Line data Source code
1 : /*
2 : * Copyright (c) 1997 Greg Ward Larson
3 : * Copyright (c) 1997 Silicon Graphics, Inc.
4 : *
5 : * Permission to use, copy, modify, distribute, and sell this software and
6 : * its documentation for any purpose is hereby granted without fee, provided
7 : * that (i) the above copyright notices and this permission notice appear in
8 : * all copies of the software and related documentation, and (ii) the names of
9 : * Sam Leffler, Greg Larson and Silicon Graphics may not be used in any
10 : * advertising or publicity relating to the software without the specific,
11 : * prior written permission of Sam Leffler, Greg Larson and Silicon Graphics.
12 : *
13 : * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
14 : * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 : * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
16 : *
17 : * IN NO EVENT SHALL SAM LEFFLER, GREG LARSON OR SILICON GRAPHICS BE LIABLE
18 : * FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
19 : * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 : * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
21 : * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
22 : * OF THIS SOFTWARE.
23 : */
24 :
25 : #include "tiffiop.h"
26 : #ifdef LOGLUV_SUPPORT
27 :
28 : /*
29 : * TIFF Library.
30 : * LogLuv compression support for high dynamic range images.
31 : *
32 : * Contributed by Greg Larson.
33 : *
34 : * LogLuv image support uses the TIFF library to store 16 or 10-bit
35 : * log luminance values with 8 bits each of u and v or a 14-bit index.
36 : *
37 : * The codec can take as input and produce as output 32-bit IEEE float values
38 : * as well as 16-bit integer values. A 16-bit luminance is interpreted
39 : * as a sign bit followed by a 15-bit integer that is converted
40 : * to and from a linear magnitude using the transformation:
41 : *
42 : * L = 2^( (Le+.5)/256 - 64 ) # real from 15-bit
43 : *
44 : * Le = floor( 256*(log2(L) + 64) ) # 15-bit from real
45 : *
46 : * The actual conversion to world luminance units in candelas per sq. meter
47 : * requires an additional multiplier, which is stored in the TIFFTAG_STONITS.
48 : * This value is usually set such that a reasonable exposure comes from
49 : * clamping decoded luminances above 1 to 1 in the displayed image.
50 : *
51 : * The 16-bit values for u and v may be converted to real values by dividing
52 : * each by 32768. (This allows for negative values, which aren't useful as
53 : * far as we know, but are left in case of future improvements in human
54 : * color vision.)
55 : *
56 : * Conversion from (u,v), which is actually the CIE (u',v') system for
57 : * you color scientists, is accomplished by the following transformation:
58 : *
59 : * u = 4*x / (-2*x + 12*y + 3)
60 : * v = 9*y / (-2*x + 12*y + 3)
61 : *
62 : * x = 9*u / (6*u - 16*v + 12)
63 : * y = 4*v / (6*u - 16*v + 12)
64 : *
65 : * This process is greatly simplified by passing 32-bit IEEE floats
66 : * for each of three CIE XYZ coordinates. The codec then takes care
67 : * of conversion to and from LogLuv, though the application is still
68 : * responsible for interpreting the TIFFTAG_STONITS calibration factor.
69 : *
70 : * By definition, a CIE XYZ vector of [1 1 1] corresponds to a neutral white
71 : * point of (x,y)=(1/3,1/3). However, most color systems assume some other
72 : * white point, such as D65, and an absolute color conversion to XYZ then
73 : * to another color space with a different white point may introduce an
74 : * unwanted color cast to the image. It is often desirable, therefore, to
75 : * perform a white point conversion that maps the input white to [1 1 1]
76 : * in XYZ, then record the original white point using the TIFFTAG_WHITEPOINT
77 : * tag value. A decoder that demands absolute color calibration may use
78 : * this white point tag to get back the original colors, but usually it
79 : * will be ignored and the new white point will be used instead that
80 : * matches the output color space.
81 : *
82 : * Pixel information is compressed into one of two basic encodings, depending
83 : * on the setting of the compression tag, which is one of COMPRESSION_SGILOG
84 : * or COMPRESSION_SGILOG24. For COMPRESSION_SGILOG, greyscale data is
85 : * stored as:
86 : *
87 : * 1 15
88 : * |-+---------------|
89 : *
90 : * COMPRESSION_SGILOG color data is stored as:
91 : *
92 : * 1 15 8 8
93 : * |-+---------------|--------+--------|
94 : * S Le ue ve
95 : *
96 : * For the 24-bit COMPRESSION_SGILOG24 color format, the data is stored as:
97 : *
98 : * 10 14
99 : * |----------|--------------|
100 : * Le' Ce
101 : *
102 : * There is no sign bit in the 24-bit case, and the (u,v) chromaticity is
103 : * encoded as an index for optimal color resolution. The 10 log bits are
104 : * defined by the following conversions:
105 : *
106 : * L = 2^((Le'+.5)/64 - 12) # real from 10-bit
107 : *
108 : * Le' = floor( 64*(log2(L) + 12) ) # 10-bit from real
109 : *
110 : * The 10 bits of the smaller format may be converted into the 15 bits of
111 : * the larger format by multiplying by 4 and adding 13314. Obviously,
112 : * a smaller range of magnitudes is covered (about 5 orders of magnitude
113 : * instead of 38), and the lack of a sign bit means that negative luminances
114 : * are not allowed. (Well, they aren't allowed in the real world, either,
115 : * but they are useful for certain types of image processing.)
116 : *
117 : * The desired user format is controlled by the setting the internal
118 : * pseudo tag TIFFTAG_SGILOGDATAFMT to one of:
119 : * SGILOGDATAFMT_FLOAT = IEEE 32-bit float XYZ values
120 : * SGILOGDATAFMT_16BIT = 16-bit integer encodings of logL, u and v
121 : * Raw data i/o is also possible using:
122 : * SGILOGDATAFMT_RAW = 32-bit unsigned integer with encoded pixel
123 : * In addition, the following decoding is provided for ease of display:
124 : * SGILOGDATAFMT_8BIT = 8-bit default RGB gamma-corrected values
125 : *
126 : * For grayscale images, we provide the following data formats:
127 : * SGILOGDATAFMT_FLOAT = IEEE 32-bit float Y values
128 : * SGILOGDATAFMT_16BIT = 16-bit integer w/ encoded luminance
129 : * SGILOGDATAFMT_8BIT = 8-bit gray monitor values
130 : *
131 : * Note that the COMPRESSION_SGILOG applies a simple run-length encoding
132 : * scheme by separating the logL, u and v bytes for each row and applying
133 : * a PackBits type of compression. Since the 24-bit encoding is not
134 : * adaptive, the 32-bit color format takes less space in many cases.
135 : *
136 : * Further control is provided over the conversion from higher-resolution
137 : * formats to final encoded values through the pseudo tag
138 : * TIFFTAG_SGILOGENCODE:
139 : * SGILOGENCODE_NODITHER = do not dither encoded values
140 : * SGILOGENCODE_RANDITHER = apply random dithering during encoding
141 : *
142 : * The default value of this tag is SGILOGENCODE_NODITHER for
143 : * COMPRESSION_SGILOG to maximize run-length encoding and
144 : * SGILOGENCODE_RANDITHER for COMPRESSION_SGILOG24 to turn
145 : * quantization errors into noise.
146 : */
147 :
148 : #include <limits.h>
149 : #include <math.h>
150 : #include <stdio.h>
151 : #include <stdlib.h>
152 : #include <time.h>
153 :
154 : /*
155 : * State block for each open TIFF
156 : * file using LogLuv compression/decompression.
157 : */
158 : typedef struct logLuvState LogLuvState;
159 :
160 : struct logLuvState
161 : {
162 : int encoder_state; /* 1 if encoder correctly initialized */
163 : int user_datafmt; /* user data format */
164 : int encode_meth; /* encoding method */
165 : int pixel_size; /* bytes per pixel */
166 :
167 : uint8_t *tbuf; /* translation buffer */
168 : tmsize_t tbuflen; /* buffer length */
169 : void (*tfunc)(LogLuvState *, uint8_t *, tmsize_t);
170 :
171 : TIFFVSetMethod vgetparent; /* super-class method */
172 : TIFFVSetMethod vsetparent; /* super-class method */
173 : };
174 :
175 : #define DecoderState(tif) ((LogLuvState *)(tif)->tif_data)
176 : #define EncoderState(tif) ((LogLuvState *)(tif)->tif_data)
177 :
178 : #define SGILOGDATAFMT_UNKNOWN -1
179 :
180 : #define MINRUN 4 /* minimum run length */
181 :
182 : static void L16toL16(LogLuvState *sp, uint8_t *op, tmsize_t n);
183 : static void L16fromL16(LogLuvState *sp, uint8_t *op, tmsize_t n);
184 : static void LuvRawToRaw(LogLuvState *sp, uint8_t *op, tmsize_t n);
185 : static void LuvRawFromRaw(LogLuvState *sp, uint8_t *op, tmsize_t n);
186 :
187 : /*
188 : * Decode a string of 16-bit gray pixels.
189 : */
190 40 : static int LogL16Decode(TIFF *tif, uint8_t *op, tmsize_t occ, uint16_t s)
191 : {
192 : static const char module[] = "LogL16Decode";
193 40 : LogLuvState *sp = DecoderState(tif);
194 : int shft;
195 : tmsize_t i;
196 : tmsize_t npixels;
197 : unsigned char *bp;
198 : int16_t *tp;
199 : int16_t b;
200 : tmsize_t cc;
201 : int rc;
202 :
203 : (void)s;
204 40 : assert(s == 0);
205 40 : assert(sp != NULL);
206 :
207 40 : npixels = occ / sp->pixel_size;
208 :
209 40 : if (sp->tbuflen < npixels)
210 : {
211 0 : TIFFErrorExtR(tif, module, "Translation buffer too short");
212 0 : return (0);
213 : }
214 40 : tp = (int16_t *)sp->tbuf;
215 40 : _TIFFmemset((void *)tp, 0, (tmsize_t)((size_t)npixels * sizeof(tp[0])));
216 :
217 40 : bp = (unsigned char *)tif->tif_rawcp;
218 40 : cc = tif->tif_rawcc;
219 : /* get each byte string */
220 120 : for (shft = 8; shft >= 0; shft -= 8)
221 : {
222 168 : for (i = 0; i < npixels && cc > 0;)
223 : {
224 88 : if (*bp >= 128)
225 : { /* run */
226 44 : if (cc < 2)
227 0 : break;
228 44 : rc = *bp++ + (2 - 128);
229 44 : b = (int16_t)(*bp++ << shft);
230 44 : cc -= 2;
231 862 : while (rc-- && i < npixels)
232 818 : tp[i++] |= b;
233 : }
234 : else
235 : { /* non-run */
236 44 : rc = *bp++; /* nul is noop */
237 826 : while (--cc && rc-- && i < npixels)
238 782 : tp[i++] |= (int16_t)(*bp++ << shft);
239 : }
240 : }
241 80 : if (i != npixels)
242 : {
243 0 : TIFFErrorExtR(tif, module,
244 : "Not enough data at row %" PRIu32
245 : " (short %" TIFF_SSIZE_FORMAT " pixels)",
246 : tif->tif_dir.td_row, npixels - i);
247 0 : tif->tif_rawcp = (uint8_t *)bp;
248 0 : tif->tif_rawcc = cc;
249 0 : return (0);
250 : }
251 : }
252 40 : if (sp->user_datafmt == SGILOGDATAFMT_16BIT)
253 20 : L16toL16(sp, op, npixels);
254 : else
255 20 : (*sp->tfunc)(sp, op, npixels);
256 40 : tif->tif_rawcp = (uint8_t *)bp;
257 40 : tif->tif_rawcc = cc;
258 40 : return (1);
259 : }
260 :
261 : /*
262 : * Decode a string of 24-bit pixels.
