[devel] Imported from libpng-1.4.0beta67.tarv1.4.0beta67

30 files changed, 96 insertions, 44 deletions

diff --git a/ANNOUNCE b/ANNOUNCE
index 8f3d6efba..5d7855781 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.4.0beta67 - June 29, 2009
+Libpng 1.4.0beta67 - July 6, 2009
 
 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.
@@ -494,9 +494,10 @@ version 1.4.0beta65 [June 26, 2009]
 version 1.4.0beta66 [June 27, 2009]
   Refer to the libpng license instead of the libpng license in each file.
 
-version 1.4.0beta67 [June 29, 2009]
+version 1.4.0beta67 [July 6, 2009]
   Relocated INVERT_ALPHA within png_read_png() and png_write_png().
   Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB.
+  Added an "xcode" project to the projects directory (Alam Arias).
 
 version 1.4.0betaN [future]
   Build shared libraries with -lz and sometimes -lm.
diff --git a/CHANGES b/CHANGES
index 056675fa5..b18124060 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2171,9 +2171,10 @@ version 1.4.0beta65 [June 26, 2009]
 version 1.4.0beta66 [June 27, 2009]
   Refer to the libpng license instead of the libpng license in each file.
 
-version 1.4.0beta67 [June 29, 2009]
+version 1.4.0beta67 [July 6, 2009]
   Relocated INVERT_ALPHA within png_read_png() and png_write_png().
   Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB.
+  Added an "xcode" project to the projects directory (Alam Arias).
 
 version 1.4.0betaN [future]
   Build shared libraries with -lz and sometimes -lm.
diff --git a/INSTALL b/INSTALL
index 480b48756..684578fed 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.4.0beta67 - June 29, 2009
+Installing libpng version 1.4.0beta67 - July 6, 2009
 
 On Unix/Linux and similar systems, you can simply type
 
diff --git a/LICENSE b/LICENSE
index 6297d4ff5..0ed02019f 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.4.0beta67, June 29, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.4.0beta67, July 6, 2009, 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
@@ -108,4 +108,4 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-June 29, 2009
+July 6, 2009
diff --git a/README b/README
index 1301db5bd..487b46be7 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.4.0beta67 - June 29, 2009 (shared library 14.0)
+README for libpng version 1.4.0beta67 - July 6, 2009 (shared library 14.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
diff --git a/TODO b/TODO
index f43ef22c6..7fe1ddf10 100644
--- a/TODO
+++ b/TODO
@@ -19,8 +19,13 @@ Better filter selection
 Histogram creation.
 Text conversion between different code pages (Latin-1 -> Mac and DOS).
 Build gamma tables using fixed point (and do away with floating point entirely).
+Avoid building gamma tables whenever possible.
 Use greater precision when changing to linear gamma for compositing against
   background and doing rgb-to-gray transformation.
 Investigate pre-incremented loop counters and other loop constructions.
 Add interpolated method of handling interlacing.
+Provide for conditional compilation of 16-bit support (except for the
+  initial stripping down to 8-bits when reading a 16-bit PNG datastream).
+Switch to the simpler zlib (zlib/libpng) license if legally possible.
+
 */
diff --git a/example.c b/example.c
index 7e144ef6b..df4332b53 100644
--- a/example.c
+++ b/example.c
@@ -2,7 +2,7 @@
 #if 0 /* in case someone actually tries to compile this */
 
 /* example.c - an example of using libpng
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * This file has been placed in the public domain by the authors.
  * Maintained 1998-2009 Glenn Randers-Pehrson
  * Maintained 1996, 1997 Andreas Dilger)
diff --git a/libpng-1.4.0beta67.txt b/libpng-1.4.0beta67.txt
index 6b2be1fe4..56b14fd4b 100644
--- a/libpng-1.4.0beta67.txt
+++ b/libpng-1.4.0beta67.txt
@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.4.0beta67 - June 29, 2009
+ libpng version 1.4.0beta67 - July 6, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ libpng.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.4.0beta67 - June 29, 2009
+ libpng versions 0.97, January 1998, through 1.4.0beta67 - July 6, 2009
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -2966,6 +2966,8 @@ Some obsolete/deprecated macros and functions have been removed.
 
 The PNG_1_0_X and PNG_1_2_X macros were eliminated.
 
+The PNG_LEGACY_SUPPORTED macro was eliminated.
+
 Many WIN32_WCE #ifdefs were removed.
 
