2 Copyright (C) 2006 Serge "(515)" Ziryukin, Forest "LordHavoc" Hale
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 See the GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to:
18 Free Software Foundation, Inc.
19 59 Temple Place - Suite 330
20 Boston, MA 02111-1307, USA
24 //[515]: png implemented into DP ONLY FOR TESTING 2d stuff with csqc
25 // so delete this bullshit :D
27 //LordHavoc: rewrote most of this.
31 #include "image_png.h"
33 static void (*qpng_set_sig_bytes) (void*, int);
34 static int (*qpng_sig_cmp) (const unsigned char*, size_t, size_t);
35 static void* (*qpng_create_read_struct) (const char*, void*, void(*)(void *png, const char *message), void(*)(void *png, const char *message));
36 static void* (*qpng_create_write_struct) (const char*, void*, void(*)(void *png, const char *message), void(*)(void *png, const char *message));
37 static void* (*qpng_create_info_struct) (void*);
38 static void (*qpng_read_info) (void*, void*);
39 static void (*qpng_set_compression_level) (void*, int);
40 static void (*qpng_set_filter) (void*, int, int);
41 static void (*qpng_set_expand) (void*);
42 static void (*qpng_set_palette_to_rgb) (void*);
43 static void (*qpng_set_tRNS_to_alpha) (void*);
44 static void (*qpng_set_gray_to_rgb) (void*);
45 static void (*qpng_set_filler) (void*, unsigned int, int);
46 static void (*qpng_set_IHDR) (void*, void*, unsigned long, unsigned long, int, int, int, int, int);
47 static void (*qpng_set_packing) (void*);
48 static void (*qpng_set_bgr) (void*);
49 static int (*qpng_set_interlace_handling) (void*);
50 static void (*qpng_read_update_info) (void*, void*);
51 static void (*qpng_read_image) (void*, unsigned char**);
52 static void (*qpng_read_end) (void*, void*);
53 static void (*qpng_destroy_read_struct) (void**, void**, void**);
54 static void (*qpng_destroy_write_struct) (void**, void**);
55 static void (*qpng_set_read_fn) (void*, void*, void(*)(void *png, unsigned char *data, size_t length));
56 static void (*qpng_set_write_fn) (void*, void*, void(*)(void *png, unsigned char *data, size_t length), void(*)(void *png));
57 static unsigned int (*qpng_get_valid) (void*, void*, unsigned int);
58 static unsigned int (*qpng_get_rowbytes) (void*, void*);
59 static unsigned char (*qpng_get_channels) (void*, void*);
60 static unsigned char (*qpng_get_bit_depth) (void*, void*);
61 static unsigned int (*qpng_get_IHDR) (void*, void*, unsigned long*, unsigned long*, int *, int *, int *, int *, int *);
62 static char* (*qpng_get_libpng_ver) (void*);
63 static void (*qpng_write_info) (void*, void*);
64 static void (*qpng_write_row) (void*, unsigned char*);
65 static void (*qpng_write_end) (void*, void*);
67 static dllfunction_t pngfuncs[] =
69 {"png_set_sig_bytes", (void **) &qpng_set_sig_bytes},
70 {"png_sig_cmp", (void **) &qpng_sig_cmp},
71 {"png_create_read_struct", (void **) &qpng_create_read_struct},
72 {"png_create_write_struct", (void **) &qpng_create_write_struct},
73 {"png_create_info_struct", (void **) &qpng_create_info_struct},
74 {"png_read_info", (void **) &qpng_read_info},
75 {"png_set_compression_level", (void **) &qpng_set_compression_level},
76 {"png_set_filter", (void **) &qpng_set_filter},
77 {"png_set_expand", (void **) &qpng_set_expand},
78 {"png_set_palette_to_rgb", (void **) &qpng_set_palette_to_rgb},
79 {"png_set_tRNS_to_alpha", (void **) &qpng_set_tRNS_to_alpha},
80 {"png_set_gray_to_rgb", (void **) &qpng_set_gray_to_rgb},
81 {"png_set_filler", (void **) &qpng_set_filler},
82 {"png_set_IHDR", (void **) &qpng_set_IHDR},
83 {"png_set_packing", (void **) &qpng_set_packing},
84 {"png_set_bgr", (void **) &qpng_set_bgr},
85 {"png_set_interlace_handling", (void **) &qpng_set_interlace_handling},
86 {"png_read_update_info", (void **) &qpng_read_update_info},
87 {"png_read_image", (void **) &qpng_read_image},
88 {"png_read_end", (void **) &qpng_read_end},
89 {"png_destroy_read_struct", (void **) &qpng_destroy_read_struct},
90 {"png_destroy_write_struct", (void **) &qpng_destroy_write_struct},
91 {"png_set_read_fn", (void **) &qpng_set_read_fn},
92 {"png_set_write_fn", (void **) &qpng_set_write_fn},
93 {"png_get_valid", (void **) &qpng_get_valid},
94 {"png_get_rowbytes", (void **) &qpng_get_rowbytes},
95 {"png_get_channels", (void **) &qpng_get_channels},
96 {"png_get_bit_depth", (void **) &qpng_get_bit_depth},
97 {"png_get_IHDR", (void **) &qpng_get_IHDR},
98 {"png_get_libpng_ver", (void **) &qpng_get_libpng_ver},
99 {"png_write_info", (void **) &qpng_write_info},
100 {"png_write_row", (void **) &qpng_write_row},
101 {"png_write_end", (void **) &qpng_write_end},
105 // Handle for PNG DLL
106 dllhandle_t png_dll = NULL;
110 =================================================================
114 =================================================================
121 Try to load the PNG DLL
124 qboolean PNG_OpenLibrary (void)
126 const char* dllnames [] =
130 #elif defined(MACOSX)
134 "libpng.so", // FreeBSD
144 return Sys_LoadLibrary (dllnames, &png_dll, pngfuncs);
155 void PNG_CloseLibrary (void)
157 Sys_UnloadLibrary (&png_dll);
161 =================================================================
165 =================================================================
168 #define PNG_LIBPNG_VER_STRING "1.2.4"
170 #define PNG_COLOR_MASK_PALETTE 1
171 #define PNG_COLOR_MASK_COLOR 2
172 #define PNG_COLOR_MASK_ALPHA 4
174 #define PNG_COLOR_TYPE_GRAY 0
175 #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
176 #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR)
177 #define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)
178 #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA)
180 #define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA
181 #define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA
183 #define PNG_INFO_tRNS 0x0010
185 // this struct is only used for status information during loading
188 const unsigned char *tmpBuf;
193 unsigned int FRowBytes;
195 //double FScreenGamma;
196 unsigned char **FRowPtrs;
204 unsigned long Height; // retarded libpng 1.2 pngconf.h uses long (64bit/32bit depending on arch)
205 unsigned long Width; // retarded libpng 1.2 pngconf.h uses long (64bit/32bit depending on arch)
209 //double LastModified;
214 //LordHavoc: removed __cdecl prefix, added overrun protection, and rewrote this to be more efficient
215 void PNG_fReadData(void *png, unsigned char *data, size_t length)
218 l = my_png.tmpBuflength - my_png.tmpi;
221 Con_Printf("PNG_fReadData: overrun by %i bytes\n", (int)(length - l));
222 // a read going past the end of the file, fill in the remaining bytes
223 // with 0 just to be consistent
224 memset(data + l, 0, length - l);