263 : */
264 0 : static int LogLuvDecode24(TIFF *tif, uint8_t *op, tmsize_t occ, uint16_t s)
265 : {
266 : static const char module[] = "LogLuvDecode24";
267 0 : LogLuvState *sp = DecoderState(tif);
268 : tmsize_t cc;
269 : tmsize_t i;
270 : tmsize_t npixels;
271 : unsigned char *bp;
272 : uint32_t *tp;
273 :
274 : (void)s;
275 0 : assert(s == 0);
276 0 : assert(sp != NULL);
277 :
278 0 : npixels = occ / sp->pixel_size;
279 :
280 0 : if (sp->tbuflen < npixels)
281 : {
282 0 : TIFFErrorExtR(tif, module, "Translation buffer too short");
283 0 : return (0);
284 : }
285 0 : tp = (uint32_t *)sp->tbuf;
286 : /* copy to array of uint32_t */
287 0 : bp = (unsigned char *)tif->tif_rawcp;
288 0 : cc = tif->tif_rawcc;
289 0 : for (i = 0; i < npixels && cc >= 3; i++)
290 : {
291 0 : tp[i] = (uint32_t)bp[0] << 16 | (uint32_t)bp[1] << 8 | bp[2];
292 0 : bp += 3;
293 0 : cc -= 3;
294 : }
295 0 : tif->tif_rawcp = (uint8_t *)bp;
296 0 : tif->tif_rawcc = cc;
297 0 : if (i != npixels)
298 : {
299 0 : TIFFErrorExtR(tif, module,
300 : "Not enough data at row %" PRIu32
301 : " (short %" TIFF_SSIZE_FORMAT " pixels)",
302 : tif->tif_dir.td_row, npixels - i);
303 0 : return (0);
304 : }
305 0 : if (sp->user_datafmt == SGILOGDATAFMT_RAW)
306 0 : LuvRawToRaw(sp, op, npixels);
307 : else
308 0 : (*sp->tfunc)(sp, op, npixels);
309 0 : return (1);
310 : }
311 :
312 : /*
313 : * Decode a string of 32-bit pixels.
314 : */
315 0 : static int LogLuvDecode32(TIFF *tif, uint8_t *op, tmsize_t occ, uint16_t s)
316 : {
317 : static const char module[] = "LogLuvDecode32";
318 : LogLuvState *sp;
319 : int shft;
320 : tmsize_t i;
321 : tmsize_t npixels;
322 : unsigned char *bp;
323 : uint32_t *tp;
324 : uint32_t b;
325 : tmsize_t cc;
326 : int rc;
327 :
328 : (void)s;
329 0 : assert(s == 0);
330 0 : sp = DecoderState(tif);
331 0 : assert(sp != NULL);
332 :
333 0 : npixels = occ / sp->pixel_size;
334 :
335 0 : if (sp->tbuflen < npixels)
336 : {
337 0 : TIFFErrorExtR(tif, module, "Translation buffer too short");
338 0 : return (0);
339 : }
340 0 : tp = (uint32_t *)sp->tbuf;
341 0 : _TIFFmemset((void *)tp, 0, (tmsize_t)((size_t)npixels * sizeof(tp[0])));
342 :
343 0 : bp = (unsigned char *)tif->tif_rawcp;
344 0 : cc = tif->tif_rawcc;
345 : /* get each byte string */
346 0 : for (shft = 24; shft >= 0; shft -= 8)
347 : {
348 0 : for (i = 0; i < npixels && cc > 0;)
349 : {
350 0 : if (*bp >= 128)
351 : { /* run */
352 0 : if (cc < 2)
353 0 : break;
354 0 : rc = *bp++ + (2 - 128);
355 0 : b = (uint32_t)*bp++ << shft;
356 0 : cc -= 2;
357 0 : while (rc-- && i < npixels)
358 0 : tp[i++] |= b;
359 : }
360 : else
361 : { /* non-run */
362 0 : rc = *bp++; /* nul is noop */
363 0 : while (--cc && rc-- && i < npixels)
364 0 : tp[i++] |= (uint32_t)*bp++ << shft;
365 : }
366 : }
367 0 : if (i != npixels)
368 : {
369 0 : TIFFErrorExtR(tif, module,
370 : "Not enough data at row %" PRIu32
371 : " (short %" TIFF_SSIZE_FORMAT " pixels)",
372 : tif->tif_dir.td_row, npixels - i);
373 0 : tif->tif_rawcp = (uint8_t *)bp;
374 0 : tif->tif_rawcc = cc;
375 0 : return (0);
376 : }
377 : }
378 0 : if (sp->user_datafmt == SGILOGDATAFMT_RAW)
379 0 : LuvRawToRaw(sp, op, npixels);
380 : else
381 0 : (*sp->tfunc)(sp, op, npixels);
382 0 : tif->tif_rawcp = (uint8_t *)bp;
383 0 : tif->tif_rawcc = cc;
384 0 : return (1);
385 : }
386 :
387 : /*
388 : * Decode a strip of pixels. We break it into rows to
389 : * maintain synchrony with the encode algorithm, which
390 : * is row by row.
391 : */
392 2 : static int LogLuvDecodeStrip(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s)
393 : {
394 2 : tmsize_t rowlen = TIFFScanlineSize(tif);
395 :
396 2 : if (rowlen == 0)
397 0 : return 0;
398 :
399 2 : assert(cc % rowlen == 0);
400 42 : while (cc && (*tif->tif_decoderow)(tif, bp, rowlen, s))
401 : {
402 40 : bp += rowlen;
403 40 : cc -= rowlen;
404 : }
405 2 : return (cc == 0);
406 : }
407 :
408 : /*
409 : * Decode a tile of pixels. We break it into rows to
410 : * maintain synchrony with the encode algorithm, which
411 : * is row by row.
412 : */
413 0 : static int LogLuvDecodeTile(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s)
414 : {
415 0 : tmsize_t rowlen = TIFFTileRowSize(tif);
416 :
417 0 : if (rowlen == 0)
418 0 : return 0;
419 :
420 0 : assert(cc % rowlen == 0);
421 0 : while (cc && (*tif->tif_decoderow)(tif, bp, rowlen, s))
422 : {
423 0 : bp += rowlen;
424 0 : cc -= rowlen;
425 : }
426 0 : return (cc == 0);
427 : }
428 :
429 : /*
430 : * Encode a row of 16-bit pixels.
431 : */
432 0 : static int LogL16Encode(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s)
433 : {
434 : static const char module[] = "LogL16Encode";
435 0 : LogLuvState *sp = EncoderState(tif);
436 : int shft;
437 : tmsize_t i;
438 : tmsize_t j;
439 : tmsize_t npixels;
440 : uint8_t *op;
441 : int16_t *tp;
442 : int16_t b;
443 : tmsize_t occ;
444 0 : int rc = 0, mask;
445 : tmsize_t beg;
446 :
447 : (void)s;
448 0 : assert(s == 0);
449 0 : assert(sp != NULL);
450 0 : npixels = cc / sp->pixel_size;
451 :
452 0 : tp = (int16_t *)sp->tbuf;
453 0 : if (sp->tbuflen < npixels)
454 : {
455 0 : TIFFErrorExtR(tif, module, "Translation buffer too short");
456 0 : return (0);
457 : }
458 0 : if (sp->user_datafmt == SGILOGDATAFMT_16BIT)
459 0 : L16fromL16(sp, bp, npixels);
460 : else
461 0 : (*sp->tfunc)(sp, bp, npixels);
462 : /* compress each byte string */
463 0 : op = tif->tif_rawcp;
464 0 : occ = tif->tif_rawdatasize - tif->tif_rawcc;
465 0 : for (shft = 8; shft >= 0; shft -= 8)
466 : {
467 0 : for (i = 0; i < npixels; i += rc)
468 : {
469 0 : if (occ < 4)
470 : {
471 0 : tif->tif_rawcp = op;
472 0 : tif->tif_rawcc = tif->tif_rawdatasize - occ;
473 0 : if (!TIFFFlushData1(tif))
474 0 : return (0);
475 0 : op = tif->tif_rawcp;
476 0 : occ = tif->tif_rawdatasize - tif->tif_rawcc;
477 : }
478 0 : mask = 0xff << shft; /* find next run */
479 0 : for (beg = i; beg < npixels; beg += rc)
480 : {
481 0 : b = (int16_t)(tp[beg] & mask);
482 0 : rc = 1;
483 0 : while (rc < 127 + 2 && beg + rc < npixels &&
484 0 : (tp[beg + rc] & mask) == b)
485 0 : rc++;
486 0 : if (rc >= MINRUN)
487 0 : break; /* long enough */
488 : }
489 0 : if (beg - i > 1 && beg - i < MINRUN)
490 : {
491 0 : b = (int16_t)(tp[i] & mask); /*check short run */
492 0 : j = i + 1;
493 0 : while ((tp[j++] & mask) == b)
494 0 : if (j == beg)
495 : {
496 0 : *op++ = (uint8_t)(128 - 2 + j - i);
497 0 : *op++ = (uint8_t)(b >> shft);
498 0 : occ -= 2;
499 0 : i = beg;
500 0 : break;
501 : }
502 : }
503 0 : while (i < beg)
504 : { /* write out non-run */
505 0 : if ((j = beg - i) > 127)
506 0 : j = 127;
507 0 : if (occ < j + 3)
508 : {
509 0 : tif->tif_rawcp = op;
510 0 : tif->tif_rawcc = tif->tif_rawdatasize - occ;
511 0 : if (!TIFFFlushData1(tif))
512 0 : return (0);
513 0 : op = tif->tif_rawcp;
514 0 : occ = tif->tif_rawdatasize - tif->tif_rawcc;
515 : }
516 0 : *op++ = (uint8_t)j;
517 0 : occ--;
518 0 : while (j--)
519 : {
520 0 : *op++ = (uint8_t)(tp[i++] >> shft & 0xff);
521 0 : occ--;
522 : }
523 : }
524 0 : if (rc >= MINRUN)
525 : { /* write out run */
526 0 : *op++ = (uint8_t)(128 - 2 + rc);
527 0 : *op++ = (uint8_t)(tp[beg] >> shft & 0xff);
528 0 : occ -= 2;
529 : }
530 : else
531 0 : rc = 0;
532 : }
533 : }
534 0 : tif->tif_rawcp = op;
535 0 : tif->tif_rawcc = tif->tif_rawdatasize - occ;
536 :
537 0 : return (1);
538 : }
539 :
540 : /*
541 : * Encode a row of 24-bit pixels.
