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[devel] Implementation of premultiplied alpha support: png_set_alpha_mode

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(libpng-manual.txt still to be updated, see png.h for documentation.)
This commit is contained in:
John Bowler
2011-05-07 21:00:28 -05:00
committed by Glenn Randers-Pehrson
parent af855e415d
commit d273ad2d0f
12 changed files with 2128 additions and 607 deletions
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13
test-pngvalid-full.sh
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@@ -7,9 +7,18 @@ echo >> pngtest-log.txt
echo "============ pngvalid-full.sh ==============" >> pngtest-log.txt
echo "Running test-pngvalid-full.sh"
for gamma in threshold transform sbit 16-to-8
for gamma in threshold transform sbit 16-to-8 background alpha-mode
do
if ./pngvalid "--gamma-$gamma" >> pngtest-log.txt 2>&1
# For the moment the composition calculation is performed with minimal
# accuracy, do this to work round the problem:
if test $gamma = background -o $gamma = alpha-mode
then
opts=--use-linear-precision
else
opts=
fi
if ./pngvalid $opts "--gamma-$gamma" >> pngtest-log.txt 2>&1
then
echo " PASS:" pngvalid "--gamma-$gamma"
else