1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation. Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 // This file is available under and governed by the GNU General Public
26 // License version 2 only, as published by the Free Software Foundation.
27 // However, the following notice accompanied the original version of this
28 // file:
29 //
30 //---------------------------------------------------------------------------------
31 //
32 // Little Color Management System
33 // Copyright (c) 1998-2012 Marti Maria Saguer
34 //
35 // Permission is hereby granted, free of charge, to any person obtaining
36 // a copy of this software and associated documentation files (the "Software"),
37 // to deal in the Software without restriction, including without limitation
38 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
39 // and/or sell copies of the Software, and to permit persons to whom the Software
40 // is furnished to do so, subject to the following conditions:
41 //
42 // The above copyright notice and this permission notice shall be included in
43 // all copies or substantial portions of the Software.
44 //
45 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
46 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
47 // THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
48 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
49 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
50 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
51 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
52 //
53 //---------------------------------------------------------------------------------
54 //
55
56 #include "lcms2_internal.h"
57
58
59 // Allocates an empty multi profile element
60 cmsStage* CMSEXPORT _cmsStageAllocPlaceholder(cmsContext ContextID,
61 cmsStageSignature Type,
62 cmsUInt32Number InputChannels,
63 cmsUInt32Number OutputChannels,
64 _cmsStageEvalFn EvalPtr,
65 _cmsStageDupElemFn DupElemPtr,
66 _cmsStageFreeElemFn FreePtr,
67 void* Data)
68 {
69 cmsStage* ph = (cmsStage*) _cmsMallocZero(ContextID, sizeof(cmsStage));
70
71 if (ph == NULL) return NULL;
72
73
74 ph ->ContextID = ContextID;
75
76 ph ->Type = Type;
77 ph ->Implements = Type; // By default, no clue on what is implementing
78
79 ph ->InputChannels = InputChannels;
80 ph ->OutputChannels = OutputChannels;
81 ph ->EvalPtr = EvalPtr;
82 ph ->DupElemPtr = DupElemPtr;
83 ph ->FreePtr = FreePtr;
84 ph ->Data = Data;
85
86 return ph;
87 }
88
89
90 static
91 void EvaluateIdentity(const cmsFloat32Number In[],
92 cmsFloat32Number Out[],
93 const cmsStage *mpe)
94 {
95 memmove(Out, In, mpe ->InputChannels * sizeof(cmsFloat32Number));
96 }
97
98
99 cmsStage* CMSEXPORT cmsStageAllocIdentity(cmsContext ContextID, cmsUInt32Number nChannels)
100 {
101 return _cmsStageAllocPlaceholder(ContextID,
102 cmsSigIdentityElemType,
103 nChannels, nChannels,
104 EvaluateIdentity,
105 NULL,
106 NULL,
107 NULL);
108 }
109
110 // Conversion functions. From floating point to 16 bits
111 static
112 void FromFloatTo16(const cmsFloat32Number In[], cmsUInt16Number Out[], cmsUInt32Number n)
113 {
114 cmsUInt32Number i;
115
116 for (i=0; i < n; i++) {
117 Out[i] = _cmsQuickSaturateWord(In[i] * 65535.0);
118 }
119 }
120
121 // From 16 bits to floating point
122 static
123 void From16ToFloat(const cmsUInt16Number In[], cmsFloat32Number Out[], cmsUInt32Number n)
124 {
125 cmsUInt32Number i;
126
127 for (i=0; i < n; i++) {
128 Out[i] = (cmsFloat32Number) In[i] / 65535.0F;
129 }
130 }
131
132
133 // This function is quite useful to analyze the structure of a LUT and retrieve the MPE elements
134 // that conform the LUT. It should be called with the LUT, the number of expected elements and
135 // then a list of expected types followed with a list of cmsFloat64Number pointers to MPE elements. If
136 // the function founds a match with current pipeline, it fills the pointers and returns TRUE
137 // if not, returns FALSE without touching anything. Setting pointers to NULL does bypass
138 // the storage process.
139 cmsBool CMSEXPORT cmsPipelineCheckAndRetreiveStages(const cmsPipeline* Lut, cmsUInt32Number n, ...)
140 {
141 va_list args;
142 cmsUInt32Number i;
143 cmsStage* mpe;
144 cmsStageSignature Type;
145 void** ElemPtr;
146
147 // Make sure same number of elements
148 if (cmsPipelineStageCount(Lut) != n) return FALSE;
149
150 va_start(args, n);
151
152 // Iterate across asked types
153 mpe = Lut ->Elements;
154 for (i=0; i < n; i++) {
155
156 // Get asked type
157 Type = (cmsStageSignature)va_arg(args, cmsStageSignature);
158 if (mpe ->Type != Type) {
159
160 va_end(args); // Mismatch. We are done.
161 return FALSE;
162 }
163 mpe = mpe ->Next;
164 }
165
166 // Found a combination, fill pointers if not NULL
167 mpe = Lut ->Elements;
168 for (i=0; i < n; i++) {
169
170 ElemPtr = va_arg(args, void**);
171 if (ElemPtr != NULL)
172 *ElemPtr = mpe;
173
174 mpe = mpe ->Next;
175 }
176
177 va_end(args);
178 return TRUE;
179 }
180
181 // Below there are implementations for several types of elements. Each type may be implemented by a
182 // evaluation function, a duplication function, a function to free resources and a constructor.
183
184 // *************************************************************************************************
185 // Type cmsSigCurveSetElemType (curves)
186 // *************************************************************************************************
187
188 cmsToneCurve** _cmsStageGetPtrToCurveSet(const cmsStage* mpe)
189 {
190 _cmsStageToneCurvesData* Data = (_cmsStageToneCurvesData*) mpe ->Data;
191
192 return Data ->TheCurves;
193 }
194
195 static
196 void EvaluateCurves(const cmsFloat32Number In[],
197 cmsFloat32Number Out[],
198 const cmsStage *mpe)
199 {
200 _cmsStageToneCurvesData* Data;
201 cmsUInt32Number i;
202
203 _cmsAssert(mpe != NULL);
204
205 Data = (_cmsStageToneCurvesData*) mpe ->Data;
206 if (Data == NULL) return;
207
208 if (Data ->TheCurves == NULL) return;
209
210 for (i=0; i < Data ->nCurves; i++) {
211 Out[i] = cmsEvalToneCurveFloat(Data ->TheCurves[i], In[i]);
212 }
213 }
214
215 static
216 void CurveSetElemTypeFree(cmsStage* mpe)
217 {
218 _cmsStageToneCurvesData* Data;
219 cmsUInt32Number i;
220
221 _cmsAssert(mpe != NULL);
222
223 Data = (_cmsStageToneCurvesData*) mpe ->Data;
224 if (Data == NULL) return;
225
226 if (Data ->TheCurves != NULL) {
227 for (i=0; i < Data ->nCurves; i++) {
228 if (Data ->TheCurves[i] != NULL)
229 cmsFreeToneCurve(Data ->TheCurves[i]);
230 }
231 }
232 _cmsFree(mpe ->ContextID, Data ->TheCurves);
233 _cmsFree(mpe ->ContextID, Data);
234 }
235
236
237 static
238 void* CurveSetDup(cmsStage* mpe)
239 {
240 _cmsStageToneCurvesData* Data = (_cmsStageToneCurvesData*) mpe ->Data;
241 _cmsStageToneCurvesData* NewElem;
242 cmsUInt32Number i;
243
244 NewElem = (_cmsStageToneCurvesData*) _cmsMallocZero(mpe ->ContextID, sizeof(_cmsStageToneCurvesData));
245 if (NewElem == NULL) return NULL;
246
247 NewElem ->nCurves = Data ->nCurves;
248 NewElem ->TheCurves = (cmsToneCurve**) _cmsCalloc(mpe ->ContextID, NewElem ->nCurves, sizeof(cmsToneCurve*));
249
250 if (NewElem ->TheCurves == NULL) goto Error;
251
252 for (i=0; i < NewElem ->nCurves; i++) {
253
254 // Duplicate each curve. It may fail.