227 memcpy(data, my_png.tmpBuf + my_png.tmpi, length);
228 my_png.tmpi += (int)length;
229 //Com_HexDumpToConsole(data, (int)length);
232 void PNG_fWriteData(void *png, unsigned char *data, size_t length)
234 FS_Write(my_png.outfile, data, length);
237 void PNG_fFlushData(void *png)
241 void PNG_error_fn(void *png, const char *message)
243 Con_Printf("PNG_LoadImage: error: %s\n", message);
246 void PNG_warning_fn(void *png, const char *message)
248 Con_Printf("PNG_LoadImage: warning: %s\n", message);
251 extern int image_width;
252 extern int image_height;
254 unsigned char *PNG_LoadImage_BGRA (const unsigned char *raw, int filesize)
259 unsigned char *imagedata = NULL;
260 unsigned char ioBuffer[8192];
262 // FIXME: register an error handler so that abort() won't be called on error
268 if(qpng_sig_cmp(raw, 0, filesize))
270 png = (void *)qpng_create_read_struct(PNG_LIBPNG_VER_STRING, 0, PNG_error_fn, PNG_warning_fn);
274 // this must be memset before the setjmp error handler, because it relies
275 // on the fields in this struct for cleanup
276 memset(&my_png, 0, sizeof(my_png));
278 // NOTE: this relies on jmp_buf being the first thing in the png structure
279 // created by libpng! (this is correct for libpng 1.2.x)
281 #if defined(MACOSX) || defined(WIN32)
282 if (setjmp((int *)png))
284 if (setjmp((__jmp_buf_tag *)png))
291 Mem_Free(my_png.Data);
294 Mem_Free(my_png.FRowPtrs);
295 my_png.FRowPtrs = NULL;
296 qpng_destroy_read_struct(&png, &pnginfo, 0);
301 pnginfo = qpng_create_info_struct(png);
304 qpng_destroy_read_struct(&png, &pnginfo, 0);
307 qpng_set_sig_bytes(png, 0);
310 my_png.tmpBuflength = filesize;
312 //my_png.Data = NULL;
313 //my_png.FRowPtrs = NULL;
316 my_png.ColorType = PNG_COLOR_TYPE_RGB;
317 //my_png.Interlace = 0;
318 //my_png.Compression = 0;
320 qpng_set_read_fn(png, ioBuffer, PNG_fReadData);
321 qpng_read_info(png, pnginfo);
322 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);
324 // 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
325 // (if it's little endian the unwritten bytes are the most significant
326 // ones and we don't worry about that)
328 // this is only necessary because of retarded 64bit png_uint_32 types in libpng 1.2, which can (conceivably) vary by platform
329 #if LONG_MAX > 4000000000
330 if (my_png.Width > LONG_MAX || my_png.Height > LONG_MAX)
333 my_png.Height >>= 32;
337 if (my_png.ColorType == PNG_COLOR_TYPE_PALETTE)
338 qpng_set_palette_to_rgb(png);
339 if (my_png.ColorType == PNG_COLOR_TYPE_GRAY || my_png.ColorType == PNG_COLOR_TYPE_GRAY_ALPHA)
340 qpng_set_gray_to_rgb(png);
341 if (qpng_get_valid(png, pnginfo, PNG_INFO_tRNS))
342 qpng_set_tRNS_to_alpha(png);
343 if (my_png.BitDepth == 8 && !(my_png.ColorType & PNG_COLOR_MASK_ALPHA))
344 qpng_set_filler(png, 255, 1);
345 if (( my_png.ColorType == PNG_COLOR_TYPE_GRAY) || (my_png.ColorType == PNG_COLOR_TYPE_GRAY_ALPHA ))
346 qpng_set_gray_to_rgb(png);
347 if (my_png.BitDepth < 8)
348 qpng_set_expand(png);
350 qpng_read_update_info(png, pnginfo);
352 my_png.FRowBytes = qpng_get_rowbytes(png, pnginfo);
353 my_png.BytesPerPixel = qpng_get_channels(png, pnginfo);
355 my_png.FRowPtrs = (unsigned char **)Mem_Alloc(tempmempool, my_png.Height * sizeof(*my_png.FRowPtrs));
358 imagedata = (unsigned char *)Mem_Alloc(tempmempool, my_png.Height * my_png.FRowBytes);
361 my_png.Data = imagedata;
