1 //---------------------------------------------------------------------------------
2 //
3 // Little Color Management System
4 // Copyright (c) 1998-2023 Marti Maria Saguer
5 //
6 // Permission is hereby granted, free of charge, to any person obtaining
7 // a copy of this software and associated documentation files (the "Software"),
8 // to deal in the Software without restriction, including without limitation
9 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 // and/or sell copies of the Software, and to permit persons to whom the Software
11 // is furnished to do so, subject to the following conditions:
12 //
13 // The above copyright notice and this permission notice shall be included in
14 // all copies or substantial portions of the Software.
15 //
16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
18 // THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 //
24 //---------------------------------------------------------------------------------
25 //
26
27 #include "lcms2_internal.h"
28
29 // Read tags using low-level functions, provides necessary glue code to adapt versions, etc.
30
31 // LUT tags
32 static const cmsTagSignature Device2PCS16[] = {cmsSigAToB0Tag, // Perceptual
33 cmsSigAToB1Tag, // Relative colorimetric
34 cmsSigAToB2Tag, // Saturation
35 cmsSigAToB1Tag }; // Absolute colorimetric
36
37 static const cmsTagSignature Device2PCSFloat[] = {cmsSigDToB0Tag, // Perceptual
38 cmsSigDToB1Tag, // Relative colorimetric
39 cmsSigDToB2Tag, // Saturation
40 cmsSigDToB3Tag }; // Absolute colorimetric
41
42 static const cmsTagSignature PCS2Device16[] = {cmsSigBToA0Tag, // Perceptual
43 cmsSigBToA1Tag, // Relative colorimetric
44 cmsSigBToA2Tag, // Saturation
45 cmsSigBToA1Tag }; // Absolute colorimetric
46
47 static const cmsTagSignature PCS2DeviceFloat[] = {cmsSigBToD0Tag, // Perceptual
48 cmsSigBToD1Tag, // Relative colorimetric
49 cmsSigBToD2Tag, // Saturation
50 cmsSigBToD3Tag }; // Absolute colorimetric
51
52
53 // Factors to convert from 1.15 fixed point to 0..1.0 range and vice-versa
54 #define InpAdj (1.0/MAX_ENCODEABLE_XYZ) // (65536.0/(65535.0*2.0))
55 #define OutpAdj (MAX_ENCODEABLE_XYZ) // ((2.0*65535.0)/65536.0)
56
57 // Several resources for gray conversions.
58 static const cmsFloat64Number GrayInputMatrix[] = { (InpAdj*cmsD50X), (InpAdj*cmsD50Y), (InpAdj*cmsD50Z) };
59 static const cmsFloat64Number OneToThreeInputMatrix[] = { 1, 1, 1 };
60 static const cmsFloat64Number PickYMatrix[] = { 0, (OutpAdj*cmsD50Y), 0 };
61 static const cmsFloat64Number PickLstarMatrix[] = { 1, 0, 0 };
62
63 // Get a media white point fixing some issues found in certain old profiles
_cmsReadMediaWhitePoint(cmsCIEXYZ * Dest,cmsHPROFILE hProfile)64 cmsBool _cmsReadMediaWhitePoint(cmsCIEXYZ* Dest, cmsHPROFILE hProfile)
65 {
66 cmsCIEXYZ* Tag;
67
68 _cmsAssert(Dest != NULL);
69
70 Tag = (cmsCIEXYZ*) cmsReadTag(hProfile, cmsSigMediaWhitePointTag);
71
72 // If no wp, take D50
73 if (Tag == NULL) {
74 *Dest = *cmsD50_XYZ();
75 return TRUE;
76 }
77
78 // V2 display profiles should give D50
79 if (cmsGetEncodedICCversion(hProfile) < 0x4000000) {
80
81 if (cmsGetDeviceClass(hProfile) == cmsSigDisplayClass) {
82 *Dest = *cmsD50_XYZ();
83 return TRUE;
84 }
85 }
86
87 // All seems ok
88 *Dest = *Tag;
89 return TRUE;
90 }
91
92
93 // Chromatic adaptation matrix. Fix some issues as well
_cmsReadCHAD(cmsMAT3 * Dest,cmsHPROFILE hProfile)94 cmsBool _cmsReadCHAD(cmsMAT3* Dest, cmsHPROFILE hProfile)
95 {
96 cmsMAT3* Tag;
97
98 _cmsAssert(Dest != NULL);
99
100 Tag = (cmsMAT3*) cmsReadTag(hProfile, cmsSigChromaticAdaptationTag);
101
102 if (Tag != NULL) {
103 *Dest = *Tag;
104 return TRUE;
105 }
106
107 // No CHAD available, default it to identity
108 _cmsMAT3identity(Dest);
109
110 // V2 display profiles should give D50
111 if (cmsGetEncodedICCversion(hProfile) < 0x4000000) {
112
113 if (cmsGetDeviceClass(hProfile) == cmsSigDisplayClass) {
114
115 cmsCIEXYZ* White = (cmsCIEXYZ*) cmsReadTag(hProfile, cmsSigMediaWhitePointTag);
116
117 if (White == NULL) {
