mirror of
https://github.com/DrBeef/QuakeQuest.git
synced 2024-12-11 21:31:21 +00:00
560 lines
17 KiB
C
560 lines
17 KiB
C
|
/*
|
||
|
Copyright (C) 2006 Serge "(515)" Ziryukin, Forest "LordHavoc" Hale
|
||
|
|
||
|
This program is free software; you can redistribute it and/or
|
||
|
modify it under the terms of the GNU General Public License
|
||
|
as published by the Free Software Foundation; either version 2
|
||
|
of the License, or (at your option) any later version.
|
||
|
|
||
|
This program 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 General Public License for more details.
|
||
|
|
||
|
You should have received a copy of the GNU General Public License
|
||
|
along with this program; if not, write to:
|
||
|
|
||
|
Free Software Foundation, Inc.
|
||
|
59 Temple Place - Suite 330
|
||
|
Boston, MA 02111-1307, USA
|
||
|
|
||
|
*/
|
||
|
|
||
|
//[515]: png implemented into DP ONLY FOR TESTING 2d stuff with csqc
|
||
|
// so delete this bullshit :D
|
||
|
//
|
||
|
//LordHavoc: rewrote most of this.
|
||
|
|
||
|
#include "quakedef.h"
|
||
|
#include "image.h"
|
||
|
#include "image_png.h"
|
||
|
|
||
|
|
||
|
static void (*qpng_set_sig_bytes) (void*, int);
|
||
|
static int (*qpng_sig_cmp) (const unsigned char*, size_t, size_t);
|
||
|
static void* (*qpng_create_read_struct) (const char*, void*, void(*)(void *png, const char *message), void(*)(void *png, const char *message));
|
||
|
static void* (*qpng_create_write_struct) (const char*, void*, void(*)(void *png, const char *message), void(*)(void *png, const char *message));
|
||
|
static void* (*qpng_create_info_struct) (void*);
|
||
|
static void (*qpng_read_info) (void*, void*);
|
||
|
static void (*qpng_set_compression_level) (void*, int);
|
||
|
static void (*qpng_set_filter) (void*, int, int);
|
||
|
static void (*qpng_set_expand) (void*);
|
||
|
static void (*qpng_set_palette_to_rgb) (void*);
|
||
|
static void (*qpng_set_tRNS_to_alpha) (void*);
|
||
|
static void (*qpng_set_gray_to_rgb) (void*);
|
||
|
static void (*qpng_set_filler) (void*, unsigned int, int);
|
||
|
static void (*qpng_set_IHDR) (void*, void*, unsigned long, unsigned long, int, int, int, int, int);
|
||
|
static void (*qpng_set_packing) (void*);
|
||
|
static void (*qpng_set_bgr) (void*);
|
||
|
static int (*qpng_set_interlace_handling) (void*);
|
||
|
static void (*qpng_read_update_info) (void*, void*);
|
||
|
static void (*qpng_read_image) (void*, unsigned char**);
|
||
|
static void (*qpng_read_end) (void*, void*);
|
||
|
static void (*qpng_destroy_read_struct) (void**, void**, void**);
|
||
|
static void (*qpng_destroy_write_struct) (void**, void**);
|
||
|
static void (*qpng_set_read_fn) (void*, void*, void(*)(void *png, unsigned char *data, size_t length));
|
||
|
static void (*qpng_set_write_fn) (void*, void*, void(*)(void *png, unsigned char *data, size_t length), void(*)(void *png));
|
||
|
static unsigned int (*qpng_get_valid) (void*, void*, unsigned int);
|
||
