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 // Link several profiles to obtain a single LUT modelling the whole color transform. Intents, Black point
60 // compensation and Adaptation parameters may vary across profiles. BPC and Adaptation refers to the PCS
61 // after the profile. I.e, BPC[0] refers to connexion between profile(0) and profile(1)
62 cmsPipeline* _cmsLinkProfiles(cmsContext ContextID,
63 cmsUInt32Number nProfiles,
64 cmsUInt32Number Intents[],
65 cmsHPROFILE hProfiles[],
66 cmsBool BPC[],
67 cmsFloat64Number AdaptationStates[],
68 cmsUInt32Number dwFlags);
69
70 //---------------------------------------------------------------------------------
71
72 // This is the default routine for ICC-style intents. A user may decide to override it by using a plugin.
73 // Supported intents are perceptual, relative colorimetric, saturation and ICC-absolute colorimetric
74 static
75 cmsPipeline* DefaultICCintents(cmsContext ContextID,
76 cmsUInt32Number nProfiles,
77 cmsUInt32Number Intents[],
78 cmsHPROFILE hProfiles[],
79 cmsBool BPC[],
80 cmsFloat64Number AdaptationStates[],
81 cmsUInt32Number dwFlags);
82
83 //---------------------------------------------------------------------------------
84
85 // This is the entry for black-preserving K-only intents, which are non-ICC. Last profile have to be a output profile
86 // to do the trick (no devicelinks allowed at that position)
87 static
88 cmsPipeline* BlackPreservingKOnlyIntents(cmsContext ContextID,
89 cmsUInt32Number nProfiles,
90 cmsUInt32Number Intents[],
91 cmsHPROFILE hProfiles[],
92 cmsBool BPC[],
93 cmsFloat64Number AdaptationStates[],
94 cmsUInt32Number dwFlags);
95
96 //---------------------------------------------------------------------------------
97
98 // This is the entry for black-plane preserving, which are non-ICC. Again, Last profile have to be a output profile
99 // to do the trick (no devicelinks allowed at that position)
100 static
101 cmsPipeline* BlackPreservingKPlaneIntents(cmsContext ContextID,
102 cmsUInt32Number nProfiles,
103 cmsUInt32Number Intents[],
104 cmsHPROFILE hProfiles[],
105 cmsBool BPC[],
106 cmsFloat64Number AdaptationStates[],
107 cmsUInt32Number dwFlags);
108
109 //---------------------------------------------------------------------------------
110
111
112 // This is a structure holding implementations for all supported intents.
113 typedef struct _cms_intents_list {
114
115 cmsUInt32Number Intent;
116 char Description[256];
117 cmsIntentFn Link;
118 struct _cms_intents_list* Next;
119
120 } cmsIntentsList;
121
122
123 // Built-in intents
124 static cmsIntentsList DefaultIntents[] = {
125
126 { INTENT_PERCEPTUAL, "Perceptual", DefaultICCintents, &DefaultIntents[1] },
127 { INTENT_RELATIVE_COLORIMETRIC, "Relative colorimetric", DefaultICCintents, &DefaultIntents[2] },
128 { INTENT_SATURATION, "Saturation", DefaultICCintents, &DefaultIntents[3] },
129 { INTENT_ABSOLUTE_COLORIMETRIC, "Absolute colorimetric", DefaultICCintents, &DefaultIntents[4] },
130 { INTENT_PRESERVE_K_ONLY_PERCEPTUAL, "Perceptual preserving black ink", BlackPreservingKOnlyIntents, &DefaultIntents[5] },
131 { INTENT_PRESERVE_K_ONLY_RELATIVE_COLORIMETRIC, "Relative colorimetric preserving black ink", BlackPreservingKOnlyIntents, &DefaultIntents[6] },
132 { INTENT_PRESERVE_K_ONLY_SATURATION, "Saturation preserving black ink", BlackPreservingKOnlyIntents, &DefaultIntents[7] },
133 { INTENT_PRESERVE_K_PLANE_PERCEPTUAL, "Perceptual preserving black plane", BlackPreservingKPlaneIntents, &DefaultIntents[8] },
134 { INTENT_PRESERVE_K_PLANE_RELATIVE_COLORIMETRIC,"Relative colorimetric preserving black plane", BlackPreservingKPlaneIntents, &DefaultIntents[9] },
135 { INTENT_PRESERVE_K_PLANE_SATURATION, "Saturation preserving black plane", BlackPreservingKPlaneIntents, NULL }
136 };
137
138
139 // A pointer to the begining of the list
140 _cmsIntentsPluginChunkType _cmsIntentsPluginChunk = { NULL };
141
142 // Duplicates the zone of memory used by the plug-in in the new context
143 static
144 void DupPluginIntentsList(struct _cmsContext_struct* ctx,
145 const struct _cmsContext_struct* src)
146 {
147 _cmsIntentsPluginChunkType newHead = { NULL };
148 cmsIntentsList* entry;
149 cmsIntentsList* Anterior = NULL;
150 _cmsIntentsPluginChunkType* head = (_cmsIntentsPluginChunkType*) src->chunks[IntentPlugin];
151
152 // Walk the list copying all nodes
153 for (entry = head->Intents;
154 entry != NULL;
155 entry = entry ->Next) {
156
157 cmsIntentsList *newEntry = ( cmsIntentsList *) _cmsSubAllocDup(ctx ->MemPool, entry, sizeof(cmsIntentsList));
158
159 if (newEntry == NULL)
160 return;
161
162 // We want to keep the linked list order, so this is a little bit tricky
163 newEntry -> Next = NULL;
164 if (Anterior)
165 Anterior -> Next = newEntry;
166
167 Anterior = newEntry;
168
169 if (newHead.Intents == NULL)
170 newHead.Intents = newEntry;
171 }
172
173 ctx ->chunks[IntentPlugin] = _cmsSubAllocDup(ctx->MemPool, &newHead, sizeof(_cmsIntentsPluginChunkType));
174 }
175
176 void _cmsAllocIntentsPluginChunk(struct _cmsContext_struct* ctx,
177 const struct _cmsContext_struct* src)
178 {
179 if (src != NULL) {
180
181 // Copy all linked list
182 DupPluginIntentsList(ctx, src);
183 }
184 else {
185 static _cmsIntentsPluginChunkType IntentsPluginChunkType = { NULL };
186 ctx ->chunks[IntentPlugin] = _cmsSubAllocDup(ctx ->MemPool, &IntentsPluginChunkType, sizeof(_cmsIntentsPluginChunkType));
187 }
188 }
189
190
191 // Search the list for a suitable intent. Returns NULL if not found
192 static
193 cmsIntentsList* SearchIntent(cmsContext ContextID, cmsUInt32Number Intent)
194 {
195 _cmsIntentsPluginChunkType* ctx = ( _cmsIntentsPluginChunkType*) _cmsContextGetClientChunk(ContextID, IntentPlugin);
196 cmsIntentsList* pt;
197
198 for (pt = ctx -> Intents; pt != NULL; pt = pt -> Next)
199 if (pt ->Intent == Intent) return pt;
200
201 for (pt = DefaultIntents; pt != NULL; pt = pt -> Next)
202 if (pt ->Intent == Intent) return pt;
203
204 return NULL;
205 }
206
207 // Black point compensation. Implemented as a linear scaling in XYZ. Black points
208 // should come relative to the white point. Fills an matrix/offset element m
209 // which is organized as a 4x4 matrix.