118
119 _cmsMAT3identity(Dest);
120 return TRUE;
121 }
122
123 return _cmsAdaptationMatrix(Dest, NULL, White, cmsD50_XYZ());
124 }
125 }
126
127 return TRUE;
128 }
129
130
131 // Auxiliary, read colorants as a MAT3 structure. Used by any function that needs a matrix-shaper
132 static
ReadICCMatrixRGB2XYZ(cmsMAT3 * r,cmsHPROFILE hProfile)133 cmsBool ReadICCMatrixRGB2XYZ(cmsMAT3* r, cmsHPROFILE hProfile)
134 {
135 cmsCIEXYZ *PtrRed, *PtrGreen, *PtrBlue;
136
137 _cmsAssert(r != NULL);
138
139 PtrRed = (cmsCIEXYZ *) cmsReadTag(hProfile, cmsSigRedColorantTag);
140 PtrGreen = (cmsCIEXYZ *) cmsReadTag(hProfile, cmsSigGreenColorantTag);
141 PtrBlue = (cmsCIEXYZ *) cmsReadTag(hProfile, cmsSigBlueColorantTag);
142
143 if (PtrRed == NULL || PtrGreen == NULL || PtrBlue == NULL)
144 return FALSE;
145
146 _cmsVEC3init(&r -> v[0], PtrRed -> X, PtrGreen -> X, PtrBlue -> X);
147 _cmsVEC3init(&r -> v[1], PtrRed -> Y, PtrGreen -> Y, PtrBlue -> Y);
148 _cmsVEC3init(&r -> v[2], PtrRed -> Z, PtrGreen -> Z, PtrBlue -> Z);
149
150 return TRUE;
151 }
152
153
154 // Gray input pipeline
155 static
BuildGrayInputMatrixPipeline(cmsHPROFILE hProfile)156 cmsPipeline* BuildGrayInputMatrixPipeline(cmsHPROFILE hProfile)
157 {
158 cmsToneCurve *GrayTRC;
159 cmsPipeline* Lut;
160 cmsContext ContextID = cmsGetProfileContextID(hProfile);
161
162 GrayTRC = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGrayTRCTag);
163 if (GrayTRC == NULL) return NULL;
164
165 Lut = cmsPipelineAlloc(ContextID, 1, 3);
166 if (Lut == NULL)
167 goto Error;
168
169 if (cmsGetPCS(hProfile) == cmsSigLabData) {
170
171 // In this case we implement the profile as an identity matrix plus 3 tone curves
172 cmsUInt16Number Zero[2] = { 0x8080, 0x8080 };
173 cmsToneCurve* EmptyTab;
174 cmsToneCurve* LabCurves[3];
175
176 EmptyTab = cmsBuildTabulatedToneCurve16(ContextID, 2, Zero);
177
178 if (EmptyTab == NULL)
179 goto Error;
180
181 LabCurves[0] = GrayTRC;
182 LabCurves[1] = EmptyTab;
183 LabCurves[2] = EmptyTab;
184
185 if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 1, OneToThreeInputMatrix, NULL)) ||
186 !cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 3, LabCurves))) {
187 cmsFreeToneCurve(EmptyTab);
188 goto Error;
189 }
190
191 cmsFreeToneCurve(EmptyTab);
192
193 }
194 else {
195
196 if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 1, &GrayTRC)) ||
197 !cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 1, GrayInputMatrix, NULL)))
198 goto Error;
199 }
200
201 return Lut;
202
203 Error:
204 cmsPipelineFree(Lut);
205 return NULL;
206 }
207
208 // RGB Matrix shaper
209 static
BuildRGBInputMatrixShaper(cmsHPROFILE hProfile)210 cmsPipeline* BuildRGBInputMatrixShaper(cmsHPROFILE hProfile)
211 {
212 cmsPipeline* Lut;
213 cmsMAT3 Mat;
214 cmsToneCurve *Shapes[3];
215 cmsContext ContextID = cmsGetProfileContextID(hProfile);
216 int i, j;
217
218 if (!ReadICCMatrixRGB2XYZ(&Mat, hProfile)) return NULL;
219
220 // XYZ PCS in encoded in 1.15 format, and the matrix output comes in 0..0xffff range, so
221 // we need to adjust the output by a factor of (0x10000/0xffff) to put data in
222 // a 1.16 range, and then a >> 1 to obtain 1.15. The total factor is (65536.0)/(65535.0*2)
223
224 for (i=0; i < 3; i++)
225 for (j=0; j < 3; j++)
226 Mat.v[i].n[j] *= InpAdj;
227
228
229 Shapes[0] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigRedTRCTag);
230 Shapes[1] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGreenTRCTag);
231 Shapes[2] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigBlueTRCTag);
232
233 if (!Shapes[0] || !Shapes[1] || !Shapes[2])
234 return NULL;
235
236 Lut = cmsPipelineAlloc(ContextID, 3, 3);
237 if (Lut != NULL) {
238
239 if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 3, Shapes)) ||
240 !cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 3, (cmsFloat64Number*) &Mat, NULL)))
241 goto Error;
242
243 // Note that it is certainly possible a single profile would have a LUT based
244 // tag for output working in lab and a matrix-shaper for the fallback cases.
