Imported from libpng-1.2.0beta3.tar

ANNOUNCE

@@ -1,57 +1,26 @@
 
-Libpng 1.0.9rc2 - January 22, 2001
+Libpng 1.2.0beta3 - May 18, 2001
 
 This is a public release of libpng, intended for use in production codes.
 
-Changes since the last public release (1.0.8):
+Changes since the last public release (1.0.11):
 
-  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.
-  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.
-  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().
-  Added support for filter method 64 (for PNG datastreams embedded in MNG)
-  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.
-  Revised libpng.3/libpng.txt.  Changed "filter type" to "filter method".
-  Fixed error handling of unknown compression type in png_decompress_chunk().
-  In pngconf.h, define __cdecl when _MSC_VER is defined.
-  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.
-  Moved pngasmrd.h into pngconf.h.
-  Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop.
-  Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to
-    wince and msvc project module definition files.
-  Fixed bug with progressive reading of narrow interlaced images in pngpread.c
-  Do not typedef png_FILE_io in pngconf.h when PNG_NO_STDIO is defined.
-  Updated makefile.sgi to make shared library.
+  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.
+  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.
+  Added a check for attempts to read or write PLTE in grayscale PNG datastreams.
+  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.
+  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.
 
 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
@@ -883,11 +884,75 @@ version 1.0.9beta9 [January 15, 2001]
 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 1.0.9rc2 [January 22, 2001]
+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 18, 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.
 
 Send comments/corrections/commendations to
 png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu

INSTALL

@@ -1,5 +1,5 @@
 
-Installing libpng version 1.0.9rc2 - January 22, 2001
+Installing libpng version 1.2.0beta3 - May 18, 2001
 
 Before installing libpng, you must first install zlib.  zlib
 can usually be found wherever you got libpng.  zlib can be
@@ -10,7 +10,7 @@ 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-1.0.9rc2" or "lpng109" and "zlib-1.1.3"
+might be called "libpng-1.2.0beta3" or "lpng109" and "zlib-1.1.3"
 or "zlib113") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
@@ -28,6 +28,7 @@ Your directory structure should look like this:
              pngsuite
              visupng
           projects
+             beos
              borland
              msvc
              wince
@@ -59,8 +60,8 @@ 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.2.1.0.9rc2)
- makefile.gcmmx    =>  Linux/ELF makefile (gcc, creates libpng.so.2.1.0.9rc2,
+ makefile.linux    =>  Linux/ELF makefile (gcc, creates libpng.so.2.1.2.0beta3)
+ makefile.gcmmx    =>  Linux/ELF makefile (gcc, creates libpng.so.2.1.2.0beta3,
                        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
@@ -69,15 +70,17 @@ include
  makefile.aix      =>  AIX makefile
  makefile.cygwin   =>  Cygwin/gcc makefile
  makefile.dec      =>  DEC Alpha UNIX 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
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
- makefile.sggcc    =>  Silicon Graphics (gcc, creates libpng.so.2.1.0.9rc2)
+ makefile.sggcc    =>  Silicon Graphics (gcc, creates libpng.so.2.1.2.0beta3)
  makefile.sunos    =>  Sun makefile
- makefile.solaris  =>  Solaris 2.X makefile (gcc, creates libpng.so.2.1.0.9rc2)
+ makefile.solaris  =>  Solaris 2.X makefile (gcc, creates libpng.so.2.1.2.0beta3)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.mips     =>  MIPS makefile
  makefile.acorn    =>  Acorn makefile

KNOWNBUG

@@ -1,9 +1,8 @@
 
-Known bugs in libpng-1.0.9
+Known bugs in libpng-1.2.0
 
-1: January 16, 2001 -- BUG -- progressive reading narrow interlaced PNGs
+1. April 22, 2001: pnggccrd.c has been reported to crash on NetBSD when
+   reading interlaced PNG files, when assembler code is enabled.
 
-   A crash occurs in Mozilla when reading a 2x533 interlaced RGB image.
+   STATUS: Under investigation.
 
-   Status: Under investigation.  It appears that pngpread.c is not
-   taking care to skip empty passes.

LICENSE

@@ -8,7 +8,7 @@ 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 1.0.9rc2, January 22, 2001, are
+libpng versions 1.0.7, July 1, 2000, through 1.2.0beta3, May 18, 2001, are
 Copyright (c) 2000 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
-January 22, 2001
+May 18, 2001

README

@@ -1,4 +1,4 @@
-README for libpng 1.0.9rc2 - January 22, 2001 (shared library 2.1)
+README for libpng 1.2.0beta3 - May 18, 2001 (shared library 2.1)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -172,6 +172,7 @@ 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
@@ -182,9 +183,9 @@ Files in this distribution:
        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.2.1.0.9rc2)
+                            (gcc, creates libpng.so.2.1.2.0beta3)
        makefile.gcmmx   =>  Linux/ELF makefile (gcc, creates
-                            libpng.so.2.1.0.9rc2, uses assembler code
+                            libpng.so.2.1.2.0beta3, 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
@@ -193,16 +194,18 @@ Files in this distribution:
        makefile.aix     =>  AIX makefile
        makefile.cygwin  =>  Cygwin/gcc makefile
        makefile.dec     =>  DEC Alpha UNIX 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, uses PNGGCCRD
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
-       makefile.sggcc   =>  Silicon Graphics (gcc, creates libpng.so.2.1.0.9rc2)
+       makefile.sggcc   =>  Silicon Graphics (gcc, creates libpng.so.2.1.2.0beta3)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng.so.2.1.0.9rc2)
+                            (gcc, creates libpng.so.2.1.2.0beta3)
        makefile.sco     =>  For SCO OSr5  ELF and Unixware 7 with Native cc
        makefile.mips    =>  MIPS makefile
        makefile.acorn   =>  Acorn makefile

Y2KINFO

@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      January 22, 2001
+      May 18, 2001
 
       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 1.0.9rc2 are Y2K compliant.  It is my belief that earlier
+      upward through 1.2.0beta3 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-1.0.9rc2.  Instead, please
+  There is no \"configure\" script for Libpng-1.2.0beta3.  Instead, please
   copy the appropriate makefile for your system from the \"scripts\"
   directory.  Read the INSTALL file for more details.
 "

contrib/gregbook/readpng2.c

@@ -49,8 +49,77 @@ static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg);
 
 void readpng2_version_info(void)
 {
+#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.\n",
       PNG_LIBPNG_VER_STRING, png_libpng_ver);
+#endif
 
     fprintf(stderr, "   Compiled with zlib %s; using zlib %s.\n",
       ZLIB_VERSION, zlib_version);
@@ -111,6 +180,97 @@ int readpng2_init(mainprog_info *mainprog_ptr)
     png_set_progressive_read_fn(png_ptr, 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;
@@ -370,6 +530,7 @@ static void readpng2_end_callback(png_structp png_ptr, png_infop info_ptr)
 
     (*mainprog_ptr->mainprog_finish_display)();
 
+    info_ptr = info_ptr; /* without this the compiler whines about info_ptr */
 
     /* all done */
 

contrib/gregbook/rpng2-win.c

@@ -56,7 +56,7 @@
 
 #define PROGNAME  "rpng2-win"
 #define LONGNAME  "Progressive PNG Viewer for Windows"
-#define VERSION   "1.20 of 4 January 2001"
+#define VERSION   "1.20 of 29 January 2001"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -373,6 +373,10 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
             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 != '-') {
@@ -428,7 +432,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
         fprintf(stderr, "\n"
           "Usage:  %s [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing]\n"
 #if (defined(__i386__) || defined(_M_IX86))
-          "        %*s [-nommxfilters] [-nommxcombine] [-nommxinterlace]\n"
+          "        %*s [[-nommxfilters] [-nommxcombine] [-nommxinterlace] | -nommx]\n"
 #endif
           "        %*s file.png\n\n"
           "    exp \ttransfer-function exponent (``gamma'') of the display\n"

contrib/gregbook/rpng2-x.c

@@ -56,7 +56,7 @@
 
 #define PROGNAME  "rpng2-x"
 #define LONGNAME  "Progressive PNG Viewer for X"
-#define VERSION   "1.20 of 4 January 2001"
+#define VERSION   "1.20 of 29 January 2001"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -367,6 +367,10 @@ int main(int argc, char **argv)
             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 != '-') {
@@ -428,7 +432,7 @@ int main(int argc, char **argv)
         fprintf(stderr, "\n"
           "Usage:  %s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n"
 #if (defined(__i386__) || defined(_M_IX86))
-          "        %*s [-nommxfilters] [-nommxcombine] [-nommxinterlace]\n"
+          "        %*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"

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\libpng3.lib /nologo /subsystem:console /machine:I386
 # Begin Special Build Tool
 OutDir=.\dll
 SOURCE="$(InputPath)"
@@ -84,7 +84,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll_dbg\libpng1d.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll_dbg\libpng3d.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 # Begin Special Build Tool
 OutDir=.\dll_dbg
 SOURCE="$(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\libpng3a.lib /nologo /subsystem:console /machine:I386
 # Begin Special Build Tool
 OutDir=.\dll_asm
 SOURCE="$(InputPath)"
@@ -144,7 +144,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll_dbga\libpng1b.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 ..\..\projects\msvc\win32\libpng\dll_dbga\libpng3b.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 # Begin Special Build Tool
 OutDir=.\dll_dbga
 SOURCE="$(InputPath)"

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 libpng3.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 libpng3.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 libpng3.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 libpng3d.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 libpng3.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 libpng3d.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

@@ -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 */
@@ -494,7 +495,7 @@ row_callback(png_structp png_ptr, png_bytep new_row,
  * 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
+ * png_memcpy for you) if it will make the code easier.  Thus, you
  * can just do this for all cases:
  */
 
@@ -603,7 +604,8 @@ 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, PNG_MAX_PALETTE_LENGTH * 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, PNG_MAX_PALETTE_LENGTH);
    /* You must not free palette here, because png_set_PLTE only makes a link to

libpng.3

@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "January 22, 2001"
+.TH LIBPNG 3 "May 18, 2001"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.0beta3
 .SH SYNOPSIS
 \fI\fB
 
@@ -196,6 +196,18 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 \fI\fB
 
+\fBpng_byte png_get_mmx_bitdepth_threshold (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fBpng_uint_32 png_get_mmx_flagmask (int \fP\fIflag_select\fP\fB, int \fI*compilerID\fP\fB);\fP
+
+\fI\fB
+
+\fBpng_uint_32 png_get_mmx_rowbytes_threshold (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
 \fBpng_uint_32 png_get_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*offset_x\fP\fB, png_uint_32 \fP\fI*offset_y\fP\fB, int \fI*unit_type\fP\fB);\fP
 
 \fI\fB
@@ -306,11 +318,15 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 \fI\fB
 
-\fBvoid png_info_init (png_infop \fIinfo_ptr\fP\fB);\fP
+\fBvoid png_init_io (png_structp \fP\fIpng_ptr\fP\fB, FILE \fI*fp\fP\fB);\fP
 
 \fI\fB
 
-\fBvoid png_init_io (png_structp \fP\fIpng_ptr\fP\fB, FILE \fI*fp\fP\fB);\fP
+\fBDEPRECATED: void png_info_init (png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fBDEPRECATED: void png_info_init_2 (png_infopp \fP\fIptr_ptr\fP\fB, png_size_t \fIpng_info_struct_size\fP\fB);\fP
 
 \fI\fB
 
@@ -342,7 +358,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 \fI\fB
 
-\fBvoid png_permit_empty_plte (png_structp \fP\fIpng_ptr\fP\fB, int \fIempty_plte_permitted\fP\fB);\fP
+\fBDEPRECATED: void png_permit_empty_plte (png_structp \fP\fIpng_ptr\fP\fB, int \fIempty_plte_permitted\fP\fB);\fP
 
 \fI\fB
 
@@ -370,7 +386,9 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 \fI\fB
 
-\fBDEPRECATED: void png_read_init_2 (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fP\fIuser_png_ver\fP\fB, png_size_t \fP\fIpng_struct_size\fP\fB, png_size_t \fIpng_info_size\fP\fB);\fP
+\fBDEPRECATED: void png_read_init_2 (png_structpp \fP\fIptr_ptr\fP\fB, png_const_charp \fP\fIuser_png_ver\fP\fB, png_size_t \fP\fIpng_struct_size\fP\fB, png_size_t \fIpng_info_size\fP\fB);\fP
+
+\fI\fB
 
 \fBvoid png_read_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
 
@@ -524,6 +542,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 \fI\fB
 
+\fBpng_set_mmx_thresholds (png_structp \fP\fIpng_ptr\fP\fB, png_byte \fP\fImmx_bitdepth_threshold\fP\fB, png_uint_32 \fImmx_rowbytes_threshold\fP\fB);\fP
+
+\fI\fB
+
 \fBvoid png_set_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIoffset_x\fP\fB, png_uint_32 \fP\fIoffset_y\fP\fB, int \fIunit_type\fP\fB);\fP
 
 \fI\fB
@@ -616,6 +638,12 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 \fI\fB
 
+\fBvoid png_set_strip_error_numbers (png_structp \fIpng_ptr,
+
+\fBpng_uint_32 \fIstrip_mode\fP\fB);\fP
+
+\fI\fB
+
 \fBvoid png_set_swap (png_structp \fIpng_ptr\fP\fB);\fP
 
 \fI\fB
@@ -724,7 +752,7 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 \fI\fB
 
-\fBDEPRECATED: void png_write_init_2 (png_structp \fP\fIpng_ptr\fP\fB, png_const_charp \fP\fIuser_png_ver\fP\fB, png_size_t \fP\fIpng_struct_size\fP\fB, png_size_t \fIpng_info_size\fP\fB);\fP
+\fBDEPRECATED: void png_write_init_2 (png_structpp \fP\fIptr_ptr\fP\fB, png_const_charp \fP\fIuser_png_ver\fP\fB, png_size_t \fP\fIpng_struct_size\fP\fB, png_size_t \fIpng_info_size\fP\fB);\fP
 
 \fI\fB
 
@@ -759,10 +787,10 @@ Following is a copy of the libpng.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.9rc2 - January 22, 2001
+ libpng version 1.2.0beta3 - May 18, 2001
  Updated and distributed by Glenn Randers-Pehrson
  <randeg@alum.rpi.edu>
- Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ Copyright (c) 1998-2001 Glenn Randers-Pehrson
  For conditions of distribution and use, see copyright
  notice in png.h.
 
@@ -1016,10 +1044,11 @@ 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 */
@@ -1044,7 +1073,8 @@ 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 */
     }
@@ -1090,16 +1120,23 @@ 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,
@@ -1127,9 +1164,11 @@ 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
@@ -1197,8 +1236,8 @@ in until png_read_end() has read the chunk data following the image.
     interlace_type - (PNG_INTERLACE_NONE or
                      PNG_INTERLACE_ADAM7)
     Any or all of interlace_type, compression_type, of
-                     filter_method 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
@@ -1261,14 +1300,15 @@ 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);
@@ -1324,21 +1364,24 @@ into the info_ptr is returned for any complex types.
                          string for unknown).
     text_ptr[i].translated_keyword  - 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
@@ -1346,7 +1389,7 @@ 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
@@ -1354,47 +1397,50 @@ 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;
@@ -1409,8 +1455,8 @@ 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
@@ -1944,7 +1990,7 @@ 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
@@ -1954,16 +2000,17 @@ 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,
@@ -2282,7 +2329,8 @@ 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 */
     }
@@ -2310,8 +2358,9 @@ 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  |
@@ -2447,11 +2496,12 @@ 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);
@@ -2505,11 +2555,13 @@ 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);
@@ -2540,9 +2592,10 @@ 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
@@ -2551,14 +2604,15 @@ 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.
@@ -2659,12 +2713,17 @@ 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.
 
@@ -2928,7 +2987,7 @@ 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
@@ -2938,16 +2997,17 @@ 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
@@ -3028,8 +3088,8 @@ 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_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
-      malloc_fn, png_free_ptr free_fn)
+    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
 
@@ -3037,9 +3097,14 @@ This function also provides a void pointer that can be retrieved via
 
 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_uint_32 size);
     void free_fn(png_structp png_ptr, png_voidp ptr);
 
+Your malloc_fn() can 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
@@ -3249,10 +3314,12 @@ structures appropriately for all of the filter types.
 
     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().
+              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
@@ -3364,8 +3431,106 @@ 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.
 
+.SH VI.  Runtime optimization
 
-.SH VI.  MNG support
+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).
+
+For more extensive examples of runtime querying, enabling and disabling
+of optimized features, see contrib/gregbook/readpng2.c in the libpng
+source-code distribution.
+
+
+.SH 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.
@@ -3390,7 +3555,7 @@ 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.
 
-.SH VII.  Changes to Libpng from version 0.88
+.SH 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
@@ -3400,7 +3565,7 @@ 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.
 
@@ -3439,15 +3604,15 @@ application:
 
    png_uint_32 application_vn = PNG_LIBPNG_VER;
 
-.SH VIII. Y2K Compliance in libpng
+.SH IX. Y2K Compliance in libpng
 
-January 22, 2001
+May 18, 2001
 
 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 1.0.9rc2 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.0beta3 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
@@ -3465,7 +3630,8 @@ 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
@@ -3504,43 +3670,74 @@ on the library has not always been consistent and straightforward.
 The following table summarizes matters since version 0.89c, which was
 the first widely used release:
 
