include/lcms2_plugin.h

   1 //---------------------------------------------------------------------------------
   2 //
   3 //  Little Color Management System
   4 //  Copyright (c) 1998-2011 Marti Maria Saguer
   5 //
   6 // Permission is hereby granted, free of charge, to any person obtaining
   7 // a copy of this software and associated documentation files (the "Software"),
   8 // to deal in the Software without restriction, including without limitation
   9 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10 // and/or sell copies of the Software, and to permit persons to whom the Software
  11 // is furnished to do so, subject to the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be included in
  14 // all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
  18 // THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24 //---------------------------------------------------------------------------------
  25 //
  26 // This is the plug-in header file. Normal LittleCMS clients should not use it.
  27 // It is provided for plug-in writters that may want to access the support
  28 // functions to do low level operations. All plug-in related structures
  29 // are defined here. Including this file forces to include the standard API too.
  30
  31 #ifndef _lcms_plugin_H
  32
  33 // Deal with Microsoft's attempt at deprecating C standard runtime functions
  34 #ifdef _MSC_VER
  35 #    if (_MSC_VER >= 1400)
  36 #      ifndef _CRT_SECURE_NO_DEPRECATE
  37 #        define _CRT_SECURE_NO_DEPRECATE
  38 #      endif
  39 #      ifndef _CRT_SECURE_NO_WARNINGS
  40 #        define _CRT_SECURE_NO_WARNINGS
  41 #      endif
  42 #    endif
  43 #endif
  44
  45 #ifndef _lcms2_H
  46 #include "lcms2.h"
  47 #endif
  48
  49 // We need some standard C functions.
  50 #include <stdlib.h>
  51 #include <math.h>
  52 #include <stdarg.h>
  53 #include <memory.h>
  54 #include <string.h>
  55
  56
  57 #ifndef CMS_USE_CPP_API
  58 #   ifdef __cplusplus
  59 extern "C" {
  60 #   endif
  61 #endif
  62
  63 // Vector & Matrix operations -----------------------------------------------------------------------
  64
  65 // Axis of the matrix/array. No specific meaning at all.
  66 #define VX      0
  67 #define VY      1
  68 #define VZ      2
  69
  70 // Vectors
  71 typedef struct {
  72     cmsFloat64Number n[3];
  73
  74     } cmsVEC3;
  75
  76 // 3x3 Matrix
  77 typedef struct {
  78     cmsVEC3 v[3];
  79
  80     } cmsMAT3;
  81
  82 CMSAPI void               CMSEXPORT _cmsVEC3init(cmsVEC3* r, cmsFloat64Number x, cmsFloat64Number y, cmsFloat64Number z);
  83 CMSAPI void               CMSEXPORT _cmsVEC3minus(cmsVEC3* r, const cmsVEC3* a, const cmsVEC3* b);
  84 CMSAPI void               CMSEXPORT _cmsVEC3cross(cmsVEC3* r, const cmsVEC3* u, const cmsVEC3* v);
  85 CMSAPI cmsFloat64Number   CMSEXPORT _cmsVEC3dot(const cmsVEC3* u, const cmsVEC3* v);
  86 CMSAPI cmsFloat64Number   CMSEXPORT _cmsVEC3length(const cmsVEC3* a);
  87 CMSAPI cmsFloat64Number   CMSEXPORT _cmsVEC3distance(const cmsVEC3* a, const cmsVEC3* b);
  88
  89 CMSAPI void               CMSEXPORT _cmsMAT3identity(cmsMAT3* a);
  90 CMSAPI cmsBool            CMSEXPORT _cmsMAT3isIdentity(const cmsMAT3* a);
  91 CMSAPI void               CMSEXPORT _cmsMAT3per(cmsMAT3* r, const cmsMAT3* a, const cmsMAT3* b);
  92 CMSAPI cmsBool            CMSEXPORT _cmsMAT3inverse(const cmsMAT3* a, cmsMAT3* b);
  93 CMSAPI cmsBool            CMSEXPORT _cmsMAT3solve(cmsVEC3* x, cmsMAT3* a, cmsVEC3* b);
