This file is indexed.

/usr/include/lcms2_plugin.h is in liblcms2-dev 2.8-4+deb9u1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
//---------------------------------------------------------------------------------
//
//  Little Color Management System
//  Copyright (c) 1998-2016 Marti Maria Saguer
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//---------------------------------------------------------------------------------
//
// This is the plug-in header file. Normal LittleCMS clients should not use it.
// It is provided for plug-in writters that may want to access the support
// functions to do low level operations. All plug-in related structures
// are defined here. Including this file forces to include the standard API too.

#ifndef _lcms_plugin_H

// Deal with Microsoft's attempt at deprecating C standard runtime functions
#ifdef _MSC_VER
#    if (_MSC_VER >= 1400)
#      ifndef _CRT_SECURE_NO_DEPRECATE
#        define _CRT_SECURE_NO_DEPRECATE
#      endif
#      ifndef _CRT_SECURE_NO_WARNINGS
#        define _CRT_SECURE_NO_WARNINGS
#      endif
#    endif
#endif

#ifndef _lcms2_H
#include "lcms2.h"
#endif

// We need some standard C functions.
#include <stdlib.h>
#include <math.h>
#include <stdarg.h>
#include <memory.h>
#include <string.h>


#ifndef CMS_USE_CPP_API
#   ifdef __cplusplus
extern "C" {
#   endif
#endif

// Vector & Matrix operations -----------------------------------------------------------------------

// Axis of the matrix/array. No specific meaning at all.
#define VX      0
#define VY      1
#define VZ      2

// Vectors
typedef struct {
    cmsFloat64Number n[3];

    } cmsVEC3;

// 3x3 Matrix
typedef struct {
    cmsVEC3 v[3];

    } cmsMAT3;

CMSAPI void               CMSEXPORT _cmsVEC3init(cmsVEC3* r, cmsFloat64Number x, cmsFloat64Number y, cmsFloat64Number z);
CMSAPI void               CMSEXPORT _cmsVEC3minus(cmsVEC3* r, const cmsVEC3* a, const cmsVEC3* b);
CMSAPI void               CMSEXPORT _cmsVEC3cross(cmsVEC3* r, const cmsVEC3* u, const cmsVEC3* v);
CMSAPI cmsFloat64Number   CMSEXPORT _cmsVEC3dot(const cmsVEC3* u, const cmsVEC3* v);
CMSAPI cmsFloat64Number   CMSEXPORT _cmsVEC3length(const cmsVEC3* a);
CMSAPI cmsFloat64Number   CMSEXPORT _cmsVEC3distance(const cmsVEC3* a, const cmsVEC3* b);

CMSAPI void               CMSEXPORT _cmsMAT3identity(cmsMAT3* a);
CMSAPI cmsBool            CMSEXPORT _cmsMAT3isIdentity(const cmsMAT3* a);
CMSAPI void               CMSEXPORT _cmsMAT3per(cmsMAT3* r, const cmsMAT3* a, const cmsMAT3* b);
CMSAPI cmsBool            CMSEXPORT _cmsMAT3inverse(const cmsMAT3* a, cmsMAT3* b);
CMSAPI cmsBool            CMSEXPORT _cmsMAT3solve(cmsVEC3* x, cmsMAT3* a, cmsVEC3* b);
CMSAPI void               CMSEXPORT _cmsMAT3eval(cmsVEC3* r, const cmsMAT3* a, const cmsVEC3* v);


// Error logging  -------------------------------------------------------------------------------------

CMSAPI void               CMSEXPORT  cmsSignalError(cmsContext ContextID, cmsUInt32Number ErrorCode, const char *ErrorText, ...);

// Memory management ----------------------------------------------------------------------------------

CMSAPI void*              CMSEXPORT _cmsMalloc(cmsContext ContextID, cmsUInt32Number size);
CMSAPI void*              CMSEXPORT _cmsMallocZero(cmsContext ContextID, cmsUInt32Number size);
CMSAPI void*              CMSEXPORT _cmsCalloc(cmsContext ContextID, cmsUInt32Number num, cmsUInt32Number size);
CMSAPI void*              CMSEXPORT _cmsRealloc(cmsContext ContextID, void* Ptr, cmsUInt32Number NewSize);
CMSAPI void               CMSEXPORT _cmsFree(cmsContext ContextID, void* Ptr);
CMSAPI void*              CMSEXPORT _cmsDupMem(cmsContext ContextID, const void* Org, cmsUInt32Number size);

// I/O handler ----------------------------------------------------------------------------------

struct _cms_io_handler {

    void* stream;   // Associated stream, which is implemented differently depending on media.

    cmsContext        ContextID;
    cmsUInt32Number   UsedSpace;
    cmsUInt32Number   ReportedSize;
    char              PhysicalFile[cmsMAX_PATH];

    cmsUInt32Number   (* Read)(struct _cms_io_handler* iohandler, void *Buffer,
                                                                  cmsUInt32Number size,
                                                                  cmsUInt32Number count);
    cmsBool           (* Seek)(struct _cms_io_handler* iohandler, cmsUInt32Number offset);
    cmsBool           (* Close)(struct _cms_io_handler* iohandler);
    cmsUInt32Number   (* Tell)(struct _cms_io_handler* iohandler);
    cmsBool           (* Write)(struct _cms_io_handler* iohandler, cmsUInt32Number size,
                                                                   const void* Buffer);
};

// Endianness adjust functions
CMSAPI cmsUInt16Number   CMSEXPORT  _cmsAdjustEndianess16(cmsUInt16Number Word);
CMSAPI cmsUInt32Number   CMSEXPORT  _cmsAdjustEndianess32(cmsUInt32Number Value);
CMSAPI void              CMSEXPORT  _cmsAdjustEndianess64(cmsUInt64Number* Result, cmsUInt64Number* QWord);

// Helper IO functions
CMSAPI cmsBool           CMSEXPORT  _cmsReadUInt8Number(cmsIOHANDLER* io,  cmsUInt8Number* n);
CMSAPI cmsBool           CMSEXPORT  _cmsReadUInt16Number(cmsIOHANDLER* io, cmsUInt16Number* n);
CMSAPI cmsBool           CMSEXPORT  _cmsReadUInt32Number(cmsIOHANDLER* io, cmsUInt32Number* n);
CMSAPI cmsBool           CMSEXPORT  _cmsReadFloat32Number(cmsIOHANDLER* io, cmsFloat32Number* n);
CMSAPI cmsBool           CMSEXPORT  _cmsReadUInt64Number(cmsIOHANDLER* io, cmsUInt64Number* n);
CMSAPI cmsBool           CMSEXPORT  _cmsRead15Fixed16Number(cmsIOHANDLER* io, cmsFloat64Number* n);
CMSAPI cmsBool           CMSEXPORT  _cmsReadXYZNumber(cmsIOHANDLER* io, cmsCIEXYZ* XYZ);
CMSAPI cmsBool           CMSEXPORT  _cmsReadUInt16Array(cmsIOHANDLER* io, cmsUInt32Number n, cmsUInt16Number* Array);

CMSAPI cmsBool           CMSEXPORT  _cmsWriteUInt8Number(cmsIOHANDLER* io, cmsUInt8Number n);
CMSAPI cmsBool           CMSEXPORT  _cmsWriteUInt16Number(cmsIOHANDLER* io, cmsUInt16Number n);
CMSAPI cmsBool           CMSEXPORT  _cmsWriteUInt32Number(cmsIOHANDLER* io, cmsUInt32Number n);
CMSAPI cmsBool           CMSEXPORT  _cmsWriteFloat32Number(cmsIOHANDLER* io, cmsFloat32Number n);
CMSAPI cmsBool           CMSEXPORT  _cmsWriteUInt64Number(cmsIOHANDLER* io, cmsUInt64Number* n);
CMSAPI cmsBool           CMSEXPORT  _cmsWrite15Fixed16Number(cmsIOHANDLER* io, cmsFloat64Number n);
CMSAPI cmsBool           CMSEXPORT  _cmsWriteXYZNumber(cmsIOHANDLER* io, const cmsCIEXYZ* XYZ);
CMSAPI cmsBool           CMSEXPORT  _cmsWriteUInt16Array(cmsIOHANDLER* io, cmsUInt32Number n, const cmsUInt16Number* Array);

// ICC base tag
typedef struct {
    cmsTagTypeSignature  sig;
    cmsInt8Number        reserved[4];

} _cmsTagBase;

// Type base helper functions
CMSAPI cmsTagTypeSignature  CMSEXPORT _cmsReadTypeBase(cmsIOHANDLER* io);
CMSAPI cmsBool              CMSEXPORT _cmsWriteTypeBase(cmsIOHANDLER* io, cmsTagTypeSignature sig);

// Alignment functions
CMSAPI cmsBool             CMSEXPORT _cmsReadAlignment(cmsIOHANDLER* io);
CMSAPI cmsBool             CMSEXPORT _cmsWriteAlignment(cmsIOHANDLER* io);

// To deal with text streams. 2K at most
CMSAPI cmsBool             CMSEXPORT _cmsIOPrintf(cmsIOHANDLER* io, const char* frm, ...);

// Fixed point helper functions
CMSAPI cmsFloat64Number    CMSEXPORT _cms8Fixed8toDouble(cmsUInt16Number fixed8);
CMSAPI cmsUInt16Number     CMSEXPORT _cmsDoubleTo8Fixed8(cmsFloat64Number val);

CMSAPI cmsFloat64Number    CMSEXPORT _cms15Fixed16toDouble(cmsS15Fixed16Number fix32);
CMSAPI cmsS15Fixed16Number CMSEXPORT _cmsDoubleTo15Fixed16(cmsFloat64Number v);

// Date/time helper functions
CMSAPI void                CMSEXPORT _cmsEncodeDateTimeNumber(cmsDateTimeNumber *Dest, const struct tm *Source);
CMSAPI void                CMSEXPORT _cmsDecodeDateTimeNumber(const cmsDateTimeNumber *Source, struct tm *Dest);

//----------------------------------------------------------------------------------------------------------

// Shared callbacks for user data
typedef void     (* _cmsFreeUserDataFn)(cmsContext ContextID, void* Data);
typedef void*    (* _cmsDupUserDataFn)(cmsContext ContextID, const void* Data);

//----------------------------------------------------------------------------------------------------------

// Plug-in foundation
#define cmsPluginMagicNumber                 0x61637070     // 'acpp'

#define cmsPluginMemHandlerSig               0x6D656D48     // 'memH'
#define cmsPluginInterpolationSig            0x696E7048     // 'inpH'
#define cmsPluginParametricCurveSig          0x70617248     // 'parH'
#define cmsPluginFormattersSig               0x66726D48     // 'frmH
#define cmsPluginTagTypeSig                  0x74797048     // 'typH'
#define cmsPluginTagSig                      0x74616748     // 'tagH'
#define cmsPluginRenderingIntentSig          0x696E7448     // 'intH'
#define cmsPluginMultiProcessElementSig      0x6D706548     // 'mpeH'
#define cmsPluginOptimizationSig             0x6F707448     // 'optH'
#define cmsPluginTransformSig                0x7A666D48     // 'xfmH'
#define cmsPluginMutexSig                    0x6D747A48     // 'mtxH'

typedef struct _cmsPluginBaseStruct {

        cmsUInt32Number                Magic;               // 'acpp' signature
        cmsUInt32Number                ExpectedVersion;     // Expected version of LittleCMS
        cmsUInt32Number                Type;                // Type of plug-in
        struct _cmsPluginBaseStruct*   Next;                // For multiple plugin definition. NULL for end of list.

} cmsPluginBase;

// Maximum number of types in a plugin array
#define MAX_TYPES_IN_LCMS_PLUGIN    20

//----------------------------------------------------------------------------------------------------------

// Memory handler. Each new plug-in type replaces current behaviour

typedef void* (* _cmsMallocFnPtrType)(cmsContext ContextID, cmsUInt32Number size); 
typedef void  (* _cmsFreeFnPtrType)(cmsContext ContextID, void *Ptr);
typedef void* (* _cmsReallocFnPtrType)(cmsContext ContextID, void* Ptr, cmsUInt32Number NewSize);

typedef void* (* _cmsMalloZerocFnPtrType)(cmsContext ContextID, cmsUInt32Number size); 
typedef void* (* _cmsCallocFnPtrType)(cmsContext ContextID, cmsUInt32Number num, cmsUInt32Number size);
typedef void* (* _cmsDupFnPtrType)(cmsContext ContextID, const void* Org, cmsUInt32Number size);

typedef struct {

        cmsPluginBase base;

        // Required
        _cmsMallocFnPtrType  MallocPtr;
        _cmsFreeFnPtrType    FreePtr;
        _cmsReallocFnPtrType ReallocPtr;