255 NewElem ->TheCurves[i] = cmsDupToneCurve(Data ->TheCurves[i]);
256 if (NewElem ->TheCurves[i] == NULL) goto Error;
257
258
259 }
260 return (void*) NewElem;
261
262 Error:
263
264 if (NewElem ->TheCurves != NULL) {
265 for (i=0; i < NewElem ->nCurves; i++) {
266 if (NewElem ->TheCurves[i])
267 cmsFreeToneCurve(NewElem ->TheCurves[i]);
268 }
269 }
270 _cmsFree(mpe ->ContextID, NewElem ->TheCurves);
271 _cmsFree(mpe ->ContextID, NewElem);
272 return NULL;
273 }
274
275
276 // Curves == NULL forces identity curves
277 cmsStage* CMSEXPORT cmsStageAllocToneCurves(cmsContext ContextID, cmsUInt32Number nChannels, cmsToneCurve* const Curves[])
278 {
279 cmsUInt32Number i;
280 _cmsStageToneCurvesData* NewElem;
281 cmsStage* NewMPE;
282
283
284 NewMPE = _cmsStageAllocPlaceholder(ContextID, cmsSigCurveSetElemType, nChannels, nChannels,
285 EvaluateCurves, CurveSetDup, CurveSetElemTypeFree, NULL );
286 if (NewMPE == NULL) return NULL;
287
288 NewElem = (_cmsStageToneCurvesData*) _cmsMallocZero(ContextID, sizeof(_cmsStageToneCurvesData));
289 if (NewElem == NULL) {
290 cmsStageFree(NewMPE);
291 return NULL;
292 }
293
294 NewMPE ->Data = (void*) NewElem;
295
296 NewElem ->nCurves = nChannels;
297 NewElem ->TheCurves = (cmsToneCurve**) _cmsCalloc(ContextID, nChannels, sizeof(cmsToneCurve*));
298 if (NewElem ->TheCurves == NULL) {
299 cmsStageFree(NewMPE);
300 return NULL;
301 }
302
303 for (i=0; i < nChannels; i++) {
304
305 if (Curves == NULL) {
306 NewElem ->TheCurves[i] = cmsBuildGamma(ContextID, 1.0);
307 }
308 else {
309 NewElem ->TheCurves[i] = cmsDupToneCurve(Curves[i]);
310 }
311
312 if (NewElem ->TheCurves[i] == NULL) {
313 cmsStageFree(NewMPE);
314 return NULL;
315 }
316
317 }
318
319 return NewMPE;
320 }
321
322
323 // Create a bunch of identity curves
324 cmsStage* _cmsStageAllocIdentityCurves(cmsContext ContextID, int nChannels)
325 {
326 cmsStage* mpe = cmsStageAllocToneCurves(ContextID, nChannels, NULL);
327
328 if (mpe == NULL) return NULL;
329 mpe ->Implements = cmsSigIdentityElemType;
330 return mpe;
331 }
332
333
334 // *************************************************************************************************
335 // Type cmsSigMatrixElemType (Matrices)
336 // *************************************************************************************************
337
338
339 // Special care should be taken here because precision loss. A temporary cmsFloat64Number buffer is being used
340 static
341 void EvaluateMatrix(const cmsFloat32Number In[],
342 cmsFloat32Number Out[],
343 const cmsStage *mpe)
344 {
345 cmsUInt32Number i, j;
346 _cmsStageMatrixData* Data = (_cmsStageMatrixData*) mpe ->Data;
347 cmsFloat64Number Tmp;
348
349 // Input is already in 0..1.0 notation
350 for (i=0; i < mpe ->OutputChannels; i++) {
351
352 Tmp = 0;
353 for (j=0; j < mpe->InputChannels; j++) {
354 Tmp += In[j] * Data->Double[i*mpe->InputChannels + j];
355 }
356
357 if (Data ->Offset != NULL)
358 Tmp += Data->Offset[i];
359
360 Out[i] = (cmsFloat32Number) Tmp;
361 }
362
363
364 // Output in 0..1.0 domain
365 }
366
367
368 // Duplicate a yet-existing matrix element
369 static
370 void* MatrixElemDup(cmsStage* mpe)
371 {
372 _cmsStageMatrixData* Data = (_cmsStageMatrixData*) mpe ->Data;
373 _cmsStageMatrixData* NewElem;
374 cmsUInt32Number sz;
375
376 NewElem = (_cmsStageMatrixData*) _cmsMallocZero(mpe ->ContextID, sizeof(_cmsStageMatrixData));
377 if (NewElem == NULL) return NULL;
378
379 sz = mpe ->InputChannels * mpe ->OutputChannels;
380
381 NewElem ->Double = (cmsFloat64Number*) _cmsDupMem(mpe ->ContextID, Data ->Double, sz * sizeof(cmsFloat64Number)) ;
382
383 if (Data ->Offset)
384 NewElem ->Offset = (cmsFloat64Number*) _cmsDupMem(mpe ->ContextID,
385 Data ->Offset, mpe -> OutputChannels * sizeof(cmsFloat64Number)) ;
386
387 return (void*) NewElem;
388 }
389
390
391 static
392 void MatrixElemTypeFree(cmsStage* mpe)
393 {
394 _cmsStageMatrixData* Data = (_cmsStageMatrixData*) mpe ->Data;
395 if (Data == NULL)
396 return;
397 if (Data ->Double)
398 _cmsFree(mpe ->ContextID, Data ->Double);
399
400 if (Data ->Offset)
401 _cmsFree(mpe ->ContextID, Data ->Offset);
402
403 _cmsFree(mpe ->ContextID, mpe ->Data);
404 }
405
406
407
408 cmsStage* CMSEXPORT cmsStageAllocMatrix(cmsContext ContextID, cmsUInt32Number Rows, cmsUInt32Number Cols,
409 const cmsFloat64Number* Matrix, const cmsFloat64Number* Offset)
410 {
411 cmsUInt32Number i, n;
412 _cmsStageMatrixData* NewElem;
413 cmsStage* NewMPE;
414
415 n = Rows * Cols;
416
417 // Check for overflow
418 if (n == 0) return NULL;
419 if (n >= UINT_MAX / Cols) return NULL;
420 if (n >= UINT_MAX / Rows) return NULL;
421 if (n < Rows || n < Cols) return NULL;
422
423 NewMPE = _cmsStageAllocPlaceholder(ContextID, cmsSigMatrixElemType, Cols, Rows,
424 EvaluateMatrix, MatrixElemDup, MatrixElemTypeFree, NULL );
425 if (NewMPE == NULL) return NULL;
426
427
428 NewElem = (_cmsStageMatrixData*) _cmsMallocZero(ContextID, sizeof(_cmsStageMatrixData));
429 if (NewElem == NULL) return NULL;
430
431
432 NewElem ->Double = (cmsFloat64Number*) _cmsCalloc(ContextID, n, sizeof(cmsFloat64Number));
433
434 if (NewElem->Double == NULL) {
435 MatrixElemTypeFree(NewMPE);
436 return NULL;
437 }
438
439 for (i=0; i < n; i++) {
440 NewElem ->Double[i] = Matrix[i];
441 }
442
443
444 if (Offset != NULL) {
445
446 NewElem ->Offset = (cmsFloat64Number*) _cmsCalloc(ContextID, Cols, sizeof(cmsFloat64Number));
447 if (NewElem->Offset == NULL) {
448 MatrixElemTypeFree(NewMPE);
449 return NULL;
450 }
451
452 for (i=0; i < Cols; i++) {
453 NewElem ->Offset[i] = Offset[i];
454 }
455
456 }
457
458 NewMPE ->Data = (void*) NewElem;
459 return NewMPE;
460 }
461
462
463 // *************************************************************************************************
464 // Type cmsSigCLutElemType
465 // *************************************************************************************************
466
467
468 // Evaluate in true floating point
469 static
470 void EvaluateCLUTfloat(const cmsFloat32Number In[], cmsFloat32Number Out[], const cmsStage *mpe)
471 {
472 _cmsStageCLutData* Data = (_cmsStageCLutData*) mpe ->Data;
473
474 Data -> Params ->Interpolation.LerpFloat(In, Out, Data->Params);
475 }
476
477
478 // Convert to 16 bits, evaluate, and back to floating point
479 static
480 void EvaluateCLUTfloatIn16(const cmsFloat32Number In[], cmsFloat32Number Out[], const cmsStage *mpe)
481 {
482 _cmsStageCLutData* Data = (_cmsStageCLutData*) mpe ->Data;
