Imported from libpng-1.2.0rc1.tar
diff --git a/libpng.3 b/libpng.3
index 579b46b..2db3e25 100644
--- a/libpng.3
+++ b/libpng.3
@@ -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 @@
.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 @@
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 @@
.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 @@
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 @@
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 @@
Glenn Randers-Pehrson
randeg@alum.rpi.edu
-August 8, 2001
+August 25, 2001
.\" end of man page