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1/* $Id$
2 *
3 * Project: libtiff tools
4 * Purpose: Convert Windows BMP files in TIFF.
5 * Author: Andrey Kiselev, dron@ak4719.spb.edu
6 *
7 ******************************************************************************
8 * Copyright (c) 2004, Andrey Kiselev <dron@ak4719.spb.edu>
9 *
10 * Permission to use, copy, modify, distribute, and sell this software and
11 * its documentation for any purpose is hereby granted without fee, provided
12 * that (i) the above copyright notices and this permission notice appear in
13 * all copies of the software and related documentation, and (ii) the names of
14 * Sam Leffler and Silicon Graphics may not be used in any advertising or
15 * publicity relating to the software without the specific, prior written
16 * permission of Sam Leffler and Silicon Graphics.
17 *
18 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
20 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
21 *
22 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
23 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
24 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
25 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
26 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
27 * OF THIS SOFTWARE.
28 */
29
30#include "tif_config.h"
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <ctype.h>
36#include <sys/types.h>
37#include <sys/stat.h>
38
39#ifdef HAVE_UNISTD_H
40# include <unistd.h>
41#endif
42
43#if HAVE_FCNTL_H
44# include <fcntl.h>
45#endif
46
47#if HAVE_SYS_TYPES_H
48# include <sys/types.h>
49#endif
50
51#if HAVE_IO_H
52# include <io.h>
53#endif
54
55#include "tiffio.h"
56
57#ifndef O_BINARY
58# define O_BINARY 0
59#endif
60
61enum BMPType
62{
63 BMPT_WIN4, /* BMP used in Windows 3.0/NT 3.51/95 */
64 BMPT_WIN5, /* BMP used in Windows NT 4.0/98/Me/2000/XP */
65 BMPT_OS21, /* BMP used in OS/2 PM 1.x */
66 BMPT_OS22 /* BMP used in OS/2 PM 2.x */
67};
68
69/*
70 * Bitmap file consists of a BMPFileHeader structure followed by a
71 * BMPInfoHeader structure. An array of BMPColorEntry structures (also called
72 * a colour table) follows the bitmap information header structure. The colour
73 * table is followed by a second array of indexes into the colour table (the
74 * actual bitmap data). Data may be comressed, for 4-bpp and 8-bpp used RLE
75 * compression.
76 *
77 * +---------------------+
78 * | BMPFileHeader |
79 * +---------------------+
80 * | BMPInfoHeader |
81 * +---------------------+
82 * | BMPColorEntry array |
83 * +---------------------+
84 * | Colour-index array |
85 * +---------------------+
86 *
87 * All numbers stored in Intel order with least significant byte first.
88 */
89
90enum BMPComprMethod
91{
92 BMPC_RGB = 0L, /* Uncompressed */
93 BMPC_RLE8 = 1L, /* RLE for 8 bpp images */
94 BMPC_RLE4 = 2L, /* RLE for 4 bpp images */
95 BMPC_BITFIELDS = 3L, /* Bitmap is not compressed and the colour table
96 * consists of three DWORD color masks that specify
97 * the red, green, and blue components of each
98 * pixel. This is valid when used with
99 * 16- and 32-bpp bitmaps. */
100 BMPC_JPEG = 4L, /* Indicates that the image is a JPEG image. */
101 BMPC_PNG = 5L /* Indicates that the image is a PNG image. */
102};
103
104enum BMPLCSType /* Type of logical color space. */
105{
106 BMPLT_CALIBRATED_RGB = 0, /* This value indicates that endpoints and
107 * gamma values are given in the appropriate
108 * fields. */
109 BMPLT_DEVICE_RGB = 1,
110 BMPLT_DEVICE_CMYK = 2
111};
112
113typedef struct
114{
115 int32 iCIEX;
116 int32 iCIEY;
117 int32 iCIEZ;
118} BMPCIEXYZ;
119
120typedef struct /* This structure contains the x, y, and z */
121{ /* coordinates of the three colors that */
122 /* correspond */
123 BMPCIEXYZ iCIERed; /* to the red, green, and blue endpoints for */
124 BMPCIEXYZ iCIEGreen; /* a specified logical color space. */
125 BMPCIEXYZ iCIEBlue;
126} BMPCIEXYZTriple;
127
128typedef struct
129{
130 char bType[2]; /* Signature "BM" */
131 uint32 iSize; /* Size in bytes of the bitmap file. Should
132 * always be ignored while reading because
133 * of error in Windows 3.0 SDK's description
134 * of this field */
135 uint16 iReserved1; /* Reserved, set as 0 */
136 uint16 iReserved2; /* Reserved, set as 0 */
137 uint32 iOffBits; /* Offset of the image from file start in bytes */
138} BMPFileHeader;
139
140/* File header size in bytes: */
141const int BFH_SIZE = 14;
142
143typedef struct
144{
145 uint32 iSize; /* Size of BMPInfoHeader structure in bytes.
