]>
Commit | Line | Data |
---|---|---|
ef416fc2 | 1 | /* |
f301802f | 2 | * "$Id: image-bmp.c 5508 2006-05-11 11:41:16Z mike $" |
ef416fc2 | 3 | * |
4 | * BMP image routines for the Common UNIX Printing System (CUPS). | |
5 | * | |
f301802f | 6 | * Copyright 1993-2006 by Easy Software Products. |
ef416fc2 | 7 | * |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Easy Software Products and are protected by Federal | |
10 | * copyright law. Distribution and use rights are outlined in the file | |
11 | * "LICENSE.txt" which should have been included with this file. If this | |
12 | * file is missing or damaged please contact Easy Software Products | |
13 | * at: | |
14 | * | |
15 | * Attn: CUPS Licensing Information | |
16 | * Easy Software Products | |
17 | * 44141 Airport View Drive, Suite 204 | |
18 | * Hollywood, Maryland 20636 USA | |
19 | * | |
20 | * Voice: (301) 373-9600 | |
21 | * EMail: cups-info@cups.org | |
22 | * WWW: http://www.cups.org | |
23 | * | |
24 | * This file is subject to the Apple OS-Developed Software exception. | |
25 | * | |
26 | * Contents: | |
27 | * | |
28 | * _cupsImageReadBMP() - Read a BMP image file. | |
29 | * read_word() - Read a 16-bit unsigned integer. | |
30 | * read_dword() - Read a 32-bit unsigned integer. | |
31 | * read_long() - Read a 32-bit signed integer. | |
32 | */ | |
33 | ||
34 | /* | |
35 | * Include necessary headers... | |
36 | */ | |
37 | ||
38 | #include "image-private.h" | |
39 | ||
40 | ||
41 | /* | |
42 | * Constants for the bitmap compression... | |
43 | */ | |
44 | ||
45 | # define BI_RGB 0 /* No compression - straight BGR data */ | |
46 | # define BI_RLE8 1 /* 8-bit run-length compression */ | |
47 | # define BI_RLE4 2 /* 4-bit run-length compression */ | |
48 | # define BI_BITFIELDS 3 /* RGB bitmap with RGB masks */ | |
49 | ||
50 | ||
51 | /* | |
52 | * Local functions... | |
53 | */ | |
54 | ||
55 | static unsigned short read_word(FILE *fp); | |
56 | static unsigned int read_dword(FILE *fp); | |
57 | static int read_long(FILE *fp); | |
58 | ||
59 | ||
60 | /* | |
61 | * '_cupsImageReadBMP()' - Read a BMP image file. | |
62 | */ | |
63 | ||
64 | int /* O - Read status */ | |
65 | _cupsImageReadBMP( | |
66 | cups_image_t *img, /* IO - cupsImage */ | |
67 | FILE *fp, /* I - cupsImage file */ | |
68 | cups_icspace_t primary, /* I - Primary choice for colorspace */ | |
69 | cups_icspace_t secondary, /* I - Secondary choice for colorspace */ | |
70 | int saturation, /* I - Color saturation (%) */ | |
71 | int hue, /* I - Color hue (degrees) */ | |
72 | const cups_ib_t *lut) /* I - Lookup table for gamma/brightness */ | |
73 | { | |
74 | int offset, /* Offset to bitmap data */ | |
75 | info_size, /* Size of info header */ | |
76 | planes, /* Number of planes (always 1) */ | |
77 | depth, /* Depth of image (bits) */ | |
78 | compression, /* Type of compression */ | |
