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_gray_1_2_4_to_8) (void*);
43 static void (*qpng_set_palette_to_rgb) (void*);
44 static void (*qpng_set_tRNS_to_alpha) (void*);
45 static void (*qpng_set_gray_to_rgb) (void*);
46 static void (*qpng_set_filler) (void*, unsigned int, int);
47 static void (*qpng_set_IHDR) (void*, void*, unsigned long, unsigned long, int, int, int, int, int);
48 static void (*qpng_set_packing) (void*);
49 static void (*qpng_set_bgr) (void*);
50 static int (*qpng_set_interlace_handling) (void*);
51 static void (*qpng_read_update_info) (void*, void*);
52 static void (*qpng_read_image) (void*, unsigned char**);
53 static void (*qpng_read_end) (void*, void*);
54 static void (*qpng_destroy_read_struct) (void**, void**, void**);
55 static void (*qpng_destroy_write_struct) (void**, void**);
56 static void (*qpng_set_read_fn) (void*, void*, void(*)(void *png, unsigned char *data, size_t length));
57 static void (*qpng_set_write_fn) (void*, void*, void(*)(void *png, unsigned char *data, size_t length), void(*)(void *png));
58 static unsigned int (*qpng_get_valid) (void*, void*, unsigned int);
59 static unsigned int (*qpng_get_rowbytes) (void*, void*);
60 static unsigned char (*qpng_get_channels) (void*, void*);
61 static unsigned char (*qpng_get_bit_depth) (void*, void*);
62 static unsigned int (*qpng_get_IHDR) (void*, void*, unsigned long*, unsigned long*, int *, int *, int *, int *, int *);
63 static char* (*qpng_get_libpng_ver) (void*);
64 static void (*qpng_write_info) (void*, void*);
65 static void (*qpng_write_row) (void*, unsigned char*);
66 static void (*qpng_write_end) (void*, void*);
68 static dllfunction_t pngfuncs[] =
70 {"png_set_sig_bytes", (void **) &qpng_set_sig_bytes},
71 {"png_sig_cmp", (void **) &qpng_sig_cmp},
72 {"png_create_read_struct", (void **) &qpng_create_read_struct},
73 {"png_create_write_struct", (void **) &qpng_create_write_struct},
74 {"png_create_info_struct", (void **) &qpng_create_info_struct},
75 {"png_read_info", (void **) &qpng_read_info},
76 {"png_set_compression_level", (void **) &qpng_set_compression_level},
77 {"png_set_filter", (void **) &qpng_set_filter},
78 {"png_set_expand", (void **) &qpng_set_expand},
79 {"png_set_gray_1_2_4_to_8", (void **) &qpng_set_gray_1_2_4_to_8},
80 {"png_set_palette_to_rgb", (void **) &qpng_set_palette_to_rgb},
81 {"png_set_tRNS_to_alpha", (void **) &qpng_set_tRNS_to_alpha},
82 {"png_set_gray_to_rgb", (void **) &qpng_set_gray_to_rgb},
83 {"png_set_filler", (void **) &qpng_set_filler},
84 {"png_set_IHDR", (void **) &qpng_set_IHDR},
85 {"png_set_packing", (void **) &qpng_set_packing},
86 {"png_set_bgr", (void **) &qpng_set_bgr},
87 {"png_set_interlace_handling", (void **) &qpng_set_interlace_handling},
88 {"png_read_update_info", (void **) &qpng_read_update_info},
89 {"png_read_image", (void **) &qpng_read_image},
90 {"png_read_end", (void **) &qpng_read_end},
91 {"png_destroy_read_struct", (void **) &qpng_destroy_read_struct},
92 {"png_destroy_write_struct", (void **) &qpng_destroy_write_struct},
93 {"png_set_read_fn", (void **) &qpng_set_read_fn},
94 {"png_set_write_fn", (void **) &qpng_set_write_fn},
95 {"png_get_valid", (void **) &qpng_get_valid},
96 {"png_get_rowbytes", (void **) &qpng_get_rowbytes},
97 {"png_get_channels", (void **) &qpng_get_channels},
98 {"png_get_bit_depth", (void **) &qpng_get_bit_depth},
99 {"png_get_IHDR", (void **) &qpng_get_IHDR},
100 {"png_get_libpng_ver", (void **) &qpng_get_libpng_ver},
101 {"png_write_info", (void **) &qpng_write_info},
102 {"png_write_row", (void **) &qpng_write_row},
103 {"png_write_end", (void **) &qpng_write_end},
107 // Handle for PNG DLL
108 dllhandle_t png_dll = NULL;
112 =================================================================
116 =================================================================
123 Try to load the PNG DLL
126 qboolean PNG_OpenLibrary (void)
128 const char* dllnames [] =
132 #elif defined(MACOSX)
136 "libpng.so", // FreeBSD
146 return Sys_LoadLibrary (dllnames, &png_dll, pngfuncs);
157 void PNG_CloseLibrary (void)
159 Sys_UnloadLibrary (&png_dll);
163 =================================================================
167 =================================================================
170 #define PNG_LIBPNG_VER_STRING "1.2.4"
172 #define PNG_COLOR_MASK_PALETTE 1
173 #define PNG_COLOR_MASK_COLOR 2
174 #define PNG_COLOR_MASK_ALPHA 4
176 #define PNG_COLOR_TYPE_GRAY 0
177 #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
178 #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR)
179 #define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)
180 #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA)
182 #define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA
183 #define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA
185 #define PNG_INFO_tRNS 0x0010
187 // this struct is only used for status information during loading
190 const unsigned char *tmpBuf;
195 unsigned int FRowBytes;
197 //double FScreenGamma;
198 unsigned char **FRowPtrs;
206 unsigned long Height; // retarded libpng 1.2 pngconf.h uses long (64bit/32bit depending on arch)
207 unsigned long Width; // retarded libpng 1.2 pngconf.h uses long (64bit/32bit depending on arch)
211 //double LastModified;
216 //LordHavoc: removed __cdecl prefix, added overrun protection, and rewrote this to be more efficient
217 void PNG_fReadData(void *png, unsigned char *data, size_t length)
220 l = my_png.tmpBuflength - my_png.tmpi;
223 Con_Printf("PNG_fReadData: overrun by %i bytes\n", (int)(length - l));
224 // a read going past the end of the file, fill in the remaining bytes
225 // with 0 just to be consistent
226 memset(data + l, 0, length - l);
229 memcpy(data, my_png.tmpBuf + my_png.tmpi, length);
230 my_png.tmpi += (int)length;
231 //Com_HexDumpToConsole(data, (int)length);
234 void PNG_fWriteData(void *png, unsigned char *data, size_t length)
236 FS_Write(my_png.outfile, data, length);
239 void PNG_fFlushData(void *png)
243 void PNG_error_fn(void *png, const char *message)
245 Con_Printf("PNG_LoadImage: error: %s\n", message);
248 void PNG_warning_fn(void *png, const char *message)
250 Con_Printf("PNG_LoadImage: warning: %s\n", message);
253 extern int image_width;
254 extern int image_height;
256 unsigned char *PNG_LoadImage_BGRA (const unsigned char *raw, int filesize)
261 unsigned char *imagedata = NULL;
262 unsigned char ioBuffer[8192];
264 // FIXME: register an error handler so that abort() won't be called on error
270 if(qpng_sig_cmp(raw, 0, filesize))
272 png = (void *)qpng_create_read_struct(PNG_LIBPNG_VER_STRING, 0, PNG_error_fn, PNG_warning_fn);
276 // this must be memset before the setjmp error handler, because it relies
277 // on the fields in this struct for cleanup
278 memset(&my_png, 0, sizeof(my_png));
280 // NOTE: this relies on jmp_buf being the first thing in the png structure
281 // created by libpng! (this is correct for libpng 1.2.x)
283 #if defined(MACOSX) || defined(WIN32)
284 if (setjmp((int *)png))
286 if (setjmp((__jmp_buf_tag *)png))
293 Mem_Free(my_png.Data);
296 Mem_Free(my_png.FRowPtrs);
297 my_png.FRowPtrs = NULL;
298 qpng_destroy_read_struct(&png, &pnginfo, 0);
303 pnginfo = qpng_create_info_struct(png);
306 qpng_destroy_read_struct(&png, &pnginfo, 0);
309 qpng_set_sig_bytes(png, 0);
312 my_png.tmpBuflength = filesize;
314 //my_png.Data = NULL;
315 //my_png.FRowPtrs = NULL;
318 my_png.ColorType = PNG_COLOR_TYPE_RGB;
319 //my_png.Interlace = 0;
320 //my_png.Compression = 0;
322 qpng_set_read_fn(png, ioBuffer, PNG_fReadData);
323 qpng_read_info(png, pnginfo);
324 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);
326 // 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
327 // (if it's little endian the unwritten bytes are the most significant
328 // ones and we don't worry about that)
330 // this is only necessary because of retarded 64bit png_uint_32 types in libpng 1.2, which can (conceivably) vary by platform
331 #if LONG_MAX > 4000000000
332 if (my_png.Width > LONG_MAX || my_png.Height > LONG_MAX)
335 my_png.Height >>= 32;
339 if (my_png.ColorType == PNG_COLOR_TYPE_PALETTE)
340 qpng_set_palette_to_rgb(png);
341 if (my_png.ColorType == PNG_COLOR_TYPE_GRAY || my_png.ColorType == PNG_COLOR_TYPE_GRAY_ALPHA)
343 qpng_set_gray_to_rgb(png);
344 if (my_png.BitDepth < 8)
345 qpng_set_gray_1_2_4_to_8(png);
348 if (qpng_get_valid(png, pnginfo, PNG_INFO_tRNS))
349 qpng_set_tRNS_to_alpha(png);
