Partial Symbian ports for libpng and SDL_image, needed by UQM S60 port.
git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@3055 8092fc87-c524-0410-9efc-e669fe64eaf9
This commit is contained in:
gewlitys
@@ -0,0 +1,458 @@
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||||
14. If you wish to incorporate parts of the Library into other free
|
||||
programs whose distribution conditions are incompatible with these,
|
||||
write to the author to ask for permission. For software which is
|
||||
copyrighted by the Free Software Foundation, write to the Free
|
||||
Software Foundation; we sometimes make exceptions for this. Our
|
||||
decision will be guided by the two goals of preserving the free status
|
||||
of all derivatives of our free software and of promoting the sharing
|
||||
and reuse of software generally.
|
||||
|
||||
NO WARRANTY
|
||||
|
||||
15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
|
||||
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
|
||||
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
|
||||
OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
|
||||
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
|
||||
LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
|
||||
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||
|
||||
16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
|
||||
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
|
||||
AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
|
||||
FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
|
||||
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
|
||||
LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
|
||||
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
|
||||
FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
|
||||
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
||||
DAMAGES.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
@@ -0,0 +1,109 @@
|
||||
|
||||
This copy of the libpng notices is provided for your convenience. In case of
|
||||
any discrepancy between this copy and the notices in the file png.h that is
|
||||
included in the libpng distribution, the latter shall prevail.
|
||||
|
||||
COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
|
||||
|
||||
If you modify libpng you may insert additional notices immediately following
|
||||
this sentence.
|
||||
|
||||
libpng versions 1.2.6, August 15, 2004, through 1.2.25, February 18, 2008, are
|
||||
Copyright (c) 2004, 2006-2008 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
|
||||
|
||||
Cosmin Truta
|
||||
|
||||
libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are
|
||||
Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
|
||||
distributed according to the same disclaimer and license as libpng-1.0.6
|
||||
with the following individuals added to the list of Contributing Authors
|
||||
|
||||
Simon-Pierre Cadieux
|
||||
Eric S. Raymond
|
||||
Gilles Vollant
|
||||
|
||||
and with the following additions to the disclaimer:
|
||||
|
||||
There is no warranty against interference with your enjoyment of the
|
||||
library or against infringement. There is no warranty that our
|
||||
efforts or the library will fulfill any of your particular purposes
|
||||
or needs. This library is provided with all faults, and the entire
|
||||
risk of satisfactory quality, performance, accuracy, and effort is with
|
||||
the user.
|
||||
|
||||
libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
|
||||
Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are
|
||||
distributed according to the same disclaimer and license as libpng-0.96,
|
||||
with the following individuals added to the list of Contributing Authors:
|
||||
|
||||
Tom Lane
|
||||
Glenn Randers-Pehrson
|
||||
Willem van Schaik
|
||||
|
||||
libpng versions 0.89, June 1996, through 0.96, May 1997, are
|
||||
Copyright (c) 1996, 1997 Andreas Dilger
|
||||
Distributed according to the same disclaimer and license as libpng-0.88,
|
||||
with the following individuals added to the list of Contributing Authors:
|
||||
|
||||
John Bowler
|
||||
Kevin Bracey
|
||||
Sam Bushell
|
||||
Magnus Holmgren
|
||||
Greg Roelofs
|
||||
Tom Tanner
|
||||
|
||||
libpng versions 0.5, May 1995, through 0.88, January 1996, are
|
||||
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
|
||||
For the purposes of this copyright and license, "Contributing Authors"
|
||||
is defined as the following set of individuals:
|
||||
|
||||
Andreas Dilger
|
||||
Dave Martindale
|
||||
Guy Eric Schalnat
|
||||
Paul Schmidt
|
||||
Tim Wegner
|
||||
|
||||
The PNG Reference Library is supplied "AS IS". The Contributing Authors
|
||||
and Group 42, Inc. disclaim all warranties, expressed or implied,
|
||||
including, without limitation, the warranties of merchantability and of
|
||||
fitness for any purpose. The Contributing Authors and Group 42, Inc.
|
||||
assume no liability for direct, indirect, incidental, special, exemplary,
|
||||
or consequential damages, which may result from the use of the PNG
|
||||
Reference Library, even if advised of the possibility of such damage.
|
||||
|
||||
Permission is hereby granted to use, copy, modify, and distribute this
|
||||
source code, or portions hereof, for any purpose, without fee, subject
|
||||
to the following restrictions:
|
||||
|
||||
1. The origin of this source code must not be misrepresented.
|
||||
|
||||
2. Altered versions must be plainly marked as such and must not
|
||||
be misrepresented as being the original source.
|
||||
|
||||
3. This Copyright notice may not be removed or altered from any
|
||||
source or altered source distribution.
|
||||
|
||||
The Contributing Authors and Group 42, Inc. specifically permit, without
|
||||
fee, and encourage the use of this source code as a component to
|
||||
supporting the PNG file format in commercial products. If you use this
|
||||
source code in a product, acknowledgment is not required but would be
|
||||
appreciated.
|
||||
|
||||
|
||||
A "png_get_copyright" function is available, for convenient use in "about"
|
||||
boxes and the like:
|
||||
|
||||
printf("%s",png_get_copyright(NULL));
|
||||
|
||||
Also, the PNG logo (in PNG format, of course) is supplied in the
|
||||
files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
|
||||
|
||||
Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a
|
||||
certification mark of the Open Source Initiative.
|
||||
|
||||
Glenn Randers-Pehrson
|
||||
glennrp at users.sourceforge.net
|
||||
February 18, 2008
|
||||
@@ -0,0 +1,7 @@
|
||||
Libpng and a small subset of SDL_image ported to Symbian, to be used with
|
||||
Ur-Quan Masters.
|
||||
|
||||
TODO: a proper port of both libraries.
|
||||
|
||||
http://www.libpng.org/pub/png/libpng.html
|
||||
http://www.libsdl.org/projects/SDL_image/
|
||||
@@ -0,0 +1,8 @@
|
||||
PRJ_PLATFORMS
|
||||
DEFAULT
|
||||
|
||||
PRJ_EXPORTS
|
||||
..\inc\SDL_image.h
|
||||
|
||||
PRJ_MMPFILES
|
||||
SDL_image.mmp
|
||||
@@ -0,0 +1,30 @@
|
||||
TARGET SDL_image.lib
|
||||
TARGETTYPE lib
|
||||
UID 0
|
||||
|
||||
USERINCLUDE ..\inc
|
||||
SYSTEMINCLUDE \epoc32\include\stdapis
|
||||
SYSTEMINCLUDE \epoc32\include
|
||||
SYSTEMINCLUDE \epoc32\include\SDL
|
||||
|
||||
SOURCEPATH ..\src
|
||||
|
||||
SOURCE png.c
|
||||
SOURCE pngerror.c
|
||||
SOURCE pnggccrd.c
|
||||
SOURCE pngget.c
|
||||
SOURCE pngmem.c
|
||||
SOURCE pngpread.c
|
||||
SOURCE pngread.c
|
||||
SOURCE pngrio.c
|
||||
SOURCE pngrtran.c
|
||||
SOURCE pngrutil.c
|
||||
SOURCE pngset.c
|
||||
SOURCE pngtest.c
|
||||
SOURCE pngtrans.c
|
||||
SOURCE pngvcrd.c
|
||||
SOURCE pngwio.c
|
||||
SOURCE pngwrite.c
|
||||
SOURCE pngwtran.c
|
||||
SOURCE pngwutil.c
|
||||
SOURCE SDL_image.c
|
||||
@@ -0,0 +1,7 @@
|
||||
#ifndef SDL_IMAGE_H
|
||||
#define SDL_IMAGE_H
|
||||
|
||||
SDL_Surface * IMG_Load_RW(SDL_RWops *src, int freesrc);
|
||||
SDL_Surface * IMG_LoadPNG_RW(SDL_RWops *src);
|
||||
|
||||
#endif
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,379 @@
|
||||
/* Quick'n'dirty Symbian S60 port of SDL_image png loader for UQM */
|
||||
|
||||
/*
|
||||
SDL_image: An example image loading library for use with SDL
|
||||
Copyright (C) 1997-2006 Sam Lantinga
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this library; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
|
||||
Sam Lantinga
|
||||
slouken@libsdl.org
|
||||
*/
|
||||
|
||||
/* This is a PNG image file loading framework */
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#include <SDL.h>
|
||||
#include "SDL_image.h"
|
||||
|
||||
/*=============================================================================
|
||||
File: SDL_png.c
|
||||
Purpose: A PNG loader and saver for the SDL library
|
||||
Revision:
|
||||
Created by: Philippe Lavoie (2 November 1998)
|
||||
lavoie@zeus.genie.uottawa.ca
|
||||
Modified by:
|
||||
|
||||
Copyright notice:
|
||||
Copyright (C) 1998 Philippe Lavoie
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Library General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Library General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Library General Public
|
||||
License along with this library; if not, write to the Free
|
||||
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
|
||||
Comments: The load and save routine are basically the ones you can find
|
||||
in the example.c file from the libpng distribution.
|
||||
|
||||
Changes:
|
||||
5/17/99 - Modified to use the new SDL data sources - Sam Lantinga
|
||||
|
||||
=============================================================================*/
|
||||
|
||||
#include <SDL_endian.h>
|
||||
|
||||
#ifdef macintosh
|
||||
#define MACOS
|
||||
#endif
|
||||
#include "png.h"
|
||||
|
||||
|
||||
static struct {
|
||||
int loaded;
|
||||
void *handle;
|
||||
png_infop (*png_create_info_struct) (png_structp png_ptr);
|
||||
png_structp (*png_create_read_struct) (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn);
|
||||
void (*png_destroy_read_struct) (png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr);
|
||||
png_uint_32 (*png_get_IHDR) (png_structp png_ptr, png_infop info_ptr, png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, int *interlace_method, int *compression_method, int *filter_method);
|
||||
png_voidp (*png_get_io_ptr) (png_structp png_ptr);
|
||||
png_uint_32 (*png_get_tRNS) (png_structp png_ptr, png_infop info_ptr, png_bytep *trans, int *num_trans, png_color_16p *trans_values);
|
||||
png_uint_32 (*png_get_valid) (png_structp png_ptr, png_infop info_ptr, png_uint_32 flag);
|
||||
void (*png_read_image) (png_structp png_ptr, png_bytepp image);
|
||||
void (*png_read_info) (png_structp png_ptr, png_infop info_ptr);
|
||||
void (*png_read_update_info) (png_structp png_ptr, png_infop info_ptr);
|
||||
void (*png_set_expand) (png_structp png_ptr);
|
||||
void (*png_set_gray_to_rgb) (png_structp png_ptr);
|
||||
void (*png_set_packing) (png_structp png_ptr);
|
||||
void (*png_set_read_fn) (png_structp png_ptr, png_voidp io_ptr, png_rw_ptr read_data_fn);
|
||||
void (*png_set_strip_16) (png_structp png_ptr);
|
||||
int (*png_sig_cmp) (png_bytep sig, png_size_t start, png_size_t num_to_check);
|
||||
} lib;
|
||||
|
||||
int IMG_InitPNG()
|
||||
{
|
||||
if ( lib.loaded == 0 ) {
|
||||
lib.png_create_info_struct = png_create_info_struct;
|
||||
lib.png_create_read_struct = png_create_read_struct;
|
||||
lib.png_destroy_read_struct = png_destroy_read_struct;
|
||||
lib.png_get_IHDR = png_get_IHDR;
|
||||
lib.png_get_io_ptr = png_get_io_ptr;
|
||||
lib.png_get_tRNS = png_get_tRNS;
|
||||
lib.png_get_valid = png_get_valid;
|
||||
lib.png_read_image = png_read_image;
|
||||
lib.png_read_info = png_read_info;
|
||||
lib.png_read_update_info = png_read_update_info;
|
||||
lib.png_set_expand = png_set_expand;
|
||||
lib.png_set_gray_to_rgb = png_set_gray_to_rgb;
|
||||
lib.png_set_packing = png_set_packing;
|
||||
lib.png_set_read_fn = png_set_read_fn;
|
||||
lib.png_set_strip_16 = png_set_strip_16;
|
||||
lib.png_sig_cmp = png_sig_cmp;
|
||||
}
|
||||
++lib.loaded;
|
||||
|
||||
return 0;
|
||||
}
|
||||
void IMG_QuitPNG()
|
||||
{
|
||||
if ( lib.loaded == 0 ) {
|
||||
return;
|
||||
}
|
||||
if ( lib.loaded == 1 ) {
|
||||
}
|
||||
--lib.loaded;
|
||||
}
|
||||
|
||||
/* See if an image is contained in a data source */
|
||||
int IMG_isPNG(SDL_RWops *src)
|
||||
{
|
||||
int start;
|
||||
int is_PNG;
|
||||
Uint8 magic[4];
|
||||
|
||||
if ( !src )
|
||||
return 0;
|
||||
start = SDL_RWtell(src);
|
||||
is_PNG = 0;
|
||||
if ( SDL_RWread(src, magic, 1, sizeof(magic)) == sizeof(magic) ) {
|
||||
if ( magic[0] == 0x89 &&
|
||||
magic[1] == 'P' &&
|
||||
magic[2] == 'N' &&
|
||||
magic[3] == 'G' ) {
|
||||
is_PNG = 1;
|
||||
}
|
||||
}
|
||||
SDL_RWseek(src, start, SEEK_SET);
|
||||
return(is_PNG);
|
||||
}
|
||||
|
||||
/* Load a PNG type image from an SDL datasource */
|
||||
static void png_read_data(png_structp ctx, png_bytep area, png_size_t size)
|
||||
{
|
||||
SDL_RWops *src;
|
||||
|
||||
src = (SDL_RWops *)lib.png_get_io_ptr(ctx);
|
||||
SDL_RWread(src, area, size, 1);
|
||||
}
|
||||
SDL_Surface *IMG_LoadPNG_RW(SDL_RWops *src)
|
||||
{
|
||||
int start;
|
||||
const char *error;
|
||||
SDL_Surface *volatile surface;
|
||||
png_structp png_ptr;
|
||||
png_infop info_ptr;
|
||||
png_uint_32 width, height;
|
||||
int bit_depth, color_type, interlace_type;
|
||||
Uint32 Rmask;
|
||||
Uint32 Gmask;
|
||||
Uint32 Bmask;
|
||||
Uint32 Amask;
|
||||
SDL_Palette *palette;
|
||||
png_bytep *volatile row_pointers;
|
||||
int row, i;
|
||||
volatile int ckey = -1;
|
||||
png_color_16 *transv;
|
||||
|
||||
if ( !src ) {
|
||||
/* The error message has been set in SDL_RWFromFile */
|
||||
return NULL;
|
||||
}
|
||||
start = SDL_RWtell(src);
|
||||
|
||||
if ( IMG_InitPNG() < 0 ) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Initialize the data we will clean up when we're done */
|
||||
error = NULL;
|
||||
png_ptr = NULL; info_ptr = NULL; row_pointers = NULL; surface = NULL;
|
||||
|
||||
/* Create the PNG loading context structure */
|
||||
png_ptr = lib.png_create_read_struct(PNG_LIBPNG_VER_STRING,
|
||||
NULL,NULL,NULL);
|
||||
if (png_ptr == NULL){
|
||||
error = "Couldn't allocate memory for PNG file or incompatible PNG dll";
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* Allocate/initialize the memory for image information. REQUIRED. */
|
||||
info_ptr = lib.png_create_info_struct(png_ptr);
|
||||
if (info_ptr == NULL) {
|
||||
error = "Couldn't create image information for PNG file";
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* Set error handling if you are using setjmp/longjmp method (this is
|
||||
* the normal method of doing things with libpng). REQUIRED unless you
|
||||
* set up your own error handlers in png_create_read_struct() earlier.
|
||||
*/
|
||||
if ( setjmp(png_ptr->jmpbuf) ) {
|
||||
error = "Error reading the PNG file.";
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* Set up the input control */
|
||||
lib.png_set_read_fn(png_ptr, src, png_read_data);
|
||||
|
||||
/* Read PNG header info */
|
||||
lib.png_read_info(png_ptr, info_ptr);
|
||||
lib.png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth,
|
||||
&color_type, &interlace_type, NULL, NULL);
|
||||
|
||||
/* tell libpng to strip 16 bit/color files down to 8 bits/color */
|
||||
lib.png_set_strip_16(png_ptr) ;
|
||||
|
||||
/* Extract multiple pixels with bit depths of 1, 2, and 4 from a single
|
||||
* byte into separate bytes (useful for paletted and grayscale images).