        // Optional
       _cmsMalloZerocFnPtrType MallocZeroPtr;
       _cmsCallocFnPtrType     CallocPtr;
       _cmsDupFnPtrType        DupPtr;

} cmsPluginMemHandler;


// ------------------------------------------------------------------------------------------------------------------

// Interpolation. 16 bits and floating point versions.
struct _cms_interp_struc;

// Interpolation callbacks

// 16 bits forward interpolation. This function performs precision-limited linear interpolation
// and is supposed to be quite fast. Implementation may be tetrahedral or trilinear, and plug-ins may
// choose to implement any other interpolation algorithm.
typedef void (* _cmsInterpFn16)(register const cmsUInt16Number Input[],
                                register cmsUInt16Number Output[],
                                register const struct _cms_interp_struc* p);

// Floating point forward interpolation. Full precision interpolation using floats. This is not a
// time critical function. Implementation may be tetrahedral or trilinear, and plug-ins may
// choose to implement any other interpolation algorithm.
typedef void (* _cmsInterpFnFloat)(cmsFloat32Number const Input[],
                                   cmsFloat32Number Output[],
                                   const struct _cms_interp_struc* p);



// This type holds a pointer to an interpolator that can be either 16 bits or float
typedef union {
    _cmsInterpFn16       Lerp16;            // Forward interpolation in 16 bits
    _cmsInterpFnFloat    LerpFloat;         // Forward interpolation in floating point
} cmsInterpFunction;

// Flags for interpolator selection
#define CMS_LERP_FLAGS_16BITS             0x0000        // The default
#define CMS_LERP_FLAGS_FLOAT              0x0001        // Requires different implementation
#define CMS_LERP_FLAGS_TRILINEAR          0x0100        // Hint only


#define MAX_INPUT_DIMENSIONS 8

typedef struct _cms_interp_struc {  // Used on all interpolations. Supplied by lcms2 when calling the interpolation function

    cmsContext ContextID;     // The calling thread

    cmsUInt32Number dwFlags;  // Keep original flags
    cmsUInt32Number nInputs;  // != 1 only in 3D interpolation
    cmsUInt32Number nOutputs; // != 1 only in 3D interpolation

    cmsUInt32Number nSamples[MAX_INPUT_DIMENSIONS];  // Valid on all kinds of tables
    cmsUInt32Number Domain[MAX_INPUT_DIMENSIONS];    // Domain = nSamples - 1

    cmsUInt32Number opta[MAX_INPUT_DIMENSIONS];     // Optimization for 3D CLUT. This is the number of nodes premultiplied for each
                                                    // dimension. For example, in 7 nodes, 7, 7^2 , 7^3, 7^4, etc. On non-regular
                                                    // Samplings may vary according of the number of nodes for each dimension.

    const void *Table;                // Points to the actual interpolation table
    cmsInterpFunction Interpolation;  // Points to the function to do the interpolation

 } cmsInterpParams;

// Interpolators factory
typedef cmsInterpFunction (* cmsInterpFnFactory)(cmsUInt32Number nInputChannels, cmsUInt32Number nOutputChannels, cmsUInt32Number dwFlags);

// The plug-in
typedef struct {
    cmsPluginBase base;

    // Points to a user-supplied function which implements the factory
    cmsInterpFnFactory InterpolatorsFactory;

} cmsPluginInterpolation;

//----------------------------------------------------------------------------------------------------------

// Parametric curves. A negative type means same function but analytically inverted. Max. number of params is 10

// Evaluator callback for user-suplied parametric curves. May implement more than one type
typedef  cmsFloat64Number (* cmsParametricCurveEvaluator)(cmsInt32Number Type, const cmsFloat64Number Params[10], cmsFloat64Number R);

// Plug-in may implement an arbitrary number of parametric curves
typedef struct {
    cmsPluginBase base;

    cmsUInt32Number nFunctions;                                     // Number of supported functions
    cmsUInt32Number FunctionTypes[MAX_TYPES_IN_LCMS_PLUGIN];        // The identification types
    cmsUInt32Number ParameterCount[MAX_TYPES_IN_LCMS_PLUGIN];       // Number of parameters for each function

    cmsParametricCurveEvaluator    Evaluator;                       // The evaluator

} cmsPluginParametricCurves;
//----------------------------------------------------------------------------------------------------------

