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Imported from libpng-1.2.36beta03.tar

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Glenn Randers-Pehrson
2009-03-27 19:22:39 -05:00
parent 85f7d0a8d5
commit 3b8df1f143
54 changed files with 265 additions and 128 deletions
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libpng.3
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@@ -1,6 +1,6 @@
.TH LIBPNG 3 "March 21, 2009"
.TH LIBPNG 3 "March 28, 2009"
.SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.2.36beta02
libpng \- Portable Network Graphics (PNG) Reference Library 1.2.36beta03
.SH SYNOPSIS
\fI\fB
@@ -821,7 +821,7 @@ 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 1.2.36beta02 - March 21, 2009
libpng version 1.2.36beta03 - March 28, 2009
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -830,7 +830,7 @@ libpng.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.2.36beta02 - March 21, 2009
libpng versions 0.97, January 1998, through 1.2.36beta03 - March 28, 2009
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2008 Glenn Randers-Pehrson
@@ -962,9 +962,10 @@ so if it doesn't work, you don't have much to undo. Of course, you
will also want to insure that you are, in fact, dealing with a PNG
file. Libpng provides a simple check to see if a file is a PNG file.
To use it, pass in the first 1 to 8 bytes of the file to the function
png_sig_cmp(), and it will return 0 if the bytes match the corresponding
bytes of the PNG signature, or nonzero otherwise. Of course, the more bytes
you pass in, the greater the accuracy of the prediction.
png_sig_cmp(), and it will return 0 (false) if the bytes match the
corresponding bytes of the PNG signature, or nonzero (true) otherwise.
Of course, the more bytes you pass in, the greater the accuracy of the
prediction.
If you are intending to keep the file pointer open for use in libpng,
you must ensure you don't read more than 8 bytes from the beginning
@@ -3703,15 +3704,77 @@ application:
png_uint_32 application_vn = PNG_LIBPNG_VER;
.SH VIII. Y2K Compliance in libpng
.SH VIII. Changes to Libpng from version 1.0.x to 1.2.x
March 21, 2009
Support for user memory management was enabled by default. To
accomplish this, the functions png_create_read_struct_2(),
png_create_write_struct_2(), png_set_mem_fn(), png_get_mem_ptr(),
png_malloc_default(), and png_free_default() were added.
Support for certain MNG features was enabled.
Support for numbered error messages was added. However, we never got
around to actually numbering the error messages. The function
png_set_strip_error_numbers() was added (Note: the prototype for this
function was inadvertently removed from png.h in PNG_NO_ASSEMBLER_CODE
builds of libpng-1.2.15. It was restored in libpng-1.2.36).
The png_malloc_warn() function was added at libpng-1.2.3. This issues
a png_warning and returns NULL instead of aborting when it fails to
acquire the requested memory allocation.
Support for setting user limits on image width and height was enabled
by default. The functions png_set_user_limits(), png_get_user_width_max(),
and png_get_user_height_max() were added at libpng-1.2.6.
The png_set_add_alpha() function was added at libpng-1.2.7.
The function png_set_expand_gray_1_2_4_to_8() was added at libpng-1.2.9.
Unlike png_set_gray_1_2_4_to_8(), the new function does not expand the
tRNS chunk to alpha. The png_set_gray_1_2_4_to_8() function is
deprecated.
A number of macro definitions in support of runtime selection of
assembler code features (especially Intel MMX code support) were
added at libpng-1.2.0:
PNG_ASM_FLAG_MMX_SUPPORT_COMPILED
PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
PNG_ASM_FLAG_MMX_READ_INTERLACE
PNG_ASM_FLAG_MMX_READ_FILTER_SUB
PNG_ASM_FLAG_MMX_READ_FILTER_UP
PNG_ASM_FLAG_MMX_READ_FILTER_AVG
PNG_ASM_FLAG_MMX_READ_FILTER_PAETH
PNG_ASM_FLAGS_INITIALIZED
PNG_MMX_READ_FLAGS
PNG_MMX_FLAGS
PNG_MMX_WRITE_FLAGS
PNG_MMX_FLAGS
We added the following functions in support of runtime
selection of assembler code features:
png_get_mmx_flagmask()
png_set_mmx_thresholds()
png_get_asm_flags()
png_get_mmx_bitdepth_threshold()
png_get_mmx_rowbytes_threshold()
png_set_asm_flags()
We replaced all of these functions with simple stubs in libpng-1.2.20,
when the Intel assembler code was removed due to a licensing issue.
.SH IX. (Omitted)
.SH X. Y2K Compliance in libpng
March 28, 2009
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 1.2.36beta02 are Y2K compliant. It is my belief that earlier
upward through 1.2.36beta03 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
@@ -3973,7 +4036,7 @@ the first widely used release:
1.2.35rc01-02 13 10235 12.so.0.35[.0]
1.0.43 10 10043 10.so.0.43[.0]
1.2.35 13 10235 12.so.0.35[.0]
1.2.36beta01-02 13 10236 12.so.0.36[.0]
1.2.36beta01-03 13 10236 12.so.0.36[.0]
Henceforth the source version will match the shared-library minor
and patch numbers; the shared-library major version number will be
@@ -4029,7 +4092,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.2.36beta02 - March 21, 2009:
Libpng version 1.2.36beta03 - March 28, 2009:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@@ -4050,7 +4113,7 @@ included in the libpng distribution, the latter shall prevail.)
If you modify libpng you may insert additional notices immediately following
this sentence.
libpng versions 1.2.6, August 15, 2004, through 1.2.36beta02, March 21, 2009, are
libpng versions 1.2.6, August 15, 2004, through 1.2.36beta03, March 28, 2009, are
Copyright (c) 2004,2006-2008 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
@@ -4149,7 +4212,7 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
March 21, 2009
March 28, 2009
.\" end of man page