Imported from libpng-1.0.7beta14.tar

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.0.7beta11 - May 6, 2000
+Libpng 1.0.7beta14 - May 17, 2000
 
 This is a public release of libpng, intended for use in production codes.
 
@@ -57,9 +57,24 @@ Changes since the last public release (1.0.6):
   Overloaded png_read_init() and png_write_init() with macros that convert
     calls to png_read_init_2() or png_write_init_2() that check the version
     and structure sizes.
-  In png_set_text, check if old application had allocated the png_text structure;
-    if so, only allow one text chunk to be processed to avoid memory overrun.
+  Made PNG_NO_ITXT_SUPPORTED the default setting, to avoid memory overrun
+    when old applications fill the info_ptr->text structure directly.
   Added PNGAPI macro, and added it to the definitions of all exported functions.
+  Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
+  Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.
+  Added png_access_version_number() function.
+  Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
+  Expanded libpng.3/libpng.txt information about png_data_freer().
+  Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
+    warnings instead of errors, as pngrutil.c does.
+  Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
+    will actually write IDATs.
+  Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.
+  Make png_free_data() ignore its final parameter when freeing data that can
+    have multiple instances (text, sPLT, unknowns).
+  Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
+  Added png_set_invalid() function.
+  Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
 
 Send comments/corrections/commendations to
 png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu

CHANGES

@@ -729,14 +729,35 @@ version 1.0.6j [May 3, 2000]
   Overloaded png_read_init() and png_write_init() with macros that convert
     calls to png_read_init_2() or png_write_init_2() that check the version
     and structure sizes.
-version 1.0.7beta11 [May 6, 2000]
+version 1.0.7beta11 [May 7, 2000]
   Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
     which are no longer used.
   Eliminated the three new members of png_text when PNG_NO_iTXt_SUPPORTED
     or PNG_LEGACY_SUPPORTED is defined.
-  In png_set_text, check if old application had allocated the png_text structure;
-    if so, only allow one text chunk to be processed to avoid memory overrun.
+  Made PNG_NO_ITXT_SUPPORTED the default setting, to avoid memory overrun
+    when old applications fill the info_ptr->text structure directly.
   Added PNGAPI macro, and added it to the definitions of all exported functions.
+version 1.0.7beta12 [May 12, 2000]
+  Revised pngset.c to avoid a problem with expanding the png_debug macro.
+  Deleted some extraneous defines from pngconf.h
+  Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
+  Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.
+  Added png_access_version_number() function.
+  Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
+  Expanded libpng.3/libpng.txt information about png_data_freer().
+version 1.0.7beta13 [May 16, 2000]
+  Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
+    warnings instead of errors, as pngrutil.c does.
+  Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
+    will actually write IDATs.
+  Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.
+  Make png_free_data() ignore its final parameter when freeing data that can
+    have multiple instances (text, sPLT, unknowns).
+version 1.0.7beta14 [May 17, 2000]
+  Fixed a new bug in png_set_rows().
+  Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
+  Added png_set_invalid() function.
+  Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
 
 Send comments/corrections/commendations to
 png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu

INSTALL

@@ -1,5 +1,5 @@
 
-Installing libpng version 1.0.7beta11 - May 6, 2000
+Installing libpng version 1.0.7beta14 - May 17, 2000
 
 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-1.0.7beta11" or "lpng106" and "zlib-1.1.3"
+might be called "libpng-1.0.7beta14" or "lpng106" and "zlib-1.1.3"
 or "zlib113") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
@@ -47,8 +47,8 @@ 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.2.1.0.7beta11)
- makefile.gcmmx    =>  Linux/ELF makefile (gcc, creates libpng.so.2.1.0.7beta11,
+ makefile.linux    =>  Linux/ELF makefile (gcc, creates libpng.so.2.1.0.7beta14)
+ makefile.gcmmx    =>  Linux/ELF makefile (gcc, creates libpng.so.2.1.0.7beta14,
                        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
@@ -57,11 +57,12 @@ include
  makefile.dec      =>  DEC Alpha UNIX makefile
  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.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
- makefile.sggcc    =>  Silicon Graphics (gcc, creates libpng.so.2.1.0.7beta11)
+ makefile.sggcc    =>  Silicon Graphics (gcc, creates libpng.so.2.1.0.7beta14)
  makefile.sunos    =>  Sun makefile
- makefile.solaris  =>  Solaris 2.X makefile (gcc, creates libpng.so.2.1.0.7beta11)
+ makefile.solaris  =>  Solaris 2.X makefile (gcc, creates libpng.so.2.1.0.7beta14)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.mips     =>  MIPS makefile
  makefile.acorn    =>  Acorn makefile

LICENSE

@@ -5,7 +5,7 @@ Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
 Copyright (c) 1996, 1997 Andreas Dilger
 (libpng versions 0.90, December 1996, through 0.96, May 1997)
 Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
-(libpng versions 0.97, January 1998, through 1.0.7beta11, May 6, 2000)
+(libpng versions 0.97, January 1998, through 1.0.7beta14, May 17, 2000)
 
 For the purposes of this copyright and license, "Contributing Authors"
 is defined as the following set of individuals:
@@ -68,4 +68,4 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 randeg@alum.rpi.edu
-May 6, 2000
+May 17, 2000

README

@@ -1,4 +1,4 @@
-README for libpng 1.0.7beta11 - May 6, 2000 (shared library 2.1)
+README for libpng 1.0.7beta14 - May 17, 2000 (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.
@@ -172,9 +172,9 @@ 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.2.1.0.7beta11)
+                            (gcc, creates libpng.so.2.1.0.7beta14)
        makefile.gcmmx   =>  Linux/ELF makefile (gcc, creates
-                            libpng.so.2.1.0.7beta11, uses assembler code
+                            libpng.so.2.1.0.7beta14, 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
@@ -183,12 +183,13 @@ Files in this distribution:
        makefile.dec     =>  DEC Alpha UNIX makefile
        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.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
-       makefile.sggcc   =>  Silicon Graphics (gcc, creates libpng.so.2.1.0.7beta11)
+       makefile.sggcc   =>  Silicon Graphics (gcc, creates libpng.so.2.1.0.7beta14)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng.so.2.1.0.7beta11)
+                            (gcc, creates libpng.so.2.1.0.7beta14)
        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:
    =========================
 
-      May 6, 2000
+      May 17, 2000
 
       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 1.0.7beta11 are Y2K compliant.  It is my belief that earlier
+      upward through 1.0.7beta14 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-1.0.7beta11.  Instead, please
+  There is no \"configure\" script for Libpng-1.0.7beta14.  Instead, please
   copy the appropriate makefile for your system from the \"scripts\"
   directory.  Read the INSTALL file for more details.
 "

example.c

@@ -566,7 +566,7 @@ void write_png(char *file_name /* , ... other image information ... */)
    {
       /* If we get here, we had a problem reading the file */
       fclose(fp);
-      png_destroy_write_struct(&png_ptr,  (png_infopp)info_ptr);
+      png_destroy_write_struct(&png_ptr, &info_ptr);
       return;
    }
 
@@ -762,7 +762,7 @@ void write_png(char *file_name /* , ... other image information ... */)
    png_free(png_ptr, trans);
 
    /* clean up after the write, and free any memory allocated */
-   png_destroy_write_struct(&png_ptr, (png_infopp)info_ptr);
+   png_destroy_write_struct(&png_ptr, &info_ptr);
 
    /* close the file */
    fclose(fp);

libpng.3

@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "May 6, 2000"
+.TH LIBPNG 3 "May 17, 2000"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.7beta11
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.7beta14
 .SH SYNOPSIS
 \fI\fB
 
@@ -8,6 +8,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.7beta11
 
 \fI\fB
 
+\fBpng_uint_32 png_access_version_number \fI(void\fP\fB);\fP
+
+\fI\fB
+
 \fBint png_check_sig (png_bytep \fP\fIsig\fP\fB, int \fInum\fP\fB);\fP
 
