// This function does create the virtual output profile, with the necessary gamut mapping
static
cmsHPROFILE CreatePCS2ITU_ICC(void)
{
cmsHPROFILE hProfile;
cmsPipeline* BToA0;
cmsStage* ColorMap;
BToA0 = cmsPipelineAlloc(0, 3, 3);
if (BToA0 == NULL) return NULL;
ColorMap = cmsStageAllocCLut16bit(0, GRID_POINTS, 3, 3, NULL);
if (ColorMap == NULL) return NULL;
cmsPipelineInsertStage(BToA0, cmsAT_BEGIN, ColorMap);
cmsStageSampleCLut16bit(ColorMap, PCS2ITU, NULL, 0);
hProfile = cmsCreateProfilePlaceholder(0);
if (hProfile == NULL) {
cmsPipelineFree(BToA0);
return NULL;
}
cmsWriteTag(hProfile, cmsSigBToA0Tag, BToA0);
cmsSetColorSpace(hProfile, cmsSigLabData);
cmsSetPCS(hProfile, cmsSigLabData);
cmsSetDeviceClass(hProfile, cmsSigColorSpaceClass);
cmsPipelineFree(BToA0);
return hProfile;
}
开发者ID:etlegacy,项目名称:EasyGen,代码行数:32,代码来源:jpgicc.c
示例3: BuildRGBOutputMatrixShaper
static
cmsPipeline* BuildRGBOutputMatrixShaper(cmsHPROFILE hProfile)
{
cmsPipeline* Lut;
cmsToneCurve *Shapes[3], *InvShapes[3];
cmsMAT3 Mat, Inv;
int i, j;
cmsContext ContextID = cmsGetProfileContextID(hProfile);
if (!ReadICCMatrixRGB2XYZ(&Mat, hProfile))
return NULL;
if (!_cmsMAT3inverse(&Mat, &Inv))
return NULL;
// XYZ PCS in encoded in 1.15 format, and the matrix input should come in 0..0xffff range, so
// we need to adjust the input by a << 1 to obtain a 1.16 fixed and then by a factor of
// (0xffff/0x10000) to put data in 0..0xffff range. Total factor is (2.0*65535.0)/65536.0;
for (i=0; i < 3; i++)
for (j=0; j < 3; j++)
Inv.v[i].n[j] *= OutpAdj;
Shapes[0] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigRedTRCTag);
Shapes[1] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGreenTRCTag);
Shapes[2] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigBlueTRCTag);
if (!Shapes[0] || !Shapes[1] || !Shapes[2])
return NULL;
InvShapes[0] = cmsReverseToneCurve(Shapes[0]);
InvShapes[1] = cmsReverseToneCurve(Shapes[1]);
InvShapes[2] = cmsReverseToneCurve(Shapes[2]);
if (!InvShapes[0] || !InvShapes[1] || !InvShapes[2]) {
return NULL;
}
Lut = cmsPipelineAlloc(ContextID, 3, 3);
if (Lut != NULL) {
// Note that it is certainly possible a single profile would have a LUT based
// tag for output working in lab and a matrix-shaper for the fallback cases.
