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Merge branch releases/1.8 revisions r6168 through r6170 into trunk.

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- Updates libpng to 1.6.37 (from 1.6.23) 
Note: Seems svn can't merge it automatic when a folder was removed and readded with same name. 
Easier to update libs by deleting all files - copying new ones over and then check svn stat for differences
and resolve them manually.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6171 dfc29bdd-3216-0410-991c-e03cc46cb475
This commit is contained in:
cutealien
2020-12-19 14:35:50 +00:00
parent 4d13cab50e
commit 7f76377bad
43 changed files with 5806 additions and 4846 deletions
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source/Irrlicht/libpng/TODO
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@ -1,29 +1,23 @@
/*
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.
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).
Make profile checking optional via a png_set_something() call.
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.
Switch to the simpler zlib (zlib/libpng) license if legally possible.
Extend pngvalid.c to validate more of the libpng transformations.
*/
* Fix all defects (duh!)
* Better C++ wrapper / full C++ implementation (?)
* Fix the problems with C++ and 'extern "C"'.
* cHRM transformation.
* Palette creation.
* "grayscale->palette" transformation and "palette->grayscale" detection.
* Improved dithering.
* Multi-lingual error and warning message support.
* Complete sRGB transformation. (Currently it simply uses gamma=0.45455.)
* Man pages for function calls.
* Better documentation.
* Better filter selection
(e.g., counting huffman bits/precompression; filter inertia; filter costs).
* Histogram creation.
* Text conversion between different code pages (e.g., Latin-1 -> Mac).
* Avoid building gamma tables whenever possible.
* Greater precision in changing to linear gamma for compositing against
background, and in doing rgb-to-gray transformations.
* Investigate pre-incremented loop counters and other loop constructions.
* Interpolated method of handling interlacing.
* More validations for libpng transformations.