210 static
211 void ComputeBlackPointCompensation(const cmsCIEXYZ* BlackPointIn,
212 const cmsCIEXYZ* BlackPointOut,
213 cmsMAT3* m, cmsVEC3* off)
214 {
215 cmsFloat64Number ax, ay, az, bx, by, bz, tx, ty, tz;
216
217 // Now we need to compute a matrix plus an offset m and of such of
218 // [m]*bpin + off = bpout
219 // [m]*D50 + off = D50
220 //
221 // This is a linear scaling in the form ax+b, where
222 // a = (bpout - D50) / (bpin - D50)
223 // b = - D50* (bpout - bpin) / (bpin - D50)
224
225 tx = BlackPointIn->X - cmsD50_XYZ()->X;
226 ty = BlackPointIn->Y - cmsD50_XYZ()->Y;
227 tz = BlackPointIn->Z - cmsD50_XYZ()->Z;
228
229 ax = (BlackPointOut->X - cmsD50_XYZ()->X) / tx;
230 ay = (BlackPointOut->Y - cmsD50_XYZ()->Y) / ty;
231 az = (BlackPointOut->Z - cmsD50_XYZ()->Z) / tz;
232
233 bx = - cmsD50_XYZ()-> X * (BlackPointOut->X - BlackPointIn->X) / tx;
234 by = - cmsD50_XYZ()-> Y * (BlackPointOut->Y - BlackPointIn->Y) / ty;
235 bz = - cmsD50_XYZ()-> Z * (BlackPointOut->Z - BlackPointIn->Z) / tz;
236
237 _cmsVEC3init(&m ->v[0], ax, 0, 0);
238 _cmsVEC3init(&m ->v[1], 0, ay, 0);
239 _cmsVEC3init(&m ->v[2], 0, 0, az);
240 _cmsVEC3init(off, bx, by, bz);
241
242 }
243
244
245 // Approximate a blackbody illuminant based on CHAD information
246 static
247 cmsFloat64Number CHAD2Temp(const cmsMAT3* Chad)
248 {
249 // Convert D50 across inverse CHAD to get the absolute white point
250 cmsVEC3 d, s;
251 cmsCIEXYZ Dest;
252 cmsCIExyY DestChromaticity;
253 cmsFloat64Number TempK;
254 cmsMAT3 m1, m2;
255
256 m1 = *Chad;
257 if (!_cmsMAT3inverse(&m1, &m2)) return FALSE;
258
259 s.n[VX] = cmsD50_XYZ() -> X;
260 s.n[VY] = cmsD50_XYZ() -> Y;
261 s.n[VZ] = cmsD50_XYZ() -> Z;
262
263 _cmsMAT3eval(&d, &m2, &s);
264
265 Dest.X = d.n[VX];
266 Dest.Y = d.n[VY];
267 Dest.Z = d.n[VZ];
268
269 cmsXYZ2xyY(&DestChromaticity, &Dest);
270
271 if (!cmsTempFromWhitePoint(&TempK, &DestChromaticity))
272 return -1.0;
273
274 return TempK;
275 }
276
277 // Compute a CHAD based on a given temperature
278 static
279 void Temp2CHAD(cmsMAT3* Chad, cmsFloat64Number Temp)
280 {
281 cmsCIEXYZ White;
282 cmsCIExyY ChromaticityOfWhite;
283
284 cmsWhitePointFromTemp(&ChromaticityOfWhite, Temp);
285 cmsxyY2XYZ(&White, &ChromaticityOfWhite);
286 _cmsAdaptationMatrix(Chad, NULL, &White, cmsD50_XYZ());
287 }
288
289 // Join scalings to obtain relative input to absolute and then to relative output.
290 // Result is stored in a 3x3 matrix
291 static
292 cmsBool ComputeAbsoluteIntent(cmsFloat64Number AdaptationState,
293 const cmsCIEXYZ* WhitePointIn,
294 const cmsMAT3* ChromaticAdaptationMatrixIn,
295 const cmsCIEXYZ* WhitePointOut,
296 const cmsMAT3* ChromaticAdaptationMatrixOut,
297 cmsMAT3* m)
298 {
299 cmsMAT3 Scale, m1, m2, m3, m4;
300
301 // TODO: Follow Marc Mahy's recommendation to check if CHAD is same by using M1*M2 == M2*M1. If so, do nothing.
302
303 // Adaptation state
304 if (AdaptationState == 1.0) {
305
306 // Observer is fully adapted. Keep chromatic adaptation.
307 // That is the standard V4 behaviour
308 _cmsVEC3init(&m->v[0], WhitePointIn->X / WhitePointOut->X, 0, 0);
309 _cmsVEC3init(&m->v[1], 0, WhitePointIn->Y / WhitePointOut->Y, 0);
310 _cmsVEC3init(&m->v[2], 0, 0, WhitePointIn->Z / WhitePointOut->Z);
311
312 }
313 else {
314
315 // Incomplete adaptation. This is an advanced feature.
