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) 1998-2010 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 // ----------------------------------------------------------------------------------
60 // Encoding & Decoding support functions
61 // ----------------------------------------------------------------------------------
62
63 // Little-Endian to Big-Endian
64
65 // Adjust a word value after being readed/ before being written from/to an ICC profile
66 cmsUInt16Number CMSEXPORT _cmsAdjustEndianess16(cmsUInt16Number Word)
67 {
68 #ifndef CMS_USE_BIG_ENDIAN
69
70 cmsUInt8Number* pByte = (cmsUInt8Number*) &Word;
71 cmsUInt8Number tmp;
72
73 tmp = pByte[0];
74 pByte[0] = pByte[1];
75 pByte[1] = tmp;
76 #endif
77
78 return Word;
79 }
80
81
82 // Transports to properly encoded values - note that icc profiles does use big endian notation.
83
84 // 1 2 3 4
85 // 4 3 2 1
86
87 cmsUInt32Number CMSEXPORT _cmsAdjustEndianess32(cmsUInt32Number DWord)
88 {
89 #ifndef CMS_USE_BIG_ENDIAN
90
91 cmsUInt8Number* pByte = (cmsUInt8Number*) &DWord;
92 cmsUInt8Number temp1;
93 cmsUInt8Number temp2;
94
95 temp1 = *pByte++;
96 temp2 = *pByte++;
97 *(pByte-1) = *pByte;
98 *pByte++ = temp2;
99 *(pByte-3) = *pByte;
100 *pByte = temp1;
101 #endif
102 return DWord;
103 }
104
105 // 1 2 3 4 5 6 7 8
106 // 8 7 6 5 4 3 2 1
107
108 void CMSEXPORT _cmsAdjustEndianess64(cmsUInt64Number* Result, cmsUInt64Number* QWord)
109 {
110
111 #ifndef CMS_USE_BIG_ENDIAN
112
113 cmsUInt8Number* pIn = (cmsUInt8Number*) QWord;
114 cmsUInt8Number* pOut = (cmsUInt8Number*) Result;
115
116 _cmsAssert(Result != NULL);
117
118 pOut[7] = pIn[0];
119 pOut[6] = pIn[1];
120 pOut[5] = pIn[2];
121 pOut[4] = pIn[3];
122 pOut[3] = pIn[4];
123 pOut[2] = pIn[5];
124 pOut[1] = pIn[6];
125 pOut[0] = pIn[7];
126
127 #else
128 _cmsAssert(Result != NULL);
129
130 # ifdef CMS_DONT_USE_INT64
131 (*Result)[0] = QWord[0];
132 (*Result)[1] = QWord[1];
133 # else
134 *Result = *QWord;
135 # endif
136 #endif
137 }
138
139 // Auxiliar -- read 8, 16 and 32-bit numbers
140 cmsBool CMSEXPORT _cmsReadUInt8Number(cmsIOHANDLER* io, cmsUInt8Number* n)
141 {
142 cmsUInt8Number tmp;
143
144 _cmsAssert(io != NULL);
145
146 if (io -> Read(io, &tmp, sizeof(cmsUInt8Number), 1) != 1)
147 return FALSE;
148
149 if (n != NULL) *n = tmp;
150 return TRUE;
151 }
152
153 cmsBool CMSEXPORT _cmsReadUInt16Number(cmsIOHANDLER* io, cmsUInt16Number* n)
154 {
155 cmsUInt16Number tmp;
156
157 _cmsAssert(io != NULL);
158
159 if (io -> Read(io, &tmp, sizeof(cmsUInt16Number), 1) != 1)
160 return FALSE;
161
162 if (n != NULL) *n = _cmsAdjustEndianess16(tmp);
163 return TRUE;
164 }
165
166 cmsBool CMSEXPORT _cmsReadUInt16Array(cmsIOHANDLER* io, cmsUInt32Number n, cmsUInt16Number* Array)
167 {
168 cmsUInt32Number i;
169
170 _cmsAssert(io != NULL);
171
172 for (i=0; i < n; i++) {
173
174 if (Array != NULL) {
175 if (!_cmsReadUInt16Number(io, Array + i)) return FALSE;
176 }
177 else {
178 if (!_cmsReadUInt16Number(io, NULL)) return FALSE;
179 }
180
181 }
182 return TRUE;
183 }
184
