ANNOUNCE - third_party/libpng - Git at Google


 Libpng 1.6.1beta07 - March 7, 2013

 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

    1.6.1beta07.tar.xz (LZMA-compressed, recommended)
    1.6.1beta07.tar.gz

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

    lp161b07.7z  (LZMA-compressed, recommended)
    lp161b07.zip

 Other information:

    1.6.1beta07-README.txt
    1.6.1beta07-LICENSE.txt

 Changes since the last public release (1.6.0):

 Version 1.6.1beta01 [February 16, 2013]
   Made symbol prefixing work with the ARM neon optimizations. Also allow
     pngpriv.h to be included for preprocessor definitions only, so it can
     be used in non-C/C++ files. Back ported from libpng 1.7.
   Made sRGB check numbers consistent.
   Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug.
   Removed cc -E workround, corrected png_get_palette_max API Tested on
     SUN OS cc 5.9, which demonstrates the tokenization problem previously
     avoided by using /lib/cpp.  Since all .dfn output is now protected in
     double quotes unless it is to be macro substituted the fix should
     work everywhere.
   Enabled parallel tests - back ported from libpng-1.7.
   scripts/pnglibconf.dfa formatting improvements back ported from libpng17.
   Fixed a race condition in the creation of the build 'scripts' directory
     while building with a parallel make.
   Use approved/supported Android method to check for NEON, use Linux/POSIX
     1003.1 API to check /proc/self/auxv avoiding buffer allocation and other
     library calls (ported from libpng15).

 Version 1.6.1beta02 [February 19, 2013]
   Use parentheses more consistently in "#if defined(MACRO)" tests.
   Folded long lines.
   Reenabled code to allow zero length PLTE chunks for MNG.

 Version 1.6.1beta03 [February 22, 2013]
   Fixed ALIGNED_MEMORY support.
   Allow run-time ARM NEON checking to be disabled. A new configure option:
     --enable-arm-neon=always will stop the run-time checks. New checks
     within arm/arm_init.c will cause the code not to be compiled unless
     __ARM_NEON__ is set. This should make it fail safe (if someone asks
     for it on then the build will fail if it can't be done.)
   Updated the INSTALL document.

 Version 1.6.1beta04 [February 27, 2013]
   Revised INSTALL to recommend using CPPFLAGS instead of INCLUDES.
   Revised scripts/makefile.freebsd to respect ZLIBLIB and ZLIBINC.
   Revised scripts/dfn.awk to work with the buggy MSYS awk that has trouble
     with CRLF line endings.

 Version 1.6.1beta05 [March 1, 2013]
   Avoid a possible memory leak in contrib/gregbook/readpng.c


 Version 1.6.1beta06 [March 4, 2013]
   Better documentation of unknown handling API interactions.
   Corrected Android builds and corrected libpng.vers with symbol
     prefixing This adds an API to set optimization options externally,
     providing an alternative and general solution for the non-portable
     run-time tests used by the ARM Neon code.  It also makes those tests
     compile and link on Android.
   The order of settings vs options in pnglibconf.h is reversed to allow
     settings to depend on options and options can now set (or override) the
     defaults for settings.

 Version 1.6.1beta07 [March 7, 2013]
   Corrected simplified API default gamma for color-mapped output, added
     a flag to change default. In 1.6.0 when the simplified API was used
     to produce color-mapped output from an input image with no gamma
     information the gamma assumed for the input could be different from
     that assumed for non-color-mapped output.  In particular 16-bit depth
     input files were assumed to be sRGB encoded, whereas in the 'direct'
     case they were assumed to have linear data.  This was an error.  The
     fix makes the simplified API treat all input files the same way and
     adds a new flag to the png_image::flags member to allow the
     application/user to specify that 16-bit files contain sRGB data
     rather than the default linear.
   Fixed bugs in the pngpixel and makepng test programs.

 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 1.6.1beta07 - March 7, 2013

	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

	1.6.1beta07.tar.xz (LZMA-compressed, recommended)
	1.6.1beta07.tar.gz

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

	lp161b07.7z (LZMA-compressed, recommended)
	lp161b07.zip

	Other information:

	1.6.1beta07-README.txt
	1.6.1beta07-LICENSE.txt

	Changes since the last public release (1.6.0):

	Version 1.6.1beta01 [February 16, 2013]
	Made symbol prefixing work with the ARM neon optimizations. Also allow
	pngpriv.h to be included for preprocessor definitions only, so it can
	be used in non-C/C++ files. Back ported from libpng 1.7.
	Made sRGB check numbers consistent.
	Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug.
	Removed cc -E workround, corrected png_get_palette_max API Tested on
	SUN OS cc 5.9, which demonstrates the tokenization problem previously
	avoided by using /lib/cpp. Since all .dfn output is now protected in
	double quotes unless it is to be macro substituted the fix should
	work everywhere.
	Enabled parallel tests - back ported from libpng-1.7.
	scripts/pnglibconf.dfa formatting improvements back ported from libpng17.
	Fixed a race condition in the creation of the build 'scripts' directory
	while building with a parallel make.
	Use approved/supported Android method to check for NEON, use Linux/POSIX
	1003.1 API to check /proc/self/auxv avoiding buffer allocation and other
	library calls (ported from libpng15).

	Version 1.6.1beta02 [February 19, 2013]
	Use parentheses more consistently in "#if defined(MACRO)" tests.
	Folded long lines.
	Reenabled code to allow zero length PLTE chunks for MNG.

	Version 1.6.1beta03 [February 22, 2013]
	Fixed ALIGNED_MEMORY support.
	Allow run-time ARM NEON checking to be disabled. A new configure option:
	--enable-arm-neon=always will stop the run-time checks. New checks
	within arm/arm_init.c will cause the code not to be compiled unless
	__ARM_NEON__ is set. This should make it fail safe (if someone asks
	for it on then the build will fail if it can't be done.)
	Updated the INSTALL document.

	Version 1.6.1beta04 [February 27, 2013]
	Revised INSTALL to recommend using CPPFLAGS instead of INCLUDES.
	Revised scripts/makefile.freebsd to respect ZLIBLIB and ZLIBINC.
	Revised scripts/dfn.awk to work with the buggy MSYS awk that has trouble
	with CRLF line endings.

	Version 1.6.1beta05 [March 1, 2013]
	Avoid a possible memory leak in contrib/gregbook/readpng.c


	Version 1.6.1beta06 [March 4, 2013]
	Better documentation of unknown handling API interactions.
	Corrected Android builds and corrected libpng.vers with symbol
	prefixing This adds an API to set optimization options externally,
	providing an alternative and general solution for the non-portable
	run-time tests used by the ARM Neon code. It also makes those tests
	compile and link on Android.
	The order of settings vs options in pnglibconf.h is reversed to allow
	settings to depend on options and options can now set (or override) the
	defaults for settings.

	Version 1.6.1beta07 [March 7, 2013]
	Corrected simplified API default gamma for color-mapped output, added
	a flag to change default. In 1.6.0 when the simplified API was used
	to produce color-mapped output from an input image with no gamma
	information the gamma assumed for the input could be different from
	that assumed for non-color-mapped output. In particular 16-bit depth
	input files were assumed to be sRGB encoded, whereas in the 'direct'
	case they were assumed to have linear data. This was an error. The
	fix makes the simplified API treat all input files the same way and
	adds a new flag to the png_image::flags member to allow the
	application/user to specify that 16-bit files contain sRGB data
	rather than the default linear.
	Fixed bugs in the pngpixel and makepng test programs.

	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