316 _cmsVEC3init(&Scale.v[0], WhitePointIn->X / WhitePointOut->X, 0, 0);
317 _cmsVEC3init(&Scale.v[1], 0, WhitePointIn->Y / WhitePointOut->Y, 0);
318 _cmsVEC3init(&Scale.v[2], 0, 0, WhitePointIn->Z / WhitePointOut->Z);
319
320
321 if (AdaptationState == 0.0) {
322
323 m1 = *ChromaticAdaptationMatrixOut;
324 _cmsMAT3per(&m2, &m1, &Scale);
325 // m2 holds CHAD from output white to D50 times abs. col. scaling
326
327 // Observer is not adapted, undo the chromatic adaptation
328 _cmsMAT3per(m, &m2, ChromaticAdaptationMatrixOut);
329
330 m3 = *ChromaticAdaptationMatrixIn;
331 if (!_cmsMAT3inverse(&m3, &m4)) return FALSE;
332 _cmsMAT3per(m, &m2, &m4);
333
334 } else {
335
336 cmsMAT3 MixedCHAD;
337 cmsFloat64Number TempSrc, TempDest, Temp;
338
339 m1 = *ChromaticAdaptationMatrixIn;
340 if (!_cmsMAT3inverse(&m1, &m2)) return FALSE;
341 _cmsMAT3per(&m3, &m2, &Scale);
342 // m3 holds CHAD from input white to D50 times abs. col. scaling
343
344 TempSrc = CHAD2Temp(ChromaticAdaptationMatrixIn);
345 TempDest = CHAD2Temp(ChromaticAdaptationMatrixOut);
346
347 if (TempSrc < 0.0 || TempDest < 0.0) return FALSE; // Something went wrong
348
349 if (_cmsMAT3isIdentity(&Scale) && fabs(TempSrc - TempDest) < 0.01) {
350
351 _cmsMAT3identity(m);
352 return TRUE;
353 }
354
355 Temp = (1.0 - AdaptationState) * TempDest + AdaptationState * TempSrc;
356
357 // Get a CHAD from whatever output temperature to D50. This replaces output CHAD
358 Temp2CHAD(&MixedCHAD, Temp);
359
360 _cmsMAT3per(m, &m3, &MixedCHAD);
361 }
362
363 }
364 return TRUE;
365
366 }
367
368 // Just to see if m matrix should be applied
369 static
370 cmsBool IsEmptyLayer(cmsMAT3* m, cmsVEC3* off)
371 {
372 cmsFloat64Number diff = 0;
373 cmsMAT3 Ident;
374 int i;
375
376 if (m == NULL && off == NULL) return TRUE; // NULL is allowed as an empty layer
377 if (m == NULL && off != NULL) return FALSE; // This is an internal error
378
379 _cmsMAT3identity(&Ident);
380
381 for (i=0; i < 3*3; i++)
382 diff += fabs(((cmsFloat64Number*)m)[i] - ((cmsFloat64Number*)&Ident)[i]);
383
384 for (i=0; i < 3; i++)
385 diff += fabs(((cmsFloat64Number*)off)[i]);
386
387
388 return (diff < 0.002);
389 }
390
391
392 // Compute the conversion layer
393 static
394 cmsBool ComputeConversion(int i, cmsHPROFILE hProfiles[],
395 cmsUInt32Number Intent,
396 cmsBool BPC,
397 cmsFloat64Number AdaptationState,
398 cmsMAT3* m, cmsVEC3* off)
399 {
400
401 int k;
402
403 // m and off are set to identity and this is detected latter on
404 _cmsMAT3identity(m);
405 _cmsVEC3init(off, 0, 0, 0);
406
407 // If intent is abs. colorimetric,
408 if (Intent == INTENT_ABSOLUTE_COLORIMETRIC) {
409
410 cmsCIEXYZ WhitePointIn, WhitePointOut;
411 cmsMAT3 ChromaticAdaptationMatrixIn, ChromaticAdaptationMatrixOut;
412
413 _cmsReadMediaWhitePoint(&WhitePointIn, hProfiles[i-1]);
414 _cmsReadCHAD(&ChromaticAdaptationMatrixIn, hProfiles[i-1]);
415
416 _cmsReadMediaWhitePoint(&WhitePointOut, hProfiles[i]);
417 _cmsReadCHAD(&ChromaticAdaptationMatrixOut, hProfiles[i]);
418
419 if (!ComputeAbsoluteIntent(AdaptationState,
420 &WhitePointIn, &ChromaticAdaptationMatrixIn,
421 &WhitePointOut, &ChromaticAdaptationMatrixOut, m)) return FALSE;
422
423 }
424 else {
425 // Rest of intents may apply BPC.
426
427 if (BPC) {
428
429 cmsCIEXYZ BlackPointIn, BlackPointOut;
430
431 cmsDetectBlackPoint(&BlackPointIn, hProfiles[i-1], Intent, 0);
432 cmsDetectDestinationBlackPoint(&BlackPointOut, hProfiles[i], Intent, 0);
433
434 // If black points are equal, then do nothing
435 if (BlackPointIn.X != BlackPointOut.X ||
436 BlackPointIn.Y != BlackPointOut.Y ||
437 BlackPointIn.Z != BlackPointOut.Z)
438 ComputeBlackPointCompensation(&BlackPointIn, &BlackPointOut, m, off);
439 }
440 }
441
442 // Offset should be adjusted because the encoding. We encode XYZ normalized to 0..1.0,
443 // to do that, we divide by MAX_ENCODEABLE_XZY. The conversion stage goes XYZ -> XYZ so
444 // we have first to convert from encoded to XYZ and then convert back to encoded.