245 // This is not allowed by the spec, but this code is tolerant to those cases
246 if (cmsGetPCS(hProfile) == cmsSigLabData) {
247
248 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocXYZ2Lab(ContextID)))
249 goto Error;
250 }
251
252 }
253
254 return Lut;
255
256 Error:
257 cmsPipelineFree(Lut);
258 return NULL;
259 }
260
261
262
263 // Read the DToAX tag, adjusting the encoding of Lab or XYZ if needed
264 static
_cmsReadFloatInputTag(cmsHPROFILE hProfile,cmsTagSignature tagFloat)265 cmsPipeline* _cmsReadFloatInputTag(cmsHPROFILE hProfile, cmsTagSignature tagFloat)
266 {
267 cmsContext ContextID = cmsGetProfileContextID(hProfile);
268 cmsPipeline* Lut = cmsPipelineDup((cmsPipeline*) cmsReadTag(hProfile, tagFloat));
269 cmsColorSpaceSignature spc = cmsGetColorSpace(hProfile);
270 cmsColorSpaceSignature PCS = cmsGetPCS(hProfile);
271
272 if (Lut == NULL) return NULL;
273
274 // input and output of transform are in lcms 0..1 encoding. If XYZ or Lab spaces are used,
275 // these need to be normalized into the appropriate ranges (Lab = 100,0,0, XYZ=1.0,1.0,1.0)
276 if ( spc == cmsSigLabData)
277 {
278 if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToLabFloat(ContextID)))
279 goto Error;
280 }
281 else if (spc == cmsSigXYZData)
282 {
283 if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToXyzFloat(ContextID)))
284 goto Error;
285 }
286
287 if ( PCS == cmsSigLabData)
288 {
289 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromLabFloat(ContextID)))
290 goto Error;
291 }
292 else if( PCS == cmsSigXYZData)
293 {
294 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromXyzFloat(ContextID)))
295 goto Error;
296 }
297
298 return Lut;
299
300 Error:
301 cmsPipelineFree(Lut);
302 return NULL;
303 }
304
305
306 // Read and create a BRAND NEW MPE LUT from a given profile. All stuff dependent of version, etc
307 // is adjusted here in order to create a LUT that takes care of all those details.
308 // We add intent = 0xffffffff as a way to read matrix shaper always, no matter of other LUT
_cmsReadInputLUT(cmsHPROFILE hProfile,cmsUInt32Number Intent)309 cmsPipeline* CMSEXPORT _cmsReadInputLUT(cmsHPROFILE hProfile, cmsUInt32Number Intent)
310 {
311 cmsTagTypeSignature OriginalType;
312 cmsTagSignature tag16;
313 cmsTagSignature tagFloat;
314 cmsContext ContextID = cmsGetProfileContextID(hProfile);
315
316 // On named color, take the appropriate tag
317 if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
318
319 cmsPipeline* Lut;
320 cmsNAMEDCOLORLIST* nc = (cmsNAMEDCOLORLIST*) cmsReadTag(hProfile, cmsSigNamedColor2Tag);
321
322 if (nc == NULL) return NULL;
323
324 Lut = cmsPipelineAlloc(ContextID, 0, 0);
325 if (Lut == NULL)
326 return NULL;
327
328 if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocNamedColor(nc, TRUE)) ||
329 !cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID))) {
330 cmsPipelineFree(Lut);
331 return NULL;
332 }
333 return Lut;
334 }
335
336 // This is an attempt to reuse this function to retrieve the matrix-shaper as pipeline no
337 // matter other LUT are present and have precedence. Intent = 0xffffffff can be used for that.
338 if (Intent <= INTENT_ABSOLUTE_COLORIMETRIC) {
339
340 tag16 = Device2PCS16[Intent];
341 tagFloat = Device2PCSFloat[Intent];
342
343 if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
344
345 // Floating point LUT are always V4, but the encoding range is no
346 // longer 0..1.0, so we need to add an stage depending on the color space
347 return _cmsReadFloatInputTag(hProfile, tagFloat);
348 }
349
350 // Revert to perceptual if no tag is found
351 if (!cmsIsTag(hProfile, tag16)) {
352 tag16 = Device2PCS16[0];
353 }
354
355 if (cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
356
357 // Check profile version and LUT type. Do the necessary adjustments if needed
358
359 // First read the tag
360 cmsPipeline* Lut = (cmsPipeline*) cmsReadTag(hProfile, tag16);
361 if (Lut == NULL) return NULL;
362
363 // After reading it, we have now info about the original type
364 OriginalType = _cmsGetTagTrueType(hProfile, tag16);
365
366 // The profile owns the Lut, so we need to copy it
367 Lut = cmsPipelineDup(Lut);
368
369 // We need to adjust data only for Lab16 on output
370 if (OriginalType != cmsSigLut16Type || cmsGetPCS(hProfile) != cmsSigLabData)
371 return Lut;
372
373 // If the input is Lab, add also a conversion at the begin
374 if (cmsGetColorSpace(hProfile) == cmsSigLabData &&
375 !cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID)))
376 goto Error;
377
378 // Add a matrix for conversion V2 to V4 Lab PCS
379 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
380 goto Error;
381
382 return Lut;
383 Error:
384 cmsPipelineFree(Lut);
385 return NULL;
386 }
387 }
388
389 // Lut was not found, try to create a matrix-shaper
390
391 // Check if this is a grayscale profile.
392 if (cmsGetColorSpace(hProfile) == cmsSigGrayData) {
393
394 // if so, build appropriate conversion tables.
