Merge in from trunk r64802 - r68625

[wxWidgets.git] / src / png / TODO

diff --git a/src/png/TODO b/src/png/TODO
index a5f639577dd6c4aceae5cb90e9c0beaa717e70fe..0af8d827a46f07de594fadb12c35339aa6f2fd87 100644 (file)
--- a/src/png/TODO
+++ b/src/png/TODO
@@ -1,3 +1,4 @@
+/*

 TODO - list of things to do for libpng:
 
 Final bug fixes.
 TODO - list of things to do for libpng:
 
 Final bug fixes.


@@ -8,7 +9,7 @@ Fix problem with C++ and EXTERN "C".
 cHRM transformation.
 Improve setjmp/longjmp usage or remove it in favor of returning error codes.
 Add "grayscale->palette" transformation and "palette->grayscale" detection.
 cHRM transformation.
 Improve setjmp/longjmp usage or remove it in favor of returning error codes.
 Add "grayscale->palette" transformation and "palette->grayscale" detection.

-Improved dithering.
+Improved quantizing and dithering.

 Multi-lingual error and warning message support.
 Complete sRGB transformation (presently it simply uses gamma=0.45455).
 Man pages for function calls.
 Multi-lingual error and warning message support.
 Complete sRGB transformation (presently it simply uses gamma=0.45455).
 Man pages for function calls.


@@ -17,8 +18,14 @@ Better filter selection
    (counting huffman bits/precompression?  filter inertia?  filter costs?).
 Histogram creation.
 Text conversion between different code pages (Latin-1 -> Mac and DOS).
    (counting huffman bits/precompression?  filter inertia?  filter costs?).
 Histogram creation.
 Text conversion between different code pages (Latin-1 -> Mac and DOS).

-Should we always malloc 2^bit_depth PLTE/tRNS/hIST entries for safety?

 Build gamma tables using fixed point (and do away with floating point entirely).
 Build gamma tables using fixed point (and do away with floating point entirely).

+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.
 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.
+Provide for conditional compilation of 16-bit support (except for the
+  initial stripping down to 8-bits when reading a 16-bit PNG datastream).
+Switch to the simpler zlib (zlib/libpng) license if legally possible.
+
+*/