|
static unsigned int (*qpng_get_rowbytes) (void*, void*);
|
||
|
static unsigned char (*qpng_get_channels) (void*, void*);
|
||
|
static unsigned char (*qpng_get_bit_depth) (void*, void*);
|
||
|
static unsigned int (*qpng_get_IHDR) (void*, void*, unsigned long*, unsigned long*, int *, int *, int *, int *, int *);
|
||
|
static unsigned int (*qpng_access_version_number) (void); // FIXME is this return type right? It is a png_uint_32 in libpng
|
||
|
static void (*qpng_write_info) (void*, void*);
|
||
|
static void (*qpng_write_row) (void*, unsigned char*);
|
||
|
static void (*qpng_write_end) (void*, void*);
|
||
|
|
||
|
// libpng 1.4+ longjmp hack
|
||
|
typedef void (*qpng_longjmp_ptr) (jmp_buf, int);
|
||
|
static jmp_buf* (*qpng_set_longjmp_fn) (void *, qpng_longjmp_ptr, size_t);
|
||
|
#define qpng_jmpbuf_14(png_ptr) (*qpng_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf)))
|
||
|
|
||
|
// libpng 1.2 longjmp hack
|
||
|
#define qpng_jmpbuf_12(png_ptr) (*((jmp_buf *) png_ptr))
|
||
|
|
||
|
// all version support
|
||
|
#define qpng_jmpbuf(png_ptr) \
|
||
|
(qpng_set_longjmp_fn ? qpng_jmpbuf_14(png_ptr) : qpng_jmpbuf_12(png_ptr))
|
||
|
|
||
|
static dllfunction_t pngfuncs[] =
|
||
|
{
|
||
|
{"png_set_sig_bytes", (void **) &qpng_set_sig_bytes},
|
||
|
{"png_sig_cmp", (void **) &qpng_sig_cmp},
|
||
|
{"png_create_read_struct", (void **) &qpng_create_read_struct},
|
||
|
{"png_create_write_struct", (void **) &qpng_create_write_struct},
|
||
|
{"png_create_info_struct", (void **) &qpng_create_info_struct},
|
||
|
{"png_read_info", (void **) &qpng_read_info},
|
||
|
{"png_set_compression_level", (void **) &qpng_set_compression_level},
|
||
|
{"png_set_filter", (void **) &qpng_set_filter},
|
||
|
{"png_set_expand", (void **) &qpng_set_expand},
|
||
|
{"png_set_palette_to_rgb", (void **) &qpng_set_palette_to_rgb},
|
||
|
{"png_set_tRNS_to_alpha", (void **) &qpng_set_tRNS_to_alpha},
|
||
|
{"png_set_gray_to_rgb", (void **) &qpng_set_gray_to_rgb},
|
||
|
{"png_set_filler", (void **) &qpng_set_filler},
|
||
|
{"png_set_IHDR", (void **) &qpng_set_IHDR},
|
||
|
{"png_set_packing", (void **) &qpng_set_packing},
|
||
|
{"png_set_bgr", (void **) &qpng_set_bgr},
|
||
|
{"png_set_interlace_handling", (void **) &qpng_set_interlace_handling},
|
||
|
{"png_read_update_info", (void **) &qpng_read_update_info},
|
||
|
{"png_read_image", (void **) &qpng_read_image},
|
||
|
{"png_read_end", (void **) &qpng_read_end},
|
||
|
{"png_destroy_read_struct", (void **) &qpng_destroy_read_struct},
|
||
|
{"png_destroy_write_struct", (void **) &qpng_destroy_write_struct},
|
||
|
{"png_set_read_fn", (void **) &qpng_set_read_fn},
|
||
|
{"png_set_write_fn", (void **) &qpng_set_write_fn},
|
||
|
{"png_get_valid", (void **) &qpng_get_valid},
|
||
|
{"png_get_rowbytes", (void **) &qpng_get_rowbytes},
|
||
|
{"png_get_channels", (void **) &qpng_get_channels},
|
||
|
{"png_get_bit_depth", (void **) &qpng_get_bit_depth},
|
||
|