|
||||
*/
|
||||
lib.png_set_packing(png_ptr);
|
||||
|
||||
/* scale greyscale values to the range 0..255 */
|
||||
if(color_type == PNG_COLOR_TYPE_GRAY)
|
||||
lib.png_set_expand(png_ptr);
|
||||
|
||||
/* For images with a single "transparent colour", set colour key;
|
||||
if more than one index has transparency, or if partially transparent
|
||||
entries exist, use full alpha channel */
|
||||
if (lib.png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) {
|
||||
int num_trans;
|
||||
Uint8 *trans;
|
||||
lib.png_get_tRNS(png_ptr, info_ptr, &trans, &num_trans,
|
||||
&transv);
|
||||
if(color_type == PNG_COLOR_TYPE_PALETTE) {
|
||||
/* Check if all tRNS entries are opaque except one */
|
||||
int i, t = -1;
|
||||
for(i = 0; i < num_trans; i++)
|
||||
if(trans[i] == 0) {
|
||||
if(t >= 0)
|
||||
break;
|
||||
t = i;
|
||||
} else if(trans[i] != 255)
|
||||
break;
|
||||
if(i == num_trans) {
|
||||
/* exactly one transparent index */
|
||||
ckey = t;
|
||||
} else {
|
||||
/* more than one transparent index, or translucency */
|
||||
lib.png_set_expand(png_ptr);
|
||||
}
|
||||
} else
|
||||
ckey = 0; /* actual value will be set later */
|
||||
}
|
||||
|
||||
if ( color_type == PNG_COLOR_TYPE_GRAY_ALPHA )
|
||||
lib.png_set_gray_to_rgb(png_ptr);
|
||||
|
||||
lib.png_read_update_info(png_ptr, info_ptr);
|
||||
|
||||
lib.png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth,
|
||||
&color_type, &interlace_type, NULL, NULL);
|
||||
|
||||
/* Allocate the SDL surface to hold the image */
|
||||
Rmask = Gmask = Bmask = Amask = 0 ;
|
||||
if ( color_type != PNG_COLOR_TYPE_PALETTE ) {
|
||||
if ( SDL_BYTEORDER == SDL_LIL_ENDIAN ) {
|
||||
Rmask = 0x000000FF;
|
||||
Gmask = 0x0000FF00;
|
||||
Bmask = 0x00FF0000;
|
||||
Amask = (info_ptr->channels == 4) ? 0xFF000000 : 0;
|
||||
} else {
|
||||
int s = (info_ptr->channels == 4) ? 0 : 8;
|
||||
Rmask = 0xFF000000 >> s;
|
||||
Gmask = 0x00FF0000 >> s;
|
||||
Bmask = 0x0000FF00 >> s;
|
||||
Amask = 0x000000FF >> s;
|
||||
}
|
||||
}
|
||||
surface = SDL_AllocSurface(SDL_SWSURFACE, width, height,
|
||||
bit_depth*info_ptr->channels, Rmask,Gmask,Bmask,Amask);
|
||||
if ( surface == NULL ) {
|
||||
error = "Out of memory";
|
||||
goto done;
|
||||
}
|
||||
|
||||
if(ckey != -1) {
|
||||
if(color_type != PNG_COLOR_TYPE_PALETTE)
|
||||
/* FIXME: Should these be truncated or shifted down? */
|
||||
ckey = SDL_MapRGB(surface->format,
|
||||
(Uint8)transv->red,
|
||||
(Uint8)transv->green,
|
||||
(Uint8)transv->blue);
|
||||
SDL_SetColorKey(surface, SDL_SRCCOLORKEY, ckey);
|
||||
}
|
||||
|
||||
/* Create the array of pointers to image data */
|
||||
row_pointers = (png_bytep*) malloc(sizeof(png_bytep)*height);
|
||||
if ( (row_pointers == NULL) ) {
|
||||
error = "Out of memory";
|
||||
goto done;
|
||||
}
|
||||
for (row = 0; row < (int)height; row++) {
|
||||
row_pointers[row] = (png_bytep)
|
||||
(Uint8 *)surface->pixels + row*surface->pitch;
|
||||
}
|
||||
|
||||
/* Read the entire image in one go */
|
||||
lib.png_read_image(png_ptr, row_pointers);
|
||||
|
||||
/* and we're done! (png_read_end() can be omitted if no processing of
|
||||
* post-IDAT text/time/etc. is desired)
|
||||
* In some cases it can't read PNG's created by some popular programs (ACDSEE),
|
||||
* we do not want to process comments, so we omit png_read_end
|
||||
|
||||
lib.png_read_end(png_ptr, info_ptr);
|
||||
*/
|
||||
|
||||
/* Load the palette, if any */
|
||||
palette = surface->format->palette;
|
||||
if ( palette ) {
|
||||
if(color_type == PNG_COLOR_TYPE_GRAY) {
|
||||
palette->ncolors = 256;
|
||||
for(i = 0; i < 256; i++) {
|
||||
palette->colors[i].r = i;
|
||||
palette->colors[i].g = i;
|
||||
palette->colors[i].b = i;
|
||||
}
|
||||
} else if (info_ptr->num_palette > 0 ) {
|
||||
palette->ncolors = info_ptr->num_palette;
|
||||
for( i=0; i<info_ptr->num_palette; ++i ) {
|
||||
palette->colors[i].b = info_ptr->palette[i].blue;
|
||||
palette->colors[i].g = info_ptr->palette[i].green;
|
||||
palette->colors[i].r = info_ptr->palette[i].red;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
done: /* Clean up and return */
|
||||
if ( png_ptr ) {
|
||||
lib.png_destroy_read_struct(&png_ptr,
|
||||
info_ptr ? &info_ptr : (png_infopp)0,
|
||||
(png_infopp)0);
|
||||
}
|
||||
if ( row_pointers ) {
|
||||
free(row_pointers);
|
||||
}
|
||||
if ( error ) {
|
||||
SDL_RWseek(src, start, SEEK_SET);
|
||||
if ( surface ) {
|
||||
SDL_FreeSurface(surface);
|
||||
surface = NULL;
|
||||
}
|
||||
IMG_QuitPNG();
|
||||
//IMG_SetError(error);
|
||||
} else {
|
||||
IMG_QuitPNG();
|
||||
}
|
||||
return(surface);
|
||||
}
|
||||
|
||||
/* Load an image from an SDL datasource */
|
||||
SDL_Surface *IMG_Load_RW(SDL_RWops *src, int freesrc)
|
||||
{
|
||||
SDL_Surface* img = IMG_LoadPNG_RW(src);
|
||||
if (freesrc)
|
||||
SDL_RWclose(src);
|
||||
return img;
|
||||
}
|
||||
@@ -0,0 +1,798 @@
|
||||
|
||||
/* png.c - location for general purpose libpng functions
|
||||
*
|
||||
* Last changed in libpng 1.2.21 October 4, 2007
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2007 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.)
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#define PNG_NO_EXTERN
|
||||
#include "png.h"
|
||||
|
||||
/* Generate a compiler error if there is an old png.h in the search path. */
|
||||
typedef version_1_2_25 Your_png_h_is_not_version_1_2_25;
|
||||
|
||||
/* Version information for C files. This had better match the version
|
||||
* string defined in png.h. */
|
||||
|
||||
#ifdef PNG_USE_GLOBAL_ARRAYS
|
||||
/* png_libpng_ver was changed to a function in version 1.0.5c */
|
||||
PNG_CONST char png_libpng_ver[18] = PNG_LIBPNG_VER_STRING;
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
|
||||
/* png_sig was changed to a function in version 1.0.5c */
|
||||
/* Place to hold the signature string for a PNG file. */
|
||||
PNG_CONST png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
|
||||
#endif /* PNG_READ_SUPPORTED */
|
||||
|
||||
/* Invoke global declarations for constant strings for known chunk types */
|
||||
PNG_IHDR;
|
||||
PNG_IDAT;
|
||||
PNG_IEND;
|
||||
PNG_PLTE;
|
||||
PNG_bKGD;
|
||||
PNG_cHRM;
|
||||
PNG_gAMA;
|
||||
PNG_hIST;
|
||||
PNG_iCCP;
|
||||
PNG_iTXt;
|
||||
PNG_oFFs;
|
||||
PNG_pCAL;
|
||||
PNG_sCAL;
|
||||
PNG_pHYs;
|
||||
PNG_sBIT;
|
||||
PNG_sPLT;
|
||||
PNG_sRGB;
|
||||
PNG_tEXt;
|
||||
PNG_tIME;
|
||||
PNG_tRNS;
|
||||
PNG_zTXt;
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
|
||||
|
||||
/* start of interlace block */
|
||||
PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
|
||||
|
||||
/* offset to next interlace block */
|
||||
PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
|
||||
|
||||
/* start of interlace block in the y direction */
|
||||
PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
|
||||
|
||||
/* offset to next interlace block in the y direction */
|
||||
PNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
|
||||
|
||||
/* Height of interlace block. This is not currently used - if you need
|
||||
* it, uncomment it here and in png.h
|
||||
PNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
|
||||
*/
|
||||
|
||||
/* Mask to determine which pixels are valid in a pass */
|
||||
PNG_CONST int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
|
||||
|
||||
/* Mask to determine which pixels to overwrite while displaying */
|
||||
PNG_CONST int FARDATA png_pass_dsp_mask[]
|
||||
= {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
|
||||
|
||||
#endif /* PNG_READ_SUPPORTED */
|
||||
#endif /* PNG_USE_GLOBAL_ARRAYS */
|
||||
|
||||
/* Tells libpng that we have already handled the first "num_bytes" bytes
|
||||
* of the PNG file signature. If the PNG data is embedded into another
|
||||
* stream we can set num_bytes = 8 so that libpng will not attempt to read
|
||||
* or write any of the magic bytes before it starts on the IHDR.
|
||||
*/
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
void PNGAPI
|
||||
png_set_sig_bytes(png_structp png_ptr, int num_bytes)
|
||||
{
|
||||
if(png_ptr == NULL) return;
|
||||
png_debug(1, "in png_set_sig_bytes\n");
|
||||
if (num_bytes > 8)
|
||||
png_error(png_ptr, "Too many bytes for PNG signature.");
|
||||
|
||||
png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes);
|
||||
}
|
||||
|
||||
/* Checks whether the supplied bytes match the PNG signature. We allow
|
||||
* checking less than the full 8-byte signature so that those apps that
|
||||
* already read the first few bytes of a file to determine the file type
|
||||
* can simply check the remaining bytes for extra assurance. Returns
|
||||
* an integer less than, equal to, or greater than zero if sig is found,
|
||||
* respectively, to be less than, to match, or be greater than the correct
|
||||
* PNG signature (this is the same behaviour as strcmp, memcmp, etc).
|
||||
*/
|
||||
int PNGAPI
|
||||
png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
|
||||
{
|
||||
png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
|
||||
if (num_to_check > 8)
|
||||
num_to_check = 8;
|
||||
else if (num_to_check < 1)
|
||||
return (-1);
|
||||
|
||||
if (start > 7)
|
||||
return (-1);
|
||||
|
||||
if (start + num_to_check > 8)
|
||||
num_to_check = 8 - start;
|
||||
|
||||
return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check)));
|
||||
}
|
||||
|
||||
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
|
||||
/* (Obsolete) function to check signature bytes. It does not allow one
|
||||
* to check a partial signature. This function might be removed in the
|
||||
* future - use png_sig_cmp(). Returns true (nonzero) if the file is PNG.
|
||||
*/
|
||||
int PNGAPI
|
||||
png_check_sig(png_bytep sig, int num)
|
||||
{
|
||||
return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num));
|
||||
}
|
||||
#endif
|
||||
#endif /* PNG_READ_SUPPORTED */
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
/* Function to allocate memory for zlib and clear it to 0. */
|
||||
#ifdef PNG_1_0_X
|
||||
voidpf PNGAPI
|
||||
#else
|
||||
voidpf /* private */
|
||||
#endif
|
||||
png_zalloc(voidpf png_ptr, uInt items, uInt size)
|
||||
{
|
||||
png_voidp ptr;
|
||||
png_structp p=(png_structp)png_ptr;
|
||||
png_uint_32 save_flags=p->flags;
|
||||
png_uint_32 num_bytes;
|
||||
|
||||
if(png_ptr == NULL) return (NULL);
|
||||
if (items > PNG_UINT_32_MAX/size)
|
||||
{
|
||||
png_warning (p, "Potential overflow in png_zalloc()");
|
||||
return (NULL);
|
||||
}
|
||||
num_bytes = (png_uint_32)items * size;
|
||||
|
||||
p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
|
||||
ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes);
|
||||
p->flags=save_flags;
|
||||
|
||||
#if defined(PNG_1_0_X) && !defined(PNG_NO_ZALLOC_ZERO)
|
||||
if (ptr == NULL)
|
||||
return ((voidpf)ptr);
|
||||
|
||||
if (num_bytes > (png_uint_32)0x8000L)
|
||||
{
|
||||
png_memset(ptr, 0, (png_size_t)0x8000L);
|
||||
png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0,
|
||||
(png_size_t)(num_bytes - (png_uint_32)0x8000L));
|
||||
}
|
||||
else
|
||||
{
|
||||
png_memset(ptr, 0, (png_size_t)num_bytes);
|
||||
}
|
||||
#endif
|
||||
return ((voidpf)ptr);
|
||||
}
|
||||
|
||||
/* function to free memory for zlib */
|
||||
#ifdef PNG_1_0_X
|
||||
void PNGAPI
|
||||
#else
|
||||
void /* private */
|
||||
#endif
|
||||
png_zfree(voidpf png_ptr, voidpf ptr)
|
||||
{
|
||||
png_free((png_structp)png_ptr, (png_voidp)ptr);
|
||||
}
|
||||
|
||||
/* Reset the CRC variable to 32 bits of 1's. Care must be taken
|
||||
* in case CRC is > 32 bits to leave the top bits 0.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_reset_crc(png_structp png_ptr)
|
||||
{
|
||||
png_ptr->crc = crc32(0, Z_NULL, 0);
|
||||
}
|
||||
|
||||
/* Calculate the CRC over a section of data. We can only pass as
|
||||
* much data to this routine as the largest single buffer size. We
|
||||
* also check that this data will actually be used before going to the
|
||||
* trouble of calculating it.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length)
|
||||
{
|
||||
int need_crc = 1;
|
||||
|
||||
if (png_ptr->chunk_name[0] & 0x20) /* ancillary */
|
||||
{
|
||||
if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
|
||||
(PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
|
||||
need_crc = 0;
|
||||
}
|
||||
else /* critical */
|
||||
{
|
||||
if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
|
||||
need_crc = 0;
|
||||
}
|
||||
|
||||
if (need_crc)
|
||||
png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length);
|
||||
}
|
||||
|
||||
/* Allocate the memory for an info_struct for the application. We don't
|
||||
* really need the png_ptr, but it could potentially be useful in the
|
||||
* future. This should be used in favour of malloc(png_sizeof(png_info))
|
||||
* and png_info_init() so that applications that want to use a shared
|
||||
* libpng don't have to be recompiled if png_info changes size.
|
||||
*/
|
||||
png_infop PNGAPI
|
||||
png_create_info_struct(png_structp png_ptr)
|
||||
{
|
||||
png_infop info_ptr;
|
||||
|
||||
png_debug(1, "in png_create_info_struct\n");
|
||||
if(png_ptr == NULL) return (NULL);
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
|
||||
png_ptr->malloc_fn, png_ptr->mem_ptr);
|
||||
#else
|
||||
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
|
||||
#endif
|
||||
if (info_ptr != NULL)
|
||||
png_info_init_3(&info_ptr, png_sizeof(png_info));
|
||||
|
||||
return (info_ptr);
|
||||
}
|
||||
|
||||
/* This function frees the memory associated with a single info struct.
|
||||
* Normally, one would use either png_destroy_read_struct() or
|
||||
* png_destroy_write_struct() to free an info struct, but this may be
|
||||
* useful for some applications.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
|
||||
{
|
||||
png_infop info_ptr = NULL;
|
||||
if(png_ptr == NULL) return;
|
||||
|
||||
png_debug(1, "in png_destroy_info_struct\n");
|
||||
if (info_ptr_ptr != NULL)
|
||||
info_ptr = *info_ptr_ptr;
|
||||
|
||||
if (info_ptr != NULL)
|
||||
{
|
||||
png_info_destroy(png_ptr, info_ptr);
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn,
|
||||
png_ptr->mem_ptr);
|
||||
#else
|
||||
png_destroy_struct((png_voidp)info_ptr);
|
||||
#endif
|
||||
*info_ptr_ptr = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/* Initialize the info structure. This is now an internal function (0.89)
|
||||
* and applications using it are urged to use png_create_info_struct()
|
||||
* instead.
|
||||
*/
|
||||
#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
|
||||
#undef png_info_init
|
||||
void PNGAPI
|
||||
png_info_init(png_infop info_ptr)
|
||||
{
|
||||
/* We only come here via pre-1.0.12-compiled applications */
|
||||
png_info_init_3(&info_ptr, 0);
|
||||
}
|
||||
#endif
|
||||
|
||||
void PNGAPI
|
||||
png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
|
||||
{
|
||||
png_infop info_ptr = *ptr_ptr;
|
||||
|
||||
if(info_ptr == NULL) return;
|
||||
|
||||
png_debug(1, "in png_info_init_3\n");
|
||||
|
||||
if(png_sizeof(png_info) > png_info_struct_size)
|
||||
{
|
||||
png_destroy_struct(info_ptr);
|
||||
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
|
||||
*ptr_ptr = info_ptr;
|
||||
}
|
||||
|
||||
/* set everything to 0 */
|
||||
png_memset(info_ptr, 0, png_sizeof (png_info));
|
||||
}
|
||||
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
void PNGAPI
|
||||
png_data_freer(png_structp png_ptr, png_infop info_ptr,
|
||||
int freer, png_uint_32 mask)
|
||||
{
|
||||
png_debug(1, "in png_data_freer\n");
|
||||
if (png_ptr == NULL || info_ptr == NULL)
|
||||
return;
|
||||
if(freer == PNG_DESTROY_WILL_FREE_DATA)
|
||||
info_ptr->free_me |= mask;
|
||||
else if(freer == PNG_USER_WILL_FREE_DATA)
|
||||
info_ptr->free_me &= ~mask;
|
||||
else
|
||||
png_warning(png_ptr,
|
||||
"Unknown freer parameter in png_data_freer.");
|
||||
}
|
||||
#endif
|
||||
|
||||
void PNGAPI
|
||||
png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
|
||||
int num)
|
||||
{
|
||||
png_debug(1, "in png_free_data\n");
|
||||
if (png_ptr == NULL || info_ptr == NULL)
|
||||
return;
|
||||
|
||||
#if defined(PNG_TEXT_SUPPORTED)
|
||||
/* free text item num or (if num == -1) all text items */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_TEXT)
|
||||
#endif
|
||||
{
|
||||
if (num != -1)
|
||||
{
|
||||
if (info_ptr->text && info_ptr->text[num].key)
|
||||
{
|
||||
png_free(png_ptr, info_ptr->text[num].key);
|
||||
info_ptr->text[num].key = NULL;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < info_ptr->num_text; i++)
|
||||
png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
|
||||
png_free(png_ptr, info_ptr->text);
|
||||
info_ptr->text = NULL;
|
||||
info_ptr->num_text=0;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_tRNS_SUPPORTED)
|
||||
/* free any tRNS entry */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
|
||||
#else
|
||||
if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS))
|
||||
#endif
|
||||
{
|
||||
png_free(png_ptr, info_ptr->trans);
|
||||
info_ptr->valid &= ~PNG_INFO_tRNS;
|
||||
#ifndef PNG_FREE_ME_SUPPORTED
|
||||
png_ptr->flags &= ~PNG_FLAG_FREE_TRNS;
|
||||
#endif
|
||||
info_ptr->trans = NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_sCAL_SUPPORTED)
|
||||
/* free any sCAL entry */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_SCAL)
|
||||
#endif
|
||||
{
|
||||
#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
|
||||
png_free(png_ptr, info_ptr->scal_s_width);
|
||||
png_free(png_ptr, info_ptr->scal_s_height);
|
||||
info_ptr->scal_s_width = NULL;
|
||||
info_ptr->scal_s_height = NULL;
|
||||
#endif
|
||||
info_ptr->valid &= ~PNG_INFO_sCAL;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_pCAL_SUPPORTED)
|
||||
/* free any pCAL entry */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_PCAL)
|
||||
#endif
|
||||
{
|
||||
png_free(png_ptr, info_ptr->pcal_purpose);
|
||||
png_free(png_ptr, info_ptr->pcal_units);
|
||||
info_ptr->pcal_purpose = NULL;
|
||||
info_ptr->pcal_units = NULL;
|
||||
if (info_ptr->pcal_params != NULL)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
|
||||
{
|
||||
png_free(png_ptr, info_ptr->pcal_params[i]);
|
||||
info_ptr->pcal_params[i]=NULL;
|
||||
}
|
||||
png_free(png_ptr, info_ptr->pcal_params);
|
||||
info_ptr->pcal_params = NULL;
|
||||
}
|
||||
info_ptr->valid &= ~PNG_INFO_pCAL;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_iCCP_SUPPORTED)
|
||||
/* free any iCCP entry */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_ICCP)
|
||||
#endif
|
||||
{
|
||||
png_free(png_ptr, info_ptr->iccp_name);
|
||||
png_free(png_ptr, info_ptr->iccp_profile);
|
||||
info_ptr->iccp_name = NULL;
|
||||
info_ptr->iccp_profile = NULL;
|
||||
info_ptr->valid &= ~PNG_INFO_iCCP;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_sPLT_SUPPORTED)
|
||||
/* free a given sPLT entry, or (if num == -1) all sPLT entries */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_SPLT)
|
||||
#endif
|
||||
{
|
||||
if (num != -1)
|
||||
{
|
||||
if(info_ptr->splt_palettes)
|
||||
{
|
||||
png_free(png_ptr, info_ptr->splt_palettes[num].name);
|
||||
png_free(png_ptr, info_ptr->splt_palettes[num].entries);
|
||||
info_ptr->splt_palettes[num].name = NULL;
|
||||
info_ptr->splt_palettes[num].entries = NULL;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if(info_ptr->splt_palettes_num)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
|
||||
png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
|
||||
|
||||
png_free(png_ptr, info_ptr->splt_palettes);
|
||||
info_ptr->splt_palettes = NULL;
|
||||
info_ptr->splt_palettes_num = 0;
|
||||
}
|
||||
info_ptr->valid &= ~PNG_INFO_sPLT;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
||||
if(png_ptr->unknown_chunk.data)
|
||||
{
|
||||
png_free(png_ptr, png_ptr->unknown_chunk.data);
|
||||
png_ptr->unknown_chunk.data = NULL;
|
||||
}
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_UNKN)
|
||||
#endif
|
||||
{
|
||||
if (num != -1)
|
||||
{
|
||||
if(info_ptr->unknown_chunks)
|
||||
{
|
||||
png_free(png_ptr, info_ptr->unknown_chunks[num].data);
|
||||
info_ptr->unknown_chunks[num].data = NULL;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
int i;
|
||||
|
||||
if(info_ptr->unknown_chunks_num)
|
||||
{
|
||||
for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
|
||||
png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
|
||||
|
||||
png_free(png_ptr, info_ptr->unknown_chunks);
|
||||
info_ptr->unknown_chunks = NULL;
|
||||
info_ptr->unknown_chunks_num = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_hIST_SUPPORTED)
|
||||
/* free any hIST entry */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_HIST) & info_ptr->free_me)
|
||||
#else
|
||||
if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST))
|
||||
#endif
|
||||
{
|
||||
png_free(png_ptr, info_ptr->hist);
|
||||
info_ptr->hist = NULL;
|
||||
info_ptr->valid &= ~PNG_INFO_hIST;
|
||||
#ifndef PNG_FREE_ME_SUPPORTED
|
||||
png_ptr->flags &= ~PNG_FLAG_FREE_HIST;
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
|
||||
/* free any PLTE entry that was internally allocated */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
|
||||
#else
|
||||
if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE))
|
||||
#endif
|
||||
{
|
||||
png_zfree(png_ptr, info_ptr->palette);
|
||||
info_ptr->palette = NULL;
|
||||
info_ptr->valid &= ~PNG_INFO_PLTE;
|
||||
#ifndef PNG_FREE_ME_SUPPORTED
|
||||
png_ptr->flags &= ~PNG_FLAG_FREE_PLTE;
|
||||
#endif
|
||||
info_ptr->num_palette = 0;
|
||||
}
|
||||
|
||||
#if defined(PNG_INFO_IMAGE_SUPPORTED)
|
||||
/* free any image bits attached to the info structure */
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
|
||||
#else
|
||||
if (mask & PNG_FREE_ROWS)
|
||||
#endif
|
||||
{
|
||||
if(info_ptr->row_pointers)
|
||||
{
|
||||
int row;
|
||||
for (row = 0; row < (int)info_ptr->height; row++)
|
||||
{
|
||||
png_free(png_ptr, info_ptr->row_pointers[row]);
|
||||
info_ptr->row_pointers[row]=NULL;
|
||||
}
|
||||
png_free(png_ptr, info_ptr->row_pointers);
|
||||
info_ptr->row_pointers=NULL;
|
||||
}
|
||||
info_ptr->valid &= ~PNG_INFO_IDAT;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_FREE_ME_SUPPORTED
|
||||
if(num == -1)
|
||||
info_ptr->free_me &= ~mask;
|
||||
else
|
||||
info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
|
||||
#endif
|
||||
}
|
||||
|
||||
/* This is an internal routine to free any memory that the info struct is
|
||||
* pointing to before re-using it or freeing the struct itself. Recall
|
||||
* that png_free() checks for NULL pointers for us.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_info_destroy(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
png_debug(1, "in png_info_destroy\n");
|
||||
|
||||
png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
|
||||
|
||||
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
||||
if (png_ptr->num_chunk_list)
|
||||
{
|
||||
png_free(png_ptr, png_ptr->chunk_list);
|
||||
png_ptr->chunk_list=NULL;
|
||||
png_ptr->num_chunk_list=0;
|
||||
}
|
||||
#endif
|
||||
|
||||
png_info_init_3(&info_ptr, png_sizeof(png_info));
|
||||
}
|
||||
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
|
||||
|
||||
/* This function returns a pointer to the io_ptr associated with the user
|
||||
* functions. The application should free any memory associated with this
|
||||
* pointer before png_write_destroy() or png_read_destroy() are called.