  94 CMSAPI void               CMSEXPORT _cmsMAT3eval(cmsVEC3* r, const cmsMAT3* a, const cmsVEC3* v);
  95
  96
  97 // Error logging  -------------------------------------------------------------------------------------
  98
  99 CMSAPI void               CMSEXPORT  cmsSignalError(cmsContext ContextID, cmsUInt32Number ErrorCode, const char *ErrorText, ...);
 100
 101 // Memory management ----------------------------------------------------------------------------------
 102
 103 CMSAPI void*              CMSEXPORT _cmsMalloc(cmsContext ContextID, cmsUInt32Number size);
 104 CMSAPI void*              CMSEXPORT _cmsMallocZero(cmsContext ContextID, cmsUInt32Number size);
 105 CMSAPI void*              CMSEXPORT _cmsCalloc(cmsContext ContextID, cmsUInt32Number num, cmsUInt32Number size);
 106 CMSAPI void*              CMSEXPORT _cmsRealloc(cmsContext ContextID, void* Ptr, cmsUInt32Number NewSize);
 107 CMSAPI void               CMSEXPORT _cmsFree(cmsContext ContextID, void* Ptr);
 108 CMSAPI void*              CMSEXPORT _cmsDupMem(cmsContext ContextID, const void* Org, cmsUInt32Number size);
 109
 110 // I/O handler ----------------------------------------------------------------------------------
 111
 112 struct _cms_io_handler {
 113
 114     void* stream;   // Associated stream, which is implemented differently depending on media.
 115
 116     cmsContext        ContextID;
 117     cmsUInt32Number   UsedSpace;
 118     cmsUInt32Number   ReportedSize;
 119     char              PhysicalFile[cmsMAX_PATH];
 120
 121     cmsUInt32Number   (* Read)(struct _cms_io_handler* iohandler, void *Buffer,
 122                                                                   cmsUInt32Number size,
 123                                                                   cmsUInt32Number count);
 124     cmsBool           (* Seek)(struct _cms_io_handler* iohandler, cmsUInt32Number offset);
 125     cmsBool           (* Close)(struct _cms_io_handler* iohandler);
 126     cmsUInt32Number   (* Tell)(struct _cms_io_handler* iohandler);
 127     cmsBool           (* Write)(struct _cms_io_handler* iohandler, cmsUInt32Number size,
 128                                                                    const void* Buffer);
 129 };
 130
 131 // Endianess adjust functions
 132 CMSAPI cmsUInt16Number   CMSEXPORT  _cmsAdjustEndianess16(cmsUInt16Number Word);
 133 CMSAPI cmsUInt32Number   CMSEXPORT  _cmsAdjustEndianess32(cmsUInt32Number Value);
 134 CMSAPI void              CMSEXPORT  _cmsAdjustEndianess64(cmsUInt64Number* Result, cmsUInt64Number QWord);
 135
 136 // Helper IO functions
 137 CMSAPI cmsBool           CMSEXPORT  _cmsReadUInt8Number(cmsIOHANDLER* io,  cmsUInt8Number* n);
 138 CMSAPI cmsBool           CMSEXPORT  _cmsReadUInt16Number(cmsIOHANDLER* io, cmsUInt16Number* n);
 139 CMSAPI cmsBool           CMSEXPORT  _cmsReadUInt32Number(cmsIOHANDLER* io, cmsUInt32Number* n);
 140 CMSAPI cmsBool           CMSEXPORT  _cmsReadFloat32Number(cmsIOHANDLER* io, cmsFloat32Number* n);
 141 CMSAPI cmsBool           CMSEXPORT  _cmsReadUInt64Number(cmsIOHANDLER* io, cmsUInt64Number* n);
 142 CMSAPI cmsBool           CMSEXPORT  _cmsRead15Fixed16Number(cmsIOHANDLER* io, cmsFloat64Number* n);
 143 CMSAPI cmsBool           CMSEXPORT  _cmsReadXYZNumber(cmsIOHANDLER* io, cmsCIEXYZ* XYZ);
 144 CMSAPI cmsBool           CMSEXPORT  _cmsReadUInt16Array(cmsIOHANDLER* io, cmsUInt32Number n, cmsUInt16Number* Array);
 145
 146 CMSAPI cmsBool           CMSEXPORT  _cmsWriteUInt8Number(cmsIOHANDLER* io, cmsUInt8Number n);