185 cmsBool CMSEXPORT _cmsReadUInt32Number(cmsIOHANDLER* io, cmsUInt32Number* n)
186 {
187 cmsUInt32Number tmp;
188
189 _cmsAssert(io != NULL);
190
191 if (io -> Read(io, &tmp, sizeof(cmsUInt32Number), 1) != 1)
192 return FALSE;
193
194 if (n != NULL) *n = _cmsAdjustEndianess32(tmp);
195 return TRUE;
196 }
197
198 cmsBool CMSEXPORT _cmsReadFloat32Number(cmsIOHANDLER* io, cmsFloat32Number* n)
199 {
200 cmsUInt32Number tmp;
201
202 _cmsAssert(io != NULL);
203
204 if (io -> Read(io, &tmp, sizeof(cmsFloat32Number), 1) != 1)
205 return FALSE;
206
207 if (n != NULL) {
208
209 tmp = _cmsAdjustEndianess32(tmp);
210 *n = *(cmsFloat32Number*) &tmp;
211 }
212 return TRUE;
213 }
214
215
216 cmsBool CMSEXPORT _cmsReadUInt64Number(cmsIOHANDLER* io, cmsUInt64Number* n)
217 {
218 cmsUInt64Number tmp;
219
220 _cmsAssert(io != NULL);
221
222 if (io -> Read(io, &tmp, sizeof(cmsUInt64Number), 1) != 1)
223 return FALSE;
224
225 if (n != NULL) _cmsAdjustEndianess64(n, &tmp);
226 return TRUE;
227 }
228
229
230 cmsBool CMSEXPORT _cmsRead15Fixed16Number(cmsIOHANDLER* io, cmsFloat64Number* n)
231 {
232 cmsUInt32Number tmp;
233
234 _cmsAssert(io != NULL);
235
236 if (io -> Read(io, &tmp, sizeof(cmsUInt32Number), 1) != 1)
237 return FALSE;
238
239 if (n != NULL) {
240 *n = _cms15Fixed16toDouble(_cmsAdjustEndianess32(tmp));
241 }
242
243 return TRUE;
244 }
245
246
247 // Jun-21-2000: Some profiles (those that comes with W2K) comes
248 // with the media white (media black?) x 100. Add a sanity check
249
250 static
251 void NormalizeXYZ(cmsCIEXYZ* Dest)
252 {
253 while (Dest -> X > 2. &&
254 Dest -> Y > 2. &&
255 Dest -> Z > 2.) {
256
257 Dest -> X /= 10.;
258 Dest -> Y /= 10.;
259 Dest -> Z /= 10.;
260 }
261 }
262
263 cmsBool CMSEXPORT _cmsReadXYZNumber(cmsIOHANDLER* io, cmsCIEXYZ* XYZ)
264 {
265 cmsEncodedXYZNumber xyz;
266
267 _cmsAssert(io != NULL);
268
269 if (io ->Read(io, &xyz, sizeof(cmsEncodedXYZNumber), 1) != 1) return FALSE;
270
271 if (XYZ != NULL) {
272
273 XYZ->X = _cms15Fixed16toDouble(_cmsAdjustEndianess32(xyz.X));
274 XYZ->Y = _cms15Fixed16toDouble(_cmsAdjustEndianess32(xyz.Y));
275 XYZ->Z = _cms15Fixed16toDouble(_cmsAdjustEndianess32(xyz.Z));
276
277 NormalizeXYZ(XYZ);
278 }
279 return TRUE;
280 }
281
282 cmsBool CMSEXPORT _cmsWriteUInt8Number(cmsIOHANDLER* io, cmsUInt8Number n)
283 {
284 _cmsAssert(io != NULL);
285
286 if (io -> Write(io, sizeof(cmsUInt8Number), &n) != 1)
287 return FALSE;
288
289 return TRUE;
290 }
291
292 cmsBool CMSEXPORT _cmsWriteUInt16Number(cmsIOHANDLER* io, cmsUInt16Number n)
293 {
294 cmsUInt16Number tmp;
295
296 _cmsAssert(io != NULL);
297
298 tmp = _cmsAdjustEndianess16(n);
299 if (io -> Write(io, sizeof(cmsUInt16Number), &tmp) != 1)
300 return FALSE;
301
302 return TRUE;
303 }
304
305 cmsBool CMSEXPORT _cmsWriteUInt16Array(cmsIOHANDLER* io, cmsUInt32Number n, const cmsUInt16Number* Array)
306 {
307 cmsUInt32Number i;
308
309 _cmsAssert(io != NULL);
310 _cmsAssert(Array != NULL);
311
312 for (i=0; i < n; i++) {
313 if (!_cmsWriteUInt16Number(io, Array[i])) return FALSE;
314 }
315
316 return TRUE;
317 }
318