|
||||
*/
|
||||
png_voidp PNGAPI
|
||||
png_get_io_ptr(png_structp png_ptr)
|
||||
{
|
||||
if(png_ptr == NULL) return (NULL);
|
||||
return (png_ptr->io_ptr);
|
||||
}
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
/* Initialize the default input/output functions for the PNG file. If you
|
||||
* use your own read or write routines, you can call either png_set_read_fn()
|
||||
* or png_set_write_fn() instead of png_init_io(). If you have defined
|
||||
* PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't
|
||||
* necessarily available.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_init_io(png_structp png_ptr, png_FILE_p fp)
|
||||
{
|
||||
png_debug(1, "in png_init_io\n");
|
||||
if(png_ptr == NULL) return;
|
||||
png_ptr->io_ptr = (png_voidp)fp;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_TIME_RFC1123_SUPPORTED)
|
||||
/* Convert the supplied time into an RFC 1123 string suitable for use in
|
||||
* a "Creation Time" or other text-based time string.
|
||||
*/
|
||||
png_charp PNGAPI
|
||||
png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
|
||||
{
|
||||
static PNG_CONST char short_months[12][4] =
|
||||
{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
|
||||
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
|
||||
|
||||
if(png_ptr == NULL) return (NULL);
|
||||
if (png_ptr->time_buffer == NULL)
|
||||
{
|
||||
png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
|
||||
png_sizeof(char)));
|
||||
}
|
||||
|
||||
#if defined(_WIN32_WCE)
|
||||
{
|
||||
wchar_t time_buf[29];
|
||||
wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"),
|
||||
ptime->day % 32, short_months[(ptime->month - 1) % 12],
|
||||
ptime->year, ptime->hour % 24, ptime->minute % 60,
|
||||
ptime->second % 61);
|
||||
WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29,
|
||||
NULL, NULL);
|
||||
}
|
||||
#else
|
||||
#ifdef USE_FAR_KEYWORD
|
||||
{
|
||||
char near_time_buf[29];
|
||||
png_snprintf6(near_time_buf,29,"%d %s %d %02d:%02d:%02d +0000",
|
||||
ptime->day % 32, short_months[(ptime->month - 1) % 12],
|
||||
ptime->year, ptime->hour % 24, ptime->minute % 60,
|
||||
ptime->second % 61);
|
||||
png_memcpy(png_ptr->time_buffer, near_time_buf,
|
||||
29*png_sizeof(char));
|
||||
}
|
||||
#else
|
||||
png_snprintf6(png_ptr->time_buffer,29,"%d %s %d %02d:%02d:%02d +0000",
|
||||
ptime->day % 32, short_months[(ptime->month - 1) % 12],
|
||||
ptime->year, ptime->hour % 24, ptime->minute % 60,
|
||||
ptime->second % 61);
|
||||
#endif
|
||||
#endif /* _WIN32_WCE */
|
||||
return ((png_charp)png_ptr->time_buffer);
|
||||
}
|
||||
#endif /* PNG_TIME_RFC1123_SUPPORTED */
|
||||
|
||||
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
|
||||
|
||||
png_charp PNGAPI
|
||||
png_get_copyright(png_structp png_ptr)
|
||||
{
|
||||
png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */
|
||||
return ((png_charp) "\n libpng version 1.2.25 - February 18, 2008\n\
|
||||
Copyright (c) 1998-2008 Glenn Randers-Pehrson\n\
|
||||
Copyright (c) 1996-1997 Andreas Dilger\n\
|
||||
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
|
||||
}
|
||||
|
||||
/* The following return the library version as a short string in the
|
||||
* format 1.0.0 through 99.99.99zz. To get the version of *.h files
|
||||
* used with your application, print out PNG_LIBPNG_VER_STRING, which
|
||||
* is defined in png.h.
|
||||
* Note: now there is no difference between png_get_libpng_ver() and
|
||||
* png_get_header_ver(). Due to the version_nn_nn_nn typedef guard,
|
||||
* it is guaranteed that png.c uses the correct version of png.h.
|
||||
*/
|
||||
png_charp PNGAPI
|
||||
png_get_libpng_ver(png_structp png_ptr)
|
||||
{
|
||||
/* Version of *.c files used when building libpng */
|
||||
png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */
|
||||
return ((png_charp) PNG_LIBPNG_VER_STRING);
|
||||
}
|
||||
|
||||
png_charp PNGAPI
|
||||
png_get_header_ver(png_structp png_ptr)
|
||||
{
|
||||
/* Version of *.h files used when building libpng */
|
||||
png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */
|
||||
return ((png_charp) PNG_LIBPNG_VER_STRING);
|
||||
}
|
||||
|
||||
png_charp PNGAPI
|
||||
png_get_header_version(png_structp png_ptr)
|
||||
{
|
||||
/* Returns longer string containing both version and date */
|
||||
png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */
|
||||
return ((png_charp) PNG_HEADER_VERSION_STRING
|
||||
#ifndef PNG_READ_SUPPORTED
|
||||
" (NO READ SUPPORT)"
|
||||
#endif
|
||||
"\n");
|
||||
}
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
|
||||
int PNGAPI
|
||||
png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
|
||||
{
|
||||
/* check chunk_name and return "keep" value if it's on the list, else 0 */
|
||||
int i;
|
||||
png_bytep p;
|
||||
if(png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0)
|
||||
return 0;
|
||||
p=png_ptr->chunk_list+png_ptr->num_chunk_list*5-5;
|
||||
for (i = png_ptr->num_chunk_list; i; i--, p-=5)
|
||||
if (!png_memcmp(chunk_name, p, 4))
|
||||
return ((int)*(p+4));
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* This function, added to libpng-1.0.6g, is untested. */
|
||||
int PNGAPI
|
||||
png_reset_zstream(png_structp png_ptr)
|
||||
{
|
||||
if (png_ptr == NULL) return Z_STREAM_ERROR;
|
||||
return (inflateReset(&png_ptr->zstream));
|
||||
}
|
||||
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
|
||||
|
||||
/* This function was added to libpng-1.0.7 */
|
||||
png_uint_32 PNGAPI
|
||||
png_access_version_number(void)
|
||||
{
|
||||
/* Version of *.c files used when building libpng */
|
||||
return((png_uint_32) PNG_LIBPNG_VER);
|
||||
}
|
||||
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) && defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
||||
#if !defined(PNG_1_0_X)
|
||||
/* this function was added to libpng 1.2.0 */
|
||||
int PNGAPI
|
||||
png_mmx_support(void)
|
||||
{
|
||||
/* obsolete, to be removed from libpng-1.4.0 */
|
||||
return -1;
|
||||
}
|
||||
#endif /* PNG_1_0_X */
|
||||
#endif /* PNG_READ_SUPPORTED && PNG_ASSEMBLER_CODE_SUPPORTED */
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
#ifdef PNG_SIZE_T
|
||||
/* Added at libpng version 1.2.6 */
|
||||
PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
|
||||
png_size_t PNGAPI
|
||||
png_convert_size(size_t size)
|
||||
{
|
||||
if (size > (png_size_t)-1)
|
||||
PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */
|
||||
return ((png_size_t)size);
|
||||
}
|
||||
#endif /* PNG_SIZE_T */
|
||||
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
|
||||
@@ -0,0 +1,343 @@
|
||||
|
||||
/* pngerror.c - stub functions for i/o and memory allocation
|
||||
*
|
||||
* Last changed in libpng 1.2.22 [October 13, 2007]
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2007 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.)
|
||||
*
|
||||
* This file provides a location for all error handling. Users who
|
||||
* need special error handling are expected to write replacement functions
|
||||
* and use png_set_error_fn() to use those functions. See the instructions
|
||||
* at each function.
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
static void /* PRIVATE */
|
||||
png_default_error PNGARG((png_structp png_ptr,
|
||||
png_const_charp error_message));
|
||||
#ifndef PNG_NO_WARNINGS
|
||||
static void /* PRIVATE */
|
||||
png_default_warning PNGARG((png_structp png_ptr,
|
||||
png_const_charp warning_message));
|
||||
#endif /* PNG_NO_WARNINGS */
|
||||
|
||||
/* This function is called whenever there is a fatal error. This function
|
||||
* should not be changed. If there is a need to handle errors differently,
|
||||
* you should supply a replacement error function and use png_set_error_fn()
|
||||
* to replace the error function at run-time.
|
||||
*/
|
||||
#ifndef PNG_NO_ERROR_TEXT
|
||||
void PNGAPI
|
||||
png_error(png_structp png_ptr, png_const_charp error_message)
|
||||
{
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
char msg[16];
|
||||
if (png_ptr != NULL)
|
||||
{
|
||||
if (png_ptr->flags&
|
||||
(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
|
||||
{
|
||||
if (*error_message == '#')
|
||||
{
|
||||
int offset;
|
||||
for (offset=1; offset<15; offset++)
|
||||
if (*(error_message+offset) == ' ')
|
||||
break;
|
||||
if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
|
||||
{
|
||||
int i;
|
||||
for (i=0; i<offset-1; i++)
|
||||
msg[i]=error_message[i+1];
|
||||
msg[i]='\0';
|
||||
error_message=msg;
|
||||
}
|
||||
else
|
||||
error_message+=offset;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
|
||||
{
|
||||
msg[0]='0';
|
||||
msg[1]='\0';
|
||||
error_message=msg;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
if (png_ptr != NULL && png_ptr->error_fn != NULL)
|
||||
(*(png_ptr->error_fn))(png_ptr, error_message);
|
||||
|
||||
/* If the custom handler doesn't exist, or if it returns,
|
||||
use the default handler, which will not return. */
|
||||
png_default_error(png_ptr, error_message);
|
||||
}
|
||||
#else
|
||||
void PNGAPI
|
||||
png_err(png_structp png_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && png_ptr->error_fn != NULL)
|
||||
(*(png_ptr->error_fn))(png_ptr, '\0');
|
||||
|
||||
/* If the custom handler doesn't exist, or if it returns,
|
||||
use the default handler, which will not return. */
|
||||
png_default_error(png_ptr, '\0');
|
||||
}
|
||||
#endif /* PNG_NO_ERROR_TEXT */
|
||||
|
||||
#ifndef PNG_NO_WARNINGS
|
||||
/* This function is called whenever there is a non-fatal error. This function
|
||||
* should not be changed. If there is a need to handle warnings differently,
|
||||
* you should supply a replacement warning function and use
|
||||
* png_set_error_fn() to replace the warning function at run-time.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_warning(png_structp png_ptr, png_const_charp warning_message)
|
||||
{
|
||||
int offset = 0;
|
||||
if (png_ptr != NULL)
|
||||
{
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
if (png_ptr->flags&
|
||||
(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
|
||||
#endif
|
||||
{
|
||||
if (*warning_message == '#')
|
||||
{
|
||||
for (offset=1; offset<15; offset++)
|
||||
if (*(warning_message+offset) == ' ')
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (png_ptr != NULL && png_ptr->warning_fn != NULL)
|
||||
(*(png_ptr->warning_fn))(png_ptr, warning_message+offset);
|
||||
}
|
||||
else
|
||||
png_default_warning(png_ptr, warning_message+offset);
|
||||
}
|
||||
#endif /* PNG_NO_WARNINGS */
|
||||
|
||||
|
||||
/* These utilities are used internally to build an error message that relates
|
||||
* to the current chunk. The chunk name comes from png_ptr->chunk_name,
|
||||
* this is used to prefix the message. The message is limited in length
|
||||
* to 63 bytes, the name characters are output as hex digits wrapped in []
|
||||
* if the character is invalid.
|
||||
*/
|
||||
#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
|
||||
static PNG_CONST char png_digit[16] = {
|
||||
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
|
||||
'A', 'B', 'C', 'D', 'E', 'F'
|
||||
};
|
||||
|
||||
#define PNG_MAX_ERROR_TEXT 64
|
||||
|
||||
#if !defined(PNG_NO_WARNINGS) || !defined(PNG_NO_ERROR_TEXT)
|
||||
static void /* PRIVATE */
|
||||
png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
|
||||
error_message)
|
||||
{
|
||||
int iout = 0, iin = 0;
|
||||
|
||||
while (iin < 4)
|
||||
{
|
||||
int c = png_ptr->chunk_name[iin++];
|
||||
if (isnonalpha(c))
|
||||
{
|
||||
buffer[iout++] = '[';
|
||||
buffer[iout++] = png_digit[(c & 0xf0) >> 4];
|
||||
buffer[iout++] = png_digit[c & 0x0f];
|
||||
buffer[iout++] = ']';
|
||||
}
|
||||
else
|
||||
{
|
||||
buffer[iout++] = (png_byte)c;
|
||||
}
|
||||
}
|
||||
|
||||
if (error_message == NULL)
|
||||
buffer[iout] = '\0';
|
||||
else
|
||||
{
|
||||
buffer[iout++] = ':';
|
||||
buffer[iout++] = ' ';
|
||||
png_memcpy(buffer+iout, error_message, PNG_MAX_ERROR_TEXT);
|
||||
buffer[iout+PNG_MAX_ERROR_TEXT-1] = '\0';
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
void PNGAPI
|
||||
png_chunk_error(png_structp png_ptr, png_const_charp error_message)
|
||||
{
|
||||
char msg[18+PNG_MAX_ERROR_TEXT];
|
||||
if (png_ptr == NULL)
|
||||
png_error(png_ptr, error_message);
|
||||
else
|
||||
{
|
||||
png_format_buffer(png_ptr, msg, error_message);
|
||||
png_error(png_ptr, msg);
|
||||
}
|
||||
}
|
||||
#endif /* PNG_READ_SUPPORTED */
|
||||
#endif /* !defined(PNG_NO_WARNINGS) || !defined(PNG_NO_ERROR_TEXT) */
|
||||
|
||||
#ifndef PNG_NO_WARNINGS
|
||||
void PNGAPI
|
||||
png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
|
||||
{
|
||||
char msg[18+PNG_MAX_ERROR_TEXT];
|
||||
if (png_ptr == NULL)
|
||||
png_warning(png_ptr, warning_message);
|
||||
else
|
||||
{
|
||||
png_format_buffer(png_ptr, msg, warning_message);
|
||||
png_warning(png_ptr, msg);
|
||||
}
|
||||
}
|
||||
#endif /* PNG_NO_WARNINGS */
|
||||
|
||||
|
||||
/* This is the default error handling function. Note that replacements for
|
||||
* this function MUST NOT RETURN, or the program will likely crash. This
|
||||
* function is used by default, or if the program supplies NULL for the
|
||||
* error function pointer in png_set_error_fn().
|
||||
*/
|
||||
static void /* PRIVATE */
|
||||
png_default_error(png_structp png_ptr, png_const_charp error_message)
|
||||
{
|
||||
#ifndef PNG_NO_CONSOLE_IO
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
if (*error_message == '#')
|
||||
{
|
||||
int offset;
|
||||
char error_number[16];
|
||||
for (offset=0; offset<15; offset++)
|
||||
{
|
||||
error_number[offset] = *(error_message+offset+1);
|
||||
if (*(error_message+offset) == ' ')
|
||||
break;
|
||||
}
|
||||
if((offset > 1) && (offset < 15))
|
||||
{
|
||||
error_number[offset-1]='\0';
|
||||
fprintf(stderr, "libpng error no. %s: %s\n", error_number,
|
||||
error_message+offset);
|
||||
}
|
||||
else
|
||||
fprintf(stderr, "libpng error: %s, offset=%d\n", error_message,offset);
|
||||
}
|
||||
else
|
||||
#endif
|
||||
fprintf(stderr, "libpng error: %s\n", error_message);
|
||||
#endif
|
||||
|
||||
#ifdef PNG_SETJMP_SUPPORTED
|
||||
if (png_ptr)
|
||||
{
|
||||
# ifdef USE_FAR_KEYWORD
|
||||
{
|
||||
jmp_buf jmpbuf;
|
||||
png_memcpy(jmpbuf, png_ptr->jmpbuf, png_sizeof(jmp_buf));
|
||||
longjmp(jmpbuf, 1);
|
||||
}
|
||||
# else
|
||||
longjmp(png_ptr->jmpbuf, 1);
|
||||
# endif
|
||||
}
|
||||
#else
|
||||
PNG_ABORT();
|
||||
#endif
|
||||
#ifdef PNG_NO_CONSOLE_IO
|
||||
error_message = error_message; /* make compiler happy */
|
||||
#endif
|
||||
}
|
||||
|
||||
#ifndef PNG_NO_WARNINGS
|
||||
/* This function is called when there is a warning, but the library thinks
|
||||
* it can continue anyway. Replacement functions don't have to do anything
|
||||
* here if you don't want them to. In the default configuration, png_ptr is
|
||||
* not used, but it is passed in case it may be useful.
