpng, HPUX (10.20 and 11.00) using the ANSI/C product.
+# Copyright (C) 1999-2002 Glenn Randers-Pehrson
 # Copyright (C) 1995 Guy Eric Schalnat, Group 42
 # contributed by Jim Rice and updated by Chris Schleicher, Hewlett Packard
 # For conditions of distribution and use, see copyright notice in png.h
@@ -8,21 +8,47 @@
 ZLIBLIB=/opt/zlib/lib
 ZLIBINC=/opt/zlib/include
 
+# Note that if you plan to build a libpng shared library, zlib must also
+# be a shared library, which zlib's configure does not do.  After running
+# zlib's configure, edit the appropriate lines of makefile to read:
+#   CFLAGS=-O1 -DHAVE_UNISTD -DUSE_MAP -fPIC \
+#   LDSHARED=ld -b
+#   SHAREDLIB=libz.sl
+
 CC=cc
 CFLAGS=-I$(ZLIBINC) -O -Ae +DA1.1 +DS2.0
+# Caution: be sure you have built zlib with the same CFLAGS.
 CCFLAGS=-I$(ZLIBINC) -O -Ae +DA1.1 +DS2.0
-LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
+LDFLAGS=-L$(ZLIBLIB) libpng.a -lz -lm
 
 RANLIB=ranlib
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
-# have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9beta3
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
 PNGVER = $(PNGMAJ).$(PNGMIN)
+LIBNAME = libpng12
 
-# where make install puts libpng.a and png.h
+# where make install puts libpng.a, libpng12.sl, and png.h
 prefix=/opt/libpng
+INCPATH=$(prefix)/include
+LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
 
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
@@ -35,21 +61,38 @@ OBJSDLL = $(OBJS:.o=.pic.o)
 .c.pic.o:
 	$(CC) -c $(CFLAGS) +z -o $@ $*.c
 
-all: libpng.a libpng.sl pngtest
+all: libpng.a $(LIBNAME).sl pngtest libpng.pc libpng-config
 
 libpng.a: $(OBJS)
-	ar rc $@  $(OBJS)
+	ar rc $@ $(OBJS)
 	$(RANLIB) $@
 
-libpng.sl: libpng.sl.$(PNGMAJ)
-	ln -f -s libpng.sl.$(PNGMAJ) libpng.sl
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
 
-libpng.sl.$(PNGMAJ): libpng.sl.$(PNGVER)
-	ln -f -s libpng.sl.$(PNGVER) libpng.sl.$(PNGMAJ)
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo ccopts=\"-Ae +DA1.1 +DS2.0\"; \
+	echo L_opts=\"-L$(LIBPATH)\"; \
+	echo libs=\"-lpng12 -lz -lm\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
 
-libpng.sl.$(PNGVER): $(OBJSDLL)
-	$(LD) -b -L$(ZLIBLIB) +s +b $(ZLIBLIB) \
-	+h libpng.sl.$(PNGMAJ) -o libpng.sl.$(PNGVER) $(OBJSDLL) -lz
+$(LIBNAME).sl: $(LIBNAME).sl.$(PNGMAJ)
+	ln -sf $(LIBNAME).sl.$(PNGMAJ) $(LIBNAME).sl
+
+$(LIBNAME).sl.$(PNGMAJ): $(LIBNAME).sl.$(PNGVER)
+	ln -sf $(LIBNAME).sl.$(PNGVER) $(LIBNAME).sl.$(PNGMAJ)
+
+$(LIBNAME).sl.$(PNGVER): $(OBJSDLL)
+	$(LD) -b +s \
+	+h $(LIBNAME).sl.$(PNGMAJ) -o $(LIBNAME).sl.$(PNGVER) $(OBJSDLL)
+
+libpng.sl.3.$(PNGMIN): $(OBJSDLL)
+	$(LD) -b +s \
+	+h libpng.sl.3 -o libpng.sl.3.$(PNGMIN) $(OBJSDLL)
 
 pngtest: pngtest.o libpng.a
 	$(CC) -o pngtest $(CCFLAGS) pngtest.o $(LDFLAGS)
@@ -57,21 +100,83 @@ pngtest: pngtest.o libpng.a
 test: pngtest
 	./pngtest
 
