ANNOUNCE - third_party/libpng - Git at Google


 Libpng 1.2.19rc1 - July 31, 2007

 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-1.2.19rc1.tar.gz
    libpng-1.2.19rc1.tar.bz2

 Source files with LF line endings (for Unix/Linux) without the
 "configure" script

    libpng-1.2.19rc1-no-config.tar.gz
    libpng-1.2.19rc1-no-config.tar.bz2

 Source files with CRLF line endings (for Windows), without the
 "configure" script

    lp1219r01.zip
    lp1219r01.tar.bz2

 Project files

    libpng-1.2.19rc1-project-netware.zip
    libpng-1.2.19rc1-project-wince.zip

 Other information:

    libpng-1.2.19rc1-README.txt
    libpng-1.2.19rc1-KNOWNBUGS.txt
    libpng-1.2.19rc1-LICENSE.txt
    libpng-1.2.19rc1-Y2K-compliance.txt

 Changes since the last public release (1.2.18):

 version 1.2.19beta1 [May 18, 2007]
   Changed "const static" to "static PNG_CONST" everywhere, mostly undoing
     change of libpng-1.2.17beta2.  Changed other "const" to "PNG_CONST"

 version 1.2.19beta2 [May 18, 2007]
   Fixed png_do_expand() to only use the appropriate bits of tRNS value.

 version 1.2.19beta3 [May 20, 2007]
   Add some "png_byte" typecasts in png_check_keyword().
   Write new_key instead of key in zTXt chunk.

 version 1.2.19beta4 [May 21, 2007]
   Add png_snprintf() function and use it in place of sprint() for improved
     defense against buffer overflows.

 version 1.2.19beta5 [May 21, 2007]
   Fixed png_handle_tRNS() to only use the appropriate bits of tRNS value.
   Changed handling of more unused parameters, to avoid compiler warnings.
   Removed some PNG_CONST in pngwutil.c to avoid compiler warnings.

 version 1.2.19beta6 [May 22, 2007]
   Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c
   Added a special "_MSC_VER" case that defines png_snprintf to _snprintf

 version 1.2.19beta7 [May 22, 2007]
   Squelched png_squelch_warnings() in pnggccrd.c and added an
     #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
     the warnings that png_squelch_warnings was squelching.

 version 1.2.19beta8 [May 22, 2007]
   Removed __MMX__ from test in pngconf.h.

 version 1.2.19beta9 [May 23, 2007]
   Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro.
   Revised png_squelch_warnings() so it might work.
   Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86.

 version 1.2.19beta10 [May 24, 2007]
   Resquelched png_squelch_warnings(), use "__attribute__((used))" instead.

 version 1.2.19beta11 [May 28, 2007]
   Return 0 from png_get_sPLT() and png_get_unknown_chunks() if png_ptr is NULL;
     changed three remaining instances of png_strcpy() to png_strncpy() (David
     Hill).
   Make test for NULL row_buf at the beginning of png_do_read_transformations
     unconditional.

 version 1.2.19beta12 [May 28, 2007]
   Revised pnggccrd.c.

 version 1.2.19beta13 [June 14, 2007]
   Prefer PNG_USE_PNGVCRD when _MSC_VER is defined in pngconf.h

 version 1.2.19beta14 [June 16, 2007]
   Fix bug with handling of 16-bit transparency, introduced in 1.2.19beta2

 version 1.2.19beta15 [June 17, 2007]
   Revised pnggccrd.c.

 version 1.2.19beta16 [June 18, 2007]
   Revised pnggccrd.c again.
   Updated contrib/gregbook.
   Changed '#include "pnggccrd.c"' to 'include "$srcdir/pnggccrd.c"'
     in configure.ac

 version 1.2.19beta17 [June 19, 2007]
   Revised many of the makefiles, to set -DPNG_NO_MMX_CODE where needed
     and to not use -O3 unless -DPNG_NO_MMX_CODE is also set.

 version 1.2.19beta18 [June 23, 2007]
   Replaced some C++ style comments with C style comments in pnggccrd.c.
   Copied optimized C code from pnggccrd.c to pngrutil.c, removed dependency
     on pnggccrd.o from many makefiles.
   Added sl and dylib to list of extensions be installed by Makefile.am

 version 1.2.19beta19 [June 28, 2007]
   Fixed testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN in pngrtran.c
   More cleanup of pnggccrd.c and pngvcrd.c

 version 1.2.19beta20 [June 29, 2007]
   Rebuilt Makefile.in and configure using libtool-1.5.24.
   Fixed typo in pnggccrd.c

 version 1.2.19beta21 [June 30, 2007]
   More revision of pnggccrd.c
   Added "test" target to Makefile.in and Makefile.am

 version 1.2.19beta22 [July 3, 2007]
   Added info about pngrutil/pnggccrd/pngvcrd to png_get_header_version()
   Fix type definition of dummy_value_a, b in pnggccrd.c

 version 1.2.19beta23 [July 10, 2007]
   Revert change to type definition of dummy_value_a, b in pnggccrd.c
   Make sure __PIC__ is defined in pnggccrd.c when PIC is defined.
   Make PNG_NO_MMX_CODE the default on x86_64 GNUC platforms.