{"png_get_IHDR", (void **) &qpng_get_IHDR},
|
||
|
{"png_access_version_number", (void **) &qpng_access_version_number},
|
||
|
{"png_write_info", (void **) &qpng_write_info},
|
||
|
{"png_write_row", (void **) &qpng_write_row},
|
||
|
{"png_write_end", (void **) &qpng_write_end},
|
||
|
{NULL, NULL}
|
||
|
};
|
||
|
static dllfunction_t png14funcs[] =
|
||
|
{
|
||
|
{"png_set_longjmp_fn", (void **) &qpng_set_longjmp_fn},
|
||
|
{NULL, NULL}
|
||
|
};
|
||
|
|
||
|
// Handle for PNG DLL
|
||
|
dllhandle_t png_dll = NULL;
|
||
|
dllhandle_t png14_dll = NULL;
|
||
|
|
||
|
|
||
|
/*
|
||
|
=================================================================
|
||
|
|
||
|
DLL load & unload
|
||
|
|
||
|
=================================================================
|
||
|
*/
|
||
|
|
||
|
/*
|
||
|
====================
|
||
|
PNG_OpenLibrary
|
||
|
|
||
|
Try to load the PNG DLL
|
||
|
====================
|
||
|
*/
|
||
|
qboolean PNG_OpenLibrary (void)
|
||
|
{
|
||
|
const char* dllnames [] =
|
||
|
{
|
||
|
#if WIN32
|
||
|
"libpng16.dll",
|
||
|
"libpng16-16.dll",
|
||
|
"libpng15-15.dll",
|
||
|
"libpng15.dll",
|
||
|
"libpng14-14.dll",
|
||
|
"libpng14.dll",
|
||
|
"libpng12.dll",
|
||
|
#elif defined(MACOSX)
|
||
|
"libpng16.16.dylib",
|
||
|
"libpng15.15.dylib",
|
||
|
"libpng14.14.dylib",
|
||
|
"libpng12.0.dylib",
|
||
|
#else
|
||
|
"libpng16.so.16",
|
||
|
"libpng15.so.15", // WTF libtool guidelines anyone?
|
||
|
"libpng14.so.14", // WTF libtool guidelines anyone?
|
||
|
"libpng12.so.0",
|
||
|
"libpng.so", // FreeBSD
|
||
|
#endif
|
||
|
NULL
|
||
|
};
|
||
|
|
||
|
// Already loaded?
|
||
|
if (png_dll)
|
||
|
return true;
|
||
|
|
||
|
// Load the DLL
|
||
|
if(!Sys_LoadLibrary (dllnames, &png_dll, pngfuncs))
|
||
|
return false;
|
||
|
if(qpng_access_version_number() / 100 >= 104)
|
||
|
if(!Sys_LoadLibrary (dllnames, &png14_dll, png14funcs))
|
||
|
{
|
||
|
Sys_UnloadLibrary (&png_dll);
|
||
|
return false;
|
||
|
}
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
====================
|
||
|
PNG_CloseLibrary
|
||
|
|
||
|
Unload the PNG DLL
|
||
|
====================
|
||
|
*/
|
||
|
void PNG_CloseLibrary (void)
|
||
|
{
|
||
|
Sys_UnloadLibrary (&png14_dll);
|
||
|
Sys_UnloadLibrary (&png_dll);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
=================================================================
|
||
|
|
||
|
PNG decompression
|
||
|
|
||
|
=================================================================
|
||
|
*/
|
||
|
|
||
|
#define PNG_LIBPNG_VER_STRING_12 "1.2.4"
|
||
|
#define PNG_LIBPNG_VER_STRING_14 "1.4.0"
|
||
|
#define PNG_LIBPNG_VER_STRING_15 "1.5.0"
|
||
|
#define PNG_LIBPNG_VER_STRING_16 "1.6.0"
|
||
|
|
||
|
#define PNG_COLOR_MASK_PALETTE 1
|
||
|
#define PNG_COLOR_MASK_COLOR 2
|
||
|
#define PNG_COLOR_MASK_ALPHA 4
|
||
|
|
||
|
#define PNG_COLOR_TYPE_GRAY 0
|
||
|
#define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
|
||
|
#define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR)
|
||
|
#define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)
|
||
|
#define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA)
|
||
|
|
||
|
#define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA
|
||
|
#define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA
|
||
|
|
||
|
#define PNG_INFO_tRNS 0x0010
|
||
|
|
||
|
// this struct is only used for status information during loading
|
||
|
static struct
|
||
|
{
|
||
|
const unsigned char *tmpBuf;
|
||
|
int tmpBuflength;
|
||
|
int tmpi;
|
||
|
//int FBgColor;
|
||
|
//int FTransparent;
|
||
|
unsigned int FRowBytes;
|
||
|
//double FGamma;
|
||
|
//double FScreenGamma;
|
||
|
unsigned char **FRowPtrs;
|
||
|
unsigned char *Data;
|
||
|
//char *Title;
|
||
|
//char *Author;
|
||
|
//char *Description;
|
||
|
int BitDepth;
|
||
|
int BytesPerPixel;
|
||
|
int ColorType;
|
||
|
unsigned long Height; // retarded libpng 1.2 pngconf.h uses long (64bit/32bit depending on arch)
|
||
|
unsigned long Width; // retarded libpng 1.2 pngconf.h uses long (64bit/32bit depending on arch)
|
||
|
int Interlace;
|
||
|
int Compression;
|
||
|
int Filter;
|
||
|
//double LastModified;
|
||
|
//int Transparent;
|
||
|
qfile_t *outfile;
|
||
|
} my_png;
|
||
|
|
||
|
//LordHavoc: removed __cdecl prefix, added overrun protection, and rewrote this to be more efficient
|
||
|
static void PNG_fReadData(void *png, unsigned char *data, size_t length)
|
||
|
{
|
||
|
size_t l;
|
||
|
l = my_png.tmpBuflength - my_png.tmpi;
|
||
|
if (l < length)
|
||
|
{
|
||
|
Con_Printf("PNG_fReadData: overrun by %i bytes\n", (int)(length - l));
|
||
|
// a read going past the end of the file, fill in the remaining bytes
|
||
|
// with 0 just to be consistent
|
||
|
memset(data + l, 0, length - l);
|
||
|
length = l;
|
||
|
}
|
||
|
memcpy(data, my_png.tmpBuf + my_png.tmpi, length);
|
||
|
my_png.tmpi += (int)length;
|
||
|
//Com_HexDumpToConsole(data, (int)length);
|
||
|
}
|
||
|
|
||
|
static void PNG_fWriteData(void *png, unsigned char *data, size_t length)
|
||
|
{
|
||
|
FS_Write(my_png.outfile, data, length);
|
||
|
}
|
||
|
|
||
|
static void PNG_fFlushData(void *png)
|
||
|
{
|
||
|
}
|
||
|
|
||
|
static void PNG_error_fn(void *png, const char *message)
|
||
|
{
|
||
|
Con_Printf("PNG_LoadImage: error: %s\n", message);
|
||
|
}
|
||
|
|
||
|
static void PNG_warning_fn(void *png, const char *message)
|
||
|
{
|
||
|
Con_Printf("PNG_LoadImage: warning: %s\n", message);
|
||
|
}
|
||
|
|
||
|
unsigned char *PNG_LoadImage_BGRA (const unsigned char *raw, int filesize, int *miplevel)
|
||
|
{
|
||
|
unsigned int c;
|
||
|
unsigned int y;
|
||
|
void *png, *pnginfo;
|
||
|
unsigned char *imagedata = NULL;
|
||
|
unsigned char ioBuffer[8192];
|
||
|
|
||
|
// FIXME: register an error handler so that abort() won't be called on error
|
||
|
|
||
|
// No DLL = no PNGs
|
||
|
if (!png_dll)
|
||
|
return NULL;
|
||
|
|
||
|
if(qpng_sig_cmp(raw, 0, filesize))
|
||
|
return NULL;
|
||
|
png = (void *)qpng_create_read_struct(
|
||
|
(qpng_access_version_number() / 100 == 102) ? PNG_LIBPNG_VER_STRING_12 :
|
||
|
(qpng_access_version_number() / 100 == 104) ? PNG_LIBPNG_VER_STRING_14 :
|
||
|
(qpng_access_version_number() / 100 == 105) ? PNG_LIBPNG_VER_STRING_15 :
|
||
|
PNG_LIBPNG_VER_STRING_16, // nasty hack... whatever
|
||
|
0, PNG_error_fn, PNG_warning_fn
|
||
|
);
|
||
|
if(!png)
|
||
|
return NULL;
|
||
|
|
||
|
// this must be memset before the setjmp error handler, because it relies
|
||
|
// on the fields in this struct for cleanup
|
||
|
memset(&my_png, 0, sizeof(my_png));
|
||
|
|
||
|
// NOTE: this relies on jmp_buf being the first thing in the png structure
|
||
|
// created by libpng! (this is correct for libpng 1.2.x)
|
||
|
if (setjmp(qpng_jmpbuf(png)))
|
||
|
{
|
||
|
if (my_png.Data)
|
||
|
Mem_Free(my_png.Data);
|
||
|
my_png.Data = NULL;
|
||
|
if (my_png.FRowPtrs)
|
||
|
Mem_Free(my_png.FRowPtrs);
|
||
|
my_png.FRowPtrs = NULL;
|
||
|
qpng_destroy_read_struct(&png, &pnginfo, 0);
|
||
|
return NULL;
|
||
|
}
|
||
|
//
|
||
|
|
||
|
pnginfo = qpng_create_info_struct(png);
|
||
|
if(!pnginfo)
|
||
|
{
|
||
|
qpng_destroy_read_struct(&png, &pnginfo, 0);
|
||
|
return NULL;
|
||
|
}
|
||
|
qpng_set_sig_bytes(png, 0);
|
||
|
|
||
|
my_png.tmpBuf = raw;
|
||
|
my_png.tmpBuflength = filesize;
|
||
|
my_png.tmpi = 0;
|
||
|
//my_png.Data = NULL;
|
||
|
//my_png.FRowPtrs = NULL;
|
||
|
//my_png.Height = 0;
|
||
|
//my_png.Width = 0;
|
||
|
my_png.ColorType = PNG_COLOR_TYPE_RGB;
|
||
|
//my_png.Interlace = 0;
|
||
|
//my_png.Compression = 0;
|
||
|
//my_png.Filter = 0;
|
||
|
qpng_set_read_fn(png, ioBuffer, PNG_fReadData);
|
||
|
qpng_read_info(png, pnginfo);
|
||
|
qpng_get_IHDR(png, pnginfo, &my_png.Width, &my_png.Height,&my_png.BitDepth, &my_png.ColorType, &my_png.Interlace, &my_png.Compression, &my_png.Filter);
|
||
|
|
||
|
// this check guards against pngconf.h with unsigned int *width/height parameters on big endian systems by detecting the strange values and shifting them down 32bits
|
||
|
// (if it's little endian the unwritten bytes are the most significant
|
||
|
// ones and we don't worry about that)
|
||
|
//
|
||
|
// this is only necessary because of retarded 64bit png_uint_32 types in libpng 1.2, which can (conceivably) vary by platform
|
||
|
#if LONG_MAX > 4000000000
|
||
|
if (my_png.Width > LONG_MAX || my_png.Height > LONG_MAX)
|
||
|
{
|
||
|
my_png.Width >>= 32;
|
||
|
my_png.Height >>= 32;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
if (my_png.ColorType == PNG_COLOR_TYPE_PALETTE)
|
||
|
qpng_set_palette_to_rgb(png);
|
||
|
if (my_png.ColorType == PNG_COLOR_TYPE_GRAY || my_png.ColorType == PNG_COLOR_TYPE_GRAY_ALPHA)
|
||
|
qpng_set_gray_to_rgb(png);
|
||
|
if (qpng_get_valid(png, pnginfo, PNG_INFO_tRNS))
|
||
|
qpng_set_tRNS_to_alpha(png);
|
||
|
if (my_png.BitDepth == 8 && !(my_png.ColorType & PNG_COLOR_MASK_ALPHA))
|
||
|
qpng_set_filler(png, 255, 1);
