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
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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) 1998-2016 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 beginning 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 // TODO: Add support for ArgyllArts tag
303
304 // Adaptation state
305 if (AdaptationState == 1.0) {
306
307 // Observer is fully adapted. Keep chromatic adaptation.
308 // That is the standard V4 behaviour
309 _cmsVEC3init(&m->v[0], WhitePointIn->X / WhitePointOut->X, 0, 0);
310 _cmsVEC3init(&m->v[1], 0, WhitePointIn->Y / WhitePointOut->Y, 0);
311 _cmsVEC3init(&m->v[2], 0, 0, WhitePointIn->Z / WhitePointOut->Z);
312
313 }
314 else {
315
316 // Incomplete adaptation. This is an advanced feature.
317 _cmsVEC3init(&Scale.v[0], WhitePointIn->X / WhitePointOut->X, 0, 0);
318 _cmsVEC3init(&Scale.v[1], 0, WhitePointIn->Y / WhitePointOut->Y, 0);
319 _cmsVEC3init(&Scale.v[2], 0, 0, WhitePointIn->Z / WhitePointOut->Z);
320
321
322 if (AdaptationState == 0.0) {
323
324 m1 = *ChromaticAdaptationMatrixOut;
325 _cmsMAT3per(&m2, &m1, &Scale);
326 // m2 holds CHAD from output white to D50 times abs. col. scaling
327
328 // Observer is not adapted, undo the chromatic adaptation
329 _cmsMAT3per(m, &m2, ChromaticAdaptationMatrixOut);
330
331 m3 = *ChromaticAdaptationMatrixIn;
332 if (!_cmsMAT3inverse(&m3, &m4)) return FALSE;
333 _cmsMAT3per(m, &m2, &m4);
334
335 } else {
336
337 cmsMAT3 MixedCHAD;
338 cmsFloat64Number TempSrc, TempDest, Temp;
339
340 m1 = *ChromaticAdaptationMatrixIn;
341 if (!_cmsMAT3inverse(&m1, &m2)) return FALSE;
342 _cmsMAT3per(&m3, &m2, &Scale);
343 // m3 holds CHAD from input white to D50 times abs. col. scaling
344
345 TempSrc = CHAD2Temp(ChromaticAdaptationMatrixIn);
346 TempDest = CHAD2Temp(ChromaticAdaptationMatrixOut);
347
348 if (TempSrc < 0.0 || TempDest < 0.0) return FALSE; // Something went wrong
349
350 if (_cmsMAT3isIdentity(&Scale) && fabs(TempSrc - TempDest) < 0.01) {
351
352 _cmsMAT3identity(m);
353 return TRUE;
354 }
355
356 Temp = (1.0 - AdaptationState) * TempDest + AdaptationState * TempSrc;
357
358 // Get a CHAD from whatever output temperature to D50. This replaces output CHAD
359 Temp2CHAD(&MixedCHAD, Temp);
360
361 _cmsMAT3per(m, &m3, &MixedCHAD);
362 }
363
364 }
365 return TRUE;
366
367 }
368
369 // Just to see if m matrix should be applied
370 static
371 cmsBool IsEmptyLayer(cmsMAT3* m, cmsVEC3* off)
372 {
373 cmsFloat64Number diff = 0;
374 cmsMAT3 Ident;
375 int i;
376
377 if (m == NULL && off == NULL) return TRUE; // NULL is allowed as an empty layer
378 if (m == NULL && off != NULL) return FALSE; // This is an internal error
379
380 _cmsMAT3identity(&Ident);
381
382 for (i=0; i < 3*3; i++)
383 diff += fabs(((cmsFloat64Number*)m)[i] - ((cmsFloat64Number*)&Ident)[i]);
384
385 for (i=0; i < 3; i++)
386 diff += fabs(((cmsFloat64Number*)off)[i]);
387
388
389 return (diff < 0.002);
390 }
391
392
393 // Compute the conversion layer
394 static
395 cmsBool ComputeConversion(int i, cmsHPROFILE hProfiles[],
396 cmsUInt32Number Intent,
397 cmsBool BPC,
398 cmsFloat64Number AdaptationState,
399 cmsMAT3* m, cmsVEC3* off)
400 {
401
402 int k;
403
404 // m and off are set to identity and this is detected latter on
405 _cmsMAT3identity(m);
406 _cmsVEC3init(off, 0, 0, 0);
407
408 // If intent is abs. colorimetric,
409 if (Intent == INTENT_ABSOLUTE_COLORIMETRIC) {
410
411 cmsCIEXYZ WhitePointIn, WhitePointOut;
412 cmsMAT3 ChromaticAdaptationMatrixIn, ChromaticAdaptationMatrixOut;
413
414 _cmsReadMediaWhitePoint(&WhitePointIn, hProfiles[i-1]);
415 _cmsReadCHAD(&ChromaticAdaptationMatrixIn, hProfiles[i-1]);
416
417 _cmsReadMediaWhitePoint(&WhitePointOut, hProfiles[i]);
418 _cmsReadCHAD(&ChromaticAdaptationMatrixOut, hProfiles[i]);
419
420 if (!ComputeAbsoluteIntent(AdaptationState,
421 &WhitePointIn, &ChromaticAdaptationMatrixIn,
422 &WhitePointOut, &ChromaticAdaptationMatrixOut, m)) return FALSE;
423
424 }
425 else {
426 // Rest of intents may apply BPC.