483 cmsUInt16Number In16[MAX_STAGE_CHANNELS], Out16[MAX_STAGE_CHANNELS];
484
485 _cmsAssert(mpe ->InputChannels <= MAX_STAGE_CHANNELS);
486 _cmsAssert(mpe ->OutputChannels <= MAX_STAGE_CHANNELS);
487
488 FromFloatTo16(In, In16, mpe ->InputChannels);
489 Data -> Params ->Interpolation.Lerp16(In16, Out16, Data->Params);
490 From16ToFloat(Out16, Out, mpe ->OutputChannels);
491 }
492
493
494 // Given an hypercube of b dimensions, with Dims[] number of nodes by dimension, calculate the total amount of nodes
495 static
496 cmsUInt32Number CubeSize(const cmsUInt32Number Dims[], cmsUInt32Number b)
497 {
498 cmsUInt32Number rv, dim;
499
500 _cmsAssert(Dims != NULL);
501
502 for (rv = 1; b > 0; b--) {
503
504 dim = Dims[b-1];
505 if (dim == 0) return 0; // Error
506
507 rv *= dim;
508
509 // Check for overflow
510 if (rv > UINT_MAX / dim) return 0;
511 }
512
513 return rv;
514 }
515
516 static
517 void* CLUTElemDup(cmsStage* mpe)
518 {
519 _cmsStageCLutData* Data = (_cmsStageCLutData*) mpe ->Data;
520 _cmsStageCLutData* NewElem;
521
522
523 NewElem = (_cmsStageCLutData*) _cmsMallocZero(mpe ->ContextID, sizeof(_cmsStageCLutData));
524 if (NewElem == NULL) return NULL;
525
526 NewElem ->nEntries = Data ->nEntries;
527 NewElem ->HasFloatValues = Data ->HasFloatValues;
528
529 if (Data ->Tab.T) {
530
531 if (Data ->HasFloatValues) {
532 NewElem ->Tab.TFloat = (cmsFloat32Number*) _cmsDupMem(mpe ->ContextID, Data ->Tab.TFloat, Data ->nEntries * sizeof (cmsFloat32Number));
533 if (NewElem ->Tab.TFloat == NULL)
534 goto Error;
535 } else {
536 NewElem ->Tab.T = (cmsUInt16Number*) _cmsDupMem(mpe ->ContextID, Data ->Tab.T, Data ->nEntries * sizeof (cmsUInt16Number));
537 if (NewElem ->Tab.TFloat == NULL)
538 goto Error;
539 }
540 }
541
542 NewElem ->Params = _cmsComputeInterpParamsEx(mpe ->ContextID,
543 Data ->Params ->nSamples,
544 Data ->Params ->nInputs,
545 Data ->Params ->nOutputs,
546 NewElem ->Tab.T,
547 Data ->Params ->dwFlags);
548 if (NewElem->Params != NULL)
549 return (void*) NewElem;
550 Error:
551 if (NewElem->Tab.T)
552 // This works for both types
553 _cmsFree(mpe ->ContextID, NewElem -> Tab.T);
554 _cmsFree(mpe ->ContextID, NewElem);
555 return NULL;
556 }
557
558
559 static
560 void CLutElemTypeFree(cmsStage* mpe)
561 {
562
563 _cmsStageCLutData* Data = (_cmsStageCLutData*) mpe ->Data;
564
565 // Already empty
566 if (Data == NULL) return;
567
568 // This works for both types
569 if (Data -> Tab.T)
570 _cmsFree(mpe ->ContextID, Data -> Tab.T);
571
572 _cmsFreeInterpParams(Data ->Params);
573 _cmsFree(mpe ->ContextID, mpe ->Data);
574 }
575
576
577 // Allocates a 16-bit multidimensional CLUT. This is evaluated at 16-bit precision. Table may have different
578 // granularity on each dimension.
579 cmsStage* CMSEXPORT cmsStageAllocCLut16bitGranular(cmsContext ContextID,
580 const cmsUInt32Number clutPoints[],
581 cmsUInt32Number inputChan,
582 cmsUInt32Number outputChan,
583 const cmsUInt16Number* Table)
584 {
585 cmsUInt32Number i, n;
586 _cmsStageCLutData* NewElem;
587 cmsStage* NewMPE;
588
589 _cmsAssert(clutPoints != NULL);
590
591 if (inputChan > MAX_INPUT_DIMENSIONS) {
592 cmsSignalError(ContextID, cmsERROR_RANGE, "Too many input channels (%d channels, max=%d)", inputChan, MAX_INPUT_DIMENSIONS);
593 return NULL;
594 }
595
596 NewMPE = _cmsStageAllocPlaceholder(ContextID, cmsSigCLutElemType, inputChan, outputChan,
597 EvaluateCLUTfloatIn16, CLUTElemDup, CLutElemTypeFree, NULL );
598
599 if (NewMPE == NULL) return NULL;
600
601 NewElem = (_cmsStageCLutData*) _cmsMallocZero(ContextID, sizeof(_cmsStageCLutData));
602 if (NewElem == NULL) {
603 cmsStageFree(NewMPE);
604 return NULL;
605 }
606
607 NewMPE ->Data = (void*) NewElem;
608
609 NewElem -> nEntries = n = outputChan * CubeSize(clutPoints, inputChan);
610 NewElem -> HasFloatValues = FALSE;
611
612 if (n == 0) {
613 cmsStageFree(NewMPE);
614 return NULL;
615 }
616
617
618 NewElem ->Tab.T = (cmsUInt16Number*) _cmsCalloc(ContextID, n, sizeof(cmsUInt16Number));
619 if (NewElem ->Tab.T == NULL) {
620 cmsStageFree(NewMPE);
621 return NULL;
622 }
623
624 if (Table != NULL) {
625 for (i=0; i < n; i++) {
626 NewElem ->Tab.T[i] = Table[i];
627 }
628 }
629
630 NewElem ->Params = _cmsComputeInterpParamsEx(ContextID, clutPoints, inputChan, outputChan, NewElem ->Tab.T, CMS_LERP_FLAGS_16BITS);
631 if (NewElem ->Params == NULL) {
632 cmsStageFree(NewMPE);
633 return NULL;
634 }
635
636 return NewMPE;
637 }
638
639 cmsStage* CMSEXPORT cmsStageAllocCLut16bit(cmsContext ContextID,
640 cmsUInt32Number nGridPoints,
641 cmsUInt32Number inputChan,
642 cmsUInt32Number outputChan,
643 const cmsUInt16Number* Table)
644 {
645 cmsUInt32Number Dimensions[MAX_INPUT_DIMENSIONS];
646 int i;
647
648 // Our resulting LUT would be same gridpoints on all dimensions
649 for (i=0; i < MAX_INPUT_DIMENSIONS; i++)
650 Dimensions[i] = nGridPoints;
651
652 return cmsStageAllocCLut16bitGranular(ContextID, Dimensions, inputChan, outputChan, Table);
653 }
654
655
656 cmsStage* CMSEXPORT cmsStageAllocCLutFloat(cmsContext ContextID,
657 cmsUInt32Number nGridPoints,
658 cmsUInt32Number inputChan,
659 cmsUInt32Number outputChan,
660 const cmsFloat32Number* Table)
661 {
662 cmsUInt32Number Dimensions[MAX_INPUT_DIMENSIONS];
663 int i;
664
665 // Our resulting LUT would be same gridpoints on all dimensions
666 for (i=0; i < MAX_INPUT_DIMENSIONS; i++)
667 Dimensions[i] = nGridPoints;
668
669 return cmsStageAllocCLutFloatGranular(ContextID, Dimensions, inputChan, outputChan, Table);
670 }
671
672
673
674 cmsStage* CMSEXPORT cmsStageAllocCLutFloatGranular(cmsContext ContextID, const cmsUInt32Number clutPoints[], cmsUInt32Number inputChan, cmsUInt32Number outputChan, const cmsFloat32Number* Table)
675 {
676 cmsUInt32Number i, n;
677 _cmsStageCLutData* NewElem;
678 cmsStage* NewMPE;
679
680 _cmsAssert(clutPoints != NULL);
681
682 if (inputChan > MAX_INPUT_DIMENSIONS) {
683 cmsSignalError(ContextID, cmsERROR_RANGE, "Too many input channels (%d channels, max=%d)", inputChan, MAX_INPUT_DIMENSIONS);
684 return NULL;
685 }
686
687 NewMPE = _cmsStageAllocPlaceholder(ContextID, cmsSigCLutElemType, inputChan, outputChan,
688 EvaluateCLUTfloat, CLUTElemDup, CLutElemTypeFree, NULL);
689 if (NewMPE == NULL) return NULL;
690
691
692 NewElem = (_cmsStageCLutData*) _cmsMallocZero(ContextID, sizeof(_cmsStageCLutData));
693 if (NewElem == NULL) {
694 cmsStageFree(NewMPE);
695 return NULL;
696 }
697
698 NewMPE ->Data = (void*) NewElem;
699
700 // There is a potential integer overflow on conputing n and nEntries.
