//
// 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.
//
//---------------------------------------------------------------------------------
//
#ifndef _lcms_internal_H
// Include plug-in foundation
#ifndef _lcms_plugin_H
# include "third_party/lcms/include/lcms2_plugin.h"
#endif
// ctype is part of C99 as per 7.1.2
#include <ctype.h>
// assert macro is part of C99 as per 7.2
#include <assert.h>
// Some needed constants
#ifndef M_PI
# define M_PI 3.14159265358979323846
#endif
#ifndef M_LOG10E
# define M_LOG10E 0.434294481903251827651
#endif
// BorlandC 5.5, VC2003 are broken on that
#if defined(__BORLANDC__) || (_MSC_VER < 1400) // 1400 == VC++ 8.0
#define sinf(x) (float)sin((float)x)
#define sqrtf(x) (float)sqrt((float)x)
#endif
// Alignment of ICC file format uses 4 bytes (cmsUInt32Number)
#define _cmsALIGNLONG(x) (((x)+(sizeof(cmsUInt32Number)-1)) & ~(sizeof(cmsUInt32Number)-1))
// Alignment to memory pointer
// (Ultra)SPARC with gcc requires ptr alignment of 8 bytes
// even though sizeof(void *) is only four: for greatest flexibility
// allow the build to specify ptr alignment.
#ifndef CMS_PTR_ALIGNMENT
# define CMS_PTR_ALIGNMENT sizeof(void *)
#endif
#define _cmsALIGNMEM(x) (((x)+(CMS_PTR_ALIGNMENT - 1)) & ~(CMS_PTR_ALIGNMENT - 1))
// Maximum encodeable values in floating point
#define MAX_ENCODEABLE_XYZ (1.0 + 32767.0/32768.0)
#define MIN_ENCODEABLE_ab2 (-128.0)
#define MAX_ENCODEABLE_ab2 ((65535.0/256.0) - 128.0)
#define MIN_ENCODEABLE_ab4 (-128.0)
#define MAX_ENCODEABLE_ab4 (127.0)
// Maximum of channels for internal pipeline evaluation
#define MAX_STAGE_CHANNELS 128
// Unused parameter warning supression
#define cmsUNUSED_PARAMETER(x) ((void)x)
// The specification for "inline" is section 6.7.4 of the C99 standard (ISO/IEC 9899:1999).
// unfortunately VisualC++ does not conform that
#if defined(_MSC_VER) || defined(__BORLANDC__)
# define cmsINLINE __inline
#else
# define cmsINLINE static inline
#endif
// Other replacement functions
#ifdef _MSC_VER
# ifndef snprintf
# define snprintf _snprintf
# endif
# ifndef vsnprintf
# define vsnprintf _vsnprintf
# endif
#endif
// A fast way to convert from/to 16 <-> 8 bits
#define FROM_8_TO_16(rgb) (cmsUInt16Number) ((((cmsUInt16Number) (rgb)) << 8)|(rgb))
#define FROM_16_TO_8(rgb) (cmsUInt8Number) ((((cmsUInt32Number)(rgb) * 65281U + 8388608U) >> 24) & 0xFFU)
// Code analysis is broken on asserts
#ifdef _MSC_VER
# if (_MSC_VER >= 1500)
# define _cmsAssert(a) { assert((a)); __analysis_assume((a)); }
# else
# define _cmsAssert(a) assert((a))
# endif
#else
# define _cmsAssert(a) assert((a))
#endif
//---------------------------------------------------------------------------------
// Determinant lower than that are assumed zero (used on matrix invert)
#define MATRIX_DET_TOLERANCE 0.0001
//---------------------------------------------------------------------------------
// Fixed point
#define FIXED_TO_INT(x) ((x)>>16)
#define FIXED_REST_TO_INT(x) ((x)&0xFFFFU)
#define ROUND_FIXED_TO_INT(x) (((x)+0x8000)>>16)
cmsINLINE cmsS15Fixed16Number _cmsToFixedDomain(int a) { return a + ((a + 0x7fff) / 0xffff); }
cmsINLINE int _cmsFromFixedDomain(cmsS15Fixed16Number a) { return a - ((a + 0x7fff) >> 16); }
// -----------------------------------------------------------------------------------------------------------
// Fast floor conversion logic. Thanks to Sree Kotay and Stuart Nixon
// note than this only works in the range ..-32767...+32767 because
// mantissa is interpreted as 15.16 fixed point.