319 cmsBool CMSEXPORT _cmsWriteUInt32Number(cmsIOHANDLER* io, cmsUInt32Number n)
320 {
321 cmsUInt32Number tmp;
322
323 _cmsAssert(io != NULL);
324
325 tmp = _cmsAdjustEndianess32(n);
326 if (io -> Write(io, sizeof(cmsUInt32Number), &tmp) != 1)
327 return FALSE;
328
329 return TRUE;
330 }
331
332
333 cmsBool CMSEXPORT _cmsWriteFloat32Number(cmsIOHANDLER* io, cmsFloat32Number n)
334 {
335 cmsUInt32Number tmp;
336
337 _cmsAssert(io != NULL);
338
339 tmp = *(cmsUInt32Number*) &n;
340 tmp = _cmsAdjustEndianess32(tmp);
341 if (io -> Write(io, sizeof(cmsUInt32Number), &tmp) != 1)
342 return FALSE;
343
344 return TRUE;
345 }
346
347 cmsBool CMSEXPORT _cmsWriteUInt64Number(cmsIOHANDLER* io, cmsUInt64Number* n)
348 {
349 cmsUInt64Number tmp;
350
351 _cmsAssert(io != NULL);
352
353 _cmsAdjustEndianess64(&tmp, n);
354 if (io -> Write(io, sizeof(cmsUInt64Number), &tmp) != 1)
355 return FALSE;
356
357 return TRUE;
358 }
359
360 cmsBool CMSEXPORT _cmsWrite15Fixed16Number(cmsIOHANDLER* io, cmsFloat64Number n)
361 {
362 cmsUInt32Number tmp;
363
364 _cmsAssert(io != NULL);
365
366 tmp = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(n));
367 if (io -> Write(io, sizeof(cmsUInt32Number), &tmp) != 1)
368 return FALSE;
369
370 return TRUE;
371 }
372
373 cmsBool CMSEXPORT _cmsWriteXYZNumber(cmsIOHANDLER* io, const cmsCIEXYZ* XYZ)
374 {
375 cmsEncodedXYZNumber xyz;
376
377 _cmsAssert(io != NULL);
378 _cmsAssert(XYZ != NULL);
379
380 xyz.X = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(XYZ->X));
381 xyz.Y = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(XYZ->Y));
382 xyz.Z = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(XYZ->Z));
383
384 return io -> Write(io, sizeof(cmsEncodedXYZNumber), &xyz);
385 }
386
387 // from Fixed point 8.8 to double
388 cmsFloat64Number CMSEXPORT _cms8Fixed8toDouble(cmsUInt16Number fixed8)
389 {
390 cmsUInt8Number msb, lsb;
391
392 lsb = (cmsUInt8Number) (fixed8 & 0xff);
393 msb = (cmsUInt8Number) (((cmsUInt16Number) fixed8 >> 8) & 0xff);
394
395 return (cmsFloat64Number) ((cmsFloat64Number) msb + ((cmsFloat64Number) lsb / 256.0));
396 }
397
398 cmsUInt16Number CMSEXPORT _cmsDoubleTo8Fixed8(cmsFloat64Number val)
399 {
400 cmsS15Fixed16Number GammaFixed32 = _cmsDoubleTo15Fixed16(val);
401 return (cmsUInt16Number) ((GammaFixed32 >> 8) & 0xFFFF);
402 }
403
404 // from Fixed point 15.16 to double
405 cmsFloat64Number CMSEXPORT _cms15Fixed16toDouble(cmsS15Fixed16Number fix32)
406 {
407 cmsFloat64Number floater, sign, mid;
408 int Whole, FracPart;
409
410 sign = (fix32 < 0 ? -1 : 1);
411 fix32 = abs(fix32);
412
413 Whole = (cmsUInt16Number)(fix32 >> 16) & 0xffff;
414 FracPart = (cmsUInt16Number)(fix32 & 0xffff);
415
416 mid = (cmsFloat64Number) FracPart / 65536.0;
417 floater = (cmsFloat64Number) Whole + mid;
418
419 return sign * floater;
420 }
421
422 // from double to Fixed point 15.16
423 cmsS15Fixed16Number CMSEXPORT _cmsDoubleTo15Fixed16(cmsFloat64Number v)
424 {
425 return ((cmsS15Fixed16Number) floor((v)*65536.0 + 0.5));
426 }
427
428 // Date/Time functions
429