445 // y = Mx + Off
446 // x = x'c
447 // y = M x'c + Off
448 // y = y'c; y' = y / c
449 // y' = (Mx'c + Off) /c = Mx' + (Off / c)
450
451 for (k=0; k < 3; k++) {
452 off ->n[k] /= MAX_ENCODEABLE_XYZ;
453 }
454
455 return TRUE;
456 }
457
458
459 // Add a conversion stage if needed. If a matrix/offset m is given, it applies to XYZ space
460 static
461 cmsBool AddConversion(cmsPipeline* Result, cmsColorSpaceSignature InPCS, cmsColorSpaceSignature OutPCS, cmsMAT3* m, cmsVEC3* off)
462 {
463 cmsFloat64Number* m_as_dbl = (cmsFloat64Number*) m;
464 cmsFloat64Number* off_as_dbl = (cmsFloat64Number*) off;
465
466 // Handle PCS mismatches. A specialized stage is added to the LUT in such case
467 switch (InPCS) {
468
469 case cmsSigXYZData: // Input profile operates in XYZ
470
471 switch (OutPCS) {
472
473 case cmsSigXYZData: // XYZ -> XYZ
474 if (!IsEmptyLayer(m, off) &&
475 !cmsPipelineInsertStage(Result, cmsAT_END, cmsStageAllocMatrix(Result ->ContextID, 3, 3, m_as_dbl, off_as_dbl)))
476 return FALSE;
477 break;
478
479 case cmsSigLabData: // XYZ -> Lab
480 if (!IsEmptyLayer(m, off) &&
481 !cmsPipelineInsertStage(Result, cmsAT_END, cmsStageAllocMatrix(Result ->ContextID, 3, 3, m_as_dbl, off_as_dbl)))
482 return FALSE;
483 if (!cmsPipelineInsertStage(Result, cmsAT_END, _cmsStageAllocXYZ2Lab(Result ->ContextID)))
484 return FALSE;
485 break;
486
487 default:
488 return FALSE; // Colorspace mismatch
489 }
490 break;
491
492 case cmsSigLabData: // Input profile operates in Lab
493
494 switch (OutPCS) {
495
496 case cmsSigXYZData: // Lab -> XYZ
497
498 if (!cmsPipelineInsertStage(Result, cmsAT_END, _cmsStageAllocLab2XYZ(Result ->ContextID)))
499 return FALSE;
500 if (!IsEmptyLayer(m, off) &&
501 !cmsPipelineInsertStage(Result, cmsAT_END, cmsStageAllocMatrix(Result ->ContextID, 3, 3, m_as_dbl, off_as_dbl)))
502 return FALSE;
503 break;
504
505 case cmsSigLabData: // Lab -> Lab
506
507 if (!IsEmptyLayer(m, off)) {
508 if (!cmsPipelineInsertStage(Result, cmsAT_END, _cmsStageAllocLab2XYZ(Result ->ContextID)) ||
509 !cmsPipelineInsertStage(Result, cmsAT_END, cmsStageAllocMatrix(Result ->ContextID, 3, 3, m_as_dbl, off_as_dbl)) ||
510 !cmsPipelineInsertStage(Result, cmsAT_END, _cmsStageAllocXYZ2Lab(Result ->ContextID)))
511 return FALSE;
512 }
513 break;
514
515 default:
516 return FALSE; // Mismatch
517 }
518 break;
519
520 // On colorspaces other than PCS, check for same space
521 default:
522 if (InPCS != OutPCS) return FALSE;
523 break;
524 }
525
526 return TRUE;
527 }
528
529
530 // Is a given space compatible with another?
531 static
532 cmsBool ColorSpaceIsCompatible(cmsColorSpaceSignature a, cmsColorSpaceSignature b)
533 {
534 // If they are same, they are compatible.
535 if (a == b) return TRUE;
536
537 // Check for MCH4 substitution of CMYK
538 if ((a == cmsSig4colorData) && (b == cmsSigCmykData)) return TRUE;
539 if ((a == cmsSigCmykData) && (b == cmsSig4colorData)) return TRUE;
540
541 // Check for XYZ/Lab. Those spaces are interchangeable as they can be computed one from other.
542 if ((a == cmsSigXYZData) && (b == cmsSigLabData)) return TRUE;
543 if ((a == cmsSigLabData) && (b == cmsSigXYZData)) return TRUE;
544
545 return FALSE;
546 }
547
548
549 // Default handler for ICC-style intents
550 static
551 cmsPipeline* DefaultICCintents(cmsContext ContextID,
552 cmsUInt32Number nProfiles,
553 cmsUInt32Number TheIntents[],
554 cmsHPROFILE hProfiles[],
555 cmsBool BPC[],
556 cmsFloat64Number AdaptationStates[],
557 cmsUInt32Number dwFlags)
558 {
559 cmsPipeline* Lut = NULL;
560 cmsPipeline* Result;
561 cmsHPROFILE hProfile;
562 cmsMAT3 m;
563 cmsVEC3 off;
564 cmsColorSpaceSignature ColorSpaceIn, ColorSpaceOut = cmsSigLabData, CurrentColorSpace;
565 cmsProfileClassSignature ClassSig;
566 cmsUInt32Number i, Intent;
567
568 // For safety
569 if (nProfiles == 0) return NULL;
570
571 // Allocate an empty LUT for holding the result. 0 as channel count means 'undefined'
572 Result = cmsPipelineAlloc(ContextID, 0, 0);
573 if (Result == NULL) return NULL;
574
575 CurrentColorSpace = cmsGetColorSpace(hProfiles[0]);
576
577 for (i=0; i < nProfiles; i++) {
578
579 cmsBool lIsDeviceLink, lIsInput;
580
581 hProfile = hProfiles[i];
582 ClassSig = cmsGetDeviceClass(hProfile);
583 lIsDeviceLink = (ClassSig == cmsSigLinkClass || ClassSig == cmsSigAbstractClass );
584
585 // First profile is used as input unless devicelink or abstract
586 if ((i == 0) && !lIsDeviceLink) {
587 lIsInput = TRUE;
588 }
589 else {
590 // Else use profile in the input direction if current space is not PCS
591 lIsInput = (CurrentColorSpace != cmsSigXYZData) &&
592 (CurrentColorSpace != cmsSigLabData);
593 }
594
595 Intent = TheIntents[i];
596
597 if (lIsInput || lIsDeviceLink) {
598
599 ColorSpaceIn = cmsGetColorSpace(hProfile);
600 ColorSpaceOut = cmsGetPCS(hProfile);
601 }
602 else {
603
604 ColorSpaceIn = cmsGetPCS(hProfile);
605 ColorSpaceOut = cmsGetColorSpace(hProfile);
606 }
607
608 if (!ColorSpaceIsCompatible(ColorSpaceIn, CurrentColorSpace)) {
609
610 cmsSignalError(ContextID, cmsERROR_COLORSPACE_CHECK, "ColorSpace mismatch");
611 goto Error;
612 }
613
614 // If devicelink is found, then no custom intent is allowed and we can
615 // read the LUT to be applied. Settings don't apply here.