// The union is to avoid pointer aliasing overoptimization.
cmsINLINE int _cmsQuickFloor(cmsFloat64Number val)
{
#ifdef CMS_DONT_USE_FAST_FLOOR
return (int) floor(val);
#else
const cmsFloat64Number _lcms_double2fixmagic = 68719476736.0 * 1.5; // 2^36 * 1.5, (52-16=36) uses limited precision to floor
union {
cmsFloat64Number val;
int halves[2];
} temp;
temp.val = val + _lcms_double2fixmagic;
#ifdef CMS_USE_BIG_ENDIAN
return temp.halves[1] >> 16;
#else
return temp.halves[0] >> 16;
#endif
#endif
}
// Fast floor restricted to 0..65535.0
cmsINLINE cmsUInt16Number _cmsQuickFloorWord(cmsFloat64Number d)
{
return (cmsUInt16Number) _cmsQuickFloor(d - 32767.0) + 32767U;
}
// Floor to word, taking care of saturation
cmsINLINE cmsUInt16Number _cmsQuickSaturateWord(cmsFloat64Number d)
{
d += 0.5;
if (d <= 0) return 0;
if (d >= 65535.0) return 0xffff;
return _cmsQuickFloorWord(d);
}
// Pthread support --------------------------------------------------------------------
#ifndef CMS_NO_PTHREADS
// This is the threading support. Unfortunately, it has to be platform-dependent because
// windows does not support pthreads.
#ifdef CMS_IS_WINDOWS_
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
// From: http://locklessinc.com/articles/pthreads_on_windows/
// The pthreads API has an initialization macro that has no correspondence to anything in
// the windows API. By investigating the internal definition of the critical section type,
// one may work out how to initialize one without calling InitializeCriticalSection().
// The trick here is that InitializeCriticalSection() is not allowed to fail. It tries
// to allocate a critical section debug object, but if no memory is available, it sets
// the pointer to a specific value. (One would expect that value to be NULL, but it is
// actually (void *)-1 for some reason.) Thus we can use this special value for that
// pointer, and the critical section code will work.
// The other important part of the critical section type to initialize is the number
// of waiters. This controls whether or not the mutex is locked. Fortunately, this
// part of the critical section is unlikely to change. Apparently, many programs
// already test critical sections to see if they are locked using this value, so
// Microsoft felt that it was necessary to keep it set at -1 for an unlocked critical
// section, even when they changed the underlying algorithm to be more scalable.
// The final parts of the critical section object are unimportant, and can be set
// to zero for their defaults. This yields to an initialization macro:
typedef CRITICAL_SECTION _cmsMutex;
#define CMS_MUTEX_INITIALIZER {(PRTL_CRITICAL_SECTION_DEBUG) -1,-1,0,0,0,0}
#ifdef _MSC_VER
# if (_MSC_VER >= 1800)
# pragma warning(disable : 26135)
# endif
#endif
cmsINLINE int _cmsLockPrimitive(_cmsMutex *m)
{
EnterCriticalSection(m);
return 0;
}
cmsINLINE int _cmsUnlockPrimitive(_cmsMutex *m)
{
LeaveCriticalSection(m);
return 0;
}
cmsINLINE int _cmsInitMutexPrimitive(_cmsMutex *m)
{
InitializeCriticalSection(m);
return 0;
}
cmsINLINE int _cmsDestroyMutexPrimitive(_cmsMutex *m)
{
DeleteCriticalSection(m);
return 0;
}
cmsINLINE int _cmsEnterCriticalSectionPrimitive(_cmsMutex *m)
{
EnterCriticalSection(m);
return 0;
}
cmsINLINE int _cmsLeaveCriticalSectionPrimitive(_cmsMutex *m)
{
LeaveCriticalSection(m);
return 0;
}
#else
// Rest of the wide world
#include <pthread.h>
#define CMS_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
typedef pthread_mutex_t _cmsMutex;
cmsINLINE int _cmsLockPrimitive(_cmsMutex *m)
{
return pthread_mutex_lock(m);
}
cmsINLINE int _cmsUnlockPrimitive(_cmsMutex *m)
{
return pthread_mutex_unlock(m);
}
cmsINLINE int _cmsInitMutexPrimitive(_cmsMutex *m)
{
return pthread_mutex_init(m, NULL);
}
cmsINLINE int _cmsDestroyMutexPrimitive(_cmsMutex *m)
{
return pthread_mutex_destroy(m);
}
cmsINLINE int _cmsEnterCriticalSectionPrimitive(_cmsMutex *m)
{
return pthread_mutex_lock(m);
}
cmsINLINE int _cmsLeaveCriticalSectionPrimitive(_cmsMutex *m)
