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[libpng17] Update CHANGES and ANNOUNCE

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Glenn Randers-Pehrson 2016-06-07 14:46:42 -05:00
parent 2b711a751c
commit b70b51ba17
2 changed files with 32 additions and 0 deletions
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16
ANNOUNCE
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@ -1356,6 +1356,22 @@ Version 1.7.0beta81 [June 7, 2016]
appropriate debug() assert if a fill for 0 bytes occurs.
Most PNG_FLAG_ values for png_struct::flags have been eliminated (as a
result of the benign error handling changes). Only one remains.
The LOW_MEMORY PNG_COMPRESSION option should not be setting HUFFMAN_ONLY or
using a low deflate 'level'; according to the comments in zconf.h only
windowBits and memLevel affect the memory. pngwutil.c has been changed
to use the same values as HIGH compression.
The COMPAT option turned on the old optimize_cmf code (now in fix_cinfo),
however there was a serious bug in that code; it put the wrong value in
z_cmf. The setting was also not handled correctly in
pz_compression_settings.
pngtest now verifies the operation of COMPAT and, as a result, pngtest.png
has been reverted to the libpng 1.6 (etc) version.
IDAT size handling has been improved; if not explicitly set values
appropriate to png_level are now chosen (in addition to the handling for
the COMPAT setting). HIGH and HIGH_READ_SPEED now create unlimited
(up to the PNG chunk-size limit of 2^31-1 bytes) size IDAT chunks,
which requires buffering the whole of the IDAT data in memory but
reflects what other programs and optimizers do.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

16
CHANGES
View File

@ -5656,6 +5656,22 @@ Version 1.7.0beta81 [June 7, 2016]
appropriate debug() assert if a fill for 0 bytes occurs.
Most PNG_FLAG_ values for png_struct::flags have been eliminated (as a
result of the benign error handling changes). Only one remains.
The LOW_MEMORY PNG_COMPRESSION option should not be setting HUFFMAN_ONLY or
using a low deflate 'level'; according to the comments in zconf.h only
windowBits and memLevel affect the memory. pngwutil.c has been changed
to use the same values as HIGH compression.
The COMPAT option turned on the old optimize_cmf code (now in fix_cinfo),
however there was a serious bug in that code; it put the wrong value in
z_cmf. The setting was also not handled correctly in
pz_compression_settings.
pngtest now verifies the operation of COMPAT and, as a result, pngtest.png
has been reverted to the libpng 1.6 (etc) version.
IDAT size handling has been improved; if not explicitly set values
appropriate to png_level are now chosen (in addition to the handling for
the COMPAT setting). HIGH and HIGH_READ_SPEED now create unlimited
(up to the PNG chunk-size limit of 2^31-1 bytes) size IDAT chunks,
which requires buffering the whole of the IDAT data in memory but
reflects what other programs and optimizers do.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit