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/*
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))
#elif defined(__ANDROID__)
if (setjmp((long *)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;
}
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