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tif_pixarlog.c
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1 /* $Id: tif_pixarlog.c,v 1.15.2.4 2010-06-08 18:50:42 bfriesen Exp $ */
2
3 /*
4 * Copyright (c) 1996-1997 Sam Leffler
5 * Copyright (c) 1996 Pixar
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 * Pixar, 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 Pixar, 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 PIXAR, 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 #include "tiffiop.h"
28 #ifdef PIXARLOG_SUPPORT
29
30 /*
31 * TIFF Library.
32 * PixarLog Compression Support
33 *
34 * Contributed by Dan McCoy.
35 *
36 * PixarLog film support uses the TIFF library to store companded
37 * 11 bit values into a tiff file, which are compressed using the
38 * zip compressor.
39 *
40 * The codec can take as input and produce as output 32-bit IEEE float values
41 * as well as 16-bit or 8-bit unsigned integer values.
42 *
43 * On writing any of the above are converted into the internal
44 * 11-bit log format. In the case of 8 and 16 bit values, the
45 * input is assumed to be unsigned linear color values that represent
46 * the range 0-1. In the case of IEEE values, the 0-1 range is assumed to
47 * be the normal linear color range, in addition over 1 values are
48 * accepted up to a value of about 25.0 to encode "hot" hightlights and such.
49 * The encoding is lossless for 8-bit values, slightly lossy for the
50 * other bit depths. The actual color precision should be better
51 * than the human eye can perceive with extra room to allow for
52 * error introduced by further image computation. As with any quantized
53 * color format, it is possible to perform image calculations which
54 * expose the quantization error. This format should certainly be less
55 * susceptable to such errors than standard 8-bit encodings, but more
56 * susceptable than straight 16-bit or 32-bit encodings.
57 *
58 * On reading the internal format is converted to the desired output format.
59 * The program can request which format it desires by setting the internal
60 * pseudo tag TIFFTAG_PIXARLOGDATAFMT to one of these possible values:
61 * PIXARLOGDATAFMT_FLOAT = provide IEEE float values.
62 * PIXARLOGDATAFMT_16BIT = provide unsigned 16-bit integer values
63 * PIXARLOGDATAFMT_8BIT = provide unsigned 8-bit integer values
64 *
65 * alternately PIXARLOGDATAFMT_8BITABGR provides unsigned 8-bit integer
66 * values with the difference that if there are exactly three or four channels
67 * (rgb or rgba) it swaps the channel order (bgr or abgr).
68 *
69 * PIXARLOGDATAFMT_11BITLOG provides the internal encoding directly
70 * packed in 16-bit values. However no tools are supplied for interpreting
71 * these values.
72 *
73 * "hot" (over 1.0) areas written in floating point get clamped to
74 * 1.0 in the integer data types.
75 *
76 * When the file is closed after writing, the bit depth and sample format
77 * are set always to appear as if 8-bit data has been written into it.
78 * That way a naive program unaware of the particulars of the encoding
79 * gets the format it is most likely able to handle.
80 *
81 * The codec does it's own horizontal differencing step on the coded
82 * values so the libraries predictor stuff should be turned off.
83 * The codec also handle byte swapping the encoded values as necessary
84 * since the library does not have the information necessary
85 * to know the bit depth of the raw unencoded buffer.
86 *
87 */
88
89 #include "tif_predict.h"
90 #include "zlib.h"
91
92 #include <stdio.h>
93 #include <stdlib.h>
94 #include <math.h>
95
96 /* Tables for converting to/from 11 bit coded values */
97
98 #define TSIZE 2048 /* decode table size (11-bit tokens) */
99 #define TSIZEP1 2049 /* Plus one for slop */
100 #define ONE 1250 /* token value of 1.0 exactly */
101 #define RATIO 1.004 /* nominal ratio for log part */
102
103 #define CODE_MASK 0x7ff /* 11 bits. */
104
105 static float Fltsize;
106 static float LogK1, LogK2;
107
108 #define REPEAT(n, op) { int i; i=n; do { i--; op; } while (i>0); }
109
110 static void
111 horizontalAccumulateF(uint16 *wp, int n, int stride, float *op,
112 float *ToLinearF)
113 {
114 register unsigned int cr, cg, cb, ca, mask;
115 register float t0, t1, t2, t3;
116
117 if (n >= stride) {
118 mask = CODE_MASK;
119 if (stride == 3) {
120 t0 = ToLinearF[cr = wp[0]];
121 t1 = ToLinearF[cg = wp[1]];
122 t2 = ToLinearF[cb = wp[2]];
123 op[0] = t0;
124 op[1] = t1;
125 op[2] = t2;
126 n -= 3;
127 while (n > 0) {
128 wp += 3;
129 op += 3;