542 : */
543 0 : static int LogLuvEncode24(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s)
544 : {
545 : static const char module[] = "LogLuvEncode24";
546 0 : LogLuvState *sp = EncoderState(tif);
547 : tmsize_t i;
548 : tmsize_t npixels;
549 : tmsize_t occ;
550 : uint8_t *op;
551 : uint32_t *tp;
552 :
553 : (void)s;
554 0 : assert(s == 0);
555 0 : assert(sp != NULL);
556 0 : npixels = cc / sp->pixel_size;
557 :
558 0 : tp = (uint32_t *)sp->tbuf;
559 0 : if (sp->tbuflen < npixels)
560 : {
561 0 : TIFFErrorExtR(tif, module, "Translation buffer too short");
562 0 : return (0);
563 : }
564 0 : if (sp->user_datafmt == SGILOGDATAFMT_RAW)
565 0 : LuvRawFromRaw(sp, bp, npixels);
566 : else
567 0 : (*sp->tfunc)(sp, bp, npixels);
568 : /* write out encoded pixels */
569 0 : op = tif->tif_rawcp;
570 0 : occ = tif->tif_rawdatasize - tif->tif_rawcc;
571 0 : for (i = npixels; i--;)
572 : {
573 0 : if (occ < 3)
574 : {
575 0 : tif->tif_rawcp = op;
576 0 : tif->tif_rawcc = tif->tif_rawdatasize - occ;
577 0 : if (!TIFFFlushData1(tif))
578 0 : return (0);
579 0 : op = tif->tif_rawcp;
580 0 : occ = tif->tif_rawdatasize - tif->tif_rawcc;
581 : }
582 0 : *op++ = (uint8_t)(*tp >> 16);
583 0 : *op++ = (uint8_t)(*tp >> 8 & 0xff);
584 0 : *op++ = (uint8_t)(*tp++ & 0xff);
585 0 : occ -= 3;
586 : }
587 0 : tif->tif_rawcp = op;
588 0 : tif->tif_rawcc = tif->tif_rawdatasize - occ;
589 :
590 0 : return (1);
591 : }
592 :
593 : /*
594 : * Encode a row of 32-bit pixels.
595 : */
596 0 : static int LogLuvEncode32(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s)
597 : {
598 : static const char module[] = "LogLuvEncode32";
599 0 : LogLuvState *sp = EncoderState(tif);
600 : int shft;
601 : tmsize_t i;
602 : tmsize_t j;
603 : tmsize_t npixels;
604 : uint8_t *op;
605 : uint32_t *tp;
606 : uint32_t b;
607 : tmsize_t occ;
608 0 : int rc = 0;
609 : tmsize_t beg;
610 :
611 : (void)s;
612 0 : assert(s == 0);
613 0 : assert(sp != NULL);
614 :
615 0 : npixels = cc / sp->pixel_size;
616 :
617 0 : tp = (uint32_t *)sp->tbuf;
618 0 : if (sp->tbuflen < npixels)
619 : {
620 0 : TIFFErrorExtR(tif, module, "Translation buffer too short");
621 0 : return (0);
622 : }
623 0 : if (sp->user_datafmt == SGILOGDATAFMT_RAW)
624 0 : LuvRawFromRaw(sp, bp, npixels);
625 : else
626 0 : (*sp->tfunc)(sp, bp, npixels);
627 : /* compress each byte string */
628 0 : op = tif->tif_rawcp;
629 0 : occ = tif->tif_rawdatasize - tif->tif_rawcc;
630 0 : for (shft = 24; shft >= 0; shft -= 8)
631 : {
632 0 : const uint32_t mask = 0xffU << shft; /* find next run */
633 0 : for (i = 0; i < npixels; i += rc)
634 : {
635 0 : if (occ < 4)
636 : {
637 0 : tif->tif_rawcp = op;
638 0 : tif->tif_rawcc = tif->tif_rawdatasize - occ;
639 0 : if (!TIFFFlushData1(tif))
640 0 : return (0);
641 0 : op = tif->tif_rawcp;
642 0 : occ = tif->tif_rawdatasize - tif->tif_rawcc;
643 : }
644 0 : for (beg = i; beg < npixels; beg += rc)
645 : {
646 0 : b = tp[beg] & mask;
647 0 : rc = 1;
648 0 : while (rc < 127 + 2 && beg + rc < npixels &&
649 0 : (tp[beg + rc] & mask) == b)
650 0 : rc++;
651 0 : if (rc >= MINRUN)
652 0 : break; /* long enough */
653 : }
654 0 : if (beg - i > 1 && beg - i < MINRUN)
655 : {
656 0 : b = tp[i] & mask; /* check short run */
657 0 : j = i + 1;
658 0 : while ((tp[j++] & mask) == b)
659 0 : if (j == beg)
660 : {
661 0 : *op++ = (uint8_t)(128 - 2 + j - i);
662 0 : *op++ = (uint8_t)(b >> shft);
663 0 : occ -= 2;
664 0 : i = beg;
665 0 : break;
666 : }
667 : }
668 0 : while (i < beg)
669 : { /* write out non-run */
670 0 : if ((j = beg - i) > 127)
671 0 : j = 127;
672 0 : if (occ < j + 3)
673 : {
674 0 : tif->tif_rawcp = op;
675 0 : tif->tif_rawcc = tif->tif_rawdatasize - occ;
676 0 : if (!TIFFFlushData1(tif))
677 0 : return (0);
678 0 : op = tif->tif_rawcp;
679 0 : occ = tif->tif_rawdatasize - tif->tif_rawcc;
680 : }
681 0 : *op++ = (uint8_t)j;
682 0 : occ--;
683 0 : while (j--)
684 : {
685 0 : *op++ = (uint8_t)(tp[i++] >> shft & 0xff);
686 0 : occ--;
687 : }
688 : }
689 0 : if (rc >= MINRUN)
690 : { /* write out run */
691 0 : *op++ = (uint8_t)(128 - 2 + rc);
692 0 : *op++ = (uint8_t)(tp[beg] >> shft & 0xff);
693 0 : occ -= 2;
694 : }
695 : else
696 0 : rc = 0;
697 : }
698 : }
699 0 : tif->tif_rawcp = op;
700 0 : tif->tif_rawcc = tif->tif_rawdatasize - occ;
701 :
702 0 : return (1);
703 : }
704 :
705 : /*
706 : * Encode a strip of pixels. We break it into rows to
707 : * avoid encoding runs across row boundaries.
708 : */
709 0 : static int LogLuvEncodeStrip(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s)
710 : {
711 0 : tmsize_t rowlen = TIFFScanlineSize(tif);
712 :
713 0 : if (rowlen == 0)
714 0 : return 0;
715 :
716 0 : assert(cc % rowlen == 0);
717 0 : while (cc && (*tif->tif_encoderow)(tif, bp, rowlen, s) == 1)
718 : {
719 0 : bp += rowlen;
720 0 : cc -= rowlen;
721 : }
722 0 : return (cc == 0);
723 : }
724 :
725 : /*
726 : * Encode a tile of pixels. We break it into rows to
727 : * avoid encoding runs across row boundaries.
728 : */
729 0 : static int LogLuvEncodeTile(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s)
730 : {
731 0 : tmsize_t rowlen = TIFFTileRowSize(tif);
732 :
733 0 : if (rowlen == 0)
734 0 : return 0;
735 :
736 0 : assert(cc % rowlen == 0);
737 0 : while (cc && (*tif->tif_encoderow)(tif, bp, rowlen, s) == 1)
738 : {
739 0 : bp += rowlen;
740 0 : cc -= rowlen;
741 : }
742 0 : return (cc == 0);
743 : }
744 :
745 : /*
746 : * Encode/Decode functions for converting to and from user formats.
747 : */
748 :
749 : #include "uvcode.h"
750 :
751 : #ifndef UVSCALE
752 : #define U_NEU 0.210526316
753 : #define V_NEU 0.473684211
754 : #define UVSCALE 410.
755 : #endif
756 :
757 : #ifndef M_LN2
758 : #define M_LN2 0.69314718055994530942
759 : #endif
760 : #ifndef M_PI
761 : #define M_PI 3.14159265358979323846
762 : #endif
763 :
764 : #define TIFF_RAND_MAX 32767
765 :
766 : // From POSIX.1-2001 as an example of an implementation of rand()
767 0 : static uint32_t _TIFFRand(void)
768 : {
769 : static uint32_t nCounter = 0;
770 0 : if (!nCounter)
771 0 : nCounter = (uint32_t)(time(NULL) & UINT32_MAX);
772 0 : ++nCounter;
773 0 : uint32_t nCounterLocal =
774 0 : (uint32_t)(((uint64_t)(nCounter) * 1103515245U + 12345U) & UINT32_MAX);
775 0 : nCounter = nCounterLocal;
776 0 : return (nCounterLocal / 65536U) % (TIFF_RAND_MAX + 1);
777 : }
778 :
779 0 : static int tiff_itrunc(double x, int m)
780 : {
781 0 : if (m == SGILOGENCODE_NODITHER)
782 0 : return (int)x;
783 0 : return (int)(x + _TIFFRand() * (1. / TIFF_RAND_MAX) - .5);
784 : }
785 :
786 : #if !LOGLUV_PUBLIC
787 : static
788 : #endif
789 400 : double LogL16toY(int p16) /* compute luminance from 16-bit LogL */
790 : {
791 400 : int Le = p16 & 0x7fff;
792 : double Y;
793 :
794 400 : if (!Le)
795 0 : return (0.);
796 400 : Y = exp(M_LN2 / 256. * (Le + .5) - M_LN2 * 64.);
797 400 : return (!(p16 & 0x8000) ? Y : -Y);
798 : }
799 :
800 : #if !LOGLUV_PUBLIC
801 : static
802 : #endif
803 0 : int LogL16fromY(double Y, int em) /* get 16-bit LogL from Y */
804 : {
805 0 : if (Y >= 1.8371976e19)
806 0 : return (0x7fff);
807 0 : if (Y <= -1.8371976e19)
808 0 : return (0xffff);
809 0 : if (Y > 5.4136769e-20)
810 0 : return tiff_itrunc(256. * (log2(Y) + 64.), em);
811 0 : if (Y < -5.4136769e-20)
812 0 : return (~0x7fff | tiff_itrunc(256. * (log2(-Y) + 64.), em));
813 0 : return (0);
814 : }
815 :
816 : /*
817 : * SGILOGDATAFMT_* buffers are application-facing user data buffers in native
818 : * byte order. The helpers below do not perform TIFF file byte-order
819 : * conversion; they only avoid unaligned typed access to public byte buffers.