-install: libpng.a
-	-@mkdir $(prefix)/include
-	-@mkdir $(prefix)/lib
-	cp png.h $(prefix)/include
-	cp pngconf.h $(prefix)/include
-	chmod 644 $(prefix)/include/png.h
-	chmod 644 $(prefix)/include/pngconf.h
-	cp libpng.a libpng.sl.$(PNGVER) $(prefix)/lib
-	chmod 644 $(prefix)/lib/libpng.a
-	chmod 755 $(prefix)/lib/libpng.sl.$(PNGVER)
-	(cd $(prefix)/lib; ln -f -s libpng.sl.$(PNGVER) libpng.sl.$(PNGMAJ); \
-	ln -f -s libpng.sl.$(PNGMAJ) libpng.sl)
+install-headers: png.h pngconf.h
+	-@if [ ! -d $(DI) ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then mkdir $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h
+	-@/bin/rm -f $(DI)/libpng
+	(cd $(DI); ln -sf $(LIBNAME) libpng; ln -sf $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	chmod 644 $(DL)/$(LIBNAME).a
+	-@/bin/rm -f $(DL)/libpng.a
+	(cd $(DL); ln -sf $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBNAME).sl.$(PNGVER) libpng.pc \
+	libpng.sl.3.$(PNGMIN)
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@/bin/rm -f $(DL)/$(LIBNAME).sl.$(PNGVER)* $(DL)/$(LIBNAME).sl
+	-@/bin/rm -f $(DL)/libpng.sl
+	-@/bin/rm -f $(DL)/libpng.sl.3
+	-@/bin/rm -f $(DL)/libpng.sl.3.$(PNGMIN)*
+	cp $(LIBNAME).sl.$(PNGVER) $(DL)
+	cp libpng.sl.3.$(PNGMIN) $(DL)
+	chmod 755 $(DL)/$(LIBNAME).sl.$(PNGVER)
+	chmod 755 $(DL)/libpng.sl.3.$(PNGMIN)
+	(cd $(DL); \
+	ln -sf libpng.sl.3.$(PNGMIN) libpng.sl.3; \
+	ln -sf libpng.sl.3 libpng.sl; \
+	ln -sf $(LIBNAME).sl.$(PNGVER) $(LIBNAME).sl.$(PNGMAJ); \
+	ln -sf $(LIBNAME).sl.$(PNGMAJ) $(LIBNAME).sl)
+	-@if [ ! -d $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
+	-@/bin/rm -f $(DM)/man3/libpng.3
+	-@/bin/rm -f $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
+	-@/bin/rm -f $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	chmod 755 $(DB)/$(LIBNAME)-config
+	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	echo
+	echo Testing installed dynamic shared library.
+	$(CC) $(CCFLAGS) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -L$(ZLIBLIB) \
+	   -o pngtesti `$(BINPATH)/libpng12-config --ldflags`
+	./pngtesti pngtest.png
 
 clean:
-	rm -f *.o libpng.a libpng.sl* pngtest pngout.png
+	/bin/rm -f *.o libpng.a pngtest pngtesti pngout.png \
+	libpng-config $(LIBNAME).sl $(LIBNAME).sl.$(PNGMAJ)* \
+	libpng.sl.3.$(PNGMIN) \
+	libpng.pc
 
 DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
 writelock:

scripts/makefile.ibmc

@@ -5,7 +5,7 @@
 # Notes:
 #   Derived from makefile.std
 #   All modules are compiled in C mode
-#   Tested with IBM C 3.6.5 under Win32, expected to work under OS/2 too
+#   Tested under Win32, expected to work under OS/2
 #   Can be easily adapted for IBM VisualAge/C++ for AIX
 
 # Location of the zlib library and include files
@@ -18,7 +18,7 @@ LD = ilink
 AR = ilib
 RM = del
 
-CFLAGS = -I$(ZLIBINC) -O2 -W3
+CFLAGS = -I$(ZLIBINC) -Mc -O2 -W3
 LDFLAGS =
 
 # File extensions

scripts/makefile.intel

@@ -70,7 +70,7 @@ pngrtran$(O): png.h pngconf.h
 pngrutil$(O): png.h pngconf.h
 	$(CC) $(CFLAGS) $*.c $(ERRFILE)
 