130 n -= 3;
131 t0 = ToLinearF[(cr += wp[0]) & mask];
132 t1 = ToLinearF[(cg += wp[1]) & mask];
133 t2 = ToLinearF[(cb += wp[2]) & mask];
134 op[0] = t0;
135 op[1] = t1;
136 op[2] = t2;
137 }
138 } else if (stride == 4) {
139 t0 = ToLinearF[cr = wp[0]];
140 t1 = ToLinearF[cg = wp[1]];
141 t2 = ToLinearF[cb = wp[2]];
142 t3 = ToLinearF[ca = wp[3]];
143 op[0] = t0;
144 op[1] = t1;
145 op[2] = t2;
146 op[3] = t3;
147 n -= 4;
148 while (n > 0) {
149 wp += 4;
150 op += 4;
151 n -= 4;
152 t0 = ToLinearF[(cr += wp[0]) & mask];
153 t1 = ToLinearF[(cg += wp[1]) & mask];
154 t2 = ToLinearF[(cb += wp[2]) & mask];
155 t3 = ToLinearF[(ca += wp[3]) & mask];
156 op[0] = t0;
157 op[1] = t1;
158 op[2] = t2;
159 op[3] = t3;
160 }
161 } else {
162 REPEAT(stride, *op = ToLinearF[*wp&mask]; wp++; op++)
163 n -= stride;
164 while (n > 0) {
165 REPEAT(stride,
166 wp[stride] += *wp; *op = ToLinearF[*wp&mask]; wp++; op++)
167 n -= stride;
168 }
169 }
170 }
171 }
172
173 static void
174 horizontalAccumulate12(uint16 *wp, int n, int stride, int16 *op,
175 float *ToLinearF)
176 {
177 register unsigned int cr, cg, cb, ca, mask;
178 register float t0, t1, t2, t3;
179
180 #define SCALE12 2048.0F
181 #define CLAMP12(t) (((t) < 3071) ? (uint16) (t) : 3071)
182
183 if (n >= stride) {
184 mask = CODE_MASK;
185 if (stride == 3) {
186 t0 = ToLinearF[cr = wp[0]] * SCALE12;
187 t1 = ToLinearF[cg = wp[1]] * SCALE12;
188 t2 = ToLinearF[cb = wp[2]] * SCALE12;
189 op[0] = CLAMP12(t0);
190 op[1] = CLAMP12(t1);
191 op[2] = CLAMP12(t2);
192 n -= 3;
193 while (n > 0) {
194 wp += 3;
195 op += 3;
196 n -= 3;
197 t0 = ToLinearF[(cr += wp[0]) & mask] * SCALE12;
198 t1 = ToLinearF[(cg += wp[1]) & mask] * SCALE12;
199 t2 = ToLinearF[(cb += wp[2]) & mask] * SCALE12;
200 op[0] = CLAMP12(t0);
201 op[1] = CLAMP12(t1);
202 op[2] = CLAMP12(t2);
203 }
204 } else if (stride == 4) {
205 t0 = ToLinearF[cr = wp[0]] * SCALE12;
206 t1 = ToLinearF[cg = wp[1]] * SCALE12;
207 t2 = ToLinearF[cb = wp[2]] * SCALE12;
208 t3 = ToLinearF[ca = wp[3]] * SCALE12;
209 op[0] = CLAMP12(t0);
210 op[1] = CLAMP12(t1);
211 op[2] = CLAMP12(t2);
212 op[3] = CLAMP12(t3);
213 n -= 4;
214 while (n > 0) {
215 wp += 4;
216 op += 4;
217 n -= 4;
218 t0 = ToLinearF[(cr += wp[0]) & mask] * SCALE12;
219 t1 = ToLinearF[(cg += wp[1]) & mask] * SCALE12;
220 t2 = ToLinearF[(cb += wp[2]) & mask] * SCALE12;
221 t3 = ToLinearF[(ca += wp[3]) & mask] * SCALE12;
222 op[0] = CLAMP12(t0);
223 op[1] = CLAMP12(t1);
224 op[2] = CLAMP12(t2);
225 op[3] = CLAMP12(t3);
226 }
227 } else {
228 REPEAT(stride, t0 = ToLinearF[*wp&mask] * SCALE12;
229 *op = CLAMP12(t0); wp++; op++)
230 n -= stride;
231 while (n > 0) {
232 REPEAT(stride,
233 wp[stride] += *wp; t0 = ToLinearF[wp[stride]&mask]*SCALE12;
234 *op = CLAMP12(t0); wp++; op++)
235 n -= stride;
236 }
237 }
238 }
239 }
240
241 static void
242 horizontalAccumulate16(uint16 *wp, int n, int stride, uint16 *op,
243 uint16 *ToLinear16)
244 {
245 register unsigned int cr, cg, cb, ca, mask;
246
247 if (n >= stride) {
248 mask = CODE_MASK;
249 if (stride == 3) {
250 op[0] = ToLinear16[cr = wp[0]];
251 op[1] = ToLinear16[cg = wp[1]];
252 op[2] = ToLinear16[cb = wp[2]];
253 n -= 3;
254 while (n > 0) {
255 wp += 3;
256 op += 3;
257 n -= 3;
258 op[0] = ToLinear16[(cr += wp[0]) & mask];
259 op[1] = ToLinear16[(cg += wp[1]) & mask];
260 op[2] = ToLinear16[(cb += wp[2]) & mask];
261 }
262 } else if (stride == 4) {
263 op[0] = ToLinear16[cr = wp[0]];
264 op[1] = ToLinear16[cg = wp[1]];
265 op[2] = ToLinear16[cb = wp[2]];
266 op[3] = ToLinear16[ca = wp[3]];
267 n -= 4;
268 while (n > 0) {
269 wp += 4;
270 op += 4;
271 n -= 4;
272 op[0] = ToLinear16[(cr += wp[0]) & mask];
273 op[1] = ToLinear16[(cg += wp[1]) & mask];
274 op[2] = ToLinear16[(cb += wp[2]) & mask];
275 op[3] = ToLinear16[(ca += wp[3]) & mask];
276 }
277 } else {
278 REPEAT(stride, *op = ToLinear16[*wp&mask]; wp++; op++)
279 n -= stride;
280 while (n > 0) {
281 REPEAT(stride,
282 wp[stride] += *wp; *op = ToLinear16[*wp&mask]; wp++; op++)
283 n -= stride;
284 }
285 }
286 }
287 }
288
289 /*
290 * Returns the log encoded 11-bit values with the horizontal
291 * differencing undone.
292 */
293 static void
294 horizontalAccumulate11(uint16 *wp, int n, int stride, uint16 *op)
295 {
296 register unsigned int cr, cg, cb, ca, mask;
297
298 if (n >= stride) {
299 mask = CODE_MASK;
300 if (stride == 3) {
301 op[0] = cr = wp[0]; op[1] = cg = wp[1]; op[2] = cb = wp[2];
302 n -= 3;
303 while (n > 0) {
304 wp += 3;
305 op += 3;
306 n -= 3;
307 op[0] = (cr += wp[0]) & mask;
308 op[1] = (cg += wp[1]) & mask;