|
||||
*/
|
||||
static void /* PRIVATE */
|
||||
png_default_warning(png_structp png_ptr, png_const_charp warning_message)
|
||||
{
|
||||
#ifndef PNG_NO_CONSOLE_IO
|
||||
# ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
if (*warning_message == '#')
|
||||
{
|
||||
int offset;
|
||||
char warning_number[16];
|
||||
for (offset=0; offset<15; offset++)
|
||||
{
|
||||
warning_number[offset]=*(warning_message+offset+1);
|
||||
if (*(warning_message+offset) == ' ')
|
||||
break;
|
||||
}
|
||||
if((offset > 1) && (offset < 15))
|
||||
{
|
||||
warning_number[offset-1]='\0';
|
||||
fprintf(stderr, "libpng warning no. %s: %s\n", warning_number,
|
||||
warning_message+offset);
|
||||
}
|
||||
else
|
||||
fprintf(stderr, "libpng warning: %s\n", warning_message);
|
||||
}
|
||||
else
|
||||
# endif
|
||||
fprintf(stderr, "libpng warning: %s\n", warning_message);
|
||||
#else
|
||||
warning_message = warning_message; /* make compiler happy */
|
||||
#endif
|
||||
png_ptr = png_ptr; /* make compiler happy */
|
||||
}
|
||||
#endif /* PNG_NO_WARNINGS */
|
||||
|
||||
/* This function is called when the application wants to use another method
|
||||
* of handling errors and warnings. Note that the error function MUST NOT
|
||||
* return to the calling routine or serious problems will occur. The return
|
||||
* method used in the default routine calls longjmp(png_ptr->jmpbuf, 1)
|
||||
*/
|
||||
void PNGAPI
|
||||
png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
|
||||
png_error_ptr error_fn, png_error_ptr warning_fn)
|
||||
{
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
png_ptr->error_ptr = error_ptr;
|
||||
png_ptr->error_fn = error_fn;
|
||||
png_ptr->warning_fn = warning_fn;
|
||||
}
|
||||
|
||||
|
||||
/* This function returns a pointer to the error_ptr associated with the user
|
||||
* functions. The application should free any memory associated with this
|
||||
* pointer before png_write_destroy and png_read_destroy are called.
|
||||
*/
|
||||
png_voidp PNGAPI
|
||||
png_get_error_ptr(png_structp png_ptr)
|
||||
{
|
||||
if (png_ptr == NULL)
|
||||
return NULL;
|
||||
return ((png_voidp)png_ptr->error_ptr);
|
||||
}
|
||||
|
||||
|
||||
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
|
||||
void PNGAPI
|
||||
png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
|
||||
{
|
||||
if(png_ptr != NULL)
|
||||
{
|
||||
png_ptr->flags &=
|
||||
((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
|
||||
@@ -0,0 +1,101 @@
|
||||
/* pnggccrd.c was removed from libpng-1.2.20. */
|
||||
|
||||
/* This code snippet is for use by configure's compilation test. */
|
||||
|
||||
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && \
|
||||
defined(PNG_MMX_CODE_SUPPORTED)
|
||||
int PNGAPI png_dummy_mmx_support(void);
|
||||
|
||||
static int _mmx_supported = 2; // 0: no MMX; 1: MMX supported; 2: not tested
|
||||
|
||||
int PNGAPI
|
||||
png_dummy_mmx_support(void) __attribute__((noinline));
|
||||
|
||||
int PNGAPI
|
||||
png_dummy_mmx_support(void)
|
||||
{
|
||||
int result;
|
||||
#if defined(PNG_MMX_CODE_SUPPORTED) // superfluous, but what the heck
|
||||
__asm__ __volatile__ (
|
||||
#if defined(__x86_64__)
|
||||
"pushq %%rbx \n\t" // rbx gets clobbered by CPUID instruction
|
||||
"pushq %%rcx \n\t" // so does rcx...
|
||||
"pushq %%rdx \n\t" // ...and rdx (but rcx & rdx safe on Linux)
|
||||
"pushfq \n\t" // save Eflag to stack
|
||||
"popq %%rax \n\t" // get Eflag from stack into rax
|
||||
"movq %%rax, %%rcx \n\t" // make another copy of Eflag in rcx
|
||||
"xorl $0x200000, %%eax \n\t" // toggle ID bit in Eflag (i.e., bit 21)
|
||||
"pushq %%rax \n\t" // save modified Eflag back to stack
|
||||
"popfq \n\t" // restore modified value to Eflag reg
|
||||
"pushfq \n\t" // save Eflag to stack
|
||||
"popq %%rax \n\t" // get Eflag from stack
|
||||
"pushq %%rcx \n\t" // save original Eflag to stack
|
||||
"popfq \n\t" // restore original Eflag
|
||||
#else
|
||||
"pushl %%ebx \n\t" // ebx gets clobbered by CPUID instruction
|
||||
"pushl %%ecx \n\t" // so does ecx...
|
||||
"pushl %%edx \n\t" // ...and edx (but ecx & edx safe on Linux)
|
||||
"pushfl \n\t" // save Eflag to stack
|
||||
"popl %%eax \n\t" // get Eflag from stack into eax
|
||||
"movl %%eax, %%ecx \n\t" // make another copy of Eflag in ecx
|
||||
"xorl $0x200000, %%eax \n\t" // toggle ID bit in Eflag (i.e., bit 21)
|
||||
"pushl %%eax \n\t" // save modified Eflag back to stack
|
||||
"popfl \n\t" // restore modified value to Eflag reg
|
||||
"pushfl \n\t" // save Eflag to stack
|
||||
"popl %%eax \n\t" // get Eflag from stack
|
||||
"pushl %%ecx \n\t" // save original Eflag to stack
|
||||
"popfl \n\t" // restore original Eflag
|
||||
#endif
|
||||
"xorl %%ecx, %%eax \n\t" // compare new Eflag with original Eflag
|
||||
"jz 0f \n\t" // if same, CPUID instr. is not supported
|
||||
|
||||
"xorl %%eax, %%eax \n\t" // set eax to zero
|
||||
// ".byte 0x0f, 0xa2 \n\t" // CPUID instruction (two-byte opcode)
|
||||
"cpuid \n\t" // get the CPU identification info
|
||||
"cmpl $1, %%eax \n\t" // make sure eax return non-zero value
|
||||
"jl 0f \n\t" // if eax is zero, MMX is not supported
|
||||
|
||||
"xorl %%eax, %%eax \n\t" // set eax to zero and...
|
||||
"incl %%eax \n\t" // ...increment eax to 1. This pair is
|
||||
// faster than the instruction "mov eax, 1"
|
||||
"cpuid \n\t" // get the CPU identification info again
|
||||
"andl $0x800000, %%edx \n\t" // mask out all bits but MMX bit (23)
|
||||
"cmpl $0, %%edx \n\t" // 0 = MMX not supported
|
||||
"jz 0f \n\t" // non-zero = yes, MMX IS supported
|
||||
|
||||
"movl $1, %%eax \n\t" // set return value to 1
|
||||
"jmp 1f \n\t" // DONE: have MMX support
|
||||
|
||||
"0: \n\t" // .NOT_SUPPORTED: target label for jump instructions
|
||||
"movl $0, %%eax \n\t" // set return value to 0
|
||||
"1: \n\t" // .RETURN: target label for jump instructions
|
||||
#if defined(__x86_64__)
|
||||
"popq %%rdx \n\t" // restore rdx
|
||||
"popq %%rcx \n\t" // restore rcx
|
||||
"popq %%rbx \n\t" // restore rbx
|
||||
#else
|
||||
"popl %%edx \n\t" // restore edx
|
||||
"popl %%ecx \n\t" // restore ecx
|
||||
"popl %%ebx \n\t" // restore ebx
|
||||
#endif
|
||||
|
||||
// "ret \n\t" // DONE: no MMX support
|
||||
// (fall through to standard C "ret")
|
||||
|
||||
: "=a" (result) // output list
|
||||
|
||||
: // any variables used on input (none)
|
||||
|
||||
// no clobber list
|
||||
// , "%ebx", "%ecx", "%edx" // GRR: we handle these manually
|
||||
// , "memory" // if write to a variable gcc thought was in a reg
|
||||
// , "cc" // "condition codes" (flag bits)
|
||||
);
|
||||
_mmx_supported = result;
|
||||
#else
|
||||
_mmx_supported = 0;
|
||||
#endif /* PNG_MMX_CODE_SUPPORTED */
|
||||
|
||||
return _mmx_supported;
|
||||
}
|
||||
#endif
|
||||
@@ -0,0 +1,901 @@
|
||||
|
||||
/* pngget.c - retrieval of values from info struct
|
||||
*
|
||||
* Last changed in libpng 1.2.15 January 5, 2007
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2007 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.)
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
return(info_ptr->valid & flag);
|
||||
else
|
||||
return(0);
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
return(info_ptr->rowbytes);
|
||||
else
|
||||
return(0);
|
||||
}
|
||||
|
||||
#if defined(PNG_INFO_IMAGE_SUPPORTED)
|
||||
png_bytepp PNGAPI
|
||||
png_get_rows(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
return(info_ptr->row_pointers);
|
||||
else
|
||||
return(0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_EASY_ACCESS_SUPPORTED
|
||||
/* easy access to info, added in libpng-0.99 */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_image_width(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->width;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_image_height(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->height;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->bit_depth;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_color_type(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->color_type;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->filter_type;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->interlace_type;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
{
|
||||
return info_ptr->compression_type;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_pHYs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter");
|
||||
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
|
||||
return (0);
|
||||
else return (info_ptr->x_pixels_per_unit);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_pHYs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
|
||||
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
|
||||
return (0);
|
||||
else return (info_ptr->y_pixels_per_unit);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_pHYs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
|
||||
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
|
||||
info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
|
||||
return (0);
|
||||
else return (info_ptr->x_pixels_per_unit);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
float PNGAPI
|
||||
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_pHYs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
|
||||
if (info_ptr->x_pixels_per_unit == 0)
|
||||
return ((float)0.0);
|
||||
else
|
||||
return ((float)((float)info_ptr->y_pixels_per_unit
|
||||
/(float)info_ptr->x_pixels_per_unit));
|
||||
}
|
||||
#else
|
||||
return (0.0);
|
||||
#endif
|
||||
return ((float)0.0);
|
||||
}
|
||||
#endif
|
||||
|
||||
png_int_32 PNGAPI
|
||||
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_oFFs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_oFFs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
|
||||
if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
|
||||
return (0);
|
||||
else return (info_ptr->x_offset);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_int_32 PNGAPI
|
||||
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_oFFs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_oFFs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
|
||||
if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
|
||||
return (0);
|
||||
else return (info_ptr->y_offset);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_int_32 PNGAPI
|
||||
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_oFFs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_oFFs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
|
||||
if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
|
||||
return (0);
|
||||
else return (info_ptr->x_offset);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_int_32 PNGAPI
|
||||
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
#if defined(PNG_oFFs_SUPPORTED)
|
||||
if (info_ptr->valid & PNG_INFO_oFFs)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
|
||||
if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
|
||||
return (0);
|
||||
else return (info_ptr->y_offset);
|
||||
}
|
||||
#else
|
||||
return (0);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
|
||||
*.0254 +.5));
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
|
||||
*.0254 +.5));
|
||||
}
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
|
||||
*.0254 +.5));
|
||||
}
|
||||
|
||||
float PNGAPI
|
||||
png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
|
||||
*.00003937);
|
||||
}
|
||||
|
||||
float PNGAPI
|
||||
png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
|
||||
*.00003937);
|
||||
}
|
||||
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
|
||||
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
|
||||
{
|
||||
png_uint_32 retval = 0;
|
||||
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "pHYs");
|
||||
if (res_x != NULL)
|
||||
{
|
||||
*res_x = info_ptr->x_pixels_per_unit;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
}
|
||||
if (res_y != NULL)
|
||||
{
|
||||
*res_y = info_ptr->y_pixels_per_unit;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
}
|
||||
if (unit_type != NULL)
|
||||
{
|
||||
*unit_type = (int)info_ptr->phys_unit_type;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
if(*unit_type == 1)
|
||||
{
|
||||
if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
|
||||
if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
|
||||
}
|
||||
}
|
||||
}
|
||||
return (retval);
|
||||
}
|
||||
#endif /* PNG_pHYs_SUPPORTED */
|
||||
#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
|
||||
|
||||
/* png_get_channels really belongs in here, too, but it's been around longer */
|
||||
|
||||
#endif /* PNG_EASY_ACCESS_SUPPORTED */
|
||||
|
||||
png_byte PNGAPI
|
||||
png_get_channels(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
return(info_ptr->channels);
|
||||
else
|
||||
return (0);
|
||||
}
|
||||
|
||||
png_bytep PNGAPI
|
||||
png_get_signature(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL)
|
||||
return(info_ptr->signature);
|
||||
else
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
#if defined(PNG_bKGD_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
|
||||
png_color_16p *background)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
|
||||
&& background != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "bKGD");
|
||||
*background = &(info_ptr->background);
|
||||
return (PNG_INFO_bKGD);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_cHRM_SUPPORTED)
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
|
||||
double *white_x, double *white_y, double *red_x, double *red_y,
|
||||
double *green_x, double *green_y, double *blue_x, double *blue_y)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "cHRM");
|
||||
if (white_x != NULL)
|
||||
*white_x = (double)info_ptr->x_white;
|
||||
if (white_y != NULL)
|
||||
*white_y = (double)info_ptr->y_white;
|
||||
if (red_x != NULL)
|
||||
*red_x = (double)info_ptr->x_red;
|
||||
if (red_y != NULL)
|
||||
*red_y = (double)info_ptr->y_red;
|
||||
if (green_x != NULL)
|
||||
*green_x = (double)info_ptr->x_green;
|
||||
if (green_y != NULL)
|
||||
*green_y = (double)info_ptr->y_green;
|
||||
if (blue_x != NULL)
|
||||
*blue_x = (double)info_ptr->x_blue;
|
||||
if (blue_y != NULL)
|
||||
*blue_y = (double)info_ptr->y_blue;
|
||||
return (PNG_INFO_cHRM);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
#ifdef PNG_FIXED_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
|
||||
png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
|
||||
png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
|
||||
png_fixed_point *blue_x, png_fixed_point *blue_y)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "cHRM");
|
||||
if (white_x != NULL)
|
||||
*white_x = info_ptr->int_x_white;
|
||||
if (white_y != NULL)
|
||||
*white_y = info_ptr->int_y_white;
|
||||
if (red_x != NULL)
|
||||
*red_x = info_ptr->int_x_red;
|
||||
if (red_y != NULL)
|
||||
*red_y = info_ptr->int_y_red;
|
||||
if (green_x != NULL)
|
||||
*green_x = info_ptr->int_x_green;
|
||||
if (green_y != NULL)
|
||||
*green_y = info_ptr->int_y_green;
|
||||
if (blue_x != NULL)
|
||||
*blue_x = info_ptr->int_x_blue;
|
||||
if (blue_y != NULL)
|
||||
*blue_y = info_ptr->int_y_blue;
|
||||
return (PNG_INFO_cHRM);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#if defined(PNG_gAMA_SUPPORTED)
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
|
||||
&& file_gamma != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "gAMA");
|
||||
*file_gamma = (double)info_ptr->gamma;
|
||||
return (PNG_INFO_gAMA);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
#ifdef PNG_FIXED_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
|
||||
png_fixed_point *int_file_gamma)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
|
||||
&& int_file_gamma != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "gAMA");
|
||||
*int_file_gamma = info_ptr->int_gamma;
|
||||
return (PNG_INFO_gAMA);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#if defined(PNG_sRGB_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
|
||||
&& file_srgb_intent != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "sRGB");
|
||||
*file_srgb_intent = (int)info_ptr->srgb_intent;
|
||||
return (PNG_INFO_sRGB);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_iCCP_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
|
||||
png_charpp name, int *compression_type,
|
||||
png_charpp profile, png_uint_32 *proflen)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
|
||||
&& name != NULL && profile != NULL && proflen != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "iCCP");
|
||||
*name = info_ptr->iccp_name;
|
||||
*profile = info_ptr->iccp_profile;
|
||||
/* compression_type is a dummy so the API won't have to change
|
||||
if we introduce multiple compression types later. */
|
||||
*proflen = (int)info_ptr->iccp_proflen;
|
||||
*compression_type = (int)info_ptr->iccp_compression;
|
||||
return (PNG_INFO_iCCP);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_sPLT_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
|
||||
png_sPLT_tpp spalettes)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
|
||||
{
|
||||
*spalettes = info_ptr->splt_palettes;
|
||||
return ((png_uint_32)info_ptr->splt_palettes_num);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_hIST_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
|
||||
&& hist != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "hIST");
|
||||
*hist = info_ptr->hist;
|
||||
return (PNG_INFO_hIST);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
|
||||
png_uint_32 *width, png_uint_32 *height, int *bit_depth,
|
||||
int *color_type, int *interlace_type, int *compression_type,
|
||||
int *filter_type)
|
||||
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
|
||||
bit_depth != NULL && color_type != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "IHDR");
|
||||
*width = info_ptr->width;
|
||||
*height = info_ptr->height;
|
||||
*bit_depth = info_ptr->bit_depth;
|
||||
if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16)
|
||||
png_error(png_ptr, "Invalid bit depth");
|
||||
*color_type = info_ptr->color_type;
|
||||
if (info_ptr->color_type > 6)
|
||||
png_error(png_ptr, "Invalid color type");
|
||||
if (compression_type != NULL)
|
||||
*compression_type = info_ptr->compression_type;
|
||||