701 NewElem -> nEntries = n = outputChan * CubeSize(clutPoints, inputChan);
702 NewElem -> HasFloatValues = TRUE;
703
704 if (n == 0) {
705 cmsStageFree(NewMPE);
706 return NULL;
707 }
708
709 NewElem ->Tab.TFloat = (cmsFloat32Number*) _cmsCalloc(ContextID, n, sizeof(cmsFloat32Number));
710 if (NewElem ->Tab.TFloat == NULL) {
711 cmsStageFree(NewMPE);
712 return NULL;
713 }
714
715 if (Table != NULL) {
716 for (i=0; i < n; i++) {
717 NewElem ->Tab.TFloat[i] = Table[i];
718 }
719 }
720
721 NewElem ->Params = _cmsComputeInterpParamsEx(ContextID, clutPoints, inputChan, outputChan, NewElem ->Tab.TFloat, CMS_LERP_FLAGS_FLOAT);
722 if (NewElem ->Params == NULL) {
723 cmsStageFree(NewMPE);
724 return NULL;
725 }
726
727 return NewMPE;
728 }
729
730
731 static
732 int IdentitySampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void * Cargo)
733 {
734 int nChan = *(int*) Cargo;
735 int i;
736
737 for (i=0; i < nChan; i++)
738 Out[i] = In[i];
739
740 return 1;
741 }
742
743 // Creates an MPE that just copies input to output
744 cmsStage* _cmsStageAllocIdentityCLut(cmsContext ContextID, int nChan)
745 {
746 cmsUInt32Number Dimensions[MAX_INPUT_DIMENSIONS];
747 cmsStage* mpe ;
748 int i;
749
750 for (i=0; i < MAX_INPUT_DIMENSIONS; i++)
751 Dimensions[i] = 2;
752
753 mpe = cmsStageAllocCLut16bitGranular(ContextID, Dimensions, nChan, nChan, NULL);
754 if (mpe == NULL) return NULL;
755
756 if (!cmsStageSampleCLut16bit(mpe, IdentitySampler, &nChan, 0)) {
757 cmsStageFree(mpe);
758 return NULL;
759 }
760
761 mpe ->Implements = cmsSigIdentityElemType;
762 return mpe;
763 }
764
765
766
767 // Quantize a value 0 <= i < MaxSamples to 0..0xffff
768 cmsUInt16Number _cmsQuantizeVal(cmsFloat64Number i, int MaxSamples)
769 {
770 cmsFloat64Number x;
771
772 x = ((cmsFloat64Number) i * 65535.) / (cmsFloat64Number) (MaxSamples - 1);
773 return _cmsQuickSaturateWord(x);
774 }
775
776
777 // This routine does a sweep on whole input space, and calls its callback
778 // function on knots. returns TRUE if all ok, FALSE otherwise.
779 cmsBool CMSEXPORT cmsStageSampleCLut16bit(cmsStage* mpe, cmsSAMPLER16 Sampler, void * Cargo, cmsUInt32Number dwFlags)
780 {
781 int i, t, nTotalPoints, index, rest;
782 int nInputs, nOutputs;
783 cmsUInt32Number* nSamples;
784 cmsUInt16Number In[MAX_INPUT_DIMENSIONS+1], Out[MAX_STAGE_CHANNELS];
785 _cmsStageCLutData* clut;
786
787 if (mpe == NULL) return FALSE;
788
789 clut = (_cmsStageCLutData*) mpe->Data;
790
791 if (clut == NULL) return FALSE;
792
793 nSamples = clut->Params ->nSamples;
794 nInputs = clut->Params ->nInputs;
795 nOutputs = clut->Params ->nOutputs;
796
797 if (nInputs <= 0) return FALSE;
798 if (nOutputs <= 0) return FALSE;
799 if (nInputs > MAX_INPUT_DIMENSIONS) return FALSE;
800 if (nOutputs >= MAX_STAGE_CHANNELS) return FALSE;
801
802 nTotalPoints = CubeSize(nSamples, nInputs);
803 if (nTotalPoints == 0) return FALSE;
804
805 index = 0;
806 for (i = 0; i < nTotalPoints; i++) {
807
808 rest = i;
809 for (t = nInputs-1; t >=0; --t) {
810
811 cmsUInt32Number Colorant = rest % nSamples[t];
812
813 rest /= nSamples[t];
814
815 In[t] = _cmsQuantizeVal(Colorant, nSamples[t]);
816 }
817
818 if (clut ->Tab.T != NULL) {
819 for (t=0; t < nOutputs; t++)
820 Out[t] = clut->Tab.T[index + t];
821 }
822
823 if (!Sampler(In, Out, Cargo))
824 return FALSE;
825
826 if (!(dwFlags & SAMPLER_INSPECT)) {
827
828 if (clut ->Tab.T != NULL) {
829 for (t=0; t < nOutputs; t++)
830 clut->Tab.T[index + t] = Out[t];
831 }
832 }
833
834 index += nOutputs;
835 }
836
837 return TRUE;
838 }
839
840 // Same as anterior, but for floting point
841 cmsBool CMSEXPORT cmsStageSampleCLutFloat(cmsStage* mpe, cmsSAMPLERFLOAT Sampler, void * Cargo, cmsUInt32Number dwFlags)
842 {
843 int i, t, nTotalPoints, index, rest;
844 int nInputs, nOutputs;
845 cmsUInt32Number* nSamples;
846 cmsFloat32Number In[MAX_INPUT_DIMENSIONS+1], Out[MAX_STAGE_CHANNELS];
847 _cmsStageCLutData* clut = (_cmsStageCLutData*) mpe->Data;
848
849 nSamples = clut->Params ->nSamples;
850 nInputs = clut->Params ->nInputs;
851 nOutputs = clut->Params ->nOutputs;
852
853 if (nInputs <= 0) return FALSE;
854 if (nOutputs <= 0) return FALSE;
855 if (nInputs > MAX_INPUT_DIMENSIONS) return FALSE;
856 if (nOutputs >= MAX_STAGE_CHANNELS) return FALSE;
857
858 nTotalPoints = CubeSize(nSamples, nInputs);
859 if (nTotalPoints == 0) return FALSE;
860
861 index = 0;
862 for (i = 0; i < nTotalPoints; i++) {
863
864 rest = i;
865 for (t = nInputs-1; t >=0; --t) {
866
867 cmsUInt32Number Colorant = rest % nSamples[t];
868
869 rest /= nSamples[t];
870
871 In[t] = (cmsFloat32Number) (_cmsQuantizeVal(Colorant, nSamples[t]) / 65535.0);
872 }
873
874 if (clut ->Tab.TFloat != NULL) {
875 for (t=0; t < nOutputs; t++)
876 Out[t] = clut->Tab.TFloat[index + t];
877 }
878
879 if (!Sampler(In, Out, Cargo))
880 return FALSE;
881
882 if (!(dwFlags & SAMPLER_INSPECT)) {
883
884 if (clut ->Tab.TFloat != NULL) {
885 for (t=0; t < nOutputs; t++)
886 clut->Tab.TFloat[index + t] = Out[t];
887 }
888 }
889
890 index += nOutputs;
891 }
892
893 return TRUE;
894 }
895
896
897
898 // This routine does a sweep on whole input space, and calls its callback
899 // function on knots. returns TRUE if all ok, FALSE otherwise.