 147 CMSAPI cmsBool           CMSEXPORT  _cmsWriteUInt16Number(cmsIOHANDLER* io, cmsUInt16Number n);
 148 CMSAPI cmsBool           CMSEXPORT  _cmsWriteUInt32Number(cmsIOHANDLER* io, cmsUInt32Number n);
 149 CMSAPI cmsBool           CMSEXPORT  _cmsWriteFloat32Number(cmsIOHANDLER* io, cmsFloat32Number n);
 150 CMSAPI cmsBool           CMSEXPORT  _cmsWriteUInt64Number(cmsIOHANDLER* io, cmsUInt64Number n);
 151 CMSAPI cmsBool           CMSEXPORT  _cmsWrite15Fixed16Number(cmsIOHANDLER* io, cmsFloat64Number n);
 152 CMSAPI cmsBool           CMSEXPORT  _cmsWriteXYZNumber(cmsIOHANDLER* io, const cmsCIEXYZ* XYZ);
 153 CMSAPI cmsBool           CMSEXPORT  _cmsWriteUInt16Array(cmsIOHANDLER* io, cmsUInt32Number n, const cmsUInt16Number* Array);
 154
 155 // ICC base tag
 156 typedef struct {
 157     cmsTagTypeSignature  sig;
 158     cmsInt8Number        reserved[4];
 159
 160 } _cmsTagBase;
 161
 162 // Type base helper functions
 163 CMSAPI cmsTagTypeSignature  CMSEXPORT _cmsReadTypeBase(cmsIOHANDLER* io);
 164 CMSAPI cmsBool              CMSEXPORT _cmsWriteTypeBase(cmsIOHANDLER* io, cmsTagTypeSignature sig);
 165
 166 // Alignment functions
 167 CMSAPI cmsBool             CMSEXPORT _cmsReadAlignment(cmsIOHANDLER* io);
 168 CMSAPI cmsBool             CMSEXPORT _cmsWriteAlignment(cmsIOHANDLER* io);
 169
 170 // To deal with text streams. 2K at most
 171 CMSAPI cmsBool             CMSEXPORT _cmsIOPrintf(cmsIOHANDLER* io, const char* frm, ...);
 172
 173 // Fixed point helper functions
 174 CMSAPI cmsFloat64Number    CMSEXPORT _cms8Fixed8toDouble(cmsUInt16Number fixed8);
 175 CMSAPI cmsUInt16Number     CMSEXPORT _cmsDoubleTo8Fixed8(cmsFloat64Number val);
 176
 177 CMSAPI cmsFloat64Number    CMSEXPORT _cms15Fixed16toDouble(cmsS15Fixed16Number fix32);
 178 CMSAPI cmsS15Fixed16Number CMSEXPORT _cmsDoubleTo15Fixed16(cmsFloat64Number v);
 179
 180 // Date/time helper functions
 181 CMSAPI void                CMSEXPORT _cmsEncodeDateTimeNumber(cmsDateTimeNumber *Dest, const struct tm *Source);
 182 CMSAPI void                CMSEXPORT _cmsDecodeDateTimeNumber(const cmsDateTimeNumber *Source, struct tm *Dest);
 183
 184
 185 //----------------------------------------------------------------------------------------------------------
 186
 187 // Plug-in foundation
 188 #define cmsPluginMagicNumber                 0x61637070     // 'acpp'
 189
 190 #define cmsPluginMemHandlerSig               0x6D656D48     // 'memH'
 191 #define cmsPluginInterpolationSig            0x696E7048     // 'inpH'
 192 #define cmsPluginParametricCurveSig          0x70617248     // 'parH'
 193 #define cmsPluginFormattersSig               0x66726D48     // 'frmH
 194 #define cmsPluginTagTypeSig                  0x74797048     // 'typH'
 195 #define cmsPluginTagSig                      0x74616748     // 'tagH'
 196 #define cmsPluginRenderingIntentSig          0x696E7448     // 'intH'
 197 #define cmsPluginMultiProcessElementSig      0x6D706548     // 'mpeH'
 198 #define cmsPluginOptimizationSig             0x6F707448     // 'optH'
 199
 200 typedef struct _cmsPluginBaseStruct {
 201
 202         cmsUInt32Number                Magic;               // 'acpp' signature
 203         cmsUInt32Number                ExpectedVersion;     // Expected version of LittleCMS
 204         cmsUInt32Number                Type;                // Type of plug-in
 205         struct _cmsPluginBaseStruct*   Next;                // For multiple plugin definition. NULL for end of list.