-pngvcrd$(O): png.h pngconf.h pngasmrd.h
+pngvcrd$(O): png.h pngconf.h
 	$(CC) $(CFLAGS) $*.c $(ERRFILE)
 
 pngerror$(O): png.h pngconf.h

scripts/makefile.knr

@@ -1,4 +1,5 @@
 # makefile for libpng
+# Copyright (C) 2002 Glenn Randers-Pehrson
 # Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
 # For conditions of distribution and use, see copyright notice in png.h
 
@@ -9,6 +10,18 @@
 
 # where make install puts libpng.a and png.h
 prefix=/usr/local
+INCPATH=$(prefix)/include
+LIBPATH=$(prefix)/lib
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
 
 CC=cc
 CFLAGS=-I../zlib -O
@@ -46,14 +59,18 @@ test: pngtest
 	./pngtest
 
 install: libpng.a
-	-@mkdir $(prefix)/include
-	-@mkdir $(prefix)/lib
-	cp png.h $(prefix)/include
-	cp pngconf.h $(prefix)/include
-	chmod 644 $(prefix)/include/png.h
-	chmod 644 $(prefix)/include/pngconf.h
-	cp libpng.a $(prefix)/lib
-	chmod 644 $(prefix)/lib/libpng.a
+	-@mkdir $(DESTDIR)$(INCPATH)
+	-@mkdir $(DESTDIR)$(INCPATH)/libpng
+	-@mkdir $(DESTDIR)$(LIBPATH)
+	-@rm -f $(DESTDIR)$(INCPATH)/png.h
+	-@rm -f $(DESTDIR)$(INCPATH)/pngconf.h
+	cp png.h $(DESTDIR)$(INCPATH)/libpng
+	cp pngconf.h $(DESTDIR)$(INCPATH)/libpng
+	chmod 644 $(DESTDIR)$(INCPATH)/libpng/png.h
+	chmod 644 $(DESTDIR)$(INCPATH)/libpng/pngconf.h
+	(cd $(DESTDIR)$(INCPATH); ln -f -s libpng/* .)
+	cp libpng.a $(DESTDIR)$(LIBPATH)
+	chmod 644 $(DESTDIR)$(LIBPATH)/libpng.a
 
 clean:
 	rm -f *.o libpng.a pngtest pngout.png ansi2knr

scripts/makefile.linux

@@ -1,14 +1,21 @@
-# makefile for libpng on Linux ELF with gcc
-# Copyright (C) 1998, 1999 Greg Roelofs
+# makefile for libpng.a and libpng12.so on Linux ELF with gcc
+# Copyright (C) 1998, 1999, 2002 Greg Roelofs and Glenn Randers-Pehrson
 # Copyright (C) 1996, 1997 Andreas Dilger
 # For conditions of distribution and use, see copyright notice in png.h
 
+LIBNAME = libpng12
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
+PNGVER = $(PNGMAJ).$(PNGMIN)
+
 CC=gcc
 
-# where "make install" puts libpng.a, libpng.so*, png.h and pngconf.h
+# where "make install" puts libpng12.a, libpng12.so*,
+# libpng12/png.h and libpng12/pngconf.h
+# Prefix must be a full pathname.
 prefix=/usr/local
 
-# Where the zlib library and include files are located
+# Where the zlib library and include files are located.
 #ZLIBLIB=/usr/local/lib
 #ZLIBINC=/usr/local/include
 ZLIBLIB=../zlib
@@ -26,19 +33,32 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
 
 CFLAGS=-I$(ZLIBINC) -Wall -O3 -funroll-loops \
 	$(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5
-LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng -lz -lm
+
+LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng12 -lz -lm
+LDFLAGS_A=-L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) libpng.a -lz -lm
 
 RANLIB=ranlib
 #RANLIB=echo
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
-# have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9beta3
-PNGVER = $(PNGMAJ).$(PNGMIN)
-
 INCPATH=$(prefix)/include
 LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
 
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
@@ -51,41 +71,132 @@ OBJSDLL = $(OBJS:.o=.pic.o)
 .c.pic.o:
 	$(CC) -c $(CFLAGS) -fPIC -o $@ $*.c
 