616 if (lIsDeviceLink || ((ClassSig == cmsSigNamedColorClass) && (nProfiles == 1))) {
617
618 // Get the involved LUT from the profile
619 Lut = _cmsReadDevicelinkLUT(hProfile, Intent);
620 if (Lut == NULL) goto Error;
621
622 // What about abstract profiles?
623 if (ClassSig == cmsSigAbstractClass && i > 0) {
624 if (!ComputeConversion(i, hProfiles, Intent, BPC[i], AdaptationStates[i], &m, &off)) goto Error;
625 }
626 else {
627 _cmsMAT3identity(&m);
628 _cmsVEC3init(&off, 0, 0, 0);
629 }
630
631
632 if (!AddConversion(Result, CurrentColorSpace, ColorSpaceIn, &m, &off)) goto Error;
633
634 }
635 else {
636
637 if (lIsInput) {
638 // Input direction means non-pcs connection, so proceed like devicelinks
639 Lut = _cmsReadInputLUT(hProfile, Intent);
640 if (Lut == NULL) goto Error;
641 }
642 else {
643
644 // Output direction means PCS connection. Intent may apply here
645 Lut = _cmsReadOutputLUT(hProfile, Intent);
646 if (Lut == NULL) goto Error;
647
648
649 if (!ComputeConversion(i, hProfiles, Intent, BPC[i], AdaptationStates[i], &m, &off)) goto Error;
650 if (!AddConversion(Result, CurrentColorSpace, ColorSpaceIn, &m, &off)) goto Error;
651
652 }
653 }
654
655 // Concatenate to the output LUT
656 if (!cmsPipelineCat(Result, Lut))
657 goto Error;
658
659 cmsPipelineFree(Lut);
660 Lut = NULL;
661
662 // Update current space
663 CurrentColorSpace = ColorSpaceOut;
664 }
665
666 // Check for non-negatives clip
667 if (dwFlags & cmsFLAGS_NONEGATIVES) {
668
669 if (ColorSpaceOut == cmsSigGrayData ||
670 ColorSpaceOut == cmsSigRgbData ||
671 ColorSpaceOut == cmsSigCmykData) {
672
673 cmsStage* clip = _cmsStageClipNegatives(Result->ContextID, cmsChannelsOf(ColorSpaceOut));
674 if (clip == NULL) goto Error;
675
676 if (!cmsPipelineInsertStage(Result, cmsAT_END, clip))
677 goto Error;
678 }
679
680 }
681
682 return Result;
683
684 Error:
685
686 if (Lut != NULL) cmsPipelineFree(Lut);
687 if (Result != NULL) cmsPipelineFree(Result);
688 return NULL;
689
690 cmsUNUSED_PARAMETER(dwFlags);
691 }
692
693
694 // Wrapper for DLL calling convention
695 cmsPipeline* CMSEXPORT _cmsDefaultICCintents(cmsContext ContextID,
696 cmsUInt32Number nProfiles,
697 cmsUInt32Number TheIntents[],
698 cmsHPROFILE hProfiles[],
699 cmsBool BPC[],
700 cmsFloat64Number AdaptationStates[],
701 cmsUInt32Number dwFlags)
702 {
703 return DefaultICCintents(ContextID, nProfiles, TheIntents, hProfiles, BPC, AdaptationStates, dwFlags);
704 }
705
706 // Black preserving intents ---------------------------------------------------------------------------------------------
707
708 // Translate black-preserving intents to ICC ones
709 static
710 int TranslateNonICCIntents(int Intent)
711 {
712 switch (Intent) {
713 case INTENT_PRESERVE_K_ONLY_PERCEPTUAL:
714 case INTENT_PRESERVE_K_PLANE_PERCEPTUAL:
715 return INTENT_PERCEPTUAL;
716
717 case INTENT_PRESERVE_K_ONLY_RELATIVE_COLORIMETRIC:
718 case INTENT_PRESERVE_K_PLANE_RELATIVE_COLORIMETRIC:
719 return INTENT_RELATIVE_COLORIMETRIC;
720
721 case INTENT_PRESERVE_K_ONLY_SATURATION:
722 case INTENT_PRESERVE_K_PLANE_SATURATION:
723 return INTENT_SATURATION;
724
725 default: return Intent;
726 }
727 }
728
729 // Sampler for Black-only preserving CMYK->CMYK transforms
730
731 typedef struct {
732 cmsPipeline* cmyk2cmyk; // The original transform
733 cmsToneCurve* KTone; // Black-to-black tone curve
734
735 } GrayOnlyParams;
736
737
738 // Preserve black only if that is the only ink used
739 static
740 int BlackPreservingGrayOnlySampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo)
741 {
742 GrayOnlyParams* bp = (GrayOnlyParams*) Cargo;
743
744 // If going across black only, keep black only
745 if (In[0] == 0 && In[1] == 0 && In[2] == 0) {
746
747 // TAC does not apply because it is black ink!
