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[devel] Added a section in documentation

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about using png_set_io_ptr() in configure scripts for detecting libpng
This commit is contained in:
Glenn Randers-Pehrson
2009-06-02 13:46:41 -05:00
parent e0c505cfae
commit 37e7e0bd81
3 changed files with 23 additions and 9 deletions
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6
ANNOUNCE
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@@ -1,5 +1,5 @@
Libpng 1.4.0beta62 - May 31, 2009 Libpng 1.4.0beta62 - June 2, 2009
This is not intended to be a public release. It will be replaced This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version. within a few weeks by a public version or by another test version.
@@ -466,10 +466,12 @@ version 1.4.0beta61 [May 20, 2009]
accordingly. accordingly.
More reformatting of comments, mostly to capitalize sentences. More reformatting of comments, mostly to capitalize sentences.
version 1.4.0beta62 [May 31, 2009] version 1.4.0beta62 [June 2, 2009]
Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h
and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h
Reformatted several remaining "else statement" into two lines. Reformatted several remaining "else statement" into two lines.
Added a section about using png_get_io_ptr() in configure scripts to detect
the presence of libpng.
version 1.4.0betaN [future] version 1.4.0betaN [future]
Build shared libraries with -lz and sometimes -lm. Build shared libraries with -lz and sometimes -lm.

4
CHANGES
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@@ -2143,10 +2143,12 @@ version 1.4.0beta61 [May 20, 2009]
accordingly. accordingly.
More reformatting of comments, mostly to capitalize sentences. More reformatting of comments, mostly to capitalize sentences.
version 1.4.0beta62 [May 31, 2009] version 1.4.0beta62 [June 2, 2009]
Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h
and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h
Reformatted several remaining "else statement" into two lines. Reformatted several remaining "else statement" into two lines.
Added a section about using png_get_io_ptr() in configure scripts to detect
the presence of libpng.
version 1.4.0betaN [future] version 1.4.0betaN [future]
Build shared libraries with -lz and sometimes -lm. Build shared libraries with -lz and sometimes -lm.

22
libpng-1.4.0beta62.txt
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@@ -1,6 +1,6 @@
libpng.txt - A description on how to use and modify libpng libpng.txt - A description on how to use and modify libpng
libpng version 1.4.0beta62 - May 31, 2009 libpng version 1.4.0beta62 - June 2, 2009
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net> <glennrp at users.sourceforge.net>
Copyright (c) 1998-2009 Glenn Randers-Pehrson Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -9,7 +9,7 @@ libpng.txt - A description on how to use and modify libpng
Based on: Based on:
libpng versions 0.97, January 1998, through 1.4.0beta62 - May 31, 2009 libpng versions 0.97, January 1998, through 1.4.0beta62 - June 2, 2009
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2009 Glenn Randers-Pehrson Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -1839,6 +1839,9 @@ other png_set_*() functions, which might require access to some of
the IHDR settings. The remaining png_set_*() functions can be called the IHDR settings. The remaining png_set_*() functions can be called
in any order. in any order.
If you wish, you can reset the compression_type, interlace_type,
or filter_method later.
png_set_PLTE(png_ptr, info_ptr, palette, png_set_PLTE(png_ptr, info_ptr, palette,
num_palette); num_palette);
palette - the palette for the file palette - the palette for the file
@@ -3044,7 +3047,14 @@ The png_calloc() function was added.
We removed the trailing '.' from the warning and error messages. We removed the trailing '.' from the warning and error messages.
X. Source code repository X. Detecting libpng
The png_get_io_ptr() function has been present since libpng-0.88, has never
changed, and is unaffected by conditional compilation macros. It is the
best choice for use in configure scripts for detecting the presence of any
libpng version since 0.88.
XI. Source code repository
Since about February 2009, version 1.2.34, libpng has been under "git" source Since about February 2009, version 1.2.34, libpng has been under "git" source
control. The git repository was built from old libpng-x.y.z.tar.gz files control. The git repository was built from old libpng-x.y.z.tar.gz files
@@ -3063,7 +3073,7 @@ the libpng bug tracker at
http://libpng.sourceforge.net http://libpng.sourceforge.net
XI. Coding style XII. Coding style
Our coding style is similar to the "Allman" style, with curly Our coding style is similar to the "Allman" style, with curly
braces on separate lines: braces on separate lines:
@@ -3149,9 +3159,9 @@ left parenthesis that follows it:
Other rules can be inferred by inspecting the libpng Other rules can be inferred by inspecting the libpng
source. source.
XII. Y2K Compliance in libpng XIII. Y2K Compliance in libpng
May 31, 2009 June 2, 2009
Since the PNG Development group is an ad-hoc body, we can't make Since the PNG Development group is an ad-hoc body, we can't make
an official declaration. an official declaration.