|
||
|
if (( my_png.ColorType == PNG_COLOR_TYPE_GRAY) || (my_png.ColorType == PNG_COLOR_TYPE_GRAY_ALPHA ))
|
||
|
qpng_set_gray_to_rgb(png);
|
||
|
if (my_png.BitDepth < 8)
|
||
|
qpng_set_expand(png);
|
||
|
|
||
|
qpng_read_update_info(png, pnginfo);
|
||
|
|
||
|
my_png.FRowBytes = qpng_get_rowbytes(png, pnginfo);
|
||
|
my_png.BytesPerPixel = qpng_get_channels(png, pnginfo);
|
||
|
|
||
|
my_png.FRowPtrs = (unsigned char **)Mem_Alloc(tempmempool, my_png.Height * sizeof(*my_png.FRowPtrs));
|
||
|
if (my_png.FRowPtrs)
|
||
|
{
|
||
|
imagedata = (unsigned char *)Mem_Alloc(tempmempool, my_png.Height * my_png.FRowBytes);
|
||
|
if(imagedata)
|
||
|
{
|
||
|
my_png.Data = imagedata;
|
||
|
for(y = 0;y < my_png.Height;y++)
|
||
|
my_png.FRowPtrs[y] = my_png.Data + y * my_png.FRowBytes;
|
||
|
qpng_read_image(png, my_png.FRowPtrs);
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
Con_Printf("PNG_LoadImage : not enough memory\n");
|
||
|
qpng_destroy_read_struct(&png, &pnginfo, 0);
|
||
|
Mem_Free(my_png.FRowPtrs);
|
||
|
return NULL;
|
||
|
}
|
||
|
Mem_Free(my_png.FRowPtrs);
|
||
|
my_png.FRowPtrs = NULL;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
Con_Printf("PNG_LoadImage : not enough memory\n");
|
||
|
qpng_destroy_read_struct(&png, &pnginfo, 0);
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
qpng_read_end(png, pnginfo);
|
||
|
qpng_destroy_read_struct(&png, &pnginfo, 0);
|
||
|
|
||
|
image_width = (int)my_png.Width;
|
||
|
image_height = (int)my_png.Height;
|
||
|
|
||
|
if (my_png.BitDepth != 8)
|
||
|
{
|
||
|
Con_Printf ("PNG_LoadImage : bad color depth\n");
|
||
|
Mem_Free(imagedata);
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
// swizzle RGBA to BGRA
|
||
|
for (y = 0;y < (unsigned int)(image_width*image_height*4);y += 4)
|
||
|
{
|
||
|
c = imagedata[y+0];
|
||
|
imagedata[y+0] = imagedata[y+2];
|
||
|
imagedata[y+2] = c;
|
||
|
}
|
||
|
|
||
|
return imagedata;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
=================================================================
|
||
|
|
||
|
PNG compression
|
||
|
|
||
|
=================================================================
|
||
|
*/
|
||
|
|
||
|
#define Z_BEST_SPEED 1
|
||
|
#define Z_BEST_COMPRESSION 9
|
||
|
#define PNG_INTERLACE_NONE 0
|
||
|
#define PNG_INTERLACE_ADAM7 1
|
||
|
#define PNG_FILTER_TYPE_BASE 0
|
||
|
#define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE
|
||
|
#define PNG_COMPRESSION_TYPE_BASE 0
|
||
|
#define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE
|
||
|
#define PNG_NO_FILTERS 0x00
|
||
|
#define PNG_FILTER_NONE 0x08
|
||
|
#define PNG_FILTER_SUB 0x10
|
||
|
#define PNG_FILTER_UP 0x20
|
||
|
#define PNG_FILTER_AVG 0x40
|
||
|
#define PNG_FILTER_PAETH 0x80
|
||
|
#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \
|
||
|
PNG_FILTER_AVG | PNG_FILTER_PAETH)
|
||
|
|
||
|
/*
|
||
|
====================
|
||
|
PNG_SaveImage_preflipped
|
||
|
|
||
|