309 op[2] = (cb += wp[2]) & mask;
310 }
311 } else if (stride == 4) {
312 op[0] = cr = wp[0]; op[1] = cg = wp[1];
313 op[2] = cb = wp[2]; op[3] = ca = wp[3];
314 n -= 4;
315 while (n > 0) {
316 wp += 4;
317 op += 4;
318 n -= 4;
319 op[0] = (cr += wp[0]) & mask;
320 op[1] = (cg += wp[1]) & mask;
321 op[2] = (cb += wp[2]) & mask;
322 op[3] = (ca += wp[3]) & mask;
323 }
324 } else {
325 REPEAT(stride, *op = *wp&mask; wp++; op++)
326 n -= stride;
327 while (n > 0) {
328 REPEAT(stride,
329 wp[stride] += *wp; *op = *wp&mask; wp++; op++)
330 n -= stride;
331 }
332 }
333 }
334 }
335
336 static void
337 horizontalAccumulate8(uint16 *wp, int n, int stride, unsigned char *op,
338 unsigned char *ToLinear8)
339 {
340 register unsigned int cr, cg, cb, ca, mask;
341
342 if (n >= stride) {
343 mask = CODE_MASK;
344 if (stride == 3) {
345 op[0] = ToLinear8[cr = wp[0]];
346 op[1] = ToLinear8[cg = wp[1]];
347 op[2] = ToLinear8[cb = wp[2]];
348 n -= 3;
349 while (n > 0) {
350 n -= 3;
351 wp += 3;
352 op += 3;
353 op[0] = ToLinear8[(cr += wp[0]) & mask];
354 op[1] = ToLinear8[(cg += wp[1]) & mask];
355 op[2] = ToLinear8[(cb += wp[2]) & mask];
356 }
357 } else if (stride == 4) {
358 op[0] = ToLinear8[cr = wp[0]];
359 op[1] = ToLinear8[cg = wp[1]];
360 op[2] = ToLinear8[cb = wp[2]];
361 op[3] = ToLinear8[ca = wp[3]];
362 n -= 4;
363 while (n > 0) {
364 n -= 4;
365 wp += 4;
366 op += 4;
367 op[0] = ToLinear8[(cr += wp[0]) & mask];
368 op[1] = ToLinear8[(cg += wp[1]) & mask];
369 op[2] = ToLinear8[(cb += wp[2]) & mask];
370 op[3] = ToLinear8[(ca += wp[3]) & mask];
371 }
372 } else {
373 REPEAT(stride, *op = ToLinear8[*wp&mask]; wp++; op++)
374 n -= stride;
375 while (n > 0) {
376 REPEAT(stride,
377 wp[stride] += *wp; *op = ToLinear8[*wp&mask]; wp++; op++)
378 n -= stride;
379 }
380 }
381 }
382 }
383
384
385 static void
386 horizontalAccumulate8abgr(uint16 *wp, int n, int stride, unsigned char *op,
387 unsigned char *ToLinear8)
388 {
389 register unsigned int cr, cg, cb, ca, mask;
390 register unsigned char t0, t1, t2, t3;
391
392 if (n >= stride) {
393 mask = CODE_MASK;
394 if (stride == 3) {
395 op[0] = 0;
396 t1 = ToLinear8[cb = wp[2]];
397 t2 = ToLinear8[cg = wp[1]];
398 t3 = ToLinear8[cr = wp[0]];
399 op[1] = t1;
400 op[2] = t2;
401 op[3] = t3;
402 n -= 3;
403 while (n > 0) {
404 n -= 3;
405 wp += 3;
406 op += 4;
407 op[0] = 0;
408 t1 = ToLinear8[(cb += wp[2]) & mask];
409 t2 = ToLinear8[(cg += wp[1]) & mask];
410 t3 = ToLinear8[(cr += wp[0]) & mask];
411 op[1] = t1;
412 op[2] = t2;
413 op[3] = t3;
414 }
415 } else if (stride == 4) {
416 t0 = ToLinear8[ca = wp[3]];
417 t1 = ToLinear8[cb = wp[2]];
418 t2 = ToLinear8[cg = wp[1]];
419 t3 = ToLinear8[cr = wp[0]];
420 op[0] = t0;
421 op[1] = t1;
422 op[2] = t2;
423 op[3] = t3;
424 n -= 4;
425 while (n > 0) {
426 n -= 4;
427 wp += 4;
428 op += 4;
429 t0 = ToLinear8[(ca += wp[3]) & mask];
430 t1 = ToLinear8[(cb += wp[2]) & mask];
431 t2 = ToLinear8[(cg += wp[1]) & mask];
432 t3 = ToLinear8[(cr += wp[0]) & mask];
433 op[0] = t0;
434 op[1] = t1;
435 op[2] = t2;
436 op[3] = t3;
437 }
438 } else {
439 REPEAT(stride, *op = ToLinear8[*wp&mask]; wp++; op++)
440 n -= stride;
441 while (n > 0) {
442 REPEAT(stride,
443 wp[stride] += *wp; *op = ToLinear8[*wp&mask]; wp++; op++)
444 n -= stride;
445 }
446 }
447 }
448 }
449
450 /*
451 * State block for each open TIFF
452 * file using PixarLog compression/decompression.
453 */
454 typedef struct {
455 TIFFPredictorState predict;
456 z_stream stream;
457 uint16 *tbuf;
458 uint16 stride;
459 int state;
460 int user_datafmt;
461 int quality;
462 #define PLSTATE_INIT 1
463
464 TIFFVSetMethod vgetparent; /* super-class method */
465 TIFFVSetMethod vsetparent; /* super-class method */
466
467 float *ToLinearF;
468 uint16 *ToLinear16;
469 unsigned char *ToLinear8;
470 uint16 *FromLT2;
471 uint16 *From14; /* Really for 16-bit data, but we shift down 2 */
472 uint16 *From8;
473
474 } PixarLogState;
475
476 static int
477 PixarLogMakeTables(PixarLogState *sp)
478 {
479
480 /*
481 * We make several tables here to convert between various external
482 * representations (float, 16-bit, and 8-bit) and the internal
483 * 11-bit companded representation. The 11-bit representation has two
484 * distinct regions. A linear bottom end up through .018316 in steps
485 * of about .000073, and a region of constant ratio up to about 25.
486 * These floating point numbers are stored in the main table ToLinearF.
487 * All other tables are derived from this one. The tables (and the
488 * ratios) are continuous at the internal seam.
