98e75f2d |
1 | /* |
2 | * Texture Filtering |
3 | * Version: 1.0 |
4 | * |
5 | * Copyright (C) 2007 Hiroshi Morii All Rights Reserved. |
6 | * Email koolsmoky(at)users.sourceforge.net |
7 | * Web http://www.3dfxzone.it/koolsmoky |
8 | * |
9 | * this is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 2, or (at your option) |
12 | * any later version. |
13 | * |
14 | * this is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | * GNU General Public License for more details. |
18 | * |
19 | * You should have received a copy of the GNU General Public License |
20 | * along with GNU Make; see the file COPYING. If not, write to |
21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
22 | */ |
23 | |
24 | /* use power of 2 texture size |
25 | * (0:disable, 1:enable, 2:3dfx) */ |
26 | #define POW2_TEXTURES 0 |
27 | |
28 | /* check 8 bytes. use a larger value if needed. */ |
29 | #define PNG_CHK_BYTES 8 |
30 | |
31 | #include "TxImage.h" |
32 | #include "TxReSample.h" |
33 | #include "TxDbg.h" |
34 | #include <stdlib.h> |
35 | #include "../Glide64/Gfx_1.3.h" |
36 | |
37 | boolean |
38 | TxImage::getPNGInfo(FILE *fp, png_structp *png_ptr, png_infop *info_ptr) |
39 | { |
40 | unsigned char sig[PNG_CHK_BYTES]; |
41 | |
42 | /* check for valid file pointer */ |
43 | if (!fp) |
44 | return 0; |
45 | |
46 | /* check if file is PNG */ |
47 | if (fread(sig, 1, PNG_CHK_BYTES, fp) != PNG_CHK_BYTES) |
48 | return 0; |
49 | |
50 | if (png_sig_cmp(sig, 0, PNG_CHK_BYTES) != 0) |
51 | return 0; |
52 | |
53 | /* get PNG file info */ |
54 | *png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); |
55 | if (!*png_ptr) |
56 | return 0; |
57 | |
58 | *info_ptr = png_create_info_struct(*png_ptr); |
59 | if (!*info_ptr) { |
60 | png_destroy_read_struct(png_ptr, NULL, NULL); |
61 | return 0; |
62 | } |
63 | |
64 | if (setjmp(png_jmpbuf(*png_ptr))) { |
65 | DBG_INFO(80, L"error reading png!\n"); |
66 | png_destroy_read_struct(png_ptr, info_ptr, NULL); |
67 | return 0; |
68 | } |
69 | |
70 | png_init_io(*png_ptr, fp); |
71 | png_set_sig_bytes(*png_ptr, PNG_CHK_BYTES); |
72 | png_read_info(*png_ptr, *info_ptr); |
73 | |
74 | return 1; |
75 | } |
76 | |
77 | uint8* |
78 | TxImage::readPNG(FILE* fp, int* width, int* height, uint16* format) |
79 | { |
80 | /* NOTE: returned image format is GR_TEXFMT_ARGB_8888 */ |
81 | |
82 | png_structp png_ptr; |
83 | png_infop info_ptr; |
84 | uint8 *image = NULL; |
85 | int bit_depth, color_type, interlace_type, compression_type, filter_type, |
86 | row_bytes, o_width, o_height, num_pas; |
87 | |
88 | /* initialize */ |
89 | *width = 0; |
90 | *height = 0; |
91 | *format = 0; |
92 | |
93 | /* check if we have a valid png file */ |
94 | if (!fp) |
95 | return NULL; |
96 | |
97 | if (!getPNGInfo(fp, &png_ptr, &info_ptr)) { |
98 | INFO(80, L"error reading png file! png image is corrupt.\n"); |
99 | return NULL; |
100 | } |
101 | |
102 | png_get_IHDR(png_ptr, info_ptr, |
103 | (png_uint_32*)&o_width, (png_uint_32*)&o_height, &bit_depth, &color_type, |
104 | &interlace_type, &compression_type, &filter_type); |
105 | |