748 Out[0] = Out[1] = Out[2] = 0;
749 Out[3] = cmsEvalToneCurve16(bp->KTone, In[3]);
750 return TRUE;
751 }
752
753 // Keep normal transform for other colors
754 bp ->cmyk2cmyk ->Eval16Fn(In, Out, bp ->cmyk2cmyk->Data);
755 return TRUE;
756 }
757
758 // This is the entry for black-preserving K-only intents, which are non-ICC
759 static
760 cmsPipeline* BlackPreservingKOnlyIntents(cmsContext ContextID,
761 cmsUInt32Number nProfiles,
762 cmsUInt32Number TheIntents[],
763 cmsHPROFILE hProfiles[],
764 cmsBool BPC[],
765 cmsFloat64Number AdaptationStates[],
766 cmsUInt32Number dwFlags)
767 {
768 GrayOnlyParams bp;
769 cmsPipeline* Result;
770 cmsUInt32Number ICCIntents[256];
771 cmsStage* CLUT;
772 cmsUInt32Number i, nGridPoints;
773
774
775 // Sanity check
776 if (nProfiles < 1 || nProfiles > 255) return NULL;
777
778 // Translate black-preserving intents to ICC ones
779 for (i=0; i < nProfiles; i++)
780 ICCIntents[i] = TranslateNonICCIntents(TheIntents[i]);
781
782 // Check for non-cmyk profiles
783 if (cmsGetColorSpace(hProfiles[0]) != cmsSigCmykData ||
784 cmsGetColorSpace(hProfiles[nProfiles-1]) != cmsSigCmykData)
785 return DefaultICCintents(ContextID, nProfiles, ICCIntents, hProfiles, BPC, AdaptationStates, dwFlags);
786
787 memset(&bp, 0, sizeof(bp));
788
789 // Allocate an empty LUT for holding the result
790 Result = cmsPipelineAlloc(ContextID, 4, 4);
791 if (Result == NULL) return NULL;
792
793 // Create a LUT holding normal ICC transform
794 bp.cmyk2cmyk = DefaultICCintents(ContextID,
795 nProfiles,
796 ICCIntents,
797 hProfiles,
798 BPC,
799 AdaptationStates,
800 dwFlags);
801
802 if (bp.cmyk2cmyk == NULL) goto Error;
803
804 // Now, compute the tone curve
805 bp.KTone = _cmsBuildKToneCurve(ContextID,
806 4096,
807 nProfiles,
808 ICCIntents,
809 hProfiles,
810 BPC,
811 AdaptationStates,
812 dwFlags);
813
814 if (bp.KTone == NULL) goto Error;
815
816
817 // How many gridpoints are we going to use?
818 nGridPoints = _cmsReasonableGridpointsByColorspace(cmsSigCmykData, dwFlags);
819
820 // Create the CLUT. 16 bits
821 CLUT = cmsStageAllocCLut16bit(ContextID, nGridPoints, 4, 4, NULL);
822 if (CLUT == NULL) goto Error;
823
824 // This is the one and only MPE in this LUT
825 if (!cmsPipelineInsertStage(Result, cmsAT_BEGIN, CLUT))
826 goto Error;
827
828 // Sample it. We cannot afford pre/post linearization this time.
829 if (!cmsStageSampleCLut16bit(CLUT, BlackPreservingGrayOnlySampler, (void*) &bp, 0))
830 goto Error;
831
832 // Get rid of xform and tone curve
833 cmsPipelineFree(bp.cmyk2cmyk);
834 cmsFreeToneCurve(bp.KTone);
835
836 return Result;
837
838 Error:
839
840 if (bp.cmyk2cmyk != NULL) cmsPipelineFree(bp.cmyk2cmyk);
841 if (bp.KTone != NULL) cmsFreeToneCurve(bp.KTone);
842 if (Result != NULL) cmsPipelineFree(Result);
843 return NULL;
844
845 }
846
847 // K Plane-preserving CMYK to CMYK ------------------------------------------------------------------------------------
848
849 typedef struct {
850
851 cmsPipeline* cmyk2cmyk; // The original transform
852 cmsHTRANSFORM hProofOutput; // Output CMYK to Lab (last profile)
853 cmsHTRANSFORM cmyk2Lab; // The input chain
854 cmsToneCurve* KTone; // Black-to-black tone curve
855 cmsPipeline* LabK2cmyk; // The output profile
856 cmsFloat64Number MaxError;
857
858 cmsHTRANSFORM hRoundTrip;
859 cmsFloat64Number MaxTAC;
860
861
862 } PreserveKPlaneParams;
863
864
865 // The CLUT will be stored at 16 bits, but calculations are performed at cmsFloat32Number precision
866 static
867 int BlackPreservingSampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo)
868 {
869 int i;
870 cmsFloat32Number Inf[4], Outf[4];
871 cmsFloat32Number LabK[4];
872 cmsFloat64Number SumCMY, SumCMYK, Error, Ratio;
873 cmsCIELab ColorimetricLab, BlackPreservingLab;
874 PreserveKPlaneParams* bp = (PreserveKPlaneParams*) Cargo;
875
876 // Convert from 16 bits to floating point
877 for (i=0; i < 4; i++)
878 Inf[i] = (cmsFloat32Number) (In[i] / 65535.0);
879
880 // Get the K across Tone curve
881 LabK[3] = cmsEvalToneCurveFloat(bp ->KTone, Inf[3]);
882
883 // If going across black only, keep black only
884 if (In[0] == 0 && In[1] == 0 && In[2] == 0) {
885
886 Out[0] = Out[1] = Out[2] = 0;
887 Out[3] = _cmsQuickSaturateWord(LabK[3] * 65535.0);
888 return TRUE;
889 }
890
891 // Try the original transform,
892 cmsPipelineEvalFloat( Inf, Outf, bp ->cmyk2cmyk);
893
894 // Store a copy of the floating point result into 16-bit
895 for (i=0; i < 4; i++)
896 Out[i] = _cmsQuickSaturateWord(Outf[i] * 65535.0);
897
898 // Maybe K is already ok (mostly on K=0)
899 if ( fabs(Outf[3] - LabK[3]) < (3.0 / 65535.0) ) {
900 return TRUE;
901 }
902
903 // K differ, mesure and keep Lab measurement for further usage
904 // this is done in relative colorimetric intent
905 cmsDoTransform(bp->hProofOutput, Out, &ColorimetricLab, 1);
906
907 // Is not black only and the transform doesn't keep black.
