Imported from libpng-1.2.21beta2.tar

ANNOUNCE

@@ -1,53 +1,100 @@
 
-Libpng 1.2.20 - September 8, 2007
+Libpng 1.2.21beta2 - September 18, 2007
 
-This is a public release of libpng, intended for use in production codes.
+This is not intended to be a public release.  It will be replaced
+within a few weeks by a public version or by another test version.
 
 Files available for download:
 
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.2.20.tar.gz
-   libpng-1.2.20.tar.bz2
+   libpng-1.2.21beta2.tar.gz
+   libpng-1.2.21beta2.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   libpng-1.2.20-no-config.tar.gz
-   libpng-1.2.20-no-config.tar.bz2
+   libpng-1.2.21beta2-no-config.tar.gz
+   libpng-1.2.21beta2-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lpng1220.zip
-   lpng1220.tar.bz2
+   lp1221b02.zip
+   lp1221b02.tar.bz2
 
 Project files
 
-   libpng-1.2.20-project-netware.zip
-   libpng-1.2.20-project-wince.zip
+   libpng-1.2.21beta2-project-netware.zip
+   libpng-1.2.21beta2-project-wince.zip
 
 Other information:
 
-   libpng-1.2.20-README.txt
-   libpng-1.2.20-KNOWNBUGS.txt
-   libpng-1.2.20-LICENSE.txt
-   libpng-1.2.20-Y2K-compliance.txt
+   libpng-1.2.21beta2-README.txt
+   libpng-1.2.21beta2-KNOWNBUGS.txt
+   libpng-1.2.21beta2-LICENSE.txt
+   libpng-1.2.21beta2-Y2K-compliance.txt
 
 Changes since the last public release (1.2.19):
 
-version 1.2.20 [September 8, 2007]
-
+version 1.2.20beta01 [August 19, 2007]
+  Fixed problem with compiling pnggccrd.c on Intel-Apple platforms.
   Added PNG_NO_ERROR_TEXT feature, with demo in contrib/pngminim
   Removed define PNG_WARN_UNINITIALIZED_ROW 1 /* 0: warning; 1: error */
     because it caused some trouble.
+
+version 1.2.20beta02 [August 20, 2007]
+  Avoid compiling pnggccrd.c on Intel-Apple platforms.
+
+version 1.2.20beta03 [August 20, 2007]
+  Added "/D PNG_NO_MMX_CODE" to the non-mmx builds of projects/visualc6
+    and visualc71.
+
+version 1.2.20beta04 [August 21, 2007]
+  Revised pngvcrd.c for improved efficiency (Steve Snyder).
+
+version 1.2.20rc1 [August 23, 2007]
+  Revised pngconf.h to set PNG_NO_MMX_CODE for gcc-3.x compilers.
+
+version 1.2.20rc2 [August 27, 2007]
   Revised scripts/CMakeLists.txt
+  Revised #ifdefs to ensure one and only one of pnggccrd.c, pngvcrd.c,
+    or part of pngrutil.c is selected.
+
+version 1.2.20rc3 [September 18, 2007]
   Remove a little more code in pngwutil.c when PNG_NO_WRITE_FILTER is selected.
   Added /D _CRT_SECURE_NO_WARNINGS to visual6c and visualc71 projects.
+  Compile png_mmx_support() in png.c even when PNG_NO_MMX_CODE is defined.
+  Restored a "superfluous" #ifdef that was removed from 1.2.20rc2 pnggccrd.c,
+    breaking the png_mmx_support() function.
+
+version 1.2.20rc4 [September 1, 2007]
   Removed Intel contributions (MMX, Optimized C).
 
+version 1.2.20rc5 [September 2, 2007]
+  Restored configure and Makefile.in to rc3 and put a snippet of code in
+    pnggccrd.c, to ensure configure makes the same PNG_NO_MMX_CODE selection
+
+version 1.2.20rc6 [September 2, 2007]
+  Fixed bugs in scripts/CMakeLists.txt
+  Removed pngvcrd.c references from msvc projects.
+
+version 1.0.28 and 1.2.20 [September 8, 2007]
+  Removed "(NO READ SUPPORT)" from png_get_header_version() string.
+
+version 1.2.21beta1 [September 14, 2007]
+  Fixed various mistakes reported by George Cook and Jeff Phillips:
+  logical vs bitwise NOT in pngrtran.c, bug introduced in 1.2.19rc2
+  16-bit cheap transparency expansion, bug introduced in 1.2.19beta2
+  errors with sizeof(unknown_chunk.name), bugs introduced in 1.2.19beta11
+  <= compare with unsigned var in pngset.c, should be ==.
+
+version 1.2.21beta2 [September 18, 2007]
+  Removed some extraneous typecasts.
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+
 (subscription required; visit 
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
 to subscribe) or to glennrp at users.sourceforge.net

CHANGES

@@ -1480,7 +1480,7 @@ version 1.2.9beta5 [March 4, 2006]
   Restored scripts/makefile.elf which was inadvertently deleted.
 
 version 1.2.9beta6 [March 6, 2006]
-  Fixed typo (20) in configuration files.
+  Fixed typo (21) in configuration files.
 
 version 1.2.9beta7 [March 7, 2006]
   Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am
@@ -1677,7 +1677,7 @@ version 1.2.15rc4 [December 27, 2006]
 version 1.2.15rc5 [December 31, 2006]
   Revised handling of rgb_to_gray.
 
