9 tiff.c - implements reading and writing tiff files, uses io layer.
13 io_glue *ig = io_new_fd( fd );
14 i_img *im = i_readtiff_wiol(ig, -1); // no limit on how much is read
16 io_glue *ig = io_new_fd( fd );
17 return_code = i_writetiff_wiol(im, ig);
21 tiff.c implements the basic functions to read and write tiff files.
22 It uses the iolayer and needs either a seekable source or an entire
25 =head1 FUNCTION REFERENCE
27 Some of these functions are internal.
34 #define byteswap_macro(x) \
35 ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
36 (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
43 static struct tag_name text_tag_names[] =
45 { "tiff_documentname", TIFFTAG_DOCUMENTNAME, },
46 { "tiff_imagedescription", TIFFTAG_IMAGEDESCRIPTION, },
47 { "tiff_make", TIFFTAG_MAKE, },
48 { "tiff_model", TIFFTAG_MODEL, },
49 { "tiff_pagename", TIFFTAG_PAGENAME, },
50 { "tiff_software", TIFFTAG_SOFTWARE, },
51 { "tiff_datetime", TIFFTAG_DATETIME, },
52 { "tiff_artist", TIFFTAG_ARTIST, },
53 { "tiff_hostcomputer", TIFFTAG_HOSTCOMPUTER, },
56 static const int text_tag_count =
57 sizeof(text_tag_names) / sizeof(*text_tag_names);
59 static void error_handler(char const *module, char const *fmt, va_list ap) {
60 i_push_errorvf(0, fmt, ap);
63 #define WARN_BUFFER_LIMIT 10000
64 static char *warn_buffer = NULL;
65 static int warn_buffer_size = 0;
67 static void warn_handler(char const *module, char const *fmt, va_list ap) {
72 vsnprintf(buf, sizeof(buf), fmt, ap);
74 vsprintf(buf, fmt, ap);
76 if (!warn_buffer || strlen(warn_buffer)+strlen(buf)+2 > warn_buffer_size) {
77 int new_size = warn_buffer_size + strlen(buf) + 2;
78 char *old_buffer = warn_buffer;
79 if (new_size > WARN_BUFFER_LIMIT) {
80 new_size = WARN_BUFFER_LIMIT;
82 warn_buffer = myrealloc(warn_buffer, new_size);
83 if (!old_buffer) *warn_buffer = '\0';
84 warn_buffer_size = new_size;
86 if (strlen(warn_buffer)+strlen(buf)+2 <= warn_buffer_size) {
87 strcat(warn_buffer, buf);
88 strcat(warn_buffer, "\n");
92 static int save_tiff_tags(TIFF *tif, i_img *im);
94 static void expand_4bit_hl(unsigned char *buf, int count);
96 static void pack_4bit_hl(unsigned char *buf, int count);
99 static toff_t sizeproc(thandle_t x) {
105 =item comp_seek(h, o, w)
107 Compatability for 64 bit systems like latest freebsd (internal)
109 h - tiff handle, cast an io_glue object
118 comp_seek(thandle_t h, toff_t o, int w) {
119 io_glue *ig = (io_glue*)h;
120 return (toff_t) ig->seekcb(ig, o, w);
124 =item comp_mmap(thandle_t, tdata_t*, toff_t*)
128 This shouldn't ever be called but newer tifflibs want it anyway.
135 comp_mmap(thandle_t h, tdata_t*p, toff_t*off) {
140 =item comp_munmap(thandle_t h, tdata_t p, toff_t off)