 206
 207 } cmsPluginBase;
 208
 209 // Maximum number of types in a plugin array
 210 #define MAX_TYPES_IN_LCMS_PLUGIN    20
 211
 212 //----------------------------------------------------------------------------------------------------------
 213
 214 // Memory handler. Each new plug-in type replaces current behaviour
 215 typedef struct {
 216
 217         cmsPluginBase base;
 218
 219         // Required
 220         void * (* MallocPtr)(cmsContext ContextID, cmsUInt32Number size);
 221         void   (* FreePtr)(cmsContext ContextID, void *Ptr);
 222         void * (* ReallocPtr)(cmsContext ContextID, void* Ptr, cmsUInt32Number NewSize);
 223
 224         // Optional
 225         void * (* MallocZeroPtr)(cmsContext ContextID, cmsUInt32Number size);
 226         void * (* CallocPtr)(cmsContext ContextID, cmsUInt32Number num, cmsUInt32Number size);
 227         void * (* DupPtr)(cmsContext ContextID, const void* Org, cmsUInt32Number size);
 228
 229 } cmsPluginMemHandler;
 230
 231
 232 // ------------------------------------------------------------------------------------------------------------------
 233
 234 // Interpolation. 16 bits and floating point versions.
 235 struct _cms_interp_struc;
 236
 237 // Interpolation callbacks
 238
 239 // 16 bits forward interpolation. This function performs precision-limited linear interpolation
 240 // and is supposed to be quite fast. Implementation may be tetrahedral or trilinear, and plug-ins may
 241 // choose to implement any other interpolation algorithm.
 242 typedef void (* _cmsInterpFn16)(register const cmsUInt16Number Input[],
 243                                 register cmsUInt16Number Output[],
 244                                 register const struct _cms_interp_struc* p);
 245
 246 // Floating point forward interpolation. Full precision interpolation using floats. This is not a
 247 // time critical function. Implementation may be tetrahedral or trilinear, and plug-ins may
 248 // choose to implement any other interpolation algorithm.
 249 typedef void (* _cmsInterpFnFloat)(cmsFloat32Number const Input[],
 250                                    cmsFloat32Number Output[],
 251                                    const struct _cms_interp_struc* p);
 252
 253
 254
 255 // This type holds a pointer to an interpolator that can be either 16 bits or float
 256 typedef union {
 257     _cmsInterpFn16       Lerp16;            // Forward interpolation in 16 bits
 258     _cmsInterpFnFloat    LerpFloat;         // Forward interpolation in floating point
 259 } cmsInterpFunction;
 260
 261 // Flags for interpolator selection
 262 #define CMS_LERP_FLAGS_16BITS             0x0000        // The default
 263 #define CMS_LERP_FLAGS_FLOAT              0x0001        // Requires different implementation
 264 #define CMS_LERP_FLAGS_TRILINEAR          0x0100        // Hint only
 265
 266
 267 #define MAX_INPUT_DIMENSIONS 8
 268
 269 typedef struct _cms_interp_struc {  // Used on all interpolations. Supplied by lcms2 when calling the interpolation function
 270
 271     cmsContext ContextID;     // The calling thread
 272
 273     cmsUInt32Number dwFlags;  // Keep original flags
 274     cmsUInt32Number nInputs;  // != 1 only in 3D interpolation
 275     cmsUInt32Number nOutputs; // != 1 only in 3D interpolation
 276
 277     cmsUInt32Number nSamples[MAX_INPUT_DIMENSIONS];  // Valid on all kinds of tables
 278     cmsUInt32Number Domain[MAX_INPUT_DIMENSIONS];    // Domain = nSamples - 1
 279
 280     cmsUInt32Number opta[MAX_INPUT_DIMENSIONS];     // Optimization for 3D CLUT. This is the number of nodes premultiplied for each
 281                                                     // dimension. For example, in 7 nodes, 7, 7^2 , 7^3, 7^4, etc. On non-regular
 282                                                     // Samplings may vary according of the number of nodes for each dimension.