 \fI\fB
@@ -484,6 +488,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.0.7beta11
 
 \fI\fB
 
+\fBvoid png_set_invalid (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, int \fImask\fP\fB);\fP
+
+\fI\fB
+
 \fBvoid png_set_invert_alpha (png_structp \fIpng_ptr\fP\fB);\fP
 
 \fI\fB
@@ -739,7 +747,7 @@ 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 1.0.7beta11 - May 6, 2000
+ libpng version 1.0.7beta14 - May 17, 2000
  Updated and distributed by Glenn Randers-Pehrson
  <randeg@alum.rpi.edu>
  Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@@ -1291,7 +1299,7 @@ into the info_ptr is returned for any complex types.
     text_ptr[i].key   - keyword for comment.  Must contain
                          1-79 characters.
     text_ptr[i].text  - text comments for current
-                         keyword.  Can empty.
+                         keyword.  Can be empty.
     text_ptr[i].text_length - length of text string,
                  after decompression, 0 for iTXt
     text_ptr[i].itxt_length - length of itxt string,
@@ -1918,20 +1926,22 @@ When you are done, you can free all memory allocated by libpng like this:
        &end_info);
 
 It is also possible to individually free the info_ptr members that
-point to libpng-allocated storage with the following functions:
+point to libpng-allocated storage with the following function:
 
     png_free_data(png_ptr, info_ptr, mask, n)
-    mask         - identifies data to be freed, a mask
-                   containing the logical OR of one or more of
-                   PNG_FREE_PLTE, PNG_FREE_TRNS,
-                   PNG_FREE_HIST, PNG_FREE_ICCP,
-                   PNG_FREE_SPLT, PNG_FREE_ROWS,
-                   PNG_FREE_TEXT, PNG_FREE_UNKN,
-                   or simply PNG_FREE_ALL
-    n            - sequence number of item to be freed
-                   (-1 for all items)
+    mask - identifies data to be freed, a mask
+           containing the logical OR of one or
+           more of
+             PNG_FREE_PLTE, PNG_FREE_TRNS,
+             PNG_FREE_HIST, PNG_FREE_ICCP,
+             PNG_FREE_PCAL, PNG_FREE_ROWS,
+             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
+           (-1 for all items)
 
-These functions may be safely called when the relevant storage has
+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
@@ -1945,12 +1955,12 @@ or so that it will free data that was allocated by the user with png_malloc()
 or png_zalloc() and passed in via a png_set_*() function, with
 
     png_data_freer(png_ptr, info_ptr, freer, mask)
-    mask     - which data elements are affected
-               same choices as in png_free_data()
-    freer    - one of
-                 PNG_DESTROY_WILL_FREE_DATA
-                 PNG_SET_WILL_FREE_DATA
-                 PNG_USER_WILL_FREE_DATA
+    mask   - which data elements are affected
+             same choices as in png_free_data()
+    freer  - one of
+               PNG_DESTROY_WILL_FREE_DATA
+               PNG_SET_WILL_FREE_DATA
+               PNG_USER_WILL_FREE_DATA
 
 This function only affects data that has already been allocated.
 You can call this function after reading the PNG data but before calling
@@ -1959,13 +1969,40 @@ function is responsible for freeing any existing data that might be present,
 and again after the png_set_*() functions to control whether the user
 or png_destroy_*() is supposed to free the data.  When the user assumes
 responsibility for libpng-allocated data, the application must use
-png_free() to free it.
+png_free() to free it, and when the user transfers responsibility to libpng
+for data that the user has allocated, the user must have used png_malloc()
+or png_zalloc() to allocate it (the png_zalloc() function is the same
+as png_malloc() except that it also zeroes the newly-allocated memory).
 
 If you allocated your row_pointers in a single block, as suggested above in
 the description of the high level read interface, you must not transfer
 responsibility for freeing it to the png_set_rows or png_read_destroy function,
 because they would also try to free the individual row_pointers[i].
 
+If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword
+separately, do not transfer responsibility for freeing text_ptr to libpng,
+because when libpng fills a png_text structure it combines these members with
+the key member, and png_free_data() will free only text_ptr.key.  Similarly,
+if you transfer responsibility for free'ing text_ptr from libpng to your
+application, your application must not separately free those members.
+
+The png_free_data() function will turn off the "valid" flag for anything
+it frees.  If you need to turn the flag off for a chunk that was freed by your
+application instead of by libpng, you can use
+
+    png_set_invalid(png_ptr, info_ptr, mask);
+    mask - identifies the chunks to be made invalid,
+           containing the logical OR of one or
+           more of 
+             PNG_INFO_gAMA, PNG_INFO_sBIT,
+             PNG_INFO_cHRM, PNG_INFO_PLTE,
+             PNG_INFO_tRNS, PNG_INFO_bKGD,
+             PNG_INFO_hIST, PNG_INFO_pHYs,
+             PNG_INFO_oFFs, PNG_INFO_tIME,
+             PNG_INFO_pCAL, PNG_INFO_sRGB,
+             PNG_INFO_iCCP, PNG_INFO_sPLT,
+             PNG_INFO_sCAL, PNG_INFO_IDAT
+
 For a more compact example of reading a PNG image, see the file example.c.
 
 .SS Reading PNG files progressively
@@ -2606,7 +2643,8 @@ transformations are permitted, enabled by the following masks.
     PNG_TRANSFORM_SWAP_ENDIAN   Byte-swap 16-bit samples
     PNG_TRANSFORM_STRIP_FILLER  Strip out filler bytes.
 
-If you have valid image data in the info structure, simply do this:
+If you have valid image data in the info structure (you can use
+png_set_rows() to put image data in the info structure), simply do this:
 
     png_write_png(png_ptr, info_ptr, png_transforms, NULL)
 
@@ -2863,20 +2901,22 @@ When you are done, you can free all memory used by libpng like this:
     png_destroy_write_struct(&png_ptr, &info_ptr);
 
 It is also possible to individually free the info_ptr members that
-point to libpng-allocated storage with the following functions:
+point to libpng-allocated storage with the following function:
 
     png_free_data(png_ptr, info_ptr, mask, n)
-    mask         - identifies data to be freed, a mask
-                   containing the logical OR of one or more of
-                   PNG_FREE_PLTE, PNG_FREE_TRNS,
-                   PNG_FREE_HIST, PNG_FREE_ICCP,
-                   PNG_FREE_SPLT, PNG_FREE_ROWS,
-                   PNG_FREE_TEXT, PNG_FREE_UNKN,
-                   or simply PNG_FREE_ALL
-    n            - sequence number of item to be freed
-                   (-1 for all items)
+    mask  - identifies data to be freed, a mask
+            containing the logical OR of one or
+            more of
+              PNG_FREE_PLTE, PNG_FREE_TRNS,
+              PNG_FREE_HIST, PNG_FREE_ICCP,
+              PNG_FREE_PCAL, PNG_FREE_ROWS,
+              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
+            (-1 for all items)
 
-These functions may be safely called when the relevant storage has
+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
@@ -2894,12 +2934,12 @@ or so that it will free data that was allocated by the user with png_malloc()
 or png_zalloc() and passed in via a png_set_*() function, with
 
     png_data_freer(png_ptr, info_ptr, freer, mask)
-    mask     - which data elements are affected
-               same choices as in png_free_data()
-    freer    - one of
-                 PNG_DESTROY_WILL_FREE_DATA
-                 PNG_SET_WILL_FREE_DATA
-                 PNG_USER_WILL_FREE_DATA
+    mask   - which data elements are affected
+             same choices as in png_free_data()
+    freer  - one of
+               PNG_DESTROY_WILL_FREE_DATA
+               PNG_SET_WILL_FREE_DATA
+               PNG_USER_WILL_FREE_DATA
 
 For example, to transfer responsibility for some data from a read structure
 to a write structure, you could use
@@ -2921,8 +2961,17 @@ This function only affects data that has already been allocated.
 You can call this function before calling after the png_set_*() functions
 to control whether the user or png_destroy_*() is supposed to free the data.
 When the user assumes responsibility for libpng-allocated data, the
-application must use png_free() to free it.
+application must use
+png_free() to free it, and when the user transfers responsibility to libpng
+for data that the user has allocated, the user must have used png_malloc()
+or png_zalloc() to allocate it.
 