106 | DBG_INFO(80, L"png format %d x %d bitdepth:%d color:%x interlace:%x compression:%x filter:%x\n", |
107 | o_width, o_height, bit_depth, color_type, |
108 | interlace_type, compression_type, filter_type); |
109 | |
110 | /* transformations */ |
111 | |
112 | /* Rice hi-res textures |
113 | * _all.png |
114 | * _rgb.png, _a.png |
115 | * _ciByRGBA.png |
116 | * _allciByRGBA.png |
117 | */ |
118 | |
119 | /* strip if color channel is larger than 8 bits */ |
120 | if (bit_depth > 8) { |
121 | png_set_strip_16(png_ptr); |
122 | bit_depth = 8; |
123 | } |
124 | |
125 | #if 1 |
126 | /* These are not really required per Rice format spec, |
127 | * but is done just in case someone uses them. |
128 | */ |
129 | /* convert palette color to rgb color */ |
130 | if (color_type == PNG_COLOR_TYPE_PALETTE) { |
131 | png_set_palette_to_rgb(png_ptr); |
132 | color_type = PNG_COLOR_TYPE_RGB; |
133 | } |
134 | |
135 | /* expand 1,2,4 bit gray scale to 8 bit gray scale */ |
136 | if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) |
137 | png_set_expand_gray_1_2_4_to_8(png_ptr); |
138 | |
139 | /* convert gray scale or gray scale + alpha to rgb color */ |
140 | if (color_type == PNG_COLOR_TYPE_GRAY || |
141 | color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { |
142 | png_set_gray_to_rgb(png_ptr); |
143 | color_type = PNG_COLOR_TYPE_RGB; |
144 | } |
145 | #endif |
146 | |
147 | /* add alpha channel if any */ |
148 | if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) { |
149 | png_set_tRNS_to_alpha(png_ptr); |
150 | color_type = PNG_COLOR_TYPE_RGB_ALPHA; |
151 | } |
152 | |
153 | /* convert rgb to rgba */ |
154 | if (color_type == PNG_COLOR_TYPE_RGB) { |
155 | png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER); |
156 | color_type = PNG_COLOR_TYPE_RGB_ALPHA; |
157 | } |
158 | |
159 | /* punt invalid formats */ |
160 | if (color_type != PNG_COLOR_TYPE_RGB_ALPHA) { |
161 | png_destroy_read_struct(&png_ptr, &info_ptr, NULL); |
162 | DBG_INFO(80, L"Error: not PNG_COLOR_TYPE_RGB_ALPHA format!\n"); |
163 | return NULL; |
164 | } |
165 | |
166 | /*png_color_8p sig_bit; |
167 | if (png_get_sBIT(png_ptr, info_ptr, &sig_bit)) |
168 | png_set_shift(png_ptr, sig_bit);*/ |
169 | |
170 | /* convert rgba to bgra */ |
171 | png_set_bgr(png_ptr); |
172 | |
173 | /* turn on interlace handling to cope with the weirdness |
174 | * of texture authors using interlaced format */ |
175 | num_pas = png_set_interlace_handling(png_ptr); |
176 | |
177 | /* update info structure */ |
178 | png_read_update_info(png_ptr, info_ptr); |
179 | |
180 | /* we only get here if ARGB8888 */ |
181 | row_bytes = png_get_rowbytes(png_ptr, info_ptr); |
182 | |
183 | /* allocate memory to read in image */ |
184 | image = (uint8*)malloc(row_bytes * o_height); |
185 | |
186 | /* read in image */ |
187 | if (image) { |
188 | int pas, i; |
189 | uint8* tmpimage; |
190 | |
191 | for (pas = 0; pas < num_pas; pas++) { /* deal with interlacing */ |
192 | tmpimage = image; |
193 | |
194 | for (i = 0; i < o_height; i++) { |
195 | /* copy row */ |
196 | png_read_rows(png_ptr, &tmpimage, NULL, 1); |
197 | tmpimage += row_bytes; |
198 | } |
199 | } |