395 // The tables are the PCS iluminant, scaled across GrayTRC
396 return BuildGrayInputMatrixPipeline(hProfile);
397 }
398
399 // Not gray, create a normal matrix-shaper
400 return BuildRGBInputMatrixShaper(hProfile);
401 }
402
403 // ---------------------------------------------------------------------------------------------------------------
404
405 // Gray output pipeline.
406 // XYZ -> Gray or Lab -> Gray. Since we only know the GrayTRC, we need to do some assumptions. Gray component will be
407 // given by Y on XYZ PCS and by L* on Lab PCS, Both across inverse TRC curve.
408 // The complete pipeline on XYZ is Matrix[3:1] -> Tone curve and in Lab Matrix[3:1] -> Tone Curve as well.
409
410 static
BuildGrayOutputPipeline(cmsHPROFILE hProfile)411 cmsPipeline* BuildGrayOutputPipeline(cmsHPROFILE hProfile)
412 {
413 cmsToneCurve *GrayTRC, *RevGrayTRC;
414 cmsPipeline* Lut;
415 cmsContext ContextID = cmsGetProfileContextID(hProfile);
416
417 GrayTRC = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGrayTRCTag);
418 if (GrayTRC == NULL) return NULL;
419
420 RevGrayTRC = cmsReverseToneCurve(GrayTRC);
421 if (RevGrayTRC == NULL) return NULL;
422
423 Lut = cmsPipelineAlloc(ContextID, 3, 1);
424 if (Lut == NULL) {
425 cmsFreeToneCurve(RevGrayTRC);
426 return NULL;
427 }
428
429 if (cmsGetPCS(hProfile) == cmsSigLabData) {
430
431 if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 1, 3, PickLstarMatrix, NULL)))
432 goto Error;
433 }
434 else {
435 if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 1, 3, PickYMatrix, NULL)))
436 goto Error;
437 }
438
439 if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 1, &RevGrayTRC)))
440 goto Error;
441
442 cmsFreeToneCurve(RevGrayTRC);
443 return Lut;
444
445 Error:
446 cmsFreeToneCurve(RevGrayTRC);
447 cmsPipelineFree(Lut);
448 return NULL;
449 }
450
451
452 static
BuildRGBOutputMatrixShaper(cmsHPROFILE hProfile)453 cmsPipeline* BuildRGBOutputMatrixShaper(cmsHPROFILE hProfile)
454 {
455 cmsPipeline* Lut;
456 cmsToneCurve *Shapes[3], *InvShapes[3];
457 cmsMAT3 Mat, Inv;
458 int i, j;
459 cmsContext ContextID = cmsGetProfileContextID(hProfile);
460
461 if (!ReadICCMatrixRGB2XYZ(&Mat, hProfile))
462 return NULL;
463
464 if (!_cmsMAT3inverse(&Mat, &Inv))
465 return NULL;
466
467 // XYZ PCS in encoded in 1.15 format, and the matrix input should come in 0..0xffff range, so
468 // we need to adjust the input by a << 1 to obtain a 1.16 fixed and then by a factor of
469 // (0xffff/0x10000) to put data in 0..0xffff range. Total factor is (2.0*65535.0)/65536.0;
470
471 for (i=0; i < 3; i++)
472 for (j=0; j < 3; j++)
473 Inv.v[i].n[j] *= OutpAdj;
474
475 Shapes[0] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigRedTRCTag);
476 Shapes[1] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGreenTRCTag);
477 Shapes[2] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigBlueTRCTag);
478
479 if (!Shapes[0] || !Shapes[1] || !Shapes[2])
480 return NULL;
481
482 InvShapes[0] = cmsReverseToneCurve(Shapes[0]);
483 InvShapes[1] = cmsReverseToneCurve(Shapes[1]);
484 InvShapes[2] = cmsReverseToneCurve(Shapes[2]);
485
486 if (!InvShapes[0] || !InvShapes[1] || !InvShapes[2]) {
487 return NULL;
488 }
489
490 Lut = cmsPipelineAlloc(ContextID, 3, 3);
491 if (Lut != NULL) {
492
493 // Note that it is certainly possible a single profile would have a LUT based
494 // tag for output working in lab and a matrix-shaper for the fallback cases.