79 | image_size, /* Size of image in bytes */ | |
80 | colors_used, /* Number of colors used */ | |
81 | colors_important, /* Number of important colors */ | |
82 | bpp, /* Bytes per pixel */ | |
83 | x, y, /* Looping vars */ | |
84 | color, /* Color of RLE pixel */ | |
85 | count, /* Number of times to repeat */ | |
86 | temp, /* Temporary color */ | |
87 | align; /* Alignment bytes */ | |
88 | cups_ib_t bit, /* Bit in image */ | |
89 | byte; /* Byte in image */ | |
90 | cups_ib_t *in, /* Input pixels */ | |
91 | *out, /* Output pixels */ | |
92 | *ptr; /* Pointer into pixels */ | |
93 | cups_ib_t colormap[256][4]; /* Colormap */ | |
94 | ||
95 | ||
96 | (void)secondary; | |
97 | ||
98 | /* | |
99 | * Get the header... | |
100 | */ | |
101 | ||
102 | getc(fp); /* Skip "BM" sync chars */ | |
103 | getc(fp); | |
104 | read_dword(fp); /* Skip size */ | |
105 | read_word(fp); /* Skip reserved stuff */ | |
106 | read_word(fp); | |
107 | offset = read_dword(fp); | |
108 | ||
109 | fprintf(stderr, "DEBUG: offset = %d\n", offset); | |
110 | ||
111 | if (offset < 0) | |
112 | { | |
113 | fprintf(stderr, "ERROR: Bad BMP offset %d\n", offset); | |
114 | fclose(fp); | |
115 | return (1); | |
116 | } | |
117 | ||
118 | /* | |
119 | * Then the bitmap information... | |
120 | */ | |
121 | ||
122 | info_size = read_dword(fp); | |
123 | img->xsize = read_long(fp); | |
124 | img->ysize = read_long(fp); | |
125 | planes = read_word(fp); | |
126 | depth = read_word(fp); | |
127 | compression = read_dword(fp); | |
128 | image_size = read_dword(fp); | |
129 | img->xppi = read_long(fp) * 0.0254 + 0.5; | |
130 | img->yppi = read_long(fp) * 0.0254 + 0.5; | |
131 | colors_used = read_dword(fp); | |
132 | colors_important = read_dword(fp); | |
133 | ||
134 | if (img->xsize == 0 || img->xsize > CUPS_IMAGE_MAX_WIDTH || | |
135 | img->ysize == 0 || img->ysize > CUPS_IMAGE_MAX_HEIGHT || | |
136 | (depth != 1 && depth != 4 && depth != 8 && depth != 24)) | |
137 | { | |
138 | fprintf(stderr, "ERROR: Bad BMP dimensions %ux%ux%d\n", | |
139 | img->xsize, img->ysize, depth); | |
140 | fclose(fp); | |
141 | return (1); | |
142 | } | |
143 | ||
144 | if (colors_used < 0 || colors_used > 256) | |
145 | { | |
146 | fprintf(stderr, "ERROR: Bad BMP colormap size %d\n", colors_used); | |
147 | fclose(fp); | |
148 | return (1); | |
149 | } | |
150 | ||
151 | if (img->xppi == 0 || img->yppi == 0) | |
152 | { | |
153 | fprintf(stderr, "ERROR: Bad BMP resolution %dx%d PPI.\n", | |
154 | img->xppi, img->yppi); | |
155 | img->xppi = img->yppi = 128; | |
156 | } | |
157 | ||
158 | /* | |
159 | * Make sure the resolution info is valid... | |
160 | */ | |
161 | ||
162 | fprintf(stderr, "info_size = %d, xsize = %d, ysize = %d, planes = %d, depth = %d\n", | |
163 | info_size, img->xsize, img->ysize, planes, depth); | |
164 | fprintf(stderr, "compression = %d, image_size = %d, xppi = %d, yppi = %d\n", | |