200 | |
201 | /* read rest of the info structure */ |
202 | png_read_end(png_ptr, info_ptr); |
203 | |
204 | *width = (row_bytes >> 2); |
205 | *height = o_height; |
206 | *format = GR_TEXFMT_ARGB_8888; |
207 | |
208 | #if POW2_TEXTURES |
209 | /* next power of 2 size conversions */ |
210 | /* NOTE: I can do this in the above loop for faster operations, but some |
211 | * texture packs require a workaround. see HACKALERT in nextPow2(). |
212 | */ |
213 | |
214 | TxReSample txReSample = new TxReSample; // XXX: temporary. move to a better place. |
215 | |
216 | #if (POW2_TEXTURES == 2) |
217 | if (!txReSample->nextPow2(&image, width, height, 32, 1)) { |
218 | #else |
219 | if (!txReSample->nextPow2(&image, width, height, 32, 0)) { |
220 | #endif |
221 | if (image) { |
222 | free(image); |
223 | image = NULL; |
224 | } |
225 | *width = 0; |
226 | *height = 0; |
227 | *format = 0; |
228 | } |
229 | |
230 | delete txReSample; |
231 | |
232 | #endif /* POW2_TEXTURES */ |
233 | } |
234 | |
235 | /* clean up */ |
236 | png_destroy_read_struct(&png_ptr, &info_ptr, NULL); |
237 | |
238 | #ifdef DEBUG |
239 | if (!image) { |
240 | DBG_INFO(80, L"Error: failed to load png image!\n"); |
241 | } |
242 | #endif |
243 | |
244 | return image; |
245 | } |
246 | |
247 | boolean |
248 | TxImage::writePNG(uint8* src, FILE* fp, int width, int height, int rowStride, uint16 format, uint8 *palette) |
249 | { |
250 | png_structp png_ptr; |
251 | png_infop info_ptr; |
252 | png_color_8 sig_bit; |
253 | png_colorp palette_ptr = NULL; |
254 | png_bytep trans_ptr = NULL; |
255 | int bit_depth, color_type, row_bytes, num_palette; |
256 | int i; |
257 | //uint16 srcfmt, destfmt; |
258 | |
259 | if (!src || !fp) |
260 | return 0; |
261 | |
262 | png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); |
263 | if (png_ptr == NULL) |
264 | return 0; |
265 | |
266 | info_ptr = png_create_info_struct(png_ptr); |
267 | if (info_ptr == NULL) { |
268 | png_destroy_write_struct(&png_ptr, NULL); |
269 | return 0; |
270 | } |
271 | |
272 | if (png_jmpbuf(png_ptr)) { |
273 | png_destroy_write_struct(&png_ptr, &info_ptr); |
274 | return 0; |
275 | } |
276 | |
277 | png_init_io(png_ptr, fp); |
278 | |
279 | /* TODO: images must be converted to RGBA8888 or CI8, |
280 | * palettes need to be separated to A and RGB. */ |
281 | |
282 | /* N64 formats |
283 | * Format: 0 - RGBA, 1 - YUV, 2 - CI, 3 - IA, 4 - I |
284 | * Size: 0 - 4bit, 1 - 8bit, 2 - 16bit, 3 - 32 bit |
285 | * format = (Format << 8 | Size); |
286 | */ |
287 | |
288 | /* each channel is saved in 8bits for consistency */ |
289 | switch (format) { |
290 | case 0x0002:/* RGBA5551 */ |
291 | bit_depth = 8; |
292 | sig_bit.red = 5; |
293 | sig_bit.green = 5; |
294 | sig_bit.blue = 5; |
295 | sig_bit.alpha = 1; |
296 | color_type = PNG_COLOR_TYPE_RGB_ALPHA; |
297 | break; |
298 | case 0x0003:/* RGBA8888 */ |
299 | case 0x0302:/* IA88 */ |
300 | bit_depth = 8; |
301 | sig_bit.red = 8; |
302 | sig_bit.green = 8; |
303 | sig_bit.blue = 8; |
304 | sig_bit.alpha = 8; |
305 | color_type = PNG_COLOR_TYPE_RGB_ALPHA; |
306 | break; |
307 | case 0x0300:/* IA31 */ |