Save a preflipped PNG image to a file
|
||
|
====================
|
||
|
*/
|
||
|
qboolean PNG_SaveImage_preflipped (const char *filename, int width, int height, qboolean has_alpha, unsigned char *data)
|
||
|
{
|
||
|
unsigned int offset, linesize;
|
||
|
qfile_t* file = NULL;
|
||
|
void *png, *pnginfo;
|
||
|
unsigned char ioBuffer[8192];
|
||
|
int passes, i, j;
|
||
|
|
||
|
// No DLL = no JPEGs
|
||
|
if (!png_dll)
|
||
|
{
|
||
|
Con_Print("You need the libpng library to save PNG images\n");
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
png = (void *)qpng_create_write_struct(
|
||
|
(qpng_access_version_number() / 100 == 102) ? PNG_LIBPNG_VER_STRING_12 :
|
||
|
(qpng_access_version_number() / 100 == 104) ? PNG_LIBPNG_VER_STRING_14 :
|
||
|
(qpng_access_version_number() / 100 == 105) ? PNG_LIBPNG_VER_STRING_15 :
|
||
|
PNG_LIBPNG_VER_STRING_16, // nasty hack... whatever
|
||
|
0, PNG_error_fn, PNG_warning_fn
|
||
|
);
|
||
|
if(!png)
|
||
|
return false;
|
||
|
pnginfo = (void *)qpng_create_info_struct(png);
|
||
|
if(!pnginfo)
|
||
|
{
|
||
|
qpng_destroy_write_struct(&png, NULL);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
// this must be memset before the setjmp error handler, because it relies
|
||
|
// on the fields in this struct for cleanup
|
||
|
memset(&my_png, 0, sizeof(my_png));
|
||
|
|
||
|
// NOTE: this relies on jmp_buf being the first thing in the png structure
|
||
|
// created by libpng! (this is correct for libpng 1.2.x)
|
||
|
#ifdef __cplusplus
|
||
|
#ifdef WIN64
|
||
|
if (setjmp((_JBTYPE *)png))
|
||
|
#elif defined(MACOSX) || defined(WIN32)
|
||
|
if (setjmp((int *)png))
|
||
|
#else
|
||
|
if (setjmp((__jmp_buf_tag *)png))
|
||
|
#endif
|
||
|
#else
|
||
|
if (setjmp(png))
|
||
|
#endif
|
||
|
{
|
||
|
qpng_destroy_write_struct(&png, &pnginfo);
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
// Open the file
|
||
|
file = FS_OpenRealFile(filename, "wb", true);
|
||
|
if (!file)
|
||
|
return false;
|
||
|
my_png.outfile = file;
|
||
|
qpng_set_write_fn(png, ioBuffer, PNG_fWriteData, PNG_fFlushData);
|
||
|
|
||
|
//qpng_set_compression_level(png, Z_BEST_COMPRESSION);
|
||
|
qpng_set_compression_level(png, Z_BEST_SPEED);
|
||
|
qpng_set_IHDR(png, pnginfo, width, height, 8, has_alpha ? PNG_COLOR_TYPE_RGB_ALPHA : PNG_COLOR_TYPE_RGB, PNG_INTERLACE_ADAM7, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
|
||
|
qpng_set_filter(png, 0, PNG_NO_FILTERS);
|
||
|
qpng_write_info(png, pnginfo);
|
||
|
qpng_set_packing(png);
|
||
|
qpng_set_bgr(png);
|
||
|
|
||
|
passes = qpng_set_interlace_handling(png);
|
||
|
|
||
|
linesize = width * (has_alpha ? 4 : 3);
|
||
|
offset = linesize * (height - 1);
|
||
|
for(i = 0; i < passes; ++i)
|
||
|
for(j = 0; j < height; ++j)
|
||
|
qpng_write_row(png, &data[offset - j * linesize]);
|
||
|
|
||
|
qpng_write_end(png, NULL);
|
||
|
qpng_destroy_write_struct(&png, &pnginfo);
|
||
|
|
||
|
FS_Close (file);
|
||
|
|
||
|
return true;
|
||
|
}
|