165 | compression, image_size, img->xppi, img->yppi); | |
166 | fprintf(stderr, "colors_used = %d, colors_important = %d\n", colors_used, | |
167 | colors_important); | |
168 | ||
169 | if (info_size > 40) | |
170 | for (info_size -= 40; info_size > 0; info_size --) | |
171 | getc(fp); | |
172 | ||
173 | /* | |
174 | * Get colormap... | |
175 | */ | |
176 | ||
177 | if (colors_used == 0 && depth <= 8) | |
178 | colors_used = 1 << depth; | |
179 | ||
180 | if (colors_used > 0) | |
181 | fread(colormap, colors_used, 4, fp); | |
182 | ||
183 | /* | |
184 | * Setup image and buffers... | |
185 | */ | |
186 | ||
187 | img->colorspace = (primary == CUPS_IMAGE_RGB_CMYK) ? CUPS_IMAGE_RGB : primary; | |
188 | ||
189 | cupsImageSetMaxTiles(img, 0); | |
190 | ||
191 | in = malloc(img->xsize * 3); | |
192 | bpp = cupsImageGetDepth(img); | |
193 | out = malloc(img->xsize * bpp); | |
194 | ||
195 | /* | |
196 | * Read the image data... | |
197 | */ | |
198 | ||
199 | color = 0; | |
200 | count = 0; | |
201 | align = 0; | |
202 | ||
203 | for (y = img->ysize - 1; y >= 0; y --) | |
204 | { | |
f301802f | 205 | ptr = in; |
ef416fc2 | 206 | |
207 | switch (depth) | |
208 | { | |
209 | case 1 : /* Bitmap */ | |
210 | for (x = img->xsize, bit = 128, byte = 0; x > 0; x --) | |
211 | { | |
212 | if (bit == 128) | |
213 | byte = getc(fp); | |
214 | ||
215 | if (byte & bit) | |
216 | { | |
217 | *ptr++ = colormap[1][2]; | |
218 | *ptr++ = colormap[1][1]; | |
219 | *ptr++ = colormap[1][0]; | |
220 | } | |
221 | else | |
222 | { | |
223 | *ptr++ = colormap[0][2]; | |
224 | *ptr++ = colormap[0][1]; | |
225 | *ptr++ = colormap[0][0]; | |
226 | } | |
227 | ||
228 | if (bit > 1) | |
229 | bit >>= 1; | |
230 | else | |
231 | bit = 128; | |
232 | } | |
233 | ||
234 | /* | |
235 | * Read remaining bytes to align to 32 bits... | |
236 | */ | |
237 | ||
238 | for (temp = (img->xsize + 7) / 8; temp & 3; temp ++) | |
239 | getc(fp); | |
240 | break; | |
241 | ||
242 | case 4 : /* 16-color */ | |
243 | for (x = img->xsize, bit = 0xf0, temp = 0; x > 0; x --) | |
244 | { | |
245 | /* | |
246 | * Get a new count as needed... | |
247 | */ | |
248 | ||
249 | if (compression != BI_RLE4 && count == 0) | |
250 | { | |
251 | count = 2; | |
252 | color = -1; | |
253 | } | |
254 | ||
255 | if (count == 0) | |
256 | { | |
257 | while (align > 0) | |
258 | { | |
259 | align --; | |
260 | getc(fp); | |
261 | } | |
262 | ||
263 | if ((count = getc(fp)) == 0) | |
264 | { | |
265 | if ((count = getc(fp)) == 0) | |
266 | { | |
267 | /* | |
268 | * End of line... | |
269 | */ | |
270 | ||
271 | x ++; | |
272 | continue; | |
273 | } | |
274 | else if (count == 1) | |
275 | { | |
276 | /* | |
277 | * End of image... | |
278 | */ | |
279 | ||
280 | break; | |
281 | } | |
282 | else if (count == 2) | |
283 | { | |
284 | /* | |
285 | * Delta... | |
286 | */ | |
287 | ||