146 * Should be used to determine start of the
147 * colour table */
148 int32 iWidth; /* Image width */
149 int32 iHeight; /* Image height. If positive, image has bottom
150 * left origin, if negative --- top left. */
151 int16 iPlanes; /* Number of image planes (must be set to 1) */
152 int16 iBitCount; /* Number of bits per pixel (1, 4, 8, 16, 24
153 * or 32). If 0 then the number of bits per
154 * pixel is specified or is implied by the
155 * JPEG or PNG format. */
156 uint32 iCompression; /* Compression method */
157 uint32 iSizeImage; /* Size of uncomressed image in bytes. May
158 * be 0 for BMPC_RGB bitmaps. If iCompression
159 * is BI_JPEG or BI_PNG, iSizeImage indicates
160 * the size of the JPEG or PNG image buffer. */
161 int32 iXPelsPerMeter; /* X resolution, pixels per meter (0 if not used) */
162 int32 iYPelsPerMeter; /* Y resolution, pixels per meter (0 if not used) */
163 uint32 iClrUsed; /* Size of colour table. If 0, iBitCount should
164 * be used to calculate this value
165 * (1<<iBitCount). This value should be
166 * unsigned for proper shifting. */
167 int32 iClrImportant; /* Number of important colours. If 0, all
168 * colours are required */
169
170 /*
171 * Fields above should be used for bitmaps, compatible with Windows NT 3.51
172 * and earlier. Windows 98/Me, Windows 2000/XP introduces additional fields:
173 */
174
175 int32 iRedMask; /* Colour mask that specifies the red component
176 * of each pixel, valid only if iCompression
177 * is set to BI_BITFIELDS. */
178 int32 iGreenMask; /* The same for green component */
179 int32 iBlueMask; /* The same for blue component */
180 int32 iAlphaMask; /* Colour mask that specifies the alpha
181 * component of each pixel. */
182 uint32 iCSType; /* Colour space of the DIB. */
183 BMPCIEXYZTriple sEndpoints; /* This member is ignored unless the iCSType
184 * member specifies BMPLT_CALIBRATED_RGB. */
185 int32 iGammaRed; /* Toned response curve for red. This member
186 * is ignored unless color values are
187 * calibrated RGB values and iCSType is set to
188 * BMPLT_CALIBRATED_RGB. Specified
189 * in 16^16 format. */
190 int32 iGammaGreen; /* Toned response curve for green. */
191 int32 iGammaBlue; /* Toned response curve for blue. */
192} BMPInfoHeader;
193
194/*
195 * Info header size in bytes:
196 */
197const unsigned int BIH_WIN4SIZE = 40; /* for BMPT_WIN4 */
198const unsigned int BIH_WIN5SIZE = 57; /* for BMPT_WIN5 */
199const unsigned int BIH_OS21SIZE = 12; /* for BMPT_OS21 */
200const unsigned int BIH_OS22SIZE = 64; /* for BMPT_OS22 */
201
202/*
203 * We will use plain byte array instead of this structure, but declaration
204 * provided for reference
205 */
206typedef struct
207{
208 char bBlue;
209 char bGreen;
210 char bRed;
211 char bReserved; /* Must be 0 */
212} BMPColorEntry;
213
214static uint16 compression = (uint16) -1;
215static int jpegcolormode = JPEGCOLORMODE_RGB;
216static int quality = 75; /* JPEG quality */
217static uint16 predictor = 0;
218
219static void usage(void);
220static int processCompressOptions(char*);
221static void rearrangePixels(char *, uint32, uint32);
222
223int
224main(int argc, char* argv[])
225{
226 uint32 width, length;
227 uint16 nbands = 1; /* number of bands in input image */
228 uint16 depth = 8; /* bits per pixel in input image */
229 uint32 rowsperstrip = (uint32) -1;
230 uint16 photometric = PHOTOMETRIC_MINISBLACK;
231 int fd = 0;
232 struct stat instat;
233 char *outfilename = NULL, *infilename = NULL;
234 TIFF *out = NULL;
235