-   source                   png.h    png.h   shared-lib
-   version                  string     int   version
-   -------                  ------   -----  ----------
-   0.89c ("1.0 beta 3")     0.89        89  1.0.89
-   0.90  ("1.0 beta 4")     0.90        90  0.90  [should have been 2.0.90]
-   0.95  ("1.0 beta 5")     0.95        95  0.95  [should have been 2.0.95]
-   0.96  ("1.0 beta 6")     0.96        96  0.96  [should have been 2.0.96]
-   0.97b ("1.00.97 beta 7") 1.00.97     97  1.0.1 [should have been 2.0.97]
-   0.97c                    0.97        97  2.0.97
-   0.98                     0.98        98  2.0.98
-   0.99                     0.99        98  2.0.99
-   0.99a-m                  0.99        99  2.0.99
-   1.00                     1.00       100  2.1.0 [100 should be 10000]
-   1.0.0                    1.0.0      100  2.1.0 [100 should be 10000]
-   1.0.1                    1.0.1    10001  2.1.0
-   1.0.1a-e                 1.0.1a-e 10002  2.1.0.1a-e
-   1.0.2                    1.0.2    10002  2.1.0.2
-   1.0.2a-b                 1.0.2a-b 10003  2.1.0.2a-b
-   1.0.3                    1.0.3    10003  2.1.0.3
-   1.0.3a-d                 1.0.3a-d 10004  2.1.0.3a-d
-   1.0.4                    1.0.4    10004  2.1.0.4
-   1.0.4a-f                 1.0.4a-f 10005  2.1.0.4a-f
-   1.0.5 (+ 2 patches)      1.0.5    10005  2.1.0.5
-   1.0.5a-d                 1.0.5a-d 10006  2.1.0.5a-d
-   1.0.5e-r                 1.0.5e-r 10100  2.1.0.5e-r (not compatible)
-   1.0.5s-v                 1.0.5s-v 10006  2.1.0.5s-v (compatible)
-   1.0.6 (+ 3 patches)      1.0.6    10006  2.1.0.6
-   1.0.6d                   1.0.6d   10007  2.1.0.6d
-   1.0.7                    1.0.7    10007  2.1.0.7    (still compatible)
+ source             png.h  png.h  shared-lib
+ version            string   int  version
+ -------            ------  ----- ----------
+ 0.89c ("beta 3")  0.89       89  1.0.89
+ 0.90  ("beta 4")  0.90       90  0.90
+ 0.95  ("beta 5")  0.95       95  0.95
+ 0.96  ("beta 6")  0.96       96  0.96
+ 0.97b ("beta 7")  1.00.97    97  1.0.1
+ 0.97c             0.97       97  2.0.97
+ 0.98              0.98       98  2.0.98
+ 0.99              0.99       98  2.0.99
+ 0.99a-m           0.99       99  2.0.99
+ 1.00              1.00      100  2.1.0
+ 1.0.0             1.0.0     100  2.1.0
+ 1.0.0   (from here on, the  100  2.1.0
+ 1.0.1    png.h string is  10001  2.1.0
+ 1.0.1a-e identical to the 10002  from here on, the
+ 1.0.2    source version)  10002  shared library is 2.V
+ 1.0.2a-b                  10003  where V is the source
+ 1.0.1                     10001  code version except as
+ 1.0.1a-e                  10002  2.1.0.1a-e   noted.
+ 1.0.2                     10002  2.1.0.2
+ 1.0.2a-b                  10003  2.1.0.2a-b
+ 1.0.3                     10003  2.1.0.3
+ 1.0.3a-d                  10004  2.1.0.3a-d
+ 1.0.4                     10004  2.1.0.4
+ 1.0.4a-f                  10005  2.1.0.4a-f
+ 1.0.5 (+ 2 patches)       10005  2.1.0.5
+ 1.0.5a-d                  10006  2.1.0.5a-d
+ 1.0.5e-r                  10100  2.1.0.5e-r
+ 1.0.5s-v                  10006  2.1.0.5s-v
+ 1.0.6 (+ 3 patches)       10006  2.1.0.6
+ 1.0.6d-g                  10007  2.1.0.6d-g
+ 1.0.6h                    10007  10.6h
+ 1.0.6i                    10007  10.6i
+ 1.0.6j                    10007  2.1.0.6j
+ 1.0.7beta11-14    DLLNUM  10007  2.1.0.7beta11-14
+ 1.0.7beta15-18       1    10007  2.1.0.7beta15-18
+ 1.0.7rc1-2           1    10007  2.1.0.7rc1-2
+ 1.0.7                1    10007  2.1.0.7
+ 1.0.8beta1-4         1    10008  2.1.0.8beta1-4
+ 1.0.8rc1             1    10008  2.1.0.8rc1
+ 1.0.8                1    10008  2.1.0.8
+ 1.0.9beta1-6         1    10009  2.1.0.9beta1-6
+ 1.0.9rc1             1    10009  2.1.0.9rc1
+ 1.0.9beta7-10        1    10009  2.1.0.9beta7-10
+ 1.0.9rc2             1    10009  2.1.0.9rc2
+ 1.0.9                1    10009  2.1.0.9
+ 1.0.10beta1          1    10010  2.1.0.10beta1
+ 1.0.10rc1            1    10010  2.1.0.10rc1
+ 1.0.10               1    10010  2.1.0.10
+ 1.0.11beta1-3        1    10011  2.1.0.11beta1-3
+ 1.0.11rc1            1    10011  2.1.0.11rc1
+ 1.0.11               1    10011  2.1.0.11
+ 1.0.12a              2    10012  2.1.0.12a
+ 1.1.0a-f                  10100  2.1.1.0a-f abandoned
+ 1.2.0beta1-2         2    10200  2.1.2.0beta1-2
+ 1.2.0beta3           3    10200  3.1.2.0beta3
 
-   Henceforth the source version will match the shared-library minor
-   and patch numbers; the shared-library major version number will be
-   used for changes in backward compatibility, as it is intended.  The
-   PNG_PNGLIB_VER macro, which is not used within libpng but is available
-   for applications, is an unsigned integer of the form xyyzz corresponding
-   to the source version x.y.z (leading zeros in y and z).  Beta versions
-   are given the previous public release number plus a letter or two.
+Henceforth the source version will match the shared-library minor
+and patch numbers; the shared-library major version number will be
+used for changes in backward compatibility, as it is intended.  The
+PNG_PNGLIB_VER macro, which is not used within libpng but is available
+for applications, is an unsigned integer of the form xyyzz corresponding
+to the source version x.y.z (leading zeros in y and z).  Beta versions
+were given the previous public release number plus a letter, until
+version 1.0.6j; from then on they were given the upcoming public
+release number plus "betaNN" or "rcN".
 
 .SH "SEE ALSO"
 libpngpf(3), png(5)
@@ -3588,7 +3785,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.0.9rc2 - January 22, 2001:
+Libpng version 1.2.0beta3 - May 18, 2001:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (randeg@alum.rpi.edu).
 
@@ -3605,8 +3802,8 @@ included in the libpng distribution, the latter shall prevail.)
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.0.7, July 1, 2000, through  1.0.9rc2, January 22, 2001, are
-Copyright (c) 2000 Glenn Randers-Pehrson, and are
+libpng versions 1.0.7, July 1, 2000, through  1.2.0beta3, May 18, 2001, are
+Copyright (c) 2000-2001 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
 
@@ -3616,12 +3813,13 @@ with the following individuals added to the list of Contributing Authors
 
 and with the following additions to the disclaimer:
 
-   There is no warranty against interference with your enjoyment of the
-   library or against infringement.  There is no warranty that our
-   efforts or the library will fulfill any of your particular purposes
-   or needs.  This library is provided with all faults, and the entire
-   risk of satisfactory quality, performance, accuracy, and effort is with
-   the user.
+   There is no warranty against interference with your
+   enjoyment of the library or against infringement.
+   There is no warranty that our efforts or the library
+   will fulfill any of your particular purposes or needs.
+   This library is provided with all faults, and the entire
+   risk of satisfactory quality, performance, accuracy, and
+   effort is with the user.
 
 libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
 Copyright (c) 1998, 1999 Glenn Randers-Pehrson
@@ -3670,11 +3868,11 @@ to the following restrictions:
 
 1. The origin of this source code must not be misrepresented.
 
-2. Altered versions must be plainly marked as such and must not
-   be misrepresented as being the original source.
+2. Altered versions must be plainly marked as such and
+   must not be misrepresented as being the original source.
 
-3. This Copyright notice may not be removed or altered from any
-   source or altered source distribution.
+3. This Copyright notice may not be removed or altered from
+   any source or altered source distribution.
 
 The Contributing Authors and Group 42, Inc. specifically permit, without
 fee, and encourage the use of this source code as a component to
@@ -3696,7 +3894,7 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 randeg@alum.rpi.edu
-January 22, 2001
+May 18, 2001
 
 .\" end of man page
 

libpng.txt

@@ -1,9 +1,9 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.9rc2 - January 22, 2001
+ libpng version 1.2.0beta3 - May 18, 2001
  Updated and distributed by Glenn Randers-Pehrson
  <randeg@alum.rpi.edu>
- Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
+ Copyright (c) 1998-2001 Glenn Randers-Pehrson
  For conditions of distribution and use, see copyright
  notice in png.h.
 
@@ -257,10 +257,11 @@ 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 +286,8 @@ 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 +333,23 @@ 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 +377,11 @@ 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
@@ -438,8 +449,8 @@ in until png_read_end() has read the chunk data following the image.
     interlace_type - (PNG_INTERLACE_NONE or
                      PNG_INTERLACE_ADAM7)
     Any or all of interlace_type, compression_type, of
-                     filter_method 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
@@ -502,14 +513,15 @@ 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);
@@ -565,21 +577,24 @@ into the info_ptr is returned for any complex types.
                          string for unknown).
     text_ptr[i].translated_keyword  - 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
@@ -587,7 +602,7 @@ 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
@@ -595,47 +610,50 @@ 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;
@@ -650,8 +668,8 @@ 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
@@ -1185,7 +1203,7 @@ 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
@@ -1195,16 +1213,17 @@ 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,
@@ -1523,7 +1542,8 @@ 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 */
     }
@@ -1551,8 +1571,9 @@ 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  |
@@ -1688,11 +1709,12 @@ 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);
@@ -1746,11 +1768,13 @@ 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);
@@ -1781,9 +1805,10 @@ 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
@@ -1792,14 +1817,15 @@ 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.
@@ -1900,12 +1926,17 @@ 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.
 
@@ -2169,7 +2200,7 @@ 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
@@ -2179,16 +2210,17 @@ 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
@@ -2269,8 +2301,8 @@ 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_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
-      malloc_fn, png_free_ptr free_fn)
+    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
 
@@ -2278,9 +2310,14 @@ This function also provides a void pointer that can be retrieved via
 
 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_uint_32 size);
     void free_fn(png_structp png_ptr, png_voidp ptr);
 
+Your malloc_fn() can 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
@@ -2490,10 +2527,12 @@ structures appropriately for all of the filter types.
 
     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().
+              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
@@ -2605,8 +2644,106 @@ 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.  Runtime optimization
 
-VI.  MNG support
+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).
+
+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.
@@ -2631,7 +2768,7 @@ 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.
 
-VII.  Changes to Libpng from version 0.88
+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
@@ -2641,7 +2778,7 @@ 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.
 
@@ -2680,15 +2817,15 @@ application:
 
    png_uint_32 application_vn = PNG_LIBPNG_VER;
 
-VIII. Y2K Compliance in libpng
+IX. Y2K Compliance in libpng
 
-January 22, 2001
+May 18, 2001
 
 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 1.0.9rc2 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.0beta3 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
@@ -2706,7 +2843,8 @@ 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 "January 22, 2001"
+.TH LIBPNGPF 3 "May 18, 2001"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.0beta3
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP
@@ -47,11 +47,11 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 \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 1.0.9rc2
 
 \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
 
@@ -283,6 +283,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 \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
@@ -425,6 +429,8 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 \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 +545,8 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.9rc2
 
 .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 "January 22, 2001"
+.TH PNG 5 "May 18, 2001"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION

png.c

@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * libpng version 1.0.9rc2 - January 22, 2001
+ * libpng version 1.2.0beta3 - May 18, 2001
  * Copyright (c) 1998-2001 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_9rc2 Your_png_h_is_not_version_1_0_9rc2;
+typedef version_1_2_0beta3 Your_png_h_is_not_version_1_2_0beta3;
 
 /* 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] = "1.0.9rc2";
+const char png_libpng_ver[18] = "1.2.0beta3";
 
 /* png_sig was changed to a function in version 1.0.5c */
 /* Place to hold the signature string for a PNG file. */
@@ -135,7 +135,7 @@ png_check_sig(png_bytep sig, int num)
 }
 
 /* Function to allocate memory for zlib and clear it to 0. */
-voidpf PNGAPI
+voidpf /* PRIVATE */
 png_zalloc(voidpf png_ptr, uInt items, uInt size)
 {
    png_uint_32 num_bytes = (png_uint_32)items * size;
@@ -157,7 +157,7 @@ png_zalloc(voidpf png_ptr, uInt items, uInt size)
 }
 
 /* function to free memory for zlib */
-void PNGAPI
+void /* PRIVATE */
 png_zfree(voidpf png_ptr, voidpf ptr)
 {
    png_free((png_structp)png_ptr, (png_voidp)ptr);
@@ -213,12 +213,12 @@ png_create_info_struct(png_structp png_ptr)
    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)
+      png_ptr->malloc_fn, png_ptr->mem_ptr)) != NULL)
 #else
    if ((info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO)) != NULL)
 #endif
    {
-      png_info_init(info_ptr);
+      png_info_init_3(&info_ptr, sizeof(png_info));
    }
 
    return (info_ptr);
@@ -243,7 +243,8 @@ 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
@@ -255,10 +256,28 @@ 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 +301,8 @@ 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)
@@ -536,7 +556,7 @@ 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 +602,31 @@ 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);
@@ -626,7 +646,7 @@ 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 1.0.9rc2 - January 22, 2001\n\
+   return ((png_charp) "\n libpng version 1.2.0beta3 - May 18, 2001\n\
    Copyright (c) 1998-2001 Glenn Randers-Pehrson\n\
    Copyright (c) 1996, 1997 Andreas Dilger\n\
    Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.\n");
@@ -644,8 +664,8 @@ 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) "1.0.9rc2");
-   return((png_charp) "1.0.9rc2");
+      return((png_charp) "1.2.0beta3");
+   return((png_charp) "1.2.0beta3");
 }
 
 png_charp PNGAPI
@@ -667,7 +687,7 @@ png_get_header_version(png_structp png_ptr)
 }
 
 #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-int PNGAPI
+int /* PRIVATE */
 png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
 {
    /* check chunk_name and return "keep" value if it's on the list, else 0 */
@@ -695,17 +715,64 @@ 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) 10200L);
 }
 
 
-#if 0 /* delay this until version 1.2.0 */
-/* this function was added to libpng 1.0.9 (porting aid to libpng-1.2.0) */
-#ifndef PNG_ASSEMBLER_CODE_SUPPORTED
+#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()) {
+        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 /* 0 */

png.h

@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.0.9rc2 - January 22, 2001
+ * libpng version 1.2.0beta3 - May 18, 2001
  * Copyright (c) 1998-2001 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.)
@@ -9,7 +9,7 @@
  * Authors and maintainers:
  *  libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *  libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *  libpng versions 0.97, January 1998, through 1.0.9rc2 - January 22, 2001: Glenn
+ *  libpng versions 0.97, January 1998, through 1.2.0beta3 - May 18, 2001: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -63,6 +63,17 @@
  *    1.0.9rc1                 1    10009  2.1.0.9rc1
  *    1.0.9beta7-10            1    10009  2.1.0.9beta7-10
  *    1.0.9rc2                 1    10009  2.1.0.9rc2
+ *    1.0.9                    1    10009  2.1.0.9
+ *    1.0.10beta1              1    10010  2.1.0.10beta1
+ *    1.0.10rc1                1    10010  2.1.0.10rc1
+ *    1.0.10                   1    10010  2.1.0.10
+ *    1.0.11beta1-3            1    10011  2.1.0.11beta1-3
+ *    1.0.11rc1                1    10011  2.1.0.11rc1
+ *    1.0.11                   1    10011  2.1.0.11
+ *    1.0.12a                  2    10012  2.1.0.12a
+ *    1.1.0a-f                      10100  2.1.1.0a-f (branch abandoned)
+ *    1.2.0beta1-2             2    10200  2.1.2.0beta1-2
+ *    1.2.0beta3               3    10200  3.1.2.0beta3
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -92,7 +103,7 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.0.7, July 1, 2000, through  1.0.9rc2, January 22, 2001, are
+ * libpng versions 1.0.7, July 1, 2000, through  1.2.0beta3, May 18, 2001, are
  * Copyright (c) 2000, 2001 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
@@ -157,11 +168,11 @@
  *
  * 1. The origin of this source code must not be misrepresented.
  *
- * 2. Altered versions must be plainly marked as such and must not
- *    be misrepresented as being the original source.
+ * 2. Altered versions must be plainly marked as such and
+ * must not be misrepresented as being the original source.
  *
- * 3. This Copyright notice may not be removed or altered from any
- *    source or altered source distribution.
+ * 3. This Copyright notice may not be removed or altered from
+ *    any source or altered source distribution.
  *
  * The Contributing Authors and Group 42, Inc. specifically permit, without
  * fee, and encourage the use of this source code as a component to
@@ -197,13 +208,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    January 22, 2001
+ *    May 18, 2001
  *
  *    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 1.0.9rc2 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.2.0beta3 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
@@ -259,19 +270,19 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.0.9rc2"
+#define PNG_LIBPNG_VER_STRING "1.2.0beta3"
 
-#define PNG_LIBPNG_VER_SONUM   2
+#define PNG_LIBPNG_VER_SONUM   3
 #define PNG_LIBPNG_VER_DLLNUM  %DLLNUM%
 
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
-#define PNG_LIBPNG_VER_MINOR   0
-#define PNG_LIBPNG_VER_RELEASE 9
+#define PNG_LIBPNG_VER_MINOR   2
+#define PNG_LIBPNG_VER_RELEASE 0
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
 
-#define PNG_LIBPNG_VER_BUILD  2
+#define PNG_LIBPNG_VER_BUILD  3
 
 #define PNG_LIBPNG_BUILD_ALPHA    1
 #define PNG_LIBPNG_BUILD_BETA     2
@@ -279,14 +290,14 @@
 #define PNG_LIBPNG_BUILD_STABLE   4
 #define PNG_LIBPNG_BUILD_TYPEMASK 7
 #define PNG_LIBPNG_BUILD_PATCH    8 /* Can be OR'ed with STABLE only */
-#define PNG_LIBPNG_BUILD_TYPE 3
+#define PNG_LIBPNG_BUILD_TYPE 2
 
 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
  * We must not include leading zeros.
  * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
  * version 1.0.0 was mis-numbered 100 instead of 10000).  From
  * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release */
-#define PNG_LIBPNG_VER 10009 /* 1.0.9 */
+#define PNG_LIBPNG_VER 10200 /* 1.2.0 */
 
 #ifndef PNG_VERSION_INFO_ONLY
 
@@ -692,6 +703,7 @@ defined(PNG_READ_BACKGROUND_SUPPORTED)
    png_byte pcal_nparams;   /* number of parameters given in pcal_params */
 #endif
 
+/* New members added in libpng-1.0.6 */
 #ifdef PNG_FREE_ME_SUPPORTED
    png_uint_32 free_me;     /* flags items libpng is responsible for freeing */
 #endif
@@ -901,10 +913,10 @@ typedef void (PNGAPI *png_user_transform_ptr) PNGARG((png_structp,
     png_row_infop, png_bytep));
 #endif
 
-#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
+#if defined(PNG_USER_CHUNKS_SUPPORTED)
 typedef int (PNGAPI *png_user_chunk_ptr) PNGARG((png_structp, png_unknown_chunkp));
 #endif
-#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
 typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp));
 #endif
 
@@ -1024,7 +1036,7 @@ struct png_struct_def
 #endif
 #endif
 
-#if defined(PNG_READ_bKGD_SUPPORTED)
+#if defined(PNG_bKGD_SUPPORTED)
    png_byte background_gamma_type;
 #  ifdef PNG_FLOATING_POINT_SUPPORTED
    float background_gamma;
@@ -1032,8 +1044,8 @@ struct png_struct_def
    png_color_16 background;   /* background color in screen gamma space */
 #  if defined(PNG_READ_GAMMA_SUPPORTED)
      png_color_16 background_1; /* background normalized to gamma 1.0 */
-#  endif /* PNG_READ_GAMMA && PNG_READ_bKGD_SUPPORTED */
-#endif /* PNG_READ_bKGD_SUPPORTED */
+#  endif /* PNG_READ_GAMMA && PNG_bKGD_SUPPORTED */
+#endif /* PNG_bKGD_SUPPORTED */
 
 #if defined(PNG_WRITE_FLUSH_SUPPORTED)
    png_flush_ptr output_flush_fn;/* Function for flushing output */
@@ -1058,7 +1070,7 @@ struct png_struct_def
    png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */
 #endif
 
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_sBIT_SUPPORTED)
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED)
    png_color_8 sig_bit;       /* significant bits in each available channel */
 #endif
 
@@ -1066,7 +1078,7 @@ struct png_struct_def
    png_color_8 shift;         /* shift for significant bit tranformation */
 #endif
 
-#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
+#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
  || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
    png_bytep trans;           /* transparency values for paletted files */
    png_color_16 trans_values; /* transparency values for non-paletted files */
@@ -1091,12 +1103,12 @@ struct png_struct_def
    int process_mode;                 /* what push library is currently doing */
    int cur_palette;                  /* current push library palette index */
 
-#  if defined(PNG_READ_TEXT_SUPPORTED)
+#  if defined(PNG_TEXT_SUPPORTED)
      png_size_t current_text_size;   /* current size of text input data */
      png_size_t current_text_left;   /* how much text left to read in input */
      png_charp current_text;         /* current text chunk buffer */
      png_charp current_text_ptr;     /* current location in current_text */
-#  endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_READ_TEXT_SUPPORTED */
+#  endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */
 