-version 1.2.15 [January 5, 2007]
+version 1.0.23, 1.2.15 [January 5, 2007]
   Added some (unsigned long) typecasts in pngtest.c to avoid printing errors.
 
 version 1.2.16beta1 [January 6, 2007]
@@ -1686,7 +1686,7 @@ version 1.2.16beta1 [January 6, 2007]
 version 1.2.16beta2 [January 16, 2007]
   Revised scripts/CMakeLists.txt
  
-version 1.2.16 [January 31, 2007]
+version 1.0.24, 1.2.16 [January 31, 2007]
   No changes.
  
 version 1.2.17beta1 [March 6, 2007]
@@ -1940,6 +1940,16 @@ version 1.2.20rc6 [September 2, 2007]
 version 1.0.28 and 1.2.20 [September 8, 2007]
   Removed "(NO READ SUPPORT)" from png_get_header_version() string.
 
+version 1.2.21beta1 [September 14, 2007]
+  Fixed various mistakes reported by George Cook and Jeff Phillips:
+  logical vs bitwise NOT in pngrtran.c, bug introduced in 1.2.19rc2
+  16-bit cheap transparency expansion, bug introduced in 1.2.19beta2
+  errors with sizeof(unknown_chunk.name), bugs introduced in 1.2.19beta11
+  <= compare with unsigned var in pngset.c, should be ==.
+
+version 1.2.21beta2 [September 18, 2007]
+  Removed some extraneous typecasts.
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement

INSTALL

@@ -1,5 +1,5 @@
 
-Installing libpng version 1.2.20 - September 8, 2007
+Installing libpng version 1.2.21beta2 - September 18, 2007
 
 On Unix/Linux and similar systems, you can simply type
 
@@ -44,7 +44,7 @@ to have access to the 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-1.2.20" or "lpng109" and "zlib-1.2.1"
+might be called "libpng-1.2.21beta2" or "lpng109" and "zlib-1.2.1"
 or "zlib121") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
@@ -101,9 +101,9 @@ include
  CMakeLists.txt    =>  "cmake" script
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       gcc, creates libpng12.so.0.1.2.20)
+                       gcc, creates libpng12.so.0.1.2.21beta2)
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng12.so.0.1.2.20)
+                       (gcc, creates libpng12.so.0.1.2.21beta2)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
@@ -125,14 +125,14 @@ include
  makefile.openbsd  =>  OpenBSD makefile
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng12.so.0.1.2.20)
+                       creates libpng12.so.0.1.2.21beta2)
  makefile.sunos    =>  Sun makefile
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng12.so.0.1.2.20)
+                       creates libpng12.so.0.1.2.21beta2)
  makefile.solaris-x86 =>  Solaris/intelMMX 2.X makefile (gcc,
-                       creates libpng12.so.0.1.2.20)
+                       creates libpng12.so.0.1.2.21beta2)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng12.so.0.1.2.20)
+                       creates libpng12.so.0.1.2.21beta2)
  makefile.32sunu   =>  Sun Ultra 32-bit makefile
  makefile.64sunu   =>  Sun Ultra 64-bit makefile
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc

KNOWNBUG

@@ -1,5 +1,5 @@
 
-Known bugs in libpng version 1.2.20
+Known bugs in libpng version 1.2.21beta2
 
 1. February 23, 2006: The custom makefiles don't build libpng with -lz.
 

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 1.2.6, August 15, 2004, through 1.2.20, September 8, 2007, are
+libpng versions 1.2.6, August 15, 2004, through 1.2.21beta2, September 18, 2007, are
 Copyright (c) 2004, 2006-2007 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -106,4 +106,4 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-September 8, 2007
+September 18, 2007

README

@@ -1,4 +1,4 @@
-README for libpng version 1.2.20 - September 8, 2007 (shared library 12.0)
+README for libpng version 1.2.21beta2 - September 18, 2007 (shared library 12.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -190,11 +190,11 @@ Files in this distribution:
        descrip.mms      =>  VMS makefile for MMS or MMK
        makefile.std     =>  Generic UNIX makefile (cc, creates static libpng.a)
        makefile.elf     =>  Linux/ELF makefile symbol versioning,
-                            gcc, creates libpng12.so.0.1.2.20)
+                            gcc, creates libpng12.so.0.1.2.21beta2)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng12.so.0.1.2.20)
+                            (gcc, creates libpng12.so.0.1.2.21beta2)
        makefile.gcmmx   =>  Linux/ELF makefile
-                            (gcc, creates libpng12.so.0.1.2.20,
+                            (gcc, creates libpng12.so.0.1.2.21beta2,
                             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
@@ -216,12 +216,12 @@ Files in this distribution:
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng12.so.0.1.2.20)
+                            (gcc, creates libpng12.so.0.1.2.21beta2)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng12.so.0.1.2.20)
+                            (gcc, creates libpng12.so.0.1.2.21beta2)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng12.so.0.1.2.20)
+                            (gcc, creates libpng12.so.0.1.2.21beta2)
        makefile.32sunu  =>  Sun Ultra 32-bit makefile
        makefile.64sunu  =>  Sun Ultra 64-bit makefile
        makefile.sco     =>  For SCO OSr5  ELF and Unixware 7 with Native cc