362 for(y = 0;y < my_png.Height;y++)
363 my_png.FRowPtrs[y] = my_png.Data + y * my_png.FRowBytes;
364 qpng_read_image(png, my_png.FRowPtrs);
368 Con_Printf("PNG_LoadImage : not enough memory\n");
369 qpng_destroy_read_struct(&png, &pnginfo, 0);
370 Mem_Free(my_png.FRowPtrs);
373 Mem_Free(my_png.FRowPtrs);
374 my_png.FRowPtrs = NULL;
378 Con_Printf("PNG_LoadImage : not enough memory\n");
379 qpng_destroy_read_struct(&png, &pnginfo, 0);
383 qpng_read_end(png, pnginfo);
384 qpng_destroy_read_struct(&png, &pnginfo, 0);
386 image_width = (int)my_png.Width;
387 image_height = (int)my_png.Height;
389 if (my_png.BitDepth != 8)
391 Con_Printf ("PNG_LoadImage : bad color depth\n");
396 // swizzle RGBA to BGRA
397 for (y = 0;y < (unsigned int)(image_width*image_height*4);y += 4)
400 imagedata[y+0] = imagedata[y+2];
408 =================================================================
412 =================================================================
415 #define Z_BEST_SPEED 1
416 #define Z_BEST_COMPRESSION 9
417 #define PNG_INTERLACE_NONE 0
418 #define PNG_INTERLACE_ADAM7 1
419 #define PNG_FILTER_TYPE_BASE 0
420 #define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE
421 #define PNG_COMPRESSION_TYPE_BASE 0
422 #define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE
423 #define PNG_NO_FILTERS 0x00
424 #define PNG_FILTER_NONE 0x08
425 #define PNG_FILTER_SUB 0x10
426 #define PNG_FILTER_UP 0x20
427 #define PNG_FILTER_AVG 0x40
428 #define PNG_FILTER_PAETH 0x80
429 #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \
430 PNG_FILTER_AVG | PNG_FILTER_PAETH)
434 PNG_SaveImage_preflipped
436 Save a preflipped PNG image to a file
439 qboolean PNG_SaveImage_preflipped (const char *filename, int width, int height, qboolean has_alpha, unsigned char *data)
441 unsigned int offset, linesize;
442 qfile_t* file = NULL;
444 unsigned char ioBuffer[8192];
450 Con_Print("You need the libpng library to save PNG images\n");
454 png = (void *)qpng_create_write_struct(PNG_LIBPNG_VER_STRING, 0, PNG_error_fn, PNG_warning_fn);
457 pnginfo = (void *)qpng_create_info_struct(png);
460 qpng_destroy_write_struct(&png, NULL);
464 // this must be memset before the setjmp error handler, because it relies
465 // on the fields in this struct for cleanup
466 memset(&my_png, 0, sizeof(my_png));
468 // NOTE: this relies on jmp_buf being the first thing in the png structure
469 // created by libpng! (this is correct for libpng 1.2.x)
471 #if defined(MACOSX) || defined(WIN32)
472 if (setjmp((int *)png))
474 if (setjmp((__jmp_buf_tag *)png))
480 qpng_destroy_write_struct(&png, &pnginfo);
485 file = FS_OpenRealFile(filename, "wb", true);
488 my_png.outfile = file;
489 qpng_set_write_fn(png, ioBuffer, PNG_fWriteData, PNG_fFlushData);
491 //qpng_set_compression_level(png, Z_BEST_COMPRESSION);
492 qpng_set_compression_level(png, Z_BEST_SPEED);
493 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);
494 qpng_set_filter(png, 0, PNG_NO_FILTERS);
495 qpng_write_info(png, pnginfo);
496 qpng_set_packing(png);
499 passes = qpng_set_interlace_handling(png);
501 linesize = width * (has_alpha ? 4 : 3);
502 offset = linesize * (height - 1);
503 for(i = 0; i < passes; ++i)
504 for(j = 0; j < height; ++j)
505 qpng_write_row(png, &data[offset - j * linesize]);
507 qpng_write_end(png, NULL);
508 qpng_destroy_write_struct(&png, &pnginfo);