308 | bit_depth = 8; |
309 | sig_bit.red = 3; |
310 | sig_bit.green = 3; |
311 | sig_bit.blue = 3; |
312 | sig_bit.alpha = 1; |
313 | color_type = PNG_COLOR_TYPE_RGB_ALPHA; |
314 | break; |
315 | case 0x0301:/* IA44 */ |
316 | bit_depth = 8; |
317 | sig_bit.red = 4; |
318 | sig_bit.green = 4; |
319 | sig_bit.blue = 4; |
320 | sig_bit.alpha = 4; |
321 | color_type = PNG_COLOR_TYPE_RGB_ALPHA; |
322 | break; |
323 | case 0x0400:/* I4 */ |
324 | bit_depth = 8; |
325 | sig_bit.red = 4; |
326 | sig_bit.green = 4; |
327 | sig_bit.blue = 4; |
328 | color_type = PNG_COLOR_TYPE_RGB; |
329 | break; |
330 | case 0x0401:/* I8 */ |
331 | case 0x0402:/* I16 */ |
332 | bit_depth = 8; |
333 | sig_bit.red = 8; |
334 | sig_bit.green = 8; |
335 | sig_bit.blue = 8; |
336 | color_type = PNG_COLOR_TYPE_RGB; |
337 | break; |
338 | case 0x0200:/* CI4 */ |
339 | bit_depth = 8; |
340 | num_palette = 16; |
341 | color_type = PNG_COLOR_TYPE_PALETTE; |
342 | break; |
343 | case 0x0201:/* CI8 */ |
344 | bit_depth = 8; |
345 | num_palette = 256; |
346 | color_type = PNG_COLOR_TYPE_PALETTE; |
347 | break; |
348 | case 0x0102:/* YUV ? */ |
349 | case 0x0103: |
350 | default: |
351 | /* unsupported format */ |
352 | png_destroy_write_struct(&png_ptr, &info_ptr); |
353 | return 0; |
354 | } |
355 | |
356 | switch (color_type) { |
357 | case PNG_COLOR_TYPE_RGB_ALPHA: |
358 | case PNG_COLOR_TYPE_RGB: |
359 | //row_bytes = (bit_depth * width) >> 1; |
360 | row_bytes = rowStride; |
361 | png_set_bgr(png_ptr); |
362 | png_set_sBIT(png_ptr, info_ptr, &sig_bit); |
363 | break; |
364 | case PNG_COLOR_TYPE_PALETTE: |
365 | //row_bytes = (bit_depth * width) >> 3; |
366 | row_bytes = rowStride; |
367 | png_set_PLTE(png_ptr, info_ptr, palette_ptr, num_palette); |
368 | png_set_tRNS(png_ptr, info_ptr, trans_ptr, num_palette, 0); |
369 | } |
370 | |
371 | //png_set_filter(png_ptr, 0, PNG_ALL_FILTERS); |
372 | |
373 | //if (bit_depth == 16) |
374 | // png_set_swap(png_ptr); |
375 | |
376 | //if (bit_depth < 8) |
377 | // png_set_packswap(png_ptr); |
378 | |
379 | png_set_IHDR(png_ptr, info_ptr, width, height, |
380 | bit_depth, color_type, PNG_INTERLACE_NONE, |
381 | PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); |
382 | |
383 | //png_set_gAMA(png_ptr, info_ptr, 1.0); |
384 | |
385 | png_write_info(png_ptr, info_ptr); |
386 | for (i = 0; i < height; i++) { |
387 | png_write_row(png_ptr, (png_bytep)src); |
388 | src += row_bytes; |
389 | } |
390 | png_write_end(png_ptr, info_ptr); |
391 | |
392 | png_destroy_write_struct(&png_ptr, &info_ptr); |
393 | |
394 | //if (tex_ptr) delete [] tex_ptr; |
395 | |
396 | return 1; |
397 | } |
398 | |
399 | boolean |
400 | TxImage::getBMPInfo(FILE* fp, BITMAPFILEHEADER* bmp_fhdr, BITMAPINFOHEADER* bmp_ihdr) |
401 | { |
402 | /* |
403 | * read in BITMAPFILEHEADER |
404 | */ |
405 | |
406 | /* is this a BMP file? */ |
407 | if (fread(&bmp_fhdr->bfType, 2, 1, fp) != 1) |
408 | return 0; |
409 | |
410 | if (memcmp(&bmp_fhdr->bfType, "BM", 2) != 0) |
411 | return 0; |
412 | |
413 | /* get file size */ |
414 | if (fread(&bmp_fhdr->bfSize, 4, 1, fp) != 1) |
415 | return 0; |