489 */
490
491 int nlin, lt2size;
492 int i, j;
493 double b, c, linstep, v;
494 float *ToLinearF;
495 uint16 *ToLinear16;
496 unsigned char *ToLinear8;
497 uint16 *FromLT2;
498 uint16 *From14; /* Really for 16-bit data, but we shift down 2 */
499 uint16 *From8;
500
501 c = log(RATIO);
502 nlin = (int)(1./c); /* nlin must be an integer */
503 c = 1./nlin;
504 b = exp(-c*ONE); /* multiplicative scale factor [b*exp(c*ONE) = 1] */
505 linstep = b*c*exp(1.);
506
507 LogK1 = (float)(1./c); /* if (v >= 2) token = k1*log(v*k2) */
508 LogK2 = (float)(1./b);
509 lt2size = (int)(2./linstep) + 1;
510 FromLT2 = (uint16 *)_TIFFmalloc(lt2size*sizeof(uint16));
511 From14 = (uint16 *)_TIFFmalloc(16384*sizeof(uint16));
512 From8 = (uint16 *)_TIFFmalloc(256*sizeof(uint16));
513 ToLinearF = (float *)_TIFFmalloc(TSIZEP1 * sizeof(float));
514 ToLinear16 = (uint16 *)_TIFFmalloc(TSIZEP1 * sizeof(uint16));
515 ToLinear8 = (unsigned char *)_TIFFmalloc(TSIZEP1 * sizeof(unsigned char));
516 if (FromLT2 == NULL || From14 == NULL || From8 == NULL ||
517 ToLinearF == NULL || ToLinear16 == NULL || ToLinear8 == NULL) {
518 if (FromLT2) _TIFFfree(FromLT2);
519 if (From14) _TIFFfree(From14);
520 if (From8) _TIFFfree(From8);
521 if (ToLinearF) _TIFFfree(ToLinearF);
522 if (ToLinear16) _TIFFfree(ToLinear16);
523 if (ToLinear8) _TIFFfree(ToLinear8);
524 sp->FromLT2 = NULL;
525 sp->From14 = NULL;
526 sp->From8 = NULL;
527 sp->ToLinearF = NULL;
528 sp->ToLinear16 = NULL;
529 sp->ToLinear8 = NULL;
530 return 0;
531 }
532
533 j = 0;
534
535 for (i = 0; i < nlin; i++) {
536 v = i * linstep;
537 ToLinearF[j++] = (float)v;
538 }
539
540 for (i = nlin; i < TSIZE; i++)
541 ToLinearF[j++] = (float)(b*exp(c*i));
542
543 ToLinearF[2048] = ToLinearF[2047];
544
545 for (i = 0; i < TSIZEP1; i++) {
546 v = ToLinearF[i]*65535.0 + 0.5;
547 ToLinear16[i] = (v > 65535.0) ? 65535 : (uint16)v;
548 v = ToLinearF[i]*255.0 + 0.5;
549 ToLinear8[i] = (v > 255.0) ? 255 : (unsigned char)v;
550 }
551
552 j = 0;
553 for (i = 0; i < lt2size; i++) {
554 if ((i*linstep)*(i*linstep) > ToLinearF[j]*ToLinearF[j+1])
555 j++;
556 FromLT2[i] = j;
557 }
558
559 /*
560 * Since we lose info anyway on 16-bit data, we set up a 14-bit
561 * table and shift 16-bit values down two bits on input.
562 * saves a little table space.
563 */
564 j = 0;
565 for (i = 0; i < 16384; i++) {
566 while ((i/16383.)*(i/16383.) > ToLinearF[j]*ToLinearF[j+1])
567 j++;
568 From14[i] = j;
569 }
570
571 j = 0;
572 for (i = 0; i < 256; i++) {
573 while ((i/255.)*(i/255.) > ToLinearF[j]*ToLinearF[j+1])
574 j++;
575 From8[i] = j;
576 }
577
578 Fltsize = (float)(lt2size/2);
579
580 sp->ToLinearF = ToLinearF;
581 sp->ToLinear16 = ToLinear16;
582 sp->ToLinear8 = ToLinear8;
583 sp->FromLT2 = FromLT2;
584 sp->From14 = From14;
585 sp->From8 = From8;
586
587 return 1;
588 }
589
590 #define DecoderState(tif) ((PixarLogState*) (tif)->tif_data)
591 #define EncoderState(tif) ((PixarLogState*) (tif)->tif_data)
592
593 static int PixarLogEncode(TIFF*, tidata_t, tsize_t, tsample_t);
594 static int PixarLogDecode(TIFF*, tidata_t, tsize_t, tsample_t);
595
596 #define PIXARLOGDATAFMT_UNKNOWN -1
597
598 static int
599 PixarLogGuessDataFmt(TIFFDirectory *td)
600 {
601 int guess = PIXARLOGDATAFMT_UNKNOWN;
602 int format = td->td_sampleformat;
603
604 /* If the user didn't tell us his datafmt,
605 * take our best guess from the bitspersample.
606 */
607 switch (td->td_bitspersample) {
608 case 32:
609 if (format == SAMPLEFORMAT_IEEEFP)
610 guess = PIXARLOGDATAFMT_FLOAT;
611 break;
612 case 16:
613 if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT)
614 guess = PIXARLOGDATAFMT_16BIT;
615 break;
616 case 12:
617 if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_INT)
618 guess = PIXARLOGDATAFMT_12BITPICIO;
619 break;
620 case 11:
621 if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT)
622 guess = PIXARLOGDATAFMT_11BITLOG;
623 break;
624 case 8:
625 if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT)
626 guess = PIXARLOGDATAFMT_8BIT;
627 break;
628 }
629
630 return guess;
631 }
632
633 static uint32
634 multiply(size_t m1, size_t m2)
635 {
636 uint32 bytes = m1 * m2;
637
638 if (m1 && bytes / m1 != m2)
639 bytes = 0;
640
641 return bytes;
642 }
643
644 static int
645 PixarLogSetupDecode(TIFF* tif)
646 {
647 TIFFDirectory *td = &tif->tif_dir;
648 PixarLogState* sp = DecoderState(tif);
649 tsize_t tbuf_size;
650 static const char module[] = "PixarLogSetupDecode";
651
652 assert(sp != NULL);
653
654 /* Make sure no byte swapping happens on the data
655 * after decompression. */
656 tif->tif_postdecode = _TIFFNoPostDecode;
657
658 /* for some reason, we can't do this in TIFFInitPixarLog */
659
660 sp->stride = (td->td_planarconfig == PLANARCONFIG_CONTIG ?
661 td->td_samplesperpixel : 1);
662 tbuf_size = multiply(multiply(multiply(sp->stride, td->td_imagewidth),
663 td->td_rowsperstrip), sizeof(uint16));
664 if (tbuf_size == 0)
665 return (0);
666 sp->tbuf = (uint16 *) _TIFFmalloc(tbuf_size);
667 if (sp->tbuf == NULL)
668 return (0);
669 if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN)
670 sp->user_datafmt = PixarLogGuessDataFmt(td);
671 if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) {
672 TIFFErrorExt(tif->tif_clientdata, module,
673 "PixarLog compression can't handle bits depth/data format combination (depth: %d)",
674 td->td_bitspersample);
675 return (0);
676 }
677
678 if (inflateInit(&sp->stream) != Z_OK) {
679 TIFFErrorExt(tif->tif_clientdata, module, "%s: %s", tif->tif_name, sp->stream.msg);
680 return (0);
681 } else {
682 sp->state |= PLSTATE_INIT;
683 return (1);
684 }
685 }
686
687 /*
688 * Setup state for decoding a strip.