+If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword
+separately, do not transfer responsibility for freeing text_ptr to libpng,
+because when libpng fills a png_text structure it combines these members with
+the key member, and png_free_data() will free only text_ptr.key.  Similarly,
+if you transfer responsibility for free'ing text_ptr from libpng to your
+application, your application must not separately free those members.
 For a more compact example of writing a PNG image, see the file example.c.
 
 .SH V. Modifying/Customizing libpng:
@@ -3312,15 +3361,29 @@ png_set_error_fn(), which is essentially the same function, but with a new
 name to force compilation errors with applications that try to use the old
 method.
 
+Starting with version 1.0.7, you can find out which version of the library
+you are using at run-time:
+
+   png_uint_32 libpng_vn = png_access_version_number();
+
+The number libpng_vn is constructed from the major version, minor
+version with leading zero, and release number with leading zero,
+(e.g., libpng_vn for version 1.0.7 is 10007).
+
+You can also check which version of png.h you used when compiling your
+application:
+
+   png_uint_32 application_vn = PNG_LIBPNG_VER;
+
 .SH VII. Y2K Compliance in libpng
 
-May 6, 2000
+May 17, 2000
 
 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 1.0.7beta11 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.7beta14 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
@@ -3461,7 +3524,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.0.7beta11 - May 6, 2000:
+Libpng version 1.0.7beta14 - May 17, 2000:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (randeg@alum.rpi.edu).
 
@@ -3476,7 +3539,7 @@ Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
 Copyright (c) 1996, 1997 Andreas Dilger
 (libpng versions 0.89c, May 1996, through 0.96, May 1997)
 Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
-(libpng versions 0.97, January 1998, through 1.0.7beta11, May 6, 2000)
+(libpng versions 0.97, January 1998, through 1.0.7beta14, May 17, 2000)
 
 For the purposes of this copyright and license, "Contributing Authors"
 is defined as the following set of individuals:

libpng.txt

@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.0.7beta11 - May 6, 2000
+ libpng version 1.0.7beta14 - May 17, 2000
  Updated and distributed by Glenn Randers-Pehrson
  <randeg@alum.rpi.edu>
  Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@@ -552,7 +552,7 @@ into the info_ptr is returned for any complex types.
     text_ptr[i].key   - keyword for comment.  Must contain
                          1-79 characters.
     text_ptr[i].text  - text comments for current
-                         keyword.  Can empty.
+                         keyword.  Can be empty.
     text_ptr[i].text_length - length of text string,
                  after decompression, 0 for iTXt
     text_ptr[i].itxt_length - length of itxt string,
@@ -1179,20 +1179,22 @@ When you are done, you can free all memory allocated by libpng like this:
        &end_info);
 
 It is also possible to individually free the info_ptr members that
-point to libpng-allocated storage with the following functions:
+point to libpng-allocated storage with the following function:
 
     png_free_data(png_ptr, info_ptr, mask, n)
-    mask         - identifies data to be freed, a mask
-                   containing the logical OR of one or more of
-                   PNG_FREE_PLTE, PNG_FREE_TRNS,
-                   PNG_FREE_HIST, PNG_FREE_ICCP,
-                   PNG_FREE_SPLT, PNG_FREE_ROWS,
-                   PNG_FREE_TEXT, PNG_FREE_UNKN,
-                   or simply PNG_FREE_ALL
-    n            - sequence number of item to be freed
-                   (-1 for all items)
+    mask - identifies data to be freed, a mask
+           containing the logical OR of one or
+           more of
+             PNG_FREE_PLTE, PNG_FREE_TRNS,
+             PNG_FREE_HIST, PNG_FREE_ICCP,
+             PNG_FREE_PCAL, PNG_FREE_ROWS,
+             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
+           (-1 for all items)
 
-These functions may be safely called when the relevant storage has
+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
@@ -1206,12 +1208,12 @@ or so that it will free data that was allocated by the user with png_malloc()
 or png_zalloc() and passed in via a png_set_*() function, with
 
     png_data_freer(png_ptr, info_ptr, freer, mask)
-    mask     - which data elements are affected
-               same choices as in png_free_data()
-    freer    - one of
-                 PNG_DESTROY_WILL_FREE_DATA
-                 PNG_SET_WILL_FREE_DATA
-                 PNG_USER_WILL_FREE_DATA
+    mask   - which data elements are affected
+             same choices as in png_free_data()
+    freer  - one of
+               PNG_DESTROY_WILL_FREE_DATA
+               PNG_SET_WILL_FREE_DATA
+               PNG_USER_WILL_FREE_DATA
 
 This function only affects data that has already been allocated.
 You can call this function after reading the PNG data but before calling
@@ -1220,13 +1222,40 @@ function is responsible for freeing any existing data that might be present,
 and again after the png_set_*() functions to control whether the user
 or png_destroy_*() is supposed to free the data.  When the user assumes
 responsibility for libpng-allocated data, the application must use
-png_free() to free it.
+png_free() to free it, and when the user transfers responsibility to libpng
+for data that the user has allocated, the user must have used png_malloc()
+or png_zalloc() to allocate it (the png_zalloc() function is the same
+as png_malloc() except that it also zeroes the newly-allocated memory).
 
 If you allocated your row_pointers in a single block, as suggested above in
 the description of the high level read interface, you must not transfer
 responsibility for freeing it to the png_set_rows or png_read_destroy function,
 because they would also try to free the individual row_pointers[i].
 
+If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword
+separately, do not transfer responsibility for freeing text_ptr to libpng,
+because when libpng fills a png_text structure it combines these members with
+the key member, and png_free_data() will free only text_ptr.key.  Similarly,
+if you transfer responsibility for free'ing text_ptr from libpng to your
+application, your application must not separately free those members.
+
+The png_free_data() function will turn off the "valid" flag for anything
+it frees.  If you need to turn the flag off for a chunk that was freed by your
+application instead of by libpng, you can use
+
+    png_set_invalid(png_ptr, info_ptr, mask);
+    mask - identifies the chunks to be made invalid,
+           containing the logical OR of one or
+           more of 
+             PNG_INFO_gAMA, PNG_INFO_sBIT,
+             PNG_INFO_cHRM, PNG_INFO_PLTE,
+             PNG_INFO_tRNS, PNG_INFO_bKGD,
+             PNG_INFO_hIST, PNG_INFO_pHYs,
+             PNG_INFO_oFFs, PNG_INFO_tIME,
+             PNG_INFO_pCAL, PNG_INFO_sRGB,
+             PNG_INFO_iCCP, PNG_INFO_sPLT,
+             PNG_INFO_sCAL, PNG_INFO_IDAT
+
 For a more compact example of reading a PNG image, see the file example.c.
 
 Reading PNG files progressively
@@ -1867,7 +1896,8 @@ transformations are permitted, enabled by the following masks.
     PNG_TRANSFORM_SWAP_ENDIAN   Byte-swap 16-bit samples
     PNG_TRANSFORM_STRIP_FILLER  Strip out filler bytes.
 
