ANNOUNCE - third_party/libpng - Git at Google


 Libpng 1.5.5beta07 - September 8, 2011

 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

    1.5.5beta07.tar.xz (LZMA-compressed, recommended)
    1.5.5beta07.tar.gz
    1.5.5beta07.tar.bz2

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

    lp155b07.7z  (LZMA-compressed, recommended)
    lp155b07.zip

 Other information:

    1.5.5beta07-README.txt
    1.5.5beta07-LICENSE.txt

 Changes since the last public release (1.5.4):

 Version 1.5.5beta01 [July 13, 2011]
   Fixed some typos and made other minor changes in the manual.
   Updated contrib/pngminus/makefile.std (Samuli Souminen)

 Version 1.5.5beta02 [July 14, 2011]
   Revised Makefile.am and Makefile.in to look in the right directory for
     pnglibconf.h.prebuilt

 Version 1.5.5beta03 [July 27, 2011]
   Enabled compilation with g++ compiler.  This compiler does not recognize
     the file extension, so it always compiles with C++ rules.  Made minor
     changes to pngrutil.c to cast results where C++ expects it but C does not.
   Minor editing of libpng.3 and libpng-manual.txt.

 Version 1.5.5beta04 [July 29, 2011]
   Revised CMakeLists.txt (Clifford Yapp)
   Updated commentary about the png_rgb_to_gray() default coefficients
     in the manual and in pngrtran.c

 Version 1.5.5beta05 [August 17, 2011]
   Prevent unexpected API exports from non-libpng DLLs on Windows.  The "_DLL"
     is removed from the test of whether a DLL is being built (this erroneously
     caused the libpng APIs to be marked as DLL exports in static builds under
     Microsoft Visual Studio).  Almost all of the libpng building configuration
     is moved from pngconf.h to pngpriv.h, but PNG_DLL_EXPORT remains in
     pngconf.h, though, so that it is colocated with the import definition (it
     is no longer used anywhere in the installed headers).  The VStudio project
     definitions have been cleaned up: "_USRDLL" has been removed from the
     static library builds (this was incorrect), and PNG_USE_DLL has been added
     to pngvalid to test the functionality (pngtest does not supply it,
     deliberately).  The spurious "_EXPORTS" has been removed from the
     libpng build (all these errors were a result of copy/paste between project
     configurations.)
   Added new types and internal functions for CIE RGB end point handling to
     pngpriv.h (functions yet to be implemented).

 Version 1.5.5beta06 [August 26, 2011]
   Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set in CMakeLists.txt
     (Clifford Yap)
   Fixes to rgb_to_gray and cHRM XYZ APIs (John Bowler):
     The rgb_to_gray code had errors when combined with gamma correction.
     Some pixels were treated as true grey when they weren't and such pixels
     and true grey ones were not gamma corrected (the original value of the
     red component was used instead).  APIs to get and set cHRM using color
     space end points have been added and the rgb_to_gray code that defaults
     based on cHRM, and the divide-by-zero bug in png_handle_cHRM (introduced
     in 1.5.4) have been corrected.
   A considerable number of tests has been added to pngvalid for the
     rgb_to_gray transform.
   Arithmetic errors in rgb_to_gray whereby the calculated gray value was
     truncated to the bit depth rather than rounded have been fixed except in
     the 8-bit non-gamma-corrected case (where consistency seems more important
     than correctness.)  The code still has considerable inaccuracies in the
     8-bit case because 8-bit linear arithmetic is used.

 Version 1.5.5beta07 [September 8, 2011]
   Added "$(ARCH)" option to makefile.darwin
   Added SunOS support to configure.ac and Makefile.am
   Changed png_chunk_benign_error() to png_warning() in png.c, in
     png_XYZ_from_xy_checked

 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 1.5.5beta07 - September 8, 2011

	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

	1.5.5beta07.tar.xz (LZMA-compressed, recommended)
	1.5.5beta07.tar.gz
	1.5.5beta07.tar.bz2

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

	lp155b07.7z (LZMA-compressed, recommended)
	lp155b07.zip

	Other information:

	1.5.5beta07-README.txt
	1.5.5beta07-LICENSE.txt

	Changes since the last public release (1.5.4):

	Version 1.5.5beta01 [July 13, 2011]
	Fixed some typos and made other minor changes in the manual.
	Updated contrib/pngminus/makefile.std (Samuli Souminen)

	Version 1.5.5beta02 [July 14, 2011]
	Revised Makefile.am and Makefile.in to look in the right directory for
	pnglibconf.h.prebuilt

	Version 1.5.5beta03 [July 27, 2011]
	Enabled compilation with g++ compiler. This compiler does not recognize
	the file extension, so it always compiles with C++ rules. Made minor
	changes to pngrutil.c to cast results where C++ expects it but C does not.
	Minor editing of libpng.3 and libpng-manual.txt.

	Version 1.5.5beta04 [July 29, 2011]
	Revised CMakeLists.txt (Clifford Yapp)
	Updated commentary about the png_rgb_to_gray() default coefficients
	in the manual and in pngrtran.c

	Version 1.5.5beta05 [August 17, 2011]
	Prevent unexpected API exports from non-libpng DLLs on Windows. The "_DLL"
	is removed from the test of whether a DLL is being built (this erroneously
	caused the libpng APIs to be marked as DLL exports in static builds under
	Microsoft Visual Studio). Almost all of the libpng building configuration
	is moved from pngconf.h to pngpriv.h, but PNG_DLL_EXPORT remains in
	pngconf.h, though, so that it is colocated with the import definition (it
	is no longer used anywhere in the installed headers). The VStudio project
	definitions have been cleaned up: "_USRDLL" has been removed from the
	static library builds (this was incorrect), and PNG_USE_DLL has been added
	to pngvalid to test the functionality (pngtest does not supply it,
	deliberately). The spurious "_EXPORTS" has been removed from the
	libpng build (all these errors were a result of copy/paste between project
	configurations.)
	Added new types and internal functions for CIE RGB end point handling to
	pngpriv.h (functions yet to be implemented).

	Version 1.5.5beta06 [August 26, 2011]
	Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set in CMakeLists.txt
	(Clifford Yap)
	Fixes to rgb_to_gray and cHRM XYZ APIs (John Bowler):
	The rgb_to_gray code had errors when combined with gamma correction.
	Some pixels were treated as true grey when they weren't and such pixels
	and true grey ones were not gamma corrected (the original value of the
	red component was used instead). APIs to get and set cHRM using color
	space end points have been added and the rgb_to_gray code that defaults
	based on cHRM, and the divide-by-zero bug in png_handle_cHRM (introduced
	in 1.5.4) have been corrected.
	A considerable number of tests has been added to pngvalid for the
	rgb_to_gray transform.
	Arithmetic errors in rgb_to_gray whereby the calculated gray value was
	truncated to the bit depth rather than rounded have been fixed except in
	the 8-bit non-gamma-corrected case (where consistency seems more important
	than correctness.) The code still has considerable inaccuracies in the
	8-bit case because 8-bit linear arithmetic is used.

	Version 1.5.5beta07 [September 8, 2011]
	Added "$(ARCH)" option to makefile.darwin
	Added SunOS support to configure.ac and Makefile.am
	Changed png_chunk_benign_error() to png_warning() in png.c, in
	png_XYZ_from_xy_checked

	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