416 | |
417 | /* reserved 1 */ |
418 | if (fread(&bmp_fhdr->bfReserved1, 2, 1, fp) != 1) |
419 | return 0; |
420 | |
421 | /* reserved 2 */ |
422 | if (fread(&bmp_fhdr->bfReserved2, 2, 1, fp) != 1) |
423 | return 0; |
424 | |
425 | /* offset to the image data */ |
426 | if (fread(&bmp_fhdr->bfOffBits, 4, 1, fp) != 1) |
427 | return 0; |
428 | |
429 | /* |
430 | * read in BITMAPINFOHEADER |
431 | */ |
432 | |
433 | /* size of BITMAPINFOHEADER */ |
434 | if (fread(&bmp_ihdr->biSize, 4, 1, fp) != 1) |
435 | return 0; |
436 | |
437 | /* is this a Windows BMP? */ |
438 | if (bmp_ihdr->biSize != 40) |
439 | return 0; |
440 | |
441 | /* width of the bitmap in pixels */ |
442 | if (fread(&bmp_ihdr->biWidth, 4, 1, fp) != 1) |
443 | return 0; |
444 | |
445 | /* height of the bitmap in pixels */ |
446 | if (fread(&bmp_ihdr->biHeight, 4, 1, fp) != 1) |
447 | return 0; |
448 | |
449 | /* number of planes (always 1) */ |
450 | if (fread(&bmp_ihdr->biPlanes, 2, 1, fp) != 1) |
451 | return 0; |
452 | |
453 | /* number of bits-per-pixel. (1, 4, 8, 16, 24, 32) */ |
454 | if (fread(&bmp_ihdr->biBitCount, 2, 1, fp) != 1) |
455 | return 0; |
456 | |
457 | /* compression for a compressed bottom-up bitmap |
458 | * 0 : uncompressed format |
459 | * 1 : run-length encoded 4 bpp format |
460 | * 2 : run-length encoded 8 bpp format |
461 | * 3 : bitfield |
462 | */ |
463 | if (fread(&bmp_ihdr->biCompression, 4, 1, fp) != 1) |
464 | return 0; |
465 | |
466 | /* size of the image in bytes */ |
467 | if (fread(&bmp_ihdr->biSizeImage, 4, 1, fp) != 1) |
468 | return 0; |
469 | |
470 | /* horizontal resolution in pixels-per-meter */ |
471 | if (fread(&bmp_ihdr->biXPelsPerMeter, 4, 1, fp) != 1) |
472 | return 0; |
473 | |
474 | /* vertical resolution in pixels-per-meter */ |
475 | if (fread(&bmp_ihdr->biYPelsPerMeter, 4, 1, fp) != 1) |
476 | return 0; |
477 | |
478 | /* number of color indexes in the color table that are actually used */ |
479 | if (fread(&bmp_ihdr->biClrUsed, 4, 1, fp) != 1) |
480 | return 0; |
481 | |
482 | /* the number of color indexes that are required for displaying */ |
483 | if (fread(&bmp_ihdr->biClrImportant, 4, 1, fp) != 1) |
484 | return 0; |
485 | |
486 | return 1; |
487 | } |
488 | |
489 | uint8* |
490 | TxImage::readBMP(FILE* fp, int* width, int* height, uint16* format) |
491 | { |
492 | /* NOTE: returned image format; |
493 | * 4, 8bit palette bmp -> GR_TEXFMT_P_8 |
494 | * 24, 32bit bmp -> GR_TEXFMT_ARGB_8888 |
495 | */ |
496 | |
497 | uint8 *image = NULL; |
498 | uint8 *image_row = NULL; |
499 | uint8 *tmpimage = NULL; |
500 | unsigned int row_bytes, pos; |
501 | int i, j; |
502 | /* Windows Bitmap */ |
503 | BITMAPFILEHEADER bmp_fhdr; |
504 | BITMAPINFOHEADER bmp_ihdr; |
505 | |
506 | /* initialize */ |
507 | *width = 0; |
508 | *height = 0; |
509 | *format = 0; |
510 | |
511 | /* check if we have a valid bmp file */ |
512 | if (!fp) |
513 | return NULL; |
514 | |
515 | if (!getBMPInfo(fp, &bmp_fhdr, &bmp_ihdr)) { |
516 | INFO(80, L"error reading bitmap file! bitmap image is corrupt.\n"); |
517 | return NULL; |
518 | } |
519 | |