430 void CMSEXPORT _cmsDecodeDateTimeNumber(const cmsDateTimeNumber *Source, struct tm *Dest)
431 {
432
433 _cmsAssert(Dest != NULL);
434 _cmsAssert(Source != NULL);
435
436 Dest->tm_sec = _cmsAdjustEndianess16(Source->seconds);
437 Dest->tm_min = _cmsAdjustEndianess16(Source->minutes);
438 Dest->tm_hour = _cmsAdjustEndianess16(Source->hours);
439 Dest->tm_mday = _cmsAdjustEndianess16(Source->day);
440 Dest->tm_mon = _cmsAdjustEndianess16(Source->month) - 1;
441 Dest->tm_year = _cmsAdjustEndianess16(Source->year) - 1900;
442 Dest->tm_wday = -1;
443 Dest->tm_yday = -1;
444 Dest->tm_isdst = 0;
445 }
446
447 void CMSEXPORT _cmsEncodeDateTimeNumber(cmsDateTimeNumber *Dest, const struct tm *Source)
448 {
449 _cmsAssert(Dest != NULL);
450 _cmsAssert(Source != NULL);
451
452 Dest->seconds = _cmsAdjustEndianess16((cmsUInt16Number) Source->tm_sec);
453 Dest->minutes = _cmsAdjustEndianess16((cmsUInt16Number) Source->tm_min);
454 Dest->hours = _cmsAdjustEndianess16((cmsUInt16Number) Source->tm_hour);
455 Dest->day = _cmsAdjustEndianess16((cmsUInt16Number) Source->tm_mday);
456 Dest->month = _cmsAdjustEndianess16((cmsUInt16Number) (Source->tm_mon + 1));
457 Dest->year = _cmsAdjustEndianess16((cmsUInt16Number) (Source->tm_year + 1900));
458 }
459
460 // Read base and return type base
461 cmsTagTypeSignature CMSEXPORT _cmsReadTypeBase(cmsIOHANDLER* io)
462 {
463 _cmsTagBase Base;
464
465 _cmsAssert(io != NULL);
466
467 if (io -> Read(io, &Base, sizeof(_cmsTagBase), 1) != 1)
468 return (cmsTagTypeSignature) 0;
469
470 return (cmsTagTypeSignature) _cmsAdjustEndianess32(Base.sig);
471 }
472
473 // Setup base marker
474 cmsBool CMSEXPORT _cmsWriteTypeBase(cmsIOHANDLER* io, cmsTagTypeSignature sig)
475 {
476 _cmsTagBase Base;
477
478 _cmsAssert(io != NULL);
479
480 Base.sig = (cmsTagTypeSignature) _cmsAdjustEndianess32(sig);
481 memset(&Base.reserved, 0, sizeof(Base.reserved));
482 return io -> Write(io, sizeof(_cmsTagBase), &Base);
483 }
484
485 cmsBool CMSEXPORT _cmsReadAlignment(cmsIOHANDLER* io)
486 {
487 cmsUInt8Number Buffer[4];
488 cmsUInt32Number NextAligned, At;
489 cmsUInt32Number BytesToNextAlignedPos;
490
491 _cmsAssert(io != NULL);
492
493 At = io -> Tell(io);
494 NextAligned = _cmsALIGNLONG(At);
495 BytesToNextAlignedPos = NextAligned - At;
496 if (BytesToNextAlignedPos == 0) return TRUE;
497 if (BytesToNextAlignedPos > 4) return FALSE;
498
499 return (io ->Read(io, Buffer, BytesToNextAlignedPos, 1) == 1);
500 }
501
502 cmsBool CMSEXPORT _cmsWriteAlignment(cmsIOHANDLER* io)
503 {
504 cmsUInt8Number Buffer[4];
505 cmsUInt32Number NextAligned, At;
506 cmsUInt32Number BytesToNextAlignedPos;
507
508 _cmsAssert(io != NULL);
509
510 At = io -> Tell(io);
511 NextAligned = _cmsALIGNLONG(At);
512 BytesToNextAlignedPos = NextAligned - At;
513 if (BytesToNextAlignedPos == 0) return TRUE;
514 if (BytesToNextAlignedPos > 4) return FALSE;
515
516 memset(Buffer, 0, BytesToNextAlignedPos);
517 return io -> Write(io, BytesToNextAlignedPos, Buffer);
518 }
519
520
521 // To deal with text streams. 2K at most
522 cmsBool CMSEXPORT _cmsIOPrintf(cmsIOHANDLER* io, const char* frm, ...)