236 BMPFileHeader file_hdr;
237 BMPInfoHeader info_hdr;
238 int bmp_type;
239 uint32 clr_tbl_size, n_clr_elems = 3;
240 unsigned char *clr_tbl;
241 unsigned short *red_tbl = NULL, *green_tbl = NULL, *blue_tbl = NULL;
242 uint32 row, clr;
243
244 int c;
245 extern int optind;
246 extern char* optarg;
247
248 while ((c = getopt(argc, argv, "c:r:o:h")) != -1) {
249 switch (c) {
250 case 'c': /* compression scheme */
251 if (!processCompressOptions(optarg))
252 usage();
253 break;
254 case 'r': /* rows/strip */
255 rowsperstrip = atoi(optarg);
256 break;
257 case 'o':
258 outfilename = optarg;
259 break;
260 case 'h':
261 usage();
262 default:
263 break;
264 }
265 }
266
267 if (argc - optind < 2)
268 usage();
269
270 if (outfilename == NULL)
271 outfilename = argv[argc-1];
272 out = TIFFOpen(outfilename, "w");
273 if (out == NULL) {
274 TIFFError(infilename, "Cannot open file %s for output",
275 outfilename);
276 goto bad3;
277 }
278
279
280 while (optind < argc-1) {
281 infilename = argv[optind];
282 optind++;
283
284 fd = open(infilename, O_RDONLY|O_BINARY, 0);
285 if (fd < 0) {
286 TIFFError(infilename, "Cannot open input file");
287 return -1;
288 }
289
290 read(fd, file_hdr.bType, 2);
291 if(file_hdr.bType[0] != 'B' || file_hdr.bType[1] != 'M') {
292 TIFFError(infilename, "File is not BMP");
293 goto bad;
294 }
295
296/* -------------------------------------------------------------------- */
297/* Read the BMPFileHeader. We need iOffBits value only */
298/* -------------------------------------------------------------------- */
299 lseek(fd, 10, SEEK_SET);
300 read(fd, &file_hdr.iOffBits, 4);
301#ifdef WORDS_BIGENDIAN
302 TIFFSwabLong(&file_hdr.iOffBits);
303#endif
304 fstat(fd, &instat);
305 file_hdr.iSize = instat.st_size;
306
307/* -------------------------------------------------------------------- */
308/* Read the BMPInfoHeader. */
309/* -------------------------------------------------------------------- */
310
311 lseek(fd, BFH_SIZE, SEEK_SET);
312 read(fd, &info_hdr.iSize, 4);
313#ifdef WORDS_BIGENDIAN
314 TIFFSwabLong(&info_hdr.iSize);
315#endif
316
317 if (info_hdr.iSize == BIH_WIN4SIZE)
318 bmp_type = BMPT_WIN4;
319 else if (info_hdr.iSize == BIH_OS21SIZE)
320 bmp_type = BMPT_OS21;
321 else if (info_hdr.iSize == BIH_OS22SIZE
322 || info_hdr.iSize == 16)
323 bmp_type = BMPT_OS22;
324 else
325 bmp_type = BMPT_WIN5;
326
327 if (bmp_type == BMPT_WIN4
328 || bmp_type == BMPT_WIN5
329 || bmp_type == BMPT_OS22) {
330 read(fd, &info_hdr.iWidth, 4);
331 read(fd, &info_hdr.iHeight, 4);
332 read(fd, &info_hdr.iPlanes, 2);
333 read(fd, &info_hdr.iBitCount, 2);
334 read(fd, &info_hdr.iCompression, 4);
335 read(fd, &info_hdr.iSizeImage, 4);
336 read(fd, &info_hdr.iXPelsPerMeter, 4);
337 read(fd, &info_hdr.iYPelsPerMeter, 4);
338 read(fd, &info_hdr.iClrUsed, 4);
339 read(fd, &info_hdr.iClrImportant, 4);
340#ifdef WORDS_BIGENDIAN
341 TIFFSwabLong((uint32*) &info_hdr.iWidth);
342 TIFFSwabLong((uint32*) &info_hdr.iHeight);
343 TIFFSwabShort((uint16*) &info_hdr.iPlanes);
344 TIFFSwabShort((uint16*) &info_hdr.iBitCount);
345 TIFFSwabLong((uint32*) &info_hdr.iCompression);
346 TIFFSwabLong((uint32*) &info_hdr.iSizeImage);
347 TIFFSwabLong((uint32*) &info_hdr.iXPelsPerMeter);
348 TIFFSwabLong((uint32*) &info_hdr.iYPelsPerMeter);
349 TIFFSwabLong((uint32*) &info_hdr.iClrUsed);
350 TIFFSwabLong((uint32*) &info_hdr.iClrImportant);
351#endif
352 n_clr_elems = 4;
353 }
354
355 if (bmp_type == BMPT_OS22) {
356 /*
357 * FIXME: different info in different documents
358 * regarding this!