if (filter_type != NULL)
|
||||
*filter_type = info_ptr->filter_type;
|
||||
if (interlace_type != NULL)
|
||||
*interlace_type = info_ptr->interlace_type;
|
||||
|
||||
/* check for potential overflow of rowbytes */
|
||||
if (*width == 0 || *width > PNG_UINT_31_MAX)
|
||||
png_error(png_ptr, "Invalid image width");
|
||||
if (*height == 0 || *height > PNG_UINT_31_MAX)
|
||||
png_error(png_ptr, "Invalid image height");
|
||||
if (info_ptr->width > (PNG_UINT_32_MAX
|
||||
>> 3) /* 8-byte RGBA pixels */
|
||||
- 64 /* bigrowbuf hack */
|
||||
- 1 /* filter byte */
|
||||
- 7*8 /* rounding of width to multiple of 8 pixels */
|
||||
- 8) /* extra max_pixel_depth pad */
|
||||
{
|
||||
png_warning(png_ptr,
|
||||
"Width too large for libpng to process image data.");
|
||||
}
|
||||
return (1);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
#if defined(PNG_oFFs_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
|
||||
png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
|
||||
&& offset_x != NULL && offset_y != NULL && unit_type != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "oFFs");
|
||||
*offset_x = info_ptr->x_offset;
|
||||
*offset_y = info_ptr->y_offset;
|
||||
*unit_type = (int)info_ptr->offset_unit_type;
|
||||
return (PNG_INFO_oFFs);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_pCAL_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
|
||||
png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
|
||||
png_charp *units, png_charpp *params)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
|
||||
&& purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
|
||||
nparams != NULL && units != NULL && params != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "pCAL");
|
||||
*purpose = info_ptr->pcal_purpose;
|
||||
*X0 = info_ptr->pcal_X0;
|
||||
*X1 = info_ptr->pcal_X1;
|
||||
*type = (int)info_ptr->pcal_type;
|
||||
*nparams = (int)info_ptr->pcal_nparams;
|
||||
*units = info_ptr->pcal_units;
|
||||
*params = info_ptr->pcal_params;
|
||||
return (PNG_INFO_pCAL);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_sCAL_SUPPORTED)
|
||||
#ifdef PNG_FLOATING_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
|
||||
int *unit, double *width, double *height)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL &&
|
||||
(info_ptr->valid & PNG_INFO_sCAL))
|
||||
{
|
||||
*unit = info_ptr->scal_unit;
|
||||
*width = info_ptr->scal_pixel_width;
|
||||
*height = info_ptr->scal_pixel_height;
|
||||
return (PNG_INFO_sCAL);
|
||||
}
|
||||
return(0);
|
||||
}
|
||||
#else
|
||||
#ifdef PNG_FIXED_POINT_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
|
||||
int *unit, png_charpp width, png_charpp height)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL &&
|
||||
(info_ptr->valid & PNG_INFO_sCAL))
|
||||
{
|
||||
*unit = info_ptr->scal_unit;
|
||||
*width = info_ptr->scal_s_width;
|
||||
*height = info_ptr->scal_s_height;
|
||||
return (PNG_INFO_sCAL);
|
||||
}
|
||||
return(0);
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#if defined(PNG_pHYs_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
|
||||
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
|
||||
{
|
||||
png_uint_32 retval = 0;
|
||||
|
||||
if (png_ptr != NULL && info_ptr != NULL &&
|
||||
(info_ptr->valid & PNG_INFO_pHYs))
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "pHYs");
|
||||
if (res_x != NULL)
|
||||
{
|
||||
*res_x = info_ptr->x_pixels_per_unit;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
}
|
||||
if (res_y != NULL)
|
||||
{
|
||||
*res_y = info_ptr->y_pixels_per_unit;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
}
|
||||
if (unit_type != NULL)
|
||||
{
|
||||
*unit_type = (int)info_ptr->phys_unit_type;
|
||||
retval |= PNG_INFO_pHYs;
|
||||
}
|
||||
}
|
||||
return (retval);
|
||||
}
|
||||
#endif
|
||||
|
||||
png_uint_32 PNGAPI
|
||||
png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
|
||||
int *num_palette)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
|
||||
&& palette != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "PLTE");
|
||||
*palette = info_ptr->palette;
|
||||
*num_palette = info_ptr->num_palette;
|
||||
png_debug1(3, "num_palette = %d\n", *num_palette);
|
||||
return (PNG_INFO_PLTE);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
#if defined(PNG_sBIT_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
|
||||
&& sig_bit != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "sBIT");
|
||||
*sig_bit = &(info_ptr->sig_bit);
|
||||
return (PNG_INFO_sBIT);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_TEXT_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
|
||||
int *num_text)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n",
|
||||
(png_ptr->chunk_name[0] == '\0' ? "text"
|
||||
: (png_const_charp)png_ptr->chunk_name));
|
||||
if (text_ptr != NULL)
|
||||
*text_ptr = info_ptr->text;
|
||||
if (num_text != NULL)
|
||||
*num_text = info_ptr->num_text;
|
||||
return ((png_uint_32)info_ptr->num_text);
|
||||
}
|
||||
if (num_text != NULL)
|
||||
*num_text = 0;
|
||||
return(0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_tIME_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
|
||||
&& mod_time != NULL)
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "tIME");
|
||||
*mod_time = &(info_ptr->mod_time);
|
||||
return (PNG_INFO_tIME);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_tRNS_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
|
||||
png_bytep *trans, int *num_trans, png_color_16p *trans_values)
|
||||
{
|
||||
png_uint_32 retval = 0;
|
||||
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
|
||||
{
|
||||
png_debug1(1, "in %s retrieval function\n", "tRNS");
|
||||
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
|
||||
{
|
||||
if (trans != NULL)
|
||||
{
|
||||
*trans = info_ptr->trans;
|
||||
retval |= PNG_INFO_tRNS;
|
||||
}
|
||||
if (trans_values != NULL)
|
||||
*trans_values = &(info_ptr->trans_values);
|
||||
}
|
||||
else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
|
||||
{
|
||||
if (trans_values != NULL)
|
||||
{
|
||||
*trans_values = &(info_ptr->trans_values);
|
||||
retval |= PNG_INFO_tRNS;
|
||||
}
|
||||
if(trans != NULL)
|
||||
*trans = NULL;
|
||||
}
|
||||
if(num_trans != NULL)
|
||||
{
|
||||
*num_trans = info_ptr->num_trans;
|
||||
retval |= PNG_INFO_tRNS;
|
||||
}
|
||||
}
|
||||
return (retval);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
|
||||
png_uint_32 PNGAPI
|
||||
png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
|
||||
png_unknown_chunkpp unknowns)
|
||||
{
|
||||
if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
|
||||
{
|
||||
*unknowns = info_ptr->unknown_chunks;
|
||||
return ((png_uint_32)info_ptr->unknown_chunks_num);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
|
||||
png_byte PNGAPI
|
||||
png_get_rgb_to_gray_status (png_structp png_ptr)
|
||||
{
|
||||
return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_USER_CHUNKS_SUPPORTED)
|
||||
png_voidp PNGAPI
|
||||
png_get_user_chunk_ptr(png_structp png_ptr)
|
||||
{
|
||||
return (png_ptr? png_ptr->user_chunk_ptr : NULL);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_get_compression_buffer_size(png_structp png_ptr)
|
||||
{
|
||||
return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
|
||||
#ifndef PNG_1_0_X
|
||||
/* this function was added to libpng 1.2.0 and should exist by default */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_asm_flags (png_structp png_ptr)
|
||||
{
|
||||
/* obsolete, to be removed from libpng-1.4.0 */
|
||||
return (png_ptr? 0L: 0L);
|
||||
}
|
||||
|
||||
/* this function was added to libpng 1.2.0 and should exist by default */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_asm_flagmask (int flag_select)
|
||||
{
|
||||
/* obsolete, to be removed from libpng-1.4.0 */
|
||||
flag_select=flag_select;
|
||||
return 0L;
|
||||
}
|
||||
|
||||
/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
|
||||
/* this function was added to libpng 1.2.0 */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_mmx_flagmask (int flag_select, int *compilerID)
|
||||
{
|
||||
/* obsolete, to be removed from libpng-1.4.0 */
|
||||
flag_select=flag_select;
|
||||
*compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */
|
||||
return 0L;
|
||||
}
|
||||
|
||||
/* this function was added to libpng 1.2.0 */
|
||||
png_byte PNGAPI
|
||||
png_get_mmx_bitdepth_threshold (png_structp png_ptr)
|
||||
{
|
||||
/* obsolete, to be removed from libpng-1.4.0 */
|
||||
return (png_ptr? 0: 0);
|
||||
}
|
||||
|
||||
/* this function was added to libpng 1.2.0 */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_mmx_rowbytes_threshold (png_structp png_ptr)
|
||||
{
|
||||
/* obsolete, to be removed from libpng-1.4.0 */
|
||||
return (png_ptr? 0L: 0L);
|
||||
}
|
||||
#endif /* ?PNG_1_0_X */
|
||||
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
|
||||
|
||||
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
|
||||
/* these functions were added to libpng 1.2.6 */
|
||||
png_uint_32 PNGAPI
|
||||
png_get_user_width_max (png_structp png_ptr)
|
||||
{
|
||||
return (png_ptr? png_ptr->user_width_max : 0);
|
||||
}
|
||||
png_uint_32 PNGAPI
|
||||
png_get_user_height_max (png_structp png_ptr)
|
||||
{
|
||||
return (png_ptr? png_ptr->user_height_max : 0);
|
||||
}
|
||||
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
|
||||
|
||||
|
||||
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
|
||||
@@ -0,0 +1,608 @@
|
||||
|
||||
/* pngmem.c - stub functions for memory allocation
|
||||
*
|
||||
* Last changed in libpng 1.2.13 November 13, 2006
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2006 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.)
|
||||
*
|
||||
* This file provides a location for all memory allocation. Users who
|
||||
* need special memory handling are expected to supply replacement
|
||||
* functions for png_malloc() and png_free(), and to use
|
||||
* png_create_read_struct_2() and png_create_write_struct_2() to
|
||||
* identify the replacement functions.
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
|
||||
/* Borland DOS special memory handler */
|
||||
#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
|
||||
/* if you change this, be sure to change the one in png.h also */
|
||||
|
||||
/* Allocate memory for a png_struct. The malloc and memset can be replaced
|
||||
by a single call to calloc() if this is thought to improve performance. */
|
||||
png_voidp /* PRIVATE */
|
||||
png_create_struct(int type)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
return (png_create_struct_2(type, png_malloc_ptr_NULL, png_voidp_NULL));
|
||||
}
|
||||
|
||||
/* Alternate version of png_create_struct, for use with user-defined malloc. */
|
||||
png_voidp /* PRIVATE */
|
||||
png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
|
||||
{
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
png_size_t size;
|
||||
png_voidp struct_ptr;
|
||||
|
||||
if (type == PNG_STRUCT_INFO)
|
||||
size = png_sizeof(png_info);
|
||||
else if (type == PNG_STRUCT_PNG)
|
||||
size = png_sizeof(png_struct);
|
||||
else
|
||||
return (png_get_copyright(NULL));
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(malloc_fn != NULL)
|
||||
{
|
||||
png_struct dummy_struct;
|
||||
png_structp png_ptr = &dummy_struct;
|
||||
png_ptr->mem_ptr=mem_ptr;
|
||||
struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size);
|
||||
}
|
||||
else
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
struct_ptr = (png_voidp)farmalloc(size);
|
||||
if (struct_ptr != NULL)
|
||||
png_memset(struct_ptr, 0, size);
|
||||
return (struct_ptr);
|
||||
}
|
||||
|
||||
/* Free memory allocated by a png_create_struct() call */
|
||||
void /* PRIVATE */
|
||||
png_destroy_struct(png_voidp struct_ptr)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
png_destroy_struct_2(struct_ptr, png_free_ptr_NULL, png_voidp_NULL);
|
||||
}
|
||||
|
||||
/* Free memory allocated by a png_create_struct() call */
|
||||
void /* PRIVATE */
|
||||
png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
|
||||
png_voidp mem_ptr)
|
||||
{
|
||||
#endif
|
||||
if (struct_ptr != NULL)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(free_fn != NULL)
|
||||
{
|
||||
png_struct dummy_struct;
|
||||
png_structp png_ptr = &dummy_struct;
|
||||
png_ptr->mem_ptr=mem_ptr;
|
||||
(*(free_fn))(png_ptr, struct_ptr);
|
||||
return;
|
||||
}
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
farfree (struct_ptr);
|
||||
}
|
||||
}
|
||||
|
||||
/* Allocate memory. For reasonable files, size should never exceed
|
||||
* 64K. However, zlib may allocate more then 64K if you don't tell
|
||||
* it not to. See zconf.h and png.h for more information. zlib does
|
||||
* need to allocate exactly 64K, so whatever you call here must
|
||||
* have the ability to do that.
|
||||
*
|
||||
* Borland seems to have a problem in DOS mode for exactly 64K.
|
||||
* It gives you a segment with an offset of 8 (perhaps to store its
|
||||
* memory stuff). zlib doesn't like this at all, so we have to
|
||||
* detect and deal with it. This code should not be needed in
|
||||
* Windows or OS/2 modes, and only in 16 bit mode. This code has
|
||||
* been updated by Alexander Lehmann for version 0.89 to waste less
|
||||
* memory.
|
||||
*
|
||||
* Note that we can't use png_size_t for the "size" declaration,
|
||||
* since on some systems a png_size_t is a 16-bit quantity, and as a
|
||||
* result, we would be truncating potentially larger memory requests
|
||||
* (which should cause a fatal error) and introducing major problems.
|
||||
*/
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_malloc(png_structp png_ptr, png_uint_32 size)
|
||||
{
|
||||
png_voidp ret;
|
||||
|
||||
if (png_ptr == NULL || size == 0)
|
||||
return (NULL);
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(png_ptr->malloc_fn != NULL)
|
||||
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
|
||||
else
|
||||
ret = (png_malloc_default(png_ptr, size));
|
||||
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out of memory!");
|
||||
return (ret);
|
||||
}
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_malloc_default(png_structp png_ptr, png_uint_32 size)
|
||||
{
|
||||
png_voidp ret;
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
if (png_ptr == NULL || size == 0)
|
||||
return (NULL);
|
||||
|
||||
#ifdef PNG_MAX_MALLOC_64K
|
||||
if (size > (png_uint_32)65536L)
|
||||
{
|
||||
png_warning(png_ptr, "Cannot Allocate > 64K");
|
||||
ret = NULL;
|
||||
}
|
||||
else
|
||||
#endif
|
||||
|
||||
if (size != (size_t)size)
|
||||
ret = NULL;
|
||||
else if (size == (png_uint_32)65536L)
|
||||
{
|
||||
if (png_ptr->offset_table == NULL)
|
||||
{
|
||||
/* try to see if we need to do any of this fancy stuff */
|
||||
ret = farmalloc(size);
|
||||
if (ret == NULL || ((png_size_t)ret & 0xffff))
|
||||
{
|
||||
int num_blocks;
|
||||
png_uint_32 total_size;
|
||||
png_bytep table;
|
||||
int i;
|
||||
png_byte huge * hptr;
|
||||
|
||||
if (ret != NULL)
|
||||
{
|
||||
farfree(ret);
|
||||
ret = NULL;
|
||||
}
|
||||
|
||||
if(png_ptr->zlib_window_bits > 14)
|
||||
num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14));
|
||||
else
|
||||
num_blocks = 1;
|
||||
if (png_ptr->zlib_mem_level >= 7)
|
||||
num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7));
|
||||
else
|
||||
num_blocks++;
|
||||
|
||||
total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16;
|
||||
|
||||
table = farmalloc(total_size);
|
||||
|
||||
if (table == NULL)
|
||||
{
|
||||
#ifndef PNG_USER_MEM_SUPPORTED
|
||||
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out Of Memory."); /* Note "O" and "M" */
|
||||
else
|
||||
png_warning(png_ptr, "Out Of Memory.");
|
||||
#endif
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
if ((png_size_t)table & 0xfff0)
|
||||
{
|
||||
#ifndef PNG_USER_MEM_SUPPORTED
|
||||
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr,
|
||||
"Farmalloc didn't return normalized pointer");
|
||||
else
|
||||
png_warning(png_ptr,
|
||||
"Farmalloc didn't return normalized pointer");
|
||||
#endif
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
png_ptr->offset_table = table;
|
||||
png_ptr->offset_table_ptr = farmalloc(num_blocks *
|
||||
png_sizeof (png_bytep));
|
||||
|
||||
if (png_ptr->offset_table_ptr == NULL)
|
||||
{
|
||||
#ifndef PNG_USER_MEM_SUPPORTED
|
||||
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out Of memory."); /* Note "O" and "M" */
|
||||
else
|
||||
png_warning(png_ptr, "Out Of memory.");
|
||||
#endif
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
hptr = (png_byte huge *)table;
|
||||
if ((png_size_t)hptr & 0xf)
|
||||
{
|
||||
hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L);
|
||||
hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */
|
||||
}
|
||||
for (i = 0; i < num_blocks; i++)
|
||||
{
|
||||
png_ptr->offset_table_ptr[i] = (png_bytep)hptr;
|
||||
hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */
|
||||
}
|
||||
|
||||
png_ptr->offset_table_number = num_blocks;
|
||||
png_ptr->offset_table_count = 0;
|
||||
png_ptr->offset_table_count_free = 0;
|
||||
}
|
||||
}
|
||||
|
||||
if (png_ptr->offset_table_count >= png_ptr->offset_table_number)
|
||||
{
|
||||
#ifndef PNG_USER_MEM_SUPPORTED
|
||||
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out of Memory."); /* Note "o" and "M" */
|
||||
else
|
||||
png_warning(png_ptr, "Out of Memory.");
|
||||
#endif
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++];
|
||||
}
|
||||
else
|
||||
ret = farmalloc(size);
|
||||
|
||||
#ifndef PNG_USER_MEM_SUPPORTED
|
||||
if (ret == NULL)
|
||||
{
|
||||
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */
|
||||
else
|
||||
png_warning(png_ptr, "Out of memory."); /* Note "o" and "m" */
|
||||
}
|
||||
#endif
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
/* free a pointer allocated by png_malloc(). In the default
|
||||
configuration, png_ptr is not used, but is passed in case it
|
||||
is needed. If ptr is NULL, return without taking any action. */
|
||||
void PNGAPI
|
||||
png_free(png_structp png_ptr, png_voidp ptr)
|
||||
{
|
||||
if (png_ptr == NULL || ptr == NULL)
|
||||
return;
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if (png_ptr->free_fn != NULL)
|
||||
{
|
||||