 version 1.2.19beta24 [July 14, 2007]
   Added PNG_NO_READ_FILTER, PNG_NO_WRITE_FILTER, PNG_NO_WARNING macros.
   Added contrib/pngminim to demonstrate building minimal encoder and decoder

 version 1.2.19beta25 [July 15, 2007]
   Removed the new PNG_NO_READ_FILTER macro since it would make the library
     unable to read valid PNG files, and filtering is at the heart of the
     PNG format.

 version 1.2.19beta26 [July 16, 2007]
   Changed "png_free(str)" to "png_free(png_ptr,str)" in pngrutil.c WinCE
     code (Yves Piguet).  This bug was introduced in libpng-1.2.14.
   Updated scripts/CMakeLists.txt
   Relocated a misplaced #endif in pnggccrd.c

 version 1.2.19beta27 [July 17, 2007]
   Fixed incorrect stride and number of bytes copied (was 4 instead of
     6 bytes) in the cleanup loop of pnggccrd.c and pngvcrd.c for handling
     the end of 48-bit interlaced rows (Glenn R-P).

 version 1.2.19beta28 [July 19, 2007]
   Removed requirement for gcc-4.1 or better to use PNG_HAVE_MMX_FILTER_ROW
     on x86_64 platforms
   Added png_warning() in pngrutil.c for short iCCP, iTXt, sPLT, or zTXT chunks.
   Revised pngtest.c so warnings are displayed regardless of PNG_NO_STDIO.

 version 1.2.19beta30 [July 26, 2007]
   Revised pnggccrd.c

 version 1.2.19beta31 [July 27, 2007]
   Fix typos in pnggccrd.c

 version 1.2.19beta32 [July 31, 2007]
   Disable PNG_MMX_CODE_SUPPORTED when PNG_ASSEMBLER_CODE_SUPPORTED is off.
   Enable PNG_MMX_READ_FILTER_* by default (they were inadvertently disabled in
     libpng-1.2.19beta23).
   Fix some debugging statements in pnggccrd.c and pngrutil.c
   Added information about disabling the MMX code in libpng documentation.


 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

 Glenn R-P

	Libpng 1.2.19rc1 - July 31, 2007

	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-1.2.19rc1.tar.gz
	libpng-1.2.19rc1.tar.bz2

	Source files with LF line endings (for Unix/Linux) without the
	"configure" script

	libpng-1.2.19rc1-no-config.tar.gz
	libpng-1.2.19rc1-no-config.tar.bz2

	Source files with CRLF line endings (for Windows), without the
	"configure" script

	lp1219r01.zip
	lp1219r01.tar.bz2

	Project files

	libpng-1.2.19rc1-project-netware.zip
	libpng-1.2.19rc1-project-wince.zip

	Other information:

	libpng-1.2.19rc1-README.txt
	libpng-1.2.19rc1-KNOWNBUGS.txt
	libpng-1.2.19rc1-LICENSE.txt
	libpng-1.2.19rc1-Y2K-compliance.txt

	Changes since the last public release (1.2.18):

	version 1.2.19beta1 [May 18, 2007]
	Changed "const static" to "static PNG_CONST" everywhere, mostly undoing
	change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST"

	version 1.2.19beta2 [May 18, 2007]
	Fixed png_do_expand() to only use the appropriate bits of tRNS value.

	version 1.2.19beta3 [May 20, 2007]
	Add some "png_byte" typecasts in png_check_keyword().
	Write new_key instead of key in zTXt chunk.

	version 1.2.19beta4 [May 21, 2007]
	Add png_snprintf() function and use it in place of sprint() for improved
	defense against buffer overflows.

	version 1.2.19beta5 [May 21, 2007]
	Fixed png_handle_tRNS() to only use the appropriate bits of tRNS value.
	Changed handling of more unused parameters, to avoid compiler warnings.
	Removed some PNG_CONST in pngwutil.c to avoid compiler warnings.

	version 1.2.19beta6 [May 22, 2007]
	Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c
	Added a special "_MSC_VER" case that defines png_snprintf to _snprintf

	version 1.2.19beta7 [May 22, 2007]
	Squelched png_squelch_warnings() in pnggccrd.c and added an
	#ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
	the warnings that png_squelch_warnings was squelching.

	version 1.2.19beta8 [May 22, 2007]
	Removed __MMX__ from test in pngconf.h.

	version 1.2.19beta9 [May 23, 2007]
	Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro.
	Revised png_squelch_warnings() so it might work.
	Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86.