359 */
360 n_clr_elems = 3;
361 }
362
363 if (bmp_type == BMPT_OS21) {
364 int16 iShort;
365
366 read(fd, &iShort, 2);
367#ifdef WORDS_BIGENDIAN
368 TIFFSwabShort((uint16*) &iShort);
369#endif
370 info_hdr.iWidth = iShort;
371 read(fd, &iShort, 2);
372#ifdef WORDS_BIGENDIAN
373 TIFFSwabShort((uint16*) &iShort);
374#endif
375 info_hdr.iHeight = iShort;
376 read(fd, &iShort, 2);
377#ifdef WORDS_BIGENDIAN
378 TIFFSwabShort((uint16*) &iShort);
379#endif
380 info_hdr.iPlanes = iShort;
381 read(fd, &iShort, 2);
382#ifdef WORDS_BIGENDIAN
383 TIFFSwabShort((uint16*) &iShort);
384#endif
385 info_hdr.iBitCount = iShort;
386 info_hdr.iCompression = BMPC_RGB;
387 n_clr_elems = 3;
388 }
389
390 if (info_hdr.iBitCount != 1 && info_hdr.iBitCount != 4 &&
391 info_hdr.iBitCount != 8 && info_hdr.iBitCount != 16 &&
392 info_hdr.iBitCount != 24 && info_hdr.iBitCount != 32) {
393 TIFFError(infilename,
394 "Cannot process BMP file with bit count %d",
395 info_hdr.iBitCount);
396 close(fd);
397 return 0;
398 }
399
400 width = info_hdr.iWidth;
401 length = (info_hdr.iHeight > 0) ? info_hdr.iHeight : -info_hdr.iHeight;
402
403 switch (info_hdr.iBitCount)
404 {
405 case 1:
406 case 4:
407 case 8:
408 nbands = 1;
409 depth = info_hdr.iBitCount;
410 photometric = PHOTOMETRIC_PALETTE;
411 /* Allocate memory for colour table and read it. */
412 if (info_hdr.iClrUsed)
413 clr_tbl_size =
414 ((uint32)(1<<depth)<info_hdr.iClrUsed)
415 ? (uint32) (1 << depth)
416 : info_hdr.iClrUsed;
417 else
418 clr_tbl_size = 1 << depth;
419 clr_tbl = (unsigned char *)
420 _TIFFmalloc(n_clr_elems * clr_tbl_size);
421 if (!clr_tbl) {
422 TIFFError(infilename,
423 "Can't allocate space for color table");
424 goto bad;
425 }
426
427 lseek(fd, BFH_SIZE + info_hdr.iSize, SEEK_SET);
428 read(fd, clr_tbl, n_clr_elems * clr_tbl_size);
429
430 red_tbl = (unsigned short*)
431 _TIFFmalloc(1<<depth * sizeof(unsigned short));
432 if (!red_tbl) {
433 TIFFError(infilename,
434 "Can't allocate space for red component table");
435 _TIFFfree(clr_tbl);
436 goto bad1;
437 }
438 green_tbl = (unsigned short*)
439 _TIFFmalloc(1<<depth * sizeof(unsigned short));
440 if (!green_tbl) {
441 TIFFError(infilename,
442 "Can't allocate space for green component table");
443 _TIFFfree(clr_tbl);
444 goto bad2;
445 }
446 blue_tbl = (unsigned short*)
447 _TIFFmalloc(1<<depth * sizeof(unsigned short));
448 if (!blue_tbl) {
449 TIFFError(infilename,
450 "Can't allocate space for blue component table");
451 _TIFFfree(clr_tbl);
452 goto bad3;
453 }
454
455 for(clr = 0; clr < clr_tbl_size; clr++) {
456 red_tbl[clr] = 257*clr_tbl[clr*n_clr_elems+2];
457 green_tbl[clr] = 257*clr_tbl[clr*n_clr_elems+1];
458 blue_tbl[clr] = 257*clr_tbl[clr*n_clr_elems];
459 }
460
461 _TIFFfree(clr_tbl);
462 break;
463 case 16:
464 case 24:
465 nbands = 3;
466 depth = info_hdr.iBitCount / nbands;
467 photometric = PHOTOMETRIC_RGB;
468 break;
469 case 32:
470 nbands = 3;
471 depth = 8;
472 photometric = PHOTOMETRIC_RGB;
473 break;
474 default:
475 break;
476 }
477
478/* -------------------------------------------------------------------- */
479/* Create output file. */
480/* -------------------------------------------------------------------- */
481
482 TIFFSetField(out, TIFFTAG_IMAGEWIDTH, width);
483 TIFFSetField(out, TIFFTAG_IMAGELENGTH, length);