820 : * Use fixed-size memcpy() calls directly so optimizing compilers can expand
821 : * them in these per-pixel paths. _TIFFmemcpy() is an out-of-line wrapper in
822 : * non-LTO builds.
823 : */
824 0 : static float LogLuvLoadFloatNativeUnaligned(const uint8_t *cp)
825 : {
826 : float v;
827 0 : memcpy(&v, cp, sizeof(v));
828 0 : return v;
829 : }
830 :
831 0 : static void LogLuvStoreFloatNativeUnaligned(uint8_t *cp, float v)
832 : {
833 0 : memcpy(cp, &v, sizeof(v));
834 0 : }
835 :
836 0 : static int16_t LogLuvLoad16NativeUnaligned(const uint8_t *cp)
837 : {
838 : int16_t v;
839 0 : memcpy(&v, cp, sizeof(v));
840 0 : return v;
841 : }
842 :
843 400 : static void LogLuvStore16NativeUnaligned(uint8_t *cp, int16_t v)
844 : {
845 400 : memcpy(cp, &v, sizeof(v));
846 400 : }
847 :
848 0 : static uint32_t LogLuvLoad32NativeUnaligned(const uint8_t *cp)
849 : {
850 : uint32_t v;
851 0 : memcpy(&v, cp, sizeof(v));
852 0 : return v;
853 : }
854 :
855 0 : static void LogLuvStore32NativeUnaligned(uint8_t *cp, uint32_t v)
856 : {
857 0 : memcpy(cp, &v, sizeof(v));
858 0 : }
859 :
860 20 : static void L16toL16(LogLuvState *sp, uint8_t *op, tmsize_t n)
861 : {
862 20 : int16_t *l16 = (int16_t *)sp->tbuf;
863 :
864 420 : while (n-- > 0)
865 : {
866 400 : LogLuvStore16NativeUnaligned(op, *l16++);
867 400 : op += sizeof(int16_t);
868 : }
869 20 : }
870 :
871 0 : static void L16fromL16(LogLuvState *sp, uint8_t *op, tmsize_t n)
872 : {
873 0 : int16_t *l16 = (int16_t *)sp->tbuf;
874 :
875 0 : while (n-- > 0)
876 : {
877 0 : *l16++ = LogLuvLoad16NativeUnaligned(op);
878 0 : op += sizeof(int16_t);
879 : }
880 0 : }
881 :
882 0 : static void LuvRawToRaw(LogLuvState *sp, uint8_t *op, tmsize_t n)
883 : {
884 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
885 :
886 0 : while (n-- > 0)
887 : {
888 0 : LogLuvStore32NativeUnaligned(op, *luv++);
889 0 : op += sizeof(uint32_t);
890 : }
891 0 : }
892 :
893 0 : static void LuvRawFromRaw(LogLuvState *sp, uint8_t *op, tmsize_t n)
894 : {
895 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
896 :
897 0 : while (n-- > 0)
898 : {
899 0 : *luv++ = LogLuvLoad32NativeUnaligned(op);
900 0 : op += sizeof(uint32_t);
901 : }
902 0 : }
903 :
904 0 : static void L16toY(LogLuvState *sp, uint8_t *op, tmsize_t n)
905 : {
906 0 : int16_t *l16 = (int16_t *)sp->tbuf;
907 :
908 0 : while (n-- > 0)
909 : {
910 0 : LogLuvStoreFloatNativeUnaligned(op, (float)LogL16toY(*l16++));
911 0 : op += sizeof(float);
912 : }
913 0 : }
914 :
915 20 : static void L16toGry(LogLuvState *sp, uint8_t *op, tmsize_t n)
916 : {
917 20 : int16_t *l16 = (int16_t *)sp->tbuf;
918 20 : uint8_t *gp = (uint8_t *)op;
919 :
920 420 : while (n-- > 0)
921 : {
922 400 : double Y = LogL16toY(*l16++);
923 800 : *gp++ = (uint8_t)((Y <= 0.) ? 0
924 : : (Y >= 1.) ? 255
925 400 : : (int)(256. * sqrt(Y)));
926 : }
927 20 : }
928 :
929 0 : static void L16fromY(LogLuvState *sp, uint8_t *op, tmsize_t n)
930 : {
931 0 : int16_t *l16 = (int16_t *)sp->tbuf;
932 :
933 0 : while (n-- > 0)
934 : {
935 0 : *l16++ = (int16_t)(LogL16fromY(
936 0 : (double)LogLuvLoadFloatNativeUnaligned(op), sp->encode_meth));
937 0 : op += sizeof(float);
938 : }
939 0 : }
940 :
941 : #if !LOGLUV_PUBLIC
942 : static
943 : #endif
944 0 : void XYZtoRGB24(float *xyz, uint8_t *rgb)
945 : {
946 : double r, g, b;
947 : /* assume CCIR-709 primaries */
948 0 : r = 2.690 * (double)xyz[0] + -1.276 * (double)xyz[1] +
949 0 : -0.414 * (double)xyz[2];
950 0 : g = -1.022 * (double)xyz[0] + 1.978 * (double)xyz[1] +
951 0 : 0.044 * (double)xyz[2];
952 0 : b = 0.061 * (double)xyz[0] + -0.224 * (double)xyz[1] +
953 0 : 1.163 * (double)xyz[2];
954 : /* assume 2.0 gamma for speed */
955 : /* could use integer sqrt approx., but this is probably faster */
956 0 : rgb[0] = (uint8_t)((r <= 0.) ? 0 : (r >= 1.) ? 255 : (int)(256. * sqrt(r)));
957 0 : rgb[1] = (uint8_t)((g <= 0.) ? 0 : (g >= 1.) ? 255 : (int)(256. * sqrt(g)));
958 0 : rgb[2] = (uint8_t)((b <= 0.) ? 0 : (b >= 1.) ? 255 : (int)(256. * sqrt(b)));
959 0 : }
960 :
961 : #if !LOGLUV_PUBLIC
962 : static
963 : #endif
964 0 : double LogL10toY(int p10) /* compute luminance from 10-bit LogL */
965 : {
966 0 : if (p10 == 0)
967 0 : return (0.);
968 0 : return (exp(M_LN2 / 64. * (p10 + .5) - M_LN2 * 12.));
969 : }
970 :
971 : #if !LOGLUV_PUBLIC
972 : static
973 : #endif
974 0 : int LogL10fromY(double Y, int em) /* get 10-bit LogL from Y */
975 : {
976 0 : if (Y >= 15.742)
977 0 : return (0x3ff);
978 0 : else if (Y <= .00024283)
979 0 : return (0);
980 : else
981 0 : return tiff_itrunc(64. * (log2(Y) + 12.), em);
982 : }
983 :
984 : #define NANGLES 100
985 : #define uv2ang(u, v) \
986 : ((NANGLES * .499999999 / M_PI) * atan2((v) - V_NEU, (u) - U_NEU) + \
987 : .5 * NANGLES)
988 :
989 0 : static int oog_encode(double u, double v) /* encode out-of-gamut chroma */
990 : {
991 : static int oog_table[NANGLES];
992 : static int initialized = 0;
993 : int i;
994 :
995 0 : if (!initialized)
996 : { /* set up perimeter table */
997 : double eps[NANGLES], ua, va, ang, epsa;
998 : int ui, vi, ustep;
999 0 : for (i = NANGLES; i--;)
1000 0 : eps[i] = 2.;
1001 0 : for (vi = UV_NVS; vi--;)
1002 : {
1003 0 : va = (double)UV_VSTART + ((double)vi + .5) * (double)UV_SQSIZ;
1004 0 : ustep = uv_row[vi].nus - 1;
1005 0 : if (vi == UV_NVS - 1 || vi == 0 || ustep <= 0)
1006 0 : ustep = 1;
1007 0 : for (ui = uv_row[vi].nus - 1; ui >= 0; ui -= ustep)
1008 : {
1009 0 : ua = (double)uv_row[vi].ustart +
1010 0 : ((double)ui + .5) * (double)UV_SQSIZ;
1011 0 : ang = uv2ang(ua, va);
1012 0 : i = (int)ang;
1013 0 : epsa = fabs(ang - (i + .5));
1014 0 : if (epsa < eps[i])
1015 : {
1016 0 : oog_table[i] = uv_row[vi].ncum + ui;
1017 0 : eps[i] = epsa;
1018 : }
1019 : }
1020 : }
1021 0 : for (i = NANGLES; i--;) /* fill any holes */
1022 0 : if (eps[i] > 1.5)
1023 : {
1024 : int i1, i2;
1025 0 : for (i1 = 1; i1 < NANGLES / 2; i1++)
1026 0 : if (eps[(i + i1) % NANGLES] < 1.5)
1027 0 : break;
1028 0 : for (i2 = 1; i2 < NANGLES / 2; i2++)
1029 0 : if (eps[(i + NANGLES - i2) % NANGLES] < 1.5)
1030 0 : break;
1031 0 : if (i1 < i2)
1032 0 : oog_table[i] = oog_table[(i + i1) % NANGLES];
1033 : else
1034 0 : oog_table[i] = oog_table[(i + NANGLES - i2) % NANGLES];
1035 : }
1036 0 : initialized = 1;
1037 : }
1038 0 : i = (int)uv2ang(u, v); /* look up hue angle */
1039 0 : return (oog_table[i]);
1040 : }
1041 :
1042 : #undef uv2ang
1043 : #undef NANGLES
1044 :
1045 : #if !LOGLUV_PUBLIC
1046 : static
1047 : #endif
1048 0 : int uv_encode(double u, double v, int em) /* encode (u',v') coordinates */
1049 : {
1050 : unsigned int vi;
1051 : int ui;
1052 :
1053 : /* check for NaN */
1054 0 : if (isnan(u) || isnan(v))
1055 : {
1056 0 : u = U_NEU;
1057 0 : v = V_NEU;
1058 : }
1059 :
1060 0 : if ((double)v < (double)UV_VSTART)
1061 0 : return oog_encode(u, v);
1062 0 : vi = (unsigned int)tiff_itrunc(
1063 0 : ((double)v - (double)UV_VSTART) * (1. / (double)UV_SQSIZ), em);
1064 0 : if (vi >= UV_NVS)
1065 0 : return oog_encode(u, v);
1066 0 : if ((double)u < (double)uv_row[vi].ustart)
1067 0 : return oog_encode(u, v);
1068 0 : ui = tiff_itrunc(
1069 0 : ((double)u - (double)uv_row[vi].ustart) * (1. / (double)UV_SQSIZ), em);
1070 0 : if (ui >= uv_row[vi].nus)
1071 0 : return oog_encode(u, v);
1072 :
1073 0 : return (uv_row[vi].ncum + ui);
1074 : }
1075 :
1076 : #if !LOGLUV_PUBLIC
1077 : static
1078 : #endif
1079 0 : int uv_decode(double *up, double *vp, int c) /* decode (u',v') index */
1080 : {
1081 : unsigned int upper, lower;
1082 : int ui;
1083 : unsigned int vi;
1084 :
1085 0 : if (c < 0 || c >= UV_NDIVS)
1086 0 : return (-1);
1087 0 : lower = 0; /* binary search */
1088 0 : upper = UV_NVS;
1089 0 : while (upper - lower > 1)
1090 : {
1091 0 : vi = (lower + upper) >> 1;
1092 0 : ui = c - uv_row[vi].ncum;
1093 0 : if (ui > 0)
1094 0 : lower = vi;
1095 0 : else if (ui < 0)
1096 0 : upper = vi;
1097 : else
1098 : {
1099 0 : lower = vi;
1100 0 : break;
1101 : }
1102 : }
1103 0 : vi = lower;
1104 0 : ui = c - uv_row[vi].ncum;
1105 0 : *up = (double)uv_row[vi].ustart + ((double)ui + .5) * (double)UV_SQSIZ;
1106 0 : *vp = (double)UV_VSTART + ((double)vi + .5) * (double)UV_SQSIZ;
1107 0 : return (0);
1108 : }
1109 :
1110 : #if !LOGLUV_PUBLIC
1111 : static
1112 : #endif
1113 0 : void LogLuv24toXYZ(uint32_t p, float *XYZ)
1114 : {
1115 : int Ce;
1116 : double L, u, v, s, x, y;
1117 : /* decode luminance */
1118 0 : L = LogL10toY(p >> 14 & 0x3ff);
1119 0 : if (L <= 0.)
