tests/pngstest-* are changed so that the new test files are divided into 8
groups by gamma and alpha channel. This makes each test take just under 5
seconds on a moderately up-to-date x86_64 system using libpng16 (test times are
somewhat variable under libpng17 at present because of the lack of optimization
in some gamma processing paths.)
These tests have considerably better code and pixel-value coverage than
contrib/pngsuite however coverage is still incomplete.
Signed-off-by: John Bowler <jbowler@acm.org>
pngimage: add --list-combos
pngunknown: add --strict to catch warnings
pngvalid-standard: remove the spurious --progressive read (compare with
pngvalid-progressive-standard!)
This patch probably applies to 1.5 and 1.6 (where the tests exist) too.
Signed-off-by: John Bowler <jbowler@acm.org>
scripts. Fixed combination of ~alpha with shift. On read invert alpha,
processing occurred after shift processing, which causes the final values to be
outside the range that should be produced by the shift. Reversing the
order on read makes the two transforms work together correctly and mirrors
the order used on write.
the massive speed improvements use a make capable of parallel builds
on a multi-CPU machine and pass the right arguments to make (-j10000
for GNU make) to get the build to run in parallel.
