source: liacs/MIR2010/SourceCode/cximage/tiff/tif_read.c@ 139

Last change on this file since 139 was 95, checked in by Rick van der Zwet, 15 years ago

Bad boy, improper move of directory
File size: 18.8 KB
Line 
1/* $Id: tif_read.c,v 1.13 2005/12/21 12:23:13 joris Exp $ */
2
3/*
4 * Copyright (c) 1988-1997 Sam Leffler
5 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and
8 * its documentation for any purpose is hereby granted without fee, provided
9 * that (i) the above copyright notices and this permission notice appear in
10 * all copies of the software and related documentation, and (ii) the names of
11 * Sam Leffler and Silicon Graphics may not be used in any advertising or
12 * publicity relating to the software without the specific, prior written
13 * permission of Sam Leffler and Silicon Graphics.
14 *
15 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
17 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
18 *
19 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
20 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
21 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
22 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
23 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 */
26
27/*
28 * TIFF Library.
29 * Scanline-oriented Read Support
30 */
31#include "tiffiop.h"
32#include <stdio.h>
33
34 int TIFFFillStrip(TIFF*, tstrip_t);
35 int TIFFFillTile(TIFF*, ttile_t);
36static int TIFFStartStrip(TIFF*, tstrip_t);
37static int TIFFStartTile(TIFF*, ttile_t);
38static int TIFFCheckRead(TIFF*, int);
39
40#define NOSTRIP ((tstrip_t) -1) /* undefined state */
41#define NOTILE ((ttile_t) -1) /* undefined state */
42
43/*
44 * Seek to a random row+sample in a file.
45 */
46static int
47TIFFSeek(TIFF* tif, uint32 row, tsample_t sample)
48{
49 register TIFFDirectory *td = &tif->tif_dir;
50 tstrip_t strip;
51
52 if (row >= td->td_imagelength) { /* out of range */
53 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%lu: Row out of range, max %lu",
54 (unsigned long) row, (unsigned long) td->td_imagelength);
55 return (0);
56 }
57 if (td->td_planarconfig == PLANARCONFIG_SEPARATE) {
58 if (sample >= td->td_samplesperpixel) {
59 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
60 "%lu: Sample out of range, max %lu",
61 (unsigned long) sample, (unsigned long) td->td_samplesperpixel);
62 return (0);
63 }
64 strip = sample*td->td_stripsperimage + row/td->td_rowsperstrip;
65 } else
66 strip = row / td->td_rowsperstrip;
67 if (strip != tif->tif_curstrip) { /* different strip, refill */
68 if (!TIFFFillStrip(tif, strip))
69 return (0);
70 } else if (row < tif->tif_row) {
71 /*
72 * Moving backwards within the same strip: backup
73 * to the start and then decode forward (below).
74 *
75 * NB: If you're planning on lots of random access within a
76 * strip, it's better to just read and decode the entire
77 * strip, and then access the decoded data in a random fashion.
78 */
79 if (!TIFFStartStrip(tif, strip))
80 return (0);
81 }
82 if (row != tif->tif_row) {
83 /*
84 * Seek forward to the desired row.
85 */
86 if (!(*tif->tif_seek)(tif, row - tif->tif_row))
87 return (0);
88 tif->tif_row = row;
89 }
90 return (1);
91}
92
93int
94TIFFReadScanline(TIFF* tif, tdata_t buf, uint32 row, tsample_t sample)
95{
96 int e;
97
98 if (!TIFFCheckRead(tif, 0))
99 return (-1);
100 if( (e = TIFFSeek(tif, row, sample)) != 0) {
101 /*
102 * Decompress desired row into user buffer.
103 */
104 e = (*tif->tif_decoderow)
105 (tif, (tidata_t) buf, tif->tif_scanlinesize, sample);
106
107 /* we are now poised at the beginning of the next row */
108 tif->tif_row = row + 1;
109
110 if (e)
111 (*tif->tif_postdecode)(tif, (tidata_t) buf,
112 tif->tif_scanlinesize);
113 }
114 return (e > 0 ? 1 : -1);
115}
116
117/*
118 * Read a strip of data and decompress the specified
119 * amount into the user-supplied buffer.