Y2KINFO

@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      September 8, 2007
+      September 18, 2007
 
       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 1.2.20 are Y2K compliant.  It is my belief that earlier
+      upward through 1.2.21beta2 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

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.61 for libpng 1.2.20.
+# Generated by GNU Autoconf 2.61 for libpng 1.2.21beta2.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -728,8 +728,8 @@ SHELL=${CONFIG_SHELL-/bin/sh}
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.2.20'
-PACKAGE_STRING='libpng 1.2.20'
+PACKAGE_VERSION='1.2.21beta2'
+PACKAGE_STRING='libpng 1.2.21beta2'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 
 ac_unique_file="pngget.c"
@@ -1405,7 +1405,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures libpng 1.2.20 to adapt to many kinds of systems.
+\`configure' configures libpng 1.2.21beta2 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1475,7 +1475,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.2.20:";;
+     short | recursive ) echo "Configuration of libpng 1.2.21beta2:";;
    esac
   cat <<\_ACEOF
 
@@ -1585,7 +1585,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.2.20
+libpng configure 1.2.21beta2
 generated by GNU Autoconf 2.61
 
 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
@@ -1599,7 +1599,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by libpng $as_me 1.2.20, which was
+It was created by libpng $as_me 1.2.21beta2, which was
 generated by GNU Autoconf 2.61.  Invocation command line was
 
   $ $0 $@
@@ -2269,7 +2269,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.2.20'
+ VERSION='1.2.21beta2'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2440,10 +2440,10 @@ fi
 
 
 
-PNGLIB_VERSION=1.2.20
+PNGLIB_VERSION=1.2.21beta2
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=2
-PNGLIB_RELEASE=20
+PNGLIB_RELEASE=21
 
 
 
@@ -21282,7 +21282,7 @@ exec 6>&1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by libpng $as_me 1.2.20, which was
+This file was extended by libpng $as_me 1.2.21beta2, which was
 generated by GNU Autoconf 2.61.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -21335,7 +21335,7 @@ Report bugs to <bug-autoconf@gnu.org>."
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF
 ac_cs_version="\\
-libpng config.status 1.2.20
+libpng config.status 1.2.21beta2
 configured by $0, generated by GNU Autoconf 2.61,
   with options \\"`echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
 

configure.ac

@@ -18,15 +18,15 @@ AC_PREREQ(2.59)
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.2.20], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.2.21beta2], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.2.20
+PNGLIB_VERSION=1.2.21beta2
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=2
-PNGLIB_RELEASE=20
+PNGLIB_RELEASE=21
 
 dnl End of version number stuff
 

libpng-1.2.21beta2.txt

@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.2.20 - September 8, 2007
+ libpng version 1.2.21beta2 - September 18, 2007
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2007 Glenn Randers-Pehrson
@@ -2796,13 +2796,13 @@ application:
 
 IX. Y2K Compliance in libpng
 
-September 8, 2007
+September 18, 2007
 
 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 1.2.20 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.21beta2 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

libpng.3

@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "September 8, 2007"
+.TH LIBPNG 3 "September 18, 2007"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.20
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.21beta2
 .SH SYNOPSIS
 \fB
 #include <png.h>\fP
@@ -410,7 +410,7 @@ 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 1.2.20 - September 8, 2007
+ libpng version 1.2.21beta2 - September 18, 2007
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2007 Glenn Randers-Pehrson
@@ -3206,13 +3206,13 @@ application:
 
 .SH IX. Y2K Compliance in libpng
 
-September 8, 2007
+September 18, 2007
 
 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 1.2.20 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.21beta2 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
@@ -3466,7 +3466,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.2.20 - September 8, 2007:
+Libpng version 1.2.21beta2 - September 18, 2007:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -3487,7 +3487,7 @@ included in the libpng distribution, the latter shall prevail.)
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.2.6, August 15, 2004, through 1.2.20, September 8, 2007, are
+libpng versions 1.2.6, August 15, 2004, through 1.2.21beta2, September 18, 2007, are
 Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -3586,7 +3586,7 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-September 8, 2007
+September 18, 2007
 
