3 Commits

Author SHA1 Message Date
Glenn Randers-Pehrson
2d032e966d [libpng17' Restored a line, "c = b;", that was inadvertently deleted from the
PAETH filtering code from libpng-1.7.0beta24/pngrutil.c and reenabled
the pngimage tests.
2014-02-05 15:19:13 -06:00
Glenn Randers-Pehrson
8dd3784f7c [libpng17] Disabled pngimage tests temporarily. 2014-02-05 13:22:13 -06:00
John Bowler
dc63b03da1 [libpng17] Completed full working pngimage test program and added two test
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.
2014-02-05 11:39:59 -06:00