427
428 if (BPC) {
429
430 cmsCIEXYZ BlackPointIn, BlackPointOut;
431
432 cmsDetectBlackPoint(&BlackPointIn, hProfiles[i-1], Intent, 0);
433 cmsDetectDestinationBlackPoint(&BlackPointOut, hProfiles[i], Intent, 0);
434
435 // If black points are equal, then do nothing
436 if (BlackPointIn.X != BlackPointOut.X ||
437 BlackPointIn.Y != BlackPointOut.Y ||
438 BlackPointIn.Z != BlackPointOut.Z)
439 ComputeBlackPointCompensation(&BlackPointIn, &BlackPointOut, m, off);
440 }
441 }
442
443 // Offset should be adjusted because the encoding. We encode XYZ normalized to 0..1.0,
444 // to do that, we divide by MAX_ENCODEABLE_XZY. The conversion stage goes XYZ -> XYZ so
445 // we have first to convert from encoded to XYZ and then convert back to encoded.
446 // y = Mx + Off
447 // x = x'c
448 // y = M x'c + Off
449 // y = y'c; y' = y / c
450 // y' = (Mx'c + Off) /c = Mx' + (Off / c)
451
452 for (k=0; k < 3; k++) {
453 off ->n[k] /= MAX_ENCODEABLE_XYZ;
454 }
455
456 return TRUE;
457 }
458
459
460 // Add a conversion stage if needed. If a matrix/offset m is given, it applies to XYZ space
461 static
462 cmsBool AddConversion(cmsPipeline* Result, cmsColorSpaceSignature InPCS, cmsColorSpaceSignature OutPCS, cmsMAT3* m, cmsVEC3* off)
463 {
464 cmsFloat64Number* m_as_dbl = (cmsFloat64Number*) m;
465 cmsFloat64Number* off_as_dbl = (cmsFloat64Number*) off;
466
467 // Handle PCS mismatches. A specialized stage is added to the LUT in such case
468 switch (InPCS) {
469
470 case cmsSigXYZData: // Input profile operates in XYZ
471
472 switch (OutPCS) {
473
474 case cmsSigXYZData: // XYZ -> XYZ
475 if (!IsEmptyLayer(m, off) &&
476 !cmsPipelineInsertStage(Result, cmsAT_END, cmsStageAllocMatrix(Result ->ContextID, 3, 3, m_as_dbl, off_as_dbl)))
477 return FALSE;
478 break;
479
480 case cmsSigLabData: // XYZ -> Lab
481 if (!IsEmptyLayer(m, off) &&
482 !cmsPipelineInsertStage(Result, cmsAT_END, cmsStageAllocMatrix(Result ->ContextID, 3, 3, m_as_dbl, off_as_dbl)))
483 return FALSE;
484 if (!cmsPipelineInsertStage(Result, cmsAT_END, _cmsStageAllocXYZ2Lab(Result ->ContextID)))
485 return FALSE;
486 break;
487
488 default:
489 return FALSE; // Colorspace mismatch
490 }
491 break;
492
493 case cmsSigLabData: // Input profile operates in Lab
494
495 switch (OutPCS) {
496
497 case cmsSigXYZData: // Lab -> XYZ
498
499 if (!cmsPipelineInsertStage(Result, cmsAT_END, _cmsStageAllocLab2XYZ(Result ->ContextID)))
500 return FALSE;
501 if (!IsEmptyLayer(m, off) &&
502 !cmsPipelineInsertStage(Result, cmsAT_END, cmsStageAllocMatrix(Result ->ContextID, 3, 3, m_as_dbl, off_as_dbl)))
503 return FALSE;
504 break;
505
506 case cmsSigLabData: // Lab -> Lab
507
508 if (!IsEmptyLayer(m, off)) {
509 if (!cmsPipelineInsertStage(Result, cmsAT_END, _cmsStageAllocLab2XYZ(Result ->ContextID)) ||
510 !cmsPipelineInsertStage(Result, cmsAT_END, cmsStageAllocMatrix(Result ->ContextID, 3, 3, m_as_dbl, off_as_dbl)) ||
511 !cmsPipelineInsertStage(Result, cmsAT_END, _cmsStageAllocXYZ2Lab(Result ->ContextID)))
512 return FALSE;
513 }
514 break;
515
516 default:
517 return FALSE; // Mismatch
518 }
519 break;
520
521 // On colorspaces other than PCS, check for same space
522 default:
523 if (InPCS != OutPCS) return FALSE;
524 break;
525 }
526
527 return TRUE;
528 }
529
530
531 // Is a given space compatible with another?