520 | DBG_INFO(80, L"bmp format %d x %d bitdepth:%d compression:%x offset:%d\n", |
521 | bmp_ihdr.biWidth, bmp_ihdr.biHeight, bmp_ihdr.biBitCount, |
522 | bmp_ihdr.biCompression, bmp_fhdr.bfOffBits); |
523 | |
524 | /* rowStride in bytes */ |
525 | row_bytes = (bmp_ihdr.biWidth * bmp_ihdr.biBitCount) >> 3; |
526 | /* align to 4bytes boundary */ |
527 | row_bytes = (row_bytes + 3) & ~3; |
528 | |
529 | /* Rice hi-res textures */ |
530 | if (!(bmp_ihdr.biBitCount == 8 || bmp_ihdr.biBitCount == 4 || bmp_ihdr.biBitCount == 32 || bmp_ihdr.biBitCount == 24) || |
531 | bmp_ihdr.biCompression != 0) { |
532 | DBG_INFO(80, L"Error: incompatible bitmap format!\n"); |
533 | return NULL; |
534 | } |
535 | |
536 | switch (bmp_ihdr.biBitCount) { |
537 | case 8: |
538 | case 32: |
539 | /* 8 bit, 32 bit bitmap */ |
540 | image = (uint8*)malloc(row_bytes * bmp_ihdr.biHeight); |
541 | if (image) { |
542 | tmpimage = image; |
543 | pos = bmp_fhdr.bfOffBits + row_bytes * (bmp_ihdr.biHeight - 1); |
544 | for (i = 0; i < bmp_ihdr.biHeight; i++) { |
545 | /* read in image */ |
546 | fseek(fp, pos, SEEK_SET); |
547 | if (fread(tmpimage, 1, row_bytes, fp) != row_bytes) |
548 | ERRLOG("fread() failed for row of '%i' bytes in 8/32-bit BMP image", row_bytes); |
549 | tmpimage += row_bytes; |
550 | pos -= row_bytes; |
551 | } |
552 | } |
553 | break; |
554 | case 4: |
555 | /* 4bit bitmap */ |
556 | image = (uint8*)malloc((row_bytes * bmp_ihdr.biHeight) << 1); |
557 | image_row = (uint8*)malloc(row_bytes); |
558 | if (image && image_row) { |
559 | tmpimage = image; |
560 | pos = bmp_fhdr.bfOffBits + row_bytes * (bmp_ihdr.biHeight - 1); |
561 | for (i = 0; i < bmp_ihdr.biHeight; i++) { |
562 | /* read in image */ |
563 | fseek(fp, pos, SEEK_SET); |
564 | if (fread(image_row, 1, row_bytes, fp) != row_bytes) |
565 | ERRLOG("fread failed for row of '%i' bytes in 4-bit BMP image", row_bytes); |
566 | /* expand 4bpp to 8bpp. stuff 4bit values into 8bit comps. */ |
567 | for (j = 0; j < (int) row_bytes; j++) { |
568 | tmpimage[j << 1] = image_row[j] & 0x0f; |
569 | tmpimage[(j << 1) + 1] = (image_row[j] & 0xf0) >> 4; |
570 | } |
571 | tmpimage += (row_bytes << 1); |
572 | pos -= row_bytes; |
573 | } |
574 | free(image_row); |
575 | } else { |
576 | if (image_row) free(image_row); |
577 | if (image) free(image); |
578 | image = NULL; |
579 | } |
580 | break; |
581 | case 24: |
582 | /* 24 bit bitmap */ |
583 | image = (uint8*)malloc((bmp_ihdr.biWidth * bmp_ihdr.biHeight) << 2); |
584 | image_row = (uint8*)malloc(row_bytes); |
585 | if (image && image_row) { |
586 | tmpimage = image; |
587 | pos = bmp_fhdr.bfOffBits + row_bytes * (bmp_ihdr.biHeight - 1); |
588 | for (i = 0; i < bmp_ihdr.biHeight; i++) { |
589 | /* read in image */ |
590 | fseek(fp, pos, SEEK_SET); |
591 | if (fread(image_row, 1, row_bytes, fp) != row_bytes) |
592 | ERRLOG("fread failed for row of '%i' bytes in 24-bit BMP image", row_bytes); |
593 | /* convert 24bpp to 32bpp. */ |
594 | for (j = 0; j < bmp_ihdr.biWidth; j++) { |
595 | tmpimage[(j << 2)] = image_row[j * 3]; |
596 | tmpimage[(j << 2) + 1] = image_row[j * 3 + 1]; |
597 | tmpimage[(j << 2) + 2] = image_row[j * 3 + 2]; |