{
return pthread_mutex_unlock(m);
}
#endif
#else
#define CMS_MUTEX_INITIALIZER 0
typedef int _cmsMutex;
cmsINLINE int _cmsLockPrimitive(_cmsMutex *m)
{
cmsUNUSED_PARAMETER(m);
return 0;
}
cmsINLINE int _cmsUnlockPrimitive(_cmsMutex *m)
{
cmsUNUSED_PARAMETER(m);
return 0;
}
cmsINLINE int _cmsInitMutexPrimitive(_cmsMutex *m)
{
cmsUNUSED_PARAMETER(m);
return 0;
}
cmsINLINE int _cmsDestroyMutexPrimitive(_cmsMutex *m)
{
cmsUNUSED_PARAMETER(m);
return 0;
}
cmsINLINE int _cmsEnterCriticalSectionPrimitive(_cmsMutex *m)
{
cmsUNUSED_PARAMETER(m);
return 0;
}
cmsINLINE int _cmsLeaveCriticalSectionPrimitive(_cmsMutex *m)
{
cmsUNUSED_PARAMETER(m);
return 0;
}
#endif
// Plug-In registration ---------------------------------------------------------------
// Specialized function for plug-in memory management. No pairing free() since whole pool is freed at once.
void* _cmsPluginMalloc(cmsContext ContextID, cmsUInt32Number size);
// Memory management
cmsBool _cmsRegisterMemHandlerPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// Interpolation
cmsBool _cmsRegisterInterpPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// Parametric curves
cmsBool _cmsRegisterParametricCurvesPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// Formatters management
cmsBool _cmsRegisterFormattersPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// Tag type management
cmsBool _cmsRegisterTagTypePlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// Tag management
cmsBool _cmsRegisterTagPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// Intent management
cmsBool _cmsRegisterRenderingIntentPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// Multi Process elements
cmsBool _cmsRegisterMultiProcessElementPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// Optimization
cmsBool _cmsRegisterOptimizationPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// Transform
cmsBool _cmsRegisterTransformPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// Mutex
cmsBool _cmsRegisterMutexPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
// ---------------------------------------------------------------------------------------------------------
// Suballocators.
typedef struct _cmsSubAllocator_chunk_st {
cmsUInt8Number* Block;
cmsUInt32Number BlockSize;
cmsUInt32Number Used;
struct _cmsSubAllocator_chunk_st* next;
} _cmsSubAllocator_chunk;
typedef struct {
cmsContext ContextID;
_cmsSubAllocator_chunk* h;
} _cmsSubAllocator;
_cmsSubAllocator* _cmsCreateSubAlloc(cmsContext ContextID, cmsUInt32Number Initial);
void _cmsSubAllocDestroy(_cmsSubAllocator* s);
void* _cmsSubAlloc(_cmsSubAllocator* s, cmsUInt32Number size);
void* _cmsSubAllocDup(_cmsSubAllocator* s, const void *ptr, cmsUInt32Number size);
// ----------------------------------------------------------------------------------
// The context clients.
typedef enum {
UserPtr, // User-defined pointer
Logger,
AlarmCodesContext,
AdaptationStateContext,
MemPlugin,
InterpPlugin,
CurvesPlugin,
FormattersPlugin,
TagTypePlugin,
TagPlugin,
IntentPlugin,
MPEPlugin,
OptimizationPlugin,
TransformPlugin,
MutexPlugin,
// Last in list
MemoryClientMax
} _cmsMemoryClient;
// Container for memory management plug-in.
typedef struct {
_cmsMallocFnPtrType MallocPtr;
_cmsMalloZerocFnPtrType MallocZeroPtr;
_cmsFreeFnPtrType FreePtr;
_cmsReallocFnPtrType ReallocPtr;
_cmsCallocFnPtrType CallocPtr;
_cmsDupFnPtrType DupPtr;
} _cmsMemPluginChunkType;
// Copy memory management function pointers from plug-in to chunk, taking care of missing routines
void _cmsInstallAllocFunctions(cmsPluginMemHandler* Plugin, _cmsMemPluginChunkType* ptr);
// Internal structure for context
struct _cmsContext_struct {
struct _cmsContext_struct* Next; // Points to next context in the new style
_cmsSubAllocator* MemPool; // The memory pool that stores context data
void* chunks[MemoryClientMax]; // array of pointers to client chunks. Memory itself is hold in the suballocator.