288 | count = getc(fp) * getc(fp) * img->xsize; | |
289 | color = 0; | |
290 | } | |
291 | else | |
292 | { | |
293 | /* | |
294 | * Absolute... | |
295 | */ | |
296 | ||
297 | color = -1; | |
298 | align = ((4 - (count & 3)) / 2) & 1; | |
299 | } | |
300 | } | |
301 | else | |
302 | color = getc(fp); | |
303 | } | |
304 | ||
305 | /* | |
306 | * Get a new color as needed... | |
307 | */ | |
308 | ||
309 | count --; | |
310 | ||
311 | if (bit == 0xf0) | |
312 | { | |
313 | if (color < 0) | |
314 | temp = getc(fp); | |
315 | else | |
316 | temp = color; | |
317 | ||
318 | /* | |
319 | * Copy the color value... | |
320 | */ | |
321 | ||
322 | *ptr++ = colormap[temp >> 4][2]; | |
323 | *ptr++ = colormap[temp >> 4][1]; | |
324 | *ptr++ = colormap[temp >> 4][0]; | |
325 | bit = 0x0f; | |
326 | } | |
327 | else | |
328 | { | |
329 | /* | |
330 | * Copy the color value... | |
331 | */ | |
332 | ||
333 | *ptr++ = colormap[temp & 15][2]; | |
334 | *ptr++ = colormap[temp & 15][1]; | |
335 | *ptr++ = colormap[temp & 15][0]; | |
336 | bit = 0xf0; | |
337 | } | |
338 | } | |
339 | break; | |
340 | ||
341 | case 8 : /* 256-color */ | |
342 | for (x = img->xsize; x > 0; x --) | |
343 | { | |
344 | /* | |
345 | * Get a new count as needed... | |
346 | */ | |
347 | ||
348 | if (compression != BI_RLE8) | |
349 | { | |
350 | count = 1; | |
351 | color = -1; | |
352 | } | |
353 | ||
354 | if (count == 0) | |
355 | { | |
356 | while (align > 0) | |
357 | { | |
358 | align --; | |
359 | getc(fp); | |
360 | } | |
361 | ||
362 | if ((count = getc(fp)) == 0) | |
363 | { | |
364 | if ((count = getc(fp)) == 0) | |
365 | { | |
366 | /* | |
367 | * End of line... | |
368 | */ | |
369 | ||
370 | x ++; | |
371 | continue; | |
372 | } | |
373 | else if (count == 1) | |
374 | { | |
375 | /* | |
376 | * End of image... | |
377 | */ | |
378 | ||
379 | break; | |
380 | } | |
381 | else if (count == 2) | |
382 | { | |
383 | /* | |
384 | * Delta... | |
385 | */ | |
386 | ||
387 | count = getc(fp) * getc(fp) * img->xsize; | |
388 | color = 0; | |
389 | } | |
390 | else | |
391 | { | |
392 | /* | |
393 | * Absolute... | |
394 | */ | |
395 | ||
396 | color = -1; | |
397 | align = (2 - (count & 1)) & 1; | |
398 | } | |
399 | } | |
400 | else | |
401 | color = getc(fp); | |
402 | } | |
403 | ||
404 | /* | |
405 | * Get a new color as needed... | |
406 | */ | |
407 | ||
408 | if (color < 0) | |
409 | temp = getc(fp); | |
410 | else | |
411 | temp = color; | |
412 | ||
413 | count --; | |
414 | ||
415 | /* | |
416 | * Copy the color value... | |
417 | */ | |
418 | ||
419 | *ptr++ = colormap[temp][2]; | |
420 | *ptr++ = colormap[temp][1]; | |
421 | *ptr++ = colormap[temp][0]; | |
422 | } | |
423 | break; | |
424 | ||
425 | case 24 : /* 24-bit RGB */ | |
426 | for (x = img->xsize; x > 0; x --, ptr += 3) | |
427 | { | |
428 | ptr[2] = getc(fp); | |
429 | ptr[1] = getc(fp); | |