900 cmsBool CMSEXPORT cmsSliceSpace16(cmsUInt32Number nInputs, const cmsUInt32Number clutPoints[],
901 cmsSAMPLER16 Sampler, void * Cargo)
902 {
903 int i, t, nTotalPoints, rest;
904 cmsUInt16Number In[cmsMAXCHANNELS];
905
906 if (nInputs >= cmsMAXCHANNELS) return FALSE;
907
908 nTotalPoints = CubeSize(clutPoints, nInputs);
909 if (nTotalPoints == 0) return FALSE;
910
911 for (i = 0; i < nTotalPoints; i++) {
912
913 rest = i;
914 for (t = nInputs-1; t >=0; --t) {
915
916 cmsUInt32Number Colorant = rest % clutPoints[t];
917
918 rest /= clutPoints[t];
919 In[t] = _cmsQuantizeVal(Colorant, clutPoints[t]);
920
921 }
922
923 if (!Sampler(In, NULL, Cargo))
924 return FALSE;
925 }
926
927 return TRUE;
928 }
929
930 cmsInt32Number CMSEXPORT cmsSliceSpaceFloat(cmsUInt32Number nInputs, const cmsUInt32Number clutPoints[],
931 cmsSAMPLERFLOAT Sampler, void * Cargo)
932 {
933 int i, t, nTotalPoints, rest;
934 cmsFloat32Number In[cmsMAXCHANNELS];
935
936 if (nInputs >= cmsMAXCHANNELS) return FALSE;
937
938 nTotalPoints = CubeSize(clutPoints, nInputs);
939 if (nTotalPoints == 0) return FALSE;
940
941 for (i = 0; i < nTotalPoints; i++) {
942
943 rest = i;
944 for (t = nInputs-1; t >=0; --t) {
945
946 cmsUInt32Number Colorant = rest % clutPoints[t];
947
948 rest /= clutPoints[t];
949 In[t] = (cmsFloat32Number) (_cmsQuantizeVal(Colorant, clutPoints[t]) / 65535.0);
950
951 }
952
953 if (!Sampler(In, NULL, Cargo))
954 return FALSE;
955 }
956
957 return TRUE;
958 }
959
960 // ********************************************************************************
961 // Type cmsSigLab2XYZElemType
962 // ********************************************************************************
963
964
965 static
966 void EvaluateLab2XYZ(const cmsFloat32Number In[],
967 cmsFloat32Number Out[],
968 const cmsStage *mpe)
969 {
970 cmsCIELab Lab;
971 cmsCIEXYZ XYZ;
972 const cmsFloat64Number XYZadj = MAX_ENCODEABLE_XYZ;
973
974 // V4 rules
975 Lab.L = In[0] * 100.0;
976 Lab.a = In[1] * 255.0 - 128.0;
977 Lab.b = In[2] * 255.0 - 128.0;
978
979 cmsLab2XYZ(NULL, &XYZ, &Lab);
980
981 // From XYZ, range 0..19997 to 0..1.0, note that 1.99997 comes from 0xffff
982 // encoded as 1.15 fixed point, so 1 + (32767.0 / 32768.0)
983
984 Out[0] = (cmsFloat32Number) ((cmsFloat64Number) XYZ.X / XYZadj);
985 Out[1] = (cmsFloat32Number) ((cmsFloat64Number) XYZ.Y / XYZadj);
986 Out[2] = (cmsFloat32Number) ((cmsFloat64Number) XYZ.Z / XYZadj);
987
988 cmsUNUSED_PARAMETER(mpe);
989
990 return;
991
992 }
993
994
995 // No dup or free routines needed, as the structure has no pointers in it.
996 cmsStage* _cmsStageAllocLab2XYZ(cmsContext ContextID)
997 {
998 return _cmsStageAllocPlaceholder(ContextID, cmsSigLab2XYZElemType, 3, 3, EvaluateLab2XYZ, NULL, NULL, NULL);
999 }
1000
1001 // ********************************************************************************
1002
1003 // v2 L=100 is supposed to be placed on 0xFF00. There is no reasonable
1004 // number of gridpoints that would make exact match. However, a prelinearization
1005 // of 258 entries, would map 0xFF00 exactly on entry 257, and this is good to avoid scum dot.
1006 // Almost all what we need but unfortunately, the rest of entries should be scaled by
1007 // (255*257/256) and this is not exact.
1008
1009 cmsStage* _cmsStageAllocLabV2ToV4curves(cmsContext ContextID)
1010 {
1011 cmsStage* mpe;
1012 cmsToneCurve* LabTable[3];
1013 int i, j;
1014
1015 LabTable[0] = cmsBuildTabulatedToneCurve16(ContextID, 258, NULL);
1016 LabTable[1] = cmsBuildTabulatedToneCurve16(ContextID, 258, NULL);
1017 LabTable[2] = cmsBuildTabulatedToneCurve16(ContextID, 258, NULL);
1018
1019 for (j=0; j < 3; j++) {
1020
1021 if (LabTable[j] == NULL) {
1022 cmsFreeToneCurveTriple(LabTable);
1023 return NULL;
1024 }
1025
1026 // We need to map * (0xffff / 0xff00), thats same as (257 / 256)
1027 // So we can use 258-entry tables to do the trick (i / 257) * (255 * 257) * (257 / 256);
1028 for (i=0; i < 257; i++) {
1029
1030 LabTable[j]->Table16[i] = (cmsUInt16Number) ((i * 0xffff + 0x80) >> 8);
1031 }
1032
1033 LabTable[j] ->Table16[257] = 0xffff;
1034 }
1035
1036 mpe = cmsStageAllocToneCurves(ContextID, 3, LabTable);
1037 cmsFreeToneCurveTriple(LabTable);
1038
1039 if (mpe == NULL) return NULL;
1040 mpe ->Implements = cmsSigLabV2toV4;
1041 return mpe;
1042 }
1043
1044 // ********************************************************************************
1045
1046 // Matrix-based conversion, which is more accurate, but slower and cannot properly be saved in devicelink profiles
1047 cmsStage* _cmsStageAllocLabV2ToV4(cmsContext ContextID)
1048 {
1049 static const cmsFloat64Number V2ToV4[] = { 65535.0/65280.0, 0, 0,
1050 0, 65535.0/65280.0, 0,
1051 0, 0, 65535.0/65280.0
1052 };
1053
1054 cmsStage *mpe = cmsStageAllocMatrix(ContextID, 3, 3, V2ToV4, NULL);
1055
1056 if (mpe == NULL) return mpe;
1057 mpe ->Implements = cmsSigLabV2toV4;
1058 return mpe;
1059 }
1060
1061
1062 // Reverse direction
1063 cmsStage* _cmsStageAllocLabV4ToV2(cmsContext ContextID)
1064 {
1065 static const cmsFloat64Number V4ToV2[] = { 65280.0/65535.0, 0, 0,
1066 0, 65280.0/65535.0, 0,
1067 0, 0, 65280.0/65535.0
1068 };
1069
1070 cmsStage *mpe = cmsStageAllocMatrix(ContextID, 3, 3, V4ToV2, NULL);
1071
1072 if (mpe == NULL) return mpe;
1073 mpe ->Implements = cmsSigLabV4toV2;
1074 return mpe;
1075 }
1076
1077
1078 // To Lab to float. Note that the MPE gives numbers in normal Lab range
1079 // and we need 0..1.0 range for the formatters
1080 // L* : 0...100 => 0...1.0 (L* / 100)
1081 // ab* : -128..+127 to 0..1 ((ab* + 128) / 255)
1082
1083 cmsStage* _cmsStageNormalizeFromLabFloat(cmsContext ContextID)
1084 {
1085 static const cmsFloat64Number a1[] = {
1086 1.0/100.0, 0, 0,
1087 0, 1.0/255.0, 0,
1088 0, 0, 1.0/255.0
1089 };
1090
1091 static const cmsFloat64Number o1[] = {
1092 0,
1093 128.0/255.0,
1094 128.0/255.0
1095 };
1096
1097 cmsStage *mpe = cmsStageAllocMatrix(ContextID, 3, 3, a1, o1);
1098
1099 if (mpe == NULL) return mpe;
1100 mpe ->Implements = cmsSigLab2FloatPCS;
1101 return mpe;
1102 }
1103
1104 // Fom XYZ to floating point PCS
1105 cmsStage* _cmsStageNormalizeFromXyzFloat(cmsContext ContextID)
1106 {
1107 #define n (32768.0/65535.0)
1108 static const cmsFloat64Number a1[] = {