484 TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
485 TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, nbands);
486 TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, depth);
487 TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
488 TIFFSetField(out, TIFFTAG_PHOTOMETRIC, photometric);
489 TIFFSetField(out, TIFFTAG_ROWSPERSTRIP,
490 TIFFDefaultStripSize(out, rowsperstrip));
491
492 if (red_tbl && green_tbl && blue_tbl) {
493 TIFFSetField(out, TIFFTAG_COLORMAP,
494 red_tbl, green_tbl, blue_tbl);
495 }
496
497 if (compression == (uint16) -1)
498 compression = COMPRESSION_PACKBITS;
499 TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
500 switch (compression) {
501 case COMPRESSION_JPEG:
502 if (photometric == PHOTOMETRIC_RGB
503 && jpegcolormode == JPEGCOLORMODE_RGB)
504 photometric = PHOTOMETRIC_YCBCR;
505 TIFFSetField(out, TIFFTAG_JPEGQUALITY, quality);
506 TIFFSetField(out, TIFFTAG_JPEGCOLORMODE, jpegcolormode);
507 break;
508 case COMPRESSION_LZW:
509 case COMPRESSION_DEFLATE:
510 if (predictor != 0)
511 TIFFSetField(out, TIFFTAG_PREDICTOR, predictor);
512 break;
513 }
514
515/* -------------------------------------------------------------------- */
516/* Read uncompressed image data. */
517/* -------------------------------------------------------------------- */
518
519 if (info_hdr.iCompression == BMPC_RGB) {
520 uint32 offset, size;
521 char *scanbuf;
522
523 /* XXX: Avoid integer overflow. We can calculate size
524 * in one step using
525 *
526 * size = ((width * info_hdr.iBitCount + 31) & ~31) / 8
527 *
528 * formulae, but we should check for overflow
529 * conditions during calculation.
530 */
531 size = width * info_hdr.iBitCount + 31;
532 if (!width || !info_hdr.iBitCount
533 || (size - 31) / info_hdr.iBitCount != width ) {
534 TIFFError(infilename,
535 "Wrong image parameters; can't "
536 "allocate space for scanline buffer");
537 goto bad3;
538 }
539 size = (size & ~31) / 8;
540
541 scanbuf = (char *) _TIFFmalloc(size);
542 if (!scanbuf) {
543 TIFFError(infilename,
544 "Can't allocate space for scanline buffer");
545 goto bad3;
546 }
547
548 for (row = 0; row < length; row++) {
549 if (info_hdr.iHeight > 0)
550 offset = file_hdr.iOffBits+(length-row-1)*size;
551 else
552 offset = file_hdr.iOffBits + row * size;
553 if (lseek(fd, offset, SEEK_SET) == (off_t)-1) {
554 TIFFError(infilename,
555 "scanline %lu: Seek error",
556 (unsigned long) row);
557 break;
558 }
559
560 if (read(fd, scanbuf, size) < 0) {
561 TIFFError(infilename,
562 "scanline %lu: Read error",
563 (unsigned long) row);
564 break;
565 }
566
567 rearrangePixels(scanbuf, width, info_hdr.iBitCount);
568
569 if (TIFFWriteScanline(out, scanbuf, row, 0)<0) {
570 TIFFError(infilename,
571 "scanline %lu: Write error",
572 (unsigned long) row);
573 break;
574 }
575 }
576
577 _TIFFfree(scanbuf);
578
579/* -------------------------------------------------------------------- */
580/* Read compressed image data. */
581/* -------------------------------------------------------------------- */
582
583 } else if ( info_hdr.iCompression == BMPC_RLE8
584 || info_hdr.iCompression == BMPC_RLE4 ) {
585 uint32 i, j, k, runlength;
586 uint32 compr_size, uncompr_size;
587 unsigned char *comprbuf;
588 unsigned char *uncomprbuf;
589