523 {
524 va_list args;
525 int len;
526 cmsUInt8Number Buffer[2048];
527 cmsBool rc;
528
529 _cmsAssert(io != NULL);
530 _cmsAssert(frm != NULL);
531
532 va_start(args, frm);
533
534 len = vsnprintf((char*) Buffer, 2047, frm, args);
535 if (len < 0) return FALSE; // Truncated, which is a fatal error for us
536
537 rc = io ->Write(io, len, Buffer);
538
539 va_end(args);
540
541 return rc;
542 }
543
544
545 // Plugin memory management -------------------------------------------------------------------------------------------------
546
547 // Specialized malloc for plug-ins, that is freed upon exit.
548 void* _cmsPluginMalloc(cmsContext ContextID, cmsUInt32Number size)
549 {
550 struct _cmsContext_struct* ctx = _cmsGetContext(ContextID);
551
552 if (ctx ->MemPool == NULL) {
553
554 if (ContextID == NULL) {
555
556 ctx->MemPool = _cmsCreateSubAlloc(0, 2*1024);
557 }
558 else {
559 cmsSignalError(ContextID, cmsERROR_CORRUPTION_DETECTED, "NULL memory pool on context");
560 return NULL;
561 }
562 }
563
564 return _cmsSubAlloc(ctx->MemPool, size);
565 }
566
567
568 // Main plug-in dispatcher
569 cmsBool CMSEXPORT cmsPlugin(void* Plug_in)
570 {
571 return cmsPluginTHR(NULL, Plug_in);
572 }
573
574 cmsBool CMSEXPORT cmsPluginTHR(cmsContext id, void* Plug_in)
575 {
576 cmsPluginBase* Plugin;
577
578 for (Plugin = (cmsPluginBase*) Plug_in;
579 Plugin != NULL;
580 Plugin = Plugin -> Next) {
581
582 if (Plugin -> Magic != cmsPluginMagicNumber) {
583 cmsSignalError(id, cmsERROR_UNKNOWN_EXTENSION, "Unrecognized plugin");
584 return FALSE;
585 }
586
587 if (Plugin ->ExpectedVersion > LCMS_VERSION) {
588 cmsSignalError(id, cmsERROR_UNKNOWN_EXTENSION, "plugin needs Little CMS %d, current version is %d",
589 Plugin ->ExpectedVersion, LCMS_VERSION);
590 return FALSE;
591 }
592
593 switch (Plugin -> Type) {
594
595 case cmsPluginMemHandlerSig:
596 if (!_cmsRegisterMemHandlerPlugin(id, Plugin)) return FALSE;
597 break;
598
599 case cmsPluginInterpolationSig:
600 if (!_cmsRegisterInterpPlugin(id, Plugin)) return FALSE;
601 break;
602
603 case cmsPluginTagTypeSig:
604 if (!_cmsRegisterTagTypePlugin(id, Plugin)) return FALSE;
605 break;
606
607 case cmsPluginTagSig:
608 if (!_cmsRegisterTagPlugin(id, Plugin)) return FALSE;
609 break;
610
611 case cmsPluginFormattersSig:
612 if (!_cmsRegisterFormattersPlugin(id, Plugin)) return FALSE;
613 break;
614
615 case cmsPluginRenderingIntentSig:
616 if (!_cmsRegisterRenderingIntentPlugin(id, Plugin)) return FALSE;
617 break;
618
619 case cmsPluginParametricCurveSig:
620 if (!_cmsRegisterParametricCurvesPlugin(id, Plugin)) return FALSE;
621 break;
622
623 case cmsPluginMultiProcessElementSig:
624 if (!_cmsRegisterMultiProcessElementPlugin(id, Plugin)) return FALSE;
625 break;
626
627 case cmsPluginOptimizationSig:
628 if (!_cmsRegisterOptimizationPlugin(id, Plugin)) return FALSE;
629 break;
630
631 case cmsPluginTransformSig:
632 if (!_cmsRegisterTransformPlugin(id, Plugin)) return FALSE;
633 break;
634
635 case cmsPluginMutexSig:
636 if (!_cmsRegisterMutexPlugin(id, Plugin)) return FALSE;
637 break;
638
639 default:
640 cmsSignalError(id, cmsERROR_UNKNOWN_EXTENSION, "Unrecognized plugin type '%X'", Plugin -> Type);
641 return FALSE;
642 }
643 }
644
645 // Keep a reference to the plug-in
646 return TRUE;
647 }
648
649
650 // Revert all plug-ins to default
651 void CMSEXPORT cmsUnregisterPlugins(void)
652 {
653 cmsUnregisterPluginsTHR(NULL);
654 }
655
656
657 // The Global storage for system context. This is the one and only global variable
658 // pointers structure. All global vars are referenced here.