// Formatters. This plug-in adds new handlers, replacing them if they already exist. Formatters dealing with
// cmsFloat32Number (bps = 4) or double (bps = 0) types are requested via FormatterFloat callback. Others come across
// Formatter16 callback

struct _cmstransform_struct;

typedef cmsUInt8Number* (* cmsFormatter16)(register struct _cmstransform_struct* CMMcargo,
                                           register cmsUInt16Number Values[],
                                           register cmsUInt8Number* Buffer,
                                           register cmsUInt32Number Stride);

typedef cmsUInt8Number* (* cmsFormatterFloat)(struct _cmstransform_struct* CMMcargo,
                                              cmsFloat32Number Values[],
                                              cmsUInt8Number*  Buffer,
                                              cmsUInt32Number  Stride);

// This type holds a pointer to a formatter that can be either 16 bits or cmsFloat32Number
typedef union {
    cmsFormatter16    Fmt16;
    cmsFormatterFloat FmtFloat;

} cmsFormatter;

#define CMS_PACK_FLAGS_16BITS       0x0000
#define CMS_PACK_FLAGS_FLOAT        0x0001

typedef enum { cmsFormatterInput=0, cmsFormatterOutput=1 } cmsFormatterDirection;

typedef cmsFormatter (* cmsFormatterFactory)(cmsUInt32Number Type,           // Specific type, i.e. TYPE_RGB_8
                                             cmsFormatterDirection Dir,
                                             cmsUInt32Number dwFlags);      // precision

// Plug-in may implement an arbitrary number of formatters
typedef struct {
    cmsPluginBase          base;
    cmsFormatterFactory    FormattersFactory;

} cmsPluginFormatters;

//----------------------------------------------------------------------------------------------------------

// Tag type handler. Each type is free to return anything it wants, and it is up to the caller to
// know in advance what is the type contained in the tag.
typedef struct _cms_typehandler_struct {

        cmsTagTypeSignature Signature;     // The signature of the type

        // Allocates and reads items
        void *   (* ReadPtr)(struct _cms_typehandler_struct* self,
                             cmsIOHANDLER*      io,
                             cmsUInt32Number*   nItems,
                             cmsUInt32Number    SizeOfTag);

        // Writes n Items
        cmsBool  (* WritePtr)(struct _cms_typehandler_struct* self,
                              cmsIOHANDLER*     io,
                              void*             Ptr,
                              cmsUInt32Number   nItems);

        // Duplicate an item or array of items
        void*   (* DupPtr)(struct _cms_typehandler_struct* self,
                           const void *Ptr,
                           cmsUInt32Number n);

        // Free all resources
        void    (* FreePtr)(struct _cms_typehandler_struct* self,
                            void *Ptr);

        // Additional parameters used by the calling thread
        cmsContext       ContextID;
        cmsUInt32Number  ICCVersion;

} cmsTagTypeHandler;

// Each plug-in implements a single type
typedef struct {
        cmsPluginBase      base;
        cmsTagTypeHandler  Handler;

} cmsPluginTagType;

//----------------------------------------------------------------------------------------------------------

// This is the tag plugin, which identifies tags. For writing, a pointer to function is provided.
// This function should return the desired type for this tag, given the version of profile
// and the data being serialized.
typedef struct {

    cmsUInt32Number     ElemCount;          // If this tag needs an array, how many elements should keep

    // For reading.
    cmsUInt32Number     nSupportedTypes;    // In how many types this tag can come (MAX_TYPES_IN_LCMS_PLUGIN maximum)
    cmsTagTypeSignature SupportedTypes[MAX_TYPES_IN_LCMS_PLUGIN];

    // For writting
    cmsTagTypeSignature (* DecideType)(cmsFloat64Number ICCVersion, const void *Data);

} cmsTagDescriptor;

// Plug-in implements a single tag
typedef struct {
    cmsPluginBase    base;

    cmsTagSignature  Signature;
    cmsTagDescriptor Descriptor;

} cmsPluginTag;

//----------------------------------------------------------------------------------------------------------

// Custom intents. This function should join all profiles specified in the array in
// a single LUT. Any custom intent in the chain redirects to custom function. If more than
// one custom intent is found, the one located first is invoked. Usually users should use only one
// custom intent, so mixing custom intents in same multiprofile transform is not supported.