144 This shouldn't ever be called but newer tifflibs want it anyway.
150 comp_munmap(thandle_t h, tdata_t p, toff_t off) {
154 static i_img *read_one_tiff(TIFF *tif) {
156 uint32 width, height;
158 uint32* raster = NULL;
162 int gotXres, gotYres;
164 uint16 bits_per_sample;
170 TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &width);
171 TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &height);
172 TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &channels);
173 tiled = TIFFIsTiled(tif);
174 TIFFGetFieldDefaulted(tif, TIFFTAG_PHOTOMETRIC, &photometric);
175 TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE, &bits_per_sample);
177 mm_log((1, "i_readtiff_wiol: width=%d, height=%d, channels=%d\n", width, height, channels));
178 mm_log((1, "i_readtiff_wiol: %stiled\n", tiled?"":"not "));
179 mm_log((1, "i_readtiff_wiol: %sbyte swapped\n", TIFFIsByteSwapped(tif)?"":"not "));
181 if (photometric == PHOTOMETRIC_PALETTE && bits_per_sample <= 8) {
183 im = i_img_pal_new(width, height, channels, 256);
186 im = i_img_empty_ch(NULL, width, height, channels);
192 /* resolution tags */
193 TIFFGetFieldDefaulted(tif, TIFFTAG_RESOLUTIONUNIT, &resunit);
194 gotXres = TIFFGetField(tif, TIFFTAG_XRESOLUTION, &xres);
195 gotYres = TIFFGetField(tif, TIFFTAG_YRESOLUTION, &yres);
196 if (gotXres || gotYres) {
201 i_tags_addn(&im->tags, "tiff_resolutionunit", 0, resunit);
202 if (resunit == RESUNIT_CENTIMETER) {
203 /* from dots per cm to dpi */
206 i_tags_add(&im->tags, "tiff_resolutionunit_name", 0, "centimeter", -1, 0);
208 else if (resunit == RESUNIT_NONE) {
209 i_tags_addn(&im->tags, "i_aspect_only", 0, 1);
210 i_tags_add(&im->tags, "tiff_resolutionunit_name", 0, "none", -1, 0);
212 else if (resunit == RESUNIT_INCH) {
213 i_tags_add(&im->tags, "tiff_resolutionunit_name", 0, "inch", -1, 0);
216 i_tags_add(&im->tags, "tiff_resolutionunit_name", 0, "unknown", -1, 0);
218 /* tifflib doesn't seem to provide a way to get to the original rational
219 value of these, which would let me provide a more reasonable
220 precision. So make up a number. */
221 i_tags_set_float2(&im->tags, "i_xres", 0, xres, 6);
222 i_tags_set_float2(&im->tags, "i_yres", 0, yres, 6);
226 for (i = 0; i < text_tag_count; ++i) {
228 if (TIFFGetField(tif, text_tag_names[i].tag, &data)) {
229 mm_log((1, "i_readtiff_wiol: tag %d has value %s\n",
230 text_tag_names[i].tag, data));
231 i_tags_add(&im->tags, text_tag_names[i].name, 0, data,
236 i_tags_add(&im->tags, "i_format", 0, "tiff", -1, 0);
237 if (warn_buffer && *warn_buffer) {
238 i_tags_add(&im->tags, "i_warning", 0, warn_buffer, -1, 0);
242 /* TIFFPrintDirectory(tif, stdout, 0); good for debugging */
244 if (photometric == PHOTOMETRIC_PALETTE &&
245 (bits_per_sample == 4 || bits_per_sample == 8)) {
250 unsigned char *buffer;
252 if (!TIFFGetField(tif, TIFFTAG_COLORMAP, maps+0, maps+1, maps+2)) {
253 i_push_error(0, "Cannot get colormap for paletted image");
257 buffer = (unsigned char *)_TIFFmalloc(width+2);
259 i_push_error(0, "out of memory");
264 memset(used, 0, sizeof(used));
265 while (row < height && TIFFReadScanline(tif, buffer, row, 0) > 0) {
266 if (bits_per_sample == 4)
267 expand_4bit_hl(buffer, (width+1)/2);
268 for (col = 0; col < width; ++col) {
269 used[buffer[col]] = 1;
271 i_ppal(im, 0, width, row, buffer);
277 /* Ideally we'd optimize the palette, but that could be expensive
278 since we'd have to re-index every pixel.
280 Optimizing the palette (even at this level) might not
281 be what the user wants, so I don't do it.