495 // This is not allowed by the spec, but this code is tolerant to those cases
496 if (cmsGetPCS(hProfile) == cmsSigLabData) {
497
498 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLab2XYZ(ContextID)))
499 goto Error;
500 }
501
502 if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 3, (cmsFloat64Number*) &Inv, NULL)) ||
503 !cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 3, InvShapes)))
504 goto Error;
505 }
506
507 cmsFreeToneCurveTriple(InvShapes);
508 return Lut;
509 Error:
510 cmsFreeToneCurveTriple(InvShapes);
511 cmsPipelineFree(Lut);
512 return NULL;
513 }
514
515
516 // Change CLUT interpolation to trilinear
517 static
ChangeInterpolationToTrilinear(cmsPipeline * Lut)518 void ChangeInterpolationToTrilinear(cmsPipeline* Lut)
519 {
520 cmsStage* Stage;
521
522 for (Stage = cmsPipelineGetPtrToFirstStage(Lut);
523 Stage != NULL;
524 Stage = cmsStageNext(Stage)) {
525
526 if (cmsStageType(Stage) == cmsSigCLutElemType) {
527
528 _cmsStageCLutData* CLUT = (_cmsStageCLutData*) Stage ->Data;
529
530 CLUT ->Params->dwFlags |= CMS_LERP_FLAGS_TRILINEAR;
531 _cmsSetInterpolationRoutine(Lut->ContextID, CLUT ->Params);
532 }
533 }
534 }
535
536
537 // Read the DToAX tag, adjusting the encoding of Lab or XYZ if needed
538 static
_cmsReadFloatOutputTag(cmsHPROFILE hProfile,cmsTagSignature tagFloat)539 cmsPipeline* _cmsReadFloatOutputTag(cmsHPROFILE hProfile, cmsTagSignature tagFloat)
540 {
541 cmsContext ContextID = cmsGetProfileContextID(hProfile);
542 cmsPipeline* Lut = cmsPipelineDup((cmsPipeline*) cmsReadTag(hProfile, tagFloat));
543 cmsColorSpaceSignature PCS = cmsGetPCS(hProfile);
544 cmsColorSpaceSignature dataSpace = cmsGetColorSpace(hProfile);
545
546 if (Lut == NULL) return NULL;
547
548 // If PCS is Lab or XYZ, the floating point tag is accepting data in the space encoding,
549 // and since the formatter has already accommodated to 0..1.0, we should undo this change
550 if ( PCS == cmsSigLabData)
551 {
552 if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToLabFloat(ContextID)))
553 goto Error;
554 }
555 else
556 if (PCS == cmsSigXYZData)
557 {
558 if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToXyzFloat(ContextID)))
559 goto Error;
560 }
561
562 // the output can be Lab or XYZ, in which case normalisation is needed on the end of the pipeline
563 if ( dataSpace == cmsSigLabData)
564 {
565 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromLabFloat(ContextID)))
566 goto Error;
567 }
568 else if (dataSpace == cmsSigXYZData)
569 {
570 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromXyzFloat(ContextID)))
571 goto Error;
572 }
573
574 return Lut;
575
576 Error:
577 cmsPipelineFree(Lut);
578 return NULL;
579 }
580
581 // Create an output MPE LUT from agiven profile. Version mismatches are handled here
_cmsReadOutputLUT(cmsHPROFILE hProfile,cmsUInt32Number Intent)582 cmsPipeline* CMSEXPORT _cmsReadOutputLUT(cmsHPROFILE hProfile, cmsUInt32Number Intent)
583 {
584 cmsTagTypeSignature OriginalType;
585 cmsTagSignature tag16;
586 cmsTagSignature tagFloat;
587 cmsContext ContextID = cmsGetProfileContextID(hProfile);
588
589
590 if (Intent <= INTENT_ABSOLUTE_COLORIMETRIC) {
591
592 tag16 = PCS2Device16[Intent];
593 tagFloat = PCS2DeviceFloat[Intent];
594
595 if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
596
597 // Floating point LUT are always V4
598 return _cmsReadFloatOutputTag(hProfile, tagFloat);
599 }
600
601 // Revert to perceptual if no tag is found
602 if (!cmsIsTag(hProfile, tag16)) {
603 tag16 = PCS2Device16[0];
604 }
605
606 if (cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
607
608 // Check profile version and LUT type. Do the necessary adjustments if needed
609
610 // First read the tag
611 cmsPipeline* Lut = (cmsPipeline*) cmsReadTag(hProfile, tag16);
612 if (Lut == NULL) return NULL;
613
614 // After reading it, we have info about the original type
615 OriginalType = _cmsGetTagTrueType(hProfile, tag16);
616
617 // The profile owns the Lut, so we need to copy it
618 Lut = cmsPipelineDup(Lut);
619 if (Lut == NULL) return NULL;
620
621 // Now it is time for a controversial stuff. I found that for 3D LUTS using
622 // Lab used as indexer space, trilinear interpolation should be used
623 if (cmsGetPCS(hProfile) == cmsSigLabData)
624 ChangeInterpolationToTrilinear(Lut);
625
626 // We need to adjust data only for Lab and Lut16 type
627 if (OriginalType != cmsSigLut16Type || cmsGetPCS(hProfile) != cmsSigLabData)
628 return Lut;
629
630 // Add a matrix for conversion V4 to V2 Lab PCS
631 if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID)))
632 goto Error;
633
634 // If the output is Lab, add also a conversion at the end
635 if (cmsGetColorSpace(hProfile) == cmsSigLabData)
636 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
637 goto Error;
638
639 return Lut;
640 Error:
641 cmsPipelineFree(Lut);
642 return NULL;
643 }
644 }
645
646 // Lut not found, try to create a matrix-shaper
647
648 // Check if this is a grayscale profile.
649 if (cmsGetColorSpace(hProfile) == cmsSigGrayData) {
650
651 // if so, build appropriate conversion tables.