 .\" end of man page
 

libpngpf.3

@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "September 8, 2007"
+.TH LIBPNGPF 3 "September 18, 2007"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.20
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.21beta2
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP

png.5

@@ -1,4 +1,4 @@
-.TH PNG 5 "September 8, 2007"
+.TH PNG 5 "September 18, 2007"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION

png.c

@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.2.19 August 19, 2007
+ * Last changed in libpng 1.2.21 [September 18, 2007]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -13,7 +13,7 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_20 Your_png_h_is_not_version_1_2_20;
+typedef version_1_2_21beta2 Your_png_h_is_not_version_1_2_21beta2;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.  */
@@ -693,7 +693,7 @@ png_charp PNGAPI
 png_get_copyright(png_structp png_ptr)
 {
    png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
-   return ((png_charp) "\n libpng version 1.2.20 - September 8, 2007\n\
+   return ((png_charp) "\n libpng version 1.2.21beta2 - September 18, 2007\n\
    Copyright (c) 1998-2007 Glenn Randers-Pehrson\n\
    Copyright (c) 1996-1997 Andreas Dilger\n\
    Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");

png.h

@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.2.20 - September 8, 2007
+ * libpng version 1.2.21beta2 - September 18, 2007
  * Copyright (c) 1998-2007 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 1.2.20 - September 8, 2007: Glenn
+ *  libpng versions 0.97, January 1998, through 1.2.21beta2 - September 18, 2007: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -189,7 +189,7 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.2.20, September 8, 2007, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.2.21beta2, September 18, 2007, are
  * Copyright (c) 2004, 2006-2007 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
@@ -301,13 +301,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    September 8, 2007
+ *    September 18, 2007
  *
  *    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 1.2.20 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.2.21beta2 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
@@ -363,9 +363,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.2.20"
+#define PNG_LIBPNG_VER_STRING "1.2.21beta2"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.2.20 - September 8, 2007\n"
+   " libpng version 1.2.21beta2 - September 18, 2007\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  13
@@ -373,11 +373,11 @@
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   2
-#define PNG_LIBPNG_VER_RELEASE 20
+#define PNG_LIBPNG_VER_RELEASE 21
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
 
-#define PNG_LIBPNG_VER_BUILD  0
+#define PNG_LIBPNG_VER_BUILD  2
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -394,14 +394,14 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                        PNG_LIBPNG_BUILD_PRIVATE */
 
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
 
 /* 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 10220 /* 1.2.20 */
+#define PNG_LIBPNG_VER 10221 /* 1.2.21 */
 
 #ifndef PNG_VERSION_INFO_ONLY
 /* include the compression library's header */
@@ -1412,7 +1412,7 @@ struct png_struct_def
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef png_structp version_1_2_20;
+typedef png_structp version_1_2_21beta2;
 
 typedef png_struct FAR * FAR * png_structpp;
 

pngconf.h

@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.2.20 - September 8, 2007
+ * libpng version 1.2.21beta2 - September 18, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -76,9 +76,9 @@
 /* End of material added to libpng-1.2.8 */
 
 /* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble
+   Restored at libpng-1.2.21 */
 #    define PNG_WARN_UNINITIALIZED_ROW 1
-*/
-/* End of material added at libpng-1.2.19 */
+/* End of material added at libpng-1.2.19/1.2.21 */
 
 /* This is the size of the compression buffer, and thus the size of
  * an IDAT chunk.  Make this whatever size you feel is best for your

pngerror.c

@@ -1,7 +1,7 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * Last changed in libpng 1.2.20 September 8, 2007
+ * Last changed in libpng 1.2.20 September 18, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

pngpread.c

@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.2.20 September 8, 2007
+ * Last changed in libpng 1.2.21 September 18, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -216,7 +216,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
       png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
    }
 
-   if (!png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
+   if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
      if(png_ptr->mode & PNG_AFTER_IDAT)
         png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
 
@@ -273,7 +273,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
       }
       png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length);
    }
-   else if (!png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
+   else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
    {
       /* If we reach an IDAT chunk, this means we have read all of the
        * header chunks, and we can start reading the image (or if this
@@ -678,7 +678,7 @@ png_push_read_IDAT(png_structp png_ptr)
       png_crc_read(png_ptr, png_ptr->chunk_name, 4);
       png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
 
-      if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
+      if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
       {
          png_ptr->process_mode = PNG_READ_CHUNK_MODE;
          if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
@@ -1487,8 +1487,7 @@ png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
       }
 #endif
       png_strncpy((png_charp)png_ptr->unknown_chunk.name,
-	 (png_charp)png_ptr->chunk_name,
-        png_sizeof((png_charp)png_ptr->chunk_name));
+	 (png_charp)png_ptr->chunk_name, 5);
       png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
       png_ptr->unknown_chunk.size = (png_size_t)length;
       png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);

pngread.c

@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.2.19 August 19, 2007
+ * Last changed in libpng 1.2.20 September 7, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -415,7 +415,7 @@ png_read_info(png_structp png_ptr, png_infop info_ptr)
       /* This should be a binary subdivision search or a hash for
        * matching the chunk name rather than a linear search.
        */
-      if (!png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
+      if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
         if(png_ptr->mode & PNG_AFTER_IDAT)
           png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
 

pngrtran.c

@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.2.19 August 19, 2007
+ * Last changed in libpng 1.2.21 [September 18, 2007]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -549,7 +549,7 @@ png_set_expand(png_structp png_ptr)
    if(png_ptr == NULL) return;
    png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
 #ifdef PNG_WARN_UNINITIALIZED_ROW
-   png_ptr->flags &= !(PNG_FLAG_ROW_INIT);
+   png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
 #endif
 }
 