 #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
 
@@ -1114,7 +1126,7 @@ struct png_struct_def
    png_bytep dither_index;           /* index translation for palette files */
 #endif
 
-#if defined(PNG_READ_DITHER_SUPPORTED) || defined(PNG_READ_hIST_SUPPORTED)
+#if defined(PNG_READ_DITHER_SUPPORTED) || defined(PNG_hIST_SUPPORTED)
    png_uint_16p hist;                /* histogram */
 #endif
 
@@ -1132,19 +1144,13 @@ struct png_struct_def
    png_charp time_buffer;            /* String to hold RFC 1123 time text */
 #endif
 
-#ifdef PNG_USER_MEM_SUPPORTED
-   png_voidp mem_ptr;                /* user supplied struct for mem functions */
-   png_malloc_ptr malloc_fn;         /* function for allocating memory */
-   png_free_ptr free_fn;             /* function for freeing memory */
-#endif
-
 /* New members added in libpng-1.0.6 */
 
 #ifdef PNG_FREE_ME_SUPPORTED
    png_uint_32 free_me;       /* flags items libpng is responsible for freeing */
 #endif
 
-#if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
+#if defined(PNG_USER_CHUNKS_SUPPORTED)
    png_voidp user_chunk_ptr;
    png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */
 #endif
@@ -1154,33 +1160,59 @@ struct png_struct_def
    png_bytep chunk_list;
 #endif
 
+/* New members added in libpng-1.0.3 */
 #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
    png_byte rgb_to_gray_status;
+   /* These were changed from png_byte in libpng-1.0.6 */
    png_uint_16 rgb_to_gray_red_coeff;
    png_uint_16 rgb_to_gray_green_coeff;
    png_uint_16 rgb_to_gray_blue_coeff;
 #endif
 
+/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
 #if defined(PNG_MNG_FEATURES_SUPPORTED) || \
     defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
     defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
-/* Note to maintainer: change this to png_uint_32 at next opportunity */
-   png_byte mng_features_permitted;
+/* changed from png_byte to png_uint_32 at version 1.2.0 */
+   png_uint_32 mng_features_permitted;
 #endif
 
+/* New member added in libpng-1.0.7 */
 #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
    png_fixed_point int_gamma;
 #endif
 
+/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
    png_byte filter_type;
+#endif
+
+#if defined(PNG_DEBUG) && defined(PNG_USE_PNGGCCRD)
+/* New member added in libpng-1.0.10, ifdef'ed out in 1.2.0 */
+   png_uint_32 row_buf_size;
+#endif
+
+/* New members added in libpng-1.2.0 */
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+   png_byte     mmx_bitdepth_threshold;
+   png_uint_32  mmx_rowbytes_threshold;
+   png_uint_32  asm_flags;
+#endif
+
+/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
+#ifdef PNG_USER_MEM_SUPPORTED
+   png_voidp mem_ptr;                /* user supplied struct for mem functions */
+   png_malloc_ptr malloc_fn;         /* function for allocating memory */
+   png_free_ptr free_fn;             /* function for freeing memory */
+#endif
 
 };
 
 
 /* This prevents a compiler error in png_get_copyright() in png.c if png.c
-and png.h are both at * version 1.0.9rc2
+   and png.h are both at version 1.2.0beta3
  */
-typedef png_structp version_1_0_9rc2;
+typedef png_structp version_1_2_0beta3;
 
 typedef png_struct FAR * FAR * png_structpp;
 
@@ -1231,6 +1263,7 @@ extern PNG_EXPORT(void,png_set_compression_buffer_size)
 /* Reset the compression stream */
 extern PNG_EXPORT(int,png_reset_zstream) PNGARG((png_structp png_ptr));
 
+/* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */
 #ifdef PNG_USER_MEM_SUPPORTED
 extern PNG_EXPORT(png_structp,png_create_read_struct_2)
    PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
@@ -1261,8 +1294,11 @@ extern PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr));
 extern PNG_EXPORT(png_infop,png_create_info_struct)
    PNGARG((png_structp png_ptr));
 
-/* Initialize the info structure (old interface - NOT DLL EXPORTED) */
-extern void png_info_init PNGARG((png_infop info_ptr));
+/* Initialize the info structure (old interface - DEPRECATED) */
+extern PNG_EXPORT(void,png_info_init) PNGARG((png_infop info_ptr));
+#define png_info_init(info_ptr) png_info_init_3(&(info_ptr), sizeof(png_info));
+extern PNG_EXPORT(void,png_info_init_3) PNGARG((png_infopp info_ptr,
+    png_size_t png_info_struct_size));
 
 /* Writes all the PNG information before the image. */
 extern PNG_EXPORT(void,png_write_info_before_PLTE) PNGARG((png_structp png_ptr,
@@ -1694,7 +1730,7 @@ extern PNG_EXPORT(png_voidp,png_get_user_transform_ptr)
    PNGARG((png_structp png_ptr));
 #endif
 
-#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
+#ifdef PNG_USER_CHUNKS_SUPPORTED
 extern PNG_EXPORT(void,png_set_read_user_chunk_fn) PNGARG((png_structp png_ptr,
    png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn));
 extern PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_structp
@@ -1887,7 +1923,7 @@ png_ptr, png_infop info_ptr));
 extern PNG_EXPORT(png_bytep,png_get_signature) PNGARG((png_structp png_ptr,
 png_infop info_ptr));
 
-#if defined(PNG_READ_bKGD_SUPPORTED)
+#if defined(PNG_bKGD_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_color_16p *background));
 #endif
@@ -1897,7 +1933,7 @@ extern PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_color_16p background));
 #endif
 
-#if defined(PNG_READ_cHRM_SUPPORTED)
+#if defined(PNG_cHRM_SUPPORTED)
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 extern PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr,
    png_infop info_ptr, double *white_x, double *white_y, double *red_x,
@@ -1928,7 +1964,7 @@ extern PNG_EXPORT(void,png_set_cHRM_fixed) PNGARG((png_structp png_ptr,
 #endif
 #endif
 
-#if defined(PNG_READ_gAMA_SUPPORTED)
+#if defined(PNG_gAMA_SUPPORTED)
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 extern PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr,
    png_infop info_ptr, double *file_gamma));
@@ -1946,7 +1982,7 @@ extern PNG_EXPORT(void,png_set_gAMA_fixed) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_fixed_point int_file_gamma));
 #endif
 
-#if defined(PNG_READ_hIST_SUPPORTED)
+#if defined(PNG_hIST_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_uint_16p *hist));
 #endif
@@ -1966,7 +2002,7 @@ extern PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr,
    int color_type, int interlace_method, int compression_method,
    int filter_method));
 
-#if defined(PNG_READ_oFFs_SUPPORTED)
+#if defined(PNG_oFFs_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y,
    int *unit_type));
@@ -1978,7 +2014,7 @@ extern PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr,
    int unit_type));
 #endif
 
-#if defined(PNG_READ_pCAL_SUPPORTED)
+#if defined(PNG_pCAL_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1,
    int *type, int *nparams, png_charp *units, png_charpp *params));
@@ -1990,7 +2026,7 @@ extern PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr,
    int type, int nparams, png_charp units, png_charpp params));
 #endif
 
-#if defined(PNG_READ_pHYs_SUPPORTED)
+#if defined(PNG_pHYs_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
 #endif
@@ -2006,7 +2042,7 @@ extern PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr,
 extern PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_colorp palette, int num_palette));
 
-#if defined(PNG_READ_sBIT_SUPPORTED)
+#if defined(PNG_sBIT_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_color_8p *sig_bit));
 #endif
@@ -2016,7 +2052,7 @@ extern PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_color_8p sig_bit));
 #endif
 
-#if defined(PNG_READ_sRGB_SUPPORTED)
+#if defined(PNG_sRGB_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr,
    png_infop info_ptr, int *intent));
 #endif
@@ -2028,7 +2064,7 @@ extern PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr,
    png_infop info_ptr, int intent));
 #endif
 
-#if defined(PNG_READ_iCCP_SUPPORTED)
+#if defined(PNG_iCCP_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_charpp name, int *compression_type,
    png_charpp profile, png_uint_32 *proflen));
@@ -2042,7 +2078,7 @@ extern PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr,
    /* Note to maintainer: profile should be png_bytep */
 #endif
 
-#if defined(PNG_READ_sPLT_SUPPORTED)
+#if defined(PNG_sPLT_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_sPLT_tpp entries));
 #endif
@@ -2052,7 +2088,7 @@ extern PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_sPLT_tp entries, int nentries));
 #endif
 
-#if defined(PNG_READ_TEXT_SUPPORTED)
+#if defined(PNG_TEXT_SUPPORTED)
 /* png_get_text also returns the number of text chunks in *num_text */
 extern PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_textp *text_ptr, int *num_text));
@@ -2071,7 +2107,7 @@ extern PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_textp text_ptr, int num_text));
 #endif
 
-#if defined(PNG_READ_tIME_SUPPORTED)
+#if defined(PNG_tIME_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_timep *mod_time));
 #endif
@@ -2081,7 +2117,7 @@ extern PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_timep mod_time));
 #endif
 
-#if defined(PNG_READ_tRNS_SUPPORTED)
+#if defined(PNG_tRNS_SUPPORTED)
 extern PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr,
    png_infop info_ptr, png_bytep *trans, int *num_trans,
    png_color_16p *trans_values));
@@ -2096,7 +2132,7 @@ extern PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr,
 #if defined(PNG_tRNS_SUPPORTED)
 #endif
 
-#if defined(PNG_READ_sCAL_SUPPORTED)
+#if defined(PNG_sCAL_SUPPORTED)
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 extern PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_structp png_ptr,
    png_infop info_ptr, int *unit, double *width, double *height));
@@ -2106,7 +2142,7 @@ extern PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_structp png_ptr,
    png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight));
 #endif
 #endif
-#endif /* PNG_READ_sCAL_SUPPORTED */
+#endif /* PNG_sCAL_SUPPORTED */
 
 #if defined(PNG_sCAL_SUPPORTED)
 #ifdef PNG_FLOATING_POINT_SUPPORTED
@@ -2117,7 +2153,7 @@ extern PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr,
 extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr,
    png_infop info_ptr, int unit, png_charp swidth, png_charp sheight));
 #endif
-#endif /* PNG_READ_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
+#endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
 
 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
 /* provide a list of chunks and how they are to be handled, if the built-in
@@ -2220,15 +2256,80 @@ extern PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp
    png_ptr, png_uint_32 mng_features_permitted));
 #endif
 
-#if 0 /* delay these until version 1.2.0 */
+/* Added to version 1.2.0 */
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+#define PNG_ASM_FLAG_MMX_SUPPORT_COMPILED  0x01		/* not user-settable */
+#define PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU    0x02		/* not user-settable */
+#define PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  0x04
+#define PNG_ASM_FLAG_MMX_READ_INTERLACE    0x08
+#define PNG_ASM_FLAG_MMX_READ_FILTER_SUB   0x10
+#define PNG_ASM_FLAG_MMX_READ_FILTER_UP    0x20
+#define PNG_ASM_FLAG_MMX_READ_FILTER_AVG   0x40
+#define PNG_ASM_FLAG_MMX_READ_FILTER_PAETH 0x80
+#define PNG_ASM_FLAGS_INITIALIZED          0x80000000	/* not user-settable */
+
+#define PNG_MMX_READ_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 )
+#define PNG_MMX_WRITE_FLAGS ( 0 )
+
+#define PNG_MMX_FLAGS ( PNG_ASM_FLAG_MMX_SUPPORT_COMPILED \
+                      | PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU   \
+                      | PNG_MMX_READ_FLAGS                \
+                      | PNG_MMX_WRITE_FLAGS )
+
+#define PNG_SELECT_READ   1
+#define PNG_SELECT_WRITE  2
+
+
+/* pngget.c */
+extern PNG_EXPORT(png_uint_32,png_get_mmx_flagmask)
+   PNGARG((int flag_select, int *compilerID));
+
+/* pngget.c */
+extern PNG_EXPORT(png_uint_32,png_get_asm_flagmask)
+   PNGARG((int flag_select));
+
+/* pngget.c */
+extern PNG_EXPORT(png_uint_32,png_get_asm_flags)
+   PNGARG((png_structp png_ptr));
+
+/* pngget.c */
+extern PNG_EXPORT(png_byte,png_get_mmx_bitdepth_threshold)
+   PNGARG((png_structp png_ptr));
+
+/* pngget.c */
+extern PNG_EXPORT(png_uint_32,png_get_mmx_rowbytes_threshold)
+   PNGARG((png_structp png_ptr));
+
+/* pngset.c */
+extern PNG_EXPORT(void,png_set_asm_flags)
+   PNGARG((png_structp png_ptr, png_uint_32 asm_flags));
+
+/* pngset.c */
+extern PNG_EXPORT(void,png_set_mmx_thresholds)
+   PNGARG((png_structp png_ptr, png_byte mmx_bitdepth_threshold,
+   png_uint_32 mmx_rowbytes_threshold));
+
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
+
 /* png.c, pnggccrd.c, or pngvcrd.c */
 extern PNG_EXPORT(int,png_mmx_support) PNGARG((void));
+
+/* Strip the prepended error numbers ("#nnn ") from error and warning
+ * messages before passing them to the error or warning handler. */
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+extern PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp
+   png_ptr, png_uint_32 strip_mode));
 #endif
 
 /* Maintainer: Put new public prototypes here ^, in libpng.3, and project defs */
 
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.0.9rc2 - January 22, 2001 (header)\n"
+   " libpng version 1.2.0beta3 - May 18, 2001 (header)\n"
 
 #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
 /* With these routines we avoid an integer divide, which will be slower on
@@ -2351,6 +2452,8 @@ extern PNG_EXPORT(int,png_mmx_support) PNGARG((void));
 #define PNG_FLAG_KEEP_UNKNOWN_CHUNKS      0x8000L
 #define PNG_FLAG_KEEP_UNSAFE_CHUNKS       0x10000L
 #define PNG_FLAG_LIBRARY_MISMATCH         0x20000L
+#define PNG_FLAG_STRIP_ERROR_NUMBERS      0x40000L
+#define PNG_FLAG_STRIP_ERROR_TEXT         0x80000L
 
 /* For use in png_set_keep_unknown, png_handle_as_unknown */
 #define HANDLE_CHUNK_AS_DEFAULT   0
@@ -2442,13 +2545,13 @@ PNG_EXPORT_VAR (const png_byte FARDATA) png_zTXt[5];
  * values, which is almost certainly true.
  */
 #if defined(PNG_READ_BIG_ENDIAN_SUPPORTED)
-#  if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_READ_oFFs_SUPPORTED)
+#  if defined(PNG_pCAL_SUPPORTED) || defined(PNG_oFFs_SUPPORTED)
 #    define png_get_int_32(buf) ( *((png_int_32p) (buf)))
 #  endif
 #  define png_get_uint_32(buf) ( *((png_uint_32p) (buf)))
 #  define png_get_uint_16(buf) ( *((png_uint_16p) (buf)))
 #else
-#  if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_READ_oFFs_SUPPORTED)
+#  if defined(PNG_pCAL_SUPPORTED) || defined(PNG_oFFs_SUPPORTED)
 PNG_EXTERN png_int_32 png_get_int_32 PNGARG((png_bytep buf));
 #  endif
 PNG_EXTERN png_uint_32 png_get_uint_32 PNGARG((png_bytep buf));
@@ -2459,8 +2562,10 @@ PNG_EXTERN png_uint_16 png_get_uint_16 PNGARG((png_bytep buf));
  * (old interface - DEPRECATED - use png_create_read_struct instead).
  */
 extern PNG_EXPORT(void,png_read_init) PNGARG((png_structp png_ptr));
-#define png_read_init(png_ptr) png_read_init_2(png_ptr, \
-    PNG_LIBPNG_VER_STRING,  sizeof(png_struct), sizeof(png_info));
+#define png_read_init(png_ptr) png_read_init_3(&(png_ptr), \
+    PNG_LIBPNG_VER_STRING,  sizeof(png_struct));
+extern PNG_EXPORT(void,png_read_init_3) PNGARG((png_structpp ptr_ptr,
+    png_const_charp user_png_ver, png_size_t png_struct_size));
 extern PNG_EXPORT(void,png_read_init_2) PNGARG((png_structp png_ptr,
     png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t
     png_info_size));
@@ -2469,8 +2574,10 @@ extern PNG_EXPORT(void,png_read_init_2) PNGARG((png_structp png_ptr,
  * (old interface - DEPRECATED - use png_create_write_struct instead).
  */
 extern PNG_EXPORT(void,png_write_init) PNGARG((png_structp png_ptr));
-#define png_write_init(png_ptr) png_write_init_2(png_ptr, \
-    PNG_LIBPNG_VER_STRING, sizeof(png_struct), sizeof(png_info));
+#define png_write_init(png_ptr) png_write_init_3(&(png_ptr), \
+    PNG_LIBPNG_VER_STRING, sizeof(png_struct));
+extern PNG_EXPORT(void,png_write_init_3) PNGARG((png_structpp ptr_ptr,
+    png_const_charp user_png_ver, png_size_t png_struct_size));
 extern PNG_EXPORT(void,png_write_init_2) PNGARG((png_structp png_ptr,
     png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t
     png_info_size));
@@ -2482,9 +2589,9 @@ PNG_EXTERN png_voidp png_create_struct PNGARG((int type));
 PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr));
 
 PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr
-  malloc_fn));
+  malloc_fn, png_voidp mem_ptr));
 PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr,
-   png_free_ptr free_fn));
+   png_free_ptr free_fn, png_voidp mem_ptr));
 
 /* Free any memory that info_ptr points to and reset struct. */
 PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr,
@@ -2512,8 +2619,8 @@ PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf,
    png_size_t length));
 
 /* Decompress data in a chunk that uses compression */
-#if defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) || \
-    defined(PNG_READ_iCCP_SUPPORTED) || defined(PNG_READ_sPLT_SUPPORTED)
+#if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \
+    defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
 PNG_EXTERN png_charp png_decompress_chunk PNGARG((png_structp png_ptr,
    int comp_type, png_charp chunkdata, png_size_t chunklength,
    png_size_t prefix_length, png_size_t *data_length));
@@ -2708,7 +2815,7 @@ PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row,
 
 #if defined(PNG_READ_INTERLACING_SUPPORTED)
 /* expand an interlaced row */
-/* OLD interface:
+/* OLD pre-1.0.9 interface:
 PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info,
    png_bytep row, int pass, png_uint_32 transformations));
  */
@@ -3028,6 +3135,10 @@ PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info,
    png_bytep row));
 #endif
 
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+/* png.c */ /* PRIVATE */
+PNG_EXTERN void png_init_mmx_flags PNGARG((png_structp png_ptr));
+#endif
 /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
 
 #endif /* PNG_INTERNAL */

pngasmrd.h

@@ -1,6 +1,6 @@
 /* pngasmrd.h - assembler version of utilities to read a PNG file
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 2001 Glenn Randers-Pehrson
  *

pngconf.h

@@ -1,6 +1,6 @@
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -33,8 +33,30 @@
 #  define PNG_ZBUF_SIZE 8192
 #endif
 
+/* Enable if you want a write-only libpng */
+
+#ifndef PNG_NO_READ_SUPPORTED
+#  define PNG_READ_SUPPORTED
+#endif
+
+/* Enable if you want a read-only libpng */
+
+#ifndef PNG_NO_WRITE_SUPPORTED
+#  define PNG_WRITE_SUPPORTED
+#endif
+
+/* Enabled by default in 1.2.0.  You can disable this if you don't need to
+   support PNGs that are embedded in MNG datastreams */
+#ifndef PNG_NO_MNG_FEATURES
+#  ifndef PNG_MNG_FEATURES_SUPPORTED
+#    define PNG_MNG_FEATURES_SUPPORTED
+#  endif
+#endif
+
 #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
-#  define PNG_FLOATING_POINT_SUPPORTED
+#  ifndef PNG_FLOATING_POINT_SUPPORTED
+#    define PNG_FLOATING_POINT_SUPPORTED
+#  endif
 #endif
 