-all: libpng.a libpng.so pngtest
+all: libpng.a $(LIBNAME).so pngtest pngtest-static libpng.pc libpng-config
 
 libpng.a: $(OBJS)
 	ar rc $@ $(OBJS)
 	$(RANLIB) $@
 
-libpng.so: libpng.so.$(PNGMAJ)
-	ln -sf libpng.so.$(PNGMAJ) libpng.so
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
 
-libpng.so.$(PNGMAJ): libpng.so.$(PNGVER)
-	ln -sf libpng.so.$(PNGVER) libpng.so.$(PNGMAJ)
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo L_opts=\"-L$(LIBPATH)\"; \
+	echo R_opts=\"-Wl,-rpath,$(LIBPATH)\"; \
+	echo libs=\"-lpng12 -lz -lm\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
 
-libpng.so.$(PNGVER): $(OBJSDLL)
-	$(CC) -shared -Wl,-soname,libpng.so.$(PNGMAJ) -o libpng.so.$(PNGVER) \
-	 $(OBJSDLL) -L$(ZLIBLIB) -lz -lm -lc
+$(LIBNAME).so: $(LIBNAME).so.$(PNGMAJ)
+	ln -sf $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so
 
-pngtest: pngtest.o libpng.so
+$(LIBNAME).so.$(PNGMAJ): $(LIBNAME).so.$(PNGVER)
+	ln -sf $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ)
+
+$(LIBNAME).so.$(PNGVER): $(OBJSDLL)
+	$(CC) -shared -Wl,-soname,$(LIBNAME).so.$(PNGMAJ) \
+	-o $(LIBNAME).so.$(PNGVER) \
+	$(OBJSDLL)
+
+libpng.so.3.$(PNGMIN): $(OBJSDLL)
+	$(CC) -shared -Wl,-soname,libpng.so.3 \
+	-o libpng.so.3.$(PNGMIN) \
+	$(OBJSDLL)
+
+pngtest: pngtest.o $(LIBNAME).so
 	$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
 
-test: pngtest
-	./pngtest
+pngtest-static: pngtest.o libpng.a
+	$(CC) -o pngtest-static $(CFLAGS) pngtest.o $(LDFLAGS_A)
 
-install: libpng.a libpng.so.$(PNGVER)
-	-@if [ ! -d $(INCPATH)  ]; then mkdir $(INCPATH); fi
-	-@if [ ! -d $(LIBPATH) ]; then mkdir $(LIBPATH); fi
-	cp png.h pngconf.h $(INCPATH)
-	chmod 644 $(INCPATH)/png.h $(INCPATH)/pngconf.h
-	cp libpng.a libpng.so.$(PNGVER) $(LIBPATH)
-	chmod 755 $(LIBPATH)/libpng.so.$(PNGVER)
-	-@/bin/rm -f $(LIBPATH)/libpng.so.$(PNGMAJ) $(LIBPATH)/libpng.so
-	(cd $(LIBPATH); ln -sf libpng.so.$(PNGVER) libpng.so.$(PNGMAJ); \
-	 ln -sf libpng.so.$(PNGMAJ) libpng.so)
+test: pngtest pngtest-static
+	@echo ""
+	@echo "   Running pngtest dynamically linked with $(LIBNAME).so:"
+	@echo ""
+	./pngtest
+	@echo ""
+	@echo "   Running pngtest statically linked with libpng.a:"
+	@echo ""
+	./pngtest-static
+
+install-headers: png.h pngconf.h
+	-@if [ ! -d $(DI) ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then mkdir $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h
+	-@/bin/rm -f $(DI)/libpng
+	(cd $(DI); ln -sf $(LIBNAME) libpng; ln -sf $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	chmod 644 $(DL)/$(LIBNAME).a
+	-@/bin/rm -f $(DL)/libpng.a
+	(cd $(DL); ln -sf $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBNAME).so.$(PNGVER) libpng.pc \
+	libpng.so.3.$(PNGMIN)
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGVER)* $(DL)/$(LIBNAME).so
+	-@/bin/rm -f $(DL)/libpng.so
+	-@/bin/rm -f $(DL)/libpng.so.3
+	-@/bin/rm -f $(DL)/libpng.so.3.$(PNGMIN)*
+	cp $(LIBNAME).so.$(PNGVER) $(DL)
+	cp libpng.so.3.$(PNGMIN) $(DL)
+	chmod 755 $(DL)/$(LIBNAME).so.$(PNGVER)
+	chmod 755 $(DL)/libpng.so.3.$(PNGMIN)
+	(cd $(DL); \
+	ln -sf libpng.so.3.$(PNGMIN) libpng.so.3; \
+	ln -sf libpng.so.3 libpng.so; \
+	ln -sf $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ); \
+	ln -sf $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so)
+	-@if [ ! -d $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
+	-@/bin/rm -f $(DM)/man3/libpng.3
+	-@/bin/rm -f $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
+	-@/bin/rm -f $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	chmod 755 $(DB)/$(LIBNAME)-config
+	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	$(CC) -I$(ZLIBINC) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) \
+	   -o pngtesti `$(BINPATH)/libpng12-config --ldflags`
+	./pngtesti pngtest.png
 