// If NULL, then it reverts to global Context0
_cmsMemPluginChunkType DefaultMemoryManager; // The allocators used for creating the context itself. Cannot be overriden
};
// Returns a pointer to a valid context structure, including the global one if id is zero.
// Verifies the magic number.
struct _cmsContext_struct* _cmsGetContext(cmsContext ContextID);
// Returns the block assigned to the specific zone.
void* _cmsContextGetClientChunk(cmsContext id, _cmsMemoryClient mc);
// Chunks of context memory by plug-in client -------------------------------------------------------
// Those structures encapsulates all variables needed by the several context clients (mostly plug-ins)
// Container for error logger -- not a plug-in
typedef struct {
cmsLogErrorHandlerFunction LogErrorHandler; // Set to NULL for Context0 fallback
} _cmsLogErrorChunkType;
// The global Context0 storage for error logger
extern _cmsLogErrorChunkType _cmsLogErrorChunk;
// Allocate and init error logger container.
void _cmsAllocLogErrorChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Container for alarm codes -- not a plug-in
typedef struct {
cmsUInt16Number AlarmCodes[cmsMAXCHANNELS];
} _cmsAlarmCodesChunkType;
// The global Context0 storage for alarm codes
extern _cmsAlarmCodesChunkType _cmsAlarmCodesChunk;
// Allocate and init alarm codes container.
void _cmsAllocAlarmCodesChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Container for adaptation state -- not a plug-in
typedef struct {
cmsFloat64Number AdaptationState;
} _cmsAdaptationStateChunkType;
// The global Context0 storage for adaptation state
extern _cmsAdaptationStateChunkType _cmsAdaptationStateChunk;
// Allocate and init adaptation state container.
void _cmsAllocAdaptationStateChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// The global Context0 storage for memory management
extern _cmsMemPluginChunkType _cmsMemPluginChunk;
// Allocate and init memory management container.
void _cmsAllocMemPluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Container for interpolation plug-in
typedef struct {
cmsInterpFnFactory Interpolators;
} _cmsInterpPluginChunkType;
// The global Context0 storage for interpolation plug-in
extern _cmsInterpPluginChunkType _cmsInterpPluginChunk;
// Allocate and init interpolation container.
void _cmsAllocInterpPluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Container for parametric curves plug-in
typedef struct {
struct _cmsParametricCurvesCollection_st* ParametricCurves;
} _cmsCurvesPluginChunkType;
// The global Context0 storage for tone curves plug-in
extern _cmsCurvesPluginChunkType _cmsCurvesPluginChunk;
// Allocate and init parametric curves container.
void _cmsAllocCurvesPluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Container for formatters plug-in
typedef struct {
struct _cms_formatters_factory_list* FactoryList;
} _cmsFormattersPluginChunkType;
// The global Context0 storage for formatters plug-in
extern _cmsFormattersPluginChunkType _cmsFormattersPluginChunk;
// Allocate and init formatters container.
void _cmsAllocFormattersPluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// This chunk type is shared by TagType plug-in and MPE Plug-in
typedef struct {
struct _cmsTagTypeLinkedList_st* TagTypes;
} _cmsTagTypePluginChunkType;
// The global Context0 storage for tag types plug-in
extern _cmsTagTypePluginChunkType _cmsTagTypePluginChunk;
// The global Context0 storage for mult process elements plug-in
extern _cmsTagTypePluginChunkType _cmsMPETypePluginChunk;
// Allocate and init Tag types container.
void _cmsAllocTagTypePluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Allocate and init MPE container.
void _cmsAllocMPETypePluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Container for tag plug-in
typedef struct {
struct _cmsTagLinkedList_st* Tag;
} _cmsTagPluginChunkType;
// The global Context0 storage for tag plug-in
extern _cmsTagPluginChunkType _cmsTagPluginChunk;
// Allocate and init Tag container.