689 */
690 static int
691 PixarLogPreDecode(TIFF* tif, tsample_t s)
692 {
693 PixarLogState* sp = DecoderState(tif);
694
695 (void) s;
696 assert(sp != NULL);
697 sp->stream.next_in = tif->tif_rawdata;
698 sp->stream.avail_in = tif->tif_rawcc;
699 return (inflateReset(&sp->stream) == Z_OK);
700 }
701
702 static int
703 PixarLogDecode(TIFF* tif, tidata_t op, tsize_t occ, tsample_t s)
704 {
705 TIFFDirectory *td = &tif->tif_dir;
706 PixarLogState* sp = DecoderState(tif);
707 static const char module[] = "PixarLogDecode";
708 int i, nsamples, llen;
709 uint16 *up;
710
711 switch (sp->user_datafmt) {
712 case PIXARLOGDATAFMT_FLOAT:
713 nsamples = occ / sizeof(float); /* XXX float == 32 bits */
714 break;
715 case PIXARLOGDATAFMT_16BIT:
716 case PIXARLOGDATAFMT_12BITPICIO:
717 case PIXARLOGDATAFMT_11BITLOG:
718 nsamples = occ / sizeof(uint16); /* XXX uint16 == 16 bits */
719 break;
720 case PIXARLOGDATAFMT_8BIT:
721 case PIXARLOGDATAFMT_8BITABGR:
722 nsamples = occ;
723 break;
724 default:
725 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
726 "%d bit input not supported in PixarLog",
727 td->td_bitspersample);
728 return 0;
729 }
730
731 llen = sp->stride * td->td_imagewidth;
732
733 (void) s;
734 assert(sp != NULL);
735 sp->stream.next_out = (unsigned char *) sp->tbuf;
736 sp->stream.avail_out = nsamples * sizeof(uint16);
737 do {
738 int state = inflate(&sp->stream, Z_PARTIAL_FLUSH);
739 if (state == Z_STREAM_END) {
740 break; /* XXX */
741 }
742 if (state == Z_DATA_ERROR) {
743 TIFFErrorExt(tif->tif_clientdata, module,
744 "%s: Decoding error at scanline %d, %s",
745 tif->tif_name, tif->tif_row, sp->stream.msg);
746 if (inflateSync(&sp->stream) != Z_OK)
747 return (0);
748 continue;
749 }
750 if (state != Z_OK) {
751 TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s",
752 tif->tif_name, sp->stream.msg);
753 return (0);
754 }
755 } while (sp->stream.avail_out > 0);
756
757 /* hopefully, we got all the bytes we needed */
758 if (sp->stream.avail_out != 0) {
759 TIFFErrorExt(tif->tif_clientdata, module,
760 "%s: Not enough data at scanline %d (short %d bytes)",
761 tif->tif_name, tif->tif_row, sp->stream.avail_out);
762 return (0);
763 }
764
765 up = sp->tbuf;
766 /* Swap bytes in the data if from a different endian machine. */
767 if (tif->tif_flags & TIFF_SWAB)
768 TIFFSwabArrayOfShort(up, nsamples);
769
770 /*
771 * if llen is not an exact multiple of nsamples, the decode operation
772 * may overflow the output buffer, so truncate it enough to prevent
773 * that but still salvage as much data as possible.
774 */
775 if (nsamples % llen) {
776 TIFFWarningExt(tif->tif_clientdata, module,
777 "%s: stride %d is not a multiple of sample count, "
778 "%d, data truncated.", tif->tif_name, llen, nsamples);
779 nsamples -= nsamples % llen;
780 }
781
782 for (i = 0; i < nsamples; i += llen, up += llen) {
783 switch (sp->user_datafmt) {
784 case PIXARLOGDATAFMT_FLOAT:
785 horizontalAccumulateF(up, llen, sp->stride,
786 (float *)op, sp->ToLinearF);
787 op += llen * sizeof(float);
788 break;
789 case PIXARLOGDATAFMT_16BIT:
790 horizontalAccumulate16(up, llen, sp->stride,
791 (uint16 *)op, sp->ToLinear16);
792 op += llen * sizeof(uint16);
793 break;
794 case PIXARLOGDATAFMT_12BITPICIO:
795 horizontalAccumulate12(up, llen, sp->stride,
796 (int16 *)op, sp->ToLinearF);
797 op += llen * sizeof(int16);
798 break;
799 case PIXARLOGDATAFMT_11BITLOG:
800 horizontalAccumulate11(up, llen, sp->stride,
801 (uint16 *)op);
802 op += llen * sizeof(uint16);
803 break;
804 case PIXARLOGDATAFMT_8BIT:
805 horizontalAccumulate8(up, llen, sp->stride,
806 (unsigned char *)op, sp->ToLinear8);
807 op += llen * sizeof(unsigned char);
808 break;
809 case PIXARLOGDATAFMT_8BITABGR:
810 horizontalAccumulate8abgr(up, llen, sp->stride,
811 (unsigned char *)op, sp->ToLinear8);
812 op += llen * sizeof(unsigned char);
813 break;
814 default:
815 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
816 "PixarLogDecode: unsupported bits/sample: %d",
817 td->td_bitspersample);
818 return (0);
819 }
820 }
821
822 return (1);
823 }
824
825 static int
826 PixarLogSetupEncode(TIFF* tif)
827 {
828 TIFFDirectory *td = &tif->tif_dir;
829 PixarLogState* sp = EncoderState(tif);
830 tsize_t tbuf_size;
831 static const char module[] = "PixarLogSetupEncode";
832
833 assert(sp != NULL);
834
835 /* for some reason, we can't do this in TIFFInitPixarLog */
836
837 sp->stride = (td->td_planarconfig == PLANARCONFIG_CONTIG ?
838 td->td_samplesperpixel : 1);
839 tbuf_size = multiply(multiply(multiply(sp->stride, td->td_imagewidth),
840 td->td_rowsperstrip), sizeof(uint16));
841 if (tbuf_size == 0)
842 return (0);
843 sp->tbuf = (uint16 *) _TIFFmalloc(tbuf_size);
844 if (sp->tbuf == NULL)
845 return (0);
846 if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN)
847 sp->user_datafmt = PixarLogGuessDataFmt(td);
848 if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) {
849 TIFFErrorExt(tif->tif_clientdata, module, "PixarLog compression can't handle %d bit linear encodings", td->td_bitspersample);
850 return (0);
851 }
852
853 if (deflateInit(&sp->stream, sp->quality) != Z_OK) {
854 TIFFErrorExt(tif->tif_clientdata, module, "%s: %s", tif->tif_name, sp->stream.msg);
855 return (0);
856 } else {
857 sp->state |= PLSTATE_INIT;
858 return (1);
859 }
860 }
861
862 /*
863 * Reset encoding state at the start of a strip.