 /* If you are running on a machine where you cannot allocate more
@@ -59,50 +81,66 @@
  *   PNG_BUILD_DLL -- building the dll
  *   (no define)   -- building an application, linking to the dll
  *   PNG_STATIC    -- building the static lib, or building an application
- *                    which links to the static lib.
+ *                    that links to the static lib.
+ *   ALL_STATIC    -- building various static libs, or building an application
+ *                    that links to the static libs.
  * Thus,
  * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
  * this bit of #ifdefs will define the 'correct' config variables based on
  * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
  * unnecessary.
+ *
+ * Also, the precedence order is:
+ *   ALL_STATIC (since we can't #undef something outside our namespace)
+ *   PNG_BUILD_DLL
+ *   PNG_STATIC
+ *   (nothing) == PNG_USE_DLL 
  */
 #if defined(__CYGWIN__)
-#  if defined(PNG_BUILD_DLL)
+#  if defined(ALL_STATIC)
+#    if defined(PNG_BUILD_DLL)
+#      undef PNG_BUILD_DLL
+#    endif
 #    if defined(PNG_USE_DLL)
 #      undef PNG_USE_DLL
 #    endif
-#    if !defined(PNG_DLL)
-#      define PNG_DLL
+#    if defined(PNG_DLL)
+#      undef PNG_DLL
 #    endif
-#    if defined(PNG_STATIC)
-#      undef PNG_STATIC
+#    if !defined(PNG_STATIC)
+#      define PNG_STATIC
 #    endif
 #  else
-#    if defined(PNG_STATIC)
+#    if defined (PNG_BUILD_DLL)
+#      if defined(PNG_STATIC)
+#        undef PNG_STATIC
+#      endif
 #      if defined(PNG_USE_DLL)
 #        undef PNG_USE_DLL
 #      endif
-#      if defined(PNG_DLL)
-#        undef PNG_DLL
+#      if !defined(PNG_DLL)
+#        define PNG_DLL
 #      endif
 #    else
-#      if defined(PNG_USE_DLL)
+#      if defined(PNG_STATIC)
+#        if defined(PNG_USE_DLL)
+#          undef PNG_USE_DLL
+#        endif
+#        if defined(PNG_DLL)
+#          undef PNG_DLL
+#        endif
+#      else
+#        if !defined(PNG_USE_DLL)
+#          define PNG_USE_DLL
+#        endif
 #        if !defined(PNG_DLL)
 #          define PNG_DLL
 #        endif
-#      else
-#        if defined(PNG_DLL)
-#           define PNG_USE_DLL
-#        else
-#           define PNG_USE_DLL
-#           define PNG_DLL
-#        endif
-#      endif
-#    endif
+#      endif  
+#    endif  
 #  endif
 #endif
 
-
 /* This protects us against compilers that run on a windowing system
  * and thus don't have or would rather us not use the stdio types:
  * stdin, stdout, and stderr.  The only one currently used is stderr
@@ -219,12 +257,6 @@
 #  endif /* __linux__ */
 #endif /* PNG_SETJMP_SUPPORTED */
 
-#if defined(_AIX) && defined(__xlC__)
-/* This prevents "AIX/xlC" from generating an "index(s,c)" macro in strings.h
- * that conflicts with libpng's png_color_16.index */
-#  undef __STR__
-#endif
-
 #ifdef BSD
 #  include <strings.h>
 #else
@@ -283,7 +315,8 @@
 #  include "alloc.h"
 #endif
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \
+    defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__))
 #  include <malloc.h>
 #endif
 
@@ -362,7 +395,7 @@
  * iTXt is supported.  It is turned off by default, to support old apps
  * that malloc the png_text structure instead of calling png_set_text()
  * and letting libpng malloc it.  It will be turned on by default in
- * libpng-2.0.0.
+ * libpng-1.3.0.
  */
 
 #ifndef PNG_iTXt_SUPPORTED
@@ -413,14 +446,12 @@
 #  define PNG_FREE_ME_SUPPORTED
 #endif
 
+#if defined(PNG_READ_SUPPORTED)
+
 #if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
-    !defined(PNG_NO_READ_TRANSFORMS)
+      !defined(PNG_NO_READ_TRANSFORMS)
 #  define PNG_READ_TRANSFORMS_SUPPORTED
 #endif
-#if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
-    !defined(PNG_NO_WRITE_TRANSFORMS)
-#  define PNG_WRITE_TRANSFORMS_SUPPORTED
-#endif
 
 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 #  ifndef PNG_NO_READ_EXPAND
@@ -493,19 +524,21 @@
 #  endif
 #endif
 
-/* Enable if you need to support PNGs that are embedded in MNG
-   datastreams */
-/*
-#ifndef PNG_NO_MNG_FEATURES
-#  define PNG_MNG_FEATURES_SUPPORTED
-#endif
-*/
-
-/* Deprecated, will be removed from version 2.0.0 */
+/* Deprecated, will be removed from version 2.0.0.
+   Use PNG_MNG_FEATURES_SUPPORTED instead. */
 #ifndef PNG_NO_READ_EMPTY_PLTE
 #  define PNG_READ_EMPTY_PLTE_SUPPORTED
 #endif
 
+#endif /* PNG_READ_SUPPORTED */
+
+#if defined(PNG_WRITE_SUPPORTED)
+
+# if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
+    !defined(PNG_NO_WRITE_TRANSFORMS)
+#  define PNG_WRITE_TRANSFORMS_SUPPORTED
+#endif
+
 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
 #  ifndef PNG_NO_WRITE_SHIFT
 #    define PNG_WRITE_SHIFT_SUPPORTED
@@ -555,6 +588,10 @@
 #  define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 #endif
 
+#ifndef PNG_NO_ERROR_NUMBERS
+#define PNG_ERROR_NUMBERS_SUPPORTED
+#endif
+
 #ifndef PNG_NO_WRITE_FLUSH
 #  define PNG_WRITE_FLUSH_SUPPORTED
 #endif
@@ -564,6 +601,8 @@
 #  define PNG_WRITE_EMPTY_PLTE_SUPPORTED
 #endif
 
+#endif /* PNG_WRITE_SUPPORTED */
+
 #ifndef PNG_NO_STDIO
 #  define PNG_TIME_RFC1123_SUPPORTED
 #endif
@@ -584,26 +623,33 @@
  * png_get_x_offset_microns()
  * png_get_y_offset_microns()
  */
-#ifndef PNG_NO_EASY_ACCESS
+#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
 #  define PNG_EASY_ACCESS_SUPPORTED
 #endif
 
-/* PNG_ASSEMBLER_CODE will be enabled by default in version 1.2.0 
+/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0 
    even when PNG_USE_PNGVCRD or PNG_USE_PNGGCCRD is not defined */
-#ifndef PNG_NO_ASSEMBLER_CODE
-#  if defined(PNG_USE_PNGVCRD) || defined(PNG_USE_PNGGCCRD)
+#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
+#  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 #    define PNG_ASSEMBLER_CODE_SUPPORTED
+#  endif
+#  if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE)
 #    define PNG_MMX_CODE_SUPPORTED
 #  endif
 #endif
 
+#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
+#  define PNG_USER_MEM_SUPPORTED
+#endif
+
 /* These are currently experimental features, define them if you want */
 
 /* very little testing */
 /*
-#define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
-#ifndef PNG_NO_USER_MEM
-#  define PNG_USER_MEM_SUPPORTED
+#ifdef PNG_READ_SUPPORTED
+#  ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
+#    define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
+#  endif
 #endif
 #ifndef PNG_NO_ZALLOC_ZERO
 #  define PNG_ZALLOC_ZERO
@@ -613,7 +659,11 @@
 /* This is only for PowerPC big-endian and 680x0 systems */
 /* some testing */
 /*
-#define PNG_READ_BIG_ENDIAN_SUPPORTED
+#ifdef PNG_READ_SUPPORTED
+#  ifndef PNG_PNG_READ_BIG_ENDIAN_SUPPORTED
+#    define PNG_READ_BIG_ENDIAN_SUPPORTED
+#  endif
+#endif
 */
 
 /* Buggy compilers (e.g., gcc 2.7.2.2) need this */
@@ -633,11 +683,14 @@
  * a bit smaller.
  */
 
-#if !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
+#if defined(PNG_READ_SUPPORTED) && \
+    !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
     !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
 #  define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 #endif
-#if !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
+
+#if defined(PNG_WRITE_SUPPORTED) && \
+    !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
     !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
 #  define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 #endif
@@ -1028,7 +1081,7 @@ typedef z_stream FAR *  png_zstreamp;
  * LIBPNG DLL.
  *
  * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
- * It is equivalent to Microsoft predefined macro _DLL which is
+ * It is equivalent to Microsoft predefined macro _DLL that is
  * automatically defined when you compile using the share
  * version of the CRT (C Run-Time library)
  *
@@ -1145,10 +1198,15 @@ typedef z_stream FAR *  png_zstreamp;
 #    endif
 #    define PNGAPI __cdecl
 #  else
-#    if 0 /* ... other platforms, with other meanings */
+#    if (defined(__IBMC__) || defined(IBMCPP__)) && defined(__OS2__)
+#      define PNGAPI _System
+#      define PNG_IMPEXP
 #    else
-#       define PNGAPI
-#       define PNG_IMPEXP
+#      if 0 /* ... other platforms, with other meanings */
+#      else
+#        define PNGAPI
+#        define PNG_IMPEXP
+#      endif
 #    endif
 #  endif
 #endif
@@ -1216,8 +1274,9 @@ typedef z_stream FAR *  png_zstreamp;
 #  define PNG_ZBUF_SIZE 65536
 #endif
 
+#ifdef PNG_READ_SUPPORTED
 /* Prior to libpng-1.0.9, this block was in pngasmrd.h */
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_INTERNAL)
+#if defined(PNG_INTERNAL)
 
 /* These are the default thresholds before the MMX code kicks in; if either
  * rowbytes or bitdepth is below the threshold, plain C code is used.  These
@@ -1253,7 +1312,8 @@ typedef z_stream FAR *  png_zstreamp;
 #endif
 /* - see pnggccrd.c for info about what is currently enabled */
 
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
+#endif /* PNG_INTERNAL */
+#endif /* PNG_READ_SUPPORTED */
 
 #endif /* PNGCONF_H */
 

pngerror.c

@@ -1,7 +1,7 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -31,6 +31,38 @@ png_default_warning PNGARG((png_structp png_ptr,
 void PNGAPI
 png_error(png_structp png_ptr, png_const_charp 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 (*message == '#')
+     {
+         for (offset=1; offset<15; offset++)
+            if (*(message+offset) == ' ')
+                break;
+         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+         {
+            int i;
+            for (i=0; i<offset-1; i++)
+               msg[i]=message[i+1];
+            msg[i]='\0';
+            message=msg;
+         }
+         else
+            message+=offset;
+     }
+     else
+     {
+         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+         {
+            msg[0]='0';        
+            msg[1]='\0';
+            message=msg;
+         }
+     }
+   }
+#endif
    if (png_ptr->error_fn != NULL)
       (*(png_ptr->error_fn))(png_ptr, message);
 
@@ -47,10 +79,22 @@ png_error(png_structp png_ptr, png_const_charp message)
 void PNGAPI
 png_warning(png_structp png_ptr, png_const_charp 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 (*message == '#')
+     {
+         for (offset=1; offset<15; offset++)
+            if (*(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)(message+offset));
    else
-      png_default_warning(png_ptr, message);
+      png_default_warning(png_ptr, (png_const_charp)(message+offset));
 }
 
 /* These utilities are used internally to build an error message that relates
@@ -61,11 +105,12 @@ 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
+   message)
 {
    int iout = 0, iin = 0;
 
@@ -107,7 +152,7 @@ png_chunk_error(png_structp png_ptr, png_const_charp message)
 void PNGAPI
 png_chunk_warning(png_structp png_ptr, png_const_charp message)
 {
-   char msg[16+64];
+   char msg[18+64];
    png_format_buffer(png_ptr, msg, message);
    png_warning(png_ptr, msg);
 }
@@ -121,6 +166,27 @@ static void /* PRIVATE */
 png_default_error(png_structp png_ptr, png_const_charp message)
 {
 #ifndef PNG_NO_CONSOLE_IO
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   if (*message == '#')
+   {
+     int offset;
+     char error_number[16];
+     for (offset=0; offset<15; offset++)
+     {
+         error_number[offset] = *(message+offset+1);
+         if (*(message+offset) == ' ')
+             break;
+     }
+     if((offset > 1) && (offset < 15))
+     {
+       error_number[offset-1]='\0';
+       fprintf(stderr, "libpng error no. %s: %s\n", error_number, message+offset);
+     }
+     else
+       fprintf(stderr, "libpng error: %s, offset=%d\n", message,offset);
+   }
+   else
+#endif
    fprintf(stderr, "libpng error: %s\n", message);
 #else
    if (message)
@@ -153,7 +219,29 @@ static void /* PRIVATE */
 png_default_warning(png_structp png_ptr, png_const_charp message)
 {
 #ifndef PNG_NO_CONSOLE_IO
-   fprintf(stderr, "libpng warning: %s\n", message);
+#  ifdef PNG_ERROR_NUMBERS_SUPPORTED
+   if (*message == '#')
+   {
+     int offset;
+     char warning_number[16];
+     for (offset=0; offset<15; offset++)
+     {
+        warning_number[offset]=*(message+offset+1);
+        if (*(message+offset) == ' ')
+            break;
+     }
+     if((offset > 1) && (offset < 15))
+     {
+       warning_number[offset-1]='\0';
+       fprintf(stderr, "libpng warning no. %s: %s\n", warning_number,
+          message+offset);
+     }
+     else
+       fprintf(stderr, "libpng warning: %s\n", message);
+   }
+   else
+#  endif
+     fprintf(stderr, "libpng warning: %s\n", message);
 #else
    if (message)
      /* appease compiler */ ;
@@ -188,4 +276,15 @@ png_get_error_ptr(png_structp png_ptr)
 }
 
 
+#ifdef PNG_ERROR_NUMBERS_SUPPORTED
+void
+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
 

pnggccrd.c

@@ -6,7 +6,7 @@
  *     and http://www.intel.com/drg/pentiumII/appnotes/923/923.htm
  *     for Intel's performance analysis of the MMX vs. non-MMX code.
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng version 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * Copyright (c) 1998, Intel Corporation
@@ -95,11 +95,11 @@
  *     variables, not the other way around.  Hence _const4, _mask8_0, etc.
  *
  * 19991024:
- *  - fixed mmxsupport()/png_do_interlace() first-row bug
+ *  - fixed mmxsupport()/png_do_read_interlace() first-row bug
  *     This one was severely weird:  even though mmxsupport() doesn't touch
  *     ebx (where "row" pointer was stored), it nevertheless managed to zero
  *     the register (even in static/non-fPIC code--see below), which in turn
- *     caused png_do_interlace() to return prematurely on the first row of
+ *     caused png_do_read_interlace() to return prematurely on the first row of
  *     interlaced images (i.e., without expanding the interlaced pixels).
  *     Inspection of the generated assembly code didn't turn up any clues,
  *     although it did point at a minor optimization (i.e., get rid of
@@ -203,15 +203,23 @@
  *     - "_ShiftRem.use = 40;"      should have been   "_ShiftRem.use = 48;"
  *     - "psllq _ShiftRem, %%mm2"   should have been   "psrlq _ShiftRem, %%mm2"
  *
+ * 20010101:
+ *  - added new png_init_mmx_flags() function (here only because it needs to
+ *     call mmxsupport(), which should probably become global png_mmxsupport());
+ *     modified other MMX routines to run conditionally (png_ptr->asm_flags)
+ *
  * 20010103:
  *  - renamed mmxsupport() to png_mmx_support(), with auto-set of mmx_supported,
- *     and made it public
+ *     and made it public; moved png_init_mmx_flags() to png.c as internal func
  *
  * 20010104:
  *  - removed dependency on png_read_filter_row_c() (C code already duplicated
  *     within MMX version of png_read_filter_row()) so no longer necessary to
  *     compile it into pngrutil.o
  *
+ * 20010310:
+ *  - fixed buffer-overrun bug in png_combine_row() C code (non-MMX)
+ *
  * STILL TO DO:
  *     - test png_do_read_interlace() 64-bit case (pixel_bytes == 8)
  *     - write MMX code for 48-bit case (pixel_bytes == 6)
@@ -223,15 +231,15 @@
  *     x pick one version of mmxsupport() and get rid of the other
  *     - add error messages to any remaining bogus default cases
  *     - enable pixel_depth == 8 cases in png_read_filter_row()? (test speed)
- *     - add support for runtime enable/disable/query of various MMX routines
+ *     x add support for runtime enable/disable/query of various MMX routines
  */
 
-//#define PNG_DEBUG 2   // GRR
-
 #define PNG_INTERNAL
 #include "png.h"
 
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGGCCRD)
+#if defined(PNG_USE_PNGGCCRD)
+
+int PNGAPI png_mmx_support(void);
 
 #ifdef PNG_USE_LOCAL_ARRAYS
 static const int FARDATA png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
@@ -239,8 +247,9 @@ static const int FARDATA png_pass_inc[7]   = {8, 8, 4, 4, 2, 2, 1};
 static const int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1};
 #endif
 
-// djgpp, Win32, and Cygwin add their own underscores to global variables,
-// so define them without:
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+/* djgpp, Win32, and Cygwin add their own underscores to global variables,
+ * so define them without: */
 #if defined(__DJGPP__) || defined(WIN32) || defined(__CYGWIN__)
 #  define _mmx_supported  mmx_supported
 #  define _unmask         unmask
@@ -277,7 +286,6 @@ static const int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1};
 #  define _pctemp         pctemp
 #endif
 
-static int _mmx_supported = 2;
 
 /* These constants are used in the inlined MMX assembly code.
    Ignore gcc's "At top level: defined but not used" warnings. */
@@ -325,17 +333,52 @@ static int          _patemp;	// temp variables for Paeth routine
 static int          _pbtemp;
 static int          _pctemp;
 
+static void /* PRIVATE */
+png_squelch_warnings(void)
+{
+   _dif = _dif;
+   _patemp = _patemp;
+   _pbtemp = _pbtemp;
+   _pctemp = _pctemp;
+   _const4  = _const4;
+   _const6  = _const6;
+   _MMXLength = _MMXLength;
+   _mask8_0  = _mask8_0;
+   _mask16_1 = _mask16_1;
+   _mask16_0 = _mask16_0;
+   _mask24_2 = _mask24_2;
+   _mask24_1 = _mask24_1;
+   _mask24_0 = _mask24_0;
+   _mask32_3 = _mask32_3;
+   _mask32_2 = _mask32_2;
+   _mask32_1 = _mask32_1;
+   _mask32_0 = _mask32_0;
+   _mask48_5 = _mask48_5;
+   _mask48_4 = _mask48_4;
+   _mask48_3 = _mask48_3;
+   _mask48_2 = _mask48_2;
+   _mask48_1 = _mask48_1;
+   _mask48_0 = _mask48_0;
+}
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
 
 
+static int _mmx_supported = 2;
 
-//===========================================================================//
-//                                                                           //
-//                       P N G _ C O M B I N E _ R O W                       //
-//                                                                           //
-//===========================================================================//
+/*===========================================================================*/
+/*                                                                           */
+/*                       P N G _ C O M B I N E _ R O W                       */
+/*                                                                           */
+/*===========================================================================*/
 
 #if defined(PNG_HAVE_ASSEMBLER_COMBINE_ROW)
 