 PNG_MAX_UINT was replaced with PNG_UINT_31_MAX.  It has been
@@ -3033,6 +3035,12 @@ We removed the trailing '.' from the warning and error messages.
 We added PNG_TRANSFORM_GRAY_TO_RGB to the available high-level
 input transforms.
 
+The call to png_do_chop() in pngrtran.c, which reduces 16-bit input
+files to 8-bit bit depth, was relocated ahead of the building
+of gamma tables.  This allows us to build 8-bit tables instead
+of 16-bit tables, when only 8-bit tables are needed. This avoids 
+wasting some computing resources when the application has called
+the png_set_strip_16() function and encounters a 16-bit PNG file.
 
 X. Detecting libpng
 
@@ -3154,7 +3162,7 @@ source.
 
 XIII. Y2K Compliance in libpng
 
-June 29, 2009
+July 6, 2009
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
diff --git a/libpng.3 b/libpng.3
index 89575d28d..e92958275 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,4 +1,4 @@
-.TH LIBPNG 3 "June 29, 2009"
+.TH LIBPNG 3 "July 6, 2009"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta67
 .SH SYNOPSIS
@@ -809,7 +809,7 @@ 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 1.4.0beta67 - June 29, 2009
+ libpng version 1.4.0beta67 - July 6, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -820,7 +820,7 @@ libpng.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.4.0beta67 - June 29, 2009
+ libpng versions 0.97, January 1998, through 1.4.0beta67 - July 6, 2009
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -3775,6 +3775,8 @@ Some obsolete/deprecated macros and functions have been removed.
 
 The PNG_1_0_X and PNG_1_2_X macros were eliminated.
 
+The PNG_LEGACY_SUPPORTED macro was eliminated.
+
 Many WIN32_WCE #ifdefs were removed.
 
 PNG_MAX_UINT was replaced with PNG_UINT_31_MAX.  It has been
@@ -3842,6 +3844,12 @@ We removed the trailing '.' from the warning and error messages.
 We added PNG_TRANSFORM_GRAY_TO_RGB to the available high-level
 input transforms.
 
+The call to png_do_chop() in pngrtran.c, which reduces 16-bit input
+files to 8-bit bit depth, was relocated ahead of the building
+of gamma tables.  This allows us to build 8-bit tables instead
+of 16-bit tables, when only 8-bit tables are needed. This avoids 
+wasting some computing resources when the application has called
+the png_set_strip_16() function and encounters a 16-bit PNG file.
 
 .SH X. Detecting libpng
 
@@ -3963,7 +3971,7 @@ source.
 
 .SH XIII. Y2K Compliance in libpng
 
-June 29, 2009
+July 6, 2009
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
@@ -4193,7 +4201,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.4.0beta67 - June 29, 2009:
+Libpng version 1.4.0beta67 - July 6, 2009:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -4216,7 +4224,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.4.0beta67, June 29, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.4.0beta67, July 6, 2009, 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
@@ -4315,7 +4323,7 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-June 29, 2009
+July 6, 2009
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index f6845c577..033b7d377 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,4 +1,4 @@
-.TH LIBPNGPF 3 "June 29, 2009"
+.TH LIBPNGPF 3 "July 6, 2009"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta67
 (private functions)
diff --git a/png.5 b/png.5
index 029514a4c..6aad2cf16 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "June 29, 2009"
+.TH PNG 5 "July 6, 2009"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index 756f65802..8fb27b823 100644
--- a/png.c
+++ b/png.c
@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
@@ -652,13 +652,13 @@ png_get_copyright(png_structp png_ptr)
 #else
 #ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
-     "libpng version x 1.4.0beta67 - June 29, 2009" PNG_STRING_NEWLINE \
+     "libpng version x 1.4.0beta67 - July 6, 2009" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2009 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE);
 #else
-      return ((png_charp) "libpng version 1.4.0beta67 - June 29, 2009\
+      return ((png_charp) "libpng version 1.4.0beta67 - July 6, 2009\
       Copyright (c) 1998-2009 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");
diff --git a/png.h b/png.h
index 29874021d..74ab56c95 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.4.0beta67 - June 29, 2009
+ * libpng version 1.4.0beta67 - July 6, 2009
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -11,7 +11,7 @@
  * 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 1.4.0beta67 - June 29, 2009: Glenn
+ *  libpng versions 0.97, January 1998, through 1.4.0beta67 - July 6, 2009: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -161,7 +161,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.4.0beta67, June 29, 2009, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.4.0beta67, July 6, 2009, 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:
@@ -337,7 +337,7 @@
 /* Version information for png.h - this should match the version in png.c */
 #define PNG_LIBPNG_VER_STRING "1.4.0beta67"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.4.0beta67 - June 29, 2009\n"
+   " libpng version 1.4.0beta67 - July 6, 2009\n"
 