 clean:
-	/bin/rm -f *.o libpng.a libpng.so* pngtest pngout.png
+	/bin/rm -f *.o libpng.a pngtest pngout.png libpng-config \
+	$(LIBNAME).so $(LIBNAME).so.$(PNGMAJ)* pngtest-static pngtesti \
+	libpng.so.3.$(PNGMIN) \
+	libpng.pc
 
 DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
 writelock:

scripts/makefile.macosx

@@ -1,5 +1,8 @@
 # makefile for libpng, MACOS X
+# Copyright (C) 2002 Glenn Randers-Pehrson
 # Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
+# Modified by Karin Kosina <kyrah@sim.no> 20011010:
+# build shared library (*.dylib)
 # For conditions of distribution and use, see copyright notice in png.h
 
 # where make install puts libpng.a and png.h
@@ -12,8 +15,35 @@ ZLIBLIB=../zlib
 ZLIBINC=../zlib
 
 CC=cc
-CFLAGS=-I$(ZLIBINC) -O # -g -DPNG_DEBUG=5
-LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz
+
+PNGMAJ = 0
+PNGMIN = 1.2.6beta1
+PNGVER = $(PNGMAJ).$(PNGMIN)
+
+CFLAGS=-fno-common -I$(ZLIBINC) -O # -g -DPNG_DEBUG=5
+LDFLAGS=-L$(ZLIBLIB) libpng.a -lz
+
+LIBNAME=libpng12
+SHAREDLIB_POSTFIX=dylib
+INCPATH=$(prefix)/include
+LIBPATH=$(prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
 
 #RANLIB=echo
 RANLIB=ranlib
@@ -22,30 +52,125 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
 
-all: libpng.a pngtest
+all: libpng.a pngtest shared libpng.pc libpng-config
+
+shared: $(LIBNAME).$(PNGVER).$(SHAREDLIB_POSTFIX)
+
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! | \
+	   sed -e s/-lm// > libpng.pc
+
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo L_opts=\"-L$(LIBPATH)\"; \
+	echo libs=\"-lpng12 -lz\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+	chmod +x libpng-config
 
 libpng.a: $(OBJS)
 	ar rc $@  $(OBJS)
 	$(RANLIB) $@
 
+$(LIBNAME).$(PNGVER).$(SHAREDLIB_POSTFIX): $(OBJS)
+	cc -dynamiclib -flat_namespace -undefined suppress -o $@ $(OBJS)
+
+libpng.3.$(PNGMIN).$(SHAREDLIB_POSTFIX): $(OBJS)
+	cc -dynamiclib -compatibility_version 3 -flat_namespace \
+	-undefined suppress -o $@ $(OBJS)
+
 pngtest: pngtest.o libpng.a
 	$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
 