652 // The tables are the PCS iluminant, scaled across GrayTRC
653 return BuildGrayOutputPipeline(hProfile);
654 }
655
656 // Not gray, create a normal matrix-shaper, which only operates in XYZ space
657 return BuildRGBOutputMatrixShaper(hProfile);
658 }
659
660 // ---------------------------------------------------------------------------------------------------------------
661
662 // Read the AToD0 tag, adjusting the encoding of Lab or XYZ if needed
663 static
_cmsReadFloatDevicelinkTag(cmsHPROFILE hProfile,cmsTagSignature tagFloat)664 cmsPipeline* _cmsReadFloatDevicelinkTag(cmsHPROFILE hProfile, cmsTagSignature tagFloat)
665 {
666 cmsContext ContextID = cmsGetProfileContextID(hProfile);
667 cmsPipeline* Lut = cmsPipelineDup((cmsPipeline*)cmsReadTag(hProfile, tagFloat));
668 cmsColorSpaceSignature PCS = cmsGetPCS(hProfile);
669 cmsColorSpaceSignature spc = cmsGetColorSpace(hProfile);
670
671 if (Lut == NULL) return NULL;
672
673 if (spc == cmsSigLabData)
674 {
675 if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToLabFloat(ContextID)))
676 goto Error;
677 }
678 else
679 if (spc == cmsSigXYZData)
680 {
681 if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToXyzFloat(ContextID)))
682 goto Error;
683 }
684
685 if (PCS == cmsSigLabData)
686 {
687 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromLabFloat(ContextID)))
688 goto Error;
689 }
690 else
691 if (PCS == cmsSigXYZData)
692 {
693 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromXyzFloat(ContextID)))
694 goto Error;
695 }
696
697 return Lut;
698 Error:
699 cmsPipelineFree(Lut);
700 return NULL;
701 }
702
703 // This one includes abstract profiles as well. Matrix-shaper cannot be obtained on that device class. The
704 // tag name here may default to AToB0
_cmsReadDevicelinkLUT(cmsHPROFILE hProfile,cmsUInt32Number Intent)705 cmsPipeline* CMSEXPORT _cmsReadDevicelinkLUT(cmsHPROFILE hProfile, cmsUInt32Number Intent)
706 {
707 cmsPipeline* Lut;
708 cmsTagTypeSignature OriginalType;
709 cmsTagSignature tag16;
710 cmsTagSignature tagFloat;
711 cmsContext ContextID = cmsGetProfileContextID(hProfile);
712
713
714 if (Intent > INTENT_ABSOLUTE_COLORIMETRIC)
715 return NULL;
716
717 tag16 = Device2PCS16[Intent];
718 tagFloat = Device2PCSFloat[Intent];
719
720 // On named color, take the appropriate tag
721 if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
722
723 cmsNAMEDCOLORLIST* nc = (cmsNAMEDCOLORLIST*)cmsReadTag(hProfile, cmsSigNamedColor2Tag);
724
725 if (nc == NULL) return NULL;
726
727 Lut = cmsPipelineAlloc(ContextID, 0, 0);
728 if (Lut == NULL)
729 goto Error;
730
731 if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocNamedColor(nc, FALSE)))
732 goto Error;
733
734 if (cmsGetColorSpace(hProfile) == cmsSigLabData)
735 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
736 goto Error;
737
738 return Lut;
739 Error:
740 cmsPipelineFree(Lut);
741 return NULL;
742 }
743
744
745 if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
746
747 // Floating point LUT are always V
748 return _cmsReadFloatDevicelinkTag(hProfile, tagFloat);
749 }
750
751 tagFloat = Device2PCSFloat[0];
752 if (cmsIsTag(hProfile, tagFloat)) {
753
754 return cmsPipelineDup((cmsPipeline*)cmsReadTag(hProfile, tagFloat));
755 }
756
757 if (!cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
758
759 tag16 = Device2PCS16[0];
760 if (!cmsIsTag(hProfile, tag16)) return NULL;
761 }
762
763 // Check profile version and LUT type. Do the necessary adjustments if needed
764
765 // Read the tag
766 Lut = (cmsPipeline*)cmsReadTag(hProfile, tag16);
767 if (Lut == NULL) return NULL;
768
769 // The profile owns the Lut, so we need to copy it
770 Lut = cmsPipelineDup(Lut);
771 if (Lut == NULL) return NULL;
772
773 // Now it is time for a controversial stuff. I found that for 3D LUTS using
774 // Lab used as indexer space, trilinear interpolation should be used
775 if (cmsGetPCS(hProfile) == cmsSigLabData)
776 ChangeInterpolationToTrilinear(Lut);
777
778 // After reading it, we have info about the original type
779 OriginalType = _cmsGetTagTrueType(hProfile, tag16);
780
781 // We need to adjust data for Lab16 on output
782 if (OriginalType != cmsSigLut16Type) return Lut;
783
784 // Here it is possible to get Lab on both sides
785
786 if (cmsGetColorSpace(hProfile) == cmsSigLabData) {
787 if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID)))
788 goto Error2;
789 }
790
791 if (cmsGetPCS(hProfile) == cmsSigLabData) {
792 if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
793 goto Error2;
794 }
795
796 return Lut;
797
798 Error2:
799 cmsPipelineFree(Lut);
800 return NULL;
801 }
802
803 // ---------------------------------------------------------------------------------------------------------------
804
805 // Returns TRUE if the profile is implemented as matrix-shaper