 283
 284     const void *Table;                // Points to the actual interpolation table
 285     cmsInterpFunction Interpolation;  // Points to the function to do the interpolation
 286
 287  } cmsInterpParams;
 288
 289 // Interpolators factory
 290 typedef cmsInterpFunction (* cmsInterpFnFactory)(cmsUInt32Number nInputChannels, cmsUInt32Number nOutputChannels, cmsUInt32Number dwFlags);
 291
 292 // The plug-in
 293 typedef struct {
 294     cmsPluginBase base;
 295
 296     // Points to a user-supplied function which implements the factory
 297     cmsInterpFnFactory InterpolatorsFactory;
 298
 299 } cmsPluginInterpolation;
 300
 301 //----------------------------------------------------------------------------------------------------------
 302
 303 // Parametric curves. A negative type means same function but analytically inverted. Max. number of params is 10
 304
 305 // Evaluator callback for user-suplied parametric curves. May implement more than one type
 306 typedef  cmsFloat64Number (* cmsParametricCurveEvaluator)(cmsInt32Number Type, const cmsFloat64Number Params[10], cmsFloat64Number R);
 307
 308 // Plug-in may implement an arbitrary number of parametric curves
 309 typedef struct {
 310     cmsPluginBase base;
 311
 312     cmsUInt32Number nFunctions;                                     // Number of supported functions
 313     cmsUInt32Number FunctionTypes[MAX_TYPES_IN_LCMS_PLUGIN];        // The identification types
 314     cmsUInt32Number ParameterCount[MAX_TYPES_IN_LCMS_PLUGIN];       // Number of parameters for each function
 315
 316     cmsParametricCurveEvaluator    Evaluator;                       // The evaluator
 317
 318 } cmsPluginParametricCurves;
 319 //----------------------------------------------------------------------------------------------------------
 320
 321 // Formatters. This plug-in adds new handlers, replacing them if they already exist. Formatters dealing with
 322 // cmsFloat32Number (bps = 4) or double (bps = 0) types are requested via FormatterFloat callback. Others come across
 323 // Formatter16 callback
 324
 325 struct _cmstransform_struct;
 326
 327 typedef cmsUInt8Number* (* cmsFormatter16)(register struct _cmstransform_struct* CMMcargo,
 328                                            register cmsUInt16Number Values[],
 329                                            register cmsUInt8Number*  Buffer,
 330                                            register cmsUInt32Number  Stride);
 331
 332 typedef cmsUInt8Number* (* cmsFormatterFloat)(struct _cmstransform_struct* CMMcargo,
 333                                               cmsFloat32Number Values[],
 334                                               cmsUInt8Number*  Buffer,
 335                                               cmsUInt32Number  Stride);
 336
 337 // This type holds a pointer to a formatter that can be either 16 bits or cmsFloat32Number
 338 typedef union {
 339     cmsFormatter16    Fmt16;
 340     cmsFormatterFloat FmtFloat;
 341
 342 } cmsFormatter;
 343
 344 #define CMS_PACK_FLAGS_16BITS       0x0000
 345 #define CMS_PACK_FLAGS_FLOAT        0x0001
 346
 347 typedef enum { cmsFormatterInput=0, cmsFormatterOutput=1 } cmsFormatterDirection;
 348
 349 typedef cmsFormatter (* cmsFormatterFactory)(cmsUInt32Number Type,           // Specific type, i.e. TYPE_RGB_8
 350                                              cmsFormatterDirection Dir,
 351                                              cmsUInt32Number dwFlags);      // precision
 352
 353 // Plug-in may implement an arbitrary number of formatters
 354 typedef struct {
 355     cmsPluginBase          base;
 356     cmsFormatterFactory    FormattersFactory;
 357
 358 } cmsPluginFormatters;
 359
 360 //----------------------------------------------------------------------------------------------------------
 361
 362 // Tag type handler. Each type is free to return anything it wants, and it is up to the caller to
 363 // know in advance what is the type contained in the tag.