@@ -579,6 +579,7 @@ png_set_palette_to_rgb(png_structp png_ptr)
    png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
 #ifdef PNG_WARN_UNINITIALIZED_ROW
    png_ptr->flags &= !(PNG_FLAG_ROW_INIT);
+   png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
 #endif
 }
 
@@ -591,7 +592,7 @@ png_set_expand_gray_1_2_4_to_8(png_structp png_ptr)
    if(png_ptr == NULL) return;
    png_ptr->transformations |= PNG_EXPAND;
 #ifdef PNG_WARN_UNINITIALIZED_ROW
-   png_ptr->flags &= !(PNG_FLAG_ROW_INIT);
+   png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
 #endif
 }
 #endif
@@ -616,7 +617,7 @@ png_set_tRNS_to_alpha(png_structp png_ptr)
    png_debug(1, "in png_set_tRNS_to_alpha\n");
    png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
 #ifdef PNG_WARN_UNINITIALIZED_ROW
-   png_ptr->flags &= !(PNG_FLAG_ROW_INIT);
+   png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
 #endif
 }
 #endif /* defined(PNG_READ_EXPAND_SUPPORTED) */
@@ -628,7 +629,7 @@ png_set_gray_to_rgb(png_structp png_ptr)
    png_debug(1, "in png_set_gray_to_rgb\n");
    png_ptr->transformations |= PNG_GRAY_TO_RGB;
 #ifdef PNG_WARN_UNINITIALIZED_ROW
-   png_ptr->flags &= !(PNG_FLAG_ROW_INIT);
+   png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
 #endif
 }
 #endif
@@ -3867,9 +3868,9 @@ png_do_expand(png_row_infop row_info, png_bytep row,
          }
          else if (row_info->bit_depth == 16)
          {
-            png_byte red_high = (trans_value->red > 8) & 0xff;
-            png_byte green_high = (trans_value->green > 8) & 0xff;
-            png_byte blue_high = (trans_value->blue > 8) & 0xff;
+            png_byte red_high = (trans_value->red >> 8) & 0xff;
+            png_byte green_high = (trans_value->green >> 8) & 0xff;
+            png_byte blue_high = (trans_value->blue >> 8) & 0xff;
             png_byte red_low = trans_value->red & 0xff;
             png_byte green_low = trans_value->green & 0xff;
             png_byte blue_low = trans_value->blue & 0xff;

pngrutil.c

@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.2.19 August 19, 2007
+ * Last changed in libpng 1.2.21 [September 18, 2007]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -2206,8 +2206,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
        }
 #endif
        png_strncpy((png_charp)png_ptr->unknown_chunk.name,
-	 (png_charp)png_ptr->chunk_name,
-         png_sizeof((png_charp)png_ptr->chunk_name));
+	 (png_charp)png_ptr->chunk_name, 5);
        png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
        png_ptr->unknown_chunk.size = (png_size_t)length;
        png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
@@ -2911,7 +2910,7 @@ png_read_finish_row(png_structp png_ptr)
                png_ptr->idat_size = png_get_uint_31(png_ptr, chunk_length);
                png_reset_crc(png_ptr);
                png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-               if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_IDAT, 4))
+               if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
                   png_error(png_ptr, "Not enough image data");
 
             }

pngset.c

@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.2.17 May 15, 2007
+ * Last changed in libpng 1.2.21 [September 18, 2007]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -222,7 +222,7 @@ png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
    png_debug1(1, "in %s storage function\n", "hIST");
    if (png_ptr == NULL || info_ptr == NULL)
       return;
-   if (info_ptr->num_palette <= 0 || info_ptr->num_palette
+   if (info_ptr->num_palette == 0 || info_ptr->num_palette
        > PNG_MAX_PALETTE_LENGTH)
    {
        png_warning(png_ptr,
@@ -690,7 +690,7 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
       png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
       return;
    }
-   png_strncpy(new_iccp_name, name, png_sizeof(new_iccp_name));
+   png_strncpy(new_iccp_name, name, png_strlen(new_iccp_name)+1);
    new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
    if (new_iccp_profile == NULL)
    {
@@ -980,7 +980,7 @@ png_set_sPLT(png_structp png_ptr,
              "Out of memory while processing sPLT chunk");
         }
         /* TODO: use png_malloc_warn */
-        png_strncpy(to->name, from->name, png_strlen(from->name));
+        png_strncpy(to->name, from->name, png_strlen(from->name)+1);
         to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
             from->nentries * png_sizeof(png_sPLT_entry));
         /* TODO: use png_malloc_warn */

pngtest.c

@@ -1548,4 +1548,4 @@ main(int argc, char *argv[])
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_20 your_png_h_is_not_version_1_2_20;
+typedef version_1_2_21beta2 your_png_h_is_not_version_1_2_21beta2;

pngwutil.c

@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.2.19 August 19, 2007
+ * Last changed in libpng 1.2.20 Septhember 3, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -378,7 +378,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
    int interlace_type)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_IHDR;
+   PNG_CONST PNG_IHDR;
 #endif
    png_byte buf[13]; /* buffer to store the IHDR info */
 