1109 n, 0, 0,
1110 0, n, 0,
1111 0, 0, n
1112 };
1113 #undef n
1114
1115 cmsStage *mpe = cmsStageAllocMatrix(ContextID, 3, 3, a1, NULL);
1116
1117 if (mpe == NULL) return mpe;
1118 mpe ->Implements = cmsSigXYZ2FloatPCS;
1119 return mpe;
1120 }
1121
1122 cmsStage* _cmsStageNormalizeToLabFloat(cmsContext ContextID)
1123 {
1124 static const cmsFloat64Number a1[] = {
1125 100.0, 0, 0,
1126 0, 255.0, 0,
1127 0, 0, 255.0
1128 };
1129
1130 static const cmsFloat64Number o1[] = {
1131 0,
1132 -128.0,
1133 -128.0
1134 };
1135
1136 cmsStage *mpe = cmsStageAllocMatrix(ContextID, 3, 3, a1, o1);
1137 if (mpe == NULL) return mpe;
1138 mpe ->Implements = cmsSigFloatPCS2Lab;
1139 return mpe;
1140 }
1141
1142 cmsStage* _cmsStageNormalizeToXyzFloat(cmsContext ContextID)
1143 {
1144 #define n (65535.0/32768.0)
1145
1146 static const cmsFloat64Number a1[] = {
1147 n, 0, 0,
1148 0, n, 0,
1149 0, 0, n
1150 };
1151 #undef n
1152
1153 cmsStage *mpe = cmsStageAllocMatrix(ContextID, 3, 3, a1, NULL);
1154 if (mpe == NULL) return mpe;
1155 mpe ->Implements = cmsSigFloatPCS2XYZ;
1156 return mpe;
1157 }
1158
1159 // Clips values smaller than zero
1160 static
1161 void Clipper(const cmsFloat32Number In[], cmsFloat32Number Out[], const cmsStage *mpe)
1162 {
1163 cmsUInt32Number i;
1164 for (i = 0; i < mpe->InputChannels; i++) {
1165
1166 cmsFloat32Number n = In[i];
1167 Out[i] = n < 0 ? 0 : n;
1168 }
1169 }
1170
1171 cmsStage* _cmsStageClipNegatives(cmsContext ContextID, int nChannels)
1172 {
1173 return _cmsStageAllocPlaceholder(ContextID, cmsSigClipNegativesElemType,
1174 nChannels, nChannels, Clipper, NULL, NULL, NULL);
1175 }
1176
1177 // ********************************************************************************
1178 // Type cmsSigXYZ2LabElemType
1179 // ********************************************************************************
1180
1181 static
1182 void EvaluateXYZ2Lab(const cmsFloat32Number In[], cmsFloat32Number Out[], const cmsStage *mpe)
1183 {
1184 cmsCIELab Lab;
1185 cmsCIEXYZ XYZ;
1186 const cmsFloat64Number XYZadj = MAX_ENCODEABLE_XYZ;
1187
1188 // From 0..1.0 to XYZ
1189
1190 XYZ.X = In[0] * XYZadj;
1191 XYZ.Y = In[1] * XYZadj;
1192 XYZ.Z = In[2] * XYZadj;
1193
1194 cmsXYZ2Lab(NULL, &Lab, &XYZ);
1195
1196 // From V4 Lab to 0..1.0
1197
1198 Out[0] = (cmsFloat32Number) (Lab.L / 100.0);
1199 Out[1] = (cmsFloat32Number) ((Lab.a + 128.0) / 255.0);
1200 Out[2] = (cmsFloat32Number) ((Lab.b + 128.0) / 255.0);
1201
1202 cmsUNUSED_PARAMETER(mpe);
1203
1204 return;
1205
1206 }
1207
1208 cmsStage* _cmsStageAllocXYZ2Lab(cmsContext ContextID)
1209 {
1210 return _cmsStageAllocPlaceholder(ContextID, cmsSigXYZ2LabElemType, 3, 3, EvaluateXYZ2Lab, NULL, NULL, NULL);
1211
1212 }
1213
1214 // ********************************************************************************
1215
1216 // For v4, S-Shaped curves are placed in a/b axis to increase resolution near gray
1217
1218 cmsStage* _cmsStageAllocLabPrelin(cmsContext ContextID)
1219 {
1220 cmsToneCurve* LabTable[3];
1221 cmsFloat64Number Params[1] = {2.4} ;
1222
1223 LabTable[0] = cmsBuildGamma(ContextID, 1.0);
1224 LabTable[1] = cmsBuildParametricToneCurve(ContextID, 108, Params);
1225 LabTable[2] = cmsBuildParametricToneCurve(ContextID, 108, Params);
1226
1227 return cmsStageAllocToneCurves(ContextID, 3, LabTable);
1228 }
1229
1230
1231 // Free a single MPE
1232 void CMSEXPORT cmsStageFree(cmsStage* mpe)
1233 {
1234 if (mpe ->FreePtr)
1235 mpe ->FreePtr(mpe);
1236
1237 _cmsFree(mpe ->ContextID, mpe);
1238 }
1239
1240
1241 cmsUInt32Number CMSEXPORT cmsStageInputChannels(const cmsStage* mpe)
1242 {
1243 return mpe ->InputChannels;
1244 }
1245
1246 cmsUInt32Number CMSEXPORT cmsStageOutputChannels(const cmsStage* mpe)
1247 {
1248 return mpe ->OutputChannels;
1249 }
1250
1251 cmsStageSignature CMSEXPORT cmsStageType(const cmsStage* mpe)
1252 {
1253 return mpe -> Type;
1254 }
1255
1256 void* CMSEXPORT cmsStageData(const cmsStage* mpe)
1257 {
1258 return mpe -> Data;
1259 }
1260
1261 cmsStage* CMSEXPORT cmsStageNext(const cmsStage* mpe)
1262 {
1263 return mpe -> Next;
1264 }
1265
1266
1267 // Duplicates an MPE
1268 cmsStage* CMSEXPORT cmsStageDup(cmsStage* mpe)
1269 {
1270 cmsStage* NewMPE;
1271
1272 if (mpe == NULL) return NULL;
1273 NewMPE = _cmsStageAllocPlaceholder(mpe ->ContextID,
1274 mpe ->Type,
1275 mpe ->InputChannels,
1276 mpe ->OutputChannels,
1277 mpe ->EvalPtr,
1278 mpe ->DupElemPtr,
1279 mpe ->FreePtr,
1280 NULL);
1281 if (NewMPE == NULL) return NULL;
1282
1283 NewMPE ->Implements = mpe ->Implements;
1284
1285 if (mpe ->DupElemPtr) {
1286
1287 NewMPE ->Data = mpe ->DupElemPtr(mpe);
1288
1289 if (NewMPE->Data == NULL) {
1290
1291 cmsStageFree(NewMPE);
1292 return NULL;
1293 }
1294
1295 } else {
1296
1297 NewMPE ->Data = NULL;
1298 }
1299
1300 return NewMPE;
1301 }
1302
1303
1304 // ***********************************************************************************************************
1305
1306 // This function sets up the channel count
1307
1308 static
1309 void BlessLUT(cmsPipeline* lut)
1310 {
1311 // We can set the input/ouput channels only if we have elements.
1312 if (lut ->Elements != NULL) {
1313
1314 cmsStage *First, *Last;
1315
1316 First = cmsPipelineGetPtrToFirstStage(lut);
1317 Last = cmsPipelineGetPtrToLastStage(lut);
1318
1319 if (First != NULL)lut ->InputChannels = First ->InputChannels;
1320 if (Last != NULL) lut ->OutputChannels = Last ->OutputChannels;
1321 }
1322 }
1323
1324
1325 // Default to evaluate the LUT on 16 bit-basis. Precision is retained.
1326 static
1327 void _LUTeval16(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register const void* D)
1328 {
1329 cmsPipeline* lut = (cmsPipeline*) D;
1330 cmsStage *mpe;
1331 cmsFloat32Number Storage[2][MAX_STAGE_CHANNELS];
1332 int Phase = 0, NextPhase;
1333
1334 From16ToFloat(In, &Storage[Phase][0], lut ->InputChannels);
1335
1336 for (mpe = lut ->Elements;
1337 mpe != NULL;
1338 mpe = mpe ->Next) {
1339
1340 NextPhase = Phase ^ 1;
1341 mpe ->EvalPtr(&Storage[Phase][0], &Storage[NextPhase][0], mpe);
1342 Phase = NextPhase;
1343 }
1344
1345
1346 FromFloatTo16(&Storage[Phase][0], Out, lut ->OutputChannels);
1347 }
1348
1349
1350
1351 // Does evaluate the LUT on cmsFloat32Number-basis.