// This is not allowed by the spec, but this code is tolerant to those cases
if (cmsGetPCS(hProfile) == cmsSigLabData) {
cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLab2XYZ(ContextID));
}
cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 3, (cmsFloat64Number*) &Inv, NULL));
cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 3, InvShapes));
}
cmsFreeToneCurveTriple(InvShapes);
return Lut;
}
static
cmsPipeline* BuildRGBOutputMatrixShaper(cmsHPROFILE hProfile)
{
cmsPipeline* Lut;
cmsToneCurve *Shapes[3], *InvShapes[3];
cmsMAT3 Mat, Inv;
int i, j;
cmsContext ContextID = cmsGetProfileContextID(hProfile);
if (!ReadICCMatrixRGB2XYZ(&Mat, hProfile))
return NULL;
if (!_cmsMAT3inverse(&Mat, &Inv))
return NULL;
// XYZ PCS in encoded in 1.15 format, and the matrix input should come in 0..0xffff range, so
// we need to adjust the input by a << 1 to obtain a 1.16 fixed and then by a factor of
// (0xffff/0x10000) to put data in 0..0xffff range. Total factor is (2.0*65535.0)/65536.0;
for (i=0; i < 3; i++)
for (j=0; j < 3; j++)
Inv.v[i].n[j] *= OutpAdj;
Shapes[0] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigRedTRCTag);
Shapes[1] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGreenTRCTag);
Shapes[2] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigBlueTRCTag);
if (!Shapes[0] || !Shapes[1] || !Shapes[2])
return NULL;
InvShapes[0] = cmsReverseToneCurve(Shapes[0]);
InvShapes[1] = cmsReverseToneCurve(Shapes[1]);
InvShapes[2] = cmsReverseToneCurve(Shapes[2]);
if (!InvShapes[0] || !InvShapes[1] || !InvShapes[2]) {
return NULL;
}
Lut = cmsPipelineAlloc(ContextID, 3, 3);
if (Lut != NULL) {
cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 3, (cmsFloat64Number*) &Inv, NULL));
cmsStage* mpe = cmsStageAllocToneCurves(ContextID, 3, InvShapes);
if (mpe)
cmsPipelineInsertStage(Lut, cmsAT_END, mpe);
else {
cmsPipelineFree(Lut);
Lut = NULL;
}
}
cmsFreeToneCurveTriple(InvShapes);
return Lut;
}
// RGB Matrix shaper
static
cmsPipeline* BuildRGBInputMatrixShaper(cmsHPROFILE hProfile)
{
cmsPipeline* Lut;
cmsMAT3 Mat;
cmsToneCurve *Shapes[3];
cmsContext ContextID = cmsGetProfileContextID(hProfile);
int i, j;
if (!ReadICCMatrixRGB2XYZ(&Mat, hProfile)) return NULL;
// XYZ PCS in encoded in 1.15 format, and the matrix output comes in 0..0xffff range, so
// we need to adjust the output by a factor of (0x10000/0xffff) to put data in
// a 1.16 range, and then a >> 1 to obtain 1.15. The total factor is (65536.0)/(65535.0*2)
for (i=0; i < 3; i++)
for (j=0; j < 3; j++)
Mat.v[i].n[j] *= InpAdj;
Shapes[0] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigRedTRCTag);
Shapes[1] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGreenTRCTag);
Shapes[2] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigBlueTRCTag);
if (!Shapes[0] || !Shapes[1] || !Shapes[2])
return NULL;
Lut = cmsPipelineAlloc(ContextID, 3, 3);
if (Lut != NULL) {
if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 3, Shapes)) ||
!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 3, (cmsFloat64Number*) &Mat, NULL)))
goto Error;
// Note that it is certainly possible a single profile would have a LUT based
// tag for output working in lab and a matrix-shaper for the fallback cases.
// This is not allowed by the spec, but this code is tolerant to those cases
if (cmsGetPCS(hProfile) == cmsSigLabData) {
if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocXYZ2Lab(ContextID)))
goto Error;
}
}
return Lut;
Error:
cmsPipelineFree(Lut);
return NULL;
}
开发者ID:AndresPozo,项目名称:PCL,代码行数:52,代码来源:cmsio1.c
示例8: cmsCreateNULLProfileTHR
// Creates a fake NULL profile. This profile return 1 channel as always 0.
// Is useful only for gamut checking tricks
cmsHPROFILE CMSEXPORT cmsCreateNULLProfileTHR(cmsContext ContextID)
{
cmsHPROFILE hProfile;
cmsPipeline* LUT = NULL;
cmsStage* PostLin;
cmsToneCurve* EmptyTab;
cmsUInt16Number Zero[2] = { 0, 0 };
hProfile = cmsCreateProfilePlaceholder(ContextID);
if (!hProfile) // can't allocate
return NULL;
cmsSetProfileVersion(hProfile, 4.3);
if (!SetTextTags(hProfile, L"NULL profile built-in")) goto Error;
cmsSetDeviceClass(hProfile, cmsSigOutputClass);
cmsSetColorSpace(