659 static struct _cmsContext_struct globalContext = {
660
661 NULL, // Not in the linked list
662 NULL, // No suballocator
663 {
664 NULL, // UserPtr,
665 &_cmsLogErrorChunk, // Logger,
666 &_cmsAlarmCodesChunk, // AlarmCodes,
667 &_cmsAdaptationStateChunk, // AdaptationState,
668 &_cmsMemPluginChunk, // MemPlugin,
669 &_cmsInterpPluginChunk, // InterpPlugin,
670 &_cmsCurvesPluginChunk, // CurvesPlugin,
671 &_cmsFormattersPluginChunk, // FormattersPlugin,
672 &_cmsTagTypePluginChunk, // TagTypePlugin,
673 &_cmsTagPluginChunk, // TagPlugin,
674 &_cmsIntentsPluginChunk, // IntentPlugin,
675 &_cmsMPETypePluginChunk, // MPEPlugin,
676 &_cmsOptimizationPluginChunk, // OptimizationPlugin,
677 &_cmsTransformPluginChunk, // TransformPlugin,
678 &_cmsMutexPluginChunk // MutexPlugin
679 },
680
681 { NULL, NULL, NULL, NULL, NULL, NULL } // The default memory allocator is not used for context 0
682 };
683
684
685 // The context pool (linked list head)
686 static _cmsMutex _cmsContextPoolHeadMutex = CMS_MUTEX_INITIALIZER;
687 static struct _cmsContext_struct* _cmsContextPoolHead = NULL;
688
689 // Internal, get associated pointer, with guessing. Never returns NULL.
690 struct _cmsContext_struct* _cmsGetContext(cmsContext ContextID)
691 {
692 struct _cmsContext_struct* id = (struct _cmsContext_struct*) ContextID;
693 struct _cmsContext_struct* ctx;
694
695
696 // On 0, use global settings
697 if (id == NULL)
698 return &globalContext;
699
700 // Search
701 for (ctx = _cmsContextPoolHead;
702 ctx != NULL;
703 ctx = ctx ->Next) {
704
705 // Found it?
706 if (id == ctx)
707 return ctx; // New-style context,
708 }
709
710 return &globalContext;
711 }
712
713
714 // Internal: get the memory area associanted with each context client
715 // Returns the block assigned to the specific zone. Never return NULL.
716 void* _cmsContextGetClientChunk(cmsContext ContextID, _cmsMemoryClient mc)
717 {
718 struct _cmsContext_struct* ctx;
719 void *ptr;
720
721 if ((int) mc < 0 || mc >= MemoryClientMax) {
722
723 cmsSignalError(ContextID, cmsERROR_INTERNAL, "Bad context client -- possible corruption");
724
725 // This is catastrophic. Should never reach here
726 _cmsAssert(0);
727
728 // Reverts to global context
729 return globalContext.chunks[UserPtr];
730 }
731
732 ctx = _cmsGetContext(ContextID);
733 ptr = ctx ->chunks[mc];
734
735 if (ptr != NULL)
736 return ptr;
737
738 // A null ptr means no special settings for that context, and this
739 // reverts to Context0 globals
740 return globalContext.chunks[mc];
741 }
742
743
744 // This function returns the given context its default pristine state,
745 // as no plug-ins were declared. There is no way to unregister a single
746 // plug-in, as a single call to cmsPluginTHR() function may register
747 // many different plug-ins simultaneously, then there is no way to
748 // identify which plug-in to unregister.
749 void CMSEXPORT cmsUnregisterPluginsTHR(cmsContext ContextID)
750 {
751 _cmsRegisterMemHandlerPlugin(ContextID, NULL);
752 _cmsRegisterInterpPlugin(ContextID, NULL);
753 _cmsRegisterTagTypePlugin(ContextID, NULL);
754 _cmsRegisterTagPlugin(ContextID, NULL);
755 _cmsRegisterFormattersPlugin(ContextID, NULL);
756 _cmsRegisterRenderingIntentPlugin(ContextID, NULL);
757 _cmsRegisterParametricCurvesPlugin(ContextID, NULL);
758 _cmsRegisterMultiProcessElementPlugin(ContextID, NULL);
759 _cmsRegisterOptimizationPlugin(ContextID, NULL);
760 _cmsRegisterTransformPlugin(ContextID, NULL);
761 _cmsRegisterMutexPlugin(ContextID, NULL);
762 }
763
764
765 // Returns the memory manager plug-in, if any, from the Plug-in bundle
766 static
767 cmsPluginMemHandler* _cmsFindMemoryPlugin(void* PluginBundle)
768 {
769 cmsPluginBase* Plugin;
770
771 for (Plugin = (cmsPluginBase*) PluginBundle;
772 Plugin != NULL;
773 Plugin = Plugin -> Next) {
774
775 if (Plugin -> Magic == cmsPluginMagicNumber &&
776 Plugin -> ExpectedVersion <= LCMS_VERSION &&
777 Plugin -> Type == cmsPluginMemHandlerSig) {
778
779 // Found!