1352 static
1353 void _LUTevalFloat(register const cmsFloat32Number In[], register cmsFloat32Number Out[], const void* D)
1354 {
1355 cmsPipeline* lut = (cmsPipeline*) D;
1356 cmsStage *mpe;
1357 cmsFloat32Number Storage[2][MAX_STAGE_CHANNELS];
1358 int Phase = 0, NextPhase;
1359
1360 memmove(&Storage[Phase][0], In, lut ->InputChannels * sizeof(cmsFloat32Number));
1361
1362 for (mpe = lut ->Elements;
1363 mpe != NULL;
1364 mpe = mpe ->Next) {
1365
1366 NextPhase = Phase ^ 1;
1367 mpe ->EvalPtr(&Storage[Phase][0], &Storage[NextPhase][0], mpe);
1368 Phase = NextPhase;
1369 }
1370
1371 memmove(Out, &Storage[Phase][0], lut ->OutputChannels * sizeof(cmsFloat32Number));
1372 }
1373
1374
1375
1376
1377 // LUT Creation & Destruction
1378
1379 cmsPipeline* CMSEXPORT cmsPipelineAlloc(cmsContext ContextID, cmsUInt32Number InputChannels, cmsUInt32Number OutputChannels)
1380 {
1381 cmsPipeline* NewLUT;
1382
1383 if (InputChannels >= cmsMAXCHANNELS ||
1384 OutputChannels >= cmsMAXCHANNELS) return NULL;
1385
1386 NewLUT = (cmsPipeline*) _cmsMallocZero(ContextID, sizeof(cmsPipeline));
1387 if (NewLUT == NULL) return NULL;
1388
1389
1390 NewLUT -> InputChannels = InputChannels;
1391 NewLUT -> OutputChannels = OutputChannels;
1392
1393 NewLUT ->Eval16Fn = _LUTeval16;
1394 NewLUT ->EvalFloatFn = _LUTevalFloat;
1395 NewLUT ->DupDataFn = NULL;
1396 NewLUT ->FreeDataFn = NULL;
1397 NewLUT ->Data = NewLUT;
1398 NewLUT ->ContextID = ContextID;
1399
1400 BlessLUT(NewLUT);
1401
1402 return NewLUT;
1403 }
1404
1405 cmsContext CMSEXPORT cmsGetPipelineContextID(const cmsPipeline* lut)
1406 {
1407 _cmsAssert(lut != NULL);
1408 return lut ->ContextID;
1409 }
1410
1411 cmsUInt32Number CMSEXPORT cmsPipelineInputChannels(const cmsPipeline* lut)
1412 {
1413 _cmsAssert(lut != NULL);
1414 return lut ->InputChannels;
1415 }
1416
1417 cmsUInt32Number CMSEXPORT cmsPipelineOutputChannels(const cmsPipeline* lut)
1418 {
1419 _cmsAssert(lut != NULL);
1420 return lut ->OutputChannels;
1421 }
1422
1423 // Free a profile elements LUT
1424 void CMSEXPORT cmsPipelineFree(cmsPipeline* lut)
1425 {
1426 cmsStage *mpe, *Next;
1427
1428 if (lut == NULL) return;
1429
1430 for (mpe = lut ->Elements;
1431 mpe != NULL;
1432 mpe = Next) {
1433
1434 Next = mpe ->Next;
1435 cmsStageFree(mpe);
1436 }
1437
1438 if (lut ->FreeDataFn) lut ->FreeDataFn(lut ->ContextID, lut ->Data);
1439
1440 _cmsFree(lut ->ContextID, lut);
1441 }
1442
1443
1444 // Default to evaluate the LUT on 16 bit-basis.
1445 void CMSEXPORT cmsPipelineEval16(const cmsUInt16Number In[], cmsUInt16Number Out[], const cmsPipeline* lut)
1446 {
1447 _cmsAssert(lut != NULL);
1448 lut ->Eval16Fn(In, Out, lut->Data);
1449 }
1450
1451
1452 // Does evaluate the LUT on cmsFloat32Number-basis.
1453 void CMSEXPORT cmsPipelineEvalFloat(const cmsFloat32Number In[], cmsFloat32Number Out[], const cmsPipeline* lut)
1454 {
1455 _cmsAssert(lut != NULL);
1456 lut ->EvalFloatFn(In, Out, lut);
1457 }
1458
1459
1460
1461 // Duplicates a LUT
1462 cmsPipeline* CMSEXPORT cmsPipelineDup(const cmsPipeline* lut)
1463 {
1464 cmsPipeline* NewLUT;
1465 cmsStage *NewMPE, *Anterior = NULL, *mpe;
1466 cmsBool First = TRUE;
1467
1468 if (lut == NULL) return NULL;
1469
1470 NewLUT = cmsPipelineAlloc(lut ->ContextID, lut ->InputChannels, lut ->OutputChannels);
1471 if (NewLUT == NULL) return NULL;
1472
1473 for (mpe = lut ->Elements;
1474 mpe != NULL;
1475 mpe = mpe ->Next) {
1476
1477 NewMPE = cmsStageDup(mpe);
1478
1479 if (NewMPE == NULL) {
1480 cmsPipelineFree(NewLUT);
1481 return NULL;
1482 }
1483
1484 if (First) {
1485 NewLUT ->Elements = NewMPE;
1486 First = FALSE;
1487 }
1488 else {
1489 Anterior ->Next = NewMPE;
1490 }
1491
1492 Anterior = NewMPE;
1493 }
1494
1495 NewLUT ->Eval16Fn = lut ->Eval16Fn;
1496 NewLUT ->EvalFloatFn = lut ->EvalFloatFn;
1497 NewLUT ->DupDataFn = lut ->DupDataFn;
1498 NewLUT ->FreeDataFn = lut ->FreeDataFn;
1499
1500 if (NewLUT ->DupDataFn != NULL)
1501 NewLUT ->Data = NewLUT ->DupDataFn(lut ->ContextID, lut->Data);
1502
1503
1504 NewLUT ->SaveAs8Bits = lut ->SaveAs8Bits;
1505
1506 BlessLUT(NewLUT);
1507 return NewLUT;
1508 }
1509
1510
1511 int CMSEXPORT cmsPipelineInsertStage(cmsPipeline* lut, cmsStageLoc loc, cmsStage* mpe)
1512 {
1513 cmsStage* Anterior = NULL, *pt;
1514
1515 if (lut == NULL || mpe == NULL)
1516 return FALSE;
1517
1518 switch (loc) {
1519
1520 case cmsAT_BEGIN:
1521 mpe ->Next = lut ->Elements;
1522 lut ->Elements = mpe;
1523 break;
1524
1525 case cmsAT_END:
1526
1527 if (lut ->Elements == NULL)
1528 lut ->Elements = mpe;
1529 else {
1530
1531 for (pt = lut ->Elements;
1532 pt != NULL;
1533 pt = pt -> Next) Anterior = pt;
1534
1535 Anterior ->Next = mpe;
1536 mpe ->Next = NULL;
1537 }
1538 break;
1539 default:;
1540 return FALSE;
1541 }
1542
1543 BlessLUT(lut);
1544 return TRUE;
1545 }
1546
1547 // Unlink an element and return the pointer to it
1548 void CMSEXPORT cmsPipelineUnlinkStage(cmsPipeline* lut, cmsStageLoc loc, cmsStage** mpe)
1549 {
1550 cmsStage *Anterior, *pt, *Last;
1551 cmsStage *Unlinked = NULL;
1552
1553
1554 // If empty LUT, there is nothing to remove
1555 if (lut ->Elements == NULL) {
1556 if (mpe) *mpe = NULL;
1557 return;
1558 }
1559
1560 // On depending on the strategy...