283 We'll add a function to optimize a paletted image instead.
285 maxused = (1 << bits_per_sample)-1;
287 while (maxused >= 0 && !used[maxused])
290 for (i = 0; i < 1 << bits_per_sample; ++i) {
292 for (ch = 0; ch < 3; ++ch) {
293 c.channel[ch] = Sample16To8(maps[ch][i]);
295 i_addcolors(im, &c, 1);
303 uint32 tile_width, tile_height;
305 TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tile_width);
306 TIFFGetField(tif, TIFFTAG_TILELENGTH, &tile_height);
307 mm_log((1, "i_readtiff_wiol: tile_width=%d, tile_height=%d\n", tile_width, tile_height));
309 raster = (uint32*)_TIFFmalloc(tile_width * tile_height * sizeof (uint32));
312 i_push_error(0, "No space for raster buffer");
316 for( row = 0; row < height; row += tile_height ) {
317 for( col = 0; ok && col < width; col += tile_width ) {
318 uint32 i_row, x, newrows, newcols;
320 /* Read the tile into an RGBA array */
321 if (!TIFFReadRGBATile(tif, col, row, raster)) {
325 newrows = (row+tile_height > height) ? height-row : tile_height;
326 mm_log((1, "i_readtiff_wiol: newrows=%d\n", newrows));
327 newcols = (col+tile_width > width ) ? width-row : tile_width;
328 for( i_row = 0; i_row < tile_height; i_row++ ) {
329 for(x = 0; x < newcols; x++) {
331 uint32 temp = raster[x+tile_width*(tile_height-i_row-1)];
332 val.rgba.r = TIFFGetR(temp);
333 val.rgba.g = TIFFGetG(temp);
334 val.rgba.b = TIFFGetB(temp);
335 val.rgba.a = TIFFGetA(temp);
336 i_ppix(im, col+x, row+i_row, &val);
342 uint32 rowsperstrip, row;
343 int rc = TIFFGetField(tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip);
344 mm_log((1, "i_readtiff_wiol: rowsperstrip=%d rc = %d\n", rowsperstrip, rc));
346 if (rc != 1 || rowsperstrip==-1) {
347 rowsperstrip = height;
350 raster = (uint32*)_TIFFmalloc(width * rowsperstrip * sizeof (uint32));
353 i_push_error(0, "No space for raster buffer");
357 for( row = 0; row < height; row += rowsperstrip ) {
358 uint32 newrows, i_row;
360 if (!TIFFReadRGBAStrip(tif, row, raster)) {
365 newrows = (row+rowsperstrip > height) ? height-row : rowsperstrip;
366 mm_log((1, "newrows=%d\n", newrows));
368 for( i_row = 0; i_row < newrows; i_row++ ) {
370 for(x = 0; x<width; x++) {
372 uint32 temp = raster[x+width*(newrows-i_row-1)];
373 val.rgba.r = TIFFGetR(temp);
374 val.rgba.g = TIFFGetG(temp);
375 val.rgba.b = TIFFGetB(temp);
376 val.rgba.a = TIFFGetA(temp);
377 i_ppix(im, x, i_row+row, &val);
384 mm_log((1, "i_readtiff_wiol: error during reading\n"));
385 i_tags_addn(&im->tags, "i_incomplete", 0, 1);
394 =item i_readtiff_wiol(im, ig)
399 i_readtiff_wiol(io_glue *ig, int length) {
401 TIFFErrorHandler old_handler;
402 TIFFErrorHandler old_warn_handler;
406 old_handler = TIFFSetErrorHandler(error_handler);
407 old_warn_handler = TIFFSetWarningHandler(warn_handler);
411 /* Add code to get the filename info from the iolayer */
412 /* Also add code to check for mmapped code */
414 io_glue_commit_types(ig);
415 mm_log((1, "i_readtiff_wiol(ig %p, length %d)\n", ig, length));
417 tif = TIFFClientOpen("(Iolayer)",
420 (TIFFReadWriteProc) ig->readcb,
421 (TIFFReadWriteProc) ig->writecb,
422 (TIFFSeekProc) comp_seek,
423 (TIFFCloseProc) ig->closecb,
424 ig->sizecb ? (TIFFSizeProc) ig->sizecb : (TIFFSizeProc) sizeproc,
425 (TIFFMapFileProc) comp_mmap,
426 (TIFFUnmapFileProc) comp_munmap);
429 mm_log((1, "i_readtiff_wiol: Unable to open tif file\n"));
430 i_push_error(0, "opening file");
431 TIFFSetErrorHandler(old_handler);
432 TIFFSetWarningHandler(old_warn_handler);
436 im = read_one_tiff(tif);
438 if (TIFFLastDirectory(tif)) mm_log((1, "Last directory of tiff file\n"));
439 TIFFSetErrorHandler(old_handler);
440 TIFFSetWarningHandler(old_warn_handler);
446 =item i_readtiff_multi_wiol(ig, length, *count)