864 */
865 static int
866 PixarLogPreEncode(TIFF* tif, tsample_t s)
867 {
868 PixarLogState *sp = EncoderState(tif);
869
870 (void) s;
871 assert(sp != NULL);
872 sp->stream.next_out = tif->tif_rawdata;
873 sp->stream.avail_out = tif->tif_rawdatasize;
874 return (deflateReset(&sp->stream) == Z_OK);
875 }
876
877 static void
878 horizontalDifferenceF(float *ip, int n, int stride, uint16 *wp, uint16 *FromLT2)
879 {
880
881 int32 r1, g1, b1, a1, r2, g2, b2, a2, mask;
882 float fltsize = Fltsize;
883
884 #define CLAMP(v) ( (v<(float)0.) ? 0 \
885 : (v<(float)2.) ? FromLT2[(int)(v*fltsize)] \
886 : (v>(float)24.2) ? 2047 \
887 : LogK1*log(v*LogK2) + 0.5 )
888
889 mask = CODE_MASK;
890 if (n >= stride) {
891 if (stride == 3) {
892 r2 = wp[0] = (uint16) CLAMP(ip[0]);
893 g2 = wp[1] = (uint16) CLAMP(ip[1]);
894 b2 = wp[2] = (uint16) CLAMP(ip[2]);
895 n -= 3;
896 while (n > 0) {
897 n -= 3;
898 wp += 3;
899 ip += 3;
900 r1 = (int32) CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1;
901 g1 = (int32) CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1;
902 b1 = (int32) CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1;
903 }
904 } else if (stride == 4) {
905 r2 = wp[0] = (uint16) CLAMP(ip[0]);
906 g2 = wp[1] = (uint16) CLAMP(ip[1]);
907 b2 = wp[2] = (uint16) CLAMP(ip[2]);
908 a2 = wp[3] = (uint16) CLAMP(ip[3]);
909 n -= 4;
910 while (n > 0) {
911 n -= 4;
912 wp += 4;
913 ip += 4;
914 r1 = (int32) CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1;
915 g1 = (int32) CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1;
916 b1 = (int32) CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1;
917 a1 = (int32) CLAMP(ip[3]); wp[3] = (a1-a2) & mask; a2 = a1;
918 }
919 } else {
920 ip += n - 1; /* point to last one */
921 wp += n - 1; /* point to last one */
922 n -= stride;
923 while (n > 0) {
924 REPEAT(stride, wp[0] = (uint16) CLAMP(ip[0]);
925 wp[stride] -= wp[0];
926 wp[stride] &= mask;
927 wp--; ip--)
928 n -= stride;
929 }
930 REPEAT(stride, wp[0] = (uint16) CLAMP(ip[0]); wp--; ip--)
931 }
932 }
933 }
934
935 static void
936 horizontalDifference16(unsigned short *ip, int n, int stride,
937 unsigned short *wp, uint16 *From14)
938 {
939 register int r1, g1, b1, a1, r2, g2, b2, a2, mask;
940
941 /* assumption is unsigned pixel values */
942 #undef CLAMP
943 #define CLAMP(v) From14[(v) >> 2]
944
945 mask = CODE_MASK;
946 if (n >= stride) {
947 if (stride == 3) {
948 r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]);
949 b2 = wp[2] = CLAMP(ip[2]);
950 n -= 3;
951 while (n > 0) {
952 n -= 3;
953 wp += 3;
954 ip += 3;
955 r1 = CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1;
956 g1 = CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1;
957 b1 = CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1;
958 }
959 } else if (stride == 4) {
960 r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]);
961 b2 = wp[2] = CLAMP(ip[2]); a2 = wp[3] = CLAMP(ip[3]);
962 n -= 4;
963 while (n > 0) {
964 n -= 4;
965 wp += 4;
966 ip += 4;
967 r1 = CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1;
968 g1 = CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1;
969 b1 = CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1;
970 a1 = CLAMP(ip[3]); wp[3] = (a1-a2) & mask; a2 = a1;
971 }
972 } else {
973 ip += n - 1; /* point to last one */
974 wp += n - 1; /* point to last one */
975 n -= stride;
976 while (n > 0) {
977 REPEAT(stride, wp[0] = CLAMP(ip[0]);
978 wp[stride] -= wp[0];
979 wp[stride] &= mask;
980 wp--; ip--)
981 n -= stride;
982 }
983 REPEAT(stride, wp[0] = CLAMP(ip[0]); wp--; ip--)
984 }
985 }
986 }
987
988
989 static void
990 horizontalDifference8(unsigned char *ip, int n, int stride,
991 unsigned short *wp, uint16 *From8)
992 {
993 register int r1, g1, b1, a1, r2, g2, b2, a2, mask;
994
995 #undef CLAMP
996 #define CLAMP(v) (From8[(v)])
997
998 mask = CODE_MASK;
999 if (n >= stride) {
1000 if (stride == 3) {
1001 r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]);
1002 b2 = wp[2] = CLAMP(ip[2]);
1003 n -= 3;
1004 while (n > 0) {
1005 n -= 3;
1006 r1 = CLAMP(ip[3]); wp[3] = (r1-r2) & mask; r2 = r1;
1007 g1 = CLAMP(ip[4]); wp[4] = (g1-g2) & mask; g2 = g1;
1008 b1 = CLAMP(ip[5]); wp[5] = (b1-b2) & mask; b2 = b1;
1009 wp += 3;
1010 ip += 3;
1011 }
1012 } else if (stride == 4) {
1013 r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]);
1014 b2 = wp[2] = CLAMP(ip[2]); a2 = wp[3] = CLAMP(ip[3]);
1015 n -= 4;
1016 while (n > 0) {
1017 n -= 4;
1018 r1 = CLAMP(ip[4]); wp[4] = (r1-r2) & mask; r2 = r1;
1019 g1 = CLAMP(ip[5]); wp[5] = (g1-g2) & mask; g2 = g1;
1020 b1 = CLAMP(ip[6]); wp[6] = (b1-b2) & mask; b2 = b1;
1021 a1 = CLAMP(ip[7]); wp[7] = (a1-a2) & mask; a2 = a1;
1022 wp += 4;
1023 ip += 4;
1024 }
1025 } else {
1026 wp += n + stride - 1; /* point to last one */
1027 ip += n + stride - 1; /* point to last one */
1028 n -= stride;
1029 while (n > 0) {
1030 REPEAT(stride, wp[0] = CLAMP(ip[0]);
1031 wp[stride] -= wp[0];
1032 wp[stride] &= mask;
1033 wp--; ip--)
1034 n -= stride;
1035 }
1036 REPEAT(stride, wp[0] = CLAMP(ip[0]); wp--; ip--)
1037 }
1038 }
1039 }
1040
1041 /*
1042 * Encode a chunk of pixels.