780 return (cmsPluginMemHandler*) Plugin;
781 }
782 }
783
784 // Nope, revert to defaults
785 return NULL;
786 }
787
788
789 // Creates a new context with optional associated plug-ins. Caller may also specify an optional pointer to user-defined
790 // data that will be forwarded to plug-ins and logger.
791 cmsContext CMSEXPORT cmsCreateContext(void* Plugin, void* UserData)
792 {
793 struct _cmsContext_struct* ctx;
794 struct _cmsContext_struct fakeContext;
795
796 _cmsInstallAllocFunctions(_cmsFindMemoryPlugin(Plugin), &fakeContext.DefaultMemoryManager);
797
798 fakeContext.chunks[UserPtr] = UserData;
799 fakeContext.chunks[MemPlugin] = &fakeContext.DefaultMemoryManager;
800
801 // Create the context structure.
802 ctx = (struct _cmsContext_struct*) _cmsMalloc(&fakeContext, sizeof(struct _cmsContext_struct));
803 if (ctx == NULL)
804 return NULL; // Something very wrong happened!
805
806 // Init the structure and the memory manager
807 memset(ctx, 0, sizeof(struct _cmsContext_struct));
808
809 // Keep memory manager
810 memcpy(&ctx->DefaultMemoryManager, &fakeContext.DefaultMemoryManager, sizeof(_cmsMemPluginChunk));
811
812 // Maintain the linked list (with proper locking)
813 _cmsEnterCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
814 ctx ->Next = _cmsContextPoolHead;
815 _cmsContextPoolHead = ctx;
816 _cmsLeaveCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
817
818 ctx ->chunks[UserPtr] = UserData;
819 ctx ->chunks[MemPlugin] = &ctx->DefaultMemoryManager;
820
821 // Now we can allocate the pool by using default memory manager
822 ctx ->MemPool = _cmsCreateSubAlloc(ctx, 22 * sizeof(void*)); // default size about 32 pointers
823 if (ctx ->MemPool == NULL) {
824
825 cmsDeleteContext(ctx);
826 return NULL;
827 }
828
829 _cmsAllocLogErrorChunk(ctx, NULL);
830 _cmsAllocAlarmCodesChunk(ctx, NULL);
831 _cmsAllocAdaptationStateChunk(ctx, NULL);
832 _cmsAllocMemPluginChunk(ctx, NULL);
833 _cmsAllocInterpPluginChunk(ctx, NULL);
834 _cmsAllocCurvesPluginChunk(ctx, NULL);
835 _cmsAllocFormattersPluginChunk(ctx, NULL);
836 _cmsAllocTagTypePluginChunk(ctx, NULL);
837 _cmsAllocMPETypePluginChunk(ctx, NULL);
838 _cmsAllocTagPluginChunk(ctx, NULL);
839 _cmsAllocIntentsPluginChunk(ctx, NULL);
840 _cmsAllocOptimizationPluginChunk(ctx, NULL);
841 _cmsAllocTransformPluginChunk(ctx, NULL);
842 _cmsAllocMutexPluginChunk(ctx, NULL);
843
844 // Setup the plug-ins
845 if (!cmsPluginTHR(ctx, Plugin)) {
846
847 cmsDeleteContext(ctx);
848 return NULL;
849 }
850
851 return (cmsContext) ctx;
852 }
853
854 // Duplicates a context with all associated plug-ins.
855 // Caller may specify an optional pointer to user-defined
856 // data that will be forwarded to plug-ins and logger.