448 Reads multiple images from a TIFF.
453 i_readtiff_multi_wiol(io_glue *ig, int length, int *count) {
455 TIFFErrorHandler old_handler;
456 TIFFErrorHandler old_warn_handler;
457 i_img **results = NULL;
458 int result_alloc = 0;
462 old_handler = TIFFSetErrorHandler(error_handler);
463 old_warn_handler = TIFFSetWarningHandler(warn_handler);
467 /* Add code to get the filename info from the iolayer */
468 /* Also add code to check for mmapped code */
470 io_glue_commit_types(ig);
471 mm_log((1, "i_readtiff_wiol(ig %p, length %d)\n", ig, length));
473 tif = TIFFClientOpen("(Iolayer)",
476 (TIFFReadWriteProc) ig->readcb,
477 (TIFFReadWriteProc) ig->writecb,
478 (TIFFSeekProc) comp_seek,
479 (TIFFCloseProc) ig->closecb,
480 ig->sizecb ? (TIFFSizeProc) ig->sizecb : (TIFFSizeProc) sizeproc,
481 (TIFFMapFileProc) comp_mmap,
482 (TIFFUnmapFileProc) comp_munmap);
485 mm_log((1, "i_readtiff_wiol: Unable to open tif file\n"));
486 i_push_error(0, "opening file");
487 TIFFSetErrorHandler(old_handler);
488 TIFFSetWarningHandler(old_warn_handler);
494 i_img *im = read_one_tiff(tif);
497 if (++*count > result_alloc) {
498 if (result_alloc == 0) {
500 results = mymalloc(result_alloc * sizeof(i_img *));
505 newresults = myrealloc(results, result_alloc * sizeof(i_img *));
507 i_img_destroy(im); /* don't leak it */
510 results = newresults;
513 results[*count-1] = im;
514 } while (TIFFSetDirectory(tif, ++dirnum));
516 TIFFSetWarningHandler(old_warn_handler);
517 TIFFSetErrorHandler(old_handler);
523 i_writetiff_low_faxable(TIFF *tif, i_img *im, int fine) {
524 uint32 width, height;
525 unsigned char *linebuf = NULL;
530 float vres = fine ? 196 : 98;
536 switch (im->channels) {
546 /* This means a colorspace we don't handle yet */
547 mm_log((1, "i_writetiff_wiol_faxable: don't handle %d channel images.\n", im->channels));
551 /* Add code to get the filename info from the iolayer */
552 /* Also add code to check for mmapped code */
555 mm_log((1, "i_writetiff_wiol_faxable: width=%d, height=%d, channels=%d\n", width, height, im->channels));
557 if (!TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, width) )
558 { mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField width=%d failed\n", width)); return 0; }
559 if (!TIFFSetField(tif, TIFFTAG_IMAGELENGTH, height) )
560 { mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField length=%d failed\n", height)); return 0; }
561 if (!TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1))
562 { mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField samplesperpixel=1 failed\n")); return 0; }
563 if (!TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT))
564 { mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField Orientation=topleft\n")); return 0; }
565 if (!TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 1) )
566 { mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField bitpersample=1\n")); return 0; }
567 if (!TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG))
568 { mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField planarconfig\n")); return 0; }
569 if (!TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK))
570 { mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField photometric=%d\n", PHOTOMETRIC_MINISBLACK)); return 0; }
571 if (!TIFFSetField(tif, TIFFTAG_COMPRESSION, 3))
572 { mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField compression=3\n")); return 0; }
574 linebuf = (unsigned char *)_TIFFmalloc( TIFFScanlineSize(tif) );