590 compr_size = file_hdr.iSize - file_hdr.iOffBits;
591 uncompr_size = width * length;
592 comprbuf = (unsigned char *) _TIFFmalloc( compr_size );
593 if (!comprbuf) {
594 TIFFError(infilename,
595 "Can't allocate space for compressed scanline buffer");
596 goto bad3;
597 }
598 uncomprbuf = (unsigned char *)_TIFFmalloc(uncompr_size);
599 if (!uncomprbuf) {
600 TIFFError(infilename,
601 "Can't allocate space for uncompressed scanline buffer");
602 goto bad3;
603 }
604
605 lseek(fd, file_hdr.iOffBits, SEEK_SET);
606 read(fd, comprbuf, compr_size);
607 i = 0;
608 j = 0;
609 if (info_hdr.iBitCount == 8) { /* RLE8 */
610 while(j < uncompr_size && i < compr_size) {
611 if ( comprbuf[i] ) {
612 runlength = comprbuf[i++];
613 while( runlength > 0
614 && j < uncompr_size
615 && i < compr_size ) {
616 uncomprbuf[j++] = comprbuf[i];
617 runlength--;
618 }
619 i++;
620 } else {
621 i++;
622 if (comprbuf[i] == 0) /* Next scanline */
623 i++;
624 else if (comprbuf[i] == 1) /* End of image */
625 break;
626 else if (comprbuf[i] == 2) { /* Move to... */
627 i++;
628 if (i < compr_size - 1) {
629 j+=comprbuf[i]+comprbuf[i+1]*width;
630 i += 2;
631 }
632 else
633 break;
634 } else { /* Absolute mode */
635 runlength = comprbuf[i++];
636 for (k = 0; k < runlength && j < uncompr_size && i < compr_size; k++)
637 uncomprbuf[j++] = comprbuf[i++];
638 if ( k & 0x01 )
639 i++;
640 }
641 }
642 }
643 }
644 else { /* RLE4 */
645 while( j < uncompr_size && i < compr_size ) {
646 if ( comprbuf[i] ) {
647 runlength = comprbuf[i++];
648 while( runlength > 0 && j < uncompr_size && i < compr_size ) {
649 if ( runlength & 0x01 )
650 uncomprbuf[j++] = (comprbuf[i] & 0xF0) >> 4;
651 else
652 uncomprbuf[j++] = comprbuf[i] & 0x0F;
653 runlength--;
654 }
655 i++;
656 } else {
657 i++;
658 if (comprbuf[i] == 0) /* Next scanline */
659 i++;
660 else if (comprbuf[i] == 1) /* End of image */
661 break;
662 else if (comprbuf[i] == 2) { /* Move to... */
663 i++;
664 if (i < compr_size - 1) {
665 j+=comprbuf[i]+comprbuf[i+1]*width;
666 i += 2;
667 }
668 else
669 break;
670 } else { /* Absolute mode */
671 runlength = comprbuf[i++];
672 for (k = 0; k < runlength && j < uncompr_size && i < compr_size; k++) {
673 if (k & 0x01)
674 uncomprbuf[j++] = comprbuf[i++] & 0x0F;
675 else
676 uncomprbuf[j++] = (comprbuf[i] & 0xF0) >> 4;
677 }
678 if (k & 0x01)
679 i++;
680 }
681 }
682 }
683 }
684
685 _TIFFfree(comprbuf);
686
687 for (row = 0; row < length; row++) {
688 if (TIFFWriteScanline(out,
689 uncomprbuf + (length - row - 1) * width,
690 row, 0) < 0) {
691 TIFFError(infilename,
692 "scanline %lu: Write error.\n",
693 (unsigned long) row);
694 }
695 }
696
697 _TIFFfree(uncomprbuf);
698 }
699 TIFFWriteDirectory(out);
700 if (blue_tbl) {
701 _TIFFfree(blue_tbl);
702 blue_tbl=NULL;
703 }
704 if (green_tbl) {
705 _TIFFfree(green_tbl);
706 green_tbl=NULL;
707 }
708 if (red_tbl) {
709 _TIFFfree(red_tbl);
710 red_tbl=NULL;
711 }
712 }
713
714bad3:
715 if (blue_tbl)
716 _TIFFfree(blue_tbl);
717bad2:
718 if (green_tbl)
719 _TIFFfree(green_tbl);
720bad1:
721 if (red_tbl)
722 _TIFFfree(red_tbl);
723bad:
724 close(fd);
725
726 if (out)
727 TIFFClose(out);
728 return 0;
729}
730
731/*
732 * Image data in BMP file stored in BGR (or ABGR) format. We should rearrange
733 * pixels to RGB (RGBA) format.
