ANNOUNCE - platform/external/libpng - Gitiles

 Libpng 1.6.24beta03 - June 23, 2016

 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

    1.6.24beta03.tar.xz (LZMA-compressed, recommended)
    1.6.24beta03.tar.gz

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

    lp1624b03.7z  (LZMA-compressed, recommended)
    lp1624b03.zip

 Other information:

    1.6.24beta03-README.txt
    1.6.24beta03-LICENSE.txt
    libpng-1.6.24beta03-*.asc (armored detached GPG signatures)

 Changes since the last public release (1.6.23):

 Version 1.6.24beta01 [June 11, 2016]
   Avoid potential overflow of the PNG_IMAGE_SIZE macro.  This macro
     is not used within libpng, but is used in some of the examples.

 Version 1.6.24beta02 [June 23, 2016]
   Correct filter heuristic overflow handling. This was broken when the
     write filter code was moved out-of-line; if there is a single filter and
     the heuristic sum overflows the calculation of the filtered line is not
     completed.  In versions prior to 1.6 the code was duplicated in-line
     and the check not performed, so the filter operation completed; however,
     in the multi-filter case where the sum is performed the 'none' filter would
     be selected if all the sums overflowed, even if it wasn't in the filter
     list.  The fix to the first problem is simply to provide PNG_SIZE_MAX as
     the current lmins sum value; this means the sum can never exceed it and
     overflows silently.  A reasonable compiler that does choose to inline
     the code will simply eliminate the sum check.
   The fix to the second problem is to use high precision arithmetic (this is
     implemented in 1.7), however a simple safe fix here is to chose the lowest
     numbered filter in the list from png_set_filter (this only works if the
     first problem is also fixed) (John Bowler).
   Use a more efficient absolute value calculation on SSE2 (Matthieu Darbois).

 Version 1.6.24beta03 [June 23, 2016]

 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 1.6.24beta03 - June 23, 2016

	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

	1.6.24beta03.tar.xz (LZMA-compressed, recommended)
	1.6.24beta03.tar.gz

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

	lp1624b03.7z (LZMA-compressed, recommended)
	lp1624b03.zip

	Other information:

	1.6.24beta03-README.txt
	1.6.24beta03-LICENSE.txt
	libpng-1.6.24beta03-*.asc (armored detached GPG signatures)

	Changes since the last public release (1.6.23):

	Version 1.6.24beta01 [June 11, 2016]
	Avoid potential overflow of the PNG_IMAGE_SIZE macro. This macro
	is not used within libpng, but is used in some of the examples.

	Version 1.6.24beta02 [June 23, 2016]
	Correct filter heuristic overflow handling. This was broken when the
	write filter code was moved out-of-line; if there is a single filter and
	the heuristic sum overflows the calculation of the filtered line is not
	completed. In versions prior to 1.6 the code was duplicated in-line
	and the check not performed, so the filter operation completed; however,
	in the multi-filter case where the sum is performed the 'none' filter would
	be selected if all the sums overflowed, even if it wasn't in the filter
	list. The fix to the first problem is simply to provide PNG_SIZE_MAX as
	the current lmins sum value; this means the sum can never exceed it and
	overflows silently. A reasonable compiler that does choose to inline
	the code will simply eliminate the sum check.
	The fix to the second problem is to use high precision arithmetic (this is
	implemented in 1.7), however a simple safe fix here is to chose the lowest
	numbered filter in the list from png_set_filter (this only works if the
	first problem is also fixed) (John Bowler).
	Use a more efficient absolute value calculation on SSE2 (Matthieu Darbois).

	Version 1.6.24beta03 [June 23, 2016]

	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