576 if (!TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tif, -1))) {
577 mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField rowsperstrip=-1\n")); return 0; }
579 TIFFGetField(tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip);
580 TIFFGetField(tif, TIFFTAG_ROWSPERSTRIP, &rc);
582 mm_log((1, "i_writetiff_wiol_faxable: TIFFGetField rowsperstrip=%d\n", rowsperstrip));
583 mm_log((1, "i_writetiff_wiol_faxable: TIFFGetField scanlinesize=%d\n", TIFFScanlineSize(tif) ));
584 mm_log((1, "i_writetiff_wiol_faxable: TIFFGetField planarconfig=%d == %d\n", rc, PLANARCONFIG_CONTIG));
586 if (!TIFFSetField(tif, TIFFTAG_XRESOLUTION, (float)204))
587 { mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField Xresolution=204\n")); return 0; }
588 if (!TIFFSetField(tif, TIFFTAG_YRESOLUTION, vres))
589 { mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField Yresolution=196\n")); return 0; }
590 if (!TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH)) {
591 mm_log((1, "i_writetiff_wiol_faxable: TIFFSetField ResolutionUnit=%d\n", RESUNIT_INCH)); return 0;
594 if (!save_tiff_tags(tif, im)) {
598 for (y=0; y<height; y++) {
600 for(x=0; x<width; x+=8) {
605 linebuf[linebufpos]=0;
606 bits = width-x; if(bits>8) bits=8;
607 i_gsamp(im, x, x+8, y, luma, &luma_chan, 1);
608 for(bitpos=0;bitpos<bits;bitpos++) {
609 linebuf[linebufpos] |= ((luma[bitpos]>=128)?bitval:0);
614 if (TIFFWriteScanline(tif, linebuf, y, 0) < 0) {
615 mm_log((1, "i_writetiff_wiol_faxable: TIFFWriteScanline failed.\n"));
619 if (linebuf) _TIFFfree(linebuf);
625 i_writetiff_low(TIFF *tif, i_img *im) {
626 uint32 width, height;
628 uint16 predictor = 0;
630 int jpegcolormode = JPEGCOLORMODE_RGB;
631 uint16 compression = COMPRESSION_PACKBITS;
634 uint32 rowsperstrip = (uint32) -1; /* Let library pick default */
635 unsigned char *linebuf = NULL;
640 int got_xres, got_yres, aspect_only, resunit;
642 uint16 bitspersample = 8;
643 uint16 samplesperpixel;
644 uint16 *colors = NULL;
648 channels = im->channels;
652 photometric = PHOTOMETRIC_MINISBLACK;
655 photometric = PHOTOMETRIC_RGB;
656 if (compression == COMPRESSION_JPEG && jpegcolormode == JPEGCOLORMODE_RGB) photometric = PHOTOMETRIC_YCBCR;
657 else if (im->type == i_palette_type) {
658 photometric = PHOTOMETRIC_PALETTE;
662 /* This means a colorspace we don't handle yet */
663 mm_log((1, "i_writetiff_wiol: don't handle %d channel images.\n", channels));
667 /* Add code to get the filename info from the iolayer */
668 /* Also add code to check for mmapped code */
670 /*io_glue_commit_types(ig);*/
671 /*mm_log((1, "i_writetiff_wiol(im 0x%p, ig 0x%p)\n", im, ig));*/
673 mm_log((1, "i_writetiff_low: width=%d, height=%d, channels=%d\n", width, height, channels));
675 if (!TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, width) ) {
676 mm_log((1, "i_writetiff_wiol: TIFFSetField width=%d failed\n", width));
679 if (!TIFFSetField(tif, TIFFTAG_IMAGELENGTH, height) ) {
680 mm_log((1, "i_writetiff_wiol: TIFFSetField length=%d failed\n", height));
683 if (!TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT)) {
684 mm_log((1, "i_writetiff_wiol: TIFFSetField Orientation=topleft\n"));
687 if (!TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG)) {
688 mm_log((1, "i_writetiff_wiol: TIFFSetField planarconfig\n"));
691 if (!TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, photometric)) {
692 mm_log((1, "i_writetiff_wiol: TIFFSetField photometric=%d\n", photometric));