void _cmsAllocTagPluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Container for intents plug-in
typedef struct {
struct _cms_intents_list* Intents;
} _cmsIntentsPluginChunkType;
// The global Context0 storage for intents plug-in
extern _cmsIntentsPluginChunkType _cmsIntentsPluginChunk;
// Allocate and init intents container.
void _cmsAllocIntentsPluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Container for optimization plug-in
typedef struct {
struct _cmsOptimizationCollection_st* OptimizationCollection;
} _cmsOptimizationPluginChunkType;
// The global Context0 storage for optimizers plug-in
extern _cmsOptimizationPluginChunkType _cmsOptimizationPluginChunk;
// Allocate and init optimizers container.
void _cmsAllocOptimizationPluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Container for transform plug-in
typedef struct {
struct _cmsTransformCollection_st* TransformCollection;
} _cmsTransformPluginChunkType;
// The global Context0 storage for full-transform replacement plug-in
extern _cmsTransformPluginChunkType _cmsTransformPluginChunk;
// Allocate and init transform container.
void _cmsAllocTransformPluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// Container for mutex plug-in
typedef struct {
_cmsCreateMutexFnPtrType CreateMutexPtr;
_cmsDestroyMutexFnPtrType DestroyMutexPtr;
_cmsLockMutexFnPtrType LockMutexPtr;
_cmsUnlockMutexFnPtrType UnlockMutexPtr;
} _cmsMutexPluginChunkType;
// The global Context0 storage for mutex plug-in
extern _cmsMutexPluginChunkType _cmsMutexPluginChunk;
// Allocate and init mutex container.
void _cmsAllocMutexPluginChunk(struct _cmsContext_struct* ctx,
const struct _cmsContext_struct* src);
// ----------------------------------------------------------------------------------
// MLU internal representation
typedef struct {
cmsUInt16Number Language;
cmsUInt16Number Country;
cmsUInt32Number StrW; // Offset to current unicode string
cmsUInt32Number Len; // Length in bytes
} _cmsMLUentry;
struct _cms_MLU_struct {
cmsContext ContextID;
// The directory
cmsUInt32Number AllocatedEntries;
cmsUInt32Number UsedEntries;
_cmsMLUentry* Entries; // Array of pointers to strings allocated in MemPool
// The Pool
cmsUInt32Number PoolSize; // The maximum allocated size
cmsUInt32Number PoolUsed; // The used size
void* MemPool; // Pointer to begin of memory pool
};
// Named color list internal representation
typedef struct {
char Name[cmsMAX_PATH];
cmsUInt16Number PCS[3];
cmsUInt16Number DeviceColorant[cmsMAXCHANNELS];
} _cmsNAMEDCOLOR;
struct _cms_NAMEDCOLORLIST_struct {
cmsUInt32Number nColors;
cmsUInt32Number Allocated;
cmsUInt32Number ColorantCount;
char Prefix[33]; // Prefix and suffix are defined to be 32 characters at most
char Suffix[33];
_cmsNAMEDCOLOR* List;
cmsContext ContextID;
};
// ----------------------------------------------------------------------------------
// This is the internal struct holding profile details.
// Maximum supported tags in a profile
#define MAX_TABLE_TAG 100
typedef struct _cms_iccprofile_struct {
// I/O handler
cmsIOHANDLER* IOhandler;
// The thread ID
cmsContext ContextID;
// Creation time
struct tm Created;
// Only most important items found in ICC profiles
cmsUInt32Number Version;
cmsProfileClassSignature DeviceClass;
cmsColorSpaceSignature ColorSpace;
cmsColorSpaceSignature PCS;
cmsUInt32Number RenderingIntent;
cmsUInt32Number flags;
cmsUInt32Number manufacturer, model;
cmsUInt64Number attributes;
cmsUInt32Number creator;
cmsProfileID ProfileID;
// Dictionary
cmsUInt32Number TagCount;
cmsTagSignature TagNames[MAX_TABLE_TAG];
cmsTagSignature TagLinked[MAX_TABLE_TAG]; // The tag to which is linked (0=none)
cmsUInt32Number TagSizes[MAX_TABLE_TAG]; // Size on disk
cmsUInt32Number TagOffsets[MAX_TABLE_TAG];
cmsBool TagSaveAsRaw[MAX_TABLE_TAG]; // True to write uncooked
void * TagPtrs[MAX_TABLE_TAG];
cmsTagTypeHandler* TagTypeHandlers[MAX_TABLE_TAG]; // Same structure may be serialized on different types
// depending on profile version, so we keep track of the
// type handler for each tag in the list.