532 static
533 cmsBool ColorSpaceIsCompatible(cmsColorSpaceSignature a, cmsColorSpaceSignature b)
534 {
535 // If they are same, they are compatible.
536 if (a == b) return TRUE;
537
538 // Check for MCH4 substitution of CMYK
539 if ((a == cmsSig4colorData) && (b == cmsSigCmykData)) return TRUE;
540 if ((a == cmsSigCmykData) && (b == cmsSig4colorData)) return TRUE;
541
542 // Check for XYZ/Lab. Those spaces are interchangeable as they can be computed one from other.
543 if ((a == cmsSigXYZData) && (b == cmsSigLabData)) return TRUE;
544 if ((a == cmsSigLabData) && (b == cmsSigXYZData)) return TRUE;
545
546 return FALSE;
547 }
548
549
550 // Default handler for ICC-style intents
551 static
552 cmsPipeline* DefaultICCintents(cmsContext ContextID,
553 cmsUInt32Number nProfiles,
554 cmsUInt32Number TheIntents[],
555 cmsHPROFILE hProfiles[],
556 cmsBool BPC[],
557 cmsFloat64Number AdaptationStates[],
558 cmsUInt32Number dwFlags)
559 {
560 cmsPipeline* Lut = NULL;
561 cmsPipeline* Result;
562 cmsHPROFILE hProfile;
563 cmsMAT3 m;
564 cmsVEC3 off;
565 cmsColorSpaceSignature ColorSpaceIn, ColorSpaceOut = cmsSigLabData, CurrentColorSpace;
566 cmsProfileClassSignature ClassSig;
567 cmsUInt32Number i, Intent;
568
569 // For safety
570 if (nProfiles == 0) return NULL;
571
572 // Allocate an empty LUT for holding the result. 0 as channel count means 'undefined'
573 Result = cmsPipelineAlloc(ContextID, 0, 0);
574 if (Result == NULL) return NULL;
575
576 CurrentColorSpace = cmsGetColorSpace(hProfiles[0]);
577
578 for (i=0; i < nProfiles; i++) {
579
580 cmsBool lIsDeviceLink, lIsInput;
581
582 hProfile = hProfiles[i];
583 ClassSig = cmsGetDeviceClass(hProfile);
584 lIsDeviceLink = (ClassSig == cmsSigLinkClass || ClassSig == cmsSigAbstractClass );
585
586 // First profile is used as input unless devicelink or abstract
587 if ((i == 0) && !lIsDeviceLink) {
588 lIsInput = TRUE;
589 }
590 else {
591 // Else use profile in the input direction if current space is not PCS
592 lIsInput = (CurrentColorSpace != cmsSigXYZData) &&
593 (CurrentColorSpace != cmsSigLabData);
594 }
595
596 Intent = TheIntents[i];
597
598 if (lIsInput || lIsDeviceLink) {
599
600 ColorSpaceIn = cmsGetColorSpace(hProfile);
601 ColorSpaceOut = cmsGetPCS(hProfile);
602 }
603 else {
604
605 ColorSpaceIn = cmsGetPCS(hProfile);
606 ColorSpaceOut = cmsGetColorSpace(hProfile);
607 }
608
609 if (!ColorSpaceIsCompatible(ColorSpaceIn, CurrentColorSpace)) {
610
611 cmsSignalError(ContextID, cmsERROR_COLORSPACE_CHECK, "ColorSpace mismatch");
612 goto Error;
613 }
614
615 // If devicelink is found, then no custom intent is allowed and we can
616 // read the LUT to be applied. Settings don't apply here.
617 if (lIsDeviceLink || ((ClassSig == cmsSigNamedColorClass) && (nProfiles == 1))) {
618
619 // Get the involved LUT from the profile
620 Lut = _cmsReadDevicelinkLUT(hProfile, Intent);
621 if (Lut == NULL) goto Error;
622
623 // What about abstract profiles?
