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

Imported from libpng-1.2.0rc1.tar

Browse Source
This commit is contained in:
Glenn Randers-Pehrson
2001-08-25 06:46:06 -05:00
parent 1ea0ff34fa
commit 1b8e567237
53 changed files with 316 additions and 211 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
libpng.3
View File

@@ -1,6 +1,6 @@
.TH LIBPNG 3 "August 8, 2001"
.TH LIBPNG 3 "August 25, 2001"
.SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.2.0beta5
libpng \- Portable Network Graphics (PNG) Reference Library 1.2.0rc1
.SH SYNOPSIS
\fI\fB
@@ -787,7 +787,7 @@ Following is a copy of the libpng.txt file that accompanies libpng.
.SH LIBPNG.TXT
libpng.txt - A description on how to use and modify libpng
libpng version 1.2.0beta5 - August 8, 2001
libpng version 1.2.0rc1 - August 25, 2001
Updated and distributed by Glenn Randers-Pehrson
<randeg@alum.rpi.edu>
Copyright (c) 1998-2001 Glenn Randers-Pehrson
@@ -1591,17 +1591,18 @@ changes the storage of the pixels to blue, green, red:
color_type == PNG_COLOR_TYPE_RGB_ALPHA)
png_set_bgr(png_ptr);
PNG files store RGB pixels packed into 3 bytes. This code expands them
into 4 bytes for windowing systems that need them in this format:
PNG files store RGB pixels packed into 3 or 6 bytes. This code expands them
into 4 or 8 bytes for windowing systems that need them in this format:
if (bit_depth == 8 && color_type ==
PNG_COLOR_TYPE_RGB) png_set_filler(png_ptr,
filler, PNG_FILLER_BEFORE);
if (color_type == PNG_COLOR_TYPE_RGB)
png_set_filler(png_ptr, filler, PNG_FILLER_BEFORE);
where "filler" is the 8 or 16-bit number to fill with, and the location is
either PNG_FILLER_BEFORE or PNG_FILLER_AFTER, depending upon whether
you want the filler before the RGB or after. This transformation
does not affect images that already have full alpha channels.
does not affect images that already have full alpha channels. To add an
opaque alpha channel, use filler=0xff or 0xffff and PNG_FILLER_AFTER which
will generate RGBA pixels.
If you are reading an image with an alpha channel, and you need the
data as ARGB instead of the normal PNG format RGBA:
@@ -3613,13 +3614,13 @@ application:
.SH IX. Y2K Compliance in libpng
August 8, 2001
August 25, 2001
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
This is your unofficial assurance that libpng from version 0.71 and
upward through 1.2.0beta5 are Y2K compliant. It is my belief that earlier
upward through 1.2.0rc1 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant.
Libpng only has three year fields. One is a 2-byte unsigned integer that
@@ -3794,7 +3795,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.2.0beta5 - August 8, 2001:
Libpng version 1.2.0rc1 - August 25, 2001:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (randeg@alum.rpi.edu).
@@ -3811,7 +3812,7 @@ included in the libpng distribution, the latter shall prevail.)
If you modify libpng you may insert additional notices immediately following
this sentence.
libpng versions 1.0.7, July 1, 2000, through 1.2.0beta5, August 8, 2001, are
libpng versions 1.0.7, July 1, 2000, through 1.2.0rc1, August 25, 2001, are
Copyright (c) 2000-2001 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.0.6
with the following individuals added to the list of Contributing Authors
@@ -3903,7 +3904,7 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
randeg@alum.rpi.edu
August 8, 2001
August 25, 2001
.\" end of man page