1120 : {
1121 0 : XYZ[0] = XYZ[1] = XYZ[2] = 0.;
1122 0 : return;
1123 : }
1124 : /* decode color */
1125 0 : Ce = p & 0x3fff;
1126 0 : if (uv_decode(&u, &v, Ce) < 0)
1127 : {
1128 0 : u = U_NEU;
1129 0 : v = V_NEU;
1130 : }
1131 0 : s = 1. / (6. * u - 16. * v + 12.);
1132 0 : x = 9. * u * s;
1133 0 : y = 4. * v * s;
1134 : /* convert to XYZ */
1135 0 : XYZ[0] = (float)(x / y * L);
1136 0 : XYZ[1] = (float)L;
1137 0 : XYZ[2] = (float)((1. - x - y) / y * L);
1138 : }
1139 :
1140 : #if !LOGLUV_PUBLIC
1141 : static
1142 : #endif
1143 0 : uint32_t LogLuv24fromXYZ(float *XYZ, int em)
1144 : {
1145 : int Le, Ce;
1146 : double u, v, s;
1147 : /* encode luminance */
1148 0 : Le = LogL10fromY((double)XYZ[1], em);
1149 : /* encode color */
1150 0 : s = (double)XYZ[0] + 15. * (double)XYZ[1] + 3. * (double)XYZ[2];
1151 0 : if (!Le || s <= 0.)
1152 : {
1153 0 : u = U_NEU;
1154 0 : v = V_NEU;
1155 : }
1156 : else
1157 : {
1158 0 : u = 4. * (double)XYZ[0] / s;
1159 0 : v = 9. * (double)XYZ[1] / s;
1160 : }
1161 0 : Ce = uv_encode(u, v, em);
1162 0 : if (Ce < 0) /* never happens */
1163 0 : Ce = uv_encode(U_NEU, V_NEU, SGILOGENCODE_NODITHER);
1164 : /* combine encodings */
1165 0 : return (uint32_t)Le << 14 | (uint32_t)Ce;
1166 : }
1167 :
1168 0 : static void Luv24toXYZ(LogLuvState *sp, uint8_t *op, tmsize_t n)
1169 : {
1170 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
1171 :
1172 0 : while (n-- > 0)
1173 : {
1174 : float xyz[3];
1175 0 : LogLuv24toXYZ(*luv, xyz);
1176 0 : LogLuvStoreFloatNativeUnaligned(op, xyz[0]);
1177 0 : LogLuvStoreFloatNativeUnaligned(op + sizeof(float), xyz[1]);
1178 0 : LogLuvStoreFloatNativeUnaligned(op + 2 * sizeof(float), xyz[2]);
1179 0 : op += 3 * sizeof(float);
1180 0 : luv++;
1181 : }
1182 0 : }
1183 :
1184 0 : static void Luv24toLuv48(LogLuvState *sp, uint8_t *op, tmsize_t n)
1185 : {
1186 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
1187 :
1188 0 : while (n-- > 0)
1189 : {
1190 : double u, v;
1191 : int16_t luv0;
1192 : int16_t luv1;
1193 : int16_t luv2;
1194 :
1195 0 : luv0 = (int16_t)((*luv >> 12 & 0xffd) + 13314);
1196 0 : if (uv_decode(&u, &v, *luv & 0x3fff) < 0)
1197 : {
1198 0 : u = U_NEU;
1199 0 : v = V_NEU;
1200 : }
1201 0 : luv1 = (int16_t)(u * (1 << 15));
1202 0 : luv2 = (int16_t)(v * (1 << 15));
1203 0 : LogLuvStore16NativeUnaligned(op, luv0);
1204 0 : LogLuvStore16NativeUnaligned(op + sizeof(int16_t), luv1);
1205 0 : LogLuvStore16NativeUnaligned(op + 2 * sizeof(int16_t), luv2);
1206 0 : op += 3 * sizeof(int16_t);
1207 0 : luv++;
1208 : }
1209 0 : }
1210 :
1211 0 : static void Luv24toRGB(LogLuvState *sp, uint8_t *op, tmsize_t n)
1212 : {
1213 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
1214 0 : uint8_t *rgb = (uint8_t *)op;
1215 :
1216 0 : while (n-- > 0)
1217 : {
1218 : float xyz[3];
1219 :
1220 0 : LogLuv24toXYZ(*luv++, xyz);
1221 0 : XYZtoRGB24(xyz, rgb);
1222 0 : rgb += 3;
1223 : }
1224 0 : }
1225 :
1226 0 : static void Luv24fromXYZ(LogLuvState *sp, uint8_t *op, tmsize_t n)
1227 : {
1228 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
1229 :
1230 0 : while (n-- > 0)
1231 : {
1232 : float xyz[3];
1233 0 : xyz[0] = LogLuvLoadFloatNativeUnaligned(op);
1234 0 : xyz[1] = LogLuvLoadFloatNativeUnaligned(op + sizeof(float));
1235 0 : xyz[2] = LogLuvLoadFloatNativeUnaligned(op + 2 * sizeof(float));
1236 0 : *luv++ = LogLuv24fromXYZ(xyz, sp->encode_meth);
1237 0 : op += 3 * sizeof(float);
1238 : }
1239 0 : }
1240 :
1241 0 : static void Luv24fromLuv48(LogLuvState *sp, uint8_t *op, tmsize_t n)
1242 : {
1243 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
1244 :
1245 0 : while (n-- > 0)
1246 : {
1247 : int Le, Ce;
1248 0 : int16_t luv0 = LogLuvLoad16NativeUnaligned(op);
1249 0 : int16_t luv1 = LogLuvLoad16NativeUnaligned(op + sizeof(int16_t));
1250 0 : int16_t luv2 = LogLuvLoad16NativeUnaligned(op + 2 * sizeof(int16_t));
1251 :
1252 0 : if (luv0 <= 0)
1253 0 : Le = 0;
1254 0 : else if (luv0 >= (1 << 12) + 3314)
1255 0 : Le = (1 << 10) - 1;
1256 0 : else if (sp->encode_meth == SGILOGENCODE_NODITHER)
1257 0 : Le = (luv0 - 3314) >> 2;
1258 : else
1259 0 : Le = tiff_itrunc(.25 * (luv0 - 3314.), sp->encode_meth);
1260 :
1261 0 : Ce = uv_encode((luv1 + .5) / (1 << 15), (luv2 + .5) / (1 << 15),
1262 : sp->encode_meth);
1263 0 : if (Ce < 0) /* never happens */
1264 0 : Ce = uv_encode(U_NEU, V_NEU, SGILOGENCODE_NODITHER);
1265 0 : *luv++ = (uint32_t)Le << 14 | (uint32_t)Ce;
1266 0 : op += 3 * sizeof(int16_t);
1267 : }
1268 0 : }
1269 :
1270 : #if !LOGLUV_PUBLIC
1271 : static
1272 : #endif
1273 0 : void LogLuv32toXYZ(uint32_t p, float *XYZ)
1274 : {
1275 : double L, u, v, s, x, y;
1276 : /* decode luminance */
1277 0 : L = LogL16toY((int)p >> 16);
1278 0 : if (L <= 0.)