cmsIsMatrixShaper(cmsHPROFILE hProfile)806 cmsBool CMSEXPORT cmsIsMatrixShaper(cmsHPROFILE hProfile)
807 {
808 switch (cmsGetColorSpace(hProfile)) {
809
810 case cmsSigGrayData:
811
812 return cmsIsTag(hProfile, cmsSigGrayTRCTag);
813
814 case cmsSigRgbData:
815
816 return (cmsIsTag(hProfile, cmsSigRedColorantTag) &&
817 cmsIsTag(hProfile, cmsSigGreenColorantTag) &&
818 cmsIsTag(hProfile, cmsSigBlueColorantTag) &&
819 cmsIsTag(hProfile, cmsSigRedTRCTag) &&
820 cmsIsTag(hProfile, cmsSigGreenTRCTag) &&
821 cmsIsTag(hProfile, cmsSigBlueTRCTag));
822
823 default:
824
825 return FALSE;
826 }
827 }
828
829 // Returns TRUE if the intent is implemented as CLUT
cmsIsCLUT(cmsHPROFILE hProfile,cmsUInt32Number Intent,cmsUInt32Number UsedDirection)830 cmsBool CMSEXPORT cmsIsCLUT(cmsHPROFILE hProfile, cmsUInt32Number Intent, cmsUInt32Number UsedDirection)
831 {
832 const cmsTagSignature* TagTable;
833
834 // For devicelinks, the supported intent is that one stated in the header
835 if (cmsGetDeviceClass(hProfile) == cmsSigLinkClass) {
836 return (cmsGetHeaderRenderingIntent(hProfile) == Intent);
837 }
838
839 switch (UsedDirection) {
840
841 case LCMS_USED_AS_INPUT: TagTable = Device2PCS16; break;
842 case LCMS_USED_AS_OUTPUT:TagTable = PCS2Device16; break;
843
844 // For proofing, we need rel. colorimetric in output. Let's do some recursion
845 case LCMS_USED_AS_PROOF:
846 return cmsIsIntentSupported(hProfile, Intent, LCMS_USED_AS_INPUT) &&
847 cmsIsIntentSupported(hProfile, INTENT_RELATIVE_COLORIMETRIC, LCMS_USED_AS_OUTPUT);
848
849 default:
850 cmsSignalError(cmsGetProfileContextID(hProfile), cmsERROR_RANGE, "Unexpected direction (%d)", UsedDirection);
851 return FALSE;
852 }
853
854 // Extended intents are not strictly CLUT-based
855 if (Intent > INTENT_ABSOLUTE_COLORIMETRIC)
856 return FALSE;
857
858 return cmsIsTag(hProfile, TagTable[Intent]);
859
860 }
861
862
863 // Return info about supported intents
cmsIsIntentSupported(cmsHPROFILE hProfile,cmsUInt32Number Intent,cmsUInt32Number UsedDirection)864 cmsBool CMSEXPORT cmsIsIntentSupported(cmsHPROFILE hProfile,
865 cmsUInt32Number Intent, cmsUInt32Number UsedDirection)
866 {
867
868 if (cmsIsCLUT(hProfile, Intent, UsedDirection)) return TRUE;
869
870 // Is there any matrix-shaper? If so, the intent is supported. This is a bit odd, since V2 matrix shaper
871 // does not fully support relative colorimetric because they cannot deal with non-zero black points, but
872 // many profiles claims that, and this is certainly not true for V4 profiles. Lets answer "yes" no matter
873 // the accuracy would be less than optimal in rel.col and v2 case.
874
875 return cmsIsMatrixShaper(hProfile);
876 }
877
878
879 // ---------------------------------------------------------------------------------------------------------------
880
881 // Read both, profile sequence description and profile sequence id if present. Then combine both to
882 // create qa unique structure holding both. Shame on ICC to store things in such complicated way.
_cmsReadProfileSequence(cmsHPROFILE hProfile)883 cmsSEQ* _cmsReadProfileSequence(cmsHPROFILE hProfile)
884 {
885 cmsSEQ* ProfileSeq;
886 cmsSEQ* ProfileId;
887 cmsSEQ* NewSeq;
888 cmsUInt32Number i;
889
890 // Take profile sequence description first
891 ProfileSeq = (cmsSEQ*) cmsReadTag(hProfile, cmsSigProfileSequenceDescTag);
892
893 // Take profile sequence ID
894 ProfileId = (cmsSEQ*) cmsReadTag(hProfile, cmsSigProfileSequenceIdTag);
895
896 if (ProfileSeq == NULL && ProfileId == NULL) return NULL;
897
898 if (ProfileSeq == NULL) return cmsDupProfileSequenceDescription(ProfileId);
899 if (ProfileId == NULL) return cmsDupProfileSequenceDescription(ProfileSeq);
900
901 // We have to mix both together. For that they must agree
902 if (ProfileSeq ->n != ProfileId ->n) return cmsDupProfileSequenceDescription(ProfileSeq);
903
904 NewSeq = cmsDupProfileSequenceDescription(ProfileSeq);
905
906 // Ok, proceed to the mixing
907 if (NewSeq != NULL) {
908 for (i=0; i < ProfileSeq ->n; i++) {
909
910 memmove(&NewSeq ->seq[i].ProfileID, &ProfileId ->seq[i].ProfileID, sizeof(cmsProfileID));
911 NewSeq ->seq[i].Description = cmsMLUdup(ProfileId ->seq[i].Description);
912 }
913 }
914 return NewSeq;
915 }
916
917 // Dump the contents of profile sequence in both tags (if v4 available)
_cmsWriteProfileSequence(cmsHPROFILE hProfile,const cmsSEQ * seq)918 cmsBool _cmsWriteProfileSequence(cmsHPROFILE hProfile, const cmsSEQ* seq)
919 {
920 if (!cmsWriteTag(hProfile, cmsSigProfileSequenceDescTag, seq)) return FALSE;
921
922 if (cmsGetEncodedICCversion(hProfile) >= 0x4000000) {
923
924 if (!cmsWriteTag(hProfile, cmsSigProfileSequenceIdTag, seq)) return FALSE;
925 }
926
927 return TRUE;
928 }
929
930
931 // Auxiliary, read and duplicate a MLU if found.