(*(png_ptr->free_fn))(png_ptr, ptr);
|
||||
return;
|
||||
}
|
||||
else png_free_default(png_ptr, ptr);
|
||||
}
|
||||
|
||||
void PNGAPI
|
||||
png_free_default(png_structp png_ptr, png_voidp ptr)
|
||||
{
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
if(png_ptr == NULL) return;
|
||||
|
||||
if (png_ptr->offset_table != NULL)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < png_ptr->offset_table_count; i++)
|
||||
{
|
||||
if (ptr == png_ptr->offset_table_ptr[i])
|
||||
{
|
||||
ptr = NULL;
|
||||
png_ptr->offset_table_count_free++;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (png_ptr->offset_table_count_free == png_ptr->offset_table_count)
|
||||
{
|
||||
farfree(png_ptr->offset_table);
|
||||
farfree(png_ptr->offset_table_ptr);
|
||||
png_ptr->offset_table = NULL;
|
||||
png_ptr->offset_table_ptr = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
if (ptr != NULL)
|
||||
{
|
||||
farfree(ptr);
|
||||
}
|
||||
}
|
||||
|
||||
#else /* Not the Borland DOS special memory handler */
|
||||
|
||||
/* Allocate memory for a png_struct or a png_info. The malloc and
|
||||
memset can be replaced by a single call to calloc() if this is thought
|
||||
to improve performance noticably. */
|
||||
png_voidp /* PRIVATE */
|
||||
png_create_struct(int type)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
return (png_create_struct_2(type, png_malloc_ptr_NULL, png_voidp_NULL));
|
||||
}
|
||||
|
||||
/* Allocate memory for a png_struct or a png_info. The malloc and
|
||||
memset can be replaced by a single call to calloc() if this is thought
|
||||
to improve performance noticably. */
|
||||
png_voidp /* PRIVATE */
|
||||
png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
|
||||
{
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
png_size_t size;
|
||||
png_voidp struct_ptr;
|
||||
|
||||
if (type == PNG_STRUCT_INFO)
|
||||
size = png_sizeof(png_info);
|
||||
else if (type == PNG_STRUCT_PNG)
|
||||
size = png_sizeof(png_struct);
|
||||
else
|
||||
return (NULL);
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(malloc_fn != NULL)
|
||||
{
|
||||
png_struct dummy_struct;
|
||||
png_structp png_ptr = &dummy_struct;
|
||||
png_ptr->mem_ptr=mem_ptr;
|
||||
struct_ptr = (*(malloc_fn))(png_ptr, size);
|
||||
if (struct_ptr != NULL)
|
||||
png_memset(struct_ptr, 0, size);
|
||||
return (struct_ptr);
|
||||
}
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
#if defined(__TURBOC__) && !defined(__FLAT__)
|
||||
struct_ptr = (png_voidp)farmalloc(size);
|
||||
#else
|
||||
# if defined(_MSC_VER) && defined(MAXSEG_64K)
|
||||
struct_ptr = (png_voidp)halloc(size,1);
|
||||
# else
|
||||
struct_ptr = (png_voidp)malloc(size);
|
||||
# endif
|
||||
#endif
|
||||
if (struct_ptr != NULL)
|
||||
png_memset(struct_ptr, 0, size);
|
||||
|
||||
return (struct_ptr);
|
||||
}
|
||||
|
||||
|
||||
/* Free memory allocated by a png_create_struct() call */
|
||||
void /* PRIVATE */
|
||||
png_destroy_struct(png_voidp struct_ptr)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
png_destroy_struct_2(struct_ptr, png_free_ptr_NULL, png_voidp_NULL);
|
||||
}
|
||||
|
||||
/* Free memory allocated by a png_create_struct() call */
|
||||
void /* PRIVATE */
|
||||
png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
|
||||
png_voidp mem_ptr)
|
||||
{
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
if (struct_ptr != NULL)
|
||||
{
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if(free_fn != NULL)
|
||||
{
|
||||
png_struct dummy_struct;
|
||||
png_structp png_ptr = &dummy_struct;
|
||||
png_ptr->mem_ptr=mem_ptr;
|
||||
(*(free_fn))(png_ptr, struct_ptr);
|
||||
return;
|
||||
}
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
#if defined(__TURBOC__) && !defined(__FLAT__)
|
||||
farfree(struct_ptr);
|
||||
#else
|
||||
# if defined(_MSC_VER) && defined(MAXSEG_64K)
|
||||
hfree(struct_ptr);
|
||||
# else
|
||||
free(struct_ptr);
|
||||
# endif
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
/* Allocate memory. For reasonable files, size should never exceed
|
||||
64K. However, zlib may allocate more then 64K if you don't tell
|
||||
it not to. See zconf.h and png.h for more information. zlib does
|
||||
need to allocate exactly 64K, so whatever you call here must
|
||||
have the ability to do that. */
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_malloc(png_structp png_ptr, png_uint_32 size)
|
||||
{
|
||||
png_voidp ret;
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if (png_ptr == NULL || size == 0)
|
||||
return (NULL);
|
||||
|
||||
if(png_ptr->malloc_fn != NULL)
|
||||
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
|
||||
else
|
||||
ret = (png_malloc_default(png_ptr, size));
|
||||
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out of Memory!");
|
||||
return (ret);
|
||||
}
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_malloc_default(png_structp png_ptr, png_uint_32 size)
|
||||
{
|
||||
png_voidp ret;
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
if (png_ptr == NULL || size == 0)
|
||||
return (NULL);
|
||||
|
||||
#ifdef PNG_MAX_MALLOC_64K
|
||||
if (size > (png_uint_32)65536L)
|
||||
{
|
||||
#ifndef PNG_USER_MEM_SUPPORTED
|
||||
if(png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Cannot Allocate > 64K");
|
||||
else
|
||||
#endif
|
||||
return NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Check for overflow */
|
||||
#if defined(__TURBOC__) && !defined(__FLAT__)
|
||||
if (size != (unsigned long)size)
|
||||
ret = NULL;
|
||||
else
|
||||
ret = farmalloc(size);
|
||||
#else
|
||||
# if defined(_MSC_VER) && defined(MAXSEG_64K)
|
||||
if (size != (unsigned long)size)
|
||||
ret = NULL;
|
||||
else
|
||||
ret = halloc(size, 1);
|
||||
# else
|
||||
if (size != (size_t)size)
|
||||
ret = NULL;
|
||||
else
|
||||
ret = malloc((size_t)size);
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifndef PNG_USER_MEM_SUPPORTED
|
||||
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
|
||||
png_error(png_ptr, "Out of Memory");
|
||||
#endif
|
||||
|
||||
return (ret);
|
||||
}
|
||||
|
||||
/* Free a pointer allocated by png_malloc(). If ptr is NULL, return
|
||||
without taking any action. */
|
||||
void PNGAPI
|
||||
png_free(png_structp png_ptr, png_voidp ptr)
|
||||
{
|
||||
if (png_ptr == NULL || ptr == NULL)
|
||||
return;
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
if (png_ptr->free_fn != NULL)
|
||||
{
|
||||
(*(png_ptr->free_fn))(png_ptr, ptr);
|
||||
return;
|
||||
}
|
||||
else png_free_default(png_ptr, ptr);
|
||||
}
|
||||
void PNGAPI
|
||||
png_free_default(png_structp png_ptr, png_voidp ptr)
|
||||
{
|
||||
if (png_ptr == NULL || ptr == NULL)
|
||||
return;
|
||||
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
|
||||
#if defined(__TURBOC__) && !defined(__FLAT__)
|
||||
farfree(ptr);
|
||||
#else
|
||||
# if defined(_MSC_VER) && defined(MAXSEG_64K)
|
||||
hfree(ptr);
|
||||
# else
|
||||
free(ptr);
|
||||
# endif
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif /* Not Borland DOS special memory handler */
|
||||
|
||||
#if defined(PNG_1_0_X)
|
||||
# define png_malloc_warn png_malloc
|
||||
#else
|
||||
/* This function was added at libpng version 1.2.3. The png_malloc_warn()
|
||||
* function will set up png_malloc() to issue a png_warning and return NULL
|
||||
* instead of issuing a png_error, if it fails to allocate the requested
|
||||
* memory.
|
||||
*/
|
||||
png_voidp PNGAPI
|
||||
png_malloc_warn(png_structp png_ptr, png_uint_32 size)
|
||||
{
|
||||
png_voidp ptr;
|
||||
png_uint_32 save_flags;
|
||||
if(png_ptr == NULL) return (NULL);
|
||||
|
||||
save_flags=png_ptr->flags;
|
||||
png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
|
||||
ptr = (png_voidp)png_malloc((png_structp)png_ptr, size);
|
||||
png_ptr->flags=save_flags;
|
||||
return(ptr);
|
||||
}
|
||||
#endif
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
|
||||
png_uint_32 length)
|
||||
{
|
||||
png_size_t size;
|
||||
|
||||
size = (png_size_t)length;
|
||||
if ((png_uint_32)size != length)
|
||||
png_error(png_ptr,"Overflow in png_memcpy_check.");
|
||||
|
||||
return(png_memcpy (s1, s2, size));
|
||||
}
|
||||
|
||||
png_voidp PNGAPI
|
||||
png_memset_check (png_structp png_ptr, png_voidp s1, int value,
|
||||
png_uint_32 length)
|
||||
{
|
||||
png_size_t size;
|
||||
|
||||
size = (png_size_t)length;
|
||||
if ((png_uint_32)size != length)
|
||||
png_error(png_ptr,"Overflow in png_memset_check.");
|
||||
|
||||
return (png_memset (s1, value, size));
|
||||
|
||||
}
|
||||
|
||||
#ifdef PNG_USER_MEM_SUPPORTED
|
||||
/* This function is called when the application wants to use another method
|
||||
* of allocating and freeing memory.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
|
||||
malloc_fn, png_free_ptr free_fn)
|
||||
{
|
||||
if(png_ptr != NULL) {
|
||||
png_ptr->mem_ptr = mem_ptr;
|
||||
png_ptr->malloc_fn = malloc_fn;
|
||||
png_ptr->free_fn = free_fn;
|
||||
}
|
||||
}
|
||||
|
||||
/* This function returns a pointer to the mem_ptr associated with the user
|
||||
* functions. The application should free any memory associated with this
|
||||
* pointer before png_write_destroy and png_read_destroy are called.
|
||||
*/
|
||||
png_voidp PNGAPI
|
||||
png_get_mem_ptr(png_structp png_ptr)
|
||||
{
|
||||
if(png_ptr == NULL) return (NULL);
|
||||
return ((png_voidp)png_ptr->mem_ptr);
|
||||
}
|
||||
#endif /* PNG_USER_MEM_SUPPORTED */
|
||||
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,167 @@
|
||||
|
||||
/* pngrio.c - functions for data input
|
||||
*
|
||||
* Last changed in libpng 1.2.13 November 13, 2006
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2006 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.)
|
||||
*
|
||||
* This file provides a location for all input. Users who need
|
||||
* special handling are expected to write a function that has the same
|
||||
* arguments as this and performs a similar function, but that possibly
|
||||
* has a different input method. Note that you shouldn't change this
|
||||
* function, but rather write a replacement function and then make
|
||||
* libpng use it at run time with png_set_read_fn(...).
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED)
|
||||
|
||||
/* Read the data from whatever input you are using. The default routine
|
||||
reads from a file pointer. Note that this routine sometimes gets called
|
||||
with very small lengths, so you should implement some kind of simple
|
||||
buffering if you are using unbuffered reads. This should never be asked
|
||||
to read more then 64K on a 16 bit machine. */
|
||||
void /* PRIVATE */
|
||||
png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_debug1(4,"reading %d bytes\n", (int)length);
|
||||
if (png_ptr->read_data_fn != NULL)
|
||||
(*(png_ptr->read_data_fn))(png_ptr, data, length);
|
||||
else
|
||||
png_error(png_ptr, "Call to NULL read function");
|
||||
}
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
/* This is the function that does the actual reading of data. If you are
|
||||
not reading from a standard C stream, you should create a replacement
|
||||
read_data function and use it at run time with png_set_read_fn(), rather
|
||||
than changing the library. */
|
||||
#ifndef USE_FAR_KEYWORD
|
||||
void PNGAPI
|
||||
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_size_t check;
|
||||
|
||||
if(png_ptr == NULL) return;
|
||||
/* fread() returns 0 on error, so it is OK to store this in a png_size_t
|
||||
* instead of an int, which is what fread() actually returns.
|
||||
*/
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
|
||||
check = 0;
|
||||
#else
|
||||
check = (png_size_t)fread(data, (png_size_t)1, length,
|
||||
(png_FILE_p)png_ptr->io_ptr);
|
||||
#endif
|
||||
|
||||
if (check != length)
|
||||
png_error(png_ptr, "Read Error");
|
||||
}
|
||||
#else
|
||||
/* this is the model-independent version. Since the standard I/O library
|
||||
can't handle far buffers in the medium and small models, we have to copy
|
||||
the data.
|
||||
*/
|
||||
|
||||
#define NEAR_BUF_SIZE 256
|
||||
#define MIN(a,b) (a <= b ? a : b)
|
||||
|
||||
static void PNGAPI
|
||||
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
int check;
|
||||
png_byte *n_data;
|
||||
png_FILE_p io_ptr;
|
||||
|
||||
if(png_ptr == NULL) return;
|
||||
/* Check if data really is near. If so, use usual code. */
|
||||
n_data = (png_byte *)CVT_PTR_NOCHECK(data);
|
||||
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
|
||||
if ((png_bytep)n_data == data)
|
||||
{
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
|
||||
check = 0;
|
||||
#else
|
||||
check = fread(n_data, 1, length, io_ptr);
|
||||
#endif
|
||||
}
|
||||
else
|
||||
{
|
||||
png_byte buf[NEAR_BUF_SIZE];
|
||||
png_size_t read, remaining, err;
|
||||
check = 0;
|
||||
remaining = length;
|
||||
do
|
||||
{
|
||||
read = MIN(NEAR_BUF_SIZE, remaining);
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !ReadFile((HANDLE)(io_ptr), buf, read, &err, NULL) )
|
||||
err = 0;
|
||||
#else
|
||||
err = fread(buf, (png_size_t)1, read, io_ptr);
|
||||
#endif
|
||||
png_memcpy(data, buf, read); /* copy far buffer to near buffer */
|
||||
if(err != read)
|
||||
break;
|
||||
else
|
||||
check += err;
|
||||
data += read;
|
||||
remaining -= read;
|
||||
}
|
||||
while (remaining != 0);
|
||||
}
|
||||
if ((png_uint_32)check != (png_uint_32)length)
|
||||
png_error(png_ptr, "read Error");
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* This function allows the application to supply a new input function
|
||||
for libpng if standard C streams aren't being used.
|
||||
|
||||
This function takes as its arguments:
|
||||
png_ptr - pointer to a png input data structure
|
||||
io_ptr - pointer to user supplied structure containing info about
|
||||
the input functions. May be NULL.
|
||||
read_data_fn - pointer to a new input function that takes as its
|
||||
arguments a pointer to a png_struct, a pointer to
|
||||
a location where input data can be stored, and a 32-bit
|
||||
unsigned int that is the number of bytes to be read.
|
||||
To exit and output any fatal error messages the new write
|
||||
function should call png_error(png_ptr, "Error msg"). */
|
||||
void PNGAPI
|
||||
png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
|
||||
png_rw_ptr read_data_fn)
|
||||
{
|
||||
if(png_ptr == NULL) return;
|
||||
png_ptr->io_ptr = io_ptr;
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
if (read_data_fn != NULL)
|
||||
png_ptr->read_data_fn = read_data_fn;
|
||||
else
|
||||
png_ptr->read_data_fn = png_default_read_data;
|
||||
#else
|
||||
png_ptr->read_data_fn = read_data_fn;
|
||||
#endif
|
||||
|
||||
/* It is an error to write to a read device */
|
||||
if (png_ptr->write_data_fn != NULL)
|
||||
{
|
||||
png_ptr->write_data_fn = NULL;
|
||||
png_warning(png_ptr,
|
||||
"It's an error to set both read_data_fn and write_data_fn in the ");
|
||||
png_warning(png_ptr,
|
||||
"same structure. Resetting write_data_fn to NULL.");
|
||||
}
|
||||
|
||||
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
|
||||
png_ptr->output_flush_fn = NULL;
|
||||
#endif
|
||||
}
|
||||
#endif /* PNG_READ_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,662 @@
|
||||
|
||||
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
|
||||
*
|
||||
* Last changed in libpng 1.2.17 May 15, 2007
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2007 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.)
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
|
||||
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
|
||||
/* turn on BGR-to-RGB mapping */
|
||||
void PNGAPI
|
||||
png_set_bgr(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_bgr\n");
|
||||
if(png_ptr == NULL) return;
|
||||
png_ptr->transformations |= PNG_BGR;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
|
||||
/* turn on 16 bit byte swapping */
|
||||
void PNGAPI
|
||||
png_set_swap(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_swap\n");
|
||||
if(png_ptr == NULL) return;
|
||||
if (png_ptr->bit_depth == 16)
|
||||
png_ptr->transformations |= PNG_SWAP_BYTES;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
|
||||
/* turn on pixel packing */
|
||||
void PNGAPI
|
||||
png_set_packing(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_packing\n");
|
||||
if(png_ptr == NULL) return;
|
||||
if (png_ptr->bit_depth < 8)
|
||||
{
|
||||
png_ptr->transformations |= PNG_PACK;
|
||||
png_ptr->usr_bit_depth = 8;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
|
||||
/* turn on packed pixel swapping */
|
||||
void PNGAPI
|
||||
png_set_packswap(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_packswap\n");
|
||||
if(png_ptr == NULL) return;
|
||||
if (png_ptr->bit_depth < 8)
|
||||
png_ptr->transformations |= PNG_PACKSWAP;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_shift(png_structp png_ptr, png_color_8p true_bits)
|
||||
{
|
||||
png_debug(1, "in png_set_shift\n");
|
||||
if(png_ptr == NULL) return;
|
||||
png_ptr->transformations |= PNG_SHIFT;
|
||||
png_ptr->shift = *true_bits;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
|
||||
defined(PNG_WRITE_INTERLACING_SUPPORTED)
|
||||
int PNGAPI
|
||||
png_set_interlace_handling(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_interlace handling\n");
|
||||
if (png_ptr && png_ptr->interlaced)
|
||||
{
|
||||
png_ptr->transformations |= PNG_INTERLACE;
|
||||
return (7);
|
||||
}
|
||||
|
||||
return (1);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
|
||||
/* Add a filler byte on read, or remove a filler or alpha byte on write.
|
||||
* The filler type has changed in v0.95 to allow future 2-byte fillers
|
||||
* for 48-bit input data, as well as to avoid problems with some compilers
|
||||
* that don't like bytes as parameters.
|
||||
*/
|
||||
void PNGAPI
|
||||
png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
|
||||
{
|
||||
png_debug(1, "in png_set_filler\n");
|
||||
if(png_ptr == NULL) return;
|
||||
png_ptr->transformations |= PNG_FILLER;
|
||||
png_ptr->filler = (png_byte)filler;
|
||||
if (filler_loc == PNG_FILLER_AFTER)
|
||||
png_ptr->flags |= PNG_FLAG_FILLER_AFTER;
|
||||
else
|
||||
png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER;
|
||||
|
||||
/* This should probably go in the "do_read_filler" routine.