-If you have valid image data in the info structure, simply do this:
+If you have valid image data in the info structure (you can use
+png_set_rows() to put image data in the info structure), simply do this:
 
     png_write_png(png_ptr, info_ptr, png_transforms, NULL)
 
@@ -2124,20 +2154,22 @@ When you are done, you can free all memory used by libpng like this:
     png_destroy_write_struct(&png_ptr, &info_ptr);
 
 It is also possible to individually free the info_ptr members that
-point to libpng-allocated storage with the following functions:
+point to libpng-allocated storage with the following function:
 
     png_free_data(png_ptr, info_ptr, mask, n)
-    mask         - identifies data to be freed, a mask
-                   containing the logical OR of one or more of
-                   PNG_FREE_PLTE, PNG_FREE_TRNS,
-                   PNG_FREE_HIST, PNG_FREE_ICCP,
-                   PNG_FREE_SPLT, PNG_FREE_ROWS,
-                   PNG_FREE_TEXT, PNG_FREE_UNKN,
-                   or simply PNG_FREE_ALL
-    n            - sequence number of item to be freed
-                   (-1 for all items)
+    mask  - identifies data to be freed, a mask
+            containing the logical OR of one or
+            more of
+              PNG_FREE_PLTE, PNG_FREE_TRNS,
+              PNG_FREE_HIST, PNG_FREE_ICCP,
+              PNG_FREE_PCAL, PNG_FREE_ROWS,
+              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
+            (-1 for all items)
 
-These functions may be safely called when the relevant storage has
+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
@@ -2155,12 +2187,12 @@ or so that it will free data that was allocated by the user with png_malloc()
 or png_zalloc() and passed in via a png_set_*() function, with
 
     png_data_freer(png_ptr, info_ptr, freer, mask)
-    mask     - which data elements are affected
-               same choices as in png_free_data()
-    freer    - one of
-                 PNG_DESTROY_WILL_FREE_DATA
-                 PNG_SET_WILL_FREE_DATA
-                 PNG_USER_WILL_FREE_DATA
+    mask   - which data elements are affected
+             same choices as in png_free_data()
+    freer  - one of
+               PNG_DESTROY_WILL_FREE_DATA
+               PNG_SET_WILL_FREE_DATA
+               PNG_USER_WILL_FREE_DATA
 
 For example, to transfer responsibility for some data from a read structure
 to a write structure, you could use
@@ -2182,8 +2214,17 @@ This function only affects data that has already been allocated.
 You can call this function before calling after the png_set_*() functions
 to control whether the user or png_destroy_*() is supposed to free the data.
 When the user assumes responsibility for libpng-allocated data, the
-application must use png_free() to free it.
+application must use
+png_free() to free it, and when the user transfers responsibility to libpng
+for data that the user has allocated, the user must have used png_malloc()
+or png_zalloc() to allocate it.
 
+If you allocated text_ptr.text, text_ptr.lang, and text_ptr.translated_keyword
+separately, do not transfer responsibility for freeing text_ptr to libpng,
+because when libpng fills a png_text structure it combines these members with
+the key member, and png_free_data() will free only text_ptr.key.  Similarly,
+if you transfer responsibility for free'ing text_ptr from libpng to your
+application, your application must not separately free those members.
 For a more compact example of writing a PNG image, see the file example.c.
 
 V. Modifying/Customizing libpng:
@@ -2573,15 +2614,29 @@ png_set_error_fn(), which is essentially the same function, but with a new
 name to force compilation errors with applications that try to use the old
 method.
 
+Starting with version 1.0.7, you can find out which version of the library
+you are using at run-time:
+
+   png_uint_32 libpng_vn = png_access_version_number();
+
+The number libpng_vn is constructed from the major version, minor
+version with leading zero, and release number with leading zero,
+(e.g., libpng_vn for version 1.0.7 is 10007).
+
+You can also check which version of png.h you used when compiling your
+application:
+
+   png_uint_32 application_vn = PNG_LIBPNG_VER;
+
 VII. Y2K Compliance in libpng
 
-May 6, 2000
+May 17, 2000
 
 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 1.0.7beta11 are Y2K compliant.  It is my belief that earlier
+upward through 1.0.7beta14 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

libpngpf.3

@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "May 6, 2000"
+.TH LIBPNGPF 3 "May 17, 2000"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.0.7beta11
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.7beta14
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP

png.5

@@ -1,4 +1,4 @@
-.TH PNG 5 "May 6, 2000"
+.TH PNG 5 "May 17, 2000"
 .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 1.0.7beta11 - May 6, 2000
+ * libpng version 1.0.7beta14 - May 17, 2000
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger
  * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@@ -14,14 +14,14 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_7beta11 Your_png_h_is_not_version_1_0_7beta11;
+typedef version_1_0_7beta14 Your_png_h_is_not_version_1_0_7beta14;
 
 /* 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 */
-char png_libpng_ver[12] = "1.0.7beta11";
+char png_libpng_ver[12] = "1.0.7beta14";
 
 /* png_sig was changed to a function in version 1.0.5c */
 /* Place to hold the signature string for a PNG file. */
@@ -289,108 +289,110 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, int num
 #if defined(PNG_TEXT_SUPPORTED)
 /* free text item num or (if num == -1) all text items */
 #ifdef PNG_FREE_ME_SUPPORTED
-if (mask & info_ptr->free_me & PNG_FREE_TEXT)
+if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_TEXT)
 #endif
 {
    if (num != -1)
    {
-     if (info_ptr->text[num].key)
+     if (info_ptr->text && info_ptr->text[num].key)
      {
          png_free(png_ptr, info_ptr->text[num].key);
          info_ptr->text[num].key = NULL;
      }
    }
-   else if (info_ptr->text != NULL)
+   else
    {
-     int i;
-     for (i = 0; i < info_ptr->num_text; i++)
-         png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
-     png_free(png_ptr, info_ptr->text);
-     info_ptr->text = NULL;
-     info_ptr->num_text=0;
+       int i;
+       for (i = 0; i < info_ptr->num_text; i++)
+           png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
+       png_free(png_ptr, info_ptr->text);
+       info_ptr->text = NULL;
+       info_ptr->num_text=0;
    }
 }
 #endif
 
 #if defined(PNG_tRNS_SUPPORTED)
 /* free any tRNS entry */
-if (mask & PNG_FREE_TRNS)
-{
-   if (info_ptr->valid & PNG_INFO_tRNS)
-   {
 #ifdef PNG_FREE_ME_SUPPORTED
-       if (info_ptr->free_me & PNG_FREE_TRNS)
+if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
 #else
-       if (png_ptr->flags & PNG_FLAG_FREE_TRNS)
+if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS))
 #endif
-         png_free(png_ptr, info_ptr->trans);
-       info_ptr->valid &= ~PNG_INFO_tRNS;
-   }
+{
+    png_free(png_ptr, info_ptr->trans);
+    info_ptr->valid &= ~PNG_INFO_tRNS;
 }
 #endif
 
 #if defined(PNG_sCAL_SUPPORTED)
 /* free any sCAL entry */
-{
-   if (info_ptr->valid & PNG_INFO_sCAL)
-   {
-#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
-       png_free(png_ptr, info_ptr->scal_s_width);
-       png_free(png_ptr, info_ptr->scal_s_height);
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_SCAL)
 #endif
-          info_ptr->valid &= ~PNG_INFO_sCAL;
-   }
+{
+#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
+    png_free(png_ptr, info_ptr->scal_s_width);
+    png_free(png_ptr, info_ptr->scal_s_height);
+#endif
+    info_ptr->valid &= ~PNG_INFO_sCAL;
 }
 #endif
 
 #if defined(PNG_pCAL_SUPPORTED)
 /* free any pCAL entry */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_PCAL)
+#endif
 {
-   if (info_ptr->valid & PNG_INFO_pCAL)
-   {
-       png_free(png_ptr, info_ptr->pcal_purpose);
-       png_free(png_ptr, info_ptr->pcal_units);
-       if (info_ptr->pcal_params != NULL)
-       {
-           int i;
-           for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
-             {
-             png_free(png_ptr, info_ptr->pcal_params[i]);
-             }
-           png_free(png_ptr, info_ptr->pcal_params);
-       }
-       info_ptr->valid &= ~PNG_INFO_pCAL;
-   }
+    png_free(png_ptr, info_ptr->pcal_purpose);
+    png_free(png_ptr, info_ptr->pcal_units);
+    if (info_ptr->pcal_params != NULL)
+    {
+        int i;
+        for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
+          png_free(png_ptr, info_ptr->pcal_params[i]);
+        png_free(png_ptr, info_ptr->pcal_params);
+    }
+    info_ptr->valid &= ~PNG_INFO_pCAL;
 }
 #endif
 