598 | tmpimage[(j << 2) + 3] = 0xFF; |
599 | } |
600 | tmpimage += (bmp_ihdr.biWidth << 2); |
601 | pos -= row_bytes; |
602 | } |
603 | free(image_row); |
604 | } else { |
605 | if (image_row) free(image_row); |
606 | if (image) free(image); |
607 | image = NULL; |
608 | } |
609 | } |
610 | |
611 | if (image) { |
612 | *width = (row_bytes << 3) / bmp_ihdr.biBitCount; |
613 | *height = bmp_ihdr.biHeight; |
614 | |
615 | switch (bmp_ihdr.biBitCount) { |
616 | case 8: |
617 | case 4: |
618 | *format = GR_TEXFMT_P_8; |
619 | break; |
620 | case 32: |
621 | case 24: |
622 | *format = GR_TEXFMT_ARGB_8888; |
623 | } |
624 | |
625 | #if POW2_TEXTURES |
626 | /* next power of 2 size conversions */ |
627 | /* NOTE: I can do this in the above loop for faster operations, but some |
628 | * texture packs require a workaround. see HACKALERT in nextPow2(). |
629 | */ |
630 | |
631 | TxReSample txReSample = new TxReSample; // XXX: temporary. move to a better place. |
632 | |
633 | #if (POW2_TEXTURES == 2) |
634 | if (!txReSample->nextPow2(&image, width, height, 8, 1)) { |
635 | #else |
636 | if (!txReSample->nextPow2(&image, width, height, 8, 0)) { |
637 | #endif |
638 | if (image) { |
639 | free(image); |
640 | image = NULL; |
641 | } |
642 | *width = 0; |
643 | *height = 0; |
644 | *format = 0; |
645 | } |
646 | |
647 | delete txReSample; |
648 | |
649 | #endif /* POW2_TEXTURES */ |
650 | } |
651 | |
652 | #ifdef DEBUG |
653 | if (!image) { |
654 | DBG_INFO(80, L"Error: failed to load bmp image!\n"); |
655 | } |
656 | #endif |
657 | |
658 | return image; |
659 | } |
660 | |
661 | boolean |
662 | TxImage::getDDSInfo(FILE *fp, DDSFILEHEADER *dds_fhdr) |
663 | { |
664 | /* |
665 | * read in DDSFILEHEADER |
666 | */ |
667 | |
668 | /* is this a DDS file? */ |
669 | if (fread(&dds_fhdr->dwMagic, 4, 1, fp) != 1) |
670 | return 0; |
671 | |
672 | if (memcmp(&dds_fhdr->dwMagic, "DDS ", 4) != 0) |
673 | return 0; |
674 | |
675 | if (fread(&dds_fhdr->dwSize, 4, 1, fp) != 1) |
676 | return 0; |
677 | |
678 | /* get file flags */ |
679 | if (fread(&dds_fhdr->dwFlags, 4, 1, fp) != 1) |
680 | return 0; |
681 | |
682 | /* height of dds in pixels */ |
683 | if (fread(&dds_fhdr->dwHeight, 4, 1, fp) != 1) |
684 | return 0; |
685 | |
686 | /* width of dds in pixels */ |
687 | if (fread(&dds_fhdr->dwWidth, 4, 1, fp) != 1) |
688 | return 0; |
689 | |
690 | if (fread(&dds_fhdr->dwLinearSize, 4, 1, fp) != 1) |
691 | return 0; |
692 | |
693 | if (fread(&dds_fhdr->dwDepth, 4, 1, fp) != 1) |
694 | return 0; |
695 | |
696 | if (fread(&dds_fhdr->dwMipMapCount, 4, 1, fp) != 1) |
697 | return 0; |
698 | |
699 | if (fread(&dds_fhdr->dwReserved1, 4 * 11, 1, fp) != 1) |
700 | return 0; |
701 | |
702 | if (fread(&dds_fhdr->ddpf.dwSize, 4, 1, fp) != 1) |
703 | return 0; |
704 | |
705 | if (fread(&dds_fhdr->ddpf.dwFlags, 4, 1, fp) != 1) |
706 | return 0; |
707 | |
708 | if (fread(&dds_fhdr->ddpf.dwFourCC, 4, 1, fp) != 1) |
709 | return 0; |
710 | |
711 | if (fread(&dds_fhdr->ddpf.dwRGBBitCount, 4, 1, fp) != 1) |
712 | return 0; |
713 | |
714 | if (fread(&dds_fhdr->ddpf.dwRBitMask, 4, 1, fp) != 1) |
