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[libpng17] Ported recent changes from libpng16 to libpng17

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Fixed 'minimal' builds. Various obviously useful minimal configurations
  don't build because of missing contrib/libtests test programs and overly
  complex dependencies in scripts/pnglibconf.dfa. This change adds
  contrib/conftest/*.dfa files that can be used in automatic build
  scripts to ensure that these configurations continue to build.
Enabled WRITE_INVERT and WRITE_PACK in contrib/pngminim/encoder.
This commit is contained in:
John Bowler
2013-11-22 17:41:20 -06:00
committed by Glenn Randers-Pehrson
parent 81824079b5
commit 7e2707e2af
35 changed files with 738 additions and 271 deletions
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pngwio.c
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@@ -149,6 +149,8 @@ png_set_write_fn(png_structrp png_ptr, png_voidp io_ptr,
# else
png_ptr->output_flush_fn = output_flush_fn;
# endif
#else
PNG_UNUSED(output_flush_fn)
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
#ifdef PNG_READ_SUPPORTED