624 if (ClassSig == cmsSigAbstractClass && i > 0) {
625 if (!ComputeConversion(i, hProfiles, Intent, BPC[i], AdaptationStates[i], &m, &off)) goto Error;
626 }
627 else {
628 _cmsMAT3identity(&m);
629 _cmsVEC3init(&off, 0, 0, 0);
630 }
631
632
633 if (!AddConversion(Result, CurrentColorSpace, ColorSpaceIn, &m, &off)) goto Error;
634
635 }
636 else {
637
638 if (lIsInput) {
639 // Input direction means non-pcs connection, so proceed like devicelinks
640 Lut = _cmsReadInputLUT(hProfile, Intent);
641 if (Lut == NULL) goto Error;
642 }
643 else {
644
645 // Output direction means PCS connection. Intent may apply here
646 Lut = _cmsReadOutputLUT(hProfile, Intent);
647 if (Lut == NULL) goto Error;
648
649
650 if (!ComputeConversion(i, hProfiles, Intent, BPC[i], AdaptationStates[i], &m, &off)) goto Error;
651 if (!AddConversion(Result, CurrentColorSpace, ColorSpaceIn, &m, &off)) goto Error;
652
653 }
654 }
655
656 // Concatenate to the output LUT
657 if (!cmsPipelineCat(Result, Lut))
658 goto Error;
659
660 cmsPipelineFree(Lut);
661 Lut = NULL;
662
663 // Update current space
664 CurrentColorSpace = ColorSpaceOut;
665 }
666
667 // Check for non-negatives clip
668 if (dwFlags & cmsFLAGS_NONEGATIVES) {
669
670 if (ColorSpaceOut == cmsSigGrayData ||
671 ColorSpaceOut == cmsSigRgbData ||
672 ColorSpaceOut == cmsSigCmykData) {
673
674 cmsStage* clip = _cmsStageClipNegatives(Result->ContextID, cmsChannelsOf(ColorSpaceOut));
675 if (clip == NULL) goto Error;
676
677 if (!cmsPipelineInsertStage(Result, cmsAT_END, clip))
678 goto Error;
679 }
680
681 }
682
683 return Result;
684
685 Error:
686
687 if (Lut != NULL) cmsPipelineFree(Lut);
688 if (Result != NULL) cmsPipelineFree(Result);
689 return NULL;
690
691 cmsUNUSED_PARAMETER(dwFlags);
692 }
693
694
695 // Wrapper for DLL calling convention
696 cmsPipeline* CMSEXPORT _cmsDefaultICCintents(cmsContext ContextID,
697 cmsUInt32Number nProfiles,
698 cmsUInt32Number TheIntents[],
699 cmsHPROFILE hProfiles[],
700 cmsBool BPC[],
701 cmsFloat64Number AdaptationStates[],
702 cmsUInt32Number dwFlags)
703 {
704 return DefaultICCintents(ContextID, nProfiles, TheIntents, hProfiles, BPC, AdaptationStates, dwFlags);
705 }
706
707 // Black preserving intents ---------------------------------------------------------------------------------------------
708
709 // Translate black-preserving intents to ICC ones
710 static
711 int TranslateNonICCIntents(int Intent)
712 {
713 switch (Intent) {
714 case INTENT_PRESERVE_K_ONLY_PERCEPTUAL:
715 case INTENT_PRESERVE_K_PLANE_PERCEPTUAL:
716 return INTENT_PERCEPTUAL;
717
718 case INTENT_PRESERVE_K_ONLY_RELATIVE_COLORIMETRIC:
719 case INTENT_PRESERVE_K_PLANE_RELATIVE_COLORIMETRIC:
720 return INTENT_RELATIVE_COLORIMETRIC;
721
722 case INTENT_PRESERVE_K_ONLY_SATURATION:
723 case INTENT_PRESERVE_K_PLANE_SATURATION:
724 return INTENT_SATURATION;
725
726 default: return Intent;
727 }
728 }
729
730 // Sampler for Black-only preserving CMYK->CMYK transforms
731
732 typedef struct {
733 cmsPipeline* cmyk2cmyk; // The original transform
734 cmsToneCurve* KTone; // Black-to-black tone curve
735
736 } GrayOnlyParams;
737
738
739 // Preserve black only if that is the only ink used
740 static
741 int BlackPreservingGrayOnlySampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo)
742 {
743 GrayOnlyParams* bp = (GrayOnlyParams*) Cargo;
744
745 // If going across black only, keep black only
746 if (In[0] == 0 && In[1] == 0 && In[2] == 0) {
747
748 // TAC does not apply because it is black ink!