908 // Obtain the Lab of output CMYK. After that we have Lab + K
909 cmsDoTransform(bp ->cmyk2Lab, Outf, LabK, 1);
910
911 // Obtain the corresponding CMY using reverse interpolation
912 // (K is fixed in LabK[3])
913 if (!cmsPipelineEvalReverseFloat(LabK, Outf, Outf, bp ->LabK2cmyk)) {
914
915 // Cannot find a suitable value, so use colorimetric xform
916 // which is already stored in Out[]
917 return TRUE;
918 }
919
920 // Make sure to pass thru K (which now is fixed)
921 Outf[3] = LabK[3];
922
923 // Apply TAC if needed
924 SumCMY = Outf[0] + Outf[1] + Outf[2];
925 SumCMYK = SumCMY + Outf[3];
926
927 if (SumCMYK > bp ->MaxTAC) {
928
929 Ratio = 1 - ((SumCMYK - bp->MaxTAC) / SumCMY);
930 if (Ratio < 0)
931 Ratio = 0;
932 }
933 else
934 Ratio = 1.0;
935
936 Out[0] = _cmsQuickSaturateWord(Outf[0] * Ratio * 65535.0); // C
937 Out[1] = _cmsQuickSaturateWord(Outf[1] * Ratio * 65535.0); // M
938 Out[2] = _cmsQuickSaturateWord(Outf[2] * Ratio * 65535.0); // Y
939 Out[3] = _cmsQuickSaturateWord(Outf[3] * 65535.0);
940
941 // Estimate the error (this goes 16 bits to Lab DBL)
942 cmsDoTransform(bp->hProofOutput, Out, &BlackPreservingLab, 1);
943 Error = cmsDeltaE(&ColorimetricLab, &BlackPreservingLab);
944 if (Error > bp -> MaxError)
945 bp->MaxError = Error;
946
947 return TRUE;
948 }
949
950 // This is the entry for black-plane preserving, which are non-ICC
951 static
952 cmsPipeline* BlackPreservingKPlaneIntents(cmsContext ContextID,
953 cmsUInt32Number nProfiles,
954 cmsUInt32Number TheIntents[],
955 cmsHPROFILE hProfiles[],
956 cmsBool BPC[],
957 cmsFloat64Number AdaptationStates[],
958 cmsUInt32Number dwFlags)
959 {
960 PreserveKPlaneParams bp;
961 cmsPipeline* Result = NULL;
962 cmsUInt32Number ICCIntents[256];
963 cmsStage* CLUT;
964 cmsUInt32Number i, nGridPoints;
965 cmsHPROFILE hLab;
966
967 // Sanity check
968 if (nProfiles < 1 || nProfiles > 255) return NULL;
969
970 // Translate black-preserving intents to ICC ones
971 for (i=0; i < nProfiles; i++)
972 ICCIntents[i] = TranslateNonICCIntents(TheIntents[i]);
973
974 // Check for non-cmyk profiles
975 if (cmsGetColorSpace(hProfiles[0]) != cmsSigCmykData ||
976 !(cmsGetColorSpace(hProfiles[nProfiles-1]) == cmsSigCmykData ||
977 cmsGetDeviceClass(hProfiles[nProfiles-1]) == cmsSigOutputClass))
978 return DefaultICCintents(ContextID, nProfiles, ICCIntents, hProfiles, BPC, AdaptationStates, dwFlags);
979
980 // Allocate an empty LUT for holding the result
981 Result = cmsPipelineAlloc(ContextID, 4, 4);
982 if (Result == NULL) return NULL;
983
984
985 memset(&bp, 0, sizeof(bp));
986
987 // We need the input LUT of the last profile, assuming this one is responsible of
988 // black generation. This LUT will be seached in inverse order.
989 bp.LabK2cmyk = _cmsReadInputLUT(hProfiles[nProfiles-1], INTENT_RELATIVE_COLORIMETRIC);
990 if (bp.LabK2cmyk == NULL) goto Cleanup;
991
992 // Get total area coverage (in 0..1 domain)
993 bp.MaxTAC = cmsDetectTAC(hProfiles[nProfiles-1]) / 100.0;
994 if (bp.MaxTAC <= 0) goto Cleanup;
995
996
997 // Create a LUT holding normal ICC transform
998 bp.cmyk2cmyk = DefaultICCintents(ContextID,
999 nProfiles,
1000 ICCIntents,
1001 hProfiles,
1002 BPC,
1003 AdaptationStates,
1004 dwFlags);
1005 if (bp.cmyk2cmyk == NULL) goto Cleanup;
1006
1007 // Now the tone curve
1008 bp.KTone = _cmsBuildKToneCurve(ContextID, 4096, nProfiles,
1009 ICCIntents,
1010 hProfiles,
1011 BPC,
1012 AdaptationStates,
1013 dwFlags);
1014 if (bp.KTone == NULL) goto Cleanup;
1015
1016 // To measure the output, Last profile to Lab
1017 hLab = cmsCreateLab4ProfileTHR(ContextID, NULL);
1018 bp.hProofOutput = cmsCreateTransformTHR(ContextID, hProfiles[nProfiles-1],
1019 CHANNELS_SH(4)|BYTES_SH(2), hLab, TYPE_Lab_DBL,
1020 INTENT_RELATIVE_COLORIMETRIC,
1021 cmsFLAGS_NOCACHE|cmsFLAGS_NOOPTIMIZE);
1022 if ( bp.hProofOutput == NULL) goto Cleanup;
1023
1024 // Same as anterior, but lab in the 0..1 range
1025 bp.cmyk2Lab = cmsCreateTransformTHR(ContextID, hProfiles[nProfiles-1],
1026 FLOAT_SH(1)|CHANNELS_SH(4)|BYTES_SH(4), hLab,
1027 FLOAT_SH(1)|CHANNELS_SH(3)|BYTES_SH(4),
1028 INTENT_RELATIVE_COLORIMETRIC,
1029 cmsFLAGS_NOCACHE|cmsFLAGS_NOOPTIMIZE);
1030 if (bp.cmyk2Lab == NULL) goto Cleanup;
1031 cmsCloseProfile(hLab);
1032
1033 // Error estimation (for debug only)
1034 bp.MaxError = 0;
1035
1036 // How many gridpoints are we going to use?
1037 nGridPoints = _cmsReasonableGridpointsByColorspace(cmsSigCmykData, dwFlags);
1038
1039
1040 CLUT = cmsStageAllocCLut16bit(ContextID, nGridPoints, 4, 4, NULL);
1041 if (CLUT == NULL) goto Cleanup;
1042
1043 if (!cmsPipelineInsertStage(Result, cmsAT_BEGIN, CLUT))
1044 goto Cleanup;
1045
1046 cmsStageSampleCLut16bit(CLUT, BlackPreservingSampler, (void*) &bp, 0);
1047
1048 Cleanup:
1049
1050 if (bp.cmyk2cmyk) cmsPipelineFree(bp.cmyk2cmyk);
1051 if (bp.cmyk2Lab) cmsDeleteTransform(bp.cmyk2Lab);
1052 if (bp.hProofOutput) cmsDeleteTransform(bp.hProofOutput);
1053
1054 if (bp.KTone) cmsFreeToneCurve(bp.KTone);
1055 if (bp.LabK2cmyk) cmsPipelineFree(bp.LabK2cmyk);
1056
1057 return Result;
1058 }
1059
1060 // Link routines ------------------------------------------------------------------------------------------------------
1061
1062 // Chain several profiles into a single LUT. It just checks the parameters and then calls the handler
1063 // for the first intent in chain. The handler may be user-defined. Is up to the handler to deal with the
1064 // rest of intents in chain. A maximum of 255 profiles at time are supported, which is pretty reasonable.