 #if defined(PNG_iCCP_SUPPORTED)
 /* free any iCCP entry */
-if (mask & PNG_FREE_ICCP)
-{
-   if (info_ptr->valid & PNG_INFO_iCCP)
-   {
 #ifdef PNG_FREE_ME_SUPPORTED
-       if (info_ptr->free_me & PNG_FREE_ICCP)
+if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_ICCP)
 #endif
-       {
-         png_free(png_ptr, info_ptr->iccp_name);
-         png_free(png_ptr, info_ptr->iccp_profile);
-       }
-       info_ptr->valid &= ~PNG_INFO_iCCP;
-   }
+{
+    png_free(png_ptr, info_ptr->iccp_name);
+    png_free(png_ptr, info_ptr->iccp_profile);
+    info_ptr->valid &= ~PNG_INFO_iCCP;
 }
 #endif
 
 #if defined(PNG_sPLT_SUPPORTED)
 /* free a given sPLT entry, or (if num == -1) all sPLT entries */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
+#else
 if (mask & PNG_FREE_SPLT)
+#endif
 {
    if (num != -1)
    {
-       png_free(png_ptr, info_ptr->splt_palettes[num].name);
-       png_free(png_ptr, info_ptr->splt_palettes[num].entries);
-       info_ptr->valid &= ~PNG_INFO_sPLT;
+      if(info_ptr->splt_palettes)
+      {
+          png_free(png_ptr, info_ptr->splt_palettes[num].name);
+          png_free(png_ptr, info_ptr->splt_palettes[num].entries);
+      }
    }
    else
    {
@@ -403,17 +405,25 @@ if (mask & PNG_FREE_SPLT)
          png_free(png_ptr, info_ptr->splt_palettes);
          info_ptr->splt_palettes_num = 0;
        }
+       info_ptr->valid &= ~PNG_INFO_sPLT;
    }
 }
 #endif
 
 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
+#else
 if (mask & PNG_FREE_UNKN)
+#endif
 {
    if (num != -1)
    {
-       png_free(png_ptr, info_ptr->unknown_chunks[num].data);
-       info_ptr->unknown_chunks[num].data = NULL;
+       if(info_ptr->unknown_chunks)
+       {
+          png_free(png_ptr, info_ptr->unknown_chunks[num].data);
+          info_ptr->unknown_chunks[num].data = NULL;
+       }
    }
    else
    {
@@ -433,56 +443,54 @@ if (mask & PNG_FREE_UNKN)
 
 #if defined(PNG_hIST_SUPPORTED)
 /* free any hIST entry */
-if (mask & PNG_FREE_HIST)
-{
-   if (info_ptr->valid & PNG_INFO_hIST)
-   {
 #ifdef PNG_FREE_ME_SUPPORTED
-       if (info_ptr->free_me & PNG_FREE_HIST)
+if ((mask & PNG_FREE_HIST)  & info_ptr->free_me)
 #else
-       if (png_ptr->flags & PNG_FLAG_FREE_HIST)
+if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST))
 #endif
-         png_free(png_ptr, info_ptr->hist);
-       info_ptr->valid &= ~PNG_INFO_hIST;
-   }
+{
+    png_free(png_ptr, info_ptr->hist);
+    info_ptr->valid &= ~PNG_INFO_hIST;
 }
 #endif
 
 /* free any PLTE entry that was internally allocated */
-if (mask & PNG_FREE_PLTE)
-{
-   if (info_ptr->valid & PNG_INFO_PLTE)
-   {
 #ifdef PNG_FREE_ME_SUPPORTED
-       if (info_ptr->free_me & PNG_FREE_PLTE)
+if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
 #else
-       if (png_ptr->flags & PNG_FLAG_FREE_PLTE)
+if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE))
 #endif
-          png_zfree(png_ptr, info_ptr->palette);
-       info_ptr->valid &= ~(PNG_INFO_PLTE);
-       info_ptr->num_palette = 0;
-   }
+{
+    png_zfree(png_ptr, info_ptr->palette);
+    info_ptr->valid &= ~PNG_INFO_PLTE;
+    info_ptr->num_palette = 0;
 }
 
 #if defined(PNG_INFO_IMAGE_SUPPORTED)
 /* free any image bits attached to the info structure */
-if (mask & PNG_FREE_ROWS)
-{
 #ifdef PNG_FREE_ME_SUPPORTED
-   if (info_ptr->free_me & PNG_FREE_ROWS)
+if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_ROWS)
 #endif
-   {
+{
+    if(info_ptr->row_pointers)
+    {
        int row;
-
        for (row = 0; row < (int)info_ptr->height; row++)
           png_free(png_ptr, info_ptr->row_pointers[row]);
        png_free(png_ptr, info_ptr->row_pointers);
-   }
+       info_ptr->row_pointers=NULL;
+    }
+    info_ptr->valid &= ~PNG_INFO_IDAT;
 }
 #endif
+
 #ifdef PNG_FREE_ME_SUPPORTED
    if(num == -1)
      info_ptr->free_me &= ~mask;
+   else
+     info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
 #endif
 }
 
@@ -583,7 +591,7 @@ png_charp PNGAPI
 png_get_copyright(png_structp png_ptr)
 {
    if (png_ptr != NULL || png_ptr == NULL)  /* silence compiler warning */
-   return ("\n libpng version 1.0.7beta11 - May 6, 2000\n\
+   return ("\n libpng version 1.0.7beta14 - May 17, 2000\n\
    Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.\n\
    Copyright (c) 1996, 1997 Andreas Dilger\n\
    Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson\n");
@@ -601,8 +609,8 @@ 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("1.0.7beta11");
-   return("1.0.7beta11");
+      return("1.0.7beta14");
+   return("1.0.7beta14");
 }
 
 png_charp PNGAPI
@@ -646,3 +654,10 @@ png_reset_zstream(png_structp png_ptr)
 {
    return (inflateReset(&png_ptr->zstream));
 }
+
+png_uint_32 PNGAPI
+png_access_version_number(void)
+{
+   /* Version of *.c files used when building libpng */
+   return((png_uint_32) 10007L);
+}

png.h

@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.0.7beta11 - May 6, 2000
+ * libpng version 1.0.7beta14 - May 17, 2000
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger
  * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@@ -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 1.0.7beta11 - May 6, 2000: Glenn
+ *  libpng versions 0.97, January 1998, through 1.0.7beta14 - May 17, 2000: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -52,10 +52,10 @@
  *    1.0.6h                        10007  10.6h (testing xy.z so-numbering)
  *    1.0.6i                        10007  10.6i
  *    1.0.6j                        10007  2.1.0.6j (incompatible with 1.0.0)
- *    1.0.7beta11                   10007  2.1.0.7beta11 (still compatible)
+ *    1.0.7beta11-12                10007  2.1.0.7beta11-12 (binary compatible)
+ *    1.0.7rc1                      10007  2.1.0.7rc1 (binary compatible)
  *    planned:
- *    1.0.7prep00                   10007  2.1.0.7prep00 (still compatible)
- *    1.0.6ptch04 (w/4 patches)     10006  2.1.0.6 (binary compatible)
+ *    1.0.6patch4 (w/4 patches)     10006  2.1.0.6 (binary compatible)
  *    1.0.7                         10007  (still compatible)
  *
  *    Henceforth the source version will match the shared-library major
@@ -66,7 +66,7 @@
  *    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 "-beta-nn" or "-pre-nn".
+ *    release number plus "betaNN" or "rcN".
  *
  *    Binary incompatibility exists only when applications make direct access
  *    to the info_ptr or png_ptr members through png.h, and the compiled
@@ -87,7 +87,7 @@
  * Copyright (c) 1996, 1997 Andreas Dilger
  * (libpng versions 0.89c, June 1996, through 0.96, May 1997)
  * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
- * (libpng versions 0.97, January 1998, through 1.0.7beta11, May 6, 2000)
+ * (libpng versions 0.97, January 1998, through 1.0.7beta14, May 17, 2000)
  *
  * For the purposes of this copyright and license, "Contributing Authors"
  * is defined as the following set of individuals:
@@ -162,13 +162,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    May 6, 2000
+ *    May 17, 2000
  *
  *    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 1.0.7beta11 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.0.7beta14 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
@@ -223,6 +223,30 @@
  * at the actual function definitions and structure components.
  */
 