// Special
cmsBool IsWrite;
// Keep a mutex for cmsReadTag -- Note that this only works if the user includes a mutex plugin
void * UsrMutex;
} _cmsICCPROFILE;
// IO helpers for profiles
cmsBool _cmsReadHeader(_cmsICCPROFILE* Icc);
cmsBool _cmsWriteHeader(_cmsICCPROFILE* Icc, cmsUInt32Number UsedSpace);
int _cmsSearchTag(_cmsICCPROFILE* Icc, cmsTagSignature sig, cmsBool lFollowLinks);
// Tag types
cmsTagTypeHandler* _cmsGetTagTypeHandler(cmsContext ContextID, cmsTagTypeSignature sig);
cmsTagTypeSignature _cmsGetTagTrueType(cmsHPROFILE hProfile, cmsTagSignature sig);
cmsTagDescriptor* _cmsGetTagDescriptor(cmsContext ContextID, cmsTagSignature sig);
// Error logging ---------------------------------------------------------------------------------------------------------
void _cmsTagSignature2String(char String[5], cmsTagSignature sig);
// Interpolation ---------------------------------------------------------------------------------------------------------
cmsInterpParams* _cmsComputeInterpParams(cmsContext ContextID, int nSamples, int InputChan, int OutputChan, const void* Table, cmsUInt32Number dwFlags);
cmsInterpParams* _cmsComputeInterpParamsEx(cmsContext ContextID, const cmsUInt32Number nSamples[], int InputChan, int OutputChan, const void* Table, cmsUInt32Number dwFlags);
void _cmsFreeInterpParams(cmsInterpParams* p);
cmsBool _cmsSetInterpolationRoutine(cmsContext ContextID, cmsInterpParams* p);
// Curves ----------------------------------------------------------------------------------------------------------------
// This struct holds information about a segment, plus a pointer to the function that implements the evaluation.
// In the case of table-based, Eval pointer is set to NULL
// The gamma function main structure
struct _cms_curve_struct {
cmsInterpParams* InterpParams; // Private optimizations for interpolation
cmsUInt32Number nSegments; // Number of segments in the curve. Zero for a 16-bit based tables
cmsCurveSegment* Segments; // The segments
cmsInterpParams** SegInterp; // Array of private optimizations for interpolation in table-based segments
cmsParametricCurveEvaluator* Evals; // Evaluators (one per segment)
// 16 bit Table-based representation follows
cmsUInt32Number nEntries; // Number of table elements
cmsUInt16Number* Table16; // The table itself.
};
// Pipelines & Stages ---------------------------------------------------------------------------------------------
// A single stage
struct _cmsStage_struct {
cmsContext ContextID;
cmsStageSignature Type; // Identifies the stage
cmsStageSignature Implements; // Identifies the *function* of the stage (for optimizations)
cmsUInt32Number InputChannels; // Input channels -- for optimization purposes
cmsUInt32Number OutputChannels; // Output channels -- for optimization purposes
_cmsStageEvalFn EvalPtr; // Points to fn that evaluates the stage (always in floating point)
_cmsStageDupElemFn DupElemPtr; // Points to a fn that duplicates the *data* of the stage
_cmsStageFreeElemFn FreePtr; // Points to a fn that sets the *data* of the stage free
// A generic pointer to whatever memory needed by the stage
void* Data;
// Maintains linked list (used internally)
struct _cmsStage_struct* Next;
};
// Special Stages (cannot be saved)
cmsStage* _cmsStageAllocLab2XYZ(cmsContext ContextID);
cmsStage* _cmsStageAllocXYZ2Lab(cmsContext ContextID);
cmsStage* _cmsStageAllocLabPrelin(cmsContext ContextID);
cmsStage* _cmsStageAllocLabV2ToV4(cmsContext ContextID);
cmsStage* _cmsStageAllocLabV2ToV4curves(cmsContext ContextID);
cmsStage* _cmsStageAllocLabV4ToV2(cmsContext ContextID);