120 */
121tsize_t
122TIFFReadEncodedStrip(TIFF* tif, tstrip_t strip, tdata_t buf, tsize_t size)
123{
124 TIFFDirectory *td = &tif->tif_dir;
125 uint32 nrows;
126 tsize_t stripsize;
127 tstrip_t sep_strip, strips_per_sep;
128
129 if (!TIFFCheckRead(tif, 0))
130 return (-1);
131 if (strip >= td->td_nstrips) {
132 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%ld: Strip out of range, max %ld",
133 (long) strip, (long) td->td_nstrips);
134 return (-1);
135 }
136 /*
137 * Calculate the strip size according to the number of
138 * rows in the strip (check for truncated last strip on any
139 * of the separations).
140 */
141 if( td->td_rowsperstrip >= td->td_imagelength )
142 strips_per_sep = 1;
143 else
144 strips_per_sep = (td->td_imagelength+td->td_rowsperstrip-1)
145 / td->td_rowsperstrip;
146
147 sep_strip = strip % strips_per_sep;
148
149 if (sep_strip != strips_per_sep-1 ||
150 (nrows = td->td_imagelength % td->td_rowsperstrip) == 0)
151 nrows = td->td_rowsperstrip;
152
153 stripsize = TIFFVStripSize(tif, nrows);
154 if (size == (tsize_t) -1)
155 size = stripsize;
156 else if (size > stripsize)
157 size = stripsize;
158 if (TIFFFillStrip(tif, strip)
159 && (*tif->tif_decodestrip)(tif, (tidata_t) buf, size,
160 (tsample_t)(strip / td->td_stripsperimage)) > 0 ) {
161 (*tif->tif_postdecode)(tif, (tidata_t) buf, size);
162 return (size);
163 } else
164 return ((tsize_t) -1);
165}
166
167static tsize_t
168TIFFReadRawStrip1(TIFF* tif,
169 tstrip_t strip, tdata_t buf, tsize_t size, const char* module)
170{
171 TIFFDirectory *td = &tif->tif_dir;
172
173 if (!isMapped(tif)) {
174 tsize_t cc;
175
176 if (!SeekOK(tif, td->td_stripoffset[strip])) {
177 TIFFErrorExt(tif->tif_clientdata, module,
178 "%s: Seek error at scanline %lu, strip %lu",
179 tif->tif_name,
180 (unsigned long) tif->tif_row, (unsigned long) strip);
181 return (-1);
182 }
183 cc = TIFFReadFile(tif, buf, size);
184 if (cc != size) {
185 TIFFErrorExt(tif->tif_clientdata, module,
186 "%s: Read error at scanline %lu; got %lu bytes, expected %lu",
187 tif->tif_name,
188 (unsigned long) tif->tif_row,
189 (unsigned long) cc,
190 (unsigned long) size);
191 return (-1);
192 }
193 } else {
194 if (td->td_stripoffset[strip] + size > tif->tif_size) {
195 TIFFErrorExt(tif->tif_clientdata, module,
196 "%s: Read error at scanline %lu, strip %lu; got %lu bytes, expected %lu",
197 tif->tif_name,
198 (unsigned long) tif->tif_row,
199 (unsigned long) strip,
200 (unsigned long) tif->tif_size - td->td_stripoffset[strip],
201 (unsigned long) size);
202 return (-1);
203 }
204 _TIFFmemcpy(buf, tif->tif_base + td->td_stripoffset[strip],
205 size);
206 }
207 return (size);
208}
209
210/*
211 * Read a strip of data from the file.