430 | ptr[0] = getc(fp); | |
431 | } | |
432 | ||
433 | /* | |
434 | * Read remaining bytes to align to 32 bits... | |
435 | */ | |
436 | ||
437 | for (temp = img->xsize * 3; temp & 3; temp ++) | |
438 | getc(fp); | |
439 | break; | |
440 | } | |
441 | ||
f301802f | 442 | if (saturation != 100 || hue != 0) |
443 | cupsImageRGBAdjust(in, img->xsize, saturation, hue); | |
444 | ||
445 | switch (img->colorspace) | |
ef416fc2 | 446 | { |
f301802f | 447 | default : |
448 | break; | |
449 | ||
450 | case CUPS_IMAGE_WHITE : | |
451 | cupsImageRGBToWhite(in, out, img->xsize); | |
452 | break; | |
453 | ||
454 | case CUPS_IMAGE_RGB : | |
455 | cupsImageRGBToRGB(in, out, img->xsize); | |
456 | break; | |
457 | ||
458 | case CUPS_IMAGE_BLACK : | |
459 | cupsImageRGBToBlack(in, out, img->xsize); | |
460 | break; | |
461 | ||
462 | case CUPS_IMAGE_CMY : | |
463 | cupsImageRGBToCMY(in, out, img->xsize); | |
464 | break; | |
465 | ||
466 | case CUPS_IMAGE_CMYK : | |
467 | cupsImageRGBToCMYK(in, out, img->xsize); | |
468 | break; | |
ef416fc2 | 469 | } |
470 | ||
471 | if (lut) | |
472 | cupsImageLut(out, img->xsize * bpp, lut); | |
473 | ||
474 | _cupsImagePutRow(img, 0, y, img->xsize, out); | |
475 | } | |
476 | ||
477 | fclose(fp); | |
478 | free(in); | |
479 | free(out); | |
480 | ||
481 | return (0); | |
482 | } | |
483 | ||
484 | ||
485 | /* | |
486 | * 'read_word()' - Read a 16-bit unsigned integer. | |
487 | */ | |
488 | ||
489 | static unsigned short /* O - 16-bit unsigned integer */ | |
490 | read_word(FILE *fp) /* I - File to read from */ | |
491 | { | |
492 | unsigned char b0, b1; /* Bytes from file */ | |
493 | ||
494 | b0 = getc(fp); | |
495 | b1 = getc(fp); | |
496 | ||
497 | return ((b1 << 8) | b0); | |
498 | } | |
499 | ||
500 | ||
501 | /* | |
502 | * 'read_dword()' - Read a 32-bit unsigned integer. | |
503 | */ | |
504 | ||
505 | static unsigned int /* O - 32-bit unsigned integer */ | |
506 | read_dword(FILE *fp) /* I - File to read from */ | |
507 | { | |
508 | unsigned char b0, b1, b2, b3; /* Bytes from file */ | |
509 | ||
510 | b0 = getc(fp); | |
511 | b1 = getc(fp); | |
512 | b2 = getc(fp); | |
513 | b3 = getc(fp); | |
514 | ||
515 | return ((((((b3 << 8) | b2) << 8) | b1) << 8) | b0); | |
516 | } | |
517 | ||
518 | ||
519 | /* | |
520 | * 'read_long()' - Read a 32-bit signed integer. | |
521 | */ | |
522 | ||
523 | static int /* O - 32-bit signed integer */ | |
524 | read_long(FILE *fp) /* I - File to read from */ | |
525 | { | |
526 | unsigned char b0, b1, b2, b3; /* Bytes from file */ | |
527 | ||
528 | b0 = getc(fp); | |
529 | b1 = getc(fp); | |
530 | b2 = getc(fp); | |
531 | b3 = getc(fp); | |
532 | ||
533 | return ((int)(((((b3 << 8) | b2) << 8) | b1) << 8) | b0); | |
534 | } | |
535 | ||
536 | ||
537 | /* | |
f301802f | 538 | * End of "$Id: image-bmp.c 5508 2006-05-11 11:41:16Z mike $". |
ef416fc2 | 539 | */ |