695 if (!TIFFSetField(tif, TIFFTAG_COMPRESSION, compression)) {
696 mm_log((1, "i_writetiff_wiol: TIFFSetField compression=%d\n", compression));
699 samplesperpixel = channels;
700 if (photometric == PHOTOMETRIC_PALETTE) {
703 int count = i_colorcount(im);
712 size = 1 << bitspersample;
713 colors = (uint16 *)_TIFFmalloc(sizeof(uint16) * 3 * size);
715 out[1] = colors + size;
716 out[2] = colors + 2 * size;
718 for (i = 0; i < count; ++i) {
719 i_getcolors(im, i, &c, 1);
720 for (ch = 0; ch < 3; ++ch)
721 out[ch][i] = c.channel[ch] * 257;
723 for (; i < size; ++i) {
724 for (ch = 0; ch < 3; ++ch)
727 if (!TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bitspersample)) {
728 mm_log((1, "i_writetiff_wiol: TIFFSetField bitpersample=%d\n",
732 if (!TIFFSetField(tif, TIFFTAG_COLORMAP, out[0], out[1], out[2])) {
733 mm_log((1, "i_writetiff_wiol: TIFFSetField colormap\n"));
738 if (!TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bitspersample)) {
739 mm_log((1, "i_writetiff_wiol: TIFFSetField bitpersample=%d\n",
744 if (!TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, samplesperpixel)) {
745 mm_log((1, "i_writetiff_wiol: TIFFSetField samplesperpixel=%d failed\n", samplesperpixel));
749 switch (compression) {
750 case COMPRESSION_JPEG:
751 mm_log((1, "i_writetiff_wiol: jpeg compression\n"));
752 if (!TIFFSetField(tif, TIFFTAG_JPEGQUALITY, quality) ) {
753 mm_log((1, "i_writetiff_wiol: TIFFSetField jpegquality=%d\n", quality));
756 if (!TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, jpegcolormode)) {
757 mm_log((1, "i_writetiff_wiol: TIFFSetField jpegcolormode=%d\n", jpegcolormode));
761 case COMPRESSION_LZW:
762 mm_log((1, "i_writetiff_wiol: lzw compression\n"));
764 case COMPRESSION_DEFLATE:
765 mm_log((1, "i_writetiff_wiol: deflate compression\n"));
767 if (!TIFFSetField(tif, TIFFTAG_PREDICTOR, predictor)) {
768 mm_log((1, "i_writetiff_wiol: TIFFSetField predictor=%d\n", predictor));
772 case COMPRESSION_PACKBITS:
773 mm_log((1, "i_writetiff_wiol: packbits compression\n"));
776 mm_log((1, "i_writetiff_wiol: unknown compression %d\n", compression));
780 linebytes = channels * width;
781 linebytes = TIFFScanlineSize(tif) > linebytes ? linebytes
782 : TIFFScanlineSize(tif);
783 /* working space for the scanlines - we go from 8-bit/pixel to 4 */
784 if (photometric == PHOTOMETRIC_PALETTE && bitspersample == 4)
785 linebytes += linebytes + 1;
786 linebuf = (unsigned char *)_TIFFmalloc(linebytes);
788 if (!TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tif, rowsperstrip))) {
789 mm_log((1, "i_writetiff_wiol: TIFFSetField rowsperstrip=%d\n", rowsperstrip)); return 0; }
791 TIFFGetField(tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip);
792 TIFFGetField(tif, TIFFTAG_ROWSPERSTRIP, &rc);
794 mm_log((1, "i_writetiff_wiol: TIFFGetField rowsperstrip=%d\n", rowsperstrip));
795 mm_log((1, "i_writetiff_wiol: TIFFGetField scanlinesize=%d\n", TIFFScanlineSize(tif) ));
796 mm_log((1, "i_writetiff_wiol: TIFFGetField planarconfig=%d == %d\n", rc, PLANARCONFIG_CONTIG));
797 mm_log((1, "i_writetiff_wiol: bitspersample = %d\n", bitspersample));
799 got_xres = i_tags_get_float(&im->tags, "i_xres", 0, &xres);
800 got_yres = i_tags_get_float(&im->tags, "i_yres", 0, &yres);
801 if (!i_tags_get_int(&im->tags, "i_aspect_only", 0,&aspect_only))
803 if (!i_tags_get_int(&im->tags, "tiff_resolutionunit", 0, &resunit))
804 resunit = RESUNIT_INCH;