212 */
213tsize_t
214TIFFReadRawStrip(TIFF* tif, tstrip_t strip, tdata_t buf, tsize_t size)
215{
216 static const char module[] = "TIFFReadRawStrip";
217 TIFFDirectory *td = &tif->tif_dir;
218 tsize_t bytecount;
219
220 if (!TIFFCheckRead(tif, 0))
221 return ((tsize_t) -1);
222 if (strip >= td->td_nstrips) {
223 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%lu: Strip out of range, max %lu",
224 (unsigned long) strip, (unsigned long) td->td_nstrips);
225 return ((tsize_t) -1);
226 }
227 bytecount = td->td_stripbytecount[strip];
228 if (bytecount <= 0) {
229 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
230 "%lu: Invalid strip byte count, strip %lu",
231 (unsigned long) bytecount, (unsigned long) strip);
232 return ((tsize_t) -1);
233 }
234 if (size != (tsize_t)-1 && size < bytecount)
235 bytecount = size;
236 return (TIFFReadRawStrip1(tif, strip, buf, bytecount, module));
237}
238
239/*
240 * Read the specified strip and setup for decoding.
241 * The data buffer is expanded, as necessary, to
242 * hold the strip's data.
243 */
244int
245TIFFFillStrip(TIFF* tif, tstrip_t strip)
246{
247 static const char module[] = "TIFFFillStrip";
248 TIFFDirectory *td = &tif->tif_dir;
249 tsize_t bytecount;
250
251 bytecount = td->td_stripbytecount[strip];
252 if (bytecount <= 0) {
253 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
254 "%lu: Invalid strip byte count, strip %lu",
255 (unsigned long) bytecount, (unsigned long) strip);
256 return (0);
257 }
258 if (isMapped(tif) &&
259 (isFillOrder(tif, td->td_fillorder)
260 || (tif->tif_flags & TIFF_NOBITREV))) {
261 /*
262 * The image is mapped into memory and we either don't
263 * need to flip bits or the compression routine is going
264 * to handle this operation itself. In this case, avoid
265 * copying the raw data and instead just reference the
266 * data from the memory mapped file image. This assumes
267 * that the decompression routines do not modify the
268 * contents of the raw data buffer (if they try to,
269 * the application will get a fault since the file is
270 * mapped read-only).
271 */
272 if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata)
273 _TIFFfree(tif->tif_rawdata);
274 tif->tif_flags &= ~TIFF_MYBUFFER;
275 if ( td->td_stripoffset[strip] + bytecount > tif->tif_size) {
276 /*
277 * This error message might seem strange, but it's
278 * what would happen if a read were done instead.
279 */
280 TIFFErrorExt(tif->tif_clientdata, module,
281 "%s: Read error on strip %lu; got %lu bytes, expected %lu",
282 tif->tif_name,
283 (unsigned long) strip,
284 (unsigned long) tif->tif_size - td->td_stripoffset[strip],
285 (unsigned long) bytecount);
286 tif->tif_curstrip = NOSTRIP;
287 return (0);
288 }
289 tif->tif_rawdatasize = bytecount;
290 tif->tif_rawdata = tif->tif_base + td->td_stripoffset[strip];
291 } else {
292 /*
293 * Expand raw data buffer, if needed, to
294 * hold data strip coming from file
295 * (perhaps should set upper bound on
296 * the size of a buffer we'll use?).
297 */
298 if (bytecount > tif->tif_rawdatasize) {
299 tif->tif_curstrip = NOSTRIP;
300 if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
301 TIFFErrorExt(tif->tif_clientdata, module,
302 "%s: Data buffer too small to hold strip %lu",
303 tif->tif_name, (unsigned long) strip);
304 return (0);
305 }
306 if (!TIFFReadBufferSetup(tif, 0,
307 TIFFroundup(bytecount, 1024)))
308 return (0);
309 }
310 if (TIFFReadRawStrip1(tif, strip, (unsigned char *)tif->tif_rawdata,
311 bytecount, module) != bytecount)
312 return (0);
313 if (!isFillOrder(tif, td->td_fillorder) &&
314 (tif->tif_flags & TIFF_NOBITREV) == 0)
315 TIFFReverseBits(tif->tif_rawdata, bytecount);
316 }
317 return (TIFFStartStrip(tif, strip));
318}
319
320/*
321 * Tile-oriented Read Support
322 * Contributed by Nancy Cam (Silicon Graphics).
323 */
324
325/*
326 * Read and decompress a tile of data. The
327 * tile is selected by the (x,y,z,s) coordinates.