+/* Version information for png.h - this should match the version in png.c */
+#define PNG_LIBPNG_VER_STRING "1.0.7beta14"
+
+#define PNG_LIBPNG_VER_SONUM   2
+
+/* 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 7
+/* This should match the numeric part of the final component of
+ * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
+#define PNG_LIBPNG_VER_BUILD   14
+
+/* 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 10007 /* 1.0.7 */
+
+/* Note to maintainer: update this number in scripts/pngdef.pas as well */
+
+#ifndef PNG_VERSION_INFO_ONLY
+
 /* include the compression library's header */
 #include "zlib.h"
 
@@ -245,18 +269,6 @@ extern "C" {
  * which applications aren't expected to use directly.
  */
 
-/* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.0.7beta11"
-
-/* 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=bugfix */
-#define PNG_LIBPNG_VER    10007  /* 1.0.7 */
-
-/* Note to maintainer: update this number in scripts/pngdef.pas as well */
-
 /* variables declared in png.c - only it needs to define PNG_NO_EXTERN */
 #if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN)
 /* Version information for C files, stored in png.c.  This had better match
@@ -1111,9 +1123,9 @@ struct png_struct_def
 };
 
 /* This prevents a compiler error in png_get_copyright() in png.c if png.c
-and png.h are both at * version 1.0.7beta11
+and png.h are both at * version 1.0.7beta14
  */
-typedef png_structp version_1_0_7beta11;
+typedef png_structp version_1_0_7beta14;
 
 typedef png_struct FAR * FAR * png_structpp;
 
@@ -1123,6 +1135,9 @@ typedef png_struct FAR * FAR * png_structpp;
  * a simple one line description of the use of each function.
  */
 
+/* Returns the version number of the library */
+extern PNG_EXPORT(png_uint_32,png_access_version_number) PNGARG((void));
+
 /* Tell lib we have already handled the first <num_bytes> magic bytes.
  * Handling more than 8 bytes from the beginning of the file is an error.
  */
@@ -1675,14 +1690,15 @@ extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr,
 #define PNG_FREE_ICCP 0x0010
 #define PNG_FREE_SPLT 0x0020
 #define PNG_FREE_ROWS 0x0040
-#define PNG_FREE_PCAL 0x0080 /* not used any more */
-#define PNG_FREE_SCAL 0x0100 /* not used any more */
+#define PNG_FREE_PCAL 0x0080
+#define PNG_FREE_SCAL 0x0100
 #define PNG_FREE_UNKN 0x0200
 #define PNG_FREE_LIST 0x0400
 #define PNG_FREE_PLTE 0x1000
 #define PNG_FREE_TRNS 0x2000
 #define PNG_FREE_TEXT 0x4000
-#define PNG_FREE_ALL  0x3fff
+#define PNG_FREE_ALL  0x7fff
+#define PNG_FREE_MUL  0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
 
 #ifdef PNG_USER_MEM_SUPPORTED
 extern PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr,
@@ -2061,6 +2077,12 @@ extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp
    png_ptr, png_infop info_ptr, png_unknown_chunkpp entries));
 #endif
 
+/* Png_free_data() will turn off the "valid" flag for anything it frees.
+   If you need to turn it off for a chunk that your application has freed,
+   you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); */
+extern PNG_EXPORT(void, png_set_invalid) PNGARG((png_structp png_ptr,
+   png_infop info_ptr, int mask));
+
 #if defined(PNG_INFO_IMAGE_SUPPORTED)
 /* The "params" pointer is currently not used and is for future expansion. */
 extern PNG_EXPORT(void, png_read_png) PNGARG((png_structp png_ptr,
@@ -2080,19 +2102,28 @@ extern PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr,
  */
 #ifdef PNG_DEBUG
 #if (PNG_DEBUG > 0)
+#if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
+#include <crtdbg.h>
+#define png_debug(l,m) if (PNG_DEBUG > l) _RPT0(_CRT_WARN,m)
+#define png_debug1(l,m,p1) if (PNG_DEBUG > l) _RPT1(_CRT_WARN,m,p1)
+#define png_debug2(l,m,p1,p2) if (PNG_DEBUG > l) _RPT2(_CRT_WARN,m,p1,p2)
+#else /* PNG_DEBUG_FILE || !_MSC_VER */
 #ifndef PNG_DEBUG_FILE
 #define PNG_DEBUG_FILE stderr
 #endif /* PNG_DEBUG_FILE */
-
-#define png_debug(l,m)        if (PNG_DEBUG > l) \
-                                 fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \
-                                    (l==2 ? "\t\t":(l>2 ? "\t\t\t":""))))
-#define png_debug1(l,m,p1)    if (PNG_DEBUG > l) \
-                                 fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \
-                                    (l==2 ? "\t\t":(l>2 ? "\t\t\t":""))),p1)
-#define png_debug2(l,m,p1,p2) if (PNG_DEBUG > l) \
-                                 fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \
-                                    (l==2 ? "\t\t":(l>2 ? "\t\t\t":""))),p1,p2)
+#define png_debug(l,m) \
+   if (PNG_DEBUG > l)  \
+     fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \
+       (l==2 ? "\t\t":(l>2 ? "\t\t\t":""))))
+#define png_debug1(l,m,p1) \
+   if (PNG_DEBUG > l) \
+     fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \
+       (l==2 ? "\t\t":(l>2 ? "\t\t\t":""))),p1)
+#define png_debug2(l,m,p1,p2) \
+   if (PNG_DEBUG > l) \
+     fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \
+       (l==2 ? "\t\t":(l>2 ? "\t\t\t":""))),p1,p2)
+#endif /* _MSC_VER */
 #endif /* (PNG_DEBUG > 0) */
 #endif /* PNG_DEBUG */
 #ifndef png_debug
@@ -2113,7 +2144,7 @@ extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr)
 extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr));
 
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.0.7beta11 - May 6, 2000 (header)\n"
+   " libpng version 1.0.7beta14 - May 17, 2000 (header)\n"
 
 #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
 /* With these routines we avoid an integer divide, which will be slower on
@@ -2905,5 +2936,6 @@ PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr,
 }
 #endif
 
+#endif /* PNG_VERSION_INFO_ONLY */
 /* do not put anything past this line */
 #endif /* _PNG_H */

pngasmrd.h

@@ -1,6 +1,6 @@
 /* pngasmrd.h - assembler version of utilities to read a PNG file
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1999, 2000 Glenn Randers-Pehrson
  *

pngconf.h

@@ -1,6 +1,6 @@
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger
@@ -58,6 +58,14 @@
  * #define PNG_NO_STDIO
  */
 
+#ifdef PNG_BUILD_DLL
+#  ifndef PNG_CONSOLE_IO_SUPPORTED
+#    ifndef PNG_NO_CONSOLE_IO
+#      define PNG_NO_CONSOLE_IO
+#    endif
+#  endif
+#endif
+
 #  ifdef PNG_NO_STDIO
 #    ifndef PNG_NO_CONSOLE_IO
 #      define PNG_NO_CONSOLE_IO
@@ -494,21 +502,6 @@ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
 #define PNG_ASSEMBLER_CODE_SUPPORTED
 #endif
 
