[libpng16] Revised documentation of png_get_error_ptr() in the libpng manual.
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Glenn Randers-Pehrson
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5
ANNOUNCE
5
ANNOUNCE
@ -1,4 +1,4 @@
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Libpng 1.6.30beta01 - March 16, 2017
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Libpng 1.6.30beta01 - March 28, 2017
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This is not intended to be a public release. It will be replaced
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within a few weeks by a public version or by another test version.
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@ -25,9 +25,10 @@ Other information:
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Changes since the last public release (1.6.29):
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Version 1.6.30beta01 [March 16, 2017]
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Version 1.6.30beta01 [March 28, 2017]
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Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in
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makefile.linux and makefile.solaris-x86 (Cosmin).
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Revised documentation of png_get_error_ptr() in the libpng manual.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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6
CHANGES
6
CHANGES
@ -5811,15 +5811,17 @@ Version 1.6.29beta02 [February 22, 2017]
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Version 1.6.29beta03 [March 1, 2017]
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Avoid potential overflow of shift operations in png_do_expand() (Aaron Boxer).
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Change test ZLIB_VERNUM >= 0x1281 to ZLIB_VERNUM >= 0x1290 in pngrutil.c
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because Solaris 11 distributes zlib-1.2.8.f that is older than 1.2.8.1.
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because Solaris 11 distributes zlib-1.2.8.f that is older than 1.2.8.1,
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as suggested in zlib FAQ, item 24.
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Suppress clang warnings about implicit sign changes in png.c
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Version 1.6.29 [March 16, 2017]
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No changes.
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Version 1.6.30beta01 [March 16, 2017]
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Version 1.6.30beta01 [March 28, 2017]
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Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in
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makefile.linux and makefile.solaris-x86 (Cosmin).
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Revised documentation of png_get_error_ptr() in the libpng manual.
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Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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(subscription required; visit
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@ -1,6 +1,6 @@
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libpng-manual.txt - A description on how to use and modify libpng
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libpng version 1.6.30beta01 - March 16, 2017
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libpng version 1.6.30beta01 - March 28, 2017
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Updated and distributed by Glenn Randers-Pehrson
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<glennrp at users.sourceforge.net>
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Copyright (c) 1998-2016 Glenn Randers-Pehrson
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@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng
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Based on:
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libpng versions 0.97, January 1998, through 1.6.30beta01 - March 16, 2017
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libpng versions 0.97, January 1998, through 1.6.30beta01 - March 28, 2017
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Updated and distributed by Glenn Randers-Pehrson
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Copyright (c) 1998-2016 Glenn Randers-Pehrson
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@ -4246,8 +4246,6 @@ functions after png_create_*_struct() has been called by calling:
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png_voidp error_ptr, png_error_ptr error_fn,
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png_error_ptr warning_fn);
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png_voidp error_ptr = png_get_error_ptr(png_ptr);
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If NULL is supplied for either error_fn or warning_fn, then the libpng
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default function will be used, calling fprintf() and/or longjmp() if a
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problem is encountered. The replacement error functions should have
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@ -4259,6 +4257,11 @@ parameters as follows:
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void user_warning_fn(png_structp png_ptr,
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png_const_charp warning_msg);
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Then, within your error_fn, you can retrieve the error_ptr if
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you need it, by calling
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png_voidp error_ptr = png_get_error_ptr(png_ptr);
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The motivation behind using setjmp() and longjmp() is the C++ throw and
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catch exception handling methods. This makes the code much easier to write,
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as there is no need to check every return code of every function call.
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19
libpng.3
19
libpng.3
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.TH LIBPNG 3 "March 16, 2017"
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.TH LIBPNG 3 "March 28, 2017"
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.SH NAME
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libpng \- Portable Network Graphics (PNG) Reference Library 1.6.30beta01
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.SH SYNOPSIS
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@ -510,7 +510,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
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.SH LIBPNG.TXT
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libpng-manual.txt - A description on how to use and modify libpng
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libpng version 1.6.30beta01 - March 16, 2017
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libpng version 1.6.30beta01 - March 28, 2017
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Updated and distributed by Glenn Randers-Pehrson
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<glennrp at users.sourceforge.net>
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Copyright (c) 1998-2016 Glenn Randers-Pehrson
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@ -521,7 +521,7 @@ libpng-manual.txt - A description on how to use and modify libpng
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Based on:
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libpng versions 0.97, January 1998, through 1.6.30beta01 - March 16, 2017
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libpng versions 0.97, January 1998, through 1.6.30beta01 - March 28, 2017
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Updated and distributed by Glenn Randers-Pehrson
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Copyright (c) 1998-2016 Glenn Randers-Pehrson
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@ -4756,8 +4756,6 @@ functions after png_create_*_struct() has been called by calling:
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png_voidp error_ptr, png_error_ptr error_fn,
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png_error_ptr warning_fn);
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png_voidp error_ptr = png_get_error_ptr(png_ptr);
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If NULL is supplied for either error_fn or warning_fn, then the libpng
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default function will be used, calling fprintf() and/or longjmp() if a
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problem is encountered. The replacement error functions should have
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@ -4769,6 +4767,11 @@ parameters as follows:
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void user_warning_fn(png_structp png_ptr,
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png_const_charp warning_msg);
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Then, within your error_fn, you can retrieve the error_ptr if
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you need it, by calling
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png_voidp error_ptr = png_get_error_ptr(png_ptr);
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The motivation behind using setjmp() and longjmp() is the C++ throw and
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catch exception handling methods. This makes the code much easier to write,
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as there is no need to check every return code of every function call.
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@ -6023,7 +6026,7 @@ possible without all of you.
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Thanks to Frank J. T. Wojcik for helping with the documentation.
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Libpng version 1.6.30beta01 - March 16, 2017:
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Libpng version 1.6.30beta01 - March 28, 2017:
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Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
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Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
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@ -6048,7 +6051,7 @@ this sentence.
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This code is released under the libpng license.
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libpng versions 1.0.7, July 1, 2000 through 1.6.30beta01, March 16, 2017 are
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libpng versions 1.0.7, July 1, 2000 through 1.6.30beta01, March 28, 2017 are
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Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
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derived from libpng-1.0.6, and are distributed according to the same
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disclaimer and license as libpng-1.0.6 with the following individuals
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@ -6176,7 +6179,7 @@ files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
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Glenn Randers-Pehrson
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glennrp at users.sourceforge.net
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March 16, 2017
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March 28, 2017
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.\" end of man page
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