805 if (got_xres || got_yres) {
811 resunit = RESUNIT_NONE;
814 if (resunit == RESUNIT_CENTIMETER) {
819 resunit = RESUNIT_INCH;
822 if (!TIFFSetField(tif, TIFFTAG_XRESOLUTION, (float)xres)) {
823 i_push_error(0, "cannot set TIFFTAG_XRESOLUTION tag");
826 if (!TIFFSetField(tif, TIFFTAG_YRESOLUTION, (float)yres)) {
827 i_push_error(0, "cannot set TIFFTAG_YRESOLUTION tag");
830 if (!TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, (uint16)resunit)) {
831 i_push_error(0, "cannot set TIFFTAG_RESOLUTIONUNIT tag");
836 if (!save_tiff_tags(tif, im)) {
840 if (photometric == PHOTOMETRIC_PALETTE) {
841 for (y = 0; y < height; ++y) {
842 i_gpal(im, 0, width, y, linebuf);
843 if (bitspersample == 4)
844 pack_4bit_hl(linebuf, width);
845 if (TIFFWriteScanline(tif, linebuf, y, 0) < 0) {
846 mm_log((1, "i_writetiff_wiol: TIFFWriteScanline failed.\n"));
847 if (linebuf) _TIFFfree(linebuf);
848 if (colors) _TIFFfree(colors);
854 for (y=0; y<height; y++) {
856 for(x=0; x<width; x++) {
857 (void) i_gpix(im, x, y,&val);
858 for(ch=0; ch<channels; ch++)
859 linebuf[ci++] = val.channel[ch];
861 if (TIFFWriteScanline(tif, linebuf, y, 0) < 0) {
862 mm_log((1, "i_writetiff_wiol: TIFFWriteScanline failed.\n"));
863 if (linebuf) _TIFFfree(linebuf);
864 if (colors) _TIFFfree(colors);
869 if (linebuf) _TIFFfree(linebuf);
870 if (colors) _TIFFfree(colors);
875 =item i_writetiff_multi_wiol(ig, imgs, count, fine_mode)
877 Stores an image in the iolayer object.
879 ig - io_object that defines source to write to
880 imgs,count - the images to write
886 i_writetiff_multi_wiol(io_glue *ig, i_img **imgs, int count) {
890 io_glue_commit_types(ig);
892 mm_log((1, "i_writetiff_multi_wiol(ig 0x%p, imgs 0x%p, count %d)\n",
895 /* FIXME: Enable the mmap interface */
897 tif = TIFFClientOpen("No name",
900 (TIFFReadWriteProc) ig->readcb,
901 (TIFFReadWriteProc) ig->writecb,
902 (TIFFSeekProc) comp_seek,
903 (TIFFCloseProc) ig->closecb,
904 ig->sizecb ? (TIFFSizeProc) ig->sizecb : (TIFFSizeProc) sizeproc,
905 (TIFFMapFileProc) comp_mmap,
906 (TIFFUnmapFileProc) comp_munmap);
911 mm_log((1, "i_writetiff_mulit_wiol: Unable to open tif file for writing\n"));
915 for (i = 0; i < count; ++i) {
916 if (!i_writetiff_low(tif, imgs[i])) {
921 if (!TIFFWriteDirectory(tif)) {
922 i_push_error(0, "Cannot write TIFF directory");
928 (void) TIFFClose(tif);
933 =item i_writetiff_multi_wiol_faxable(ig, imgs, count, fine_mode)
935 Stores an image in the iolayer object.
937 ig - io_object that defines source to write to
938 imgs,count - the images to write
939 fine_mode - select fine or normal mode fax images
946 i_writetiff_multi_wiol_faxable(io_glue *ig, i_img **imgs, int count, int fine) {
950 io_glue_commit_types(ig);
952 mm_log((1, "i_writetiff_multi_wiol(ig 0x%p, imgs 0x%p, count %d)\n",
955 /* FIXME: Enable the mmap interface */
957 tif = TIFFClientOpen("No name",
960 (TIFFReadWriteProc) ig->readcb,
961 (TIFFReadWriteProc) ig->writecb,
962 (TIFFSeekProc) comp_seek,
963 (TIFFCloseProc) ig->closecb,
964 ig->sizecb ? (TIFFSizeProc) ig->sizecb : (TIFFSizeProc) sizeproc,
965 (TIFFMapFileProc) comp_mmap,
966 (TIFFUnmapFileProc) comp_munmap);
971 mm_log((1, "i_writetiff_mulit_wiol: Unable to open tif file for writing\n"));
975 for (i = 0; i < count; ++i) {
976 if (!i_writetiff_low_faxable(tif, imgs[i], fine)) {
981 if (!TIFFWriteDirectory(tif)) {
982 i_push_error(0, "Cannot write TIFF directory");
988 (void) TIFFClose(tif);
993 =item i_writetiff_wiol(im, ig)