-/* Do not use global arrays (helps with building DLL's)
- * They are no longer used in libpng itself, since version 1.0.5c,
- * but might be required for some pre-1.0.5c applications.
- */
-#ifdef PNG_NO_GLOBAL_ARRAYS
-#  define PNG_USE_LOCAL_ARRAYS
-#else
-#  if defined(__GNUC__) && defined(WIN32)
-#    define PNG_NO_GLOBAL_ARRAYS
-#    define PNG_USE_LOCAL_ARRAYS
-#  else
-#    define PNG_USE_GLOBAL_ARRAYS
-#  endif
-#endif
-
 /* These are currently experimental features, define them if you want */
 
 /* very little testing */
@@ -928,6 +921,18 @@ typedef z_stream FAR *  png_zstreamp;
 #  define PNG_DLL
 #endif
 
+/* Do not use global arrays (helps with building DLL's)
+ * They are no longer used in libpng itself, since version 1.0.5c,
+ * but might be required for some pre-1.0.5c applications.
+ */
+#if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS)
+#  if defined(PNG_NO_GLOBAL_ARRAYS) || (defined(__GNUC__) && defined(PNG_DLL))
+#    define PNG_USE_LOCAL_ARRAYS
+#  else
+#    define PNG_USE_GLOBAL_ARRAYS
+#  endif
+#endif
+
 #if defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
 #  define PNG_IMPEXP
 #endif
@@ -987,34 +992,9 @@ typedef z_stream FAR *  png_zstreamp;
 #  define PNG_ATTR_DLLIMP
 #endif
 
-#ifndef PNG_EXPORT
-#  define PNG_EXPORT(type,symbol) type symbol
-#endif
-
-#if defined(__MINGW32__) || defined(__CYGWIN32__)
-#  define PNG_ATTR_DLLIMP
-#endif
-
 #ifdef PNG_USE_GLOBAL_ARRAYS
 #ifndef PNG_EXPORT_VAR
-#  if defined(_MSC_VER) && defined(_DLL)   /* GRR 20000206 */
-#    define PNG_EXPORT_VAR(type) extern type __declspec(dllexport)
-#  endif
-#  ifdef PNG_DECL_DLLEXP
-#    define PNG_EXPORT_VAR(type) extern __declspec(dllexport) type
-#  endif
-#  ifdef PNG_ATTR_DLLEXP
-#    define PNG_EXPORT_VAR(type) extern type __attribute__((dllexport))
-#  endif
-#  ifdef PNG_DECL_DLLIMP
-#    define PNG_EXPORT_VAR(type) extern __declspec(dllimport) type
-#  endif
-#  ifdef PNG_ATTR_DLLIMP
-#    define PNG_EXPORT_VAR(type) extern type __attribute__((dllimport))
-#  endif
-#endif
-#ifndef PNG_EXPORT_VAR
-#    define PNG_EXPORT_VAR(type) extern type
+#  define PNG_EXPORT_VAR(type) extern type
 #endif
 #endif
 

pngerror.c

@@ -1,7 +1,7 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

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 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998, Intel Corporation
  * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@@ -230,7 +230,7 @@ png_read_filter_row_c(png_structp png_ptr, png_row_infop row_info,
 /* Use this routine for the x86 platform - it uses a faster MMX routine
    if the machine supports MMX. */
 
-void PNGAPI
+void /* PRIVATE */
 png_combine_row(png_structp png_ptr, png_bytep row, int mask)
 {
    png_debug(1,"in png_combine_row_asm\n");
@@ -4310,7 +4310,7 @@ png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row,
 
 // Optimized png_read_filter_row routines
 
-void PNGAPI
+void /* PRIVATE */
 png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
    row, png_bytep prev_row, int filter)
 {
@@ -4500,7 +4500,8 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
          break;
 
       default:
-         png_error(png_ptr, "#103 Bad adaptive filter type");
+         png_warning(png_ptr, "Ignoring bad adaptive filter type");
+         *row=0;
          break;
    }
 }

pngget.c

@@ -1,7 +1,7 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

pngmem.c

@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

pngpread.c

@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

pngread.c

@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger
@@ -697,7 +697,7 @@ 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 1.0.7beta11
+ * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.7beta14
  */
 
 void PNGAPI
@@ -746,7 +746,7 @@ 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 1.0.7beta11
+ * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.7beta14
  */
 void PNGAPI
 png_read_image(png_structp png_ptr, png_bytepp image)
@@ -1293,18 +1293,9 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
 
    /* -------------- image transformations end here ------------------- */
 
-   if(info_ptr->row_pointers)
-   {
 #ifdef PNG_FREE_ME_SUPPORTED
-      if(info_ptr->free_me & PNG_FREE_ROWS)
-      {
-         for (row = 0; row < (int)info_ptr->height; row++)
-            png_free(png_ptr, info_ptr->row_pointers[row]);
-         png_free(png_ptr, info_ptr->row_pointers);
-         info_ptr->row_pointers = NULL;
-      }
+   png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
 #endif
-   }
    if(info_ptr->row_pointers == NULL)
    {
       info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr,

pngrio.c

@@ -1,7 +1,7 @@
 
 /* pngrio.c - functions for data input
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

pngrtran.c

@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

pngrutil.c

@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger
@@ -2043,9 +2043,9 @@ png_check_chunk_name(png_structp png_ptr, png_bytep chunk_name)
    you want all pixels to be combined, pass 0xff (255) in mask.  */
 void /* PRIVATE */
 #ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
-png_combine_row_c /* PRIVATE */
+png_combine_row_c
 #else
-png_combine_row /* PRIVATE */
+png_combine_row
 #endif /* PNG_HAVE_ASSEMBLER_COMBINE_ROW */
    (png_structp png_ptr, png_bytep row, int mask)
 {

pngset.c

@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger
@@ -240,6 +240,9 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
    }
 
    info_ptr->valid |= PNG_INFO_pCAL;
+#ifdef PNG_FREE_ME_SUPPORTED
+   info_ptr->free_me |= PNG_FREE_PCAL;
+#endif
 }
 #endif
 
@@ -284,6 +287,9 @@ png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
    png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
 
    info_ptr->valid |= PNG_INFO_sCAL;
+#ifdef PNG_FREE_ME_SUPPORTED
+   info_ptr->free_me |= PNG_FREE_SCAL;
+#endif
 }
 #endif
 #endif
@@ -488,6 +494,9 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
          info_ptr->num_text = 0;
          info_ptr->text = (png_textp)png_malloc(png_ptr,
             (png_uint_32)(info_ptr->max_text * sizeof (png_text)));
+#ifdef PNG_FREE_ME_SUPPORTED
+         info_ptr->free_me |= PNG_FREE_TEXT;
+#endif
       }
       png_debug1(3, "allocated %d entries for info_ptr->text\n",
          info_ptr->max_text);
@@ -495,9 +504,7 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
    for (i = 0; i < num_text; i++)
    {
       png_size_t text_length,key_len;
-#ifdef PNG_iTXt_SUPPORTED
       png_size_t lang_len,lang_key_len;
-#endif
       png_textp textp = &(info_ptr->text[info_ptr->num_text]);
 
       if (text_ptr[i].key == (png_charp)NULL)
@@ -505,7 +512,12 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
 
       key_len = png_strlen(text_ptr[i].key);
 