+#define BPP2  2
+#define BPP3  3		/* bytes per pixel (a.k.a. pixel_bytes) */
+#define BPP4  4
+#define BPP6  6		/* (defined only to help avoid cut-and-paste errors) */
+#define BPP8  8
+
 /* Combines the row recently read in with the previous row.
    This routine takes care of alpha and transparency if requested.
    This routine also handles the two methods of progressive display
@@ -353,23 +396,27 @@ static int          _pctemp;
 void /* PRIVATE */
 png_combine_row(png_structp png_ptr, png_bytep row, int mask)
 {
-   png_debug(1,"in png_combine_row_asm\n");
+   png_debug(1, "in png_combine_row (pnggccrd.c)\n");
 
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
    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();
    }
+#endif
 
    if (mask == 0xff)
    {
+      png_debug(2,"mask == 0xff:  doing single png_memcpy()\n");
       png_memcpy(row, png_ptr->row_buf + 1,
        (png_size_t)((png_ptr->width * png_ptr->row_info.pixel_depth + 7) >> 3));
    }
-   /* GRR:  png_combine_row() never called with mask == 0 */
-   else
+   else   /* (png_combine_row() is never called with mask == 0) */
    {
       switch (png_ptr->row_info.pixel_depth)
       {
-         case 1:        // png_ptr->row_info.pixel_depth
+         case 1:        /* png_ptr->row_info.pixel_depth */
          {
             png_bytep sp;
             png_bytep dp;
@@ -426,7 +473,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
             break;
          }
 
-         case 2:        // png_ptr->row_info.pixel_depth
+         case 2:        /* png_ptr->row_info.pixel_depth */
          {
             png_bytep sp;
             png_bytep dp;
@@ -481,7 +528,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
             break;
          }
 
-         case 4:        // png_ptr->row_info.pixel_depth
+         case 4:        /* png_ptr->row_info.pixel_depth */
          {
             png_bytep sp;
             png_bytep dp;
@@ -535,12 +582,14 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
             break;
          }
 
-         case 8:        // png_ptr->row_info.pixel_depth
+         case 8:        /* png_ptr->row_info.pixel_depth */
          {
             png_bytep srcptr;
             png_bytep dstptr;
 
-            if ( _mmx_supported  )
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
+                /* && _mmx_supported */ )
             {
                png_uint_32 len;
                int diff;
@@ -553,7 +602,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                srcptr = png_ptr->row_buf + 1;
                dstptr = row;
                len  = png_ptr->width &~7;  // reduce to multiple of 8
-               diff = png_ptr->width & 7;  // amount lost
+               diff = (int) (png_ptr->width & 7);  // amount lost
 
                __asm__ __volatile__ (
                   "movd      _unmask, %%mm7  \n\t" // load bit pattern
@@ -627,15 +676,18 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                );
             }
             else /* mmx _not supported - Use modified C routine */
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
             {
                register png_uint_32 i;
                png_uint_32 initial_val = png_pass_start[png_ptr->pass];
-                 // png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
+                 /* png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
                register int stride = png_pass_inc[png_ptr->pass];
-                 // png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
+                 /* png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
                register int rep_bytes = png_pass_width[png_ptr->pass];
-                 // png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
-               register png_uint_32 final_val = png_ptr->width;
+                 /* png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
+               png_uint_32 len = png_ptr->width &~7;  /* reduce to mult. of 8 */
+               int diff = (int) (png_ptr->width & 7); /* amount lost */
+               register png_uint_32 final_val = len;  /* GRR bugfix */
 
                srcptr = png_ptr->row_buf + 1 + initial_val;
                dstptr = row + initial_val;
@@ -646,17 +698,32 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                   srcptr += stride;
                   dstptr += stride;
                }
-            } /* end of else */
+               if (diff)  /* number of leftover pixels:  3 for pngtest */
+               {
+                  final_val+=diff /* *BPP1 */ ;
+                  for (; i < final_val; i += stride)
+                  {
+                     if (rep_bytes > (int)(final_val-i))
+                        rep_bytes = (int)(final_val-i);
+                     png_memcpy(dstptr, srcptr, rep_bytes);
+                     srcptr += stride;
+                     dstptr += stride;
+                  }
+               }
+
+            } /* end of else (_mmx_supported) */
 
             break;
-         }       // end 8 bpp
+         }       /* end 8 bpp */
 
-         case 16:       // png_ptr->row_info.pixel_depth
+         case 16:       /* png_ptr->row_info.pixel_depth */
          {
             png_bytep srcptr;
             png_bytep dstptr;
 
-            if ( _mmx_supported )
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
+                /* && _mmx_supported */ )
             {
                png_uint_32 len;
                int diff;
@@ -669,7 +736,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                srcptr = png_ptr->row_buf + 1;
                dstptr = row;
                len  = png_ptr->width &~7;  // reduce to multiple of 8
-               diff = png_ptr->width & 7;  // amount lost
+               diff = (int) (png_ptr->width & 7); // amount lost //
 
                __asm__ __volatile__ (
                   "movd      _unmask, %%mm7   \n\t" // load bit pattern
@@ -759,15 +826,18 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                );
             }
             else /* mmx _not supported - Use modified C routine */
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
             {
                register png_uint_32 i;
-               png_uint_32 initial_val = 2 * png_pass_start[png_ptr->pass];
-                 // png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
-               register int stride = 2 * png_pass_inc[png_ptr->pass];
-                 // png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
-               register int rep_bytes = 2 * png_pass_width[png_ptr->pass];
-                 // png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
-               register png_uint_32 final_val = 2 * png_ptr->width;
+               png_uint_32 initial_val = BPP2 * png_pass_start[png_ptr->pass];
+                 /* png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
+               register int stride = BPP2 * png_pass_inc[png_ptr->pass];
+                 /* png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
+               register int rep_bytes = BPP2 * png_pass_width[png_ptr->pass];
+                 /* png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
+               png_uint_32 len = png_ptr->width &~7;  /* reduce to mult. of 8 */
+               int diff = (int) (png_ptr->width & 7); /* amount lost */
+               register png_uint_32 final_val = BPP2 * len;   /* GRR bugfix */
 
                srcptr = png_ptr->row_buf + 1 + initial_val;
                dstptr = row + initial_val;
@@ -778,17 +848,31 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                   srcptr += stride;
                   dstptr += stride;
                }
-            } /* end of else */
+               if (diff)  /* number of leftover pixels:  3 for pngtest */
+               {
+                  final_val+=diff*BPP2;
+                  for (; i < final_val; i += stride)
+                  {
+                     if (rep_bytes > (int)(final_val-i))
+                        rep_bytes = (int)(final_val-i);
+                     png_memcpy(dstptr, srcptr, rep_bytes);
+                     srcptr += stride;
+                     dstptr += stride;
+                  }
+               }
+            } /* end of else (_mmx_supported) */
 
             break;
-         }       // end 16 bpp
+         }       /* end 16 bpp */
 
-         case 24:       // png_ptr->row_info.pixel_depth
+         case 24:       /* png_ptr->row_info.pixel_depth */
          {
             png_bytep srcptr;
             png_bytep dstptr;
 
-            if ( _mmx_supported )
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
+                /* && _mmx_supported */ )
             {
                png_uint_32 len;
                int diff;
@@ -801,7 +885,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                srcptr = png_ptr->row_buf + 1;
                dstptr = row;
                len  = png_ptr->width &~7;  // reduce to multiple of 8
-               diff = png_ptr->width & 7;  // amount lost
+               diff = (int) (png_ptr->width & 7); // amount lost //
 
                __asm__ __volatile__ (
                   "movd      _unmask, %%mm7   \n\t" // load bit pattern
@@ -906,15 +990,18 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                );
             }
             else /* mmx _not supported - Use modified C routine */
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
             {
                register png_uint_32 i;
-               png_uint_32 initial_val = 3 * png_pass_start[png_ptr->pass];
-                 // png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
-               register int stride = 3 * png_pass_inc[png_ptr->pass];
-                 // png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
-               register int rep_bytes = 3 * png_pass_width[png_ptr->pass];
-                 // png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
-               register png_uint_32 final_val = 3 * png_ptr->width;
+               png_uint_32 initial_val = BPP3 * png_pass_start[png_ptr->pass];
+                 /* png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
+               register int stride = BPP3 * png_pass_inc[png_ptr->pass];
+                 /* png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
+               register int rep_bytes = BPP3 * png_pass_width[png_ptr->pass];
+                 /* png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
+               png_uint_32 len = png_ptr->width &~7;  /* reduce to mult. of 8 */
+               int diff = (int) (png_ptr->width & 7); /* amount lost */
+               register png_uint_32 final_val = BPP3 * len;   /* GRR bugfix */
 
                srcptr = png_ptr->row_buf + 1 + initial_val;
                dstptr = row + initial_val;
@@ -925,17 +1012,31 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                   srcptr += stride;
                   dstptr += stride;
                }
-            } /* end of else */
+               if (diff)  /* number of leftover pixels:  3 for pngtest */
+               {
+                  final_val+=diff*BPP3;
+                  for (; i < final_val; i += stride)
+                  {
+                     if (rep_bytes > (int)(final_val-i))
+                        rep_bytes = (int)(final_val-i);
+                     png_memcpy(dstptr, srcptr, rep_bytes);
+                     srcptr += stride;
+                     dstptr += stride;
+                  }
+               }
+            } /* end of else (_mmx_supported) */
 
             break;
-         }       // end 24 bpp
+         }       /* end 24 bpp */
 
-         case 32:       // png_ptr->row_info.pixel_depth
+         case 32:       /* png_ptr->row_info.pixel_depth */
          {
             png_bytep srcptr;
             png_bytep dstptr;
 
-            if ( _mmx_supported )
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
+                /* && _mmx_supported */ )
             {
                png_uint_32 len;
                int diff;
@@ -948,7 +1049,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                srcptr = png_ptr->row_buf + 1;
                dstptr = row;
                len  = png_ptr->width &~7;  // reduce to multiple of 8
-               diff = png_ptr->width & 7;  // amount lost
+               diff = (int) (png_ptr->width & 7); // amount lost //
 
                __asm__ __volatile__ (
                   "movd      _unmask, %%mm7   \n\t" // load bit pattern
@@ -1060,15 +1161,18 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                );
             }
             else /* mmx _not supported - Use modified C routine */
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
             {
                register png_uint_32 i;
-               png_uint_32 initial_val = 4 * png_pass_start[png_ptr->pass];
-                 // png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
-               register int stride = 4 * png_pass_inc[png_ptr->pass];
-                 // png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
-               register int rep_bytes = 4 * png_pass_width[png_ptr->pass];
-                 // png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
-               register png_uint_32 final_val = 4 * png_ptr->width;
+               png_uint_32 initial_val = BPP4 * png_pass_start[png_ptr->pass];
+                 /* png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
+               register int stride = BPP4 * png_pass_inc[png_ptr->pass];
+                 /* png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
+               register int rep_bytes = BPP4 * png_pass_width[png_ptr->pass];
+                 /* png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
+               png_uint_32 len = png_ptr->width &~7;  /* reduce to mult. of 8 */
+               int diff = (int) (png_ptr->width & 7); /* amount lost */
+               register png_uint_32 final_val = BPP4 * len;   /* GRR bugfix */
 
                srcptr = png_ptr->row_buf + 1 + initial_val;
                dstptr = row + initial_val;
@@ -1079,17 +1183,31 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                   srcptr += stride;
                   dstptr += stride;
                }
-            } /* end of else */
+               if (diff)  /* number of leftover pixels:  3 for pngtest */
+               {
+                  final_val+=diff*BPP4;
+                  for (; i < final_val; i += stride)
+                  {
+                     if (rep_bytes > (int)(final_val-i))
+                        rep_bytes = (int)(final_val-i);
+                     png_memcpy(dstptr, srcptr, rep_bytes);
+                     srcptr += stride;
+                     dstptr += stride;
+                  }
+               }
+            } /* end of else (_mmx_supported) */
 
             break;
-         }       // end 32 bpp
+         }       /* end 32 bpp */
 
-         case 48:       // png_ptr->row_info.pixel_depth
+         case 48:       /* png_ptr->row_info.pixel_depth */
          {
             png_bytep srcptr;
             png_bytep dstptr;
 
-            if ( _mmx_supported )
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
+                /* && _mmx_supported */ )
             {
                png_uint_32 len;
                int diff;
@@ -1102,7 +1220,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                srcptr = png_ptr->row_buf + 1;
                dstptr = row;
                len  = png_ptr->width &~7;  // reduce to multiple of 8
-               diff = png_ptr->width & 7;  // amount lost
+               diff = (int) (png_ptr->width & 7); // amount lost //
 
                __asm__ __volatile__ (
                   "movd      _unmask, %%mm7   \n\t" // load bit pattern
@@ -1231,15 +1349,18 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                );
             }
             else /* mmx _not supported - Use modified C routine */
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
             {
                register png_uint_32 i;
-               png_uint_32 initial_val = 6 * png_pass_start[png_ptr->pass];
-                 // png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
-               register int stride = 6 * png_pass_inc[png_ptr->pass];
-                 // png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
-               register int rep_bytes = 6 * png_pass_width[png_ptr->pass];
-                 // png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
-               register png_uint_32 final_val = 6 * png_ptr->width;
+               png_uint_32 initial_val = BPP6 * png_pass_start[png_ptr->pass];
+                 /* png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
+               register int stride = BPP6 * png_pass_inc[png_ptr->pass];
+                 /* png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
+               register int rep_bytes = BPP6 * png_pass_width[png_ptr->pass];
+                 /* png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
+               png_uint_32 len = png_ptr->width &~7;  /* reduce to mult. of 8 */
+               int diff = (int) (png_ptr->width & 7); /* amount lost */
+               register png_uint_32 final_val = BPP6 * len;   /* GRR bugfix */
 
                srcptr = png_ptr->row_buf + 1 + initial_val;
                dstptr = row + initial_val;
@@ -1250,23 +1371,37 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                   srcptr += stride;
                   dstptr += stride;
                }
-            } /* end of else */
+               if (diff)  /* number of leftover pixels:  3 for pngtest */
+               {
+                  final_val+=diff*BPP6;
+                  for (; i < final_val; i += stride)
+                  {
+                     if (rep_bytes > (int)(final_val-i))
+                        rep_bytes = (int)(final_val-i);
+                     png_memcpy(dstptr, srcptr, rep_bytes);
+                     srcptr += stride;
+                     dstptr += stride;
+                  }
+               }
+            } /* end of else (_mmx_supported) */
 
             break;
-         }       // end 48 bpp
+         }       /* end 48 bpp */
 
-         case 64:       // png_ptr->row_info.pixel_depth
+         case 64:       /* png_ptr->row_info.pixel_depth */
          {
             png_bytep srcptr;
             png_bytep dstptr;
             register png_uint_32 i;
-            png_uint_32 initial_val = 8 * png_pass_start[png_ptr->pass];
-              // png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
-            register int stride = 8 * png_pass_inc[png_ptr->pass];
-              // png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
-            register int rep_bytes = 8 * png_pass_width[png_ptr->pass];
-              // png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
-            register png_uint_32 final_val = 8 * png_ptr->width;
+            png_uint_32 initial_val = BPP8 * png_pass_start[png_ptr->pass];
+              /* png.c:  png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
+            register int stride = BPP8 * png_pass_inc[png_ptr->pass];
+              /* png.c:  png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
+            register int rep_bytes = BPP8 * png_pass_width[png_ptr->pass];
+              /* png.c:  png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
+            png_uint_32 len = png_ptr->width &~7;  /* reduce to mult. of 8 */
+            int diff = (int) (png_ptr->width & 7); /* amount lost */
+            register png_uint_32 final_val = BPP8 * len;   /* GRR bugfix */
 
             srcptr = png_ptr->row_buf + 1 + initial_val;
             dstptr = row + initial_val;
@@ -1277,12 +1412,25 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                srcptr += stride;
                dstptr += stride;
             }
-            break;
-         }       // end 64 bpp
+            if (diff)  /* number of leftover pixels:  3 for pngtest */
+            {
+               final_val+=diff*BPP8;
+               for (; i < final_val; i += stride)
+               {
+                  if (rep_bytes > (int)(final_val-i))
+                     rep_bytes = (int)(final_val-i);
+                  png_memcpy(dstptr, srcptr, rep_bytes);
+                  srcptr += stride;
+                  dstptr += stride;
+               }
+            }
 
-         default:   // png_ptr->row_info.pixel_depth != 1,2,4,8,16,24,32,48,64
+            break;
+         }       /* end 64 bpp */
+
+         default: /* png_ptr->row_info.pixel_depth != 1,2,4,8,16,24,32,48,64 */
          {
-            // this should never happen
+            /* this should never happen */
             fprintf(stderr,
               "libpng internal error:  png_ptr->row_info.pixel_depth = %d\n",
               png_ptr->row_info.pixel_depth);
@@ -1300,11 +1448,11 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
 
 
 
-//===========================================================================//
-//                                                                           //
-//                 P N G _ D O _ R E A D _ I N T E R L A C E                 //
-//                                                                           //
-//===========================================================================//
+/*===========================================================================*/
+/*                                                                           */
+/*                 P N G _ D O _ R E A D _ I N T E R L A C E                 */
+/*                                                                           */
+/*===========================================================================*/
 
 #if defined(PNG_READ_INTERLACING_SUPPORTED)
 #if defined(PNG_HAVE_ASSEMBLER_READ_INTERLACE)
@@ -1319,13 +1467,19 @@ 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;
+#if defined(PNG_READ_PACKSWAP_SUPPORTED)
    png_uint_32 transformations = png_ptr->transformations;
+#endif
 
-   png_debug(1,"in png_do_read_interlace\n");
+   png_debug(1, "in png_do_read_interlace (pnggccrd.c)\n");
 
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
    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();
    }
+#endif
 
    if (row != NULL && row_info != NULL)
    {
@@ -1505,30 +1659,34 @@ png_do_read_interlace(png_structp png_ptr)
             break;
          }
 
-         //====================================================================
+       /*====================================================================*/
 
-         default:  // 8-bit or larger (this is where the routine is modified)
+         default: /* 8-bit or larger (this is where the routine is modified) */
          {
+#if 0
 //          static unsigned long long _const4 = 0x0000000000FFFFFFLL;  no good
 //          static unsigned long long const4 = 0x0000000000FFFFFFLL;   no good
 //          unsigned long long _const4 = 0x0000000000FFFFFFLL;         no good
 //          unsigned long long const4 = 0x0000000000FFFFFFLL;          no good
+#endif
             png_bytep sptr, dp;
             png_uint_32 i;
             png_size_t pixel_bytes;
-            int width = row_info->width;
+            int width = (int)row_info->width;
 
             pixel_bytes = (row_info->pixel_depth >> 3);
 
-            // point sptr at the last pixel in the pre-expanded row:
+            /* point sptr at the last pixel in the pre-expanded row: */
             sptr = row + (width - 1) * pixel_bytes;
 
-            // point dp at the last pixel position in the expanded row:
+            /* point dp at the last pixel position in the expanded row: */
             dp = row + (final_width - 1) * pixel_bytes;
 
-            // New code by Nirav Chhatrapati - Intel Corporation
+            /* New code by Nirav Chhatrapati - Intel Corporation */
 
-            if ( _mmx_supported )
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE)
+                /* && _mmx_supported */ )
             {
                //--------------------------------------------------------------
                if (pixel_bytes == 3)
@@ -1779,7 +1937,9 @@ png_do_read_interlace(png_structp png_ptr)
                         */
 
                         for (j = 0; j < png_pass_inc[pass]; j++)
+                        {
                            *dp-- = *sptr;
+                        }
                         --sptr;
                      }
                   }
@@ -1832,7 +1992,9 @@ png_do_read_interlace(png_structp png_ptr)
                         int j;
 
                         for (j = 0; j < png_pass_inc[pass]; j++)
+                        {
                            *dp-- = *sptr;
+                        }
                         --sptr;
                      }
                   }
@@ -1884,7 +2046,9 @@ png_do_read_interlace(png_structp png_ptr)
                         int j;
 
