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non-pch build fix
[wxWidgets.git] / src / png / TODO
1 /*
2 TODO - list of things to do for libpng:
3
4 Final bug fixes.
5 Better C++ wrapper/full C++ implementation?
6 Fix problem with C++ and EXTERN "C".
7 cHRM transformation.
8 Remove setjmp/longjmp usage in favor of returning error codes.
9 Add "grayscale->palette" transformation and "palette->grayscale" detection.
10 Improved dithering.
11 Multi-lingual error and warning message support.
12 Complete sRGB transformation (presently it simply uses gamma=0.45455).
13 Man pages for function calls.
14 Better documentation.
15 Better filter selection
16 (counting huffman bits/precompression? filter inertia? filter costs?).
17 Histogram creation.
18 Text conversion between different code pages (Latin-1 -> Mac and DOS).
19 Avoid building gamma tables whenever possible.
20 Use greater precision when changing to linear gamma for compositing against
21 background and doing rgb-to-gray transformation.
22 Investigate pre-incremented loop counters and other loop constructions.
23 Add interpolated method of handling interlacing.
24 Switch to the simpler zlib (zlib/libpng) license if legally possible.
25 Extend pngvalid.c to validate more of the libpng transformations.
26
27 */