995 Stores an image in the iolayer object.
997 im - image object to write out
998 ig - io_object that defines source to write to
1003 i_writetiff_wiol(i_img *img, io_glue *ig) {
1006 io_glue_commit_types(ig);
1008 mm_log((1, "i_writetiff_wiol(img %p, ig 0x%p)\n", img, ig));
1010 /* FIXME: Enable the mmap interface */
1012 tif = TIFFClientOpen("No name",
1015 (TIFFReadWriteProc) ig->readcb,
1016 (TIFFReadWriteProc) ig->writecb,
1017 (TIFFSeekProc) comp_seek,
1018 (TIFFCloseProc) ig->closecb,
1019 ig->sizecb ? (TIFFSizeProc) ig->sizecb : (TIFFSizeProc) sizeproc,
1020 (TIFFMapFileProc) comp_mmap,
1021 (TIFFUnmapFileProc) comp_munmap);
1026 mm_log((1, "i_writetiff_wiol: Unable to open tif file for writing\n"));
1030 if (!i_writetiff_low(tif, img)) {
1035 (void) TIFFClose(tif);
1042 =item i_writetiff_wiol_faxable(i_img *, io_glue *)
1044 Stores an image in the iolayer object in faxable tiff format.
1046 im - image object to write out
1047 ig - io_object that defines source to write to
1049 Note, this may be rewritten to use to simply be a call to a
1050 lower-level function that gives more options for writing tiff at some
1057 i_writetiff_wiol_faxable(i_img *im, io_glue *ig, int fine) {
1060 io_glue_commit_types(ig);
1062 mm_log((1, "i_writetiff_wiol(img %p, ig 0x%p)\n", im, ig));
1064 /* FIXME: Enable the mmap interface */
1066 tif = TIFFClientOpen("No name",
1069 (TIFFReadWriteProc) ig->readcb,
1070 (TIFFReadWriteProc) ig->writecb,
1071 (TIFFSeekProc) comp_seek,
1072 (TIFFCloseProc) ig->closecb,
1073 ig->sizecb ? (TIFFSizeProc) ig->sizecb : (TIFFSizeProc) sizeproc,
1074 (TIFFMapFileProc) comp_mmap,
1075 (TIFFUnmapFileProc) comp_munmap);
1080 mm_log((1, "i_writetiff_wiol: Unable to open tif file for writing\n"));
1084 if (!i_writetiff_low_faxable(tif, im, fine)) {
1089 (void) TIFFClose(tif);
1093 static int save_tiff_tags(TIFF *tif, i_img *im) {
1096 for (i = 0; i < text_tag_count; ++i) {
1098 if (i_tags_find(&im->tags, text_tag_names[i].name, 0, &entry)) {
1099 if (!TIFFSetField(tif, text_tag_names[i].tag,
1100 im->tags.tags[entry].data)) {
1101 i_push_errorf(0, "cannot save %s to TIFF", text_tag_names[i].name);
1112 =item expand_4bit_hl(buf, count)
1114 Expands 4-bit/entry packed data into 1 byte/entry.
1116 buf must contain count bytes to be expanded and have 2*count bytes total
1119 The data is expanded in place.
1124 static void expand_4bit_hl(unsigned char *buf, int count) {
1125 while (--count >= 0) {
1126 buf[count*2+1] = buf[count] & 0xF;
1127 buf[count*2] = buf[count] >> 4;
1131 static void pack_4bit_hl(unsigned char *buf, int count) {
1134 buf[i/2] = (buf[i] << 4) + buf[i+1];
1144 Arnar M. Hrafnkelsson <addi@umich.edu>