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/* TODO - list of things to do for libpng: Final bug fixes. Better C++ wrapper/full C++ implementation? Fix problem with C++ and EXTERN "C". cHRM transformation. Remove setjmp/longjmp usage in favor of returning error codes. As a start on this, minimize the use of png_error(), replacing them with png_warning(); return(0); or similar. Palette creation. Add "grayscale->palette" transformation and "palette->grayscale" detection. Improved dithering. Multi-lingual error and warning message support. Complete sRGB transformation (presently it simply uses gamma=0.45455). Man pages for function calls. Better documentation. Better filter selection (counting huffman bits/precompression? filter inertia? filter costs?). Histogram creation. Text conversion between different code pages (Latin-1 -> Mac and DOS). Avoid building gamma tables whenever possible. Use greater precision when changing to linear gamma for compositing against background and doing rgb-to-gray transformation. Investigate pre-incremented loop counters and other loop constructions. Add interpolated method of handling interlacing. Extend pngvalid.c to validate more of the libpng transformations. */