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[libpng15] Delay calling png_init_filter_functions() until a row with nonzero

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filter is found.
This commit is contained in:
Glenn Randers-Pehrson 2013-08-20 21:23:50 -05:00
parent c5b84c0ba6
commit fe7b94da93
3 changed files with 14 additions and 44 deletions
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45
ANNOUNCE
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@ -1,5 +1,5 @@
Libpng 1.5.18beta01 - June 29, 2013
Libpng 1.5.18beta01 - August 21, 2013
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.
@ -24,46 +24,11 @@ Other information:
1.5.18beta01-README.txt
1.5.18beta01-LICENSE.txt
Changes since the last public release (1.5.16):
Changes since the last public release (1.5.17):
Version 1.5.17beta01 [June 8, 2013]
Removed a redundant test from png_set_IHDR().
Added set(CMAKE_CONFIGURATION_TYPES ...) to CMakeLists.txt (Andrew Hundt)
Deleted set(CMAKE_BUILD_TYPE) block from CMakeLists.txt
Make ARM NEON support work at compile time (not just configure time).
This moves the test on __ARM_NEON__ into pngconf.h to avoid issues when
using a compiler that compiles for multiple architectures at one time.
Removed PNG_FILTER_OPTIMIZATIONS and PNG_ARM_NEON_SUPPORTED from
pnglibconf.h, allowing more of the decisions to be made internally
(pngpriv.h) during the compile. Without this, symbol prefixing is broken
under certain circumstances on ARM platforms. Now only the API parts of
the optimizations ('check' vs 'api') are exposed in the public header files
except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the
decision about whether or not to use the optimizations.
Protect symbol prefixing against CC/CPPFLAGS/CFLAGS useage.
Previous iOS/Xcode fixes for the ARM NEON optimizations moved the test
on __ARM_NEON__ from configure time to compile time. This breaks symbol
prefixing because the definition of the special png_init_filter_functions
call was hidden at configure time if the relevant compiler arguments are
passed in CFLAGS as opposed to CC. This change attempts to avoid all
the confusion that would result by declaring the init function even when
it is not used, so that it will always get prefixed.
Version 1.5.17rc01 [June 29, 2013]
No changes.
Version 1.5.17rc02 [June 18, 2013]
Revised libpng.3 so that "doclifter" can process it.
Version 1.5.17rc03 [June 25, 2013]
Revised example.c to illustrate use of PNG_DEFAULT_sRGB and PNG_GAMMA_MAC_18
as parameters for png_set_gamma(). These have been available since
libpng-1.5.4.
Version 1.5.17 [June 27, 2013]
No changes.
Version 1.5.18beta01 [June 29, 2013]
Version 1.5.18beta01 [August 21, 2013]
Delay calling png_init_filter_functions() until a row with nonzero filter
is found.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

4
CHANGES
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@ -4150,7 +4150,9 @@ Version 1.5.17rc03 [June 25, 2013]
Version 1.5.17 [June 27, 2013]
No changes.
Version 1.5.18beta01 [June 29, 2013]
Version 1.5.18beta01 [August 21, 2013]
Delay calling png_init_filter_functions() until a row with nonzero filter
is found.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

9
pngrutil.c
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@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
* Last changed in libpng 1.5.16 [May 23, 2013]
* Last changed in libpng 1.5.18 [%RDATE%]
* Copyright (c) 1998-2013 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.)
@ -3700,10 +3700,13 @@ void /* PRIVATE */
png_read_filter_row(png_structp pp, png_row_infop row_info, png_bytep row,
png_const_bytep prev_row, int filter)
{
if (pp->read_filter[0] == NULL)
png_init_filter_functions(pp);
if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST)
{
if (pp->read_filter[0] == NULL)
png_init_filter_functions(pp);
pp->read_filter[filter-1](row_info, row, prev_row);
}
}
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED