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[libpng17] Ported recent changes from libpng16 to libpng17

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Fixed 'minimal' builds. Various obviously useful minimal configurations
  don't build because of missing contrib/libtests test programs and overly
  complex dependencies in scripts/pnglibconf.dfa. This change adds
  contrib/conftest/*.dfa files that can be used in automatic build
  scripts to ensure that these configurations continue to build.
Enabled WRITE_INVERT and WRITE_PACK in contrib/pngminim/encoder.
This commit is contained in:
John Bowler 2013-11-22 17:41:20 -06:00 committed by Glenn Randers-Pehrson
parent 81824079b5
commit 7e2707e2af
35 changed files with 738 additions and 271 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
ANNOUNCE
View File

@ -1,5 +1,5 @@
Libpng 1.7.0beta23 - November 18, 2013
Libpng 1.7.0beta23 - November 22, 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.
@ -418,13 +418,19 @@ Version 1.7.0beta22 [November 7, 2013]
Fixed #include in filter_neon_intrinsics.c and ctype macros. The ctype char
checking macros take an unsigned char argument, not a signed char.
Version 1.7.0beta23 [November 18, 2013]
Version 1.7.0beta23 [November 22, 2013]
Changed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpread.c to
#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED to be consistent with
what is in pngpriv.h.
Moved prototype for png_handle_unknown() in pngpriv.h outside of
the #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED/#endif block.
Added "-Wall" to CFLAGS in contrib/pngminim/*/makefile
Fixed 'minimal' builds. Various obviously useful minimal configurations
don't build because of missing contrib/libtests test programs and overly
complex dependencies in scripts/pnglibconf.dfa. This change adds
contrib/conftest/*.dfa files that can be used in automatic build
scripts to ensure that these configurations continue to build.
Enabled WRITE_INVERT and WRITE_PACK in contrib/pngminim/encoder.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

8
CHANGES
View File

@ -4707,13 +4707,19 @@ Version 1.7.0beta22 [November 7, 2013]
Fixed #include in filter_neon_intrinsics.c and ctype macros. The ctype char
checking macros take an unsigned char argument, not a signed char.
Version 1.7.0beta23 [November 18, 2013]
Version 1.7.0beta23 [November 22, 2013]
Changed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpread.c to
#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED to be consistent with
what is in pngpriv.h.
Moved prototype for png_handle_unknown() in pngpriv.h outside of
the #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED/#endif block.
Added "-Wall" to CFLAGS in contrib/pngminim/*/makefile
Fixed 'minimal' builds. Various obviously useful minimal configurations
don't build because of missing contrib/libtests test programs and overly
complex dependencies in scripts/pnglibconf.dfa. This change adds
contrib/conftest/*.dfa files that can be used in automatic build
scripts to ensure that these configurations continue to build.
Enabled WRITE_INVERT and WRITE_PACK in contrib/pngminim/encoder.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

4
LICENSE
View File

@ -10,7 +10,7 @@ this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.7.0beta23, November 7, 2013, are
libpng versions 1.2.6, August 15, 2004, through 1.7.0beta23, November 22, 2013, are
Copyright (c) 2004, 2006-2013 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
@ -108,4 +108,4 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
November 7, 2013
November 22, 2013

2
README
View File

@ -1,4 +1,4 @@
README for libpng version 1.7.0beta23 - November 7, 2013 (shared library 17.0)
README for libpng version 1.7.0beta23 - November 22, 2013 (shared library 17.0)
See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng.

5
arm/filter_neon.S
View File

@ -3,7 +3,7 @@
*
* Copyright (c) 2013 Glenn Randers-Pehrson
* Written by Mans Rullgard, 2011.
* Last changed in libpng 1.6.7 [(PENDING RELEASE)]
* Last changed in libpng 1.6.8 [(PENDING RELEASE)]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -11,7 +11,8 @@
*/
/* This is required to get the symbol renames, which are #defines, and also
* includes the definition (or not) of PNG_ARM_NEON_OPT.
* includes the definition (or not) of PNG_ARM_NEON_OPT and
* PNG_ARM_NEON_IMPLEMENTATION.
*/
#define PNG_VERSION_INFO_ONLY
#include "../pngpriv.h"

4
arm/filter_neon_intrinsics.c
View File

@ -5,7 +5,7 @@
* Written by James Yu <james.yu at linaro.org>, October 2013.
* Based on filter_neon.S, written by Mans Rullgard, 2011.
*
* Last changed in libpng 1.6.7 [(PENDING RELEASE)]
* Last changed in libpng 1.6.8 [(PENDING RELEASE)]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -15,7 +15,7 @@
#include "../pngpriv.h"
/* This code requires -mfpu=neon on the command line: */
#if PNG_ARM_NEON_IMPLEMENTATION == 1 /* intrinsics code */
#if PNG_ARM_NEON_IMPLEMENTATION == 1 /* intrinsics code from pngpriv.h */
#include <arm_neon.h>

46
contrib/conftest/README Normal file
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@ -0,0 +1,46 @@
This directory contains test configuration files, currently always '.dfa' files
intended to be used in the build by setting the make macro DFA_XTRA to the name
of the file.
These files are used in release validation of the 'configure' builds of libpng
by building 'make check', or 'make all-am' for cross-builds, with each .dfa
file.
The files in this directory may change between minor releases, however
contributions describing specific builds of libpng are welcomed. There is no
guarantee that libpng will continue to build with such configurations; support
for given configurations can be, and has been, dropped between successive minor
releases. However if a .dfa file describing a configuration is not in this
directory it is very unlikely that it will be tested before a minor release!
You can use these .dfa files as the basis of new configurations. Files in this
directory should not have any use restrictions or restrictive licenses.
DOCUMENTATION
=============
Examples:
${srcdir}/pngusr.dfa
${srcdir}/contrib/pngminim/*/pngusr.dfa
Documentation of the options:
${srcdir}/scripts/pnglibconf.dfa
Documentation of the file format:
${srcdir}/scripts/options.awk
FILE NAMING
===========
File names in this directory may NOT contain any of the five characters:
- , + * ?
Neither may they contain any space character.
While other characters may be used it is strongly suggested that file names be
limited to lower case Latiin alphabetic characters (a-z), digits (0-9) and, if
necessary the underscore (_) character. File names should be about 8 characters
long (excluding the .dfa extension). Submitted .dfa files should have names
between 7 and 16 characters long, shorter names (6 characters or less) are
reserved for standard tests.

58
contrib/conftest/read.dfa Normal file
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@ -0,0 +1,58 @@
# read.dfa
# Build time configuration of libpng
#
# Author: John Bowler
# Copyright: (c) John Bowler, 2013
# Usage rights:
# To the extent possible under law, the author has waived all copyright and
# related or neighboring rights to this work. This work is published from:
# United States.
#
# Build libpng with basic read support. This enables the lowest level libpng
# read API - the one where the calling code has to use a loop to read each row.
# At present this is the API used by most programs.
#
# Support is enabled only for those chunks and transformations that are
# typically required - others can be added easily.
#
everything = off
# The sequential read code is enabled here; the progressive code can be used
# instead but there is no point enabling both.
option SEQUENTIAL_READ on
# Likewise it is pointless enabling both fixed and floating point APIs. Choose
# one or the other for both the API and the internal math.
#Fixed point:
#option FIXED_POINT on
#option FLOATING_ARITHMETIC off
#Floating point:
option FLOATING_POINT on
option FLOATING_ARITHMETIC on
# Basic error handling, IO and user memory support. The latter allows the
# application program to provide its own implementations of 'malloc' and 'free'.
option SETJMP on
option STDIO on
option USER_MEM on
# To read the full set of PNG images correctly interlace, transparency and
# 16-bit support is required. The application can implement interlace itself,
# but very few do and it's no longer possible to disable it when READ is
# enabled.
option READ_tRNS on
option READ_16BIT on
# Everything else is application dependent. This file assumes the app handles
# all the native PNG bit layouts, so it doesn't need any of layout change
# transforms, but needs libpng to perform gamma correction. It doesn't do any
# colorspace stuff and ignores the 'significant bit' information.
#
# If your app always expands the image to a limited set of bit layouts you
# probably want to consider using the simplified API instead of the low level
# one - see png.h and s_read.dfa.
option READ_GAMMA on

35
contrib/conftest/s_read.dfa Normal file
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@ -0,0 +1,35 @@
# s_read.dfa
# Build time configuration of libpng
#
# Author: John Bowler
# Copyright: (c) John Bowler, 2013
# Usage rights:
# To the extent possible under law, the author has waived all copyright and
# related or neighboring rights to this work. This work is published from:
# United States.
#
# Build libpng with simplified read support (only). This builds a minimal
# libpng able to read all PNG formats and convert them into a small number of
# well understood memory formats.
#
everything = off
option SIMPLIFIED_READ on
# It isn't necessary to chose fixed or floating point for the APIs because the
# simplified API doesn't need fixed or floating point numbers. It is necessary
# to chose an internal math implementation. The default (because of 'everything
# = off') is fixed point - turn the floating point implementation on if you have
# hardware floating point or prefer your software floating point implementation.
option FLOATING_ARITHMETIC on
# This is not strictly necessary, but without it the message strings in the API
# will not be filled in
option ERROR_TEXT on
# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't
# need this if you don't use them, they just allow the in-memory layout to be
# changed to match common hardware formats.
option SIMPLIFIED_READ_AFIRST on
option SIMPLIFIED_READ_BGR on

33
contrib/conftest/s_write.dfa Normal file
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@ -0,0 +1,33 @@
# s_write.dfa
# Build time configuration of libpng
#
# Author: John Bowler
# Copyright: (c) John Bowler, 2013
# Usage rights:
# To the extent possible under law, the author has waived all copyright and
# related or neighboring rights to this work. This work is published from:
# United States.
#
# Build libpng with (just) simplified write support
#
everything = off
option SIMPLIFIED_WRITE on
# It isn't necessary to chose fixed or floating point for the APIs because the
# simplified API doesn't need fixed or floating point numbers. It is necessary
# to chose an internal math implementation. The default (because of 'everything
# = off') is fixed point - turn the floating point implementation on if you have
# hardware floating point or prefer your software floating point implementation.
option FLOATING_ARITHMETIC on
# This is not strictly necessary, but without it the message strings in the API
# will not be filled in
option ERROR_TEXT on
# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't
# need this if you don't use them, they just allow the in-memory layout to be
# changed to match common hardware formats.
option SIMPLIFIED_WRITE_AFIRST on
option SIMPLIFIED_WRITE_BGR on

36
contrib/conftest/simple.dfa Normal file
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@ -0,0 +1,36 @@
# simple.dfa
# Build time configuration of libpng
#
# Author: John Bowler
# Copyright: (c) John Bowler, 2013
# Usage rights:
# To the extent possible under law, the author has waived all copyright and
# related or neighboring rights to this work. This work is published from:
# United States.
#
# Build libpng with just the simplified APIs (read and write).
#
everything = off
option SIMPLIFIED_WRITE on
option SIMPLIFIED_READ on
# It isn't necessary to chose fixed or floating point for the APIs because the
# simplified API doesn't need fixed or floating point numbers. It is necessary
# to chose an internal math implementation. The default (because of 'everything
# = off') is fixed point - turn the floating point implementation on if you have
# hardware floating point or prefer your software floating point implementation.
option FLOATING_ARITHMETIC on
# This is not strictly necessary, but without it the message strings in the API
# will not be filled in
option ERROR_TEXT on
# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't
# need this if you don't use them, they just allow the in-memory layout to be
# changed to match common hardware formats.
option SIMPLIFIED_READ_AFIRST on
option SIMPLIFIED_READ_BGR on
option SIMPLIFIED_WRITE_AFIRST on
option SIMPLIFIED_WRITE_BGR on

45
contrib/conftest/write.dfa Normal file
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@ -0,0 +1,45 @@
# write.dfa
# Build time configuration of libpng
#
# Author: John Bowler
# Copyright: (c) John Bowler, 2013
# Usage rights:
# To the extent possible under law, the author has waived all copyright and
# related or neighboring rights to this work. This work is published from:
# United States.
#
# Build libpng with no read support and minimal write support.
#
everything = off
# Switch on the write code - this makes a minimalist encoder
option WRITE on
# Choose fixed or floating point APIs and arithmetic. The choices are
# independent but normally they will match. It is typically better to use the
# floating point if you have floating point hardware. If you don't know, or
# (perhaps) to make libpng smaller used fixed point throughout.
#Fixed point:
#option FIXED_POINT on
#option FLOATING_ARITHMETIC off
#Floating point:
option FLOATING_POINT on
option FLOATING_ARITHMETIC on
# Basic error handling, IO and user memory support. The latter allows the
# application program to provide its own implementations of 'malloc' and 'free'.
option SETJMP on
option STDIO on
option USER_MEM on
# Everything else is optional. Unlike the read code in libpng the write code
# does not need to deal with arbitrary formats, so only add support for things
# you really do write! For example you might only write sRGB images, sometimes
# with transparency and never write 16 bit images, so:
option WRITE_sRGB on
option WRITE_tRNS on
#option WRITE_16BIT off (this is the default with 'everything = off')

191
contrib/libtests/pngstest.c
View File

@ -517,14 +517,23 @@ static void format_default(format_list *pf, int redundant)
for (f=0; f<FORMAT_COUNT; ++f)
{
/* Eliminate redundant settings. */
/* BGR is meaningless if no color: */
if ((f & PNG_FORMAT_FLAG_COLOR) == 0 && (f & PNG_FORMAT_FLAG_BGR) != 0)
/* Eliminate redundant and unsupported settings. */
# ifdef PNG_FORMAT_BGR_SUPPORTED
/* BGR is meaningless if no color: */
if ((f & PNG_FORMAT_FLAG_COLOR) == 0 &&
(f & PNG_FORMAT_FLAG_BGR) != 0)
# else
if ((f & 0x10U/*HACK: fixed value*/) != 0)
# endif
continue;
/* AFIRST is meaningless if no alpha: */
if ((f & PNG_FORMAT_FLAG_ALPHA) == 0 &&
(f & PNG_FORMAT_FLAG_AFIRST) != 0)
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
if ((f & PNG_FORMAT_FLAG_ALPHA) == 0 &&
(f & PNG_FORMAT_FLAG_AFIRST) != 0)
# else
if ((f & 0x20U/*HACK: fixed value*/) != 0)
# endif
continue;
format_set(pf, f);
@ -786,6 +795,7 @@ gp_ga8(Pixel *p, png_const_voidp pb)
p->a = pp[1];
}
#ifdef PNG_FORMAT_AFIRST_SUPPORTED
static void
gp_ag8(Pixel *p, png_const_voidp pb)
{
@ -794,6 +804,7 @@ gp_ag8(Pixel *p, png_const_voidp pb)
p->r = p->g = p->b = pp[1];
p->a = pp[0];
}
#endif
static void
gp_rgb8(Pixel *p, png_const_voidp pb)
@ -806,6 +817,7 @@ gp_rgb8(Pixel *p, png_const_voidp pb)
p->a = 255;
}
#ifdef PNG_FORMAT_BGR_SUPPORTED
static void
gp_bgr8(Pixel *p, png_const_voidp pb)
{
@ -816,6 +828,7 @@ gp_bgr8(Pixel *p, png_const_voidp pb)
p->b = pp[0];
p->a = 255;
}
#endif
static void
gp_rgba8(Pixel *p, png_const_voidp pb)
@ -828,6 +841,7 @@ gp_rgba8(Pixel *p, png_const_voidp pb)
p->a = pp[3];
}
#ifdef PNG_FORMAT_BGR_SUPPORTED
static void
gp_bgra8(Pixel *p, png_const_voidp pb)
{
@ -838,7 +852,9 @@ gp_bgra8(Pixel *p, png_const_voidp pb)
p->b = pp[0];
p->a = pp[3];
}
#endif
#ifdef PNG_FORMAT_AFIRST_SUPPORTED
static void
gp_argb8(Pixel *p, png_const_voidp pb)
{
@ -849,7 +865,9 @@ gp_argb8(Pixel *p, png_const_voidp pb)
p->b = pp[3];
p->a = pp[0];
}
#endif
#if defined(PNG_FORMAT_AFIRST_SUPPORTED) && defined(PNG_FORMAT_BGR_SUPPORTED)
static void
gp_abgr8(Pixel *p, png_const_voidp pb)
{
@ -860,6 +878,7 @@ gp_abgr8(Pixel *p, png_const_voidp pb)
p->b = pp[1];
p->a = pp[0];
}
#endif
static void
gp_g16(Pixel *p, png_const_voidp pb)
@ -879,6 +898,7 @@ gp_ga16(Pixel *p, png_const_voidp pb)
p->a = pp[1];
}
#ifdef PNG_FORMAT_AFIRST_SUPPORTED
static void
gp_ag16(Pixel *p, png_const_voidp pb)
{
@ -887,6 +907,7 @@ gp_ag16(Pixel *p, png_const_voidp pb)
p->r = p->g = p->b = pp[1];
p->a = pp[0];
}
#endif
static void
gp_rgb16(Pixel *p, png_const_voidp pb)
@ -899,6 +920,7 @@ gp_rgb16(Pixel *p, png_const_voidp pb)
p->a = 65535;
}
#ifdef PNG_FORMAT_BGR_SUPPORTED
static void
gp_bgr16(Pixel *p, png_const_voidp pb)
{
@ -909,6 +931,7 @@ gp_bgr16(Pixel *p, png_const_voidp pb)
p->b = pp[0];
p->a = 65535;
}
#endif
static void
gp_rgba16(Pixel *p, png_const_voidp pb)
@ -921,6 +944,7 @@ gp_rgba16(Pixel *p, png_const_voidp pb)
p->a = pp[3];
}
#ifdef PNG_FORMAT_BGR_SUPPORTED
static void
gp_bgra16(Pixel *p, png_const_voidp pb)
{
@ -931,7 +955,9 @@ gp_bgra16(Pixel *p, png_const_voidp pb)
p->b = pp[0];
p->a = pp[3];
}
#endif
#ifdef PNG_FORMAT_AFIRST_SUPPORTED
static void
gp_argb16(Pixel *p, png_const_voidp pb)
{
@ -942,7 +968,9 @@ gp_argb16(Pixel *p, png_const_voidp pb)
p->b = pp[3];
p->a = pp[0];
}
#endif
#if defined(PNG_FORMAT_AFIRST_SUPPORTED) && defined(PNG_FORMAT_BGR_SUPPORTED)
static void
gp_abgr16(Pixel *p, png_const_voidp pb)
{
@ -953,6 +981,7 @@ gp_abgr16(Pixel *p, png_const_voidp pb)
p->b = pp[1];
p->a = pp[0];
}
#endif
/* Given a format, return the correct one of the above functions. */
static void (*
@ -966,29 +995,35 @@ get_pixel(png_uint_32 format))(Pixel *p, png_const_voidp pb)
{
if (format & PNG_FORMAT_FLAG_COLOR)
{
if (format & PNG_FORMAT_FLAG_BGR)
{
if (format & PNG_FORMAT_FLAG_ALPHA)
# ifdef PNG_FORMAT_BGR_SUPPORTED
if (format & PNG_FORMAT_FLAG_BGR)
{
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_abgr16;
if (format & PNG_FORMAT_FLAG_ALPHA)
{
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_abgr16;
else
# endif
return gp_bgra16;
}
else
return gp_bgra16;
return gp_bgr16;
}
else
return gp_bgr16;
}
else
# endif
{
if (format & PNG_FORMAT_FLAG_ALPHA)
{
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_argb16;
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_argb16;
else
else
# endif
return gp_rgba16;
}
@ -1001,10 +1036,12 @@ get_pixel(png_uint_32 format))(Pixel *p, png_const_voidp pb)
{
if (format & PNG_FORMAT_FLAG_ALPHA)
{
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_ag16;
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_ag16;
else
else
# endif
return gp_ga16;
}
@ -1017,29 +1054,35 @@ get_pixel(png_uint_32 format))(Pixel *p, png_const_voidp pb)
{
if (format & PNG_FORMAT_FLAG_COLOR)
{
if (format & PNG_FORMAT_FLAG_BGR)
{
if (format & PNG_FORMAT_FLAG_ALPHA)
# ifdef PNG_FORMAT_BGR_SUPPORTED
if (format & PNG_FORMAT_FLAG_BGR)
{
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_abgr8;
if (format & PNG_FORMAT_FLAG_ALPHA)
{
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_abgr8;
else
# endif
return gp_bgra8;
}
else
return gp_bgra8;
return gp_bgr8;
}
else
return gp_bgr8;
}
else
# endif
{
if (format & PNG_FORMAT_FLAG_ALPHA)
{
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_argb8;
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_argb8;
else
else
# endif
return gp_rgba8;
}
@ -1052,10 +1095,12 @@ get_pixel(png_uint_32 format))(Pixel *p, png_const_voidp pb)
{
if (format & PNG_FORMAT_FLAG_ALPHA)
{
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_ag8;
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
if (format & PNG_FORMAT_FLAG_AFIRST)
return gp_ag8;
else
else
# endif
return gp_ga8;
}
@ -2618,13 +2663,15 @@ component_loc(png_byte loc[4], png_uint_32 format)
loc[2] = 1;
if (format & PNG_FORMAT_FLAG_BGR)
{
loc[1] = 2;
loc[3] = 0;
}
# ifdef PNG_FORMAT_BGR_SUPPORTED
if (format & PNG_FORMAT_FLAG_BGR)
{
loc[1] = 2;
loc[3] = 0;
}
else
else
# endif
{
loc[1] = 0;
loc[3] = 2;
@ -2639,15 +2686,17 @@ component_loc(png_byte loc[4], png_uint_32 format)
if (format & PNG_FORMAT_FLAG_ALPHA)
{
if (format & PNG_FORMAT_FLAG_AFIRST)
{
loc[0] = 0;
++loc[1];
++loc[2];
++loc[3];
}
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
if (format & PNG_FORMAT_FLAG_AFIRST)
{
loc[0] = 0;
++loc[1];
++loc[2];
++loc[3];
}
else
else
# endif
loc[0] = channels;
++channels;
@ -3017,17 +3066,25 @@ read_file(Image *image, png_uint_32 format, png_const_colorp background)
return logerror(image, "memory init: ", image->file_name, "");
}
else if (image->input_file != NULL)
{
if (!png_image_begin_read_from_stdio(&image->image, image->input_file))
return logerror(image, "stdio init: ", image->file_name, "");
}
# ifdef PNG_STDIO_SUPPORTED
else if (image->input_file != NULL)
{
if (!png_image_begin_read_from_stdio(&image->image, image->input_file))
return logerror(image, "stdio init: ", image->file_name, "");
}
else
{
if (!png_image_begin_read_from_file(&image->image, image->file_name))
return logerror(image, "file init: ", image->file_name, "");
}
else
{
if (!png_image_begin_read_from_file(&image->image, image->file_name))
return logerror(image, "file init: ", image->file_name, "");
}
# else
else
{
return logerror(image, "unsupported file/stdio init: ",
image->file_name, "");
}
# endif
/* This must be set after the begin_read call: */
if (image->opts & sRGB_16BIT)
@ -3466,11 +3523,19 @@ main(int argc, char **argv)
memset(gpc_error_via_linear, 0, sizeof gpc_error_via_linear);
}
else if (strcmp(arg, "--file") == 0)
opts |= READ_FILE;
# ifdef PNG_STDIO_SUPPORTED
opts |= READ_FILE;
# else
return 77; /* skipped: no support */
# endif
else if (strcmp(arg, "--memory") == 0)
opts &= ~READ_FILE;
else if (strcmp(arg, "--stdio") == 0)
opts |= USE_STDIO;
# ifdef PNG_STDIO_SUPPORTED
opts |= USE_STDIO;
# else
return 77; /* skipped: no support */
# endif
else if (strcmp(arg, "--name") == 0)
opts &= ~USE_STDIO;
else if (strcmp(arg, "--verbose") == 0)

106
contrib/libtests/pngvalid.c
View File

@ -45,7 +45,10 @@
# include PNG_ZLIB_HEADER
#endif
#ifdef PNG_WRITE_SUPPORTED /* else pngvalid can do nothing */
/* pngvalid requires write support and one of the fixed or floating point APIs.
*/
#if defined(PNG_WRITE_SUPPORTED) &&\
(defined(PNG_FIXED_POINT_SUPPORTED) || defined(PNG_FLOATING_POINT_SUPPORTED))
#if PNG_LIBPNG_VER < 10500
/* This deliberately lacks the PNG_CONST. */
@ -106,6 +109,11 @@ typedef png_byte *png_const_bytep;
# endif
#endif
/* Fixups for various minimal builds */
#ifndef PNG_ERROR_TEXT_SUPPORTED
# define png_error(a,b) png_err(a)
#endif
/***************************** EXCEPTION HANDLING *****************************/
#ifdef PNG_FREESTANDING_TESTS
# include <cexcept.h>
@ -1268,6 +1276,7 @@ store_current_palette(png_store *ps, int *npalette)
#endif /* PNG_READ_SUPPORTED */
/***************************** MEMORY MANAGEMENT*** ***************************/
#ifdef PNG_USER_MEM_SUPPORTED
/* A store_memory is simply the header for an allocated block of memory. The
* pointer returned to libpng is just after the end of the header block, the
* allocated memory is followed by a second copy of the 'mark'.
@ -1468,6 +1477,7 @@ store_free(png_structp ppIn, png_voidp memory)
this->next = NULL;
store_memory_free(pp, pool, this);
}
#endif /* PNG_USER_MEM_SUPPORTED */
/* Setup functions. */
/* Cleanup when aborting a write or after storing the new file. */
@ -1493,7 +1503,9 @@ store_write_reset(png_store *ps)
/* And make sure that all the memory has been freed - this will output
* spurious errors in the case of memory corruption above, but this is safe.
*/
store_pool_delete(ps, &ps->write_memory_pool);
# ifdef PNG_USER_MEM_SUPPORTED
store_pool_delete(ps, &ps->write_memory_pool);
# endif
store_freenew(ps);
}
@ -1517,16 +1529,20 @@ set_store_for_write(png_store *ps, png_infopp ppi,
store_write_reset(ps);
safecat(ps->wname, sizeof ps->wname, 0, name);
/* Don't do the slow memory checks if doing a speed test. */
if (ps->speed)
/* Don't do the slow memory checks if doing a speed test, also if user
* memory is not supported we can't do it anyway.
*/
# ifdef PNG_USER_MEM_SUPPORTED
if (!ps->speed)
ps->pwrite = png_create_write_struct_2(PNG_LIBPNG_VER_STRING,
ps, store_error, store_warning, &ps->write_memory_pool,
store_malloc, store_free);
else
# endif
ps->pwrite = png_create_write_struct(PNG_LIBPNG_VER_STRING,
ps, store_error, store_warning);
else
ps->pwrite = png_create_write_struct_2(PNG_LIBPNG_VER_STRING,
ps, store_error, store_warning, &ps->write_memory_pool,
store_malloc, store_free);
png_set_write_fn(ps->pwrite, ps, store_write, store_flush);
# ifdef PNG_SET_OPTION_SUPPORTED
@ -1574,8 +1590,10 @@ store_read_reset(png_store *ps)
}
# endif
/* Always do this to be safe. */
store_pool_delete(ps, &ps->read_memory_pool);
# ifdef PNG_USER_MEM_SUPPORTED
/* Always do this to be safe. */
store_pool_delete(ps, &ps->read_memory_pool);
# endif
ps->current = NULL;
ps->next = NULL;
@ -1635,14 +1653,16 @@ set_store_for_read(png_store *ps, png_infopp ppi, png_uint_32 id,
* However, given that store_error works correctly in these circumstances
* we don't ever expect NULL in this program.
*/
if (ps->speed)
ps->pread = png_create_read_struct(PNG_LIBPNG_VER_STRING, ps,
store_error, store_warning);
# ifdef PNG_USER_MEM_SUPPORTED
if (!ps->speed)
ps->pread = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, ps,
store_error, store_warning, &ps->read_memory_pool, store_malloc,
store_free);
else
ps->pread = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, ps,
store_error, store_warning, &ps->read_memory_pool, store_malloc,
store_free);
else
# endif
ps->pread = png_create_read_struct(PNG_LIBPNG_VER_STRING, ps, store_error,
store_warning);
if (ps->pread == NULL)
{
@ -1944,9 +1964,11 @@ typedef struct png_modifier
} png_modifier;
/* This returns true if the test should be stopped now because it has already
* failed and it is running silently.
* failed and it is running silently. It is not static simply to avoid having
* to special case it on all the #ifdefs on which it depends.
*/
static int fail(png_modifier *pm)
extern int fail(png_modifier *pm);
/*static*/ int fail(png_modifier *pm)
{
return !pm->log && !pm->this.verbose && (pm->this.nerrors > 0 ||
(pm->this.treat_warnings_as_errors && pm->this.nwarnings > 0));
@ -3127,8 +3149,10 @@ init_standard_palette(png_store *ps, png_structp pp, png_infop pi, int npalette,
for (; i<256; ++i)
tRNS[i] = 24;
if (j > 0)
png_set_tRNS(pp, pi, tRNS, j, 0/*color*/);
# ifdef PNG_WRITE_tRNS_SUPPORTED
if (j > 0)
png_set_tRNS(pp, pi, tRNS, j, 0/*color*/);
# endif
}
}
@ -3374,6 +3398,13 @@ transform_row(png_const_structp pp, png_byte buffer[TRANSFORM_ROWMAX],
*/
#define DEPTH(bd) ((png_byte)(1U << (bd)))
/* This is just a helper for compiling on minimal systems with no write
* interlacing support.
*/
#ifndef PNG_WRITE_INTERLACING_SUPPORTED
# define png_set_interlace_handling(a) (1)
#endif
/* Make a standardized image given a an image colour type, bit depth and
* interlace type. The standard images have a very restricted range of
* rows and heights and are used for testing transforms rather than image
@ -3527,8 +3558,12 @@ make_transform_images(png_store *ps)
{
int interlace_type;
for (interlace_type = PNG_INTERLACE_NONE;
interlace_type < PNG_INTERLACE_LAST; ++interlace_type)
# ifdef PNG_WRITE_INTERLACING_SUPPORTED
for (interlace_type = PNG_INTERLACE_NONE;
interlace_type < PNG_INTERLACE_LAST; ++interlace_type)
# else
interlace_type = PNG_INTERLACE_NONE;
# endif
{
char name[FILE_NAME_SIZE];
@ -3684,7 +3719,9 @@ make_size_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type,
int npasses = npasses_from_interlace_type(pp, interlace_type);
png_uint_32 y;
int pass;
int nfilter = PNG_FILTER_VALUE_LAST;
# ifdef PNG_WRITE_FILTER_SUPPORTED
int nfilter = PNG_FILTER_VALUE_LAST;
# endif
png_byte image[16][SIZE_ROWMAX];
/* To help consistent error detection make the parts of this buffer
@ -3738,6 +3775,7 @@ make_size_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type,
continue;
}
# ifdef PNG_WRITE_FILTER_SUPPORTED
/* Only get to here if the row has some pixels in it, set the
* filters to 'all' for the very first row and thereafter to a
* single filter. It isn't well documented, but png_set_filter
@ -3753,6 +3791,7 @@ make_size_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type,
if (nfilter-- == 0)
nfilter = PNG_FILTER_VALUE_LAST-1;
# endif
png_write_row(pp, row);
}
@ -3820,8 +3859,10 @@ make_size(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type, int bdlo,
width, height, 0);
make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_NONE,
width, height, 1);
# ifdef PNG_WRITE_INTERLACING_SUPPORTED
make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_ADAM7,
width, height, 0);
# endif
make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_ADAM7,
width, height, 1);
}
@ -4016,8 +4057,12 @@ make_errors(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type,
{
int interlace_type;
for (interlace_type = PNG_INTERLACE_NONE;
interlace_type < PNG_INTERLACE_LAST; ++interlace_type)
# ifdef PNG_WRITE_INTERLACING_SUPPORTED
for (interlace_type = PNG_INTERLACE_NONE;
interlace_type < PNG_INTERLACE_LAST; ++interlace_type)
# else
interlace_type = PNG_INTERLACE_NONE;
# endif
{
unsigned int test;
char name[FILE_NAME_SIZE];
@ -4038,7 +4083,7 @@ make_errors(png_modifier* PNG_CONST pm, png_byte PNG_CONST colour_type,
return 1; /* keep going */
}
#endif
#endif /* PNG_WARNINGS_SUPPORTED */
static void
perform_error_test(png_modifier *pm)
@ -10436,10 +10481,11 @@ int main(int argc, char **argv)
return 0;
}
#else /* write not supported */
#else /* write or low level APIs not supported */
int main(void)
{
fprintf(stderr, "pngvalid: no write support in libpng, all tests skipped\n");
fprintf(stderr,
"pngvalid: no low level write support in libpng, all tests skipped\n");
/* So the test is skipped: */
return 77;
}

4
contrib/pngminim/encoder/pngusr.dfa
View File

@ -14,6 +14,10 @@ everything = off
option WRITE on
# These 2 options are required if you need to read PBM (P1 or P4) files.
option WRITE_INVERT on
option WRITE_PACK on
# You must choose fixed or floating point arithmetic:
# option FLOATING_POINT on

13
contrib/tools/pngfix.c
View File

@ -50,7 +50,7 @@
# error "pngfix will not work with libpng prior to 1.6.3"
#endif
#ifdef PNG_READ_SUPPORTED
#if defined(PNG_READ_SUPPORTED) && defined(PNG_EASY_ACCESS_SUPPORTED)
/* zlib.h defines the structure z_stream, an instance of which is included
* in this structure and is required for decompressing the LZ compressed
* data in PNG files.
@ -142,6 +142,11 @@
/* Is it safe to copy? */
#define SAFE_TO_COPY(chunk) (((chunk) & PNG_U32(0,0,0,32)) != 0)
/* Fix ups for builds with limited read support */
#ifndef PNG_ERROR_TEXT_SUPPORTED
# define png_error(a,b) png_err(a)
#endif
/********************************* UTILITIES **********************************/
/* UNREACHED is a value to cause an assert to fail. Because of the way the
* assert macro is written the string "UNREACHED" is produced in the error
@ -3644,7 +3649,7 @@ read_png(struct control *control)
return rc;
}
static void
static int
one_file(struct global *global, const char *file_name, const char *out_name)
{
int rc;
@ -3663,6 +3668,8 @@ one_file(struct global *global, const char *file_name, const char *out_name)
rc = read_png(&control);
rc |= control_end(&control);
return rc;
}
static void
@ -4031,4 +4038,4 @@ main(void)
fprintf(stderr, "pngfix does not work without read support\n");
return 77;
}
#endif /* PNG_READ_SUPPORTED */
#endif /* PNG_READ_SUPPORTED && PNG_EASY_ACCESS_SUPPORTED */

6
libpng-manual.txt
View File

@ -1,6 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.7.0beta23 - November 7, 2013
libpng version 1.7.0beta23 - November 22, 2013
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2013 Glenn Randers-Pehrson
@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.7.0beta23 - November 7, 2013
libpng versions 0.97, January 1998, through 1.7.0beta23 - November 22, 2013
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2013 Glenn Randers-Pehrson
@ -5250,7 +5250,7 @@ Other rules can be inferred by inspecting the libpng source.
XVII. Y2K Compliance in libpng
November 7, 2013
November 22, 2013
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.

14
libpng.3
View File

@ -1,4 +1,4 @@
.TH LIBPNG 3 "November 7, 2013"
.TH LIBPNG 3 "November 22, 2013"
.SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta23
.SH SYNOPSIS
@ -494,7 +494,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
.SH LIBPNG.TXT
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.7.0beta23 - November 7, 2013
libpng version 1.7.0beta23 - November 22, 2013
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2013 Glenn Randers-Pehrson
@ -505,7 +505,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.7.0beta23 - November 7, 2013
libpng versions 0.97, January 1998, through 1.7.0beta23 - November 22, 2013
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2013 Glenn Randers-Pehrson
@ -5745,7 +5745,7 @@ Other rules can be inferred by inspecting the libpng source.
.SH XVII. Y2K Compliance in libpng
November 7, 2013
November 22, 2013
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
@ -6015,7 +6015,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.7.0beta23 - November 7, 2013:
Libpng version 1.7.0beta23 - November 22, 2013:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@ -6038,7 +6038,7 @@ this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.7.0beta23, November 7, 2013, are
libpng versions 1.2.6, August 15, 2004, through 1.7.0beta23, November 22, 2013, are
Copyright (c) 2004,2006-2007 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
@ -6137,7 +6137,7 @@ certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
November 7, 2013
November 22, 2013
.\" end of man page

2
libpngpf.3
View File

@ -1,4 +1,4 @@
.TH LIBPNGPF 3 "November 7, 2013"
.TH LIBPNGPF 3 "November 22, 2013"
.SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta23
(private functions)

2
png.5
View File

@ -1,4 +1,4 @@
.TH PNG 5 "November 7, 2013"
.TH PNG 5 "November 22, 2013"
.SH NAME
png \- Portable Network Graphics (PNG) format
.SH DESCRIPTION

14
png.c
View File

@ -258,6 +258,10 @@ png_create_png_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
*/
# ifdef PNG_USER_MEM_SUPPORTED
png_set_mem_fn(&create_struct, mem_ptr, malloc_fn, free_fn);
# else
PNG_UNUSED(mem_ptr)
PNG_UNUSED(malloc_fn)
PNG_UNUSED(free_fn)
# endif
/* (*error_fn) can return control to the caller after the error_ptr is set,
@ -691,13 +695,13 @@ png_get_copyright(png_const_structrp png_ptr)
#else
# ifdef __STDC__
return PNG_STRING_NEWLINE \
"libpng version 1.7.0beta23 - November 7, 2013" PNG_STRING_NEWLINE \
"libpng version 1.7.0beta23 - November 22, 2013" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2013 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 "libpng version 1.7.0beta23 - November 7, 2013\
return "libpng version 1.7.0beta23 - November 22, 2013\
Copyright (c) 1998-2013 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@ -3008,10 +3012,14 @@ png_fixed(png_const_structrp png_ptr, double fp, png_const_charp text)
/* Overflow */
png_fixed_error(png_ptr, text);
# ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(text)
# endif
}
#endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || \
#if defined(PNG_GAMMA_SUPPORTED) || defined(PNG_COLORSPACE_SUPPORTED) ||\
defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
/* muldiv functions */
/* This API takes signed arguments and rounds the result to the nearest

10
png.h
View File

@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library
*
* libpng version 1.7.0beta23 - November 7, 2013
* libpng version 1.7.0beta23 - November 22, 2013
* 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.)
@ -11,7 +11,7 @@
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.7.0beta23 - November 7, 2013: Glenn
* libpng versions 0.97, January 1998, through 1.7.0beta23 - November 22, 2013: Glenn
* See also "Contributing Authors", below.
*
* Note about libpng version numbers:
@ -200,7 +200,7 @@
*
* This code is released under the libpng license.
*
* libpng versions 1.2.6, August 15, 2004, through 1.7.0beta23, November 7, 2013, are
* libpng versions 1.2.6, August 15, 2004, through 1.7.0beta23, November 22, 2013, are
* Copyright (c) 2004, 2006-2013 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:
@ -312,7 +312,7 @@
* Y2K compliance in libpng:
* =========================
*
* November 7, 2013
* November 22, 2013
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
@ -380,7 +380,7 @@
/* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.7.0beta23"
#define PNG_HEADER_VERSION_STRING \
" libpng version 1.7.0beta23 - November 7, 2013\n"
" libpng version 1.7.0beta23 - November 22, 2013\n"
#define PNG_LIBPNG_VER_SONUM 17
#define PNG_LIBPNG_VER_DLLNUM 17

2
pngconf.h
View File

@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng
*
* libpng version 1.7.0beta23 - November 7, 2013
* libpng version 1.7.0beta23 - November 22, 2013
*
* Copyright (c) 1998-2013 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

23
pngerror.c
View File

@ -382,6 +382,10 @@ png_benign_error(png_const_structrp png_ptr, png_const_charp error_message)
# endif
png_error(png_ptr, error_message);
}
# ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(error_message)
# endif
}
void /* PRIVATE */
@ -391,6 +395,10 @@ png_app_warning(png_const_structrp png_ptr, png_const_charp error_message)
png_warning(png_ptr, error_message);
else
png_error(png_ptr, error_message);
# ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(error_message)
# endif
}
void /* PRIVATE */
@ -400,6 +408,10 @@ png_app_error(png_const_structrp png_ptr, png_const_charp error_message)
png_warning(png_ptr, error_message);
else
png_error(png_ptr, error_message);
# ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(error_message)
# endif
}
#endif /* BENIGN_ERRORS */
@ -416,7 +428,8 @@ static PNG_CONST char png_digit[16] = {
};
#define PNG_MAX_ERROR_TEXT 196 /* Currently limited be profile_error in png.c */
#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED)
#if defined(PNG_WARNINGS_SUPPORTED) || \
(defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED))
static void /* PRIVATE */
png_format_buffer(png_const_structrp png_ptr, png_charp buffer, png_const_charp
error_message)
@ -506,6 +519,10 @@ png_chunk_benign_error(png_const_structrp png_ptr, png_const_charp
else
png_chunk_error(png_ptr, error_message);
# ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(error_message)
# endif
}
#endif
#endif /* PNG_READ_SUPPORTED */
@ -513,6 +530,10 @@ png_chunk_benign_error(png_const_structrp png_ptr, png_const_charp
void /* PRIVATE */
png_chunk_report(png_const_structrp png_ptr, png_const_charp message, int error)
{
# ifndef PNG_WARNINGS_SUPPORTED
PNG_UNUSED(message)
# endif
/* This is always supported, but for just read or just write it
* unconditionally does the right thing.
*/

6
pngmem.c
View File

@ -73,9 +73,10 @@ png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size),
* to implement a user memory handler. This checks to be sure it isn't
* called with big numbers.
*/
#ifdef PNG_USER_MEM_SUPPORTED
#ifndef PNG_USER_MEM_SUPPORTED
PNG_UNUSED(png_ptr)
#endif
if (size > 0 && size <= PNG_SIZE_MAX
# ifdef PNG_MAX_MALLOC_64K
&& size <= 65536U
@ -95,6 +96,8 @@ png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size),
return NULL;
}
#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) ||\
defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED)
/* This is really here only to work round a spurious warning in GCC 4.6 and 4.7
* that arises because of the checks in png_realloc_array that are repeated in
* png_malloc_array.
@ -165,6 +168,7 @@ png_realloc_array,(png_structrp png_ptr, png_const_voidp old_array,
return NULL; /* error */
}
#endif /* TEXT || sPLT || STORE_UNKNOWN_CHUNKS */
/* Various functions that have different error handling are derived from this.
* png_malloc always exists, but if PNG_USER_MEM_SUPPORTED is defined a separate

14
pngpriv.h
View File

@ -149,9 +149,15 @@
* typically the target FPU. If the FPU has been set to NEON (-mfpu=neon
* with GCC) then the compiler will define __ARM_NEON__ and we can rely
* unconditionally on NEON instructions not crashing, otherwise we must
* disable use of NEON instructions:
* disable use of NEON instructions.
*
* NOTE: at present these optimizations depend on 'ALIGNED_MEMORY', so they
* can only be turned on automatically if that is supported too. If
* PNG_ARM_NEON_OPT is set in CPPFLAGS (to >0) then arm/arm_init.c will fail
* to compile with an appropriate #error if ALIGNED_MEMORY has been turned
* off.
*/
# ifdef __ARM_NEON__
# if defined(__ARM_NEON__) && defined(PNG_ALIGNED_MEMORY_SUPPORTED)
# define PNG_ARM_NEON_OPT 2
# else
# define PNG_ARM_NEON_OPT 0
@ -1130,7 +1136,7 @@ PNG_INTERNAL_FUNCTION(void,png_read_finish_IDAT,(png_structrp png_ptr),
PNG_INTERNAL_FUNCTION(void,png_read_finish_row,(png_structrp png_ptr),
PNG_EMPTY);
/* Finish a row while reading, dealing with interlacing passes, etc. */
#endif
#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
/* Initialize the row buffers, etc. */
PNG_INTERNAL_FUNCTION(void,png_read_start_row,(png_structrp png_ptr),PNG_EMPTY);
@ -1810,7 +1816,7 @@ PNG_INTERNAL_FUNCTION(int,png_check_fp_string,(png_const_charp string,
png_size_t size),PNG_EMPTY);
#endif /* pCAL || sCAL */
#if defined(PNG_READ_GAMMA_SUPPORTED) ||\
#if defined(PNG_GAMMA_SUPPORTED) ||\
defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
/* Added at libpng version 1.5.0 */
/* This is a utility to provide a*times/div (rounded) and indicate

201
pngread.c
View File

@ -1125,12 +1125,11 @@ png_read_png(png_structrp png_ptr, png_inforp info_ptr,
/* Arguments to png_image_finish_read: */
/* Encoding of PNG data (used by the color-map code) */
/* TODO: change these, dang, ANSI-C reserves the 'E' namespace. */
# define E_NOTSET 0 /* File encoding not yet known */
# define E_sRGB 1 /* 8-bit encoded to sRGB gamma */
# define E_LINEAR 2 /* 16-bit linear: not encoded, NOT pre-multiplied! */
# define E_FILE 3 /* 8-bit encoded to file gamma, not sRGB or linear */
# define E_LINEAR8 4 /* 8-bit linear: only from a file value */
# define P_NOTSET 0 /* File encoding not yet known */
# define P_sRGB 1 /* 8-bit encoded to sRGB gamma */
# define P_LINEAR 2 /* 16-bit linear: not encoded, NOT pre-multiplied! */
# define P_FILE 3 /* 8-bit encoded to file gamma, not sRGB or linear */
# define P_LINEAR8 4 /* 8-bit linear: only from a file value */
/* Color-map processing: after libpng has run on the PNG image further
* processing may be needed to conver the data to color-map indicies.
@ -1161,7 +1160,7 @@ typedef struct
png_voidp first_row;
ptrdiff_t row_bytes; /* step between rows */
int file_encoding; /* E_ values above */
png_fixed_point gamma_to_linear; /* For E_FILE, reciprocal of gamma */
png_fixed_point gamma_to_linear; /* For P_FILE, reciprocal of gamma */
int colormap_processing; /* PNG_CMAP_ values above */
} png_image_read_control;
@ -1293,7 +1292,7 @@ png_image_read_header(png_voidp argument)
#ifdef PNG_COLORSPACE_SUPPORTED
/* Does the colorspace match sRGB? If there is no color endpoint
* (colorant) information assume yes, otherwise require the
* 'ENDPOINTS_MATCHE_sRGB' colorspace flag to have been set. If the
* 'ENDPOINTS_MATCHP_sRGB' colorspace flag to have been set. If the
* colorspace has been determined to be invalid ignore it.
*/
if ((format & PNG_FORMAT_FLAG_COLOR) != 0 && ((png_ptr->colorspace.flags
@ -1482,17 +1481,24 @@ png_image_skip_unused_chunks(png_structrp png_ptr)
*
* Or image data handling:
*
* tRNS, bKGD, gAMA, cHRM, sRGB, iCCP and sBIT.
* tRNS, bKGD, gAMA, cHRM, sRGB, [iCCP] and sBIT.
*
* This provides a small performance improvement and eliminates any
* potential vulnerability to security problems in the unused chunks.
*
* At present the iCCP chunk data isn't used, so iCCP chunk can be ignored
* too. This allows the simplified API to be compiled without iCCP support,
* however if the support is there the chunk is still checked to detect
* errors (which are unfortunately quite common.)
*/
{
static PNG_CONST png_byte chunks_to_process[] = {
98, 75, 71, 68, '\0', /* bKGD */
99, 72, 82, 77, '\0', /* cHRM */
103, 65, 77, 65, '\0', /* gAMA */
# ifdef PNG_READ_iCCP_SUPPORTED
105, 67, 67, 80, '\0', /* iCCP */
# endif
115, 66, 73, 84, '\0', /* sBIT */
115, 82, 71, 66, '\0', /* sRGB */
};
@ -1529,25 +1535,25 @@ set_file_encoding(png_image_read_control *display)
{
if (png_gamma_not_sRGB(g))
{
display->file_encoding = E_FILE;
display->file_encoding = P_FILE;
display->gamma_to_linear = png_reciprocal(g);
}
else
display->file_encoding = E_sRGB;
display->file_encoding = P_sRGB;
}
else
display->file_encoding = E_LINEAR8;
display->file_encoding = P_LINEAR8;
}
static unsigned int
decode_gamma(png_image_read_control *display, png_uint_32 value, int encoding)
{
if (encoding == E_FILE) /* double check */
if (encoding == P_FILE) /* double check */
encoding = display->file_encoding;
if (encoding == E_NOTSET) /* must be the file encoding */
if (encoding == P_NOTSET) /* must be the file encoding */
{
set_file_encoding(display);
encoding = display->file_encoding;
@ -1555,18 +1561,18 @@ decode_gamma(png_image_read_control *display, png_uint_32 value, int encoding)
switch (encoding)
{
case E_FILE:
case P_FILE:
value = png_gamma_16bit_correct(value*257, display->gamma_to_linear);
break;
case E_sRGB:
case P_sRGB:
value = png_sRGB_table[value];
break;
case E_LINEAR:
case P_LINEAR:
break;
case E_LINEAR8:
case P_LINEAR8:
value *= 257;
break;
@ -1585,9 +1591,9 @@ png_colormap_compose(png_image_read_control *display,
png_uint_32 background, int encoding)
{
/* The file value is composed on the background, the background has the given
* encoding and so does the result, the file is encoded with E_FILE and the
* encoding and so does the result, the file is encoded with P_FILE and the
* file and alpha are 8-bit values. The (output) encoding will always be
* E_LINEAR or E_sRGB.
* P_LINEAR or P_sRGB.
*/
png_uint_32 f = decode_gamma(display, foreground, foreground_encoding);
png_uint_32 b = decode_gamma(display, background, encoding);
@ -1597,7 +1603,7 @@ png_colormap_compose(png_image_read_control *display,
*/
f = f * alpha + b * (255-alpha);
if (encoding == E_LINEAR)
if (encoding == P_LINEAR)
{
/* Scale to 65535; divide by 255, approximately (in fact this is extremely
* accurate, it divides by 255.00000005937181414556, with no overflow.)
@ -1607,13 +1613,13 @@ png_colormap_compose(png_image_read_control *display,
f = (f+32768) >> 16;
}
else /* E_sRGB */
else /* P_sRGB */
f = PNG_sRGB_FROM_LINEAR(f);
return f;
}
/* NOTE: E_LINEAR values to this routine must be 16-bit, but E_FILE values must
/* NOTE: P_LINEAR values to this routine must be 16-bit, but P_FILE values must
* be 8-bit.
*/
static void
@ -1623,7 +1629,7 @@ png_create_colormap_entry(png_image_read_control *display,
{
png_imagep image = display->image;
const int output_encoding = (image->format & PNG_FORMAT_FLAG_LINEAR) ?
E_LINEAR : E_sRGB;
P_LINEAR : P_sRGB;
const int convert_to_Y = (image->format & PNG_FORMAT_FLAG_COLOR) == 0 &&
(red != green || green != blue);
@ -1633,18 +1639,18 @@ png_create_colormap_entry(png_image_read_control *display,
/* Update the cache with whether the file gamma is significantly different
* from sRGB.
*/
if (encoding == E_FILE)
if (encoding == P_FILE)
{
if (display->file_encoding == E_NOTSET)
if (display->file_encoding == P_NOTSET)
set_file_encoding(display);
/* Note that the cached value may be E_FILE too, but if it is then the
/* Note that the cached value may be P_FILE too, but if it is then the
* gamma_to_linear member has been set.
*/
encoding = display->file_encoding;
}
if (encoding == E_FILE)
if (encoding == P_FILE)
{
png_fixed_point g = display->gamma_to_linear;
@ -1652,10 +1658,10 @@ png_create_colormap_entry(png_image_read_control *display,
green = png_gamma_16bit_correct(green*257, g);
blue = png_gamma_16bit_correct(blue*257, g);
if (convert_to_Y || output_encoding == E_LINEAR)
if (convert_to_Y || output_encoding == P_LINEAR)
{
alpha *= 257;
encoding = E_LINEAR;
encoding = P_LINEAR;
}
else
@ -1663,11 +1669,11 @@ png_create_colormap_entry(png_image_read_control *display,
red = PNG_sRGB_FROM_LINEAR(red * 255);
green = PNG_sRGB_FROM_LINEAR(green * 255);
blue = PNG_sRGB_FROM_LINEAR(blue * 255);
encoding = E_sRGB;
encoding = P_sRGB;
}
}
else if (encoding == E_LINEAR8)
else if (encoding == P_LINEAR8)
{
/* This encoding occurs quite frequently in test cases because PngSuite
* includes a gAMA 1.0 chunk with most images.
@ -1676,10 +1682,10 @@ png_create_colormap_entry(png_image_read_control *display,
green *= 257;
blue *= 257;
alpha *= 257;
encoding = E_LINEAR;
encoding = P_LINEAR;
}
else if (encoding == E_sRGB && (convert_to_Y || output_encoding == E_LINEAR))
else if (encoding == P_sRGB && (convert_to_Y || output_encoding == P_LINEAR))
{
/* The values are 8-bit sRGB values, but must be converted to 16-bit
* linear.
@ -1688,11 +1694,11 @@ png_create_colormap_entry(png_image_read_control *display,
green = png_sRGB_table[green];
blue = png_sRGB_table[blue];
alpha *= 257;
encoding = E_LINEAR;
encoding = P_LINEAR;
}
/* This is set if the color isn't gray but the output is. */
if (encoding == E_LINEAR)
if (encoding == P_LINEAR)
{
if (convert_to_Y)
{
@ -1700,7 +1706,7 @@ png_create_colormap_entry(png_image_read_control *display,
png_uint_32 y = (png_uint_32)6968 * red + (png_uint_32)23434 * green +
(png_uint_32)2366 * blue;
if (output_encoding == E_LINEAR)
if (output_encoding == P_LINEAR)
y = (y + 16384) >> 15;
else
@ -1709,19 +1715,19 @@ png_create_colormap_entry(png_image_read_control *display,
y = (y + 128) >> 8;
y *= 255;
y = PNG_sRGB_FROM_LINEAR((y + 64) >> 7);
encoding = E_sRGB;
encoding = P_sRGB;
}
blue = red = green = y;
}
else if (output_encoding == E_sRGB)
else if (output_encoding == P_sRGB)
{
red = PNG_sRGB_FROM_LINEAR(red * 255);
green = PNG_sRGB_FROM_LINEAR(green * 255);
blue = PNG_sRGB_FROM_LINEAR(blue * 255);
alpha = PNG_DIV257(alpha);
encoding = E_sRGB;
encoding = P_sRGB;
}
}
@ -1730,7 +1736,7 @@ png_create_colormap_entry(png_image_read_control *display,
/* Store the value. */
{
# ifdef PNG_FORMAT_BGR_SUPPORTED
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
const int afirst = (image->format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
(image->format & PNG_FORMAT_FLAG_ALPHA) != 0;
# else
@ -1742,7 +1748,7 @@ png_create_colormap_entry(png_image_read_control *display,
# define bgr 0
# endif
if (output_encoding == E_LINEAR)
if (output_encoding == P_LINEAR)
{
png_uint_16p entry = png_voidcast(png_uint_16p, display->colormap);
@ -1797,7 +1803,7 @@ png_create_colormap_entry(png_image_read_control *display,
}
}
else /* output encoding is E_sRGB */
else /* output encoding is P_sRGB */
{
png_bytep entry = png_voidcast(png_bytep, display->colormap);
@ -1839,7 +1845,7 @@ make_gray_file_colormap(png_image_read_control *display)
unsigned int i;
for (i=0; i<256; ++i)
png_create_colormap_entry(display, i, i, i, i, 255, E_FILE);
png_create_colormap_entry(display, i, i, i, i, 255, P_FILE);
return i;
}
@ -1850,7 +1856,7 @@ make_gray_colormap(png_image_read_control *display)
unsigned int i;
for (i=0; i<256; ++i)
png_create_colormap_entry(display, i, i, i, i, 255, E_sRGB);
png_create_colormap_entry(display, i, i, i, i, 255, P_sRGB);
return i;
}
@ -1889,13 +1895,13 @@ make_ga_colormap(png_image_read_control *display)
while (i < 231)
{
unsigned int gray = (i * 256 + 115) / 231;
png_create_colormap_entry(display, i++, gray, gray, gray, 255, E_sRGB);
png_create_colormap_entry(display, i++, gray, gray, gray, 255, P_sRGB);
}
/* 255 is used here for the component values for consistency with the code
* that undoes premultiplication in pngwrite.c.
*/
png_create_colormap_entry(display, i++, 255, 255, 255, 0, E_sRGB);
png_create_colormap_entry(display, i++, 255, 255, 255, 0, P_sRGB);
for (a=1; a<5; ++a)
{
@ -1903,7 +1909,7 @@ make_ga_colormap(png_image_read_control *display)
for (g=0; g<6; ++g)
png_create_colormap_entry(display, i++, g*51, g*51, g*51, a*51,
E_sRGB);
P_sRGB);
}
return i;
@ -1927,7 +1933,7 @@ make_rgb_colormap(png_image_read_control *display)
for (b=0; b<6; ++b)
png_create_colormap_entry(display, i++, r*51, g*51, b*51, 255,
E_sRGB);
P_sRGB);
}
}
@ -1950,11 +1956,11 @@ png_image_read_colormap(png_voidp argument)
const png_structrp png_ptr = image->opaque->png_ptr;
const png_uint_32 output_format = image->format;
const int output_encoding = (output_format & PNG_FORMAT_FLAG_LINEAR) ?
E_LINEAR : E_sRGB;
P_LINEAR : P_sRGB;
unsigned int cmap_entries;
unsigned int output_processing; /* Output processing option */
unsigned int data_encoding = E_NOTSET; /* Encoding libpng must produce */
unsigned int data_encoding = P_NOTSET; /* Encoding libpng must produce */
/* Background information; the background color and the index of this color
* in the color-map if it exists (else 256).
@ -1974,7 +1980,7 @@ png_image_read_colormap(png_voidp argument)
png_ptr->num_trans > 0) /* alpha in input */ &&
((output_format & PNG_FORMAT_FLAG_ALPHA) == 0) /* no alpha in output */)
{
if (output_encoding == E_LINEAR) /* compose on black */
if (output_encoding == P_LINEAR) /* compose on black */
back_b = back_g = back_r = 0;
else if (display->background == NULL /* no way to remove it */)
@ -1998,7 +2004,7 @@ png_image_read_colormap(png_voidp argument)
}
}
else if (output_encoding == E_LINEAR)
else if (output_encoding == P_LINEAR)
back_b = back_r = back_g = 65535;
else
@ -2056,7 +2062,7 @@ png_image_read_colormap(png_voidp argument)
trans = png_ptr->trans_color.gray;
if ((output_format & PNG_FORMAT_FLAG_ALPHA) == 0)
back_alpha = output_encoding == E_LINEAR ? 65535 : 255;
back_alpha = output_encoding == P_LINEAR ? 65535 : 255;
}
/* png_create_colormap_entry just takes an RGBA and writes the
@ -2074,7 +2080,7 @@ png_image_read_colormap(png_voidp argument)
*/
if (i != trans)
png_create_colormap_entry(display, i, val, val, val, 255,
E_FILE/*8-bit with file gamma*/);
P_FILE/*8-bit with file gamma*/);
/* Else this entry is transparent. The colors don't matter if
* there is an alpha channel (back_alpha == 0), but it does no
@ -2090,7 +2096,7 @@ png_image_read_colormap(png_voidp argument)
}
/* We need libpng to preserve the original encoding. */
data_encoding = E_FILE;
data_encoding = P_FILE;
/* The rows from libpng, while technically gray values, are now also
* color-map indicies; however, they may need to be expanded to 1
@ -2119,7 +2125,7 @@ png_image_read_colormap(png_voidp argument)
* ensuring that the corresponding gray level matches the background
* color exactly.
*/
data_encoding = E_sRGB;
data_encoding = P_sRGB;
if (PNG_GRAY_COLORMAP_ENTRIES > image->colormap_entries)
png_error(png_ptr, "gray[16] color-map: too few entries");
@ -2143,7 +2149,7 @@ png_image_read_colormap(png_voidp argument)
png_color_16 c;
png_uint_32 gray = back_g;
if (output_encoding == E_LINEAR)
if (output_encoding == P_LINEAR)
{
gray = PNG_sRGB_FROM_LINEAR(gray * 255);
@ -2151,7 +2157,7 @@ png_image_read_colormap(png_voidp argument)
* matches.
*/
png_create_colormap_entry(display, gray, back_g, back_g,
back_g, 65535, E_LINEAR);
back_g, 65535, P_LINEAR);
}
/* The background passed to libpng, however, must be the
@ -2172,7 +2178,7 @@ png_image_read_colormap(png_voidp argument)
break;
}
back_alpha = output_encoding == E_LINEAR ? 65535 : 255;
back_alpha = output_encoding == P_LINEAR ? 65535 : 255;
}
/* output_processing means that the libpng-processed row will be
@ -2209,7 +2215,7 @@ png_image_read_colormap(png_voidp argument)
* worry about tRNS matching - tRNS is ignored if there is an alpha
* channel.
*/
data_encoding = E_sRGB;
data_encoding = P_sRGB;
if (output_format & PNG_FORMAT_FLAG_ALPHA)
{
@ -2252,13 +2258,13 @@ png_image_read_colormap(png_voidp argument)
cmap_entries = make_gray_colormap(display);
if (output_encoding == E_LINEAR)
if (output_encoding == P_LINEAR)
{
gray = PNG_sRGB_FROM_LINEAR(gray * 255);
/* And make sure the corresponding palette entry matches. */
png_create_colormap_entry(display, gray, back_g, back_g,
back_g, 65535, E_LINEAR);
back_g, 65535, P_LINEAR);
}
/* The background passed to libpng, however, must be the sRGB
@ -2289,7 +2295,7 @@ png_image_read_colormap(png_voidp argument)
{
png_uint_32 gray = (i * 256 + 115) / 231;
png_create_colormap_entry(display, i++, gray, gray, gray,
255, E_sRGB);
255, P_sRGB);
}
/* NOTE: this preserves the full precision of the application
@ -2297,7 +2303,7 @@ png_image_read_colormap(png_voidp argument)
*/
background_index = i;
png_create_colormap_entry(display, i++, back_r, back_g, back_b,
output_encoding == E_LINEAR ? 65535U : 255U, output_encoding);
output_encoding == P_LINEAR ? 65535U : 255U, output_encoding);
/* For non-opaque input composite on the sRGB background - this
* requires inverting the encoding for each component. The input
@ -2307,7 +2313,7 @@ png_image_read_colormap(png_voidp argument)
* represents. Consequently 'G' is always sRGB encoded, while
* 'A' is linear. We need the linear background colors.
*/
if (output_encoding == E_sRGB) /* else already linear */
if (output_encoding == P_sRGB) /* else already linear */
{
/* This may produce a value not exactly matching the
* background, but that's ok because these numbers are only
@ -2337,7 +2343,7 @@ png_image_read_colormap(png_voidp argument)
png_create_colormap_entry(display, i++,
PNG_sRGB_FROM_LINEAR(gray + back_rx),
PNG_sRGB_FROM_LINEAR(gray + back_gx),
PNG_sRGB_FROM_LINEAR(gray + back_bx), 255, E_sRGB);
PNG_sRGB_FROM_LINEAR(gray + back_bx), 255, P_sRGB);
}
}
@ -2364,7 +2370,7 @@ png_image_read_colormap(png_voidp argument)
*/
png_set_rgb_to_gray_fixed(png_ptr, PNG_ERROR_ACTION_NONE, -1,
-1);
data_encoding = E_sRGB;
data_encoding = P_sRGB;
/* The output will now be one or two 8-bit gray or gray+alpha
* channels. The more complex case arises when the input has alpha.
@ -2409,7 +2415,7 @@ png_image_read_colormap(png_voidp argument)
png_gamma_not_sRGB(png_ptr->colorspace.gamma))
{
cmap_entries = make_gray_file_colormap(display);
data_encoding = E_FILE;
data_encoding = P_FILE;
}
else
@ -2428,18 +2434,18 @@ png_image_read_colormap(png_voidp argument)
* it. Achieve this simply by ensuring that the entry
* selected for the background really is the background color.
*/
if (data_encoding == E_FILE) /* from the fixup above */
if (data_encoding == P_FILE) /* from the fixup above */
{
/* The app supplied a gray which is in output_encoding, we
* need to convert it to a value of the input (E_FILE)
* need to convert it to a value of the input (P_FILE)
* encoding then set this palette entry to the required
* output encoding.
*/
if (output_encoding == E_sRGB)
gray = png_sRGB_table[gray]; /* now E_LINEAR */
if (output_encoding == P_sRGB)
gray = png_sRGB_table[gray]; /* now P_LINEAR */
gray = PNG_DIV257(png_gamma_16bit_correct(gray,
png_ptr->colorspace.gamma)); /* now E_FILE */
png_ptr->colorspace.gamma)); /* now P_FILE */
/* And make sure the corresponding palette entry contains
* exactly the required sRGB value.
@ -2448,14 +2454,14 @@ png_image_read_colormap(png_voidp argument)
back_g, 0/*unused*/, output_encoding);
}
else if (output_encoding == E_LINEAR)
else if (output_encoding == P_LINEAR)
{
gray = PNG_sRGB_FROM_LINEAR(gray * 255);
/* And make sure the corresponding palette entry matches.
*/
png_create_colormap_entry(display, gray, back_g, back_g,
back_g, 0/*unused*/, E_LINEAR);
back_g, 0/*unused*/, P_LINEAR);
}
/* The background passed to libpng, however, must be the
@ -2485,7 +2491,7 @@ png_image_read_colormap(png_voidp argument)
* to do it once and using PNG_DIV51 on the 6x6x6 reduced RGB cube.
* Consequently we always want libpng to produce sRGB data.
*/
data_encoding = E_sRGB;
data_encoding = P_sRGB;
/* Is there any transparency or alpha? */
if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
@ -2505,7 +2511,7 @@ png_image_read_colormap(png_voidp argument)
/* Add a transparent entry. */
png_create_colormap_entry(display, cmap_entries, 255, 255,
255, 0, E_sRGB);
255, 0, P_sRGB);
/* This is stored as the background index for the processing
* algorithm.
@ -2526,7 +2532,7 @@ png_image_read_colormap(png_voidp argument)
*/
for (b=0; b<256; b = (b << 1) | 0x7f)
png_create_colormap_entry(display, cmap_entries++,
r, g, b, 128, E_sRGB);
r, g, b, 128, P_sRGB);
}
}
@ -2555,7 +2561,7 @@ png_image_read_colormap(png_voidp argument)
png_create_colormap_entry(display, cmap_entries, back_r,
back_g, back_b, 0/*unused*/, output_encoding);
if (output_encoding == E_LINEAR)
if (output_encoding == P_LINEAR)
{
r = PNG_sRGB_FROM_LINEAR(back_r * 255);
g = PNG_sRGB_FROM_LINEAR(back_g * 255);
@ -2595,11 +2601,11 @@ png_image_read_colormap(png_voidp argument)
*/
for (b=0; b<256; b = (b << 1) | 0x7f)
png_create_colormap_entry(display, cmap_entries++,
png_colormap_compose(display, r, E_sRGB, 128,
png_colormap_compose(display, r, P_sRGB, 128,
back_r, output_encoding),
png_colormap_compose(display, g, E_sRGB, 128,
png_colormap_compose(display, g, P_sRGB, 128,
back_g, output_encoding),
png_colormap_compose(display, b, E_sRGB, 128,
png_colormap_compose(display, b, P_sRGB, 128,
back_b, output_encoding),
0/*unused*/, output_encoding);
}
@ -2658,7 +2664,7 @@ png_image_read_colormap(png_voidp argument)
num_trans = 0;
output_processing = PNG_CMAP_NONE;
data_encoding = E_FILE; /* Don't change from color-map indicies */
data_encoding = P_FILE; /* Don't change from color-map indicies */
cmap_entries = png_ptr->num_palette;
if (cmap_entries > 256)
cmap_entries = 256;
@ -2680,13 +2686,13 @@ png_image_read_colormap(png_voidp argument)
* on the sRGB color in 'back'.
*/
png_create_colormap_entry(display, i,
png_colormap_compose(display, colormap[i].red, E_FILE,
png_colormap_compose(display, colormap[i].red, P_FILE,
trans[i], back_r, output_encoding),
png_colormap_compose(display, colormap[i].green, E_FILE,
png_colormap_compose(display, colormap[i].green, P_FILE,
trans[i], back_g, output_encoding),
png_colormap_compose(display, colormap[i].blue, E_FILE,
png_colormap_compose(display, colormap[i].blue, P_FILE,
trans[i], back_b, output_encoding),
output_encoding == E_LINEAR ? trans[i] * 257U :
output_encoding == P_LINEAR ? trans[i] * 257U :
trans[i],
output_encoding);
}
@ -2695,7 +2701,7 @@ png_image_read_colormap(png_voidp argument)
else
png_create_colormap_entry(display, i, colormap[i].red,
colormap[i].green, colormap[i].blue,
i < num_trans ? trans[i] : 255U, E_FILE/*8-bit*/);
i < num_trans ? trans[i] : 255U, P_FILE/*8-bit*/);
}
/* The PNG data may have indicies packed in fewer than 8 bits, it
@ -2723,12 +2729,12 @@ png_image_read_colormap(png_voidp argument)
png_error(png_ptr, "bad data option (internal error)");
break;
case E_sRGB:
case P_sRGB:
/* Change to 8-bit sRGB */
png_set_alpha_mode_fixed(png_ptr, PNG_ALPHA_PNG, PNG_GAMMA_sRGB);
/* FALL THROUGH */
case E_FILE:
case P_FILE:
if (png_ptr->bit_depth > 8)
png_set_scale_16(png_ptr);
break;
@ -3277,7 +3283,12 @@ png_image_read_background(png_voidp argument)
png_error(png_ptr, "unknown interlace type");
}
switch (png_get_bit_depth(png_ptr, info_ptr))
/* Use direct access to info_ptr here because otherwise the simplified API
* would require PNG_EASY_ACCESS_SUPPORTED (just for this.) Note this is
* checking the value after libpng expansions, not the original value in the
* PNG.
*/
switch (info_ptr->bit_depth)
{
default:
png_error(png_ptr, "unexpected bit depth");
@ -3425,8 +3436,10 @@ png_image_read_background(png_voidp argument)
unsigned int outchannels = 1+preserve_alpha;
int swap_alpha = 0;
if (preserve_alpha && (image->format & PNG_FORMAT_FLAG_AFIRST))
swap_alpha = 1;
# ifdef PNG_SIMPLIFIED_READ_AFIRST_SUPPORTED
if (preserve_alpha && (image->format & PNG_FORMAT_FLAG_AFIRST))
swap_alpha = 1;
# endif
for (pass = 0; pass < passes; ++pass)
{

2
pngwio.c
View File

@ -149,6 +149,8 @@ png_set_write_fn(png_structrp png_ptr, png_voidp io_ptr,
# else
png_ptr->output_flush_fn = output_flush_fn;
# endif
#else
PNG_UNUSED(output_flush_fn)
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
#ifdef PNG_READ_SUPPORTED

35
pngwrite.c
View File

@ -1624,14 +1624,16 @@ png_write_image_16bit(png_voidp argument)
if (image->format & PNG_FORMAT_FLAG_ALPHA)
{
if (image->format & PNG_FORMAT_FLAG_AFIRST)
{
aindex = -1;
++input_row; /* To point to the first component */
++output_row;
}
# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED
if (image->format & PNG_FORMAT_FLAG_AFIRST)
{
aindex = -1;
++input_row; /* To point to the first component */
++output_row;
}
else
else
# endif
aindex = channels;
}
@ -1780,14 +1782,16 @@ png_write_image_8bit(png_voidp argument)
png_bytep row_end;
int aindex;
if (image->format & PNG_FORMAT_FLAG_AFIRST)
{
aindex = -1;
++input_row; /* To point to the first component */
++output_row;
}
# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED
if (image->format & PNG_FORMAT_FLAG_AFIRST)
{
aindex = -1;
++input_row; /* To point to the first component */
++output_row;
}
else
else
# endif
aindex = channels;
/* Use row_end in place of a loop counter: */
@ -1867,7 +1871,8 @@ png_image_set_PLTE(png_image_write_control *display)
const png_uint_32 format = image->format;
const int channels = PNG_IMAGE_SAMPLE_CHANNELS(format);
# ifdef PNG_FORMAT_BGR_SUPPORTED
# if defined(PNG_FORMAT_BGR_SUPPORTED) &&\
defined(PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED)
const int afirst = (format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
(format & PNG_FORMAT_FLAG_ALPHA) != 0;
# else

2
projects/vstudio/readme.txt
View File

@ -1,7 +1,7 @@
VisualStudio instructions
libpng version 1.7.0beta23 - November 7, 2013
libpng version 1.7.0beta23 - November 22, 2013
Copyright (c) 1998-2010 Glenn Randers-Pehrson

2
projects/vstudio/zlib.props
View File

@ -2,7 +2,7 @@
<!--
* zlib.props - location of zlib source
*
* libpng version 1.7.0beta23 - November 7, 2013
* libpng version 1.7.0beta23 - November 22, 2013
*
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
*

2
scripts/README.txt
View File

@ -1,5 +1,5 @@
Makefiles for libpng version 1.7.0beta23 - November 7, 2013
Makefiles for libpng version 1.7.0beta23 - November 22, 2013
pnglibconf.h.prebuilt => Stores configuration settings
makefile.linux => Linux/ELF makefile

9
scripts/options.awk
View File

@ -282,7 +282,7 @@ $1 == "option" && NF >= 2{
for (i=istart; i<=NF; ++i) {
val=$(i)
sub(/,$/,"",val)
if (val == "on" || val == "off" || val == "disabled") {
if (val == "on" || val == "off" || val == "disabled" || val =="enabled") {
key = ""
if (onoff != val) {
# on or off can zap disabled or enabled:
@ -687,9 +687,11 @@ END{
}
# if
have_ifs = 0
nreqs = split(iffs[i], r)
print "#undef PNG_no_if" >out
if (nreqs > 0) {
have_ifs = 1
print "/* if" iffs[i], "*/" >out
print "#define PNG_no_if 1" >out
for (j=1; j<=nreqs; ++j) {
@ -727,7 +729,10 @@ END{
print "# ifndef PNG_" i "_SUPPORTED /*!command line*/" >out
print "# ifdef PNG_not_enabled /*!enabled*/" >out
if (option[i] == "off" || option[i] == "disabled" && everything != "on" || option[i] == "enabled" && everything == "off") {
# 'have_ifs' here means that everything = "off" still allows an 'if' on
# an otherwise enabled option to turn it on; otherwise the 'if'
# handling is effectively disabled by 'everything = off'
if (option[i] == "off" || option[i] == "disabled" && everything != "on" || option[i] == "enabled" && everything == "off" && !have_ifs) {
print "# undef PNG_on /*default off*/" >out
} else {
print "# ifdef PNG_NO_" i >out

61
scripts/pnglibconf.dfa
View File

@ -328,12 +328,16 @@ option BENIGN_READ_ERRORS requires BENIGN_ERRORS
option MNG_FEATURES
# Arithmetic options, the first is the big switch that chooses between internal
# floating and fixed point arithmetic implementations - it does not affect any
# floating and fixed point arithmetic implementations - it does not affect an
# APIs. The second two (the _POINT settings) switch off individual APIs.
#
# Prior to libpng 1.6.8 one of the API (_POINT) variants had to be selected. At
# 1.6.8 this restriction has been removed; the simplified API can be used
# without enabling any of the low level fixed/floating APIs.
option FLOATING_ARITHMETIC
option FLOATING_POINT enables ok_math
option FIXED_POINT enables ok_math
option FLOATING_POINT
option FIXED_POINT
# The following is always on (defined empty)
@ -461,7 +465,7 @@ option READ_TRANSFORMS requires READ
# If you handle gamma issues outside libpng then you do not need the libpng
# gamma processing; and it is an enormous waste of space. You just need to
# remove the use of libpng APIs that depend on it.
option READ_GAMMA requires READ_TRANSFORMS, READ_gAMA
option READ_GAMMA requires READ_TRANSFORMS, READ_gAMA, READ_sRGB
option READ_ALPHA_MODE requires READ_TRANSFORMS, READ_GAMMA
option READ_BACKGROUND requires READ_TRANSFORMS, READ_STRIP_ALPHA, READ_GAMMA
@ -474,7 +478,7 @@ option READ_INVERT_ALPHA requires READ_TRANSFORMS
option READ_INVERT requires READ_TRANSFORMS
option READ_PACK requires READ_TRANSFORMS
option READ_PACKSWAP requires READ_TRANSFORMS
option READ_RGB_TO_GRAY requires READ_TRANSFORMS, READ_GAMMA
option READ_RGB_TO_GRAY requires READ_TRANSFORMS, READ_GAMMA enables COLORSPACE
option READ_SCALE_16_TO_8 requires READ_TRANSFORMS
option READ_SHIFT requires READ_TRANSFORMS
option READ_STRIP_16_TO_8 requires READ_TRANSFORMS
@ -831,13 +835,13 @@ option SAVE_INT_32 disabled
option WRITE_OPTIMIZE_CMF requires WRITE
option READ_COMPRESSED_TEXT disabled
option READ_iCCP enables READ_COMPRESSED_TEXT
option READ_iTXt enables READ_COMPRESSED_TEXT
option READ_zTXt enables READ_COMPRESSED_TEXT
option READ_COMPRESSED_TEXT enables READ_TEXT
option WRITE_oFFs enables SAVE_INT_32
option WRITE_pCAL enables SAVE_INT_32
option WRITE_cHRM enables SAVE_INT_32
option WRITE_COMPRESSED_TEXT disabled
option WRITE_iCCP enables WRITE_COMPRESSED_TEXT
@ -865,30 +869,41 @@ option READ_GET_PALETTE_MAX requires READ_CHECK_FOR_INVALID_INDEX disabled
option WRITE_GET_PALETTE_MAX requires WRITE_CHECK_FOR_INVALID_INDEX disabled
# Simplified API options (added at libpng-1.6.0)
# In libpng 1.6.8 the handling of these options was changed to used 'requires'
# throughout, so that disabling some of the low level support always disables
# the base simplified read/write API. This much simplifies the handling and
# makes 'everything = off' work in a more intuitive way. It eliminates a
# previously reported feature that APIs previously enabled by the simplified
# API couldn't be turned off without explicitly turning off the simplified
# APIs.
#
# Read:
option SIMPLIFIED_READ,
requires SEQUENTIAL_READ READ_TRANSFORMS, SETJMP, BENIGN_ERRORS READ_GAMMA,
enables READ_EXPAND, READ_16BIT READ_EXPAND_16, READ_SCALE_16_TO_8,
READ_RGB_TO_GRAY, READ_ALPHA_MODE READ_BACKGROUND READ_STRIP_ALPHA,
READ_FILLER, READ_SWAP
requires SEQUENTIAL_READ, READ_TRANSFORMS, SETJMP, BENIGN_ERRORS,
READ_EXPAND, READ_16BIT, READ_EXPAND_16, READ_SCALE_16_TO_8,
READ_RGB_TO_GRAY, READ_ALPHA_MODE, READ_BACKGROUND, READ_STRIP_ALPHA,
READ_FILLER, READ_SWAP, READ_PACK, READ_GRAY_TO_RGB, READ_GAMMA,
READ_tRNS, READ_bKGD, READ_gAMA, READ_cHRM, READ_sRGB, READ_sBIT
option SIMPLIFIED_READ_AFIRST requires SIMPLIFIED_READ disabled
option READ_SWAP_ALPHA enables SIMPLIFIED_READ_AFIRST
option SIMPLIFIED_READ_BGR requires SIMPLIFIED_READ disabled
option READ_BGR enables SIMPLIFIED_READ_BGR
# AFIRST and BGR read options:
# Prior to libpng 1.6.8 these were disabled but switched on if the low level
# libpng routines that do the swaps were enabled. This worked but was
# confusing. In libpng 1.6.8 the options were changed to simple 'requires'
# and are enabled by default. This should work the same way in practice.
option SIMPLIFIED_READ_AFIRST enables FORMAT_AFIRST,
requires SIMPLIFIED_READ READ_SWAP_ALPHA
# Write:
option SIMPLIFIED_WRITE,
requires WRITE STDIO, SETJMP,
enables WRITE_SWAP WRITE_gAMA, WRITE_sRGB WRITE_cHRM
requires WRITE STDIO, SETJMP, WRITE_SWAP, WRITE_PACK,
WRITE_tRNS, WRITE_gAMA, WRITE_sRGB, WRITE_cHRM
option SIMPLIFIED_WRITE_AFIRST requires SIMPLIFIED_WRITE disabled
option WRITE_SWAP_ALPHA enables SIMPLIFIED_WRITE_AFIRST
option SIMPLIFIED_WRITE_AFIRST enables FORMAT_AFIRST,
requires SIMPLIFIED_WRITE WRITE_SWAP_ALPHA
option SIMPLIFIED_WRITE_BGR requires SIMPLIFIED_WRITE disabled
option WRITE_BGR enables SIMPLIFIED_WRITE_BGR
option SIMPLIFIED_WRITE_BGR enables FORMAT_BGR,
requires SIMPLIFIED_WRITE WRITE_BGR
# Formats:
option FORMAT_AFIRST if SIMPLIFIED_READ_AFIRST, SIMPLIFIED_WRITE_AFIRST
option FORMAT_BGR if SIMPLIFIED_READ_BGR, SIMPLIFIED_WRITE_BGR
option FORMAT_AFIRST disabled
option FORMAT_BGR disabled

2
scripts/pnglibconf.h.prebuilt
View File

@ -2,7 +2,7 @@
/* pnglibconf.h - library build configuration */
/* Libpng version 1.7.0beta23 - November 7, 2013 */
/* Libpng version 1.7.0beta23 - November 22, 2013 */
/* Copyright (c) 1998-2013 Glenn Randers-Pehrson */