	version 1.2.19beta10 [May 24, 2007]
	Resquelched png_squelch_warnings(), use "__attribute__((used))" instead.

	version 1.2.19beta11 [May 28, 2007]
	Return 0 from png_get_sPLT() and png_get_unknown_chunks() if png_ptr is NULL;
	changed three remaining instances of png_strcpy() to png_strncpy() (David
	Hill).
	Make test for NULL row_buf at the beginning of png_do_read_transformations
	unconditional.

	version 1.2.19beta12 [May 28, 2007]
	Revised pnggccrd.c.

	version 1.2.19beta13 [June 14, 2007]
	Prefer PNG_USE_PNGVCRD when _MSC_VER is defined in pngconf.h

	version 1.2.19beta14 [June 16, 2007]
	Fix bug with handling of 16-bit transparency, introduced in 1.2.19beta2

	version 1.2.19beta15 [June 17, 2007]
	Revised pnggccrd.c.

	version 1.2.19beta16 [June 18, 2007]
	Revised pnggccrd.c again.
	Updated contrib/gregbook.
	Changed '#include "pnggccrd.c"' to 'include "$srcdir/pnggccrd.c"'
	in configure.ac

	version 1.2.19beta17 [June 19, 2007]
	Revised many of the makefiles, to set -DPNG_NO_MMX_CODE where needed
	and to not use -O3 unless -DPNG_NO_MMX_CODE is also set.

	version 1.2.19beta18 [June 23, 2007]
	Replaced some C++ style comments with C style comments in pnggccrd.c.
	Copied optimized C code from pnggccrd.c to pngrutil.c, removed dependency
	on pnggccrd.o from many makefiles.
	Added sl and dylib to list of extensions be installed by Makefile.am

	version 1.2.19beta19 [June 28, 2007]
	Fixed testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN in pngrtran.c
	More cleanup of pnggccrd.c and pngvcrd.c

	version 1.2.19beta20 [June 29, 2007]
	Rebuilt Makefile.in and configure using libtool-1.5.24.
	Fixed typo in pnggccrd.c

	version 1.2.19beta21 [June 30, 2007]
	More revision of pnggccrd.c
	Added "test" target to Makefile.in and Makefile.am

	version 1.2.19beta22 [July 3, 2007]
	Added info about pngrutil/pnggccrd/pngvcrd to png_get_header_version()
	Fix type definition of dummy_value_a, b in pnggccrd.c

	version 1.2.19beta23 [July 10, 2007]
	Revert change to type definition of dummy_value_a, b in pnggccrd.c
	Make sure __PIC__ is defined in pnggccrd.c when PIC is defined.
	Make PNG_NO_MMX_CODE the default on x86_64 GNUC platforms.

	version 1.2.19beta24 [July 14, 2007]
	Added PNG_NO_READ_FILTER, PNG_NO_WRITE_FILTER, PNG_NO_WARNING macros.
	Added contrib/pngminim to demonstrate building minimal encoder and decoder

	version 1.2.19beta25 [July 15, 2007]
	Removed the new PNG_NO_READ_FILTER macro since it would make the library
	unable to read valid PNG files, and filtering is at the heart of the
	PNG format.

	version 1.2.19beta26 [July 16, 2007]
	Changed "png_free(str)" to "png_free(png_ptr,str)" in pngrutil.c WinCE
	code (Yves Piguet). This bug was introduced in libpng-1.2.14.
	Updated scripts/CMakeLists.txt
	Relocated a misplaced #endif in pnggccrd.c

	version 1.2.19beta27 [July 17, 2007]
	Fixed incorrect stride and number of bytes copied (was 4 instead of
	6 bytes) in the cleanup loop of pnggccrd.c and pngvcrd.c for handling
	the end of 48-bit interlaced rows (Glenn R-P).

	version 1.2.19beta28 [July 19, 2007]
	Removed requirement for gcc-4.1 or better to use PNG_HAVE_MMX_FILTER_ROW
	on x86_64 platforms
	Added png_warning() in pngrutil.c for short iCCP, iTXt, sPLT, or zTXT chunks.
	Revised pngtest.c so warnings are displayed regardless of PNG_NO_STDIO.

	version 1.2.19beta30 [July 26, 2007]
	Revised pnggccrd.c

	version 1.2.19beta31 [July 27, 2007]
	Fix typos in pnggccrd.c

	version 1.2.19beta32 [July 31, 2007]
	Disable PNG_MMX_CODE_SUPPORTED when PNG_ASSEMBLER_CODE_SUPPORTED is off.
	Enable PNG_MMX_READ_FILTER_* by default (they were inadvertently disabled in
	libpng-1.2.19beta23).
	Fix some debugging statements in pnggccrd.c and pngrutil.c
	Added information about disabling the MMX code in libpng documentation.


	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

	Glenn R-P