@@ -494,7 +494,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
    buf[12] = (png_byte)interlace_type;
 
    /* write the chunk */
-   png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13);
+   png_write_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
 
    /* initialize zlib with PNG info */
    png_ptr->zstream.zalloc = png_zalloc;
@@ -544,7 +544,7 @@ void /* PRIVATE */
 png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_PLTE;
+   PNG_CONST PNG_PLTE;
 #endif
    png_uint_32 i;
    png_colorp pal_ptr;
@@ -607,7 +607,7 @@ void /* PRIVATE */
 png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_IDAT;
+   PNG_CONST PNG_IDAT;
 #endif
    png_debug(1, "in png_write_IDAT\n");
 
@@ -650,7 +650,7 @@ png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
             "Invalid zlib compression method or flags in IDAT");
    }
 
-   png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length);
+   png_write_chunk(png_ptr, png_IDAT, data, length);
    png_ptr->mode |= PNG_HAVE_IDAT;
 }
 
@@ -659,10 +659,10 @@ void /* PRIVATE */
 png_write_IEND(png_structp png_ptr)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_IEND;
+   PNG_CONST PNG_IEND;
 #endif
    png_debug(1, "in png_write_IEND\n");
-   png_write_chunk(png_ptr, (png_bytep)png_IEND, png_bytep_NULL,
+   png_write_chunk(png_ptr, png_IEND, png_bytep_NULL,
      (png_size_t)0);
    png_ptr->mode |= PNG_HAVE_IEND;
 }
@@ -674,7 +674,7 @@ void /* PRIVATE */
 png_write_gAMA(png_structp png_ptr, double file_gamma)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_gAMA;
+   PNG_CONST PNG_gAMA;
 #endif
    png_uint_32 igamma;
    png_byte buf[4];
@@ -683,7 +683,7 @@ png_write_gAMA(png_structp png_ptr, double file_gamma)
    /* file_gamma is saved in 1/100,000ths */
    igamma = (png_uint_32)(file_gamma * 100000.0 + 0.5);
    png_save_uint_32(buf, igamma);
-   png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
+   png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
 }
 #endif
 #ifdef PNG_FIXED_POINT_SUPPORTED
@@ -691,14 +691,14 @@ void /* PRIVATE */
 png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_gAMA;
+   PNG_CONST PNG_gAMA;
 #endif
    png_byte buf[4];
 
    png_debug(1, "in png_write_gAMA\n");
    /* file_gamma is saved in 1/100,000ths */
    png_save_uint_32(buf, (png_uint_32)file_gamma);
-   png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
+   png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
 }
 #endif
 #endif
@@ -709,7 +709,7 @@ void /* PRIVATE */
 png_write_sRGB(png_structp png_ptr, int srgb_intent)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_sRGB;
+   PNG_CONST PNG_sRGB;
 #endif
    png_byte buf[1];
 
@@ -718,7 +718,7 @@ png_write_sRGB(png_structp png_ptr, int srgb_intent)
          png_warning(png_ptr,
             "Invalid sRGB rendering intent specified");
    buf[0]=(png_byte)srgb_intent;
-   png_write_chunk(png_ptr, (png_bytep)png_sRGB, buf, (png_size_t)1);
+   png_write_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
 }
 #endif
 
@@ -729,7 +729,7 @@ png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
    png_charp profile, int profile_len)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_iCCP;
+   PNG_CONST PNG_iCCP;
 #endif
    png_size_t name_len;
    png_charp new_name;
@@ -802,7 +802,7 @@ void /* PRIVATE */
 png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_sPLT;
+   PNG_CONST PNG_sPLT;
 #endif
    png_size_t name_len;
    png_charp new_name;
@@ -885,7 +885,7 @@ void /* PRIVATE */
 png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_sBIT;
+   PNG_CONST PNG_sBIT;
 #endif
    png_byte buf[4];
    png_size_t size;
@@ -931,7 +931,7 @@ png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
       buf[size++] = sbit->alpha;
    }
 
-   png_write_chunk(png_ptr, (png_bytep)png_sBIT, buf, size);
+   png_write_chunk(png_ptr, png_sBIT, buf, size);
 }
 #endif
 
@@ -944,7 +944,7 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
    double blue_x, double blue_y)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_cHRM;
+   PNG_CONST PNG_cHRM;
 #endif
    png_byte buf[32];
    png_uint_32 itemp;
@@ -995,7 +995,7 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
    itemp = (png_uint_32)(blue_y * 100000.0 + 0.5);
    png_save_uint_32(buf + 28, itemp);
 
