John Bowler 1775bdeb24 Better filter checking
Improve pngvalid coverage of filter combinations, remove the (new in 1.7) code
which disabled previous-row filters on the first row of an image in some cases.

Signed-off-by: John Bowler <jbowler@acm.org>
2015-11-24 22:24:18 -08:00
..
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This "contrib" directory contains contributions which are not necessarily under
the libpng license, although all are open source.  They are not part of
libpng proper and are not used for building the library, although some are used
for testing the library via "make check".