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[libpng17]Rearranged png_struct, remove unused members, change png_set_filter

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handling png_struct members rearranged - partly to reorder to avoid packing,
partly to put frequently accessed members at the start and partly to make
the grouping more clear. png_set_filter code has been rewritten and the
code shared with png_write_start_row moved to a common function.  Comments
in png.h have been made more clear. Minor fixes to
contrib/libtests/timepng.c and some of the png_*_tRNS logic, including
more error detection in png_set_tRNS.
This commit is contained in:
John Bowler
2012-12-14 22:31:50 -06:00
committed by Glenn Randers-Pehrson
parent 3e42c81193
commit 240ac287eb
11 changed files with 49 additions and 31 deletions
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12
ANNOUNCE
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@@ -1,5 +1,5 @@
Libpng 1.7.0alpha01 - December 10, 2012
Libpng 1.7.0alpha01 - December 15, 2012
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.
@@ -26,7 +26,7 @@ Other information:
Changes since the last public release (1.6.0):
Version 1.7.0alpha01 [December 10, 2012]
Version 1.7.0alpha01 [December 15, 2012]
Started 1.7.0 branch from libpng-1.6.0beta33.
Made 8-bit compose and rgb_to_grayscale accuracy improvements. These
changes cause 16-bit arithmetic to be used for 8-bit data in the gamma
@@ -45,6 +45,14 @@ Version 1.7.0alpha01 [December 10, 2012]
more calculations and the algorithm used to minimize the number of
calculations has been extended to all the 16-bit tables; it has advantages
for any significant gamma correction.
Rearranged png_struct, remove unused members, change png_set_filter handling
png_struct members rearranged - partly to reorder to avoid packing, partly
to put frequently accessed members at the start and partly to make
the grouping more clear. png_set_filter code has been rewritten and the
code shared with png_write_start_row moved to a common function. Comments
in png.h have been made more clear. Minor fixes to
contrib/libtests/timepng.c and some of the png_*_tRNS logic, including
more error detection in png_set_tRNS.
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