1279 : {
1280 0 : XYZ[0] = XYZ[1] = XYZ[2] = 0.;
1281 0 : return;
1282 : }
1283 : /* decode color */
1284 0 : u = 1. / UVSCALE * ((p >> 8 & 0xff) + .5);
1285 0 : v = 1. / UVSCALE * ((p & 0xff) + .5);
1286 0 : s = 1. / (6. * u - 16. * v + 12.);
1287 0 : x = 9. * u * s;
1288 0 : y = 4. * v * s;
1289 : /* convert to XYZ */
1290 0 : XYZ[0] = (float)(x / y * L);
1291 0 : XYZ[1] = (float)L;
1292 0 : XYZ[2] = (float)((1. - x - y) / y * L);
1293 : }
1294 :
1295 : #if !LOGLUV_PUBLIC
1296 : static
1297 : #endif
1298 0 : uint32_t LogLuv32fromXYZ(float *XYZ, int em)
1299 : {
1300 : unsigned int Le, ue, ve;
1301 : double u, v, s;
1302 : /* encode luminance */
1303 0 : Le = (unsigned int)LogL16fromY((double)XYZ[1], em);
1304 : /* encode color */
1305 0 : s = (double)XYZ[0] + 15. * (double)XYZ[1] + 3. * (double)XYZ[2];
1306 0 : if (!Le || s <= 0.)
1307 : {
1308 0 : u = U_NEU;
1309 0 : v = V_NEU;
1310 : }
1311 : else
1312 : {
1313 0 : u = 4. * (double)XYZ[0] / s;
1314 0 : v = 9. * (double)XYZ[1] / s;
1315 : }
1316 0 : if (u <= 0.)
1317 0 : ue = 0;
1318 : else
1319 0 : ue = (unsigned int)tiff_itrunc(UVSCALE * u, em);
1320 0 : if (ue > 255)
1321 0 : ue = 255;
1322 0 : if (v <= 0.)
1323 0 : ve = 0;
1324 : else
1325 0 : ve = (unsigned int)tiff_itrunc(UVSCALE * v, em);
1326 0 : if (ve > 255)
1327 0 : ve = 255;
1328 : /* combine encodings */
1329 0 : return (Le << 16 | ue << 8 | ve);
1330 : }
1331 :
1332 0 : static void Luv32toXYZ(LogLuvState *sp, uint8_t *op, tmsize_t n)
1333 : {
1334 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
1335 :
1336 0 : while (n-- > 0)
1337 : {
1338 : float xyz[3];
1339 0 : LogLuv32toXYZ(*luv++, xyz);
1340 0 : LogLuvStoreFloatNativeUnaligned(op, xyz[0]);
1341 0 : LogLuvStoreFloatNativeUnaligned(op + sizeof(float), xyz[1]);
1342 0 : LogLuvStoreFloatNativeUnaligned(op + 2 * sizeof(float), xyz[2]);
1343 0 : op += 3 * sizeof(float);
1344 : }
1345 0 : }
1346 :
1347 0 : static void Luv32toLuv48(LogLuvState *sp, uint8_t *op, tmsize_t n)
1348 : {
1349 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
1350 :
1351 0 : while (n-- > 0)
1352 : {
1353 : double u, v;
1354 0 : int16_t luv0 = (int16_t)(*luv >> 16);
1355 : int16_t luv1;
1356 : int16_t luv2;
1357 :
1358 0 : u = 1. / UVSCALE * ((*luv >> 8 & 0xff) + .5);
1359 0 : v = 1. / UVSCALE * ((*luv & 0xff) + .5);
1360 0 : luv1 = (int16_t)(u * (1 << 15));
1361 0 : luv2 = (int16_t)(v * (1 << 15));
1362 0 : LogLuvStore16NativeUnaligned(op, luv0);
1363 0 : LogLuvStore16NativeUnaligned(op + sizeof(int16_t), luv1);
1364 0 : LogLuvStore16NativeUnaligned(op + 2 * sizeof(int16_t), luv2);
1365 0 : op += 3 * sizeof(int16_t);
1366 0 : luv++;
1367 : }
1368 0 : }
1369 :
1370 0 : static void Luv32toRGB(LogLuvState *sp, uint8_t *op, tmsize_t n)
1371 : {
1372 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
1373 0 : uint8_t *rgb = (uint8_t *)op;
1374 :
1375 0 : while (n-- > 0)
1376 : {
1377 : float xyz[3];
1378 :
1379 0 : LogLuv32toXYZ(*luv++, xyz);
1380 0 : XYZtoRGB24(xyz, rgb);
1381 0 : rgb += 3;
1382 : }
1383 0 : }
1384 :
1385 0 : static void Luv32fromXYZ(LogLuvState *sp, uint8_t *op, tmsize_t n)
1386 : {
1387 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
1388 :
1389 0 : while (n-- > 0)
1390 : {
1391 : float xyz[3];
1392 0 : xyz[0] = LogLuvLoadFloatNativeUnaligned(op);
1393 0 : xyz[1] = LogLuvLoadFloatNativeUnaligned(op + sizeof(float));
1394 0 : xyz[2] = LogLuvLoadFloatNativeUnaligned(op + 2 * sizeof(float));
1395 0 : *luv++ = LogLuv32fromXYZ(xyz, sp->encode_meth);
1396 0 : op += 3 * sizeof(float);
1397 : }
1398 0 : }
1399 :
1400 0 : static void Luv32fromLuv48(LogLuvState *sp, uint8_t *op, tmsize_t n)
1401 : {
1402 0 : uint32_t *luv = (uint32_t *)sp->tbuf;
1403 :
1404 0 : if (sp->encode_meth == SGILOGENCODE_NODITHER)
1405 : {
1406 0 : while (n-- > 0)
1407 : {
1408 0 : int16_t luv0 = LogLuvLoad16NativeUnaligned(op);
1409 0 : int16_t luv1 = LogLuvLoad16NativeUnaligned(op + sizeof(int16_t));
1410 : int16_t luv2 =
1411 0 : LogLuvLoad16NativeUnaligned(op + 2 * sizeof(int16_t));
1412 0 : *luv++ = (uint32_t)luv0 << 16 |
1413 0 : ((uint32_t)luv1 * (uint32_t)(UVSCALE + .5) >> 7 & 0xff00) |
1414 0 : ((uint32_t)luv2 * (uint32_t)(UVSCALE + .5) >> 15 & 0xff);
1415 0 : op += 3 * sizeof(int16_t);
1416 : }
1417 0 : return;
1418 : }
1419 0 : while (n-- > 0)
1420 : {
1421 0 : int16_t luv0 = LogLuvLoad16NativeUnaligned(op);
1422 0 : int16_t luv1 = LogLuvLoad16NativeUnaligned(op + sizeof(int16_t));
1423 0 : int16_t luv2 = LogLuvLoad16NativeUnaligned(op + 2 * sizeof(int16_t));
1424 0 : *luv++ = (uint32_t)luv0 << 16 |
1425 0 : ((uint32_t)tiff_itrunc(luv1 * (UVSCALE / (1 << 15)),
1426 : sp->encode_meth)
1427 0 : << 8 &
1428 0 : 0xff00) |
1429 0 : ((uint32_t)tiff_itrunc(luv2 * (UVSCALE / (1 << 15)),
1430 0 : sp->encode_meth) &
1431 : 0xff);
1432 0 : op += 3 * sizeof(int16_t);
1433 : }
1434 : }
1435 :
1436 0 : static void _logLuvNop(LogLuvState *sp, uint8_t *op, tmsize_t n)
1437 : {
1438 : (void)sp;
1439 : (void)op;
1440 : (void)n;
1441 0 : }
1442 :
1443 1 : static int LogL16GuessDataFmt(TIFFDirectory *td)
1444 : {
1445 : #define PACK(s, b, f) (((b) << 6) | ((s) << 3) | (f))
1446 1 : switch (
1447 1 : PACK(td->td_samplesperpixel, td->td_bitspersample, td->td_sampleformat))
1448 : {
1449 0 : case PACK(1, 32, SAMPLEFORMAT_IEEEFP):
1450 0 : return (SGILOGDATAFMT_FLOAT);
1451 1 : case PACK(1, 16, SAMPLEFORMAT_VOID):
1452 : case PACK(1, 16, SAMPLEFORMAT_INT):
1453 : case PACK(1, 16, SAMPLEFORMAT_UINT):
1454 1 : return (SGILOGDATAFMT_16BIT);
1455 0 : case PACK(1, 8, SAMPLEFORMAT_VOID):
1456 : case PACK(1, 8, SAMPLEFORMAT_UINT):
1457 0 : return (SGILOGDATAFMT_8BIT);
1458 0 : default:
1459 0 : break;
1460 : }
1461 : #undef PACK
1462 0 : return (SGILOGDATAFMT_UNKNOWN);
1463 : }
1464 :
1465 4 : static tmsize_t multiply_ms(tmsize_t m1, tmsize_t m2)
1466 : {
1467 4 : return _TIFFMultiplySSize(NULL, m1, m2, NULL);
1468 : }
1469 :
1470 2 : static int LogL16InitState(TIFF *tif)
1471 : {
1472 : static const char module[] = "LogL16InitState";
1473 2 : TIFFDirectory *td = &tif->tif_dir;
1474 2 : LogLuvState *sp = DecoderState(tif);
1475 :
1476 2 : assert(sp != NULL);
1477 2 : assert(td->td_photometric == PHOTOMETRIC_LOGL);
1478 :
1479 2 : if (td->td_samplesperpixel != 1)
1480 : {
1481 0 : TIFFErrorExtR(tif, module,
1482 : "Sorry, can not handle LogL image with %s=%" PRIu16,
1483 0 : "Samples/pixel", td->td_samplesperpixel);
1484 0 : return 0;
1485 : }
1486 :
1487 : /* for some reason, we can't do this in TIFFInitLogL16 */
1488 2 : if (sp->user_datafmt == SGILOGDATAFMT_UNKNOWN)
1489 1 : sp->user_datafmt = LogL16GuessDataFmt(td);
1490 2 : switch (sp->user_datafmt)
1491 : {
1492 0 : case SGILOGDATAFMT_FLOAT:
1493 0 : sp->pixel_size = sizeof(float);
1494 0 : break;
1495 1 : case SGILOGDATAFMT_16BIT:
1496 1 : sp->pixel_size = sizeof(int16_t);
1497 1 : break;
1498 1 : case SGILOGDATAFMT_8BIT:
1499 1 : sp->pixel_size = sizeof(uint8_t);
1500 1 : break;
1501 0 : default:
1502 0 : TIFFErrorExtR(tif, module,
1503 : "No support for converting user data format to LogL");
1504 0 : return (0);
1505 : }
1506 2 : if (isTiled(tif))
1507 0 : sp->tbuflen = multiply_ms(td->td_tilewidth, td->td_tilelength);
1508 2 : else if (td->td_rowsperstrip < td->td_imagelength)
1509 0 : sp->tbuflen = multiply_ms(td->td_imagewidth, td->td_rowsperstrip);
1510 : else
1511 2 : sp->tbuflen = multiply_ms(td->td_imagewidth, td->td_imagelength);
1512 2 : if (multiply_ms(sp->tbuflen, sizeof(int16_t)) == 0 ||
1513 2 : (sp->tbuf = (uint8_t *)_TIFFmallocExt(
1514 2 : tif, (tmsize_t)((size_t)sp->tbuflen * sizeof(int16_t)))) == NULL)
1515 : {
1516 0 : TIFFErrorExtR(tif, module, "No space for SGILog translation buffer");
1517 0 : return (0);
1518 : }
1519 2 : return (1);
1520 : }
1521 :
1522 0 : static int LogLuvGuessDataFmt(TIFFDirectory *td)
1523 : {
1524 : int guess;
1525 :
1526 : /*
1527 : * If the user didn't tell us their datafmt,
1528 : * take our best guess from the bitspersample.