1043 */
1044 static int
1045 PixarLogEncode(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s)
1046 {
1047 TIFFDirectory *td = &tif->tif_dir;
1048 PixarLogState *sp = EncoderState(tif);
1049 static const char module[] = "PixarLogEncode";
1050 int i, n, llen;
1051 unsigned short * up;
1052
1053 (void) s;
1054
1055 switch (sp->user_datafmt) {
1056 case PIXARLOGDATAFMT_FLOAT:
1057 n = cc / sizeof(float); /* XXX float == 32 bits */
1058 break;
1059 case PIXARLOGDATAFMT_16BIT:
1060 case PIXARLOGDATAFMT_12BITPICIO:
1061 case PIXARLOGDATAFMT_11BITLOG:
1062 n = cc / sizeof(uint16); /* XXX uint16 == 16 bits */
1063 break;
1064 case PIXARLOGDATAFMT_8BIT:
1065 case PIXARLOGDATAFMT_8BITABGR:
1066 n = cc;
1067 break;
1068 default:
1069 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
1070 "%d bit input not supported in PixarLog",
1071 td->td_bitspersample);
1072 return 0;
1073 }
1074
1075 llen = sp->stride * td->td_imagewidth;
1076
1077 for (i = 0, up = sp->tbuf; i < n; i += llen, up += llen) {
1078 switch (sp->user_datafmt) {
1079 case PIXARLOGDATAFMT_FLOAT:
1080 horizontalDifferenceF((float *)bp, llen,
1081 sp->stride, up, sp->FromLT2);
1082 bp += llen * sizeof(float);
1083 break;
1084 case PIXARLOGDATAFMT_16BIT:
1085 horizontalDifference16((uint16 *)bp, llen,
1086 sp->stride, up, sp->From14);
1087 bp += llen * sizeof(uint16);
1088 break;
1089 case PIXARLOGDATAFMT_8BIT:
1090 horizontalDifference8((unsigned char *)bp, llen,
1091 sp->stride, up, sp->From8);
1092 bp += llen * sizeof(unsigned char);
1093 break;
1094 default:
1095 TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
1096 "%d bit input not supported in PixarLog",
1097 td->td_bitspersample);
1098 return 0;
1099 }
1100 }
1101
1102 sp->stream.next_in = (unsigned char *) sp->tbuf;
1103 sp->stream.avail_in = n * sizeof(uint16);
1104
1105 do {
1106 if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK) {
1107 TIFFErrorExt(tif->tif_clientdata, module, "%s: Encoder error: %s",
1108 tif->tif_name, sp->stream.msg);
1109 return (0);
1110 }
1111 if (sp->stream.avail_out == 0) {
1112 tif->tif_rawcc = tif->tif_rawdatasize;
1113 TIFFFlushData1(tif);
1114 sp->stream.next_out = tif->tif_rawdata;
1115 sp->stream.avail_out = tif->tif_rawdatasize;
1116 }
1117 } while (sp->stream.avail_in > 0);
1118 return (1);
1119 }
1120
1121 /*
1122 * Finish off an encoded strip by flushing the last
1123 * string and tacking on an End Of Information code.
1124 */
1125
1126 static int
1127 PixarLogPostEncode(TIFF* tif)
1128 {
1129 PixarLogState *sp = EncoderState(tif);
1130 static const char module[] = "PixarLogPostEncode";
1131 int state;
1132
1133 sp->stream.avail_in = 0;
1134
1135 do {
1136 state = deflate(&sp->stream, Z_FINISH);
1137 switch (state) {
1138 case Z_STREAM_END:
1139 case Z_OK:
1140 if (sp->stream.avail_out != (uint32)tif->tif_rawdatasize) {
1141 tif->tif_rawcc =
1142 tif->tif_rawdatasize - sp->stream.avail_out;
1143 TIFFFlushData1(tif);
1144 sp->stream.next_out = tif->tif_rawdata;
1145 sp->stream.avail_out = tif->tif_rawdatasize;
1146 }
1147 break;
1148 default:
1149 TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s",
1150 tif->tif_name, sp->stream.msg);
1151 return (0);
1152 }
1153 } while (state != Z_STREAM_END);
1154 return (1);
1155 }
1156
1157 static void
1158 PixarLogClose(TIFF* tif)
1159 {
1160 TIFFDirectory *td = &tif->tif_dir;
1161
1162 /* In a really sneaky maneuver, on close, we covertly modify both
1163 * bitspersample and sampleformat in the directory to indicate
1164 * 8-bit linear. This way, the decode "just works" even for
1165 * readers that don't know about PixarLog, or how to set
1166 * the PIXARLOGDATFMT pseudo-tag.
1167 */
1168 td->td_bitspersample = 8;
1169 td->td_sampleformat = SAMPLEFORMAT_UINT;
1170 }
1171
1172 static void
1173 PixarLogCleanup(TIFF* tif)
1174 {
1175 PixarLogState* sp = (PixarLogState*) tif->tif_data;
1176
1177 assert(sp != 0);
1178
1179 (void)TIFFPredictorCleanup(tif);
1180
1181 tif->tif_tagmethods.vgetfield = sp->vgetparent;
1182 tif->tif_tagmethods.vsetfield = sp->vsetparent;
1183
1184 if (sp->FromLT2) _TIFFfree(sp->FromLT2);
1185 if (sp->From14) _TIFFfree(sp->From14);
1186 if (sp->From8) _TIFFfree(sp->From8);
1187 if (sp->ToLinearF) _TIFFfree(sp->ToLinearF);
1188 if (sp->ToLinear16) _TIFFfree(sp->ToLinear16);
1189 if (sp->ToLinear8) _TIFFfree(sp->ToLinear8);
1190 if (sp->state&PLSTATE_INIT) {
1191 if (tif->tif_mode == O_RDONLY)
1192 inflateEnd(&sp->stream);
1193 else
1194 deflateEnd(&sp->stream);
1195 }
1196 if (sp->tbuf)
1197 _TIFFfree(sp->tbuf);
1198 _TIFFfree(sp);
1199 tif->tif_data = NULL;
1200
1201 _TIFFSetDefaultCompressionState(tif);
1202 }
1203
1204 static int
1205 PixarLogVSetField(TIFF* tif, ttag_t tag, va_list ap)
1206 {
1207 PixarLogState *sp = (PixarLogState *)tif->tif_data;
1208 int result;
1209 static const char module[] = "PixarLogVSetField";
1210
1211 switch (tag) {
1212 case TIFFTAG_PIXARLOGQUALITY:
1213 sp->quality = va_arg(ap, int);
1214 if (tif->tif_mode != O_RDONLY && (sp->state&PLSTATE_INIT)) {
1215 if (deflateParams(&sp->stream,
1216 sp->quality, Z_DEFAULT_STRATEGY) != Z_OK) {
1217 TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s",
1218 tif->tif_name, sp->stream.msg);
1219 return (0);
1220 }
1221 }
1222 return (1);
1223 case TIFFTAG_PIXARLOGDATAFMT:
1224 sp->user_datafmt = va_arg(ap, int);
1225 /* Tweak the TIFF header so that the rest of libtiff knows what
1226 * size of data will be passed between app and library, and
1227 * assume that the app knows what it is doing and is not
1228 * confused by these header manipulations...