328 */
329tsize_t
330TIFFReadTile(TIFF* tif,
331 tdata_t buf, uint32 x, uint32 y, uint32 z, tsample_t s)
332{
333 if (!TIFFCheckRead(tif, 1) || !TIFFCheckTile(tif, x, y, z, s))
334 return (-1);
335 return (TIFFReadEncodedTile(tif,
336 TIFFComputeTile(tif, x, y, z, s), buf, (tsize_t) -1));
337}
338
339/*
340 * Read a tile of data and decompress the specified
341 * amount into the user-supplied buffer.
342 */
343tsize_t
344TIFFReadEncodedTile(TIFF* tif, ttile_t tile, tdata_t buf, tsize_t size)
345{
346 TIFFDirectory *td = &tif->tif_dir;
347 tsize_t tilesize = tif->tif_tilesize;
348
349 if (!TIFFCheckRead(tif, 1))
350 return (-1);
351 if (tile >= td->td_nstrips) {
352 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%ld: Tile out of range, max %ld",
353 (long) tile, (unsigned long) td->td_nstrips);
354 return (-1);
355 }
356 if (size == (tsize_t) -1)
357 size = tilesize;
358 else if (size > tilesize)
359 size = tilesize;
360 if (TIFFFillTile(tif, tile) && (*tif->tif_decodetile)(tif,
361 (tidata_t) buf, size, (tsample_t)(tile/td->td_stripsperimage))) {
362 (*tif->tif_postdecode)(tif, (tidata_t) buf, size);
363 return (size);
364 } else
365 return (-1);
366}
367
368static tsize_t
369TIFFReadRawTile1(TIFF* tif,
370 ttile_t tile, tdata_t buf, tsize_t size, const char* module)
371{
372 TIFFDirectory *td = &tif->tif_dir;
373
374 if (!isMapped(tif)) {
375 tsize_t cc;
376
377 if (!SeekOK(tif, td->td_stripoffset[tile])) {
378 TIFFErrorExt(tif->tif_clientdata, module,
379 "%s: Seek error at row %ld, col %ld, tile %ld",
380 tif->tif_name,
381 (long) tif->tif_row,
382 (long) tif->tif_col,
383 (long) tile);
384 return ((tsize_t) -1);
385 }
386 cc = TIFFReadFile(tif, buf, size);
387 if (cc != size) {
388 TIFFErrorExt(tif->tif_clientdata, module,
389 "%s: Read error at row %ld, col %ld; got %lu bytes, expected %lu",
390 tif->tif_name,
391 (long) tif->tif_row,
392 (long) tif->tif_col,
393 (unsigned long) cc,
394 (unsigned long) size);
395 return ((tsize_t) -1);
396 }
397 } else {
398 if (td->td_stripoffset[tile] + size > tif->tif_size) {
399 TIFFErrorExt(tif->tif_clientdata, module,
400 "%s: Read error at row %ld, col %ld, tile %ld; got %lu bytes, expected %lu",
401 tif->tif_name,
402 (long) tif->tif_row,
403 (long) tif->tif_col,
404 (long) tile,
405 (unsigned long) tif->tif_size - td->td_stripoffset[tile],
406 (unsigned long) size);
407 return ((tsize_t) -1);
408 }
409 _TIFFmemcpy(buf, tif->tif_base + td->td_stripoffset[tile], size);
410 }
411 return (size);
412}
413
414/*
415 * Read a tile of data from the file.
416 */
417tsize_t
418TIFFReadRawTile(TIFF* tif, ttile_t tile, tdata_t buf, tsize_t size)
419{
420 static const char module[] = "TIFFReadRawTile";
421 TIFFDirectory *td = &tif->tif_dir;
422 tsize_t bytecount;
423
424 if (!TIFFCheckRead(tif, 1))
425 return ((tsize_t) -1);
426 if (tile >= td->td_nstrips) {
427 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%lu: Tile out of range, max %lu",
428 (unsigned long) tile, (unsigned long) td->td_nstrips);
429 return ((tsize_t) -1);
430 }
431 bytecount = td->td_stripbytecount[tile];
432 if (size != (tsize_t) -1 && size < bytecount)
433 bytecount = size;
434 return (TIFFReadRawTile1(tif, tile, buf, bytecount, module));
435}
436
437/*
438 * Read the specified tile and setup for decoding.