1065 cmsPipeline* _cmsLinkProfiles(cmsContext ContextID,
1066 cmsUInt32Number nProfiles,
1067 cmsUInt32Number TheIntents[],
1068 cmsHPROFILE hProfiles[],
1069 cmsBool BPC[],
1070 cmsFloat64Number AdaptationStates[],
1071 cmsUInt32Number dwFlags)
1072 {
1073 cmsUInt32Number i;
1074 cmsIntentsList* Intent;
1075
1076 // Make sure a reasonable number of profiles is provided
1077 if (nProfiles <= 0 || nProfiles > 255) {
1078 cmsSignalError(ContextID, cmsERROR_RANGE, "Couldn't link '%d' profiles", nProfiles);
1079 return NULL;
1080 }
1081
1082 for (i=0; i < nProfiles; i++) {
1083
1084 // Check if black point is really needed or allowed. Note that
1085 // following Adobe's document:
1086 // BPC does not apply to devicelink profiles, nor to abs colorimetric,
1087 // and applies always on V4 perceptual and saturation.
1088
1089 if (TheIntents[i] == INTENT_ABSOLUTE_COLORIMETRIC)
1090 BPC[i] = FALSE;
1091
1092 if (TheIntents[i] == INTENT_PERCEPTUAL || TheIntents[i] == INTENT_SATURATION) {
1093
1094 // Force BPC for V4 profiles in perceptual and saturation
1095 if (cmsGetEncodedICCversion(hProfiles[i]) >= 0x4000000)
1096 BPC[i] = TRUE;
1097 }
1098 }
1099
1100 // Search for a handler. The first intent in the chain defines the handler. That would
1101 // prevent using multiple custom intents in a multiintent chain, but the behaviour of
1102 // this case would present some issues if the custom intent tries to do things like
1103 // preserve primaries. This solution is not perfect, but works well on most cases.
1104
1105 Intent = SearchIntent(ContextID, TheIntents[0]);
1106 if (Intent == NULL) {
1107 cmsSignalError(ContextID, cmsERROR_UNKNOWN_EXTENSION, "Unsupported intent '%d'", TheIntents[0]);
1108 return NULL;
1109 }
1110
1111 // Call the handler
1112 return Intent ->Link(ContextID, nProfiles, TheIntents, hProfiles, BPC, AdaptationStates, dwFlags);
1113 }
1114
1115 // -------------------------------------------------------------------------------------------------
1116
1117 // Get information about available intents. nMax is the maximum space for the supplied "Codes"
1118 // and "Descriptions" the function returns the total number of intents, which may be greater
1119 // than nMax, although the matrices are not populated beyond this level.
1120 cmsUInt32Number CMSEXPORT cmsGetSupportedIntentsTHR(cmsContext ContextID, cmsUInt32Number nMax, cmsUInt32Number* Codes, char** Descriptions)
1121 {
1122 _cmsIntentsPluginChunkType* ctx = ( _cmsIntentsPluginChunkType*) _cmsContextGetClientChunk(ContextID, IntentPlugin);
1123 cmsIntentsList* pt;
1124 cmsUInt32Number nIntents;
1125
1126
1127 for (nIntents=0, pt = ctx->Intents; pt != NULL; pt = pt -> Next)
1128 {
1129 if (nIntents < nMax) {
1130 if (Codes != NULL)
1131 Codes[nIntents] = pt ->Intent;
1132
1133 if (Descriptions != NULL)
1134 Descriptions[nIntents] = pt ->Description;
1135 }
1136
1137 nIntents++;
1138 }
1139
1140 for (nIntents=0, pt = DefaultIntents; pt != NULL; pt = pt -> Next)
1141 {
1142 if (nIntents < nMax) {
1143 if (Codes != NULL)
1144 Codes[nIntents] = pt ->Intent;
1145
1146 if (Descriptions != NULL)
1147 Descriptions[nIntents] = pt ->Description;
1148 }
1149
1150 nIntents++;
1151 }
1152 return nIntents;
1153 }
1154
1155 cmsUInt32Number CMSEXPORT cmsGetSupportedIntents(cmsUInt32Number nMax, cmsUInt32Number* Codes, char** Descriptions)
1156 {
1157 return cmsGetSupportedIntentsTHR(NULL, nMax, Codes, Descriptions);
1158 }
1159
1160 // The plug-in registration. User can add new intents or override default routines
1161 cmsBool _cmsRegisterRenderingIntentPlugin(cmsContext id, cmsPluginBase* Data)
1162 {
1163 _cmsIntentsPluginChunkType* ctx = ( _cmsIntentsPluginChunkType*) _cmsContextGetClientChunk(id, IntentPlugin);
1164 cmsPluginRenderingIntent* Plugin = (cmsPluginRenderingIntent*) Data;
1165 cmsIntentsList* fl;
1166
1167 // Do we have to reset the custom intents?
1168 if (Data == NULL) {
1169
1170 ctx->Intents = NULL;
1171 return TRUE;
1172 }
1173
1174 fl = (cmsIntentsList*) _cmsPluginMalloc(id, sizeof(cmsIntentsList));
1175 if (fl == NULL) return FALSE;
1176
1177
1178 fl ->Intent = Plugin ->Intent;
1179 strncpy(fl ->Description, Plugin ->Description, sizeof(fl ->Description)-1);
1180 fl ->Description[sizeof(fl ->Description)-1] = 0;
1181
1182 fl ->Link = Plugin ->Link;
1183
1184 fl ->Next = ctx ->Intents;
1185 ctx ->Intents = fl;
1186
1187 return TRUE;
1188 }
1189