734 */
735static void
736rearrangePixels(char *buf, uint32 width, uint32 bit_count)
737{
738 char tmp;
739 uint32 i;
740
741 switch(bit_count) {
742 case 16: /* FIXME: need a sample file */
743 break;
744 case 24:
745 for (i = 0; i < width; i++, buf += 3) {
746 tmp = *buf;
747 *buf = *(buf + 2);
748 *(buf + 2) = tmp;
749 }
750 break;
751 case 32:
752 {
753 char *buf1 = buf;
754
755 for (i = 0; i < width; i++, buf += 4) {
756 tmp = *buf;
757 *buf1++ = *(buf + 2);
758 *buf1++ = *(buf + 1);
759 *buf1++ = tmp;
760 }
761 }
762 break;
763 default:
764 break;
765 }
766}
767
768static int
769processCompressOptions(char* opt)
770{
771 if (strcmp(opt, "none") == 0)
772 compression = COMPRESSION_NONE;
773 else if (strcmp(opt, "packbits") == 0)
774 compression = COMPRESSION_PACKBITS;
775 else if (strncmp(opt, "jpeg", 4) == 0) {
776 char* cp = strchr(opt, ':');
777
778 compression = COMPRESSION_JPEG;
779 while( cp )
780 {
781 if (isdigit((int)cp[1]))
782 quality = atoi(cp+1);
783 else if (cp[1] == 'r' )
784 jpegcolormode = JPEGCOLORMODE_RAW;
785 else
786 usage();
787
788 cp = strchr(cp+1,':');
789 }
790 } else if (strncmp(opt, "lzw", 3) == 0) {
791 char* cp = strchr(opt, ':');
792 if (cp)
793 predictor = atoi(cp+1);
794 compression = COMPRESSION_LZW;
795 } else if (strncmp(opt, "zip", 3) == 0) {
796 char* cp = strchr(opt, ':');
797 if (cp)
798 predictor = atoi(cp+1);
799 compression = COMPRESSION_DEFLATE;
800 } else
801 return (0);
802 return (1);
803}
804
805static char* stuff[] = {
806"bmp2tiff --- convert Windows BMP files to TIFF",
807"usage: bmp2tiff [options] input.bmp [input2.bmp ...] output.tif",
808"where options are:",
809" -r # make each strip have no more than # rows",
810"",
811" -c lzw[:opts] compress output with Lempel-Ziv & Welch encoding",
812" -c zip[:opts] compress output with deflate encoding",
813" -c jpeg[:opts]compress output with JPEG encoding",
814" -c packbits compress output with packbits encoding",
815" -c none use no compression algorithm on output",
816"",
817"JPEG options:",
818" # set compression quality level (0-100, default 75)",
819" r output color image as RGB rather than YCbCr",
820"For example, -c jpeg:r:50 to get JPEG-encoded RGB data with 50% comp. quality",
821"",
822"LZW and deflate options:",
823" # set predictor value",
824"For example, -c lzw:2 to get LZW-encoded data with horizontal differencing",
825" -o out.tif write output to out.tif",
826" -h this help message",
827NULL
828};
829
830static void
831usage(void)
832{
833 char buf[BUFSIZ];
834 int i;
835
836 setbuf(stderr, buf);
837 fprintf(stderr, "%s\n\n", TIFFGetVersion());
838 for (i = 0; stuff[i] != NULL; i++)
839 fprintf(stderr, "%s\n", stuff[i]);
840 exit(-1);
841}
842
843/* vim: set ts=8 sts=8 sw=8 noet: */
wxWidgets (Impactor)