typedef cmsPipeline* (* cmsIntentFn)( cmsContext       ContextID,
                                      cmsUInt32Number  nProfiles,
                                      cmsUInt32Number  Intents[],
                                      cmsHPROFILE      hProfiles[],
                                      cmsBool          BPC[],
                                      cmsFloat64Number AdaptationStates[],
                                      cmsUInt32Number  dwFlags);


// Each plug-in defines a single intent number.
typedef struct {
    cmsPluginBase     base;
    cmsUInt32Number   Intent;
    cmsIntentFn       Link;
    char              Description[256];

} cmsPluginRenderingIntent;


// The default ICC intents (perceptual, saturation, rel.col and abs.col)
CMSAPI cmsPipeline*  CMSEXPORT _cmsDefaultICCintents(cmsContext       ContextID,
                                                     cmsUInt32Number  nProfiles,
                                                     cmsUInt32Number  Intents[],
                                                     cmsHPROFILE      hProfiles[],
                                                     cmsBool          BPC[],
                                                     cmsFloat64Number AdaptationStates[],
                                                     cmsUInt32Number  dwFlags);


//----------------------------------------------------------------------------------------------------------

// Pipelines, Multi Process Elements.

typedef void (* _cmsStageEvalFn)     (const cmsFloat32Number In[], cmsFloat32Number Out[], const cmsStage* mpe);
typedef void*(* _cmsStageDupElemFn)  (cmsStage* mpe);
typedef void (* _cmsStageFreeElemFn) (cmsStage* mpe);


// This function allocates a generic MPE
CMSAPI cmsStage* CMSEXPORT _cmsStageAllocPlaceholder(cmsContext ContextID,
                                cmsStageSignature     Type,
                                cmsUInt32Number       InputChannels,
                                cmsUInt32Number       OutputChannels,
                                _cmsStageEvalFn       EvalPtr,            // Points to fn that evaluates the element (always in floating point)
                                _cmsStageDupElemFn    DupElemPtr,         // Points to a fn that duplicates the stage
                                _cmsStageFreeElemFn   FreePtr,            // Points to a fn that sets the element free
                                void*                 Data);              // A generic pointer to whatever memory needed by the element
typedef struct {
      cmsPluginBase     base;
      cmsTagTypeHandler Handler;

}  cmsPluginMultiProcessElement;


// Data kept in "Element" member of cmsStage

// Curves
typedef struct {
    cmsUInt32Number nCurves;
    cmsToneCurve**  TheCurves;

} _cmsStageToneCurvesData;

// Matrix
typedef struct {
    cmsFloat64Number*  Double;          // floating point for the matrix
    cmsFloat64Number*  Offset;          // The offset

} _cmsStageMatrixData;

// CLUT
typedef struct {

    union {                       // Can have only one of both representations at same time
        cmsUInt16Number*  T;      // Points to the table 16 bits table
        cmsFloat32Number* TFloat; // Points to the cmsFloat32Number table

    } Tab;

    cmsInterpParams* Params;
    cmsUInt32Number  nEntries;
    cmsBool          HasFloatValues;

} _cmsStageCLutData;


//----------------------------------------------------------------------------------------------------------
// Optimization. Using this plug-in, additional optimization strategies may be implemented.
// The function should return TRUE if any optimization is done on the LUT, this terminates
// the optimization  search. Or FALSE if it is unable to optimize and want to give a chance
// to the rest of optimizers.

typedef void     (* _cmsOPTeval16Fn)(register const cmsUInt16Number In[],
                                     register cmsUInt16Number Out[],
                                     register const void* Data);


typedef cmsBool  (* _cmsOPToptimizeFn)(cmsPipeline** Lut,
                                       cmsUInt32Number  Intent,
                                       cmsUInt32Number* InputFormat,
                                       cmsUInt32Number* OutputFormat,
                                       cmsUInt32Number* dwFlags);

// This function may be used to set the optional evaluator and a block of private data. If private data is being used, an optional
// duplicator and free functions should also be specified in order to duplicate the LUT construct. Use NULL to inhibit such functionality.