857 cmsContext CMSEXPORT cmsDupContext(cmsContext ContextID, void* NewUserData)
858 {
859 int i;
860 struct _cmsContext_struct* ctx;
861 const struct _cmsContext_struct* src = _cmsGetContext(ContextID);
862
863 void* userData = (NewUserData != NULL) ? NewUserData : src -> chunks[UserPtr];
864
865
866 ctx = (struct _cmsContext_struct*) _cmsMalloc(ContextID, sizeof(struct _cmsContext_struct));
867 if (ctx == NULL)
868 return NULL; // Something very wrong happened
869
870 // Setup default memory allocators
871 memcpy(&ctx->DefaultMemoryManager, &src->DefaultMemoryManager, sizeof(ctx->DefaultMemoryManager));
872
873 // Maintain the linked list
874 _cmsEnterCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
875 ctx ->Next = _cmsContextPoolHead;
876 _cmsContextPoolHead = ctx;
877 _cmsLeaveCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
878
879 ctx ->chunks[UserPtr] = userData;
880 ctx ->chunks[MemPlugin] = &ctx->DefaultMemoryManager;
881
882 ctx ->MemPool = _cmsCreateSubAlloc(ctx, 22 * sizeof(void*));
883 if (ctx ->MemPool == NULL) {
884
885 cmsDeleteContext(ctx);
886 return NULL;
887 }
888
889 // Allocate all required chunks.
890 _cmsAllocLogErrorChunk(ctx, src);
891 _cmsAllocAlarmCodesChunk(ctx, src);
892 _cmsAllocAdaptationStateChunk(ctx, src);
893 _cmsAllocMemPluginChunk(ctx, src);
894 _cmsAllocInterpPluginChunk(ctx, src);
895 _cmsAllocCurvesPluginChunk(ctx, src);
896 _cmsAllocFormattersPluginChunk(ctx, src);
897 _cmsAllocTagTypePluginChunk(ctx, src);
898 _cmsAllocMPETypePluginChunk(ctx, src);
899 _cmsAllocTagPluginChunk(ctx, src);
900 _cmsAllocIntentsPluginChunk(ctx, src);
901 _cmsAllocOptimizationPluginChunk(ctx, src);
902 _cmsAllocTransformPluginChunk(ctx, src);
903 _cmsAllocMutexPluginChunk(ctx, src);
904
905 // Make sure no one failed
906 for (i=Logger; i < MemoryClientMax; i++) {
907
908 if (src ->chunks[i] == NULL) {
909 cmsDeleteContext((cmsContext) ctx);
910 return NULL;
911 }
912 }
913
914 return (cmsContext) ctx;
915 }
916
917
918 /*
919 static
920 struct _cmsContext_struct* FindPrev(struct _cmsContext_struct* id)
921 {
922 struct _cmsContext_struct* prev;
923
924 // Search for previous
925 for (prev = _cmsContextPoolHead;
926 prev != NULL;
927 prev = prev ->Next)
928 {
929 if (prev ->Next == id)
930 return prev;
931 }
932
933 return NULL; // List is empty or only one element!
934 }
935 */
936
937 // Frees any resources associated with the given context,
938 // and destroys the context placeholder.
939 // The ContextID can no longer be used in any THR operation.
940 void CMSEXPORT cmsDeleteContext(cmsContext ContextID)
941 {
942 if (ContextID != NULL) {
943
944 struct _cmsContext_struct* ctx = (struct _cmsContext_struct*) ContextID;
945 struct _cmsContext_struct fakeContext;
946 struct _cmsContext_struct* prev;
947
948 memcpy(&fakeContext.DefaultMemoryManager, &ctx->DefaultMemoryManager, sizeof(ctx->DefaultMemoryManager));
949
950 fakeContext.chunks[UserPtr] = ctx ->chunks[UserPtr];
951 fakeContext.chunks[MemPlugin] = &fakeContext.DefaultMemoryManager;
952
953 // Get rid of plugins
954 cmsUnregisterPluginsTHR(ContextID);
955
956 // Since all memory is allocated in the private pool, all what we need to do is destroy the pool
957 if (ctx -> MemPool != NULL)
958 _cmsSubAllocDestroy(ctx ->MemPool);
959 ctx -> MemPool = NULL;
960
961 // Maintain list
962 _cmsEnterCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
963 if (_cmsContextPoolHead == ctx) {
964
965 _cmsContextPoolHead = ctx->Next;
966 }
967 else {
968
969 // Search for previous
970 for (prev = _cmsContextPoolHead;
971 prev != NULL;
972 prev = prev ->Next)
973 {
974 if (prev -> Next == ctx) {
975 prev -> Next = ctx ->Next;
976 break;
977 }
978 }
979 }
980 _cmsLeaveCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
981
982 // free the memory block itself
983 _cmsFree(&fakeContext, ctx);
984 }
985 }
986
987 // Returns the user data associated to the given ContextID, or NULL if no user data was attached on context creation
988 void* CMSEXPORT cmsGetContextUserData(cmsContext ContextID)
989 {
990 return _cmsContextGetClientChunk(ContextID, UserPtr);
991 }
992
993