-   png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
+   png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
 }
 #endif
 #ifdef PNG_FIXED_POINT_SUPPORTED
@@ -1006,7 +1006,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
    png_fixed_point blue_y)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_cHRM;
+   PNG_CONST PNG_cHRM;
 #endif
    png_byte buf[32];
 
@@ -1047,7 +1047,7 @@ png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
    png_save_uint_32(buf + 24, (png_uint_32)blue_x);
    png_save_uint_32(buf + 28, (png_uint_32)blue_y);
 
-   png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
+   png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
 }
 #endif
 #endif
@@ -1059,7 +1059,7 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
    int num_trans, int color_type)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_tRNS;
+   PNG_CONST PNG_tRNS;
 #endif
    png_byte buf[6];
 
@@ -1072,7 +1072,7 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
          return;
       }
       /* write the chunk out as it is */
-      png_write_chunk(png_ptr, (png_bytep)png_tRNS, trans, (png_size_t)num_trans);
+      png_write_chunk(png_ptr, png_tRNS, trans, (png_size_t)num_trans);
    }
    else if (color_type == PNG_COLOR_TYPE_GRAY)
    {
@@ -1084,7 +1084,7 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
          return;
       }
       png_save_uint_16(buf, tran->gray);
-      png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)2);
+      png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
    }
    else if (color_type == PNG_COLOR_TYPE_RGB)
    {
@@ -1098,7 +1098,7 @@ png_write_tRNS(png_structp png_ptr, png_bytep trans, png_color_16p tran,
               "Ignoring attempt to write 16-bit tRNS chunk when bit_depth is 8");
             return;
          }
-      png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)6);
+      png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
    }
    else
    {
@@ -1113,7 +1113,7 @@ void /* PRIVATE */
 png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_bKGD;
+   PNG_CONST PNG_bKGD;
 #endif
    png_byte buf[6];
 
@@ -1131,7 +1131,7 @@ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
          return;
       }
       buf[0] = back->index;
-      png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)1);
+      png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
    }
    else if (color_type & PNG_COLOR_MASK_COLOR)
    {
@@ -1144,7 +1144,7 @@ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
               "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8");
             return;
          }
-      png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)6);
+      png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
    }
    else
    {
@@ -1155,7 +1155,7 @@ png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
          return;
       }
       png_save_uint_16(buf, back->gray);
-      png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)2);
+      png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
    }
 }
 #endif
@@ -1166,7 +1166,7 @@ void /* PRIVATE */
 png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_hIST;
+   PNG_CONST PNG_hIST;
 #endif
    int i;
    png_byte buf[3];
@@ -1328,7 +1328,7 @@ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
    png_size_t text_len)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_tEXt;
+   PNG_CONST PNG_tEXt;
 #endif
    png_size_t key_len;
    png_charp new_key;
@@ -1346,7 +1346,7 @@ png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
       text_len = png_strlen(text);
 
    /* make sure we include the 0 after the key */
-   png_write_chunk_start(png_ptr, (png_bytep)png_tEXt, (png_uint_32)key_len+text_len+1);
+   png_write_chunk_start(png_ptr, png_tEXt, (png_uint_32)key_len+text_len+1);
    /*
     * We leave it to the application to meet PNG-1.0 requirements on the
     * contents of the text.  PNG-1.0 through PNG-1.2 discourage the use of
@@ -1369,7 +1369,7 @@ png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text,
    png_size_t text_len, int compression)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_zTXt;
+   PNG_CONST PNG_zTXt;
 #endif
    png_size_t key_len;
    char buf[1];
@@ -1404,7 +1404,7 @@ png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text,
        &comp);
 
    /* write start of chunk */
-   png_write_chunk_start(png_ptr, (png_bytep)png_zTXt, (png_uint_32)
+   png_write_chunk_start(png_ptr, png_zTXt, (png_uint_32)
       (key_len+text_len+2));
    /* write key */
    png_write_chunk_data(png_ptr, (png_bytep)new_key, key_len + 1);
@@ -1428,7 +1428,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
     png_charp lang, png_charp lang_key, png_charp text)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_iTXt;
+   PNG_CONST PNG_iTXt;
 #endif
    png_size_t lang_len, key_len, lang_key_len, text_len;
    png_charp new_lang, new_key;
@@ -1472,7 +1472,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
    /* make sure we include the compression flag, the compression byte,
     * and the NULs after the key, lang, and lang_key parts */
 
-   png_write_chunk_start(png_ptr, (png_bytep)png_iTXt,
+   png_write_chunk_start(png_ptr, png_iTXt,
           (png_uint_32)(
         5 /* comp byte, comp flag, terminators for key, lang and lang_key */
         + key_len
@@ -1517,7 +1517,7 @@ png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
    int unit_type)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_oFFs;
+   PNG_CONST PNG_oFFs;
 #endif
    png_byte buf[9];
 
