mewin/libpng
1
0
Fork 0
mirror of https://git.code.sf.net/p/libpng/code.git synced 2025-07-10 18:04:09 +02:00
Code Issues Projects Releases Wiki Activity

[libpng16] Imported from libpng-1.6.0beta21.tar

Browse Source
This commit is contained in:
Glenn Randers-Pehrson
2012-04-27 18:29:24 -05:00
parent bc2a57f657
commit 43309056ac
13 changed files with 47 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
libpng-manual.txt
View File

@@ -1,6 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.6.0beta21 - March 29, 2012
libpng version 1.6.0beta21 - April 27, 2012
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2011 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 1.6.0beta21 - March 29, 2012
libpng versions 0.97, January 1998, through 1.6.0beta21 - April 27, 2012
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2011 Glenn Randers-Pehrson
@@ -822,7 +822,7 @@ the screen_gamma value. Pixels with alpha less than 1.0
will still have linear components.
Use this format if you have control over your
compositing software and do don't do other arithmetic
compositing software and so don't do other arithmetic
(such as scaling) on the data you get from libpng. Your
compositing software can simply copy opaque pixels to
the output but still has linear values for the
@@ -1153,6 +1153,15 @@ data has been read, or zero if it is missing. The parameters to the
png_get_<chunk> are set directly if they are simple data types, or a
pointer into the info_ptr is returned for any complex types.
The colorspace data from gAMA, cHRM, sRGB, iCCP, and sBIT chunks
is simply returned to give the application information about how the
image was encoded. Libpng itself only does transformations using the file
gamma when combining semitransparent pixels with the background color, and,
since libpng-1.6.0, when converting between 8-bit sRGB and 16-bit linear pixels
within the simplified API. Libpng also uses the file gamma when converting
RGB to gray, beginning with libpng-1.0.5, if the application calls
png_set_rgb_to_gray()).
png_get_PLTE(png_ptr, info_ptr, &palette,
&num_palette);
@@ -5003,7 +5012,7 @@ Other rules can be inferred by inspecting the libpng source.
XVI. Y2K Compliance in libpng
March 29, 2012
April 27, 2012
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.