1229 */
1230 switch (sp->user_datafmt) {
1231 case PIXARLOGDATAFMT_8BIT:
1232 case PIXARLOGDATAFMT_8BITABGR:
1233 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
1234 TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
1235 break;
1236 case PIXARLOGDATAFMT_11BITLOG:
1237 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16);
1238 TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
1239 break;
1240 case PIXARLOGDATAFMT_12BITPICIO:
1241 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16);
1242 TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_INT);
1243 break;
1244 case PIXARLOGDATAFMT_16BIT:
1245 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16);
1246 TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
1247 break;
1248 case PIXARLOGDATAFMT_FLOAT:
1249 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 32);
1250 TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP);
1251 break;
1252 }
1253 /*
1254 * Must recalculate sizes should bits/sample change.
1255 */
1256 tif->tif_tilesize = isTiled(tif) ? TIFFTileSize(tif) : (tsize_t) -1;
1257 tif->tif_scanlinesize = TIFFScanlineSize(tif);
1258 result = 1; /* NB: pseudo tag */
1259 break;
1260 default:
1261 result = (*sp->vsetparent)(tif, tag, ap);
1262 }
1263 return (result);
1264 }
1265
1266 static int
1267 PixarLogVGetField(TIFF* tif, ttag_t tag, va_list ap)
1268 {
1269 PixarLogState *sp = (PixarLogState *)tif->tif_data;
1270
1271 switch (tag) {
1272 case TIFFTAG_PIXARLOGQUALITY:
1273 *va_arg(ap, int*) = sp->quality;
1274 break;
1275 case TIFFTAG_PIXARLOGDATAFMT:
1276 *va_arg(ap, int*) = sp->user_datafmt;
1277 break;
1278 default:
1279 return (*sp->vgetparent)(tif, tag, ap);
1280 }
1281 return (1);
1282 }
1283
1284 static const TIFFFieldInfo pixarlogFieldInfo[] = {
1285 {TIFFTAG_PIXARLOGDATAFMT,0,0,TIFF_ANY, FIELD_PSEUDO,FALSE,FALSE,""},
1286 {TIFFTAG_PIXARLOGQUALITY,0,0,TIFF_ANY, FIELD_PSEUDO,FALSE,FALSE,""}
1287 };
1288
1289 int
1290 TIFFInitPixarLog(TIFF* tif, int scheme)
1291 {
1292 static const char module[] = "TIFFInitPixarLog";
1293
1294 PixarLogState* sp;
1295
1296 assert(scheme == COMPRESSION_PIXARLOG);
1297
1298 /*
1299 * Merge codec-specific tag information.
1300 */
1301 if (!_TIFFMergeFieldInfo(tif, pixarlogFieldInfo,
1302 TIFFArrayCount(pixarlogFieldInfo))) {
1303 TIFFErrorExt(tif->tif_clientdata, module,
1304 "Merging PixarLog codec-specific tags failed");
1305 return 0;
1306 }
1307
1308 /*
1309 * Allocate state block so tag methods have storage to record values.
1310 */
1311 tif->tif_data = (tidata_t) _TIFFmalloc(sizeof (PixarLogState));
1312 if (tif->tif_data == NULL)
1313 goto bad;
1314 sp = (PixarLogState*) tif->tif_data;
1315 _TIFFmemset(sp, 0, sizeof (*sp));
1316 sp->stream.data_type = Z_BINARY;
1317 sp->user_datafmt = PIXARLOGDATAFMT_UNKNOWN;
1318
1319 /*
1320 * Install codec methods.
1321 */
1322 tif->tif_setupdecode = PixarLogSetupDecode;
1323 tif->tif_predecode = PixarLogPreDecode;
1324 tif->tif_decoderow = PixarLogDecode;
1325 tif->tif_decodestrip = PixarLogDecode;
1326 tif->tif_decodetile = PixarLogDecode;
1327 tif->tif_setupencode = PixarLogSetupEncode;
1328 tif->tif_preencode = PixarLogPreEncode;
1329 tif->tif_postencode = PixarLogPostEncode;
1330 tif->tif_encoderow = PixarLogEncode;
1331 tif->tif_encodestrip = PixarLogEncode;
1332 tif->tif_encodetile = PixarLogEncode;
1333 tif->tif_close = PixarLogClose;
1334 tif->tif_cleanup = PixarLogCleanup;
1335
1336 /* Override SetField so we can handle our private pseudo-tag */
1337 sp->vgetparent = tif->tif_tagmethods.vgetfield;
1338 tif->tif_tagmethods.vgetfield = PixarLogVGetField; /* hook for codec tags */
1339 sp->vsetparent = tif->tif_tagmethods.vsetfield;
1340 tif->tif_tagmethods.vsetfield = PixarLogVSetField; /* hook for codec tags */
1341
1342 /* Default values for codec-specific fields */
1343 sp->quality = Z_DEFAULT_COMPRESSION; /* default comp. level */
1344 sp->state = 0;
1345
1346 /* we don't wish to use the predictor,
1347 * the default is none, which predictor value 1
1348 */
1349 (void) TIFFPredictorInit(tif);
1350
1351 /*
1352 * build the companding tables
1353 */
1354 PixarLogMakeTables(sp);
1355
1356 return (1);
1357 bad:
1358 TIFFErrorExt(tif->tif_clientdata, module,
1359 "No space for PixarLog state block");
1360 return (0);
1361 }
1362 #endif /* PIXARLOG_SUPPORT */
1363
1364 /* vim: set ts=8 sts=8 sw=8 noet: */
1365 /*
1366 * Local Variables:
1367 * mode: c
1368 * c-basic-offset: 8
1369 * fill-column: 78
1370 * End:
1371 */
tsize_t
int32 tsize_t
Definition: tiffio.h:67
PIXARLOGDATAFMT_16BIT
#define PIXARLOGDATAFMT_16BIT
Definition: tiff.h:547
tsample_t
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Definition: tiffio.h:63
ttag_t
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Definition: tiffio.h:61
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Definition: tiffiop.h:159
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Definition: tiffiop.h:197
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Definition: tif_dir.h:41
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Definition: tif_pixarlog.c:469
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Definition: deflate.c:353
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Definition: tiffio.h:327
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Definition: tiffiop.h:170
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inflateEnd
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Definition: inflate.c:1238
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Definition: tiff.h:546
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Definition: zlib.h:85
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Definition: tiff.h:243
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Definition: tiffiop.h:153