 #define PNG_LIBPNG_VER_SONUM   14
 #define PNG_LIBPNG_VER_DLLNUM  14
diff --git a/pngconf.h b/pngconf.h
index 493b41551..453dbc87a 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.4.0beta67 - June 29, 2009
+ * libpng version 1.4.0beta67 - July 6, 2009
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngerror.c b/pngerror.c
index e21608414..c8c6fe4b4 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -1,7 +1,7 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngget.c b/pngget.c
index 8cf1c5f8f..ca9ecd60b 100644
--- a/pngget.c
+++ b/pngget.c
@@ -1,7 +1,7 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngmem.c b/pngmem.c
index 97b8c417e..b44aec25e 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -1,7 +1,7 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngpread.c b/pngpread.c
index 1a3800708..78e530d7b 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngpriv.h b/pngpriv.h
index 893f879bf..bde193560 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -1,7 +1,7 @@
 
 /* pngpriv.h - private declarations for use inside libpng
  *
- * libpng version 1.4.0beta67 - June 29, 2009
+ * libpng version 1.4.0beta67 - July 6, 2009
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngread.c b/pngread.c
index 3120b44a5..98baac2e4 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngrio.c b/pngrio.c
index ff012d021..c3c24f6ce 100644
--- a/pngrio.c
+++ b/pngrio.c
@@ -1,7 +1,7 @@
 
 /* pngrio.c - functions for data input
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngrtran.c b/pngrtran.c
index 8a7c2f785..fa8192268 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
@@ -3952,6 +3952,35 @@ static PNG_CONST int png_gamma_shift[] =
  * tables, we don't make a full table if we are reducing to 8-bit in
  * the future.  Note also how the gamma_16 tables are segmented so that
  * we don't need to allocate > 64K chunks for a full 16-bit table.
+ *
+ * See the PNG extensions document for an integer algorithm for creating
+ * the gamma tables.  Maybe we will implement that here someday.
+ *
+ * We should only reach this point if
+ *
+ *      the file_gamma is known (i.e., the gAMA or sRGB chunk is present,
+ *      or the application has provided a file_gamma)
+ *
+ *   AND
+ *      {
+ *         the screen_gamma is known
+ *
+ *      OR
+ *
+ *         RGB_to_gray transformation is being performed
+ *      }
+ *
+ *   AND
+ *      {
+ *         the screen_gamma is different from the reciprocal of the
+ *         file_gamma by more than the specified threshold
+ *
+ *      OR
+ *
+ *         a background color has been specified and the file_gamma
+ *         and screen_gamma are not 1.0, within the specified threshold.
+ *      }
+ *
  */
 void /* PRIVATE */
 png_build_gamma_table(png_structp png_ptr)
diff --git a/pngrutil.c b/pngrutil.c
index b09ee1c1b..9e071c6cf 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngset.c b/pngset.c
index c83624565..fe1394d03 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngtest.c b/pngtest.c
index 2bdef73a4..a983d28e3 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1,7 +1,7 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngtrans.c b/pngtrans.c
index 4e9f22497..9adfb3bee 100644
--- a/pngtrans.c
+++ b/pngtrans.c
@@ -1,7 +1,7 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngwio.c b/pngwio.c
index 03c2d3591..e29c27108 100644
--- a/pngwio.c
+++ b/pngwio.c
@@ -1,7 +1,7 @@
 
 /* pngwio.c - functions for data output
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngwrite.c b/pngwrite.c
index 526c5056b..a27f63765 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1,7 +1,7 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngwtran.c b/pngwtran.c
index 43003161a..58c167968 100644
--- a/pngwtran.c
+++ b/pngwtran.c
@@ -1,7 +1,7 @@
 
 /* pngwtran.c - transforms the data in a row for PNG writers
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)
diff --git a/pngwutil.c b/pngwutil.c
index ce02c2b66..c1c2d609e 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.4.0 [June 29, 2009]
+ * Last changed in libpng 1.4.0 [July 6, 2009]
  * Copyright (c) 1998-2009 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.)