439 * The data buffer is expanded, as necessary, to
440 * hold the tile's data.
441 */
442int
443TIFFFillTile(TIFF* tif, ttile_t tile)
444{
445 static const char module[] = "TIFFFillTile";
446 TIFFDirectory *td = &tif->tif_dir;
447 tsize_t bytecount;
448
449 bytecount = td->td_stripbytecount[tile];
450 if (bytecount <= 0) {
451 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
452 "%lu: Invalid tile byte count, tile %lu",
453 (unsigned long) bytecount, (unsigned long) tile);
454 return (0);
455 }
456 if (isMapped(tif) &&
457 (isFillOrder(tif, td->td_fillorder)
458 || (tif->tif_flags & TIFF_NOBITREV))) {
459 /*
460 * The image is mapped into memory and we either don't
461 * need to flip bits or the compression routine is going
462 * to handle this operation itself. In this case, avoid
463 * copying the raw data and instead just reference the
464 * data from the memory mapped file image. This assumes
465 * that the decompression routines do not modify the
466 * contents of the raw data buffer (if they try to,
467 * the application will get a fault since the file is
468 * mapped read-only).
469 */
470 if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata)
471 _TIFFfree(tif->tif_rawdata);
472 tif->tif_flags &= ~TIFF_MYBUFFER;
473 if ( td->td_stripoffset[tile] + bytecount > tif->tif_size) {
474 tif->tif_curtile = NOTILE;
475 return (0);
476 }
477 tif->tif_rawdatasize = bytecount;
478 tif->tif_rawdata = tif->tif_base + td->td_stripoffset[tile];
479 } else {
480 /*
481 * Expand raw data buffer, if needed, to
482 * hold data tile coming from file
483 * (perhaps should set upper bound on
484 * the size of a buffer we'll use?).
485 */
486 if (bytecount > tif->tif_rawdatasize) {
487 tif->tif_curtile = NOTILE;
488 if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
489 TIFFErrorExt(tif->tif_clientdata, module,
490 "%s: Data buffer too small to hold tile %ld",
491 tif->tif_name, (long) tile);
492 return (0);
493 }
494 if (!TIFFReadBufferSetup(tif, 0,
495 TIFFroundup(bytecount, 1024)))
496 return (0);
497 }
498 if (TIFFReadRawTile1(tif, tile,
499 (unsigned char *)tif->tif_rawdata,
500 bytecount, module) != bytecount)
501 return (0);
502 if (!isFillOrder(tif, td->td_fillorder) &&
503 (tif->tif_flags & TIFF_NOBITREV) == 0)
504 TIFFReverseBits(tif->tif_rawdata, bytecount);
505 }
506 return (TIFFStartTile(tif, tile));
507}
508
509/*
510 * Setup the raw data buffer in preparation for
511 * reading a strip of raw data. If the buffer
512 * is specified as zero, then a buffer of appropriate
513 * size is allocated by the library. Otherwise,
514 * the client must guarantee that the buffer is
515 * large enough to hold any individual strip of
516 * raw data.
517 */
518int
519TIFFReadBufferSetup(TIFF* tif, tdata_t bp, tsize_t size)
520{
521 static const char module[] = "TIFFReadBufferSetup";
522
523 if (tif->tif_rawdata) {
524 if (tif->tif_flags & TIFF_MYBUFFER)
525 _TIFFfree(tif->tif_rawdata);
526 tif->tif_rawdata = NULL;
527 }
528 if (bp) {
529 tif->tif_rawdatasize = size;
530 tif->tif_rawdata = (tidata_t) bp;
531 tif->tif_flags &= ~TIFF_MYBUFFER;
532 } else {
533 tif->tif_rawdatasize = TIFFroundup(size, 1024);
534 tif->tif_rawdata = (tidata_t) _TIFFmalloc(tif->tif_rawdatasize);
535 tif->tif_flags |= TIFF_MYBUFFER;
536 }
537 if (tif->tif_rawdata == NULL) {
538 TIFFErrorExt(tif->tif_clientdata, module,
539 "%s: No space for data buffer at scanline %ld",
540 tif->tif_name, (long) tif->tif_row);
541 tif->tif_rawdatasize = 0;
542 return (0);
543 }
544 return (1);
545}
546
547/*
548 * Set state to appear as if a
549 * strip has just been read in.
