John Bowler 54feb0ad2a pngimage: correct #define checking
In libpng 1.7 pngimage needs to check PNG_WRITE_PNG_SUPPORTED (new in 1.7), not
PNG_WRITE_SUPPORTED because png_write_png can be disabled without disabling
PNG_WRITE_SUPPORTED.  Copied the approach from 1.6 pngcp.c (so this still works
in 1.6 as well.)
2016-07-02 08:03:09 -07:00
..

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".