                         for (j = 0; j < png_pass_inc[pass]; j++)
+                        {
                            *dp-- = *sptr;
+                        }
                         --sptr;
                      }
                   }
@@ -2409,10 +2573,11 @@ png_do_read_interlace(png_structp png_ptr)
             } // end of _mmx_supported ========================================
 
             else /* MMX not supported:  use modified C code - takes advantage
-                  *   of inlining of memcpy for a constant */
+                  *   of inlining of png_memcpy for a constant */
                  /* GRR 19991007:  does it?  or should pixel_bytes in each
                   *   block be replaced with immediate value (e.g., 1)? */
                  /* GRR 19991017:  replaced with constants in each case */
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
             {
                if (pixel_bytes == 1)
                {
@@ -2420,7 +2585,9 @@ png_do_read_interlace(png_structp png_ptr)
                   {
                      int j;
                      for (j = 0; j < png_pass_inc[pass]; j++)
+                     {
                         *dp-- = *sptr;
+                     }
                      --sptr;
                   }
                }
@@ -2463,6 +2630,14 @@ png_do_read_interlace(png_structp png_ptr)
                      png_memcpy(v, sptr, 4);
                      for (j = 0; j < png_pass_inc[pass]; j++)
                      {
+#ifdef PNG_DEBUG
+               if (dp < row || dp+3 > row+png_ptr->row_buf_size)
+                 {
+                  printf("dp out of bounds: row=%d, dp=%d, rp=%d\n",row, dp,
+                    row+png_ptr->row_buf_size);
+                  printf("row_buf=%d\n",png_ptr->row_buf_size);
+                 }
+#endif
                         png_memcpy(dp, v, 4);
                         dp -= 4;
                      }
@@ -2499,7 +2674,7 @@ png_do_read_interlace(png_structp png_ptr)
                      sptr -= 8;
                   }
                }
-               else     // GRR:  should never be reached
+               else     /* GRR:  should never be reached */
                {
                   for (i = width; i; i--)
                   {
@@ -2532,6 +2707,8 @@ png_do_read_interlace(png_structp png_ptr)
 
 
 
+#if defined(PNG_HAVE_ASSEMBLER_READ_FILTER_ROW)
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
 
 // These variables are utilized in the functions below.  They are declared
 // globally here to ensure alignment on 8-byte boundaries.
@@ -2543,9 +2720,6 @@ union uAll {
   _HBClearMask = {0x7f7f7f7f7f7f7f7fLL},
   _ActiveMask, _ActiveMask2, _ActiveMaskEnd, _ShiftBpp, _ShiftRem;
 
-
-
-
 //===========================================================================//
 //                                                                           //
 //           P N G _ R E A D _ F I L T E R _ R O W _ M M X _ A V G           //
@@ -4739,18 +4913,19 @@ png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row,
 
 } // end of png_read_filter_row_mmx_up()
 
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
 
 
 
-//===========================================================================//
-//                                                                           //
-//                   P N G _ R E A D _ F I L T E R _ R O W                   //
-//                                                                           //
-//===========================================================================//
 
-#if defined(PNG_HAVE_ASSEMBLER_READ_FILTER_ROW)
+/*===========================================================================*/
+/*                                                                           */
+/*                   P N G _ R E A D _ F I L T E R _ R O W                   */
+/*                                                                           */
+/*===========================================================================*/
 
-// Optimized png_read_filter_row routines
+
+/* Optimized png_read_filter_row routines */
 
 void /* PRIVATE */
 png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
@@ -4760,6 +4935,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
    char filnm[10];
 #endif
 
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
 /* GRR:  these are superseded by png_ptr->asm_flags: */
 #define UseMMX_sub    1   // GRR:  converted 20000730
 #define UseMMX_up     1   // GRR:  converted 20000729
@@ -4767,22 +4943,41 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
 #define UseMMX_paeth  1   // GRR:  converted 20000828
 
    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();
    }
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
 
 #ifdef PNG_DEBUG
-   png_debug(1, "in png_read_filter_row\n");
+   png_debug(1, "in png_read_filter_row (pnggccrd.c)\n");
    switch (filter)
    {
       case 0: sprintf(filnm, "none");
          break;
-      case 1: sprintf(filnm, "sub-%s", "MMX");
+      case 1: sprintf(filnm, "sub-%s",
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" : 
+#endif
+"x86");
          break;
-      case 2: sprintf(filnm, "up-%s", "MMX");
+      case 2: sprintf(filnm, "up-%s",
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" :
+#endif
+ "x86");
          break;
-      case 3: sprintf(filnm, "avg-%s", "MMX");
+      case 3: sprintf(filnm, "avg-%s",
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" :
+#endif
+ "x86");
          break;
-      case 4: sprintf(filnm, "Paeth-%s", "MMX");
+      case 4: sprintf(filnm, "Paeth-%s",
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":
+#endif
+"x86");
          break;
       default: sprintf(filnm, "unknw");
          break;
@@ -4800,13 +4995,15 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
          break;
 
       case PNG_FILTER_VALUE_SUB:
-         if (
-             (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
-             (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+         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_ASSEMBLER_CODE_SUPPORTED */
          {
             png_uint_32 i;
             png_uint_32 istop = row_info->rowbytes;
@@ -4819,17 +5016,19 @@ 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_sub
+         }  /* end !UseMMX_sub */
          break;
 
       case PNG_FILTER_VALUE_UP:
-         if (
-             (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
-             (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+         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);
          }
-         else
+          else
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
          {
             png_uint_32 i;
             png_uint_32 istop = row_info->rowbytes;
@@ -4841,17 +5040,19 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
                *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
                rp++;
             }
-         }  //end !UseMMX_up
+         }  /* end !UseMMX_up */
          break;
 
       case PNG_FILTER_VALUE_AVG:
-         if (
-             (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
-             (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+         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);
          }
          else
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
          {
             png_uint_32 i;
             png_bytep rp = row;
@@ -4873,17 +5074,19 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
                   ((int)(*pp++ + *lp++) >> 1)) & 0xff);
                rp++;
             }
-         }  //end !UseMMX_avg
+         }  /* end !UseMMX_avg */
          break;
 
       case PNG_FILTER_VALUE_PAETH:
-         if (
-             (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
-             (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+         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);
          }
          else
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
          {
             png_uint_32 i;
             png_bytep rp = row;
@@ -4934,7 +5137,7 @@ 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_paeth
+         }  /* end !UseMMX_paeth */
          break;
 
       default:
@@ -4947,27 +5150,27 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
 #endif /* PNG_HAVE_ASSEMBLER_READ_FILTER_ROW */
 
 
+/*===========================================================================*/
+/*                                                                           */
+/*                      P N G _ M M X _ S U P P O R T                        */
+/*                                                                           */
+/*===========================================================================*/
 
-
-//===========================================================================//
-//                                                                           //
-//                            M M X S U P P O R T                            //
-//                                                                           //
-//===========================================================================//
-
-// GRR NOTES:  (1) the following code assumes 386 or better (pushfl/popfl)
-//             (2) all instructions compile with gcc 2.7.2.3 and later
-//             (3) the function is moved down here to prevent gcc from
-//                  inlining it in multiple places and then barfing be-
-//                  cause the ".NOT_SUPPORTED" label is multiply defined
-//             [is there a way to signal that a *single* function should
-//              not be inlined?  is there a way to modify the label for
-//              each inlined instance, e.g., by appending _1, _2, etc.?
-//              maybe if don't use leading "." in label name? (nope...sigh)]
+/* GRR NOTES:  (1) the following code assumes 386 or better (pushfl/popfl)
+ *             (2) all instructions compile with gcc 2.7.2.3 and later
+ *             (3) the function is moved down here to prevent gcc from
+ *                  inlining it in multiple places and then barfing be-
+ *                  cause the ".NOT_SUPPORTED" label is multiply defined
+ *             [is there a way to signal that a *single* function should
+ *              not be inlined?  is there a way to modify the label for
+ *              each inlined instance, e.g., by appending _1, _2, etc.?
+ *              maybe if don't use leading "." in label name? (nope...sigh)]
+ */
 
 int PNGAPI
 png_mmx_support(void)
 {
+#if defined(PNG_MMX_CODE_SUPPORTED)
     __asm__ __volatile__ (
         "pushl %%ebx          \n\t"  // ebx gets clobbered by CPUID instruction
         "pushl %%ecx          \n\t"  // so does ecx...
@@ -5002,18 +5205,16 @@ png_mmx_support(void)
         "jz .NOT_SUPPORTED    \n\t"  // non-zero = yes, MMX IS supported
 
         "movl $1, %%eax       \n\t"  // set return value to 1
-        "movl %%eax, _mmx_supported \n\t" // save in global static variable, too
-        "popl %%edx           \n\t"  // restore edx
-        "popl %%ecx           \n\t"  // restore ecx
-        "popl %%ebx           \n\t"  // restore ebx ("row" in png_do_interlace)
-        "ret                  \n\t"  // DONE:  have MMX support
+        "jmp  .RETURN         \n\t"  // DONE:  have MMX support
 
     ".NOT_SUPPORTED:          \n\t"  // target label for jump instructions
         "movl $0, %%eax       \n\t"  // set return value to 0
+    ".RETURN:          \n\t"  // target label for jump instructions
         "movl %%eax, _mmx_supported \n\t" // save in global static variable, too
         "popl %%edx           \n\t"  // restore edx
         "popl %%ecx           \n\t"  // restore ecx
-        "popl %%ebx           \n\t"  // restore ebx ("row" in png_do_interlace)
+        "popl %%ebx           \n\t"  // restore ebx
+
 //      "ret                  \n\t"  // DONE:  no MMX support
                                      // (fall through to standard C "ret")
 
@@ -5026,8 +5227,12 @@ png_mmx_support(void)
 //      , "memory"   // if write to a variable gcc thought was in a reg
 //      , "cc"       // "condition codes" (flag bits)
     );
+#else     
+    _mmx_supported = 0;
+#endif /* PNG_MMX_CODE_SUPPORTED */
 
-    // return %%eax;
+    return _mmx_supported;
 }
 
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED && PNG_USE_PNGGCCRD */
+
+#endif /* PNG_USE_PNGGCCRD */

pngget.c

@@ -1,7 +1,7 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -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)
 {
@@ -576,7 +576,7 @@ 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 +594,7 @@ 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 +618,7 @@ 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 +654,7 @@ 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 +701,7 @@ 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 +716,7 @@ 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 +738,7 @@ 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 +753,7 @@ 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 +792,7 @@ 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)
@@ -811,7 +811,7 @@ png_get_rgb_to_gray_status (png_structp png_ptr)
 }
 #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)
 {
@@ -826,3 +826,92 @@ png_get_compression_buffer_size(png_structp png_ptr)
    return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
 }
 
+
+#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 */

pngmem.c

@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -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, NULL, 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;
@@ -48,9 +48,18 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn)
 #ifdef PNG_USER_MEM_SUPPORTED
    if(malloc_fn != NULL)
    {
-      if ((struct_ptr = (*(malloc_fn))(NULL, size)) != NULL)
+      if (mem_ptr != NULL)
+      {
+         png_struct dummy_struct;
+         png_structp png_ptr = &dummy_struct;
+         png_ptr->mem_ptr=mem_ptr;
+         struct_ptr = (*(malloc_fn))(png_ptr, size);
+      }
+      else
+         struct_ptr = (*(malloc_fn))(NULL, size);
+      if (struct_ptr != NULL)
          png_memset(struct_ptr, 0, size);
-         return (struct_ptr);
+      return (struct_ptr);
    }
 #endif /* PNG_USER_MEM_SUPPORTED */
    if ((struct_ptr = (png_voidp)farmalloc(size)) != NULL)
@@ -66,12 +75,13 @@ 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
    if (struct_ptr != NULL)
@@ -81,6 +91,7 @@ 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;
       }
@@ -119,7 +130,12 @@ png_malloc(png_structp png_ptr, png_uint_32 size)
 
 #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, size));
+       if (ret == NULL)
+          png_error(png_ptr, "Out of memory!");
+       return (ret);
+   }
    else
        return png_malloc_default(png_ptr, size);
 }
@@ -281,14 +297,14 @@ 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, NULL, 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.*/
 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;
@@ -304,7 +320,16 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn)
 #ifdef PNG_USER_MEM_SUPPORTED
    if(malloc_fn != NULL)
    {
-      if ((struct_ptr = (*(malloc_fn))(NULL, size)) != NULL)
+      if (mem_ptr != NULL)
+      {
+         png_struct dummy_struct;
+         png_structp png_ptr = &dummy_struct;
+         png_ptr->mem_ptr=mem_ptr;
+         struct_ptr = (*(malloc_fn))(png_ptr, size);
+      }
+      else
+         struct_ptr = (*(malloc_fn))(NULL, size);
+      if (struct_ptr != NULL)
          png_memset(struct_ptr, 0, size);
       return (struct_ptr);
    }
@@ -332,12 +357,13 @@ 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 +373,7 @@ 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;
       }
@@ -373,15 +400,18 @@ 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);
 
 #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, size));
+       if (ret == NULL)
+          png_error(png_ptr, "Out of Memory!");
+       return (ret);
+   }
    else
        return (png_malloc_default(png_ptr, size));
 }
@@ -407,9 +437,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size)
 #endif
 
    if (ret == NULL)
-   {
       png_error(png_ptr, "Out of Memory");
-   }
 
    return (ret);
 }

pngpread.c

@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -796,6 +796,19 @@ png_push_process_row(png_structp png_ptr)
                   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, NULL);
+                   png_read_push_finish_row(png_ptr);
+                }
+            }
+            if (png_ptr->pass == 6 && png_ptr->height <= 4)
+            {
+                png_push_have_row(png_ptr, NULL);
+                png_read_push_finish_row(png_ptr);
+            }
             break;
          }
          case 1:
@@ -982,7 +995,8 @@ 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))
       {
@@ -994,7 +1008,7 @@ 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;
@@ -1073,7 +1087,8 @@ png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
 
 #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))
       {
@@ -1185,8 +1200,8 @@ 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);
@@ -1257,7 +1272,8 @@ png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
 
 #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))
       {
@@ -1269,7 +1285,7 @@ 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;
@@ -1367,7 +1383,8 @@ 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);
@@ -1378,7 +1395,7 @@ 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
@@ -1403,12 +1420,12 @@ 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)

pngread.c

@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -46,7 +46,7 @@ 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_malloc_ptr)malloc_fn, (png_voidp)mem_ptr)) == NULL)
 #else
    if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL)
 #endif
@@ -54,6 +54,10 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
       return (png_structp)NULL;
    }
 
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */
+#endif
+
 #ifdef PNG_SETJMP_SUPPORTED
 #ifdef USE_FAR_KEYWORD
    if (setjmp(jmpbuf))
@@ -92,6 +96,7 @@ 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'))
      {
         png_error(png_ptr,
@@ -99,15 +104,17 @@ png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
      }
 
      /* 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. */
+        info_ptr->free_me member.  Libpng-1.0.1 and earlier were not
+        compatible due to insertion of the user transform function. Note
+        to maintainer: this test can be removed from version 1.2.0 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')
+     if (user_png_ver[0] == '1' && user_png_ver[2] == '0' &&
+         (user_png_ver[4] <  '2' || user_png_ver[4] == '6') &&
+         user_png_ver[5] == '\0')
      {
         png_error(png_ptr,
-           "Application must be recompiled; version 1.0.6 was incompatible");
+        "Application must be recompiled; versions <= 1.0.6 were incompatible");
      }
    }
 
@@ -144,18 +151,42 @@ 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, "1.0.0", 0, 0);
 }
 
+#undef png_read_init_2
 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(sizeof(png_struct) > png_struct_size)
+     {
+       png_ptr->error_fn=(png_error_ptr)NULL;
+       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=(png_error_ptr)NULL;
+       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 +194,28 @@ 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=(png_error_ptr)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));
 
@@ -715,7 +746,7 @@ 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 1.0.9rc2
+ * [*] png_handle_alpha() does not exist yet, as of libpng version 1.2.0beta3
  */
 
 void PNGAPI
@@ -764,7 +795,7 @@ 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 1.0.9rc2
+ * [*] png_handle_alpha() does not exist yet, as of libpng version 1.2.0beta3
  */
 void PNGAPI
 png_read_image(png_structp png_ptr, png_bytepp image)
@@ -994,6 +1025,7 @@ 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");
@@ -1009,6 +1041,7 @@ 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);
@@ -1020,7 +1053,8 @@ 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
@@ -1033,7 +1067,8 @@ 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
@@ -1043,7 +1078,8 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
    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
@@ -1052,7 +1088,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
 }
 
 /* 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
@@ -1305,7 +1341,7 @@ 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);
 
@@ -1317,13 +1353,15 @@ 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);
@@ -1332,7 +1370,7 @@ 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

@@ -1,7 +1,7 @@
 
 /* pngrio.c - functions for data input
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -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

pngrtran.c

@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

pngrutil.c

@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -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;
@@ -220,7 +220,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
                    png_ptr->zbuf_size - png_ptr->zstream.avail_out;
                text = (png_charp)png_malloc(png_ptr, text_size + 1);
                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;
             }
@@ -332,59 +332,6 @@ 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 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
 
    /* set internal variables */
    png_ptr->width = width;
@@ -392,7 +339,9 @@ 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)
@@ -449,6 +398,13 @@ 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)
    {
@@ -565,9 +521,7 @@ 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);
@@ -628,7 +582,11 @@ 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)
@@ -1129,7 +1087,7 @@ 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))
    {
@@ -1159,7 +1117,8 @@ 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;
@@ -1716,8 +1675,8 @@ 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(png_ptr, png_strlen(ep) + 1);
+   png_memcpy(swidth, ep, (png_size_t)png_strlen(ep));
 #endif
 #endif
 
@@ -1734,8 +1693,8 @@ 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(png_ptr, png_strlen(ep) + 1);
+   png_memcpy(sheight, ep, (png_size_t)png_strlen(ep));
 #endif
 #endif
 
@@ -1908,7 +1867,7 @@ 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);
-   slength = (png_size_t)length;
+     slength = (png_size_t)length;
    png_crc_read(png_ptr, (png_bytep)chunkdata, slength);
    if (png_crc_finish(png_ptr, 0))
    {
@@ -2082,7 +2041,7 @@ 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
@@ -2102,12 +2061,12 @@ 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)
@@ -2131,8 +2090,7 @@ 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
 }
 
@@ -2371,6 +2329,10 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
 
 #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)
 {
@@ -2589,9 +2551,7 @@ png_do_read_interlace(png_structp png_ptr)
          (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 /* !PNG_HAVE_ASSEMBLER_READ_INTERLACE */
@@ -3008,6 +2968,9 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
       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);
+#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

@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -109,9 +109,10 @@ png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
    info_ptr->int_gamma = (int)(file_gamma*100000.+.5);
 #endif
    info_ptr->valid |= PNG_INFO_gAMA;
+   if(file_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)
@@ -127,7 +128,10 @@ png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
    info_ptr->int_gamma = int_gamma;
 #endif
    info_ptr->valid |= PNG_INFO_gAMA;
+   if(int_gamma == 0)
+      png_warning(png_ptr, "Setting gamma=0");
 }
+#endif
 
 #if defined(PNG_hIST_SUPPORTED)
 void PNGAPI
@@ -139,8 +143,11 @@ png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p 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.");
+          "Palette size 0, hIST allocation skipped.");
+       return;
+   }
 