550 */
551static int
552TIFFStartStrip(TIFF* tif, tstrip_t strip)
553{
554 TIFFDirectory *td = &tif->tif_dir;
555
556 if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
557 if (!(*tif->tif_setupdecode)(tif))
558 return (0);
559 tif->tif_flags |= TIFF_CODERSETUP;
560 }
561 tif->tif_curstrip = strip;
562 tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
563 tif->tif_rawcp = tif->tif_rawdata;
564 tif->tif_rawcc = td->td_stripbytecount[strip];
565 return ((*tif->tif_predecode)(tif,
566 (tsample_t)(strip / td->td_stripsperimage)));
567}
568
569/*
570 * Set state to appear as if a
571 * tile has just been read in.
572 */
573static int
574TIFFStartTile(TIFF* tif, ttile_t tile)
575{
576 TIFFDirectory *td = &tif->tif_dir;
577
578 if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
579 if (!(*tif->tif_setupdecode)(tif))
580 return (0);
581 tif->tif_flags |= TIFF_CODERSETUP;
582 }
583 tif->tif_curtile = tile;
584 tif->tif_row =
585 (tile % TIFFhowmany(td->td_imagewidth, td->td_tilewidth)) *
586 td->td_tilelength;
587 tif->tif_col =
588 (tile % TIFFhowmany(td->td_imagelength, td->td_tilelength)) *
589 td->td_tilewidth;
590 tif->tif_rawcp = tif->tif_rawdata;
591 tif->tif_rawcc = td->td_stripbytecount[tile];
592 return ((*tif->tif_predecode)(tif,
593 (tsample_t)(tile/td->td_stripsperimage)));
594}
595
596static int
597TIFFCheckRead(TIFF* tif, int tiles)
598{
599 if (tif->tif_mode == O_WRONLY) {
600 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "File not open for reading");
601 return (0);
602 }
603 if (tiles ^ isTiled(tif)) {
604 TIFFErrorExt(tif->tif_clientdata, tif->tif_name, tiles ?
605 "Can not read tiles from a stripped image" :
606 "Can not read scanlines from a tiled image");
607 return (0);
608 }
609 return (1);
610}
611
612void
613_TIFFNoPostDecode(TIFF* tif, tidata_t buf, tsize_t cc)
614{
615 (void) tif; (void) buf; (void) cc;
616}
617
618void
619_TIFFSwab16BitData(TIFF* tif, tidata_t buf, tsize_t cc)
620{
621 (void) tif;
622 assert((cc & 1) == 0);
623 TIFFSwabArrayOfShort((uint16*) buf, cc/2);
624}
625
626void
627_TIFFSwab24BitData(TIFF* tif, tidata_t buf, tsize_t cc)
628{
629 (void) tif;
630 assert((cc % 3) == 0);
631 TIFFSwabArrayOfTriples((uint8*) buf, cc/3);
632}
633
634void
635_TIFFSwab32BitData(TIFF* tif, tidata_t buf, tsize_t cc)
636{
637 (void) tif;
638 assert((cc & 3) == 0);
639 TIFFSwabArrayOfLong((uint32*) buf, cc/4);
640}
641
642void
643_TIFFSwab64BitData(TIFF* tif, tidata_t buf, tsize_t cc)
644{
645 (void) tif;
646 assert((cc & 7) == 0);
647 TIFFSwabArrayOfDouble((double*) buf, cc/8);
648}
649
650/* vim: set ts=8 sts=8 sw=8 noet: */
Note: See TracBrowser for help on using the repository browser.