|
||||
* I attempted to do that in libpng-1.0.1a but that caused problems
|
||||
* so I restored it in libpng-1.0.2a
|
||||
*/
|
||||
|
||||
if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
|
||||
{
|
||||
png_ptr->usr_channels = 4;
|
||||
}
|
||||
|
||||
/* Also I added this in libpng-1.0.2a (what happens when we expand
|
||||
* a less-than-8-bit grayscale to GA? */
|
||||
|
||||
if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY && png_ptr->bit_depth >= 8)
|
||||
{
|
||||
png_ptr->usr_channels = 2;
|
||||
}
|
||||
}
|
||||
|
||||
#if !defined(PNG_1_0_X)
|
||||
/* Added to libpng-1.2.7 */
|
||||
void PNGAPI
|
||||
png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
|
||||
{
|
||||
png_debug(1, "in png_set_add_alpha\n");
|
||||
if(png_ptr == NULL) return;
|
||||
png_set_filler(png_ptr, filler, filler_loc);
|
||||
png_ptr->transformations |= PNG_ADD_ALPHA;
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
|
||||
defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_swap_alpha(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_swap_alpha\n");
|
||||
if(png_ptr == NULL) return;
|
||||
png_ptr->transformations |= PNG_SWAP_ALPHA;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
|
||||
defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_invert_alpha(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_invert_alpha\n");
|
||||
if(png_ptr == NULL) return;
|
||||
png_ptr->transformations |= PNG_INVERT_ALPHA;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_invert_mono(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_set_invert_mono\n");
|
||||
if(png_ptr == NULL) return;
|
||||
png_ptr->transformations |= PNG_INVERT_MONO;
|
||||
}
|
||||
|
||||
/* invert monochrome grayscale data */
|
||||
void /* PRIVATE */
|
||||
png_do_invert(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_invert\n");
|
||||
/* This test removed from libpng version 1.0.13 and 1.2.0:
|
||||
* if (row_info->bit_depth == 1 &&
|
||||
*/
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
if (row == NULL || row_info == NULL)
|
||||
return;
|
||||
#endif
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
|
||||
{
|
||||
png_bytep rp = row;
|
||||
png_uint_32 i;
|
||||
png_uint_32 istop = row_info->rowbytes;
|
||||
|
||||
for (i = 0; i < istop; i++)
|
||||
{
|
||||
*rp = (png_byte)(~(*rp));
|
||||
rp++;
|
||||
}
|
||||
}
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
|
||||
row_info->bit_depth == 8)
|
||||
{
|
||||
png_bytep rp = row;
|
||||
png_uint_32 i;
|
||||
png_uint_32 istop = row_info->rowbytes;
|
||||
|
||||
for (i = 0; i < istop; i+=2)
|
||||
{
|
||||
*rp = (png_byte)(~(*rp));
|
||||
rp+=2;
|
||||
}
|
||||
}
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
|
||||
row_info->bit_depth == 16)
|
||||
{
|
||||
png_bytep rp = row;
|
||||
png_uint_32 i;
|
||||
png_uint_32 istop = row_info->rowbytes;
|
||||
|
||||
for (i = 0; i < istop; i+=4)
|
||||
{
|
||||
*rp = (png_byte)(~(*rp));
|
||||
*(rp+1) = (png_byte)(~(*(rp+1)));
|
||||
rp+=4;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
|
||||
/* swaps byte order on 16 bit depth images */
|
||||
void /* PRIVATE */
|
||||
png_do_swap(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_swap\n");
|
||||
if (
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
row != NULL && row_info != NULL &&
|
||||
#endif
|
||||
row_info->bit_depth == 16)
|
||||
{
|
||||
png_bytep rp = row;
|
||||
png_uint_32 i;
|
||||
png_uint_32 istop= row_info->width * row_info->channels;
|
||||
|
||||
for (i = 0; i < istop; i++, rp += 2)
|
||||
{
|
||||
png_byte t = *rp;
|
||||
*rp = *(rp + 1);
|
||||
*(rp + 1) = t;
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
|
||||
static PNG_CONST png_byte onebppswaptable[256] = {
|
||||
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
|
||||
0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
|
||||
0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
|
||||
0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
|
||||
0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
|
||||
0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
|
||||
0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
|
||||
0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
|
||||
0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
|
||||
0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
|
||||
0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
|
||||
0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
|
||||
0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
|
||||
0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
|
||||
0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
|
||||
0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
|
||||
0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
|
||||
0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
|
||||
0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
|
||||
0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
|
||||
0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
|
||||
0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
|
||||
0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
|
||||
0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
|
||||
0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
|
||||
0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
|
||||
0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
|
||||
0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
|
||||
0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
|
||||
0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
|
||||
0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
|
||||
0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
|
||||
};
|
||||
|
||||
static PNG_CONST png_byte twobppswaptable[256] = {
|
||||
0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0,
|
||||
0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0,
|
||||
0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4,
|
||||
0x24, 0x64, 0xA4, 0xE4, 0x34, 0x74, 0xB4, 0xF4,
|
||||
0x08, 0x48, 0x88, 0xC8, 0x18, 0x58, 0x98, 0xD8,
|
||||
0x28, 0x68, 0xA8, 0xE8, 0x38, 0x78, 0xB8, 0xF8,
|
||||
0x0C, 0x4C, 0x8C, 0xCC, 0x1C, 0x5C, 0x9C, 0xDC,
|
||||
0x2C, 0x6C, 0xAC, 0xEC, 0x3C, 0x7C, 0xBC, 0xFC,
|
||||
0x01, 0x41, 0x81, 0xC1, 0x11, 0x51, 0x91, 0xD1,
|
||||
0x21, 0x61, 0xA1, 0xE1, 0x31, 0x71, 0xB1, 0xF1,
|
||||
0x05, 0x45, 0x85, 0xC5, 0x15, 0x55, 0x95, 0xD5,
|
||||
0x25, 0x65, 0xA5, 0xE5, 0x35, 0x75, 0xB5, 0xF5,
|
||||
0x09, 0x49, 0x89, 0xC9, 0x19, 0x59, 0x99, 0xD9,
|
||||
0x29, 0x69, 0xA9, 0xE9, 0x39, 0x79, 0xB9, 0xF9,
|
||||
0x0D, 0x4D, 0x8D, 0xCD, 0x1D, 0x5D, 0x9D, 0xDD,
|
||||
0x2D, 0x6D, 0xAD, 0xED, 0x3D, 0x7D, 0xBD, 0xFD,
|
||||
0x02, 0x42, 0x82, 0xC2, 0x12, 0x52, 0x92, 0xD2,
|
||||
0x22, 0x62, 0xA2, 0xE2, 0x32, 0x72, 0xB2, 0xF2,
|
||||
0x06, 0x46, 0x86, 0xC6, 0x16, 0x56, 0x96, 0xD6,
|
||||
0x26, 0x66, 0xA6, 0xE6, 0x36, 0x76, 0xB6, 0xF6,
|
||||
0x0A, 0x4A, 0x8A, 0xCA, 0x1A, 0x5A, 0x9A, 0xDA,
|
||||
0x2A, 0x6A, 0xAA, 0xEA, 0x3A, 0x7A, 0xBA, 0xFA,
|
||||
0x0E, 0x4E, 0x8E, 0xCE, 0x1E, 0x5E, 0x9E, 0xDE,
|
||||
0x2E, 0x6E, 0xAE, 0xEE, 0x3E, 0x7E, 0xBE, 0xFE,
|
||||
0x03, 0x43, 0x83, 0xC3, 0x13, 0x53, 0x93, 0xD3,
|
||||
0x23, 0x63, 0xA3, 0xE3, 0x33, 0x73, 0xB3, 0xF3,
|
||||
0x07, 0x47, 0x87, 0xC7, 0x17, 0x57, 0x97, 0xD7,
|
||||
0x27, 0x67, 0xA7, 0xE7, 0x37, 0x77, 0xB7, 0xF7,
|
||||
0x0B, 0x4B, 0x8B, 0xCB, 0x1B, 0x5B, 0x9B, 0xDB,
|
||||
0x2B, 0x6B, 0xAB, 0xEB, 0x3B, 0x7B, 0xBB, 0xFB,
|
||||
0x0F, 0x4F, 0x8F, 0xCF, 0x1F, 0x5F, 0x9F, 0xDF,
|
||||
0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF
|
||||
};
|
||||
|
||||
static PNG_CONST png_byte fourbppswaptable[256] = {
|
||||
0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
|
||||
0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0,
|
||||
0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71,
|
||||
0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1, 0xE1, 0xF1,
|
||||
0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72,
|
||||
0x82, 0x92, 0xA2, 0xB2, 0xC2, 0xD2, 0xE2, 0xF2,
|
||||
0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73,
|
||||
0x83, 0x93, 0xA3, 0xB3, 0xC3, 0xD3, 0xE3, 0xF3,
|
||||
0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74,
|
||||
0x84, 0x94, 0xA4, 0xB4, 0xC4, 0xD4, 0xE4, 0xF4,
|
||||
0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75,
|
||||
0x85, 0x95, 0xA5, 0xB5, 0xC5, 0xD5, 0xE5, 0xF5,
|
||||
0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76,
|
||||
0x86, 0x96, 0xA6, 0xB6, 0xC6, 0xD6, 0xE6, 0xF6,
|
||||
0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77,
|
||||
0x87, 0x97, 0xA7, 0xB7, 0xC7, 0xD7, 0xE7, 0xF7,
|
||||
0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78,
|
||||
0x88, 0x98, 0xA8, 0xB8, 0xC8, 0xD8, 0xE8, 0xF8,
|
||||
0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79,
|
||||
0x89, 0x99, 0xA9, 0xB9, 0xC9, 0xD9, 0xE9, 0xF9,
|
||||
0x0A, 0x1A, 0x2A, 0x3A, 0x4A, 0x5A, 0x6A, 0x7A,
|
||||
0x8A, 0x9A, 0xAA, 0xBA, 0xCA, 0xDA, 0xEA, 0xFA,
|
||||
0x0B, 0x1B, 0x2B, 0x3B, 0x4B, 0x5B, 0x6B, 0x7B,
|
||||
0x8B, 0x9B, 0xAB, 0xBB, 0xCB, 0xDB, 0xEB, 0xFB,
|
||||
0x0C, 0x1C, 0x2C, 0x3C, 0x4C, 0x5C, 0x6C, 0x7C,
|
||||
0x8C, 0x9C, 0xAC, 0xBC, 0xCC, 0xDC, 0xEC, 0xFC,
|
||||
0x0D, 0x1D, 0x2D, 0x3D, 0x4D, 0x5D, 0x6D, 0x7D,
|
||||
0x8D, 0x9D, 0xAD, 0xBD, 0xCD, 0xDD, 0xED, 0xFD,
|
||||
0x0E, 0x1E, 0x2E, 0x3E, 0x4E, 0x5E, 0x6E, 0x7E,
|
||||
0x8E, 0x9E, 0xAE, 0xBE, 0xCE, 0xDE, 0xEE, 0xFE,
|
||||
0x0F, 0x1F, 0x2F, 0x3F, 0x4F, 0x5F, 0x6F, 0x7F,
|
||||
0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF
|
||||
};
|
||||
|
||||
/* swaps pixel packing order within bytes */
|
||||
void /* PRIVATE */
|
||||
png_do_packswap(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_packswap\n");
|
||||
if (
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
row != NULL && row_info != NULL &&
|
||||
#endif
|
||||
row_info->bit_depth < 8)
|
||||
{
|
||||
png_bytep rp, end, table;
|
||||
|
||||
end = row + row_info->rowbytes;
|
||||
|
||||
if (row_info->bit_depth == 1)
|
||||
table = (png_bytep)onebppswaptable;
|
||||
else if (row_info->bit_depth == 2)
|
||||
table = (png_bytep)twobppswaptable;
|
||||
else if (row_info->bit_depth == 4)
|
||||
table = (png_bytep)fourbppswaptable;
|
||||
else
|
||||
return;
|
||||
|
||||
for (rp = row; rp < end; rp++)
|
||||
*rp = table[*rp];
|
||||
}
|
||||
}
|
||||
#endif /* PNG_READ_PACKSWAP_SUPPORTED or PNG_WRITE_PACKSWAP_SUPPORTED */
|
||||
|
||||
#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
|
||||
defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
|
||||
/* remove filler or alpha byte(s) */
|
||||
void /* PRIVATE */
|
||||
png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
|
||||
{
|
||||
png_debug(1, "in png_do_strip_filler\n");
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
if (row != NULL && row_info != NULL)
|
||||
#endif
|
||||
{
|
||||
png_bytep sp=row;
|
||||
png_bytep dp=row;
|
||||
png_uint_32 row_width=row_info->width;
|
||||
png_uint_32 i;
|
||||
|
||||
if ((row_info->color_type == PNG_COLOR_TYPE_RGB ||
|
||||
(row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
|
||||
(flags & PNG_FLAG_STRIP_ALPHA))) &&
|
||||
row_info->channels == 4)
|
||||
{
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
/* This converts from RGBX or RGBA to RGB */
|
||||
if (flags & PNG_FLAG_FILLER_AFTER)
|
||||
{
|
||||
dp+=3; sp+=4;
|
||||
for (i = 1; i < row_width; i++)
|
||||
{
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
sp++;
|
||||
}
|
||||
}
|
||||
/* This converts from XRGB or ARGB to RGB */
|
||||
else
|
||||
{
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
}
|
||||
}
|
||||
row_info->pixel_depth = 24;
|
||||
row_info->rowbytes = row_width * 3;
|
||||
}
|
||||
else /* if (row_info->bit_depth == 16) */
|
||||
{
|
||||
if (flags & PNG_FLAG_FILLER_AFTER)
|
||||
{
|
||||
/* This converts from RRGGBBXX or RRGGBBAA to RRGGBB */
|
||||
sp += 8; dp += 6;
|
||||
for (i = 1; i < row_width; i++)
|
||||
{
|
||||
/* This could be (although png_memcpy is probably slower):
|
||||
png_memcpy(dp, sp, 6);
|
||||
sp += 8;
|
||||
dp += 6;
|
||||
*/
|
||||
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
sp += 2;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* This converts from XXRRGGBB or AARRGGBB to RRGGBB */
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
/* This could be (although png_memcpy is probably slower):
|
||||
png_memcpy(dp, sp, 6);
|
||||
sp += 8;
|
||||
dp += 6;
|
||||
*/
|
||||
|
||||
sp+=2;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
}
|
||||
}
|
||||
row_info->pixel_depth = 48;
|
||||
row_info->rowbytes = row_width * 6;
|
||||
}
|
||||
row_info->channels = 3;
|
||||
}
|
||||
else if ((row_info->color_type == PNG_COLOR_TYPE_GRAY ||
|
||||
(row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
|
||||
(flags & PNG_FLAG_STRIP_ALPHA))) &&
|
||||
row_info->channels == 2)
|
||||
{
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
/* This converts from GX or GA to G */
|
||||
if (flags & PNG_FLAG_FILLER_AFTER)
|
||||
{
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
*dp++ = *sp++;
|
||||
sp++;
|
||||
}
|
||||
}
|
||||
/* This converts from XG or AG to G */
|
||||
else
|
||||
{
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
sp++;
|
||||
*dp++ = *sp++;
|
||||
}
|
||||
}
|
||||
row_info->pixel_depth = 8;
|
||||
row_info->rowbytes = row_width;
|
||||
}
|
||||
else /* if (row_info->bit_depth == 16) */
|
||||
{
|
||||
if (flags & PNG_FLAG_FILLER_AFTER)
|
||||
{
|
||||
/* This converts from GGXX or GGAA to GG */
|
||||
sp += 4; dp += 2;
|
||||
for (i = 1; i < row_width; i++)
|
||||
{
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
sp += 2;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* This converts from XXGG or AAGG to GG */
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
sp += 2;
|
||||
*dp++ = *sp++;
|
||||
*dp++ = *sp++;
|
||||
}
|
||||
}
|
||||
row_info->pixel_depth = 16;
|
||||
row_info->rowbytes = row_width * 2;
|
||||
}
|
||||
row_info->channels = 1;
|
||||
}
|
||||
if (flags & PNG_FLAG_STRIP_ALPHA)
|
||||
row_info->color_type &= ~PNG_COLOR_MASK_ALPHA;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
|
||||
/* swaps red and blue bytes within a pixel */
|
||||
void /* PRIVATE */
|
||||
png_do_bgr(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_bgr\n");
|
||||
if (
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
row != NULL && row_info != NULL &&
|
||||
#endif
|
||||
(row_info->color_type & PNG_COLOR_MASK_COLOR))
|
||||
{
|
||||
png_uint_32 row_width = row_info->width;
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += 3)
|
||||
{
|
||||
png_byte save = *rp;
|
||||
*rp = *(rp + 2);
|
||||
*(rp + 2) = save;
|
||||
}
|
||||
}
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += 4)
|
||||
{
|
||||
png_byte save = *rp;
|
||||
*rp = *(rp + 2);
|
||||
*(rp + 2) = save;
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (row_info->bit_depth == 16)
|
||||
{
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += 6)
|
||||
{
|
||||
png_byte save = *rp;
|
||||
*rp = *(rp + 4);
|
||||
*(rp + 4) = save;
|
||||
save = *(rp + 1);
|
||||
*(rp + 1) = *(rp + 5);
|
||||
*(rp + 5) = save;
|
||||
}
|
||||
}
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += 8)
|
||||
{
|
||||
png_byte save = *rp;
|
||||
*rp = *(rp + 4);
|
||||
*(rp + 4) = save;
|
||||
save = *(rp + 1);
|
||||
*(rp + 1) = *(rp + 5);
|
||||
*(rp + 5) = save;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */
|
||||
|
||||
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
|
||||
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \
|
||||
defined(PNG_LEGACY_SUPPORTED)
|
||||
void PNGAPI
|
||||
png_set_user_transform_info(png_structp png_ptr, png_voidp
|
||||
user_transform_ptr, int user_transform_depth, int user_transform_channels)
|
||||
{
|
||||
png_debug(1, "in png_set_user_transform_info\n");
|
||||
if(png_ptr == NULL) return;
|
||||
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
|
||||
png_ptr->user_transform_ptr = user_transform_ptr;
|
||||
png_ptr->user_transform_depth = (png_byte)user_transform_depth;
|
||||
png_ptr->user_transform_channels = (png_byte)user_transform_channels;
|
||||
#else
|
||||
if(user_transform_ptr || user_transform_depth || user_transform_channels)
|
||||
png_warning(png_ptr,
|
||||
"This version of libpng does not support user transform info");
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
|
||||
/* This function returns a pointer to the user_transform_ptr associated with
|
||||
* the user transform functions. The application should free any memory
|
||||
* associated with this pointer before png_write_destroy and png_read_destroy
|
||||
* are called.
|
||||
*/
|
||||
png_voidp PNGAPI
|
||||
png_get_user_transform_ptr(png_structp png_ptr)
|
||||
{
|
||||
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
|
||||
if (png_ptr == NULL) return (NULL);
|
||||
return ((png_voidp)png_ptr->user_transform_ptr);
|
||||
#else
|
||||
return (NULL);
|
||||
#endif
|
||||
}
|
||||
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
|
||||
@@ -0,0 +1 @@
|
||||
/* pnggvrd.c was removed from libpng-1.2.20. */
|
||||
@@ -0,0 +1,234 @@
|
||||
|
||||
/* pngwio.c - functions for data output
|
||||
*
|
||||
* Last changed in libpng 1.2.13 November 13, 2006
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2006 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.)
|
||||
*
|
||||
* This file provides a location for all output. Users who need
|
||||
* special handling are expected to write functions that have the same
|
||||
* arguments as these and perform similar functions, but that possibly
|
||||
* use different output methods. Note that you shouldn't change these
|
||||
* functions, but rather write replacement functions and then change
|
||||
* them at run time with png_set_write_fn(...).