749 Out[0] = Out[1] = Out[2] = 0;
750 Out[3] = cmsEvalToneCurve16(bp->KTone, In[3]);
751 return TRUE;
752 }
753
754 // Keep normal transform for other colors
755 bp ->cmyk2cmyk ->Eval16Fn(In, Out, bp ->cmyk2cmyk->Data);
756 return TRUE;
757 }
758
759 // This is the entry for black-preserving K-only intents, which are non-ICC
760 static
761 cmsPipeline* BlackPreservingKOnlyIntents(cmsContext ContextID,
762 cmsUInt32Number nProfiles,
763 cmsUInt32Number TheIntents[],
764 cmsHPROFILE hProfiles[],
765 cmsBool BPC[],
766 cmsFloat64Number AdaptationStates[],
767 cmsUInt32Number dwFlags)
768 {
769 GrayOnlyParams bp;
770 cmsPipeline* Result;
771 cmsUInt32Number ICCIntents[256];
772 cmsStage* CLUT;
773 cmsUInt32Number i, nGridPoints;
774
775
776 // Sanity check
777 if (nProfiles < 1 || nProfiles > 255) return NULL;
778
779 // Translate black-preserving intents to ICC ones
780 for (i=0; i < nProfiles; i++)
781 ICCIntents[i] = TranslateNonICCIntents(TheIntents[i]);
782
783 // Check for non-cmyk profiles
784 if (cmsGetColorSpace(hProfiles[0]) != cmsSigCmykData ||
785 cmsGetColorSpace(hProfiles[nProfiles-1]) != cmsSigCmykData)
786 return DefaultICCintents(ContextID, nProfiles, ICCIntents, hProfiles, BPC, AdaptationStates, dwFlags);
787
788 memset(&bp, 0, sizeof(bp));
789
790 // Allocate an empty LUT for holding the result
791 Result = cmsPipelineAlloc(ContextID, 4, 4);
792 if (Result == NULL) return NULL;
793
794 // Create a LUT holding normal ICC transform
795 bp.cmyk2cmyk = DefaultICCintents(ContextID,
796 nProfiles,
797 ICCIntents,
798 hProfiles,
799 BPC,
800 AdaptationStates,
801 dwFlags);
802
803 if (bp.cmyk2cmyk == NULL) goto Error;
804
805 // Now, compute the tone curve
806 bp.KTone = _cmsBuildKToneCurve(ContextID,
807 4096,
808 nProfiles,
809 ICCIntents,
810 hProfiles,
811 BPC,
812 AdaptationStates,
813 dwFlags);
814
815 if (bp.KTone == NULL) goto Error;
816
817
818 // How many gridpoints are we going to use?
819 nGridPoints = _cmsReasonableGridpointsByColorspace(cmsSigCmykData, dwFlags);
820
821 // Create the CLUT. 16 bits
822 CLUT = cmsStageAllocCLut16bit(ContextID, nGridPoints, 4, 4, NULL);
823 if (CLUT == NULL) goto Error;
824
825 // This is the one and only MPE in this LUT
826 if (!cmsPipelineInsertStage(Result, cmsAT_BEGIN, CLUT))
827 goto Error;
828
829 // Sample it. We cannot afford pre/post linearization this time.
830 if (!cmsStageSampleCLut16bit(CLUT, BlackPreservingGrayOnlySampler, (void*) &bp, 0))
831 goto Error;
832
833 // Get rid of xform and tone curve
834 cmsPipelineFree(bp.cmyk2cmyk);
835 cmsFreeToneCurve(bp.KTone);
836
837 return Result;
838
839 Error:
840
841 if (bp.cmyk2cmyk != NULL) cmsPipelineFree(bp.cmyk2cmyk);
842 if (bp.KTone != NULL) cmsFreeToneCurve(bp.KTone);
843 if (Result != NULL) cmsPipelineFree(Result);
844 return NULL;
845
846 }
847
848 // K Plane-preserving CMYK to CMYK ------------------------------------------------------------------------------------
849
850 typedef struct {
851
852 cmsPipeline* cmyk2cmyk; // The original transform
853 cmsHTRANSFORM hProofOutput; // Output CMYK to Lab (last profile)
854 cmsHTRANSFORM cmyk2Lab; // The input chain
855 cmsToneCurve* KTone; // Black-to-black tone curve
856 cmsPipeline* LabK2cmyk; // The output profile
857 cmsFloat64Number MaxError;
858
859 cmsHTRANSFORM hRoundTrip;
860 cmsFloat64Number MaxTAC;
861
862
863 } PreserveKPlaneParams;
864
865
866 // The CLUT will be stored at 16 bits, but calculations are performed at cmsFloat32Number precision
867 static
868 int BlackPreservingSampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo)
869 {
870 int i;
871 cmsFloat32Number Inf[4], Outf[4];
872 cmsFloat32Number LabK[4];
873 cmsFloat64Number SumCMY, SumCMYK, Error, Ratio;
874 cmsCIELab ColorimetricLab, BlackPreservingLab;
875 PreserveKPlaneParams* bp = (PreserveKPlaneParams*) Cargo;
876
877 // Convert from 16 bits to floating point
878 for (i=0; i < 4; i++)
879 Inf[i] = (cmsFloat32Number) (In[i] / 65535.0);
880
881 // Get the K across Tone curve
882 LabK[3] = cmsEvalToneCurveFloat(bp ->KTone, Inf[3]);
883
884 // If going across black only, keep black only
885 if (In[0] == 0 && In[1] == 0 && In[2] == 0) {
886
887 Out[0] = Out[1] = Out[2] = 0;
888 Out[3] = _cmsQuickSaturateWord(LabK[3] * 65535.0);
889 return TRUE;
890 }
891
892 // Try the original transform,
893 cmsPipelineEvalFloat( Inf, Outf, bp ->cmyk2cmyk);
894
895 // Store a copy of the floating point result into 16-bit
896 for (i=0; i < 4; i++)
897 Out[i] = _cmsQuickSaturateWord(Outf[i] * 65535.0);
898
899 // Maybe K is already ok (mostly on K=0)
900 if ( fabs(Outf[3] - LabK[3]) < (3.0 / 65535.0) ) {
901 return TRUE;
902 }
903
904 // K differ, mesure and keep Lab measurement for further usage
905 // this is done in relative colorimetric intent
906 cmsDoTransform(bp->hProofOutput, Out, &ColorimetricLab, 1);
907
908 // Is not black only and the transform doesn't keep black.