1529 : */
1530 : #define PACK(a, b) (((a) << 3) | (b))
1531 0 : switch (PACK(td->td_bitspersample, td->td_sampleformat))
1532 : {
1533 0 : case PACK(32, SAMPLEFORMAT_IEEEFP):
1534 0 : guess = SGILOGDATAFMT_FLOAT;
1535 0 : break;
1536 0 : case PACK(32, SAMPLEFORMAT_VOID):
1537 : case PACK(32, SAMPLEFORMAT_UINT):
1538 : case PACK(32, SAMPLEFORMAT_INT):
1539 0 : guess = SGILOGDATAFMT_RAW;
1540 0 : break;
1541 0 : case PACK(16, SAMPLEFORMAT_VOID):
1542 : case PACK(16, SAMPLEFORMAT_INT):
1543 : case PACK(16, SAMPLEFORMAT_UINT):
1544 0 : guess = SGILOGDATAFMT_16BIT;
1545 0 : break;
1546 0 : case PACK(8, SAMPLEFORMAT_VOID):
1547 : case PACK(8, SAMPLEFORMAT_UINT):
1548 0 : guess = SGILOGDATAFMT_8BIT;
1549 0 : break;
1550 0 : default:
1551 0 : guess = SGILOGDATAFMT_UNKNOWN;
1552 0 : break;
1553 : #undef PACK
1554 : }
1555 : /*
1556 : * Double-check samples per pixel.
1557 : */
1558 0 : switch (td->td_samplesperpixel)
1559 : {
1560 0 : case 1:
1561 0 : if (guess != SGILOGDATAFMT_RAW)
1562 0 : guess = SGILOGDATAFMT_UNKNOWN;
1563 0 : break;
1564 0 : case 3:
1565 0 : if (guess == SGILOGDATAFMT_RAW)
1566 0 : guess = SGILOGDATAFMT_UNKNOWN;
1567 0 : break;
1568 0 : default:
1569 0 : guess = SGILOGDATAFMT_UNKNOWN;
1570 0 : break;
1571 : }
1572 0 : return (guess);
1573 : }
1574 :
1575 0 : static int LogLuvInitState(TIFF *tif)
1576 : {
1577 : static const char module[] = "LogLuvInitState";
1578 0 : TIFFDirectory *td = &tif->tif_dir;
1579 0 : LogLuvState *sp = DecoderState(tif);
1580 :
1581 0 : assert(sp != NULL);
1582 0 : assert(td->td_photometric == PHOTOMETRIC_LOGLUV);
1583 :
1584 : /* for some reason, we can't do this in TIFFInitLogLuv */
1585 0 : if (td->td_planarconfig != PLANARCONFIG_CONTIG)
1586 : {
1587 0 : TIFFErrorExtR(tif, module,
1588 : "SGILog compression cannot handle non-contiguous data");
1589 0 : return (0);
1590 : }
1591 0 : if (sp->user_datafmt == SGILOGDATAFMT_UNKNOWN)
1592 0 : sp->user_datafmt = LogLuvGuessDataFmt(td);
1593 0 : switch (sp->user_datafmt)
1594 : {
1595 0 : case SGILOGDATAFMT_FLOAT:
1596 0 : sp->pixel_size = 3 * sizeof(float);
1597 0 : break;
1598 0 : case SGILOGDATAFMT_16BIT:
1599 0 : sp->pixel_size = 3 * sizeof(int16_t);
1600 0 : break;
1601 0 : case SGILOGDATAFMT_RAW:
1602 0 : sp->pixel_size = sizeof(uint32_t);
1603 0 : break;
1604 0 : case SGILOGDATAFMT_8BIT:
1605 0 : sp->pixel_size = 3 * sizeof(uint8_t);
1606 0 : break;
1607 0 : default:
1608 0 : TIFFErrorExtR(
1609 : tif, module,
1610 : "No support for converting user data format to LogLuv");
1611 0 : return (0);
1612 : }
1613 0 : if (isTiled(tif))
1614 0 : sp->tbuflen = multiply_ms(td->td_tilewidth, td->td_tilelength);
1615 0 : else if (td->td_rowsperstrip < td->td_imagelength)
1616 0 : sp->tbuflen = multiply_ms(td->td_imagewidth, td->td_rowsperstrip);
1617 : else
1618 0 : sp->tbuflen = multiply_ms(td->td_imagewidth, td->td_imagelength);
1619 0 : if (multiply_ms(sp->tbuflen, sizeof(uint32_t)) == 0 ||
1620 0 : (sp->tbuf = (uint8_t *)_TIFFmallocExt(
1621 0 : tif, (tmsize_t)((size_t)sp->tbuflen * sizeof(uint32_t)))) == NULL)
1622 : {
1623 0 : TIFFErrorExtR(tif, module, "No space for SGILog translation buffer");
1624 0 : return (0);
1625 : }
1626 0 : return (1);
1627 : }
1628 :
1629 3 : static int LogLuvFixupTags(TIFF *tif)
1630 : {
1631 : (void)tif;
1632 3 : return (1);
1633 : }
1634 :
1635 2 : static int LogLuvSetupDecode(TIFF *tif)
1636 : {
1637 : static const char module[] = "LogLuvSetupDecode";
1638 2 : LogLuvState *sp = DecoderState(tif);
1639 2 : TIFFDirectory *td = &tif->tif_dir;
1640 :
1641 2 : tif->tif_postdecode = _TIFFNoPostDecode;
1642 2 : switch (td->td_photometric)
1643 : {
1644 0 : case PHOTOMETRIC_LOGLUV:
1645 0 : if (!LogLuvInitState(tif))
1646 0 : break;
1647 0 : if (td->td_compression == COMPRESSION_SGILOG24)
1648 : {
1649 0 : tif->tif_decoderow = LogLuvDecode24;
1650 0 : switch (sp->user_datafmt)
1651 : {
1652 0 : case SGILOGDATAFMT_FLOAT:
1653 0 : sp->tfunc = Luv24toXYZ;
1654 0 : break;
1655 0 : case SGILOGDATAFMT_16BIT:
1656 0 : sp->tfunc = Luv24toLuv48;
1657 0 : break;
1658 0 : case SGILOGDATAFMT_8BIT:
1659 0 : sp->tfunc = Luv24toRGB;
1660 0 : break;
1661 0 : default:
1662 0 : break;
1663 : }
1664 : }
1665 : else
1666 : {
1667 0 : tif->tif_decoderow = LogLuvDecode32;
1668 0 : switch (sp->user_datafmt)
1669 : {
1670 0 : case SGILOGDATAFMT_FLOAT:
1671 0 : sp->tfunc = Luv32toXYZ;
1672 0 : break;
1673 0 : case SGILOGDATAFMT_16BIT:
1674 0 : sp->tfunc = Luv32toLuv48;
1675 0 : break;
1676 0 : case SGILOGDATAFMT_8BIT:
1677 0 : sp->tfunc = Luv32toRGB;
1678 0 : break;
1679 0 : default:
1680 0 : break;
1681 : }
1682 : }
1683 0 : return (1);
1684 2 : case PHOTOMETRIC_LOGL:
1685 2 : if (!LogL16InitState(tif))
1686 0 : break;
1687 2 : tif->tif_decoderow = LogL16Decode;
1688 2 : switch (sp->user_datafmt)
1689 : {
1690 0 : case SGILOGDATAFMT_FLOAT:
1691 0 : sp->tfunc = L16toY;
1692 0 : break;
1693 1 : case SGILOGDATAFMT_8BIT:
1694 1 : sp->tfunc = L16toGry;
1695 1 : break;
1696 1 : default:
1697 1 : break;
1698 : }
1699 2 : return (1);
1700 0 : default:
1701 0 : TIFFErrorExtR(tif, module,
1702 : "Inappropriate photometric interpretation %" PRIu16
1703 : " for SGILog compression; %s",
1704 0 : td->td_photometric, "must be either LogLUV or LogL");
1705 0 : break;
1706 : }
1707 0 : return (0);
1708 : }
1709 :
1710 0 : static int LogLuvSetupEncode(TIFF *tif)
1711 : {
1712 : static const char module[] = "LogLuvSetupEncode";
1713 0 : LogLuvState *sp = EncoderState(tif);
1714 0 : TIFFDirectory *td = &tif->tif_dir;
1715 :
1716 0 : switch (td->td_photometric)
1717 : {
1718 0 : case PHOTOMETRIC_LOGLUV:
1719 0 : if (!LogLuvInitState(tif))
1720 0 : return (0);
1721 0 : if (td->td_compression == COMPRESSION_SGILOG24)
1722 : {
1723 0 : tif->tif_encoderow = LogLuvEncode24;
1724 0 : switch (sp->user_datafmt)
1725 : {
1726 0 : case SGILOGDATAFMT_FLOAT:
1727 0 : sp->tfunc = Luv24fromXYZ;
1728 0 : break;
1729 0 : case SGILOGDATAFMT_16BIT:
1730 0 : sp->tfunc = Luv24fromLuv48;
1731 0 : break;
1732 0 : case SGILOGDATAFMT_RAW:
1733 0 : break;
1734 0 : default:
1735 0 : goto notsupported;
1736 : }
1737 : }
1738 : else
1739 : {
1740 0 : tif->tif_encoderow = LogLuvEncode32;
1741 0 : switch (sp->user_datafmt)
1742 : {
1743 0 : case SGILOGDATAFMT_FLOAT:
1744 0 : sp->tfunc = Luv32fromXYZ;
1745 0 : break;
1746 0 : case SGILOGDATAFMT_16BIT:
1747 0 : sp->tfunc = Luv32fromLuv48;
1748 0 : break;
1749 0 : case SGILOGDATAFMT_RAW:
1750 0 : break;
1751 0 : default:
1752 0 : goto notsupported;
1753 : }
1754 : }
1755 0 : break;
1756 0 : case PHOTOMETRIC_LOGL:
1757 0 : if (!LogL16InitState(tif))
1758 0 : return (0);
1759 0 : tif->tif_encoderow = LogL16Encode;
1760 0 : switch (sp->user_datafmt)
1761 : {
1762 0 : case SGILOGDATAFMT_FLOAT:
1763 0 : sp->tfunc = L16fromY;
1764 0 : break;
1765 0 : case SGILOGDATAFMT_16BIT:
1766 0 : break;
1767 0 : default:
1768 0 : goto notsupported;
1769 : }
1770 0 : break;
1771 0 : default:
1772 0 : TIFFErrorExtR(tif, module,
1773 : "Inappropriate photometric interpretation %" PRIu16
1774 : " for SGILog compression; %s",
1775 0 : td->td_photometric, "must be either LogLUV or LogL");
1776 0 : return (0);
1777 : }
1778 0 : sp->encoder_state = 1;
1779 0 : return (1);
1780 0 : notsupported:
1781 0 : TIFFErrorExtR(tif, module,
1782 : "SGILog compression supported only for %s, or raw data",
1783 0 : td->td_photometric == PHOTOMETRIC_LOGL ? "Y, L" : "XYZ, Luv");
1784 0 : return (0);
1785 : }
1786 :
1787 0 : static void LogLuvClose(TIFF *tif)
1788 : {
1789 0 : LogLuvState *sp = (LogLuvState *)tif->tif_data;
1790 0 : TIFFDirectory *td = &tif->tif_dir;
1791 :
1792 0 : assert(sp != 0);
1793 : /*
1794 : * For consistency, we always want to write out the same
1795 : * bitspersample and sampleformat for our TIFF file,
1796 : * regardless of the data format being used by the application.