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
|
||||
/* Write the data to whatever output you are using. The default routine
|
||||
writes to a file pointer. Note that this routine sometimes gets called
|
||||
with very small lengths, so you should implement some kind of simple
|
||||
buffering if you are using unbuffered writes. This should never be asked
|
||||
to write more than 64K on a 16 bit machine. */
|
||||
|
||||
void /* PRIVATE */
|
||||
png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
if (png_ptr->write_data_fn != NULL )
|
||||
(*(png_ptr->write_data_fn))(png_ptr, data, length);
|
||||
else
|
||||
png_error(png_ptr, "Call to NULL write function");
|
||||
}
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
/* This is the function that does the actual writing of data. If you are
|
||||
not writing to a standard C stream, you should create a replacement
|
||||
write_data function and use it at run time with png_set_write_fn(), rather
|
||||
than changing the library. */
|
||||
#ifndef USE_FAR_KEYWORD
|
||||
void PNGAPI
|
||||
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_uint_32 check;
|
||||
|
||||
if(png_ptr == NULL) return;
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
|
||||
check = 0;
|
||||
#else
|
||||
check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
|
||||
#endif
|
||||
if (check != length)
|
||||
png_error(png_ptr, "Write Error");
|
||||
}
|
||||
#else
|
||||
/* this is the model-independent version. Since the standard I/O library
|
||||
can't handle far buffers in the medium and small models, we have to copy
|
||||
the data.
|
||||
*/
|
||||
|
||||
#define NEAR_BUF_SIZE 256
|
||||
#define MIN(a,b) (a <= b ? a : b)
|
||||
|
||||
void PNGAPI
|
||||
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_uint_32 check;
|
||||
png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
|
||||
png_FILE_p io_ptr;
|
||||
|
||||
if(png_ptr == NULL) return;
|
||||
/* Check if data really is near. If so, use usual code. */
|
||||
near_data = (png_byte *)CVT_PTR_NOCHECK(data);
|
||||
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
|
||||
if ((png_bytep)near_data == data)
|
||||
{
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !WriteFile(io_ptr, near_data, length, &check, NULL) )
|
||||
check = 0;
|
||||
#else
|
||||
check = fwrite(near_data, 1, length, io_ptr);
|
||||
#endif
|
||||
}
|
||||
else
|
||||
{
|
||||
png_byte buf[NEAR_BUF_SIZE];
|
||||
png_size_t written, remaining, err;
|
||||
check = 0;
|
||||
remaining = length;
|
||||
do
|
||||
{
|
||||
written = MIN(NEAR_BUF_SIZE, remaining);
|
||||
png_memcpy(buf, data, written); /* copy far buffer to near buffer */
|
||||
#if defined(_WIN32_WCE)
|
||||
if ( !WriteFile(io_ptr, buf, written, &err, NULL) )
|
||||
err = 0;
|
||||
#else
|
||||
err = fwrite(buf, 1, written, io_ptr);
|
||||
#endif
|
||||
if (err != written)
|
||||
break;
|
||||
else
|
||||
check += err;
|
||||
data += written;
|
||||
remaining -= written;
|
||||
}
|
||||
while (remaining != 0);
|
||||
}
|
||||
if (check != length)
|
||||
png_error(png_ptr, "Write Error");
|
||||
}
|
||||
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* This function is called to output any data pending writing (normally
|
||||
to disk). After png_flush is called, there should be no data pending
|
||||
writing in any buffers. */
|
||||
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
|
||||
void /* PRIVATE */
|
||||
png_flush(png_structp png_ptr)
|
||||
{
|
||||
if (png_ptr->output_flush_fn != NULL)
|
||||
(*(png_ptr->output_flush_fn))(png_ptr);
|
||||
}
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
void PNGAPI
|
||||
png_default_flush(png_structp png_ptr)
|
||||
{
|
||||
#if !defined(_WIN32_WCE)
|
||||
png_FILE_p io_ptr;
|
||||
#endif
|
||||
if(png_ptr == NULL) return;
|
||||
#if !defined(_WIN32_WCE)
|
||||
io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
|
||||
if (io_ptr != NULL)
|
||||
fflush(io_ptr);
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* This function allows the application to supply new output functions for
|
||||
libpng if standard C streams aren't being used.
|
||||
|
||||
This function takes as its arguments:
|
||||
png_ptr - pointer to a png output data structure
|
||||
io_ptr - pointer to user supplied structure containing info about
|
||||
the output functions. May be NULL.
|
||||
write_data_fn - pointer to a new output function that takes as its
|
||||
arguments a pointer to a png_struct, a pointer to
|
||||
data to be written, and a 32-bit unsigned int that is
|
||||
the number of bytes to be written. The new write
|
||||
function should call png_error(png_ptr, "Error msg")
|
||||
to exit and output any fatal error messages.
|
||||
flush_data_fn - pointer to a new flush function that takes as its
|
||||
arguments a pointer to a png_struct. After a call to
|
||||
the flush function, there should be no data in any buffers
|
||||
or pending transmission. If the output method doesn't do
|
||||
any buffering of ouput, a function prototype must still be
|
||||
supplied although it doesn't have to do anything. If
|
||||
PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
|
||||
time, output_flush_fn will be ignored, although it must be
|
||||
supplied for compatibility. */
|
||||
void PNGAPI
|
||||
png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
|
||||
png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
|
||||
{
|
||||
if(png_ptr == NULL) return;
|
||||
png_ptr->io_ptr = io_ptr;
|
||||
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
if (write_data_fn != NULL)
|
||||
png_ptr->write_data_fn = write_data_fn;
|
||||
else
|
||||
png_ptr->write_data_fn = png_default_write_data;
|
||||
#else
|
||||
png_ptr->write_data_fn = write_data_fn;
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
|
||||
#if !defined(PNG_NO_STDIO)
|
||||
if (output_flush_fn != NULL)
|
||||
png_ptr->output_flush_fn = output_flush_fn;
|
||||
else
|
||||
png_ptr->output_flush_fn = png_default_flush;
|
||||
#else
|
||||
png_ptr->output_flush_fn = output_flush_fn;
|
||||
#endif
|
||||
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
|
||||
|
||||
/* It is an error to read while writing a png file */
|
||||
if (png_ptr->read_data_fn != NULL)
|
||||
{
|
||||
png_ptr->read_data_fn = NULL;
|
||||
png_warning(png_ptr,
|
||||
"Attempted to set both read_data_fn and write_data_fn in");
|
||||
png_warning(png_ptr,
|
||||
"the same structure. Resetting read_data_fn to NULL.");
|
||||
}
|
||||
}
|
||||
|
||||
#if defined(USE_FAR_KEYWORD)
|
||||
#if defined(_MSC_VER)
|
||||
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
|
||||
{
|
||||
void *near_ptr;
|
||||
void FAR *far_ptr;
|
||||
FP_OFF(near_ptr) = FP_OFF(ptr);
|
||||
far_ptr = (void FAR *)near_ptr;
|
||||
if(check != 0)
|
||||
if(FP_SEG(ptr) != FP_SEG(far_ptr))
|
||||
png_error(png_ptr,"segment lost in conversion");
|
||||
return(near_ptr);
|
||||
}
|
||||
# else
|
||||
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
|
||||
{
|
||||
void *near_ptr;
|
||||
void FAR *far_ptr;
|
||||
near_ptr = (void FAR *)ptr;
|
||||
far_ptr = (void FAR *)near_ptr;
|
||||
if(check != 0)
|
||||
if(far_ptr != ptr)
|
||||
png_error(png_ptr,"segment lost in conversion");
|
||||
return(near_ptr);
|
||||
}
|
||||
# endif
|
||||
# endif
|
||||
#endif /* PNG_WRITE_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,572 @@
|
||||
|
||||
/* pngwtran.c - transforms the data in a row for PNG writers
|
||||
*
|
||||
* Last changed in libpng 1.2.9 April 14, 2006
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1998-2006 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.)
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
#ifdef PNG_WRITE_SUPPORTED
|
||||
|
||||
/* Transform the data according to the user's wishes. The order of
|
||||
* transformations is significant.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_do_write_transformations(png_structp png_ptr)
|
||||
{
|
||||
png_debug(1, "in png_do_write_transformations\n");
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_USER_TRANSFORM)
|
||||
if(png_ptr->write_user_transform_fn != NULL)
|
||||
(*(png_ptr->write_user_transform_fn)) /* user write transform function */
|
||||
(png_ptr, /* png_ptr */
|
||||
&(png_ptr->row_info), /* row_info: */
|
||||
/* png_uint_32 width; width of row */
|
||||
/* png_uint_32 rowbytes; number of bytes in row */
|
||||
/* png_byte color_type; color type of pixels */
|
||||
/* png_byte bit_depth; bit depth of samples */
|
||||
/* png_byte channels; number of channels (1-4) */
|
||||
/* png_byte pixel_depth; bits per pixel (depth*channels) */
|
||||
png_ptr->row_buf + 1); /* start of pixel data for row */
|
||||
#endif
|
||||
#if defined(PNG_WRITE_FILLER_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_FILLER)
|
||||
png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
|
||||
png_ptr->flags);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_PACKSWAP_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_PACKSWAP)
|
||||
png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_PACK_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_PACK)
|
||||
png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1,
|
||||
(png_uint_32)png_ptr->bit_depth);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_SWAP_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_SWAP_BYTES)
|
||||
png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_SHIFT_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_SHIFT)
|
||||
png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1,
|
||||
&(png_ptr->shift));
|
||||
#endif
|
||||
#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_SWAP_ALPHA)
|
||||
png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_INVERT_ALPHA)
|
||||
png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_BGR_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_BGR)
|
||||
png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
#if defined(PNG_WRITE_INVERT_SUPPORTED)
|
||||
if (png_ptr->transformations & PNG_INVERT_MONO)
|
||||
png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
|
||||
#endif
|
||||
}
|
||||
|
||||
#if defined(PNG_WRITE_PACK_SUPPORTED)
|
||||
/* Pack pixels into bytes. Pass the true bit depth in bit_depth. The
|
||||
* row_info bit depth should be 8 (one pixel per byte). The channels
|
||||
* should be 1 (this only happens on grayscale and paletted images).
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
|
||||
{
|
||||
png_debug(1, "in png_do_pack\n");
|
||||
if (row_info->bit_depth == 8 &&
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
row != NULL && row_info != NULL &&
|
||||
#endif
|
||||
row_info->channels == 1)
|
||||
{
|
||||
switch ((int)bit_depth)
|
||||
{
|
||||
case 1:
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
int mask, v;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
sp = row;
|
||||
dp = row;
|
||||
mask = 0x80;
|
||||
v = 0;
|
||||
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
if (*sp != 0)
|
||||
v |= mask;
|
||||
sp++;
|
||||
if (mask > 1)
|
||||
mask >>= 1;
|
||||
else
|
||||
{
|
||||
mask = 0x80;
|
||||
*dp = (png_byte)v;
|
||||
dp++;
|
||||
v = 0;
|
||||
}
|
||||
}
|
||||
if (mask != 0x80)
|
||||
*dp = (png_byte)v;
|
||||
break;
|
||||
}
|
||||
case 2:
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
int shift, v;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
sp = row;
|
||||
dp = row;
|
||||
shift = 6;
|
||||
v = 0;
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
png_byte value;
|
||||
|
||||
value = (png_byte)(*sp & 0x03);
|
||||
v |= (value << shift);
|
||||
if (shift == 0)
|
||||
{
|
||||
shift = 6;
|
||||
*dp = (png_byte)v;
|
||||
dp++;
|
||||
v = 0;
|
||||
}
|
||||
else
|
||||
shift -= 2;
|
||||
sp++;
|
||||
}
|
||||
if (shift != 6)
|
||||
*dp = (png_byte)v;
|
||||
break;
|
||||
}
|
||||
case 4:
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
int shift, v;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
sp = row;
|
||||
dp = row;
|
||||
shift = 4;
|
||||
v = 0;
|
||||
for (i = 0; i < row_width; i++)
|
||||
{
|
||||
png_byte value;
|
||||
|
||||
value = (png_byte)(*sp & 0x0f);
|
||||
v |= (value << shift);
|
||||
|
||||
if (shift == 0)
|
||||
{
|
||||
shift = 4;
|
||||
*dp = (png_byte)v;
|
||||
dp++;
|
||||
v = 0;
|
||||
}
|
||||
else
|
||||
shift -= 4;
|
||||
|
||||
sp++;
|
||||
}
|
||||
if (shift != 4)
|
||||
*dp = (png_byte)v;
|
||||
break;
|
||||
}
|
||||
}
|
||||
row_info->bit_depth = (png_byte)bit_depth;
|
||||
row_info->pixel_depth = (png_byte)(bit_depth * row_info->channels);
|
||||
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
|
||||
row_info->width);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_SHIFT_SUPPORTED)
|
||||
/* Shift pixel values to take advantage of whole range. Pass the
|
||||
* true number of bits in bit_depth. The row should be packed
|
||||
* according to row_info->bit_depth. Thus, if you had a row of
|
||||
* bit depth 4, but the pixels only had values from 0 to 7, you
|
||||
* would pass 3 as bit_depth, and this routine would translate the
|
||||
* data to 0 to 15.
|
||||
*/
|
||||
void /* PRIVATE */
|
||||
png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
|
||||
{
|
||||
png_debug(1, "in png_do_shift\n");
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
if (row != NULL && row_info != NULL &&
|
||||
#else
|
||||
if (
|
||||
#endif
|
||||
row_info->color_type != PNG_COLOR_TYPE_PALETTE)
|
||||
{
|
||||
int shift_start[4], shift_dec[4];
|
||||
int channels = 0;
|
||||
|
||||
if (row_info->color_type & PNG_COLOR_MASK_COLOR)
|
||||
{
|
||||
shift_start[channels] = row_info->bit_depth - bit_depth->red;
|
||||
shift_dec[channels] = bit_depth->red;
|
||||
channels++;
|
||||
shift_start[channels] = row_info->bit_depth - bit_depth->green;
|
||||
shift_dec[channels] = bit_depth->green;
|
||||
channels++;
|
||||
shift_start[channels] = row_info->bit_depth - bit_depth->blue;
|
||||
shift_dec[channels] = bit_depth->blue;
|
||||
channels++;
|
||||
}
|
||||
else
|
||||
{
|
||||
shift_start[channels] = row_info->bit_depth - bit_depth->gray;
|
||||
shift_dec[channels] = bit_depth->gray;
|
||||
channels++;
|
||||
}
|
||||
if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
|
||||
{
|
||||
shift_start[channels] = row_info->bit_depth - bit_depth->alpha;
|
||||
shift_dec[channels] = bit_depth->alpha;
|
||||
channels++;
|
||||
}
|
||||
|
||||
/* with low row depths, could only be grayscale, so one channel */
|
||||
if (row_info->bit_depth < 8)
|
||||
{
|
||||
png_bytep bp = row;
|
||||
png_uint_32 i;
|
||||
png_byte mask;
|
||||
png_uint_32 row_bytes = row_info->rowbytes;
|
||||
|
||||
if (bit_depth->gray == 1 && row_info->bit_depth == 2)
|
||||
mask = 0x55;
|
||||
else if (row_info->bit_depth == 4 && bit_depth->gray == 3)
|
||||
mask = 0x11;
|
||||
else
|
||||
mask = 0xff;
|
||||
|
||||
for (i = 0; i < row_bytes; i++, bp++)
|
||||
{
|
||||
png_uint_16 v;
|
||||
int j;
|
||||
|
||||
v = *bp;
|
||||
*bp = 0;
|
||||
for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0])
|
||||
{
|
||||
if (j > 0)
|
||||
*bp |= (png_byte)((v << j) & 0xff);
|
||||
else
|
||||
*bp |= (png_byte)((v >> (-j)) & mask);
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (row_info->bit_depth == 8)
|
||||
{
|
||||
png_bytep bp = row;
|
||||
png_uint_32 i;
|
||||
png_uint_32 istop = channels * row_info->width;
|
||||
|
||||
for (i = 0; i < istop; i++, bp++)
|
||||
{
|
||||
|
||||
png_uint_16 v;
|
||||
int j;
|
||||
int c = (int)(i%channels);
|
||||
|
||||
v = *bp;
|
||||
*bp = 0;
|
||||
for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
|
||||
{
|
||||
if (j > 0)
|
||||
*bp |= (png_byte)((v << j) & 0xff);
|
||||
else
|
||||
*bp |= (png_byte)((v >> (-j)) & 0xff);
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
png_bytep bp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 istop = channels * row_info->width;
|
||||
|
||||
for (bp = row, i = 0; i < istop; i++)
|
||||
{
|
||||
int c = (int)(i%channels);
|
||||
png_uint_16 value, v;
|
||||
int j;
|
||||
|
||||
v = (png_uint_16)(((png_uint_16)(*bp) << 8) + *(bp + 1));
|
||||
value = 0;
|
||||
for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
|
||||
{
|
||||
if (j > 0)
|
||||
value |= (png_uint_16)((v << j) & (png_uint_16)0xffff);
|
||||
else
|
||||
value |= (png_uint_16)((v >> (-j)) & (png_uint_16)0xffff);
|
||||
}
|
||||
*bp++ = (png_byte)(value >> 8);
|
||||
*bp++ = (png_byte)(value & 0xff);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
|
||||
void /* PRIVATE */
|
||||
png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_write_swap_alpha\n");
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
if (row != NULL && row_info != NULL)
|
||||
#endif
|
||||
{
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
{
|
||||
/* This converts from ARGB to RGBA */
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
png_byte save = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = save;
|
||||
}
|
||||
}
|
||||
/* This converts from AARRGGBB to RRGGBBAA */
|
||||
else
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
png_byte save[2];
|
||||
save[0] = *(sp++);
|
||||
save[1] = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = save[0];
|
||||
*(dp++) = save[1];
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||||
{
|
||||
/* This converts from AG to GA */
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
png_byte save = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = save;
|
||||
}
|
||||
}
|
||||
/* This converts from AAGG to GGAA */
|
||||
else
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
png_byte save[2];
|
||||
save[0] = *(sp++);
|
||||
save[1] = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = save[0];
|
||||
*(dp++) = save[1];
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
|
||||
void /* PRIVATE */
|
||||
png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_write_invert_alpha\n");
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
if (row != NULL && row_info != NULL)
|
||||
#endif
|
||||
{
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
{
|
||||
/* This inverts the alpha channel in RGBA */
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
/* does nothing
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*/
|
||||
sp+=3; dp = sp;
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
/* This inverts the alpha channel in RRGGBBAA */
|
||||
else
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
/* does nothing
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*/
|
||||
sp+=6; dp = sp;
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
}
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||||
{
|
||||
/* This inverts the alpha channel in GA */
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
/* This inverts the alpha channel in GGAA */
|
||||
else
|
||||
{
|
||||
png_bytep sp, dp;
|
||||
png_uint_32 i;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
|
||||
for (i = 0, sp = dp = row; i < row_width; i++)
|
||||
{
|
||||
/* does nothing
|
||||
*(dp++) = *(sp++);
|
||||
*(dp++) = *(sp++);
|
||||
*/
|
||||
sp+=2; dp = sp;
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
*(dp++) = (png_byte)(255 - *(sp++));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(PNG_MNG_FEATURES_SUPPORTED)
|
||||
/* undoes intrapixel differencing */
|
||||
void /* PRIVATE */
|
||||
png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
png_debug(1, "in png_do_write_intrapixel\n");
|
||||
if (
|
||||
#if defined(PNG_USELESS_TESTS_SUPPORTED)
|
||||
row != NULL && row_info != NULL &&
|
||||
#endif
|
||||
(row_info->color_type & PNG_COLOR_MASK_COLOR))
|
||||
{
|
||||
int bytes_per_pixel;
|
||||
png_uint_32 row_width = row_info->width;
|
||||
if (row_info->bit_depth == 8)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
|
||||
bytes_per_pixel = 3;
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
bytes_per_pixel = 4;
|
||||
else
|
||||
return;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
|
||||
{
|
||||
*(rp) = (png_byte)((*rp - *(rp+1))&0xff);
|
||||
*(rp+2) = (png_byte)((*(rp+2) - *(rp+1))&0xff);
|
||||
}
|
||||
}
|
||||
else if (row_info->bit_depth == 16)
|
||||
{
|
||||
png_bytep rp;
|
||||
png_uint_32 i;
|
||||
|
||||
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
|
||||
bytes_per_pixel = 6;
|
||||
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
|
||||
bytes_per_pixel = 8;
|
||||
else
|
||||
return;
|
||||
|
||||
for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
|
||||
{
|
||||
png_uint_32 s0 = (*(rp ) << 8) | *(rp+1);
|
||||
png_uint_32 s1 = (*(rp+2) << 8) | *(rp+3);
|
||||
png_uint_32 s2 = (*(rp+4) << 8) | *(rp+5);
|
||||
png_uint_32 red = (png_uint_32)((s0-s1) & 0xffffL);
|
||||
png_uint_32 blue = (png_uint_32)((s2-s1) & 0xffffL);
|
||||
*(rp ) = (png_byte)((red >> 8) & 0xff);
|
||||
*(rp+1) = (png_byte)(red & 0xff);
|
||||
*(rp+4) = (png_byte)((blue >> 8) & 0xff);
|
||||
*(rp+5) = (png_byte)(blue & 0xff);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif /* PNG_MNG_FEATURES_SUPPORTED */
|
||||
#endif /* PNG_WRITE_SUPPORTED */
|
||||
File diff suppressed because it is too large
Load Diff
Reference in New Issue
Block a user