932 static
GetMLUFromProfile(cmsHPROFILE h,cmsTagSignature sig)933 cmsMLU* GetMLUFromProfile(cmsHPROFILE h, cmsTagSignature sig)
934 {
935 cmsMLU* mlu = (cmsMLU*) cmsReadTag(h, sig);
936 if (mlu == NULL) return NULL;
937
938 return cmsMLUdup(mlu);
939 }
940
941 // Create a sequence description out of an array of profiles
_cmsCompileProfileSequence(cmsContext ContextID,cmsUInt32Number nProfiles,cmsHPROFILE hProfiles[])942 cmsSEQ* _cmsCompileProfileSequence(cmsContext ContextID, cmsUInt32Number nProfiles, cmsHPROFILE hProfiles[])
943 {
944 cmsUInt32Number i;
945 cmsSEQ* seq = cmsAllocProfileSequenceDescription(ContextID, nProfiles);
946
947 if (seq == NULL) return NULL;
948
949 for (i=0; i < nProfiles; i++) {
950
951 cmsPSEQDESC* ps = &seq ->seq[i];
952 cmsHPROFILE h = hProfiles[i];
953 cmsTechnologySignature* techpt;
954
955 cmsGetHeaderAttributes(h, &ps ->attributes);
956 cmsGetHeaderProfileID(h, ps ->ProfileID.ID8);
957 ps ->deviceMfg = cmsGetHeaderManufacturer(h);
958 ps ->deviceModel = cmsGetHeaderModel(h);
959
960 techpt = (cmsTechnologySignature*) cmsReadTag(h, cmsSigTechnologyTag);
961 if (techpt == NULL)
962 ps ->technology = (cmsTechnologySignature) 0;
963 else
964 ps ->technology = *techpt;
965
966 ps ->Manufacturer = GetMLUFromProfile(h, cmsSigDeviceMfgDescTag);
967 ps ->Model = GetMLUFromProfile(h, cmsSigDeviceModelDescTag);
968 ps ->Description = GetMLUFromProfile(h, cmsSigProfileDescriptionTag);
969
970 }
971
972 return seq;
973 }
974
975 // -------------------------------------------------------------------------------------------------------------------
976
977
978 static
GetInfo(cmsHPROFILE hProfile,cmsInfoType Info)979 const cmsMLU* GetInfo(cmsHPROFILE hProfile, cmsInfoType Info)
980 {
981 cmsTagSignature sig;
982
983 switch (Info) {
984
985 case cmsInfoDescription:
986 sig = cmsSigProfileDescriptionTag;
987 break;
988
989 case cmsInfoManufacturer:
990 sig = cmsSigDeviceMfgDescTag;
991 break;
992
993 case cmsInfoModel:
994 sig = cmsSigDeviceModelDescTag;
995 break;
996
997 case cmsInfoCopyright:
998 sig = cmsSigCopyrightTag;
999 break;
1000
1001 default: return NULL;
1002 }
1003
1004
1005 return (cmsMLU*) cmsReadTag(hProfile, sig);
1006 }
1007
1008
1009
cmsGetProfileInfo(cmsHPROFILE hProfile,cmsInfoType Info,const char LanguageCode[3],const char CountryCode[3],wchar_t * Buffer,cmsUInt32Number BufferSize)1010 cmsUInt32Number CMSEXPORT cmsGetProfileInfo(cmsHPROFILE hProfile, cmsInfoType Info,
1011 const char LanguageCode[3], const char CountryCode[3],
1012 wchar_t* Buffer, cmsUInt32Number BufferSize)
1013 {
1014 const cmsMLU* mlu = GetInfo(hProfile, Info);
1015 if (mlu == NULL) return 0;
1016
1017 return cmsMLUgetWide(mlu, LanguageCode, CountryCode, Buffer, BufferSize);
1018 }
1019
1020
cmsGetProfileInfoASCII(cmsHPROFILE hProfile,cmsInfoType Info,const char LanguageCode[3],const char CountryCode[3],char * Buffer,cmsUInt32Number BufferSize)1021 cmsUInt32Number CMSEXPORT cmsGetProfileInfoASCII(cmsHPROFILE hProfile, cmsInfoType Info,
1022 const char LanguageCode[3], const char CountryCode[3],
1023 char* Buffer, cmsUInt32Number BufferSize)
1024 {
1025 const cmsMLU* mlu = GetInfo(hProfile, Info);
1026 if (mlu == NULL) return 0;
1027
1028 return cmsMLUgetASCII(mlu, LanguageCode, CountryCode, Buffer, BufferSize);
1029 }
1030