CMSAPI void CMSEXPORT _cmsPipelineSetOptimizationParameters(cmsPipeline* Lut,
                                               _cmsOPTeval16Fn Eval16,
                                               void* PrivateData,
                                               _cmsFreeUserDataFn FreePrivateDataFn,
                                               _cmsDupUserDataFn DupPrivateDataFn);

typedef struct {
      cmsPluginBase     base;

      // Optimize entry point
      _cmsOPToptimizeFn  OptimizePtr;

}  cmsPluginOptimization;

//----------------------------------------------------------------------------------------------------------
// Full xform

typedef struct {
       cmsUInt32Number BytesPerLineIn;
       cmsUInt32Number BytesPerLineOut;
       cmsUInt32Number BytesPerPlaneIn;
       cmsUInt32Number BytesPerPlaneOut;

} cmsStride;

typedef void     (* _cmsTransformFn)(struct _cmstransform_struct *CMMcargo,   // Legacy function, handles just ONE scanline.
                                     const void* InputBuffer,
                                     void* OutputBuffer,
                                     cmsUInt32Number Size,
                                     cmsUInt32Number Stride);                 // Stride in bytes to the next plana in planar formats


typedef void     (*_cmsTransform2Fn)(struct _cmstransform_struct *CMMcargo,
                                     const void* InputBuffer,
                                     void* OutputBuffer,
                                     cmsUInt32Number PixelsPerLine,     
                                     cmsUInt32Number LineCount,          
                                     const cmsStride* Stride);  

typedef cmsBool  (* _cmsTransformFactory)(_cmsTransformFn* xform,
                                         void** UserData,
                                         _cmsFreeUserDataFn* FreePrivateDataFn,
                                         cmsPipeline** Lut,
                                         cmsUInt32Number* InputFormat,
                                         cmsUInt32Number* OutputFormat,
                                         cmsUInt32Number* dwFlags);

typedef cmsBool  (* _cmsTransform2Factory)(_cmsTransform2Fn* xform,
                                         void** UserData,
                                         _cmsFreeUserDataFn* FreePrivateDataFn,
                                         cmsPipeline** Lut,
                                         cmsUInt32Number* InputFormat,
                                         cmsUInt32Number* OutputFormat,
                                         cmsUInt32Number* dwFlags);


// Retrieve user data as specified by the factory
CMSAPI void   CMSEXPORT _cmsSetTransformUserData(struct _cmstransform_struct *CMMcargo, void* ptr, _cmsFreeUserDataFn FreePrivateDataFn);
CMSAPI void * CMSEXPORT _cmsGetTransformUserData(struct _cmstransform_struct *CMMcargo);


// Retrieve formatters
CMSAPI void   CMSEXPORT _cmsGetTransformFormatters16   (struct _cmstransform_struct *CMMcargo, cmsFormatter16* FromInput, cmsFormatter16* ToOutput);
CMSAPI void   CMSEXPORT _cmsGetTransformFormattersFloat(struct _cmstransform_struct *CMMcargo, cmsFormatterFloat* FromInput, cmsFormatterFloat* ToOutput);

typedef struct {
      cmsPluginBase     base;

      // Transform entry point
      union {
             _cmsTransformFactory        legacy_xform;
             _cmsTransform2Factory       xform;
      } factories;

}  cmsPluginTransform;

//----------------------------------------------------------------------------------------------------------
// Mutex 

typedef void*    (* _cmsCreateMutexFnPtrType)(cmsContext ContextID);
typedef void     (* _cmsDestroyMutexFnPtrType)(cmsContext ContextID, void* mtx);
typedef cmsBool  (* _cmsLockMutexFnPtrType)(cmsContext ContextID, void* mtx);
typedef void     (* _cmsUnlockMutexFnPtrType)(cmsContext ContextID, void* mtx);

typedef struct {
      cmsPluginBase     base;

     _cmsCreateMutexFnPtrType  CreateMutexPtr;
     _cmsDestroyMutexFnPtrType DestroyMutexPtr;
     _cmsLockMutexFnPtrType    LockMutexPtr;
     _cmsUnlockMutexFnPtrType  UnlockMutexPtr;

}  cmsPluginMutex;

CMSAPI void*   CMSEXPORT _cmsCreateMutex(cmsContext ContextID);
CMSAPI void    CMSEXPORT _cmsDestroyMutex(cmsContext ContextID, void* mtx);
CMSAPI cmsBool CMSEXPORT _cmsLockMutex(cmsContext ContextID, void* mtx);
CMSAPI void    CMSEXPORT _cmsUnlockMutex(cmsContext ContextID, void* mtx);


#ifndef CMS_USE_CPP_API
#   ifdef __cplusplus
    }
#   endif
#endif

#define _lcms_plugin_H
#endif