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[master] Store user's user_png_ver in new png_ptr->user_png_ver element.

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Revised iTXt support. To ensure binary compatibility with
previous versions, the "lang" and "lang_key" members will be assumed
to be omitted from versions prior to 1.2.41beta11 whenever there is a
library mismatch.
This commit is contained in:
Glenn Randers-Pehrson 2009-11-01 21:22:01 -06:00
parent d6dc43db7d
commit af9a41d770
4 changed files with 44 additions and 16 deletions
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9
ANNOUNCE
View File

@ -1,5 +1,5 @@
Libpng 1.2.41beta11 - November 1, 2009
Libpng 1.2.41beta11 - November 2, 2009
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.
@ -99,11 +99,12 @@ version 1.2.41beta10 [November 1, 2009]
longer necessary to gain iTXt support), as a signal that the user has
been building previous versions with PNG_iTXt_SUPPORTED as well.
version 1.2.41beta11 [November 1, 2009]
version 1.2.41beta11 [November 2, 2009]
Store user's user_png_ver in new png_ptr->user_png_ver element.
Revised iTXt support. To ensure binary compatibility with
previous versions, the "lang" and "lang_key" members will be assumed
to be omitted from previous versions whenever there is a library
mismatch.
to be omitted from versions prior to 1.2.41beta11 whenever there is a
library mismatch.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net

9
CHANGES
View File

@ -2466,7 +2466,7 @@ version 1.2.40beta01 [August 20, 2009]
version 1.2.40rc01 [September 2, 2009]
Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)
version 1.2.40 and 1.0.49 [November 1, 2009]
version 1.2.40 and 1.0.49 [November 2, 2009]
No changes.
version 1.0.50 [September 10, 2009]
@ -2529,11 +2529,12 @@ version 1.2.41beta10 [November 1, 2009]
longer necessary to gain iTXt support), as a signal that the user has
been building previous versions with PNG_iTXt_SUPPORTED as well.
version 1.2.41beta11 [November 1, 2009]
version 1.2.41beta11 [November 2, 2009]
Store user's user_png_ver in new png_ptr->user_png_ver element.
Revised iTXt support. To ensure binary compatibility with
previous versions, the "lang" and "lang_key" members will be assumed
to be omitted from previous versions whenever there is a library
mismatch.
to be omitted from versions prior to 1.2.41beta11 whenever there is a
library mismatch.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

6
png.c
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@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions
*
* Last changed in libpng 1.2.41 [November 1, 2009]
* Last changed in libpng 1.2.41 [November 2, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -722,13 +722,13 @@ png_get_copyright(png_structp png_ptr)
#else
#ifdef __STDC__
return ((png_charp) PNG_STRING_NEWLINE \
"libpng version x 1.2.41beta11 - November 1, 2009" PNG_STRING_NEWLINE \
"libpng version 1.2.41beta11 - November 2, 2009" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2009 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE);
#else
return ((png_charp) "libpng version 1.2.41beta11 - November 1, 2009\
return ((png_charp) "libpng version 1.2.41beta11 - November 2, 2009\
Copyright (c) 1998-2009 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");

36
pngset.c
View File

@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
* Last changed in libpng 1.2.41 [November 1, 2009]
* Last changed in libpng 1.2.41 [November 2, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -653,7 +653,9 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
int num_text)
{
int i;
#ifdef PNG_iTXt_SUPPORTED
int caller_no_itxt = 0;
#endif
png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
png_ptr->chunk_name[0] == '\0') ?
@ -662,6 +664,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
return(0);
#ifdef PNG_iTXt_SUPPORTED
/* If an earlier version of the library was used to build the
* application, it might be using a png_textp structure that
* does not contain the lang or lang_key elements. Even if you build
@ -670,12 +673,35 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
* defined, the complete png_textp structure probably has not existed
* all along and it's not safe to access them, due to a bug in
* pngconf.h from version 1.2.9 to 1.2.40.
*
* To do: accept mismatched libraries when both are version 1.2.41
* or later.
*/
if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
caller_no_itxt = 1;
{
int j;
png_byte c[12];
j = 0;
for (j = 0; j < 12; j++)
c[j] = 0;
for (j = 0; c[j] && j < 12; j++)
c[j] = png_ptr->user_png_ver[j];
if ((c[5] == '\0') /* 1.2.N */ ||
(c[5] == 'b') /* 1.2.NbetaNN */ ||
(c[5] == 'r') /* 1.2.NrcNN */ ||
(c[4] == '1') /* 1.2.1x */ ||
(c[4] == '2') /* 1.2.2x */ ||
(c[4] == '3') /* 1.2.3x */ ||
((c[4] == '4') /* 1.2.4x */ &&
(((c[5] == '0')) /* 1.2.40 */ ||
((c[5] == '1') /* 1.2.41x */ &&
(((c[6] == 'b') /* 1.2.41betax */ &&
((c[10] == '0'))) /* 1.2.41beta0x */ ||
((c[10] == '1') /* 1.2.41beta1x */ &&
(c[11] == '0'))))))) /* 1.2.41beta10 */
caller_no_itxt = 1;
}
#endif /* PNG_iTXt_SUPPORTED */
/* Make sure we have enough space in the "text" array in info_struct
* to hold all of the incoming text_ptr objects.