715 | return 0; |
716 | |
717 | if (fread(&dds_fhdr->ddpf.dwGBitMask, 4, 1, fp) != 1) |
718 | return 0; |
719 | |
720 | if (fread(&dds_fhdr->ddpf.dwBBitMask, 4, 1, fp) != 1) |
721 | return 0; |
722 | |
723 | if (fread(&dds_fhdr->ddpf.dwRGBAlphaBitMask, 4, 1, fp) != 1) |
724 | return 0; |
725 | |
726 | if (fread(&dds_fhdr->dwCaps1, 4, 1, fp) != 1) |
727 | return 0; |
728 | |
729 | if (fread(&dds_fhdr->dwCaps2, 4, 1, fp) != 1) |
730 | return 0; |
731 | |
732 | return 1; |
733 | } |
734 | |
735 | uint8* |
736 | TxImage::readDDS(FILE* fp, int* width, int* height, uint16* format) |
737 | { |
738 | uint8 *image = NULL; |
739 | DDSFILEHEADER dds_fhdr; |
740 | uint16 tmpformat = 0; |
741 | |
742 | /* initialize */ |
743 | *width = 0; |
744 | *height = 0; |
745 | *format = 0; |
746 | |
747 | /* check if we have a valid dds file */ |
748 | if (!fp) |
749 | return NULL; |
750 | |
751 | if (!getDDSInfo(fp, &dds_fhdr)) { |
752 | INFO(80, L"error reading dds file! dds image is corrupt.\n"); |
753 | return NULL; |
754 | } |
755 | |
756 | DBG_INFO(80, L"dds format %d x %d HeaderSize %d LinearSize %d\n", |
757 | dds_fhdr.dwWidth, dds_fhdr.dwHeight, dds_fhdr.dwSize, dds_fhdr.dwLinearSize); |
758 | |
759 | if (!(dds_fhdr.dwFlags & (DDSD_CAPS|DDSD_WIDTH|DDSD_HEIGHT|DDSD_PIXELFORMAT|DDSD_LINEARSIZE))) { |
760 | DBG_INFO(80, L"Error: incompatible dds format!\n"); |
761 | return NULL; |
762 | } |
763 | |
764 | if ((dds_fhdr.dwFlags & DDSD_MIPMAPCOUNT) && dds_fhdr.dwMipMapCount != 1) { |
765 | DBG_INFO(80, L"Error: mipmapped dds not supported!\n"); |
766 | return NULL; |
767 | } |
768 | |
769 | if (!((dds_fhdr.ddpf.dwFlags & DDPF_FOURCC) && dds_fhdr.dwCaps2 == 0)) { |
770 | DBG_INFO(80, L"Error: not fourcc standard texture!\n"); |
771 | return NULL; |
772 | } |
773 | |
774 | if (memcmp(&dds_fhdr.ddpf.dwFourCC, "DXT1", 4) == 0) { |
775 | DBG_INFO(80, L"DXT1 format\n"); |
776 | /* compensate for missing LinearSize */ |
777 | dds_fhdr.dwLinearSize = (dds_fhdr.dwWidth * dds_fhdr.dwHeight) >> 1; |
778 | tmpformat = GR_TEXFMT_ARGB_CMP_DXT1; |
779 | } else if (memcmp(&dds_fhdr.ddpf.dwFourCC, "DXT3", 4) == 0) { |
780 | DBG_INFO(80, L"DXT3 format\n"); |
781 | dds_fhdr.dwLinearSize = dds_fhdr.dwWidth * dds_fhdr.dwHeight; |
782 | tmpformat = GR_TEXFMT_ARGB_CMP_DXT3; |
783 | } else if (memcmp(&dds_fhdr.ddpf.dwFourCC, "DXT5", 4) == 0) { |
784 | DBG_INFO(80, L"DXT5 format\n"); |
785 | dds_fhdr.dwLinearSize = dds_fhdr.dwWidth * dds_fhdr.dwHeight; |
786 | tmpformat = GR_TEXFMT_ARGB_CMP_DXT5; |
787 | } else { |
788 | DBG_INFO(80, L"Error: not DXT1 or DXT3 or DXT5 format!\n"); |
789 | return NULL; |
790 | } |
791 | |
792 | /* read in image */ |
793 | image = (uint8*)malloc(dds_fhdr.dwLinearSize); |
794 | if (image) { |
795 | *width = dds_fhdr.dwWidth; |
796 | *height = dds_fhdr.dwHeight; |
797 | *format = tmpformat; |
798 | |
799 | fseek(fp, 128, SEEK_SET); /* size of header is 128 bytes */ |
800 | if (fread(image, 1, dds_fhdr.dwLinearSize, fp) != dds_fhdr.dwLinearSize) |
801 | ERRLOG("fread failed to read DDS image of '%i' bytes", dds_fhdr.dwLinearSize); |
802 | } |
803 | |
804 | return image; |
805 | } |