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[libpng17] Added png_get_palette_max() function.

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Glenn Randers-Pehrson
2013-02-04 19:55:53 -06:00
parent 9124f3e29a
commit d304125332
6 changed files with 40 additions and 25 deletions
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17
libpng-manual.txt
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@@ -1,6 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.7.0alpha10 - January 21, 2013
libpng version 1.7.0alpha10 - February 5, 2013
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2013 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.7.0alpha10 - January 21, 2013
libpng versions 0.97, January 1998, through 1.7.0alpha10 - February 5, 2013
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2011 Glenn Randers-Pehrson
@@ -676,9 +676,6 @@ where 0x7fffffffL means unlimited. You can retrieve this limit with
chunk_cache_max = png_get_chunk_cache_max(png_ptr);
This limit also applies to the number of buffers that can be allocated
by png_decompress_chunk() while decompressing iTXt, zTXt, and iCCP chunks.
You can also set a limit on the amount of memory that a compressed chunk
other than IDAT can occupy, with
@@ -4594,6 +4591,14 @@ If the error is ignored, or if png_benign_error() treats it as a warning,
any invalid pixels are decoded as opaque black by the decoder and written
as-is by the encoder.
Retrieving the maximum palette index found was added at libpng-1.5.15.
This statement must appear after png_read_png() or png_read_image().
int max_palette = png_get_palette_max(png_ptr, info_ptr);
This will return the maximum palette index found, or "-1" if the palette
was not checked, or "0" if no palette was found.
A. Changes that affect users of libpng
There are no substantial API changes between the non-deprecated parts of
@@ -5161,7 +5166,7 @@ Other rules can be inferred by inspecting the libpng source.
XVII. Y2K Compliance in libpng
January 21, 2013
February 5, 2013
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.