 364 typedef struct _cms_typehandler_struct {
 365
 366         cmsTagTypeSignature Signature;     // The signature of the type
 367
 368         // Allocates and reads items
 369         void *   (* ReadPtr)(struct _cms_typehandler_struct* self,
 370                              cmsIOHANDLER*      io,
 371                              cmsUInt32Number*   nItems,
 372                              cmsUInt32Number    SizeOfTag);
 373
 374         // Writes n Items
 375         cmsBool  (* WritePtr)(struct _cms_typehandler_struct* self,
 376                               cmsIOHANDLER*     io,
 377                               void*             Ptr,
 378                               cmsUInt32Number   nItems);
 379
 380         // Duplicate an item or array of items
 381         void*   (* DupPtr)(struct _cms_typehandler_struct* self,
 382                            const void *Ptr,
 383                            cmsUInt32Number n);
 384
 385         // Free all resources
 386         void    (* FreePtr)(struct _cms_typehandler_struct* self,
 387                             void *Ptr);
 388
 389         // Additional parameters used by the calling thread
 390         cmsContext       ContextID;
 391         cmsUInt32Number  ICCVersion;
 392
 393 } cmsTagTypeHandler;
 394
 395 // Each plug-in implements a single type
 396 typedef struct {
 397         cmsPluginBase      base;
 398         cmsTagTypeHandler  Handler;
 399
 400 } cmsPluginTagType;
 401
 402 //----------------------------------------------------------------------------------------------------------
 403
 404 // This is the tag plugin, which identifies tags. For writing, a pointer to function is provided.
 405 // This function should return the desired type for this tag, given the version of profile
 406 // and the data being serialized.
 407 typedef struct {
 408
 409     cmsUInt32Number     ElemCount;          // If this tag needs an array, how many elements should keep
 410
 411     // For reading.
 412     cmsUInt32Number     nSupportedTypes;    // In how many types this tag can come (MAX_TYPES_IN_LCMS_PLUGIN maximum)
 413     cmsTagTypeSignature SupportedTypes[MAX_TYPES_IN_LCMS_PLUGIN];
 414
 415     // For writting
 416     cmsTagTypeSignature (* DecideType)(cmsFloat64Number ICCVersion, const void *Data);
 417
 418 } cmsTagDescriptor;
 419
 420 // Plug-in implements a single tag
 421 typedef struct {
 422     cmsPluginBase    base;
 423
 424     cmsTagSignature  Signature;
 425     cmsTagDescriptor Descriptor;
 426
 427 } cmsPluginTag;
 428
 429 //----------------------------------------------------------------------------------------------------------
 430
 431 // Custom intents. This function should join all profiles specified in the array in
 432 // a single LUT. Any custom intent in the chain redirects to custom function. If more than
 433 // one custom intent is found, the one located first is invoked. Usually users should use only one
 434 // custom intent, so mixing custom intents in same multiprofile transform is not supported.
 435
 436 typedef cmsPipeline* (* cmsIntentFn)( cmsContext       ContextID,
 437                                       cmsUInt32Number  nProfiles,
 438                                       cmsUInt32Number  Intents[],
 439                                       cmsHPROFILE      hProfiles[],
 440                                       cmsBool          BPC[],
 441                                       cmsFloat64Number AdaptationStates[],
 442                                       cmsUInt32Number  dwFlags);
 443
 444
 445 // Each plug-in defines a single intent number.