909 // Obtain the Lab of output CMYK. After that we have Lab + K
910 cmsDoTransform(bp ->cmyk2Lab, Outf, LabK, 1);
911
912 // Obtain the corresponding CMY using reverse interpolation
913 // (K is fixed in LabK[3])
914 if (!cmsPipelineEvalReverseFloat(LabK, Outf, Outf, bp ->LabK2cmyk)) {
915
916 // Cannot find a suitable value, so use colorimetric xform
917 // which is already stored in Out[]
918 return TRUE;
919 }
920
921 // Make sure to pass through K (which now is fixed)
922 Outf[3] = LabK[3];
923
924 // Apply TAC if needed
925 SumCMY = Outf[0] + Outf[1] + Outf[2];
926 SumCMYK = SumCMY + Outf[3];
927
928 if (SumCMYK > bp ->MaxTAC) {
929
930 Ratio = 1 - ((SumCMYK - bp->MaxTAC) / SumCMY);
931 if (Ratio < 0)
932 Ratio = 0;
933 }
934 else
935 Ratio = 1.0;
936
937 Out[0] = _cmsQuickSaturateWord(Outf[0] * Ratio * 65535.0); // C
938 Out[1] = _cmsQuickSaturateWord(Outf[1] * Ratio * 65535.0); // M
939 Out[2] = _cmsQuickSaturateWord(Outf[2] * Ratio * 65535.0); // Y
940 Out[3] = _cmsQuickSaturateWord(Outf[3] * 65535.0);
941
942 // Estimate the error (this goes 16 bits to Lab DBL)
943 cmsDoTransform(bp->hProofOutput, Out, &BlackPreservingLab, 1);
944 Error = cmsDeltaE(&ColorimetricLab, &BlackPreservingLab);
945 if (Error > bp -> MaxError)
946 bp->MaxError = Error;
947
948 return TRUE;
949 }
950
951 // This is the entry for black-plane preserving, which are non-ICC
952 static
953 cmsPipeline* BlackPreservingKPlaneIntents(cmsContext ContextID,
954 cmsUInt32Number nProfiles,
955 cmsUInt32Number TheIntents[],
956 cmsHPROFILE hProfiles[],
957 cmsBool BPC[],
958 cmsFloat64Number AdaptationStates[],
959 cmsUInt32Number dwFlags)
960 {
961 PreserveKPlaneParams bp;
962 cmsPipeline* Result = NULL;
963 cmsUInt32Number ICCIntents[256];
964 cmsStage* CLUT;
965 cmsUInt32Number i, nGridPoints;
966 cmsHPROFILE hLab;
967
968 // Sanity check
969 if (nProfiles < 1 || nProfiles > 255) return NULL;
970
971 // Translate black-preserving intents to ICC ones
972 for (i=0; i < nProfiles; i++)
973 ICCIntents[i] = TranslateNonICCIntents(TheIntents[i]);
974
975 // Check for non-cmyk profiles
976 if (cmsGetColorSpace(hProfiles[0]) != cmsSigCmykData ||
977 !(cmsGetColorSpace(hProfiles[nProfiles-1]) == cmsSigCmykData ||
978 cmsGetDeviceClass(hProfiles[nProfiles-1]) == cmsSigOutputClass))
979 return DefaultICCintents(ContextID, nProfiles, ICCIntents, hProfiles, BPC, AdaptationStates, dwFlags);
980
981 // Allocate an empty LUT for holding the result
982 Result = cmsPipelineAlloc(ContextID, 4, 4);
983 if (Result == NULL) return NULL;
984
985
986 memset(&bp, 0, sizeof(bp));
987
988 // We need the input LUT of the last profile, assuming this one is responsible of
989 // black generation. This LUT will be searched in inverse order.