 #ifdef PNG_FREE_ME_SUPPORTED
    png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
@@ -172,6 +179,61 @@ 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;
@@ -248,6 +310,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
 
    info_ptr->pcal_params = (png_charpp)png_malloc(png_ptr,
       (png_uint_32)((nparams + 1) * sizeof(png_charp)));
+
    info_ptr->pcal_params[nparams] = NULL;
 
    for (i = 0; i < nparams; i++)
@@ -302,7 +365,7 @@ 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;
@@ -349,7 +412,7 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
 #endif
    png_ptr->palette = (png_colorp)png_zalloc(png_ptr, (uInt)num_palette,
       sizeof (png_color));
-   memcpy(png_ptr->palette, palette, num_palette * sizeof (png_color));
+   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;
 
@@ -472,9 +535,9 @@ 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);
@@ -543,7 +606,7 @@ 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);
@@ -557,11 +620,11 @@ 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].key != 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;
@@ -573,7 +636,7 @@ 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
@@ -591,8 +654,9 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
 
       textp->key = (png_charp)png_malloc(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);
+      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));
@@ -676,8 +740,9 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
 #ifdef PNG_FREE_ME_SUPPORTED
        png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
 #endif
-       png_ptr->trans = info_ptr->trans = png_malloc(png_ptr, num_trans);
-       memcpy(info_ptr->trans, trans, num_trans);
+       png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
+           num_trans);
+       png_memcpy(info_ptr->trans, trans, num_trans);
 #ifdef PNG_FREE_ME_SUPPORTED
        info_ptr->free_me |= PNG_FREE_TRNS;
 #else
@@ -719,12 +784,12 @@ 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;
     }
@@ -738,7 +803,7 @@ 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)
@@ -840,8 +905,8 @@ 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,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_free(png_ptr, png_ptr->chunk_list);
@@ -883,7 +948,6 @@ 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
 
@@ -894,8 +958,6 @@ 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;
 }
@@ -907,3 +969,58 @@ png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
       info_ptr->valid &= ~(mask);
 }
 
+
+#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 */

pngtest.c

@@ -1,7 +1,7 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -51,16 +51,20 @@
 #endif
 
 #if defined(PNG_NO_STDIO)
-#if defined(_WIN32_WCE)
-typedef HANDLE                png_FILE_p;
-#else
-typedef FILE                * png_FILE_p;
-#endif
+#  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
@@ -279,7 +283,7 @@ 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
@@ -484,14 +488,15 @@ png_debug_malloc(png_structp png_ptr, png_uint_32 size)
    /* 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,
+         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. */
@@ -533,7 +538,7 @@ 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;
@@ -564,8 +569,17 @@ 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;
@@ -620,6 +634,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
    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,
@@ -631,13 +646,14 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 #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
@@ -650,8 +666,10 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
    {
       fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
       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);
@@ -660,6 +678,7 @@ 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))
@@ -670,7 +689,9 @@ 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);
@@ -678,29 +699,38 @@ 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
    {
+#ifdef PNG_WRITE_SUPPORTED
       png_set_write_status_fn(write_ptr, NULL);
+#endif
       png_set_read_status_fn(read_ptr, NULL);
    }
 
@@ -984,32 +1014,29 @@ 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
@@ -1024,7 +1051,16 @@ 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++)
       {
+#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);
@@ -1036,6 +1072,12 @@ 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 */
       }
    }
 
@@ -1098,7 +1140,9 @@ 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)
@@ -1112,11 +1156,20 @@ 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);
@@ -1458,4 +1511,4 @@ main(int argc, char *argv[])
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_9rc2 your_png_h_is_not_version_1_0_9rc2;
+typedef version_1_2_0beta3 your_png_h_is_not_version_1_2_0beta3;

pngtrans.c

@@ -1,7 +1,7 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -392,11 +392,12 @@ 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 +412,12 @@ 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

@@ -2,14 +2,14 @@
  *
  * For Intel x86 CPU and Microsoft Visual C++ compiler
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * Copyright (c) 1998, Intel Corporation
  *
  * Contributed by Nirav Chhatrapati, Intel Corporation, 1998
  * Interface to libpng contributed by Gilles Vollant, 1999
- * Debugging and cleanup by Greg Roelofs, 2000, 2001
+ *
  *
  * 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
@@ -19,6 +19,8 @@
  *
  * [png_read_filter_row_mmx_avg() bpp == 2 bugfix, GRR 20000916]
  *
+ * [runtime MMX configuration, GRR 20010102]
+ *
  */
 
 #define PNG_INTERNAL
@@ -110,6 +112,8 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
    png_debug(1,"in png_combine_row_asm\n");
 
    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();
    }
 
@@ -300,7 +304,8 @@ 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;
@@ -400,7 +405,8 @@ 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;
@@ -520,7 +526,8 @@ 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
                {
@@ -651,7 +658,8 @@ 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
                {
@@ -785,7 +793,8 @@ 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;
@@ -975,6 +984,8 @@ png_do_read_interlace(png_structp png_ptr)
    png_debug(1,"in png_do_read_interlace\n");
 
    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();
    }
 
@@ -1175,7 +1186,8 @@ png_do_read_interlace(png_structp png_ptr)
             // NOTE:  there is NO MMX code for 48-bit and 64-bit images
 
             // use MMX routine if machine supports it
-            if ( mmx_supported )
+            if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE)
+                /* && mmx_supported */ )
             {
                if (pixel_bytes == 3)
                {
@@ -3637,6 +3649,8 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
 #endif
 
    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();
    }
 
@@ -3646,13 +3660,17 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
    {
       case 0: sprintf(filnm, "none");
          break;
-      case 1: sprintf(filnm, "sub-%s", "MMX");
+      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-%s", "MMX");
+      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-%s", "MMX");
+      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-%s", "MMX");
+      case 4: sprintf(filnm, "Paeth-%s",
+        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":"x86");
          break;
       default: sprintf(filnm, "unknw");
          break;
@@ -3670,9 +3688,9 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
 
       case PNG_FILTER_VALUE_SUB:
       {
-         if (
-             (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
-             (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
+         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);
          }
@@ -3695,9 +3713,9 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
 
       case PNG_FILTER_VALUE_UP:
       {
-         if (
-             (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
-             (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
+         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);
          }
@@ -3719,9 +3737,9 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
 
       case PNG_FILTER_VALUE_AVG:
       {
-         if (
-             (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
-             (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
+         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);
          }
@@ -3753,9 +3771,9 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
 
       case PNG_FILTER_VALUE_PAETH:
       {
-         if (
-             (row_info->pixel_depth >= PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT) &&
-             (row_info->rowbytes >= PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT))
+         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);
          }

pngwio.c

@@ -1,7 +1,7 @@
 
 /* pngwio.c - functions for data output
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -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
@@ -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

@@ -1,7 +1,7 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -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,
@@ -443,7 +444,7 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
    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_malloc_ptr)malloc_fn, (png_voidp)mem_ptr)) == NULL)
 #else
    if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL)
 #endif /* PNG_USER_MEM_SUPPORTED */
@@ -451,6 +452,10 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
       return ((png_structp)NULL);
    }
 
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */
+#endif
+
 #ifdef PNG_SETJMP_SUPPORTED
 #ifdef USE_FAR_KEYWORD
    if (setjmp(jmpbuf))
@@ -488,6 +493,7 @@ 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'))
      {
         png_error(png_ptr,
@@ -495,15 +501,17 @@ png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
      }
 
      /* 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. */
+        info_ptr->free_me member.  Libpng-1.0.1 and earlier were not
+        compatible due to insertion of the user transform function. Note
+        to maintainer: this test can be removed from version 1.2.0 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')
+     if (user_png_ver[0] == '1' && user_png_ver[2] == '0' &&
+         (user_png_ver[4] <  '2' || user_png_ver[4] == '6') &&
+         user_png_ver[5] == '\0')
      {
         png_error(png_ptr,
-           "Application must be recompiled; version 1.0.6 was incompatible");
+        "Application must be recompiled; versions <= 1.0.6 were incompatible");
      }
    }
 
@@ -528,13 +536,36 @@ 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, "1.0.0", 0, 0);
 }
 
+#undef png_write_init_2
 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(sizeof(png_struct) > png_struct_size)
+     {
+       png_ptr->error_fn=(png_error_ptr)NULL;
+       png_error(png_ptr,
+         "The png struct allocated by the application is too small.");
+     }
+   if(sizeof(png_info) > png_info_size)
+     {
+       png_ptr->error_fn=(png_error_ptr)NULL;
+       png_error(png_ptr,
+         "The info struct allocated by the application 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
@@ -546,41 +577,46 @@ 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=(png_error_ptr)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));
 
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+   png_init_mmx_flags(png_ptr);   /* 1.2.0 addition */
+#endif
+
 #ifdef PNG_SETJMP_SUPPORTED
    /* restore jump buffer */
    png_memcpy(png_ptr->jmpbuf, tmp_jmp, sizeof (jmp_buf));
 #endif
 
+   png_set_write_fn(png_ptr, NULL, NULL, 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,
@@ -875,6 +911,7 @@ 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");
@@ -903,7 +940,8 @@ 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
@@ -914,7 +952,8 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
    {
       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
@@ -924,7 +963,7 @@ png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)
 
 
 /* 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
@@ -1137,12 +1176,11 @@ 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] =
@@ -1172,10 +1210,10 @@ 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++)
@@ -1359,7 +1397,8 @@ 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

@@ -1,7 +1,7 @@
 
 /* pngwtran.c - transforms the data in a row for PNG writers
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -10,6 +10,7 @@
 
 #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.
@@ -559,3 +560,4 @@ png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
    }
 }
 #endif /* PNG_MNG_FEATURES_SUPPORTED */
+#endif /* PNG_WRITE_SUPPORTED */

pngwutil.c

@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * libpng 1.0.9rc2 - January 22, 2001
+ * libpng 1.2.0beta3 - May 18, 2001
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -10,6 +10,7 @@
 
 #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
@@ -234,8 +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
@@ -284,7 +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
@@ -434,7 +435,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
 #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 ||
        color_type == PNG_COLOR_TYPE_RGB_ALPHA) &&
       (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) &&
 #endif
@@ -459,7 +460,9 @@ 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;
 
@@ -538,16 +541,23 @@ 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;
@@ -728,7 +738,7 @@ 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);
@@ -1414,9 +1424,9 @@ 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
@@ -1431,7 +1441,7 @@ 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);
@@ -1483,11 +1493,11 @@ 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);
 }
@@ -1505,15 +1515,15 @@ 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);
 }
@@ -2631,3 +2641,4 @@ 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 1.0.9rc2 (January 22, 2001) and zlib
+libpng 1.2.0beta3 (May 18, 2001) and zlib
 
 Copyright (C) 2000 Simon-Pierre Cadieux
 For conditions of distribution and use, see copyright notice in png.h
@@ -24,12 +24,12 @@ 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)
-   libpng1.dll         (C + Assembler version)
-   libpng1.dll         (C + Assembler debug version)
-   libpng1.dll         (C code debug version)
-   libpng1[c,e-m].dll   (reserved for official versions) 
-   libpng1[n-z].dll     (available for private versions)
+   libpng3.dll          (default version, currently C code only)
+   libpng3.dll         (C + Assembler version)
+   libpng3.dll         (C + Assembler debug version)
+   libpng3.dll         (C code debug version)
+   libpng3[c,e-m].dll   (reserved for official versions) 
+   libpng3[n-z].dll     (available for private versions)
    zlib.dll             (default version, currently C code only)
    zlibd.dll            (debug version)
 

projects/msvc/libpng.dsp

@@ -56,7 +56,7 @@ 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\libpng3.dll"
 # SUBTRACT LINK32 /pdb:none
 
 !ELSEIF  "$(CFG)" == "libpng - Win32 DLL Debug"
@@ -84,7 +84,7 @@ 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\libpng3d.dll"
 
 !ELSEIF  "$(CFG)" == "libpng - Win32 DLL ASM"
 
@@ -111,7 +111,7 @@ 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\libpng3a.dll"
 # SUBTRACT LINK32 /pdb:none
 
 !ELSEIF  "$(CFG)" == "libpng - Win32 DLL Debug ASM"
@@ -139,7 +139,7 @@ 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_dbga\libpng1b.dll"
+# ADD LINK32 /nologo /dll /debug /machine:I386 /out:".\win32\libpng\dll_dbga\libpng3b.dll"
 
 !ELSEIF  "$(CFG)" == "libpng - Win32 LIB"
 

projects/msvc/png32ms.def

@@ -6,7 +6,7 @@ LIBRARY
 DESCRIPTION "PNG image compression library for Windows"
 
 EXPORTS
-;Version 1.0.9rc2
+;Version 1.2.0beta3
   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
@@ -168,10 +170,12 @@ 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
@@ -180,7 +184,30 @@ EXPORTS
   png_init_io    @171
   png_convert_to_rfc1123     @172
   png_set_invalid  @173
-;To be added at version 1.2.0
-; png_permit_mng_features  @174
-;To be added at version 1.2.0
-; png_mmx_support  @175
+; 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

projects/wince/READMEE.WCE

@@ -8,9 +8,9 @@ libpng for WindowsCE Rel.1.0
 
 Introduction
 ============
-This is libpng 1.0.9rc2 ported to WindowsCE 2.0 and 2.11.
-libpng 1.0.9rc2 is a PNG reference library.
-See README, a document of original libpng 1.0.9rc2.
+This is libpng 1.2.0beta3 ported to WindowsCE 2.0 and 2.11.
+libpng 1.2.0beta3 is a PNG reference library.
+See README, a document of original libpng 1.2.0beta3.
 
 zlib for WindowsCE
 ==================
@@ -23,7 +23,7 @@ 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 1.0.9rc2, for conditions
+See README and LICENSE, documents of original libpng 1.2.0beta3, for conditions
 of use and distribution.
 
 Files

projects/wince/READMEJ.WCE

@@ -24,7 +24,7 @@ libpng
 <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
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-<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 1.0.9rc2<EFBFBD><EFBFBD>
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projects/wince/png32ce.def

@@ -5,7 +5,7 @@
 LIBRARY lpngce
 
 EXPORTS
-;Version 1.0.9rc2
+;Version 1.2.0beta3
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3
@@ -82,6 +82,7 @@ EXPORTS
   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
@@ -167,19 +168,44 @@ 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_libpng_ver    @170
   png_init_io    @171
   png_convert_to_rfc1123     @172
   png_set_invalid  @173
-;To be added at version 1.2.0
-; png_permit_mng_features  @174
-;To be added at version 1.2.0
-; png_mmx_support  @175
+; 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

scripts/makefile.aix

@@ -15,10 +15,10 @@ AR = ar rcs
 RANLIB = ranlib
 RM = rm -f
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
+# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
 # have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9rc2
+PNGMAJ = 3
+PNGMIN = 1.2.0beta3
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local

scripts/makefile.beos

@@ -10,10 +10,10 @@ CC=gcc
 ZLIBLIB=/usr/local/lib
 ZLIBINC=/usr/local/include
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
+# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
 # have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9rc2
+PNGMAJ = 3
+PNGMIN = 1.2.0beta3
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 ALIGN=

scripts/makefile.cygwin

@@ -35,13 +35,13 @@ WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
 CFLAGS=-I$(ZLIBINC) -Wall -O3 $(ALIGN) -funroll-loops \
 	-fomit-frame-pointer
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
+# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
 # have to change it.
-PNGMAJ = 2
-#PNGDLL = $DLLNUM% # msvc
-PNGDLL = 2         # cygwin 1.0.9rc2
-PNGMIN = 1.0.9rc2
-PNGMIN_BASE = 1.0.9
+PNGMAJ = 3
+#PNGDLL = $3# msvc
+PNGDLL = 2# cygwin 1.2.0beta3
+PNGMIN = 1.2.0beta3
+PNGMIN_BASE = 1.2.0
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(PNGDLL).dll
@@ -107,8 +107,9 @@ $(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

scripts/makefile.dec

@@ -14,10 +14,10 @@ LIBPATH=$(prefix)/lib
 ZLIBLIB=../zlib
 ZLIBINC=../zlib
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
+# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
 # have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9rc2
+PNGMAJ = 3
+PNGMIN = 1.2.0beta3
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 CC=cc
@@ -64,7 +64,7 @@ install: libpng.a libpng.so.$(PNGVER)
 	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); \
+	(cd $(LIBPATH); ln -f -s libpng.so.$(PNGVER) libpng.so.$(PNGMAJ); \
 	 ln -f -s libpng.so.$(PNGMAJ) libpng.so)
 
 clean:

scripts/makefile.gcmmx

@@ -48,10 +48,10 @@ 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
+# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
 # have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9rc2
+PNGMAJ = 3
+PNGMIN = 1.2.0beta3
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 INCPATH=$(prefix)/include

scripts/makefile.hpgcc

@@ -0,0 +1,112 @@
+# makefile for libpng on HP-UX using GCC
+# 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
+
+# where "make install" puts libpng.a, libpng.so*, 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
+
+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,$(ZLIBLIB) -lpng -lz -lm
+LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
+
+RANLIB=ranlib
+#RANLIB=echo
+
+# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
+# have to change it.
+PNGMAJ = 3
+PNGMIN = 1.2.0beta3
+PNGVER = $(PNGMAJ).$(PNGMIN)
+
+INCPATH=$(prefix)/include
+LIBPATH=$(prefix)/lib
+
+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 libpng.sl pngtest
+
+libpng.a: $(OBJS)
+	ar rc $@ $(OBJS)
+	$(RANLIB) $@
+
+libpng.sl: libpng.sl.$(PNGMAJ)
+	ln -f -s libpng.sl.$(PNGMAJ) libpng.sl
+
+libpng.sl.$(PNGMAJ): libpng.sl.$(PNGVER)
+	ln -f -s libpng.sl.$(PNGVER) libpng.sl.$(PNGMAJ)
+
+libpng.sl.$(PNGVER): $(OBJSDLL)
+	$(LD) -b -L$(ZLIBLIB) +s +b $(ZLIBLIB) \
+	+h libpng.sl.$(PNGMAJ) -o libpng.sl.$(PNGVER) $(OBJSDLL) -lz
+
+pngtest: pngtest.o libpng.sl
+	$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
+
+test: pngtest
+	./pngtest
+
+install: libpng.a libpng.sl.$(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 $(INCPATH)/pngconf.h
+	cp libpng.a libpng.sl.$(PNGVER) $(LIBPATH)
+	chmod 755 $(LIBPATH)/libpng.sl.$(PNGVER)
+	-@/bin/rm -f $(LIBPATH)/libpng.sl.$(PNGMAJ) $(LIBPATH)/libpng.sl
+	(cd $(LIBPATH); ln -sf libpng.sl.$(PNGVER) libpng.sl.$(PNGMAJ); \
+	 ln -sf libpng.sl.$(PNGMAJ) libpng.sl)
+
+clean:
+	/bin/rm -f *.o libpng.a libpng.sl* pngtest pngout.png
+
+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