 446 typedef struct {
 447     cmsPluginBase     base;
 448     cmsUInt32Number   Intent;
 449     cmsIntentFn       Link;
 450     char              Description[256];
 451
 452 } cmsPluginRenderingIntent;
 453
 454
 455 // The default ICC intents (perceptual, saturation, rel.col and abs.col)
 456 CMSAPI cmsPipeline*  CMSEXPORT _cmsDefaultICCintents(cmsContext       ContextID,
 457                                                      cmsUInt32Number  nProfiles,
 458                                                      cmsUInt32Number  Intents[],
 459                                                      cmsHPROFILE      hProfiles[],
 460                                                      cmsBool          BPC[],
 461                                                      cmsFloat64Number AdaptationStates[],
 462                                                      cmsUInt32Number  dwFlags);
 463
 464
 465 //----------------------------------------------------------------------------------------------------------
 466
 467 // Pipelines, Multi Process Elements.
 468
 469 typedef void (* _cmsStageEvalFn)     (const cmsFloat32Number In[], cmsFloat32Number Out[], const cmsStage* mpe);
 470 typedef void*(* _cmsStageDupElemFn)  (cmsStage* mpe);
 471 typedef void (* _cmsStageFreeElemFn) (cmsStage* mpe);
 472
 473
 474 // This function allocates a generic MPE
 475 CMSAPI cmsStage* CMSEXPORT _cmsStageAllocPlaceholder(cmsContext ContextID,
 476                                 cmsStageSignature     Type,
 477                                 cmsUInt32Number       InputChannels,
 478                                 cmsUInt32Number       OutputChannels,
 479                                 _cmsStageEvalFn       EvalPtr,            // Points to fn that evaluates the element (always in floating point)
 480                                 _cmsStageDupElemFn    DupElemPtr,         // Points to a fn that duplicates the stage
 481                                 _cmsStageFreeElemFn   FreePtr,            // Points to a fn that sets the element free
 482                                 void*                 Data);              // A generic pointer to whatever memory needed by the element
 483 typedef struct {
 484       cmsPluginBase     base;
 485       cmsTagTypeHandler Handler;
 486
 487 }  cmsPluginMultiProcessElement;
 488
 489 //----------------------------------------------------------------------------------------------------------
 490 // Optimization. Using this plug-in, additional optimization strategies may be implemented.
 491 // The function should return TRUE if any optimization is done on the LUT, this terminates
 492 // the optimization  search. Or FALSE if it is unable to optimize and want to give a chance
 493 // to the rest of optimizers.
 494
 495 typedef void     (* _cmsOPTeval16Fn)(register const cmsUInt16Number In[],
 496                                      register cmsUInt16Number Out[],
 497                                      register const void* Data);
 498
 499 typedef void     (* _cmsOPTfreeDataFn)(cmsContext ContextID, void* Data);
 500 typedef void*    (* _cmsOPTdupDataFn)(cmsContext ContextID, const void* Data);
 501
 502
 503 typedef cmsBool  (* _cmsOPToptimizeFn)(cmsPipeline** Lut,
 504                                        cmsUInt32Number  Intent,
 505                                        cmsUInt32Number* InputFormat,
 506                                        cmsUInt32Number* OutputFormat,
 507                                        cmsUInt32Number* dwFlags);
 508
 509 // This function may be used to set the optional evaluator and a block of private data. If private data is being used, an optional
 510 // duplicator and free functions should also be specified in order to duplicate the LUT construct. Use NULL to inhibit such functionality.
 511
 512 CMSAPI void CMSEXPORT _cmsPipelineSetOptimizationParameters(cmsPipeline* Lut,
 513                                                _cmsOPTeval16Fn Eval16,
 514                                                void* PrivateData,
 515                                                _cmsOPTfreeDataFn FreePrivateDataFn,
 516                                                _cmsOPTdupDataFn DupPrivateDataFn);
 517
 518 typedef struct {
 519       cmsPluginBase     base;
 520
 521       // Optimize entry point
 522       _cmsOPToptimizeFn  OptimizePtr;
 523
 524 }  cmsPluginOptimization;
 525
 526 //----------------------------------------------------------------------------------------------------------
 527
 528 #ifndef CMS_USE_CPP_API
 529 #   ifdef __cplusplus
 530     }
 531 #   endif
 532 #endif
 533
 534 #define _lcms_plugin_H
 535 #endif