@@ -1539,7 +1539,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
    png_int_32 X1, int type, int nparams, png_charp units, png_charpp params)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_pCAL;
+   PNG_CONST PNG_pCAL;
 #endif
    png_size_t purpose_len, units_len, total_len;
    png_uint_32p params_len;
@@ -1599,7 +1599,7 @@ void /* PRIVATE */
 png_write_sCAL(png_structp png_ptr, int unit, double width, double height)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_sCAL;
+   PNG_CONST PNG_sCAL;
 #endif
    char buf[64];
    png_size_t total_len;
@@ -1639,7 +1639,7 @@ png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width,
    png_charp height)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_sCAL;
+   PNG_CONST PNG_sCAL;
 #endif
    png_byte buf[64];
    png_size_t wlen, hlen, total_len;
@@ -1674,7 +1674,7 @@ png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
    int unit_type)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_pHYs;
+   PNG_CONST PNG_pHYs;
 #endif
    png_byte buf[9];
 
@@ -1698,7 +1698,7 @@ void /* PRIVATE */
 png_write_tIME(png_structp png_ptr, png_timep mod_time)
 {
 #ifdef PNG_USE_LOCAL_ARRAYS
-   PNG_tIME;
+   PNG_CONST PNG_tIME;
 #endif
    png_byte buf[7];
 

scripts/CMakeLists.txt

@@ -6,7 +6,7 @@ project(PNG)
 
 set(PNGLIB_MAJOR 1)
 set(PNGLIB_MINOR 2)
-set(PNGLIB_RELEASE 20)
+set(PNGLIB_RELEASE 21)
 set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
 
@@ -169,7 +169,7 @@ configure_file(${PNG_SOURCE_DIR}/scripts/libpng-config.in
 
 # SET UP LINKS
 set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#    VERSION 0.${PNGLIB_RELEASE}.1.2.20
+#    VERSION 0.${PNGLIB_RELEASE}.1.2.21beta2
      VERSION 0.${PNGLIB_RELEASE}.0
      SOVERSION 0
      CLEAN_DIRECT_OUTPUT 1)

scripts/libpng-config-head.in

@@ -8,7 +8,7 @@
 
 # Modeled after libxml-config.
 
-version=1.2.20
+version=1.2.21beta2
 prefix=""
 libdir=""
 libs=""

scripts/libpng.pc-configure.in

@@ -5,6 +5,6 @@ includedir=@includedir@/libpng12
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.2.20
+Version: 1.2.21beta2
 Libs: -L${libdir} -lpng12
 Cflags: -I${includedir} @LIBPNG_NO_MMX@

scripts/libpng.pc.in

@@ -5,6 +5,6 @@ includedir=@includedir@/libpng12
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.2.20
+Version: 1.2.21beta2
 Libs: -L${libdir} -lpng12
 Cflags: -I${includedir}

scripts/makefile.32sunu

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.64sunu

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.aix

@@ -20,7 +20,7 @@ LN_SF = ln -f -s
 
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local

scripts/makefile.beos

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.cygwin

@@ -74,7 +74,7 @@ CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
 LIBNAME = libpng12
 PNGMAJ = 0
 CYGDLL = 12
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(CYGDLL).dll

scripts/makefile.darwin

@@ -19,7 +19,7 @@ ZLIBINC=../zlib
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.dec

@@ -5,7 +5,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng12
 

scripts/makefile.elf

@@ -12,7 +12,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.gcmmx

@@ -14,7 +14,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.hp64

@@ -18,7 +18,7 @@ ZLIBINC=/opt/zlib/include
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.hpgcc

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.hpux

@@ -18,7 +18,7 @@ ZLIBINC=/opt/zlib/include
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.linux

@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.mingw

@@ -74,7 +74,7 @@ CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
 LIBNAME = libpng12
 PNGMAJ = 0
 MINGDLL = 12
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=libpng$(MINGDLL).dll

scripts/makefile.ne12bsd

@@ -14,7 +14,7 @@ INCSDIR=${LOCALBASE}/include/libpng12
 
 LIB=	png12
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.2.20
+SHLIB_MINOR=	1.2.21beta2
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c

scripts/makefile.netbsd

@@ -14,7 +14,7 @@ INCSDIR=${LOCALBASE}/include/libpng
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.2.20
+SHLIB_MINOR=	1.2.21beta2
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c

scripts/makefile.nommx

@@ -7,7 +7,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.openbsd

@@ -8,7 +8,7 @@ LIBDIR=	${PREFIX}/lib
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.2.20
+SHLIB_MINOR=	1.2.21beta2
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \

scripts/makefile.sco

@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.sggcc

@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.sgi

@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.so9

@@ -8,7 +8,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng12
 

scripts/makefile.solaris

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.solaris-x86

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.20
+PNGMIN = 1.2.21beta2
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/pngos2.def

@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.2.20
+; Version 1.2.21beta2
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"

scripts/pngw32.def

@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.2.20
+;Version 1.2.21beta2
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3