-      if(text_ptr[i].compression > 0)
+      if(text_ptr[i].compression <= 0)
+      {
+        lang_len = 0;
+        lang_key_len = 0;
+      }
+      else
 #ifdef PNG_iTXt_SUPPORTED
       {
         /* set iTXt data */
@@ -518,11 +530,6 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
         else
           lang_key_len = 0;
       }
-      else
-      {
-        lang_len = 0;
-        lang_key_len = 0;
-      }
 #else
       {
         png_warning(png_ptr, "iTXt chunk not supported.");
@@ -547,17 +554,9 @@ 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 +
-#ifdef PNG_iTXt_SUPPORTED
-            lang_len + lang_key_len +
-#endif
-            text_length + 4));
+         (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 + 
-#ifdef PNG_iTXt_SUPPORTED
-         lang_len + lang_key_len +
-#endif
-         text_length + 4, textp->key);
+         key_len + lang_len + lang_key_len + text_length + 4, textp->key);
 
       png_memcpy(textp->key, text_ptr[i].key,
          (png_size_t)(key_len));
@@ -603,9 +602,6 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
       }
       info_ptr->text[info_ptr->num_text]= *textp;
       info_ptr->num_text++;
-#ifdef PNG_FREE_ME_SUPPORTED
-      info_ptr->free_me |= PNG_FREE_TEXT;
-#endif
       png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
    }
 }
@@ -806,14 +802,16 @@ void PNGAPI
 png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
 {
    png_debug1(1, "in %s storage function\n", "rows");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
-   if(info_ptr->row_pointers != row_pointers)
-   {
+   if(info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
       png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
-      info_ptr->row_pointers = row_pointers;
-   }
+   info_ptr->row_pointers = row_pointers;
+   if(row_pointers)
+      info_ptr->valid |= PNG_INFO_IDAT;
+
 }
 #endif
 
@@ -827,3 +825,10 @@ png_set_compression_buffer_size(png_structp png_ptr, png_uint_32 size)
     png_ptr->zstream.next_out = png_ptr->zbuf;
     png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
 }
+
+void PNGAPI
+png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
+{
+   if (png_ptr && info_ptr)
+      info_ptr->valid &= ~(mask);
+}

pngtest.c

@@ -1,7 +1,7 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger
@@ -1152,9 +1152,11 @@ main(int argc, char *argv[])
    fprintf(STDERR, "   with zlib   version %s\n", ZLIB_VERSION);
    fprintf(STDERR,"%s",png_get_copyright(NULL));
    /* Show the version of libpng used in building the library */
-   fprintf(STDERR," library:%s",png_get_header_version(NULL));
+   fprintf(STDERR," library (%lu):%s", png_access_version_number(),
+      png_get_header_version(NULL));
    /* Show the version of libpng used in building the application */
-   fprintf(STDERR," pngtest:%s",PNG_HEADER_VERSION_STRING);
+   fprintf(STDERR," pngtest (%lu):%s", PNG_LIBPNG_VER,
+      PNG_HEADER_VERSION_STRING);
    fprintf(STDERR," sizeof(png_struct)=%d, sizeof(png_info)=%d\n",
                     sizeof(png_struct), sizeof(png_info));
 
@@ -1378,4 +1380,4 @@ main(int argc, char *argv[])
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_0_7beta11 your_png_h_is_not_version_1_0_7beta11;
+typedef version_1_0_7beta14 your_png_h_is_not_version_1_0_7beta14;

pngtrans.c

@@ -1,7 +1,7 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

pngvcrd.c

@@ -2,7 +2,7 @@
  *
  * For Intel x86 CPU and Microsoft Visual C++ compiler
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998, Intel Corporation
  * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson
@@ -3846,7 +3846,8 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
          break;
       }
       default:
-         png_error(png_ptr, "Bad adaptive filter type");
+         png_warning(png_ptr, "Ignoring bad adaptive filter type");
+         *row=0;
          break;
    }
 }

pngwio.c

@@ -1,7 +1,7 @@
 
 /* pngwio.c - functions for data output
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

pngwrite.c

@@ -1,7 +1,7 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger
@@ -1245,8 +1245,7 @@ png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
 #if defined(PNG_INFO_IMAGE_SUPPORTED)
 void PNGAPI
 png_write_png(png_structp png_ptr, png_infop info_ptr,
-                           int transforms,
-                           voidp params)
+              int transforms, voidp params)
 {
 #if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
    /* invert the alpha channel from opacity to transparency */

pngwtran.c

@@ -1,7 +1,7 @@
 
 /* pngwtran.c - transforms the data in a row for PNG writers
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

pngwutil.c

@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * libpng 1.0.7beta11 - May 6, 2000
+ * libpng 1.0.7beta14 - May 17, 2000
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
  * Copyright (c) 1996, 1997 Andreas Dilger

scripts/makefile.beos

@@ -31,7 +31,7 @@ RANLIB=ranlib
 # read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
 # have to change it.
 PNGMAJ = 2
-PNGMIN = 1.0.7beta11
+PNGMIN = 1.0.7beta14
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # where make install puts libpng.a, libpng.so*, and png.h

scripts/makefile.dec

@@ -14,7 +14,7 @@ ZLIBINC=../zlib
 # read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
 # have to change it.
 PNGMAJ = 2
-PNGMIN = 1.0.7beta11
+PNGMIN = 1.0.7beta14
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 CC=cc

scripts/makefile.gcmmx

@@ -34,7 +34,7 @@ RANLIB=ranlib
 # read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
 # have to change it.
 PNGMAJ = 2
-PNGMIN = 1.0.7beta11
+PNGMIN = 1.0.7beta14
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 INCPATH=$(prefix)/include

scripts/makefile.linux

@@ -34,7 +34,7 @@ RANLIB=ranlib
 # read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
 # have to change it.
 PNGMAJ = 2
-PNGMIN = 1.0.7beta11
+PNGMIN = 1.0.7beta14
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 INCPATH=$(prefix)/include

scripts/makefile.sco

@@ -25,7 +25,7 @@ RANLIB=echo
 # read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
 # have to change it.
 PNGMAJ = 2
-PNGMIN = 1.0.7beta11
+PNGMIN = 1.0.7beta14
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 INCPATH=$(prefix)/include

scripts/makefile.sggcc

@@ -19,8 +19,8 @@ CFLAGS=-I$(ZLIBINC) -O2 $(WARNMORE) -fPIC -mabi=n32 # -g -DPNG_DEBUG=5
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
 LDSHARED=gcc -shared
 
-VER=1.0.7beta11
-LIBS=libpng.so.1.0.7beta11
+VER=1.0.7beta14
+LIBS=libpng.so.1.0.7beta14
 SHAREDLIB=libpng.so
 libdir=$(prefix)/lib32
 

scripts/makefile.solaris

@@ -31,7 +31,7 @@ RANLIB=echo
 # read libpng.txt or png.h to see why PNGMAJ is 2.  You should not
 # have to change it.
 PNGMAJ = 2
-PNGMIN = 1.0.7beta11
+PNGMIN = 1.0.7beta14
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 INCPATH=$(prefix)/include

scripts/pngdef.pas

@@ -1,9 +1,11 @@
 unit pngdef;
 
+// Caution: this file is probably out of date.
+
 interface
 
 const
-  PNG_LIBPNG_VER_STRING = '1.0.7beta11';
+  PNG_LIBPNG_VER_STRING = '1.0.7beta14';
   PNG_LIBPNG_VER        =  10007;
 
 type
@@ -508,6 +510,9 @@ procedure png_set_hIST(png_ptr: png_structp; info_ptr: png_infop;
              stdcall;
 function png_set_interlace_handling(png_ptr: png_structp): int;
              stdcall;
+procedure png_set_invalid(png_ptr: png_structp; info_ptr:png_infop;
+             mask: int);
+             stdcall;
 procedure png_set_invert_alpha(png_ptr: png_structp);
              stdcall;
 procedure png_set_invert_mono(png_ptr: png_structp);

scripts/pngos2.def

@@ -2,6 +2,8 @@
 ; PNGLIB module definition file for OS/2
 ;----------------------------------------
 
+; Caution: This file is probably out of date.
+
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
 CODE		PRELOAD MOVEABLE DISCARDABLE
@@ -36,6 +38,7 @@ EXPORTS
   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