cmsStage* _cmsStageAllocNamedColor(cmsNAMEDCOLORLIST* NamedColorList, cmsBool UsePCS);
cmsStage* _cmsStageAllocIdentityCurves(cmsContext ContextID, int nChannels);
cmsStage* _cmsStageAllocIdentityCLut(cmsContext ContextID, int nChan);
cmsStage* _cmsStageNormalizeFromLabFloat(cmsContext ContextID);
cmsStage* _cmsStageNormalizeFromXyzFloat(cmsContext ContextID);
cmsStage* _cmsStageNormalizeToLabFloat(cmsContext ContextID);
cmsStage* _cmsStageNormalizeToXyzFloat(cmsContext ContextID);
cmsStage* _cmsStageClipNegatives(cmsContext ContextID, int nChannels);
// For curve set only
cmsToneCurve** _cmsStageGetPtrToCurveSet(const cmsStage* mpe);
// Pipeline Evaluator (in floating point)
typedef void (* _cmsPipelineEvalFloatFn)(const cmsFloat32Number In[],
cmsFloat32Number Out[],
const void* Data);
struct _cmsPipeline_struct {
cmsStage* Elements; // Points to elements chain
cmsUInt32Number InputChannels, OutputChannels;
// Data & evaluators
void *Data;
_cmsOPTeval16Fn Eval16Fn;
_cmsPipelineEvalFloatFn EvalFloatFn;
_cmsFreeUserDataFn FreeDataFn;
_cmsDupUserDataFn DupDataFn;
cmsContext ContextID; // Environment
cmsBool SaveAs8Bits; // Implementation-specific: save as 8 bits if possible
};
// LUT reading & creation -------------------------------------------------------------------------------------------
// Read tags using low-level function, provide necessary glue code to adapt versions, etc. All those return a brand new copy
// of the LUTS, since ownership of original is up to the profile. The user should free allocated resources.
cmsPipeline* _cmsReadInputLUT(cmsHPROFILE hProfile, int Intent);
cmsPipeline* _cmsReadOutputLUT(cmsHPROFILE hProfile, int Intent);
cmsPipeline* _cmsReadDevicelinkLUT(cmsHPROFILE hProfile, int Intent);
// Special values
cmsBool _cmsReadMediaWhitePoint(cmsCIEXYZ* Dest, cmsHPROFILE hProfile);
cmsBool _cmsReadCHAD(cmsMAT3* Dest, cmsHPROFILE hProfile);
// Profile linker --------------------------------------------------------------------------------------------------
cmsPipeline* _cmsLinkProfiles(cmsContext ContextID,
cmsUInt32Number nProfiles,
cmsUInt32Number TheIntents[],
cmsHPROFILE hProfiles[],
cmsBool BPC[],
cmsFloat64Number AdaptationStates[],
cmsUInt32Number dwFlags);
// Sequence --------------------------------------------------------------------------------------------------------
cmsSEQ* _cmsReadProfileSequence(cmsHPROFILE hProfile);
cmsBool _cmsWriteProfileSequence(cmsHPROFILE hProfile, const cmsSEQ* seq);
cmsSEQ* _cmsCompileProfileSequence(cmsContext ContextID, cmsUInt32Number nProfiles, cmsHPROFILE hProfiles[]);
// LUT optimization ------------------------------------------------------------------------------------------------
cmsUInt16Number _cmsQuantizeVal(cmsFloat64Number i, int MaxSamples);
int _cmsReasonableGridpointsByColorspace(cmsColorSpaceSignature Colorspace, cmsUInt32Number dwFlags);
cmsBool _cmsEndPointsBySpace(cmsColorSpaceSignature Space,
cmsUInt16Number **White,
cmsUInt16Number **Black,
cmsUInt32Number *nOutputs);
cmsBool _cmsOptimizePipeline(cmsContext ContextID,
cmsPipeline** Lut,
int Intent,
cmsUInt32Number* InputFormat,
cmsUInt32Number* OutputFormat,
cmsUInt32Number* dwFlags );
// Hi level LUT building ----------------------------------------------------------------------------------------------
cmsPipeline* _cmsCreateGamutCheckPipeline(cmsContext ContextID,
cmsHPROFILE hProfiles[],
cmsBool BPC[],
cmsUInt32Number Intents[],
cmsFloat64Number AdaptationStates[],
cmsUInt32Number nGamutPCSposition,
cmsHPROFILE hGamut);
// Formatters ------------------------------------------------------------------------------------------------------------