 test: pngtest
 	./pngtest
 
-install: libpng.a
-	-@mkdir $(prefix)/include
-	-@mkdir $(prefix)/lib
-	cp png.h $(prefix)/include
-	cp pngconf.h $(prefix)/include
-	chmod 644 $(prefix)/include/png.h
-	chmod 644 $(prefix)/include/pngconf.h
-	cp libpng.a $(prefix)/lib
-	chmod 644 $(prefix)/lib/libpng.a
+install-headers: png.h pngconf.h
+	-@if [ ! -d $(DI) ]; then mkdir $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then mkdir $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h $(DI)/$(LIBNAME)
+	chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h
+	-@/bin/rm -f $(DI)/png.h $(DI)/pngconf.h
+	-@/bin/rm -f $(DI)/libpng
+	(cd $(DI); ln -f -s $(LIBNAME) libpng; ln -f -s $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	chmod 644 $(DL)/$(LIBNAME).a
+	-@/bin/rm -f $(DL)/libpng.a
+	(cd $(DL); ln -f -s $(LIBNAME).a libpng.a)
+
+install-shared: install-headers $(LIBNAME).$(PNGVER).$(SHAREDLIB_POSTFIX) \
+	libpng.pc libpng.3.$(PNGMIN).$(SHAREDLIB_POSTFIX)
+	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
+	-@/bin/rm -f \
+	$(DL)/$(LIBNAME).$(PNGVER)*.$(SHAREDLIB_POSTFIX)
+	-@/bin/rm -f $(DL)/$(LIBNAME).$(SHAREDLIB_POSTFIX)
+	-@/bin/rm -f libpng.$(SHARED_POSTFIX)
+	-@/bin/rm -f libpng.3.$(SHARED_POSTFIX)
+	-@/bin/rm -f libpng.3.$(PNGMIN)*.$(SHARED_POSTFIX)
+	cp libpng.3.$(PNGMIN).$(SHAREDLIB_POSTFIX) $(DL)
+	cp $(LIBNAME).$(PNGVER).$(SHAREDLIB_POSTFIX) $(DL)
+	chmod 755 $(DL)/$(LIBNAME).$(PNGVER).$(SHAREDLIB_POSTFIX)
+	chmod 755 $(DL)/libpng.3.$(PNGMIN).$(SHAREDLIB_POSTFIX)
+	(cd $(DL); \
+	ln -f -s libpng.3.$(PNGMIN).$(SHARED_POSTFIX) \
+	libpng.3.$(SHARED_POSTFIX); \
+	ln -f -s libpng.3.$(SHARED_POSTFIX) libpng.$(SHARED_POSTFIX); \
+	ln -f -s $(LIBNAME).$(PNGVER).$(SHARED_POSTFIX) \
+	libpng.$(SHARED_POSTFIX); \
+	ln -f -s libpng.3.$(PNGMIN).$(SHARED_POSTFIX) \
+	libpng.3.$(SHARED_POSTFIX); \
+	ln -f -s $(LIBNAME).$(PNGVER).$(SHAREDLIB_POSTFIX) \
+	$(LIBNAME).$(PNGMAJ).$(SHAREDLIB_POSTFIX); \
+	ln -f -s $(LIBNAME).$(PNGMAJ).$(SHAREDLIB_POSTFIX) \
+	$(LIBNAME).$(SHAREDLIB_POSTFIX))
+	-@if [ ! -d $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
+	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
+	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; ln -f -s $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
+	-@/bin/rm -f $(DM)/man3/libpng.3
+	-@/bin/rm -f $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
+	-@/bin/rm -f $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
+	-@/bin/rm -f $(DB)/libpng-config
+	-@/bin/rm -f $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	chmod 755 $(DB)/$(LIBNAME)-config
+	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+# If you installed in $(DESTDIR), test-installed won't work until you
+# move the library to its final location.
+
+test-installed:
+	$(CC) $(CFLAGS) \
+	   `$(BINPATH)/libpng12-config --cflags` pngtest.c \
+	   -L$(ZLIBLIB) \
+	   -o pngtesti `$(BINPATH)/libpng12-config --ldflags`
+	./pngtesti pngtest.png
 
 clean:
-	rm -f *.o libpng.a pngtest pngout.png
+	rm -f *.o libpng.a pngtest pngout.png libpng-config \
+	$(LIBNAME).$(PNGVER).$(SHAREDLIB_POSTFIX) \
+	$(LIBNAME).$(SHAREDLIB_POSTFIX) \
+	libpng.3.$(PNGMIN).$(SHAREDLIB_POSTFIX) \
+	libpng.pc
 
 DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
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