@@ -10,15 +10,16 @@ ZLIBINC=/opt/zlib/include
 
 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
 
 RANLIB=ranlib
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
+# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
 # have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9rc2
+PNGMAJ = 3
+PNGMIN = 1.2.0beta3
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # where make install puts libpng.a and png.h

scripts/makefile.linux

@@ -31,10 +31,10 @@ LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng -lz -lm
 RANLIB=ranlib
 #RANLIB=echo
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
+# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
 # have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9rc2
+PNGMAJ = 3
+PNGMIN = 1.2.0beta3
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 INCPATH=$(prefix)/include

scripts/makefile.netbsd

@@ -0,0 +1,42 @@
+# makefile for libpng for NetBSD for the standard
+# make obj && make depend && make && make test
+# make includes && make install
+# Copyright (C) 2001 Patrick R.L. Welche
+# For conditions of distribution and use, see copyright notice in png.h
+
+LOCALBASE?=/usr/local
+LIBDIR=	${LOCALBASE}/lib
+MANDIR= ${LOCALBASE}/man
+INCSDIR=${LOCALBASE}/include
+
+LIB=png
+SHLIB_MAJOR= 3
+SHLIB_MINOR= 1.2.0beta3
+SRCS=	pnggccrd.c 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
+INCS=	png.h pngconf.h
+MAN=	libpng.3 libpngpf.3 png.5
+
+CPPFLAGS+=-I${.CURDIR} -DPNG_USE_PNGGCCRD
+
+CPPFLAGS+=-DPNG_NO_ASSEMBLER_CODE
+# something like this for mmx assembler, but it core dumps for me at the moment
+# .if ${MACHINE_ARCH} == "i386"
+#   MKLINT= no
+# .else
+#   CPPFLAGS+=-DPNG_NO_ASSEMBLER_CODE
+# .endif
+
+CLEANFILES+=pngtest.o pngtest
+
+pngtest.o:	pngtest.c
+	${CC} -c ${CPPFLAGS} ${CFLAGS} ${.ALLSRC} -o ${.TARGET}
+
+pngtest:	pngtest.o libpng.a
+	${CC} ${LDFLAGS} ${.ALLSRC} -o${.TARGET} -lz -lm
+
+test:	pngtest
+	cd ${.CURDIR} && ${.OBJDIR}/pngtest
+
+.include <bsd.lib.mk>

scripts/makefile.sco

@@ -22,10 +22,10 @@ LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
 #RANLIB=ranlib
 RANLIB=echo
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
+# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
 # have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9rc2
+PNGMAJ = 3
+PNGMIN = 1.2.0beta3
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 INCPATH=$(prefix)/include

scripts/makefile.sggcc

@@ -19,8 +19,8 @@ CFLAGS=-I$(ZLIBINC) -O2 $(WARNMORE) -fPIC -mabi=n32
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
 LDSHARED=gcc -shared
 
-VER=1.0.9rc2
-LIBS=libpng.so.1.0.9rc2
+VER=1.2.0beta3
+LIBS=libpng.so.1.2.0beta3
 SHAREDLIB=libpng.so
 libdir=$(prefix)/lib32
 
@@ -59,12 +59,12 @@ install: libpng.a
 	cp libpng.a $(prefix)/lib
 	chmod 644 $(prefix)/lib/libpng.a
 	cp $(SHAREDLIB).$(VER) $(libdir); chmod 755 $(SHAREDLIB).$(VER)
-	cd $(libdir); if test -f $(SHAREDLIB).$(VER); then \
+	(cd $(libdir); if test -f $(SHAREDLIB).$(VER); then \
 	rm -f $(SHAREDLIB) $(SHAREDLIB).1; \
 	ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB); \
 	ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB).1; \
 	(ldconfig || true)  >/dev/null 2>&1; \
-	fi
+	fi)
 
 clean:
 	rm -f *.o libpng.a pngtest pngout.png

scripts/makefile.sgi

@@ -20,11 +20,12 @@ CC=cc
 WARNMORE=-fullwarn
 # You can add the -n32 option; then zlib must also be compiled with -n32
 # Note: -KPIC is the default anyhow
-CFLAGS=-I$(ZLIBINC) -O $(WARNMORE) -KPIC # -g -DPNG_DEBUG=5
+#CFLAGS=-I$(ZLIBINC) -O $(WARNMORE) -KPIC -DPNG_USE_PNGGCCRD # -g -DPNG_DEBUG=5
+CFLAGS=-I$(ZLIBINC) -O $(WARNMORE) -DPNG_USE_PNGGCCRD -DPNG_NO_ASSEMBLER_CODE
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
 LDSHARED=cc -shared
 
-VER=1.0.9rc2
+VER=1.2.0beta3
 SONUM=2
 SHAREDLIB=libpng.so
 libdir=$(prefix)
@@ -33,7 +34,7 @@ libdir=$(prefix)
 RANLIB=echo
 #RANLIB=ranlib
 
-OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
+OBJS = pnggccrd.o 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
 
@@ -68,15 +69,15 @@ install: libpng.a
 	chmod 644 $(prefix)/lib/libpng.a
 
 install-shared: $(SHAREDLIB).$(SONUM).$(VER)
-	cp $(SHAREDLIB).$(SONUM).$(VER) $(libdir); 
+	cp $(SHAREDLIB).$(SONUM).$(VER) $(libdir)
 	chmod 755 $(SHAREDLIB).$(SONUM).$(VER)
-	cd $(libdir);
-	rm -f $(SHAREDLIB) $(SHAREDLIB).$(SONUM);
-	ln -s $(SHAREDLIB).$(SONUM).$(VER) $(SHAREDLIB).$(SONUM);
-	ln -s $(SHAREDLIB).$(SONUM) $(SHAREDLIB);
+	(cd $(libdir)
+	rm -f $(SHAREDLIB) $(SHAREDLIB).$(SONUM)
+	ln -s $(SHAREDLIB).$(SONUM).$(VER) $(SHAREDLIB).$(SONUM)
+	ln -s $(SHAREDLIB).$(SONUM) $(SHAREDLIB))
 
 clean:
-	rm -f *.o libpng.a pngtest pngout.png $(SHAREDLIB).* 
+	rm -f *.o libpng.a pngtest pngout.png $(SHAREDLIB).*
 
 DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
 writelock:
@@ -100,4 +101,5 @@ pngwrite.o: png.h pngconf.h
 pngwtran.o: png.h pngconf.h
 pngwutil.o: png.h pngconf.h
 pngpread.o: png.h pngconf.h
+pnggccrd.o: png.h pngconf.h
 

scripts/makefile.solaris

@@ -28,10 +28,10 @@ LDFLAGS=-L. -R. -L$(ZLIBLIB) -R$(ZLIBLIB) -lpng -lz -lm
 #RANLIB=ranlib
 RANLIB=echo
 
-# read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
+# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
 # have to change it.
-PNGMAJ = 2
-PNGMIN = 1.0.9rc2
+PNGMAJ = 3
+PNGMIN = 1.2.0beta3
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 INCPATH=$(prefix)/include

scripts/pngdef.pas

@@ -1,12 +1,14 @@
 unit pngdef;
 
-// Caution: this file is probably out of date.
+// Caution: this file has fallen out of date since version 1.0.5.  Write to
+// png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu about bringing
+// it up to date.
 
 interface
 
 const
-  PNG_LIBPNG_VER_STRING = '1.0.9rc2';
-  PNG_LIBPNG_VER        =  10009;
+  PNG_LIBPNG_VER_STRING = '1.2.0beta3';
+  PNG_LIBPNG_VER        =  10200;
 
 type
   png_uint_32 = Cardinal;

scripts/pngos2.def

@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Caution: This file is probably out of date.
+; Version 1.2.0beta3
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
@@ -10,284 +10,196 @@ CODE		PRELOAD MOVEABLE DISCARDABLE
 DATA		PRELOAD MOVEABLE MULTIPLE
 
 EXPORTS
-  png_set_sig_bytes
-  png_sig_cmp
+
+
+  png_build_grayscale_palette
   png_check_sig
-  png_create_read_struct
-; png_create_read_struct_2
-  png_create_write_struct
-; png_create_write_struct_2
-  png_write_chunk
-  png_write_chunk_start
-  png_write_chunk_data
-  png_write_chunk_end
-  png_create_info_struct
-  png_info_init
-  png_write_info
-  png_write_info_before_PLTE
-  png_read_info
-  png_convert_to_rfc1123
+  png_chunk_error
+  png_chunk_warning
   png_convert_from_struct_tm
   png_convert_from_time_t
-  png_set_expand
+  png_create_info_struct
+  png_create_read_struct
+  png_create_write_struct
+  png_data_freer
+  png_destroy_info_struct
+  png_destroy_read_struct
+  png_destroy_write_struct
+  png_error
+  png_free
+  png_free_data
+  png_get_IHDR
+  png_get_PLTE
+  png_get_bKGD
+  png_get_bit_depth
+  png_get_cHRM
+  png_get_cHRM_fixed
+  png_get_channels
+  png_get_color_type
+  png_get_compression_buffer_size
+  png_get_compression_type
+  png_get_copyright
+  png_get_error_ptr
+  png_get_filter_type
+  png_get_gAMA
+  png_get_gAMA_fixed
+  png_get_hIST
+  png_get_header_ver
+  png_get_header_version
+  png_get_iCCP
+  png_get_image_height
+  png_get_image_width
+  png_get_interlace_type
+  png_get_io_ptr
+  png_get_libpng_ver
+  png_get_oFFs
+  png_get_pCAL
+  png_get_pHYs
+  png_get_pixel_aspect_ratio
+  png_get_pixels_per_meter
+  png_get_progressive_ptr
+  png_get_rgb_to_gray_status
+  png_get_rowbytes
+  png_get_rows
+  png_get_sBIT
+  png_get_sCAL
+  png_get_sPLT
+  png_get_sRGB
+  png_get_signature
+  png_get_tIME
+  png_get_tRNS
+  png_get_text
+  png_get_unknown_chunks
+  png_get_user_chunk_ptr
+  png_get_user_transform_ptr
+  png_get_valid
+  png_get_x_offset_microns
+  png_get_x_offset_pixels
+  png_get_x_pixels_per_meter
+  png_get_y_offset_microns
+  png_get_y_offset_pixels
+  png_get_y_pixels_per_meter
+  png_malloc
+  png_memcpy_check
+  png_memset_check
+  png_permit_empty_plte
+  png_process_data
+  png_progressive_combine_row
+  png_read_end
+  png_read_image
+  png_read_info
+  png_read_init ; deprecated
+  png_read_png
+  png_read_row
+  png_read_rows
+  png_read_update_info
+  png_reset_zstream
+  png_set_IHDR
+  png_set_PLTE
+  png_set_bKGD
+  png_set_background
   png_set_bgr
+  png_set_cHRM
+  png_set_cHRM_fixed
+  png_set_compression_buffer_size
+  png_set_compression_level
+  png_set_compression_mem_level
+  png_set_compression_method
+  png_set_compression_strategy
+  png_set_compression_window_bits
+  png_set_crc_action
+  png_set_dither
+  png_set_error_fn
+  png_set_expand
+  png_set_filler
+  png_set_filter
+  png_set_filter_heuristics
+  png_set_flush
+  png_set_gAMA
+  png_set_gAMA_fixed
+  png_set_gamma
+  png_set_gray_1_2_4_to_8
   png_set_gray_to_rgb
+  png_set_hIST
+  png_set_iCCP
+  png_set_interlace_handling
+  png_set_invert_alpha
+  png_set_invert_mono
+  png_set_keep_unknown_chunks
+  png_set_oFFs
+  png_set_pCAL
+  png_set_pHYs
+  png_set_packing
+  png_set_packswap
+  png_set_palette_to_rgb
+  png_set_progressive_read_fn
+  png_set_read_fn
+  png_set_read_status_fn
+  png_set_read_user_chunk_fn
+  png_set_read_user_transform_fn
   png_set_rgb_to_gray
   png_set_rgb_to_gray_fixed
   png_set_rows
-  png_build_grayscale_palette
-  png_set_strip_alpha
-  png_set_swap_alpha
-  png_set_invalid
-  png_set_invert_alpha
-  png_set_filler
-  png_set_swap
-  png_set_packing
-  png_set_packswap
-  png_set_shift
-  png_set_interlace_handling
-  png_set_invert_mono
-  png_set_background
-  png_set_strip_16
-  png_set_dither
-  png_set_gamma
-  png_set_flush
-  png_set_user_chunk_fn
-  png_write_flush
-  png_start_read_image
-  png_read_update_info
-  png_read_rows
-  png_read_row
-  png_read_image
-  png_write_row
-  png_write_rows
-  png_write_image
-  png_write_end
-  png_read_end
-  png_destroy_info_struct
-  png_destroy_read_struct
-  png_read_destroy
-  png_destroy_write_struct
-; png_write_destroy_info
-  png_write_destroy
-  png_set_crc_action
-  png_set_filter
-  png_set_filter_heuristics
-  png_set_compression_level
-  png_set_compression_mem_level
-  png_set_compression_strategy
-  png_set_compression_window_bits
-  png_set_compression_method
-  png_init_io
-  png_get_copyright
-  png_set_error_fn
-  png_get_error_ptr
-  png_get_header_ver
-  png_get_header_version
-  png_get_libpng_ver
-  png_get_user_chunk_ptr
-; png_get_mem_fn
-; png_set_mem_fn
-  png_set_write_fn
-  png_set_read_fn
-  png_set_write_status_fn
-  png_set_read_status_fn
-  png_get_io_ptr
-  png_set_progressive_read_fn
-  png_set_read_status_fn
-  png_set_read_user_transform_fn
-  png_set_write_status_fn
-  png_set_write_user_transform_fn
-  png_get_progressive_ptr
-  png_process_data
-  png_progressive_combine_row
-  png_malloc
-  png_free
-  png_memcpy_check
-  png_memset_check
-; png_malloc_default
-; png_free_default
-; png_far_to_near
-  png_error
-  png_chunk_error
-  png_warning
-  png_chunk_warning
-  png_get_valid
-  png_get_rowbytes
-  png_get_channels
-  png_get_image_width
-  png_get_image_height
-  png_get_bit_depth
-  png_get_color_type
-  png_get_filter_type
-  png_get_interlace_type
-  png_get_compression_type
-  png_get_pixels_per_meter
-  png_get_pixel_aspect_ratio
-  png_get_rgb_to_gray_status
-  png_get_rows
-  png_get_x_offset_pixels
-  png_get_y_offset_pixels
-  png_get_x_offset_microns
-  png_get_y_offset_microns
-  png_get_signature
-  png_get_bKGD
-  png_set_bKGD
-  png_get_cHRM
-  png_set_cHRM
-  png_set_cHRM_fixed
-  png_get_gAMA
-  png_set_gAMA
-  png_set_gAMA_fixed
-  png_get_hIST
-  png_set_hIST
-  png_get_IHDR
-  png_set_IHDR
-  png_get_oFFs
-  png_set_oFFs
-  png_get_pCAL
-  png_set_pCAL
-  png_get_pHYs
-  png_set_pHYs
-  png_get_PLTE
-  png_set_PLTE
-  png_get_sBIT
   png_set_sBIT
-  png_get_sRGB
+  png_set_sCAL
+  png_set_sPLT
   png_set_sRGB
   png_set_sRGB_gAMA_and_cHRM
-  png_get_text
-  png_set_text
-  png_get_tIME
+  png_set_shift
+  png_set_sig_bytes
+  png_set_strip_16
+  png_set_strip_alpha
+  png_set_swap
+  png_set_swap_alpha
   png_set_tIME
-  png_get_tRNS
   png_set_tRNS
-  png_set_gray_1_2_4_to_8
   png_set_tRNS_to_alpha
-  png_set_palette_to_rgb
+  png_set_text
+  png_set_unknown_chunk_location
+  png_set_unknown_chunks
+  png_set_user_transform_info
+  png_set_write_fn
+  png_set_write_status_fn
+  png_set_write_user_transform_fn
+  png_sig_cmp
+  png_start_read_image
+  png_warning
+  png_write_chunk
+  png_write_chunk_data
+  png_write_chunk_end
+  png_write_chunk_start
+  png_write_end
+  png_write_flush
+  png_write_image
+  png_write_info
+  png_write_info_before_PLTE
+  png_write_init ; deprecated
+  png_write_png
+  png_write_row
+  png_write_rows
+  png_read_init_2
+  png_write_init_2
+  png_access_version_number
+  png_init_io
+  png_convert_to_rfc1123
+  png_set_invalid
 
-  png_create_struct
-  png_destroy_struct
-  png_info_destroy
-  png_zalloc
-  png_zfree
-  png_reset_crc
-  png_write_data
-  png_read_data
-  png_crc_read
-  png_crc_finish
-  png_crc_error
-  png_calculate_crc
-  png_flush
-  png_save_uint_32
-  png_save_int_32
-  png_save_uint_16
-  png_write_sig
-  png_write_IHDR
-  png_write_PLTE
-  png_write_IDAT
-  png_write_IEND
-  png_write_bKGD
-  png_write_cHRM
-  png_write_gAMA
-  png_write_hIST
-  png_write_iCCP
-  png_write_iTXt
-  png_write_oFFs
-  png_write_pCAL
-  png_write_pHYs
-  png_write_sBIT
-  png_write_sCAL
-  png_write_sPLT
-  png_write_sRGB
-  png_check_keyword
-  png_write_tEXt
-  png_write_tIME
-  png_write_tRNS
-  png_write_zTXt
-  png_write_finish_row
-  png_write_start_row
-  png_build_gamma_table
-  png_combine_row
-  png_do_read_interlace
-  png_do_write_interlace
-  png_read_filter_row
-  png_write_find_filter
-  png_write_filtered_row
-  png_read_finish_row
-  png_read_start_row
-  png_read_transform_info
-  png_do_read_filler
-  png_do_read_swap_alpha
-  png_do_write_swap_alpha
-  png_do_read_invert_alpha
-  png_do_write_invert_alpha
-  png_do_strip_filler
-  png_do_swap
-  png_do_packswap
-  png_do_rgb_to_gray
-  png_do_gray_to_rgb
-  png_do_unpack
-  png_do_unshift
-  png_do_invert
-  png_do_chop
-  png_do_dither
-; png_correct_palette
-  png_do_bgr
-  png_do_pack
-  png_do_shift
-  png_do_background
-  png_do_gamma
-  png_do_expand_palette
-  png_do_expand
-  png_handle_IHDR
-  png_handle_PLTE
-  png_handle_IEND
-  png_handle_bKGD
-  png_handle_cHRM
-  png_handle_gAMA
-  png_handle_hIST
-  png_handle_iCCP
-  png_handle_iTXt
-  png_handle_oFFs
-  png_handle_pCAL
-  png_handle_pHYs
-  png_handle_sBIT
-  png_handle_sCAL
-  png_handle_sPLT
-  png_handle_sRGB
-  png_handle_tEXt
-  png_handle_tIME
-  png_handle_tRNS
-  png_handle_zTXt
-  png_handle_unknown
-  png_check_chunk_name
-  png_do_read_transformations
-  png_do_write_transformations
-  png_init_read_transformations
-  png_push_read_chunk
-  png_push_read_sig
-; png_push_check_crc
-  png_push_crc_skip
-  png_push_crc_finish
-  png_push_fill_buffer
-  png_push_save_buffer
-  png_push_restore_buffer
-  png_push_read_IDAT
-  png_process_IDAT_data
-  png_push_process_row
-  png_push_handle_unknown
-  png_push_have_info
-  png_push_have_end
-  png_push_have_row
-; png_push_read_end
-  png_process_some_data
-  png_read_push_finish_row
-  png_push_handle_tEXt
-  png_push_read_tEXt
-  png_push_handle_zTXt
-  png_push_read_zTXt
+;To be added at version 1.2.0
+; png_permit_mng_features
 
+; Added at version 1.2.0:
+  png_mmx_support
+  png_permit_empty_plte
+  png_permit_mng_features
+  png_get_mmx_flagmask
+  png_get_asm_flagmask
+  png_get_asm_flags
+  png_get_mmx_bitdepth_threshold
+  png_get_mmx_rowbytes_threshold
+  png_set_asm_flags
+  png_init_mmx_flags
+
+; These are not present when libpng is compiled with PNG_NO_GLOBAL_ARRAYS
   png_libpng_ver
   png_pass_start
   png_pass_inc
@@ -297,13 +209,8 @@ EXPORTS
   png_pass_dsp_mask
 ; png_pass_width
 ; png_pass_height
-  png_get_iCCP
-  png_get_sCAL
-  png_get_sPLT
-  png_set_iCCP
-  png_set_sPLT
-  png_free_data
 
+; These are not present when libpng is compiled with PNG_NO_GLOBAL_ARRAYS
   png_IHDR
   png_IDAT
   png_IEND
@@ -325,6 +232,3 @@ EXPORTS
   png_tIME
   png_tRNS
   png_zTXt
-
-  png_mmx_supported
-  png_permit_empty_plte