990 bp.LabK2cmyk = _cmsReadInputLUT(hProfiles[nProfiles-1], INTENT_RELATIVE_COLORIMETRIC);
991 if (bp.LabK2cmyk == NULL) goto Cleanup;
992
993 // Get total area coverage (in 0..1 domain)
994 bp.MaxTAC = cmsDetectTAC(hProfiles[nProfiles-1]) / 100.0;
995 if (bp.MaxTAC <= 0) goto Cleanup;
996
997
998 // Create a LUT holding normal ICC transform
999 bp.cmyk2cmyk = DefaultICCintents(ContextID,
1000 nProfiles,
1001 ICCIntents,
1002 hProfiles,
1003 BPC,
1004 AdaptationStates,
1005 dwFlags);
1006 if (bp.cmyk2cmyk == NULL) goto Cleanup;
1007
1008 // Now the tone curve
1009 bp.KTone = _cmsBuildKToneCurve(ContextID, 4096, nProfiles,
1010 ICCIntents,
1011 hProfiles,
1012 BPC,
1013 AdaptationStates,
1014 dwFlags);
1015 if (bp.KTone == NULL) goto Cleanup;
1016
1017 // To measure the output, Last profile to Lab
1018 hLab = cmsCreateLab4ProfileTHR(ContextID, NULL);
1019 bp.hProofOutput = cmsCreateTransformTHR(ContextID, hProfiles[nProfiles-1],
1020 CHANNELS_SH(4)|BYTES_SH(2), hLab, TYPE_Lab_DBL,
1021 INTENT_RELATIVE_COLORIMETRIC,
1022 cmsFLAGS_NOCACHE|cmsFLAGS_NOOPTIMIZE);
1023 if ( bp.hProofOutput == NULL) goto Cleanup;
1024
1025 // Same as anterior, but lab in the 0..1 range
1026 bp.cmyk2Lab = cmsCreateTransformTHR(ContextID, hProfiles[nProfiles-1],
1027 FLOAT_SH(1)|CHANNELS_SH(4)|BYTES_SH(4), hLab,
1028 FLOAT_SH(1)|CHANNELS_SH(3)|BYTES_SH(4),
1029 INTENT_RELATIVE_COLORIMETRIC,
1030 cmsFLAGS_NOCACHE|cmsFLAGS_NOOPTIMIZE);
1031 if (bp.cmyk2Lab == NULL) goto Cleanup;
1032 cmsCloseProfile(hLab);
1033
1034 // Error estimation (for debug only)
1035 bp.MaxError = 0;
1036
1037 // How many gridpoints are we going to use?
1038 nGridPoints = _cmsReasonableGridpointsByColorspace(cmsSigCmykData, dwFlags);
1039
1040
1041 CLUT = cmsStageAllocCLut16bit(ContextID, nGridPoints, 4, 4, NULL);
1042 if (CLUT == NULL) goto Cleanup;
1043
1044 if (!cmsPipelineInsertStage(Result, cmsAT_BEGIN, CLUT))
1045 goto Cleanup;
1046
1047 cmsStageSampleCLut16bit(CLUT, BlackPreservingSampler, (void*) &bp, 0);
1048
1049 Cleanup:
1050
1051 if (bp.cmyk2cmyk) cmsPipelineFree(bp.cmyk2cmyk);
1052 if (bp.cmyk2Lab) cmsDeleteTransform(bp.cmyk2Lab);
1053 if (bp.hProofOutput) cmsDeleteTransform(bp.hProofOutput);
1054
1055 if (bp.KTone) cmsFreeToneCurve(bp.KTone);
1056 if (bp.LabK2cmyk) cmsPipelineFree(bp.LabK2cmyk);
1057
1058 return Result;
1059 }
1060
1061 // Link routines ------------------------------------------------------------------------------------------------------
1062
1063 // Chain several profiles into a single LUT. It just checks the parameters and then calls the handler
1064 // for the first intent in chain. The handler may be user-defined. Is up to the handler to deal with the
1065 // rest of intents in chain. A maximum of 255 profiles at time are supported, which is pretty reasonable.
1066 cmsPipeline* _cmsLinkProfiles(cmsContext ContextID,
1067 cmsUInt32Number nProfiles,
1068 cmsUInt32Number TheIntents[],
1069 cmsHPROFILE hProfiles[],
1070 cmsBool BPC[],
1071 cmsFloat64Number AdaptationStates[],
1072 cmsUInt32Number dwFlags)
1073 {
1074 cmsUInt32Number i;
1075 cmsIntentsList* Intent;
1076
1077 // Make sure a reasonable number of profiles is provided
1078 if (nProfiles <= 0 || nProfiles > 255) {
1079 cmsSignalError(ContextID, cmsERROR_RANGE, "Couldn't link '%d' profiles", nProfiles);
1080 return NULL;
1081 }
1082
1083 for (i=0; i < nProfiles; i++) {
1084
1085 // Check if black point is really needed or allowed. Note that
1086 // following Adobe's document:
1087 // BPC does not apply to devicelink profiles, nor to abs colorimetric,
1088 // and applies always on V4 perceptual and saturation.