350 if (my_png.BitDepth == 8 && !(my_png.ColorType & PNG_COLOR_MASK_ALPHA))
351 qpng_set_filler(png, 255, 1);
352 if (( my_png.ColorType == PNG_COLOR_TYPE_GRAY) || (my_png.ColorType == PNG_COLOR_TYPE_GRAY_ALPHA ))
353 qpng_set_gray_to_rgb(png);
354 if (my_png.BitDepth < 8)
355 qpng_set_expand(png);
357 qpng_read_update_info(png, pnginfo);
359 my_png.FRowBytes = qpng_get_rowbytes(png, pnginfo);
360 my_png.BytesPerPixel = qpng_get_channels(png, pnginfo);
362 my_png.FRowPtrs = (unsigned char **)Mem_Alloc(tempmempool, my_png.Height * sizeof(*my_png.FRowPtrs));
365 imagedata = (unsigned char *)Mem_Alloc(tempmempool, my_png.Height * my_png.FRowBytes);
368 my_png.Data = imagedata;
369 for(y = 0;y < my_png.Height;y++)
370 my_png.FRowPtrs[y] = my_png.Data + y * my_png.FRowBytes;
371 qpng_read_image(png, my_png.FRowPtrs);
375 Con_Printf("PNG_LoadImage : not enough memory\n");
376 qpng_destroy_read_struct(&png, &pnginfo, 0);
377 Mem_Free(my_png.FRowPtrs);
380 Mem_Free(my_png.FRowPtrs);
381 my_png.FRowPtrs = NULL;
385 Con_Printf("PNG_LoadImage : not enough memory\n");
386 qpng_destroy_read_struct(&png, &pnginfo, 0);
390 qpng_read_end(png, pnginfo);
391 qpng_destroy_read_struct(&png, &pnginfo, 0);
393 image_width = (int)my_png.Width;
394 image_height = (int)my_png.Height;
396 if (my_png.BitDepth != 8)
398 Con_Printf ("PNG_LoadImage : bad color depth\n");
403 // swizzle RGBA to BGRA
404 for (y = 0;y < (unsigned int)(image_width*image_height*4);y += 4)
407 imagedata[y+0] = imagedata[y+2];
415 =================================================================
419 =================================================================
422 #define Z_BEST_SPEED 1
423 #define Z_BEST_COMPRESSION 9
424 #define PNG_INTERLACE_NONE 0
425 #define PNG_INTERLACE_ADAM7 1
426 #define PNG_FILTER_TYPE_BASE 0
427 #define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE
428 #define PNG_COMPRESSION_TYPE_BASE 0
429 #define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE
430 #define PNG_NO_FILTERS 0x00
431 #define PNG_FILTER_NONE 0x08
432 #define PNG_FILTER_SUB 0x10
433 #define PNG_FILTER_UP 0x20
434 #define PNG_FILTER_AVG 0x40
435 #define PNG_FILTER_PAETH 0x80
436 #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \
437 PNG_FILTER_AVG | PNG_FILTER_PAETH)
441 PNG_SaveImage_preflipped
443 Save a preflipped PNG image to a file
446 qboolean PNG_SaveImage_preflipped (const char *filename, int width, int height, unsigned char *data)
448 unsigned int offset, linesize;
449 qfile_t* file = NULL;
451 unsigned char ioBuffer[8192];
457 Con_Print("You need the libpng library to save PNG images\n");
461 png = (void *)qpng_create_write_struct(PNG_LIBPNG_VER_STRING, 0, PNG_error_fn, PNG_warning_fn);
464 pnginfo = (void *)qpng_create_info_struct(png);
467 qpng_destroy_write_struct(&png, NULL);
471 // this must be memset before the setjmp error handler, because it relies
472 // on the fields in this struct for cleanup
473 memset(&my_png, 0, sizeof(my_png));
475 // NOTE: this relies on jmp_buf being the first thing in the png structure
476 // created by libpng! (this is correct for libpng 1.2.x)
478 #if defined(MACOSX) || defined(WIN32)
479 if (setjmp((int *)png))
481 if (setjmp((__jmp_buf_tag *)png))
487 qpng_destroy_write_struct(&png, &pnginfo);
492 file = FS_OpenRealFile(filename, "wb", true);
495 my_png.outfile = file;
496 qpng_set_write_fn(png, ioBuffer, PNG_fWriteData, PNG_fFlushData);
498 //qpng_set_compression_level(png, Z_BEST_COMPRESSION);
499 qpng_set_compression_level(png, Z_BEST_SPEED);
500 qpng_set_IHDR(png, pnginfo, width, height, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_ADAM7, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
501 //qpng_set_IHDR(png, pnginfo, width, height, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
502 qpng_set_filter(png, 0, PNG_NO_FILTERS);
503 qpng_write_info(png, pnginfo);
504 qpng_set_packing(png);
507 passes = qpng_set_interlace_handling(png);
509 linesize = width * 3;
510 offset = linesize * (height - 1);
511 for(i = 0; i < passes; ++i)
512 for(j = 0; j < height; ++j)
513 qpng_write_row(png, &data[offset - j * linesize]);
515 qpng_write_end(png, NULL);
516 qpng_destroy_write_struct(&png, &pnginfo);