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cde9b583a8
Implemented better defaulting of zlib settings based on image properties. Implemented pass-through of png_write_rows when the rows can be used directly (a common case) optimizing the handling of previous-row buffering. Removed the METHODICAL filter selection method and disabled the HEURISTIC one; the first was ridiculously slow (though useful for experiments) the second doesn't work. Filter selection is temporarily disabled (it defaults to the lowest numbered filter in the list; typically 'none'). New handling of compression settings (incomplete), new PNG compression level (not yet visible in an API). Back ported 'PNG_FAST_FILTERS' from 1.6 (in png.h). There are minimal API changes beyond removal of the selection options. Work is still to be done to investigate a filter selection mechanism that is at least as good as the previous one. Signed-off-by: John Bowler <jbowler@acm.org>
This directory (contrib/examples) contains examples of libpng usage.
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ORIGINAL AUTHORS
The following people have contributed to the code in this directory. None
of the people below claim any rights with regard to the contents of this
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John Bowler <jbowler@acm.org>