1561 switch (loc) {
1562
1563 case cmsAT_BEGIN:
1564 {
1565 cmsStage* elem = lut ->Elements;
1566
1567 lut ->Elements = elem -> Next;
1568 elem ->Next = NULL;
1569 Unlinked = elem;
1570
1571 }
1572 break;
1573
1574 case cmsAT_END:
1575 Anterior = Last = NULL;
1576 for (pt = lut ->Elements;
1577 pt != NULL;
1578 pt = pt -> Next) {
1579 Anterior = Last;
1580 Last = pt;
1581 }
1582
1583 Unlinked = Last; // Next already points to NULL
1584
1585 // Truncate the chain
1586 if (Anterior)
1587 Anterior ->Next = NULL;
1588 else
1589 lut ->Elements = NULL;
1590 break;
1591 default:;
1592 }
1593
1594 if (mpe)
1595 *mpe = Unlinked;
1596 else
1597 cmsStageFree(Unlinked);
1598
1599 BlessLUT(lut);
1600 }
1601
1602
1603 // Concatenate two LUT into a new single one
1604 cmsBool CMSEXPORT cmsPipelineCat(cmsPipeline* l1, const cmsPipeline* l2)
1605 {
1606 cmsStage* mpe;
1607
1608 // If both LUTS does not have elements, we need to inherit
1609 // the number of channels
1610 if (l1 ->Elements == NULL && l2 ->Elements == NULL) {
1611 l1 ->InputChannels = l2 ->InputChannels;
1612 l1 ->OutputChannels = l2 ->OutputChannels;
1613 }
1614
1615 // Cat second
1616 for (mpe = l2 ->Elements;
1617 mpe != NULL;
1618 mpe = mpe ->Next) {
1619
1620 // We have to dup each element
1621 if (!cmsPipelineInsertStage(l1, cmsAT_END, cmsStageDup(mpe)))
1622 return FALSE;
1623 }
1624
1625 BlessLUT(l1);
1626 return TRUE;
1627 }
1628
1629
1630 cmsBool CMSEXPORT cmsPipelineSetSaveAs8bitsFlag(cmsPipeline* lut, cmsBool On)
1631 {
1632 cmsBool Anterior = lut ->SaveAs8Bits;
1633
1634 lut ->SaveAs8Bits = On;
1635 return Anterior;
1636 }
1637
1638
1639 cmsStage* CMSEXPORT cmsPipelineGetPtrToFirstStage(const cmsPipeline* lut)
1640 {
1641 return lut ->Elements;
1642 }
1643
1644 cmsStage* CMSEXPORT cmsPipelineGetPtrToLastStage(const cmsPipeline* lut)
1645 {
1646 cmsStage *mpe, *Anterior = NULL;
1647
1648 for (mpe = lut ->Elements; mpe != NULL; mpe = mpe ->Next)
1649 Anterior = mpe;
1650
1651 return Anterior;
1652 }
1653
1654 cmsUInt32Number CMSEXPORT cmsPipelineStageCount(const cmsPipeline* lut)
1655 {
1656 cmsStage *mpe;
1657 cmsUInt32Number n;
1658
1659 for (n=0, mpe = lut ->Elements; mpe != NULL; mpe = mpe ->Next)
1660 n++;
1661
1662 return n;
1663 }
1664
1665 // This function may be used to set the optional evaluator and a block of private data. If private data is being used, an optional
1666 // duplicator and free functions should also be specified in order to duplicate the LUT construct. Use NULL to inhibit such functionality.
1667 void CMSEXPORT _cmsPipelineSetOptimizationParameters(cmsPipeline* Lut,
1668 _cmsOPTeval16Fn Eval16,
1669 void* PrivateData,
1670 _cmsFreeUserDataFn FreePrivateDataFn,
1671 _cmsDupUserDataFn DupPrivateDataFn)
1672 {
1673
1674 Lut ->Eval16Fn = Eval16;
1675 Lut ->DupDataFn = DupPrivateDataFn;
1676 Lut ->FreeDataFn = FreePrivateDataFn;
1677 Lut ->Data = PrivateData;
1678 }
1679
1680
1681 // ----------------------------------------------------------- Reverse interpolation
1682 // Here's how it goes. The derivative Df(x) of the function f is the linear
1683 // transformation that best approximates f near the point x. It can be represented
1684 // by a matrix A whose entries are the partial derivatives of the components of f
1685 // with respect to all the coordinates. This is know as the Jacobian
1686 //
1687 // The best linear approximation to f is given by the matrix equation:
1688 //
1689 // y-y0 = A (x-x0)
1690 //
1691 // So, if x0 is a good "guess" for the zero of f, then solving for the zero of this
1692 // linear approximation will give a "better guess" for the zero of f. Thus let y=0,
1693 // and since y0=f(x0) one can solve the above equation for x. This leads to the
1694 // Newton's method formula:
1695 //
1696 // xn+1 = xn - A-1 f(xn)
1697 //
1698 // where xn+1 denotes the (n+1)-st guess, obtained from the n-th guess xn in the
1699 // fashion described above. Iterating this will give better and better approximations
1700 // if you have a "good enough" initial guess.
1701
1702
1703 #define JACOBIAN_EPSILON 0.001f
1704 #define INVERSION_MAX_ITERATIONS 30
1705
1706 // Increment with reflexion on boundary
1707 static
1708 void IncDelta(cmsFloat32Number *Val)
1709 {
1710 if (*Val < (1.0 - JACOBIAN_EPSILON))
1711
1712 *Val += JACOBIAN_EPSILON;
1713
1714 else
1715 *Val -= JACOBIAN_EPSILON;
1716
1717 }
1718
1719
1720
1721 // Euclidean distance between two vectors of n elements each one
1722 static
1723 cmsFloat32Number EuclideanDistance(cmsFloat32Number a[], cmsFloat32Number b[], int n)
1724 {
1725 cmsFloat32Number sum = 0;
1726 int i;
1727
1728 for (i=0; i < n; i++) {
1729 cmsFloat32Number dif = b[i] - a[i];
1730 sum += dif * dif;
1731 }
1732
1733 return sqrtf(sum);
1734 }
1735
1736
1737 // Evaluate a LUT in reverse direction. It only searches on 3->3 LUT. Uses Newton method
1738 //
1739 // x1 <- x - [J(x)]^-1 * f(x)
1740 //
1741 // lut: The LUT on where to do the search
1742 // Target: LabK, 3 values of Lab plus destination K which is fixed
1743 // Result: The obtained CMYK
1744 // Hint: Location where begin the search
1745
1746 cmsBool CMSEXPORT cmsPipelineEvalReverseFloat(cmsFloat32Number Target[],
1747 cmsFloat32Number Result[],
1748 cmsFloat32Number Hint[],
1749 const cmsPipeline* lut)
1750 {
1751 cmsUInt32Number i, j;
1752 cmsFloat64Number error, LastError = 1E20;
1753 cmsFloat32Number fx[4], x[4], xd[4], fxd[4];
1754 cmsVEC3 tmp, tmp2;
1755 cmsMAT3 Jacobian;
1756
1757 // Only 3->3 and 4->3 are supported
1758 if (lut ->InputChannels != 3 && lut ->InputChannels != 4) return FALSE;
1759 if (lut ->OutputChannels != 3) return FALSE;
1760
1761 // Take the hint as starting point if specified
1762 if (Hint == NULL) {
1763
1764 // Begin at any point, we choose 1/3 of CMY axis
1765 x[0] = x[1] = x[2] = 0.3f;
1766 }
1767 else {
1768
1769 // Only copy 3 channels from hint...
1770 for (j=0; j < 3; j++)
1771 x[j] = Hint[j];
1772 }
1773
1774 // If Lut is 4-dimensions, then grab target[3], which is fixed
1775 if (lut ->InputChannels == 4) {
1776 x[3] = Target[3];
1777 }
1778 else x[3] = 0; // To keep lint happy
1779
1780
1781 // Iterate
1782 for (i = 0; i < INVERSION_MAX_ITERATIONS; i++) {
1783
1784 // Get beginning fx
1785 cmsPipelineEvalFloat(x, fx, lut);
1786
1787 // Compute error
1788 error = EuclideanDistance(fx, Target, 3);
1789
1790 // If not convergent, return last safe value
1791 if (error >= LastError)
1792 break;
1793
1794 // Keep latest values
1795 LastError = error;
1796 for (j=0; j < lut ->InputChannels; j++)
1797 Result[j] = x[j];
1798
1799 // Found an exact match?
1800 if (error <= 0)
1801 break;
1802
1803 // Obtain slope (the Jacobian)
1804 for (j = 0; j < 3; j++) {
1805
1806 xd[0] = x[0];
1807 xd[1] = x[1];
1808 xd[2] = x[2];
1809 xd[3] = x[3]; // Keep fixed channel
1810
1811 IncDelta(&xd[j]);
1812
1813 cmsPipelineEvalFloat(xd, fxd, lut);
1814
1815 Jacobian.v[0].n[j] = ((fxd[0] - fx[0]) / JACOBIAN_EPSILON);
1816 Jacobian.v[1].n[j] = ((fxd[1] - fx[1]) / JACOBIAN_EPSILON);
1817 Jacobian.v[2].n[j] = ((fxd[2] - fx[2]) / JACOBIAN_EPSILON);
1818 }
1819
1820 // Solve system
1821 tmp2.n[0] = fx[0] - Target[0];
1822 tmp2.n[1] = fx[1] - Target[1];
1823 tmp2.n[2] = fx[2] - Target[2];
1824
1825 if (!_cmsMAT3solve(&tmp, &Jacobian, &tmp2))
1826 return FALSE;
1827
1828 // Move our guess
1829 x[0] -= (cmsFloat32Number) tmp.n[0];
1830 x[1] -= (cmsFloat32Number) tmp.n[1];
1831 x[2] -= (cmsFloat32Number) tmp.n[2];
1832
1833 // Some clipping....
1834 for (j=0; j < 3; j++) {
1835 if (x[j] < 0) x[j] = 0;
1836 else
1837 if (x[j] > 1.0) x[j] = 1.0;
1838 }
1839 }
1840
1841 return TRUE;
1842 }