1089
1090 if (TheIntents[i] == INTENT_ABSOLUTE_COLORIMETRIC)
1091 BPC[i] = FALSE;
1092
1093 if (TheIntents[i] == INTENT_PERCEPTUAL || TheIntents[i] == INTENT_SATURATION) {
1094
1095 // Force BPC for V4 profiles in perceptual and saturation
1096 if (cmsGetEncodedICCversion(hProfiles[i]) >= 0x4000000)
1097 BPC[i] = TRUE;
1098 }
1099 }
1100
1101 // Search for a handler. The first intent in the chain defines the handler. That would
1102 // prevent using multiple custom intents in a multiintent chain, but the behaviour of
1103 // this case would present some issues if the custom intent tries to do things like
1104 // preserve primaries. This solution is not perfect, but works well on most cases.
1105
1106 Intent = SearchIntent(ContextID, TheIntents[0]);
1107 if (Intent == NULL) {
1108 cmsSignalError(ContextID, cmsERROR_UNKNOWN_EXTENSION, "Unsupported intent '%d'", TheIntents[0]);
1109 return NULL;
1110 }
1111
1112 // Call the handler
1113 return Intent ->Link(ContextID, nProfiles, TheIntents, hProfiles, BPC, AdaptationStates, dwFlags);
1114 }
1115
1116 // -------------------------------------------------------------------------------------------------
1117
1118 // Get information about available intents. nMax is the maximum space for the supplied "Codes"
1119 // and "Descriptions" the function returns the total number of intents, which may be greater
1120 // than nMax, although the matrices are not populated beyond this level.
1121 cmsUInt32Number CMSEXPORT cmsGetSupportedIntentsTHR(cmsContext ContextID, cmsUInt32Number nMax, cmsUInt32Number* Codes, char** Descriptions)
1122 {
1123 _cmsIntentsPluginChunkType* ctx = ( _cmsIntentsPluginChunkType*) _cmsContextGetClientChunk(ContextID, IntentPlugin);
1124 cmsIntentsList* pt;
1125 cmsUInt32Number nIntents;
1126
1127
1128 for (nIntents=0, pt = ctx->Intents; pt != NULL; pt = pt -> Next)
1129 {
1130 if (nIntents < nMax) {
1131 if (Codes != NULL)
1132 Codes[nIntents] = pt ->Intent;
1133
1134 if (Descriptions != NULL)
1135 Descriptions[nIntents] = pt ->Description;
1136 }
1137
1138 nIntents++;
1139 }
1140
1141 for (nIntents=0, pt = DefaultIntents; pt != NULL; pt = pt -> Next)
1142 {
1143 if (nIntents < nMax) {
1144 if (Codes != NULL)
1145 Codes[nIntents] = pt ->Intent;
1146
1147 if (Descriptions != NULL)
1148 Descriptions[nIntents] = pt ->Description;
1149 }
1150
1151 nIntents++;
1152 }
1153 return nIntents;
1154 }
1155
1156 cmsUInt32Number CMSEXPORT cmsGetSupportedIntents(cmsUInt32Number nMax, cmsUInt32Number* Codes, char** Descriptions)
1157 {
1158 return cmsGetSupportedIntentsTHR(NULL, nMax, Codes, Descriptions);
1159 }
1160
1161 // The plug-in registration. User can add new intents or override default routines
1162 cmsBool _cmsRegisterRenderingIntentPlugin(cmsContext id, cmsPluginBase* Data)
1163 {
1164 _cmsIntentsPluginChunkType* ctx = ( _cmsIntentsPluginChunkType*) _cmsContextGetClientChunk(id, IntentPlugin);
1165 cmsPluginRenderingIntent* Plugin = (cmsPluginRenderingIntent*) Data;
1166 cmsIntentsList* fl;
1167
1168 // Do we have to reset the custom intents?
1169 if (Data == NULL) {
1170
1171 ctx->Intents = NULL;
1172 return TRUE;
1173 }
1174
1175 fl = (cmsIntentsList*) _cmsPluginMalloc(id, sizeof(cmsIntentsList));
1176 if (fl == NULL) return FALSE;
1177
1178
1179 fl ->Intent = Plugin ->Intent;
1180 strncpy(fl ->Description, Plugin ->Description, sizeof(fl ->Description)-1);
1181 fl ->Description[sizeof(fl ->Description)-1] = 0;
1182
1183 fl ->Link = Plugin ->Link;
1184
1185 fl ->Next = ctx ->Intents;
1186 ctx ->Intents = fl;
1187
1188 return TRUE;
1189 }
1190