#define cmsFLAGS_CAN_CHANGE_FORMATTER 0x02000000 // Allow change buffer format
cmsBool _cmsFormatterIsFloat(cmsUInt32Number Type);
cmsBool _cmsFormatterIs8bit(cmsUInt32Number Type);
cmsFormatter _cmsGetFormatter(cmsContext ContextID,
cmsUInt32Number Type, // Specific type, i.e. TYPE_RGB_8
cmsFormatterDirection Dir,
cmsUInt32Number dwFlags);
#ifndef CMS_NO_HALF_SUPPORT
// Half float
cmsFloat32Number _cmsHalf2Float(cmsUInt16Number h);
cmsUInt16Number _cmsFloat2Half(cmsFloat32Number flt);
#endif
// Transform logic ------------------------------------------------------------------------------------------------------
struct _cmstransform_struct;
typedef struct {
// 1-pixel cache (16 bits only)
cmsUInt16Number CacheIn[cmsMAXCHANNELS];
cmsUInt16Number CacheOut[cmsMAXCHANNELS];
} _cmsCACHE;
// Transformation
typedef struct _cmstransform_struct {
cmsUInt32Number InputFormat, OutputFormat; // Keep formats for further reference
// Points to transform code
_cmsTransform2Fn xform;
// Formatters, cannot be embedded into LUT because cache
cmsFormatter16 FromInput;
cmsFormatter16 ToOutput;
cmsFormatterFloat FromInputFloat;
cmsFormatterFloat ToOutputFloat;
// 1-pixel cache seed for zero as input (16 bits, read only)
_cmsCACHE Cache;
// A Pipeline holding the full (optimized) transform
cmsPipeline* Lut;
// A Pipeline holding the gamut check. It goes from the input space to bilevel
cmsPipeline* GamutCheck;
// Colorant tables
cmsNAMEDCOLORLIST* InputColorant; // Input Colorant table
cmsNAMEDCOLORLIST* OutputColorant; // Colorant table (for n chans > CMYK)
// Informational only
cmsColorSpaceSignature EntryColorSpace;
cmsColorSpaceSignature ExitColorSpace;
// White points (informative only)
cmsCIEXYZ EntryWhitePoint;
cmsCIEXYZ ExitWhitePoint;
// Profiles used to create the transform
cmsSEQ* Sequence;
cmsUInt32Number dwOriginalFlags;
cmsFloat64Number AdaptationState;
// The intent of this transform. That is usually the last intent in the profilechain, but may differ
cmsUInt32Number RenderingIntent;
// An id that uniquely identifies the running context. May be null.
cmsContext ContextID;
// A user-defined pointer that can be used to store data for transform plug-ins
void* UserData;
_cmsFreeUserDataFn FreeUserData;
// A way to provide backwards compatibility with full xform plugins
_cmsTransformFn OldXform;
} _cmsTRANSFORM;
// Copies extra channels from input to output if the original flags in the transform structure
// instructs to do so. This function is called on all standard transform functions.
void _cmsHandleExtraChannels(_cmsTRANSFORM* p, const void* in,
void* out,
cmsUInt32Number PixelsPerLine,
cmsUInt32Number LineCount,
const cmsStride* Stride);
// -----------------------------------------------------------------------------------------------------------------------
cmsHTRANSFORM _cmsChain2Lab(cmsContext ContextID,
cmsUInt32Number nProfiles,
cmsUInt32Number InputFormat,
cmsUInt32Number OutputFormat,
const cmsUInt32Number Intents[],
const cmsHPROFILE hProfiles[],
const cmsBool BPC[],
const cmsFloat64Number AdaptationStates[],
cmsUInt32Number dwFlags);
cmsToneCurve* _cmsBuildKToneCurve(cmsContext ContextID,
cmsUInt32Number nPoints,
cmsUInt32Number nProfiles,
const cmsUInt32Number Intents[],
const cmsHPROFILE hProfiles[],
const cmsBool BPC[],
const cmsFloat64Number AdaptationStates[],
cmsUInt32Number dwFlags);
cmsBool _cmsAdaptationMatrix(cmsMAT3* r, const cmsMAT3* ConeMatrix, const cmsCIEXYZ* FromIll, const cmsCIEXYZ* ToIll);
cmsBool _cmsBuildRGB2XYZtransferMatrix(cmsMAT3* r, const cmsCIExyY* WhitePoint, const cmsCIExyYTRIPLE* Primaries);
#define _lcms_internal_H
#endif