1797 : * Since this routine is called after tags have been set but
1798 : * before they have been recorded in the file, we reset them here.
1799 : * Note: this is really a nasty approach. See PixarLogClose
1800 : */
1801 0 : if (sp->encoder_state)
1802 : {
1803 : /* See PixarLogClose. Might avoid issues with tags whose size depends
1804 : * on those below, but not completely sure this is enough. */
1805 0 : td->td_samplesperpixel =
1806 0 : (td->td_photometric == PHOTOMETRIC_LOGL) ? 1 : 3;
1807 0 : td->td_bitspersample = 16;
1808 0 : td->td_sampleformat = SAMPLEFORMAT_INT;
1809 : }
1810 0 : }
1811 :
1812 3 : static void LogLuvCleanup(TIFF *tif)
1813 : {
1814 3 : LogLuvState *sp = (LogLuvState *)tif->tif_data;
1815 :
1816 3 : assert(sp != 0);
1817 :
1818 3 : tif->tif_tagmethods.vgetfield = sp->vgetparent;
1819 3 : tif->tif_tagmethods.vsetfield = sp->vsetparent;
1820 :
1821 3 : if (sp->tbuf)
1822 2 : _TIFFfreeExt(tif, sp->tbuf);
1823 3 : _TIFFfreeExt(tif, sp);
1824 3 : tif->tif_data = NULL;
1825 :
1826 3 : _TIFFSetDefaultCompressionState(tif);
1827 3 : }
1828 :
1829 27 : static int LogLuvVSetField(TIFF *tif, uint32_t tag, va_list ap)
1830 : {
1831 : static const char module[] = "LogLuvVSetField";
1832 27 : LogLuvState *sp = DecoderState(tif);
1833 : int bps, fmt;
1834 :
1835 27 : switch (tag)
1836 : {
1837 1 : case TIFFTAG_SGILOGDATAFMT:
1838 1 : sp->user_datafmt = (int)va_arg(ap, int);
1839 : /*
1840 : * Tweak the TIFF header so that the rest of libtiff knows what
1841 : * size of data will be passed between app and library, and
1842 : * assume that the app knows what it is doing and is not
1843 : * confused by these header manipulations...
1844 : */
1845 1 : switch (sp->user_datafmt)
1846 : {
1847 0 : case SGILOGDATAFMT_FLOAT:
1848 0 : bps = 32;
1849 0 : fmt = SAMPLEFORMAT_IEEEFP;
1850 0 : break;
1851 0 : case SGILOGDATAFMT_16BIT:
1852 0 : bps = 16;
1853 0 : fmt = SAMPLEFORMAT_INT;
1854 0 : break;
1855 0 : case SGILOGDATAFMT_RAW:
1856 0 : bps = 32;
1857 0 : fmt = SAMPLEFORMAT_UINT;
1858 0 : TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
1859 0 : break;
1860 1 : case SGILOGDATAFMT_8BIT:
1861 1 : bps = 8;
1862 1 : fmt = SAMPLEFORMAT_UINT;
1863 1 : break;
1864 0 : default:
1865 0 : TIFFErrorExtR(
1866 0 : tif, tif->tif_name,
1867 : "Unknown data format %d for LogLuv compression",
1868 : sp->user_datafmt);
1869 0 : return (0);
1870 : }
1871 1 : TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bps);
1872 1 : TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, fmt);
1873 : /*
1874 : * Must recalculate sizes should bits/sample change.
1875 : */
1876 1 : tif->tif_dir.td_tilesize =
1877 1 : isTiled(tif) ? TIFFTileSize(tif) : (tmsize_t)-1;
1878 1 : tif->tif_dir.td_scanlinesize = TIFFScanlineSize(tif);
1879 1 : return (1);
1880 0 : case TIFFTAG_SGILOGENCODE:
1881 0 : sp->encode_meth = (int)va_arg(ap, int);
1882 0 : if (sp->encode_meth != SGILOGENCODE_NODITHER &&
1883 0 : sp->encode_meth != SGILOGENCODE_RANDITHER)
1884 : {
1885 0 : TIFFErrorExtR(tif, module,
1886 : "Unknown encoding %d for LogLuv compression",
1887 : sp->encode_meth);
1888 0 : return (0);
1889 : }
1890 0 : return (1);
1891 26 : default:
1892 26 : return (*sp->vsetparent)(tif, tag, ap);
1893 : }
1894 : }
1895 :
1896 49 : static int LogLuvVGetField(TIFF *tif, uint32_t tag, va_list ap)
1897 : {
1898 49 : LogLuvState *sp = (LogLuvState *)tif->tif_data;
1899 :
1900 49 : switch (tag)
1901 : {
1902 0 : case TIFFTAG_SGILOGDATAFMT:
1903 0 : *va_arg(ap, int *) = sp->user_datafmt;
1904 0 : return (1);
1905 49 : default:
1906 49 : return (*sp->vgetparent)(tif, tag, ap);
1907 : }
1908 : }
1909 :
1910 : static const TIFFField LogLuvFields[] = {
1911 : {TIFFTAG_SGILOGDATAFMT, 0, 0, TIFF_SHORT, 0, TIFF_SETGET_INT, FIELD_PSEUDO,
1912 : TRUE, FALSE, "SGILogDataFmt", NULL},
1913 : {TIFFTAG_SGILOGENCODE, 0, 0, TIFF_SHORT, 0, TIFF_SETGET_INT, FIELD_PSEUDO,
1914 : TRUE, FALSE, "SGILogEncode", NULL}};
1915 :
1916 3 : int TIFFInitSGILog(TIFF *tif, int scheme)
1917 : {
1918 : static const char module[] = "TIFFInitSGILog";
1919 : LogLuvState *sp;
1920 :
1921 3 : assert(scheme == COMPRESSION_SGILOG24 || scheme == COMPRESSION_SGILOG);
1922 :
1923 : /*
1924 : * Merge codec-specific tag information.
1925 : */
1926 3 : if (!_TIFFMergeFields(tif, LogLuvFields, TIFFArrayCount(LogLuvFields)))
1927 : {
1928 0 : TIFFErrorExtR(tif, module, "Merging SGILog codec-specific tags failed");
1929 0 : return 0;
1930 : }
1931 :
1932 : /*
1933 : * Allocate state block so tag methods have storage to record values.
1934 : */
1935 3 : tif->tif_data = (uint8_t *)_TIFFmallocExt(tif, sizeof(LogLuvState));
1936 3 : if (tif->tif_data == NULL)
1937 0 : goto bad;
1938 3 : sp = (LogLuvState *)tif->tif_data;
1939 3 : _TIFFmemset((void *)sp, 0, sizeof(*sp));
1940 3 : sp->user_datafmt = SGILOGDATAFMT_UNKNOWN;
1941 3 : sp->encode_meth = (scheme == COMPRESSION_SGILOG24) ? SGILOGENCODE_RANDITHER
1942 3 : : SGILOGENCODE_NODITHER;
1943 3 : sp->tfunc = _logLuvNop;
1944 :
1945 : /*
1946 : * Install codec methods.
1947 : * NB: tif_decoderow & tif_encoderow are filled
1948 : * in at setup time.
1949 : */
1950 3 : tif->tif_fixuptags = LogLuvFixupTags;
1951 3 : tif->tif_setupdecode = LogLuvSetupDecode;
1952 3 : tif->tif_decodestrip = LogLuvDecodeStrip;
1953 3 : tif->tif_decodetile = LogLuvDecodeTile;
1954 3 : tif->tif_setupencode = LogLuvSetupEncode;
1955 3 : tif->tif_encodestrip = LogLuvEncodeStrip;
1956 3 : tif->tif_encodetile = LogLuvEncodeTile;
1957 3 : tif->tif_close = LogLuvClose;
1958 3 : tif->tif_cleanup = LogLuvCleanup;
1959 :
1960 : /*
1961 : * Override parent get/set field methods.
1962 : */
1963 3 : sp->vgetparent = tif->tif_tagmethods.vgetfield;
1964 3 : tif->tif_tagmethods.vgetfield = LogLuvVGetField; /* hook for codec tags */
1965 3 : sp->vsetparent = tif->tif_tagmethods.vsetfield;
1966 3 : tif->tif_tagmethods.vsetfield = LogLuvVSetField; /* hook for codec tags */
1967 :
1968 3 : return (1);
1969 0 : bad:
1970 0 : TIFFErrorExtR(tif, module, "%s: No space for LogLuv state block",
1971 : tif->tif_name);
1972 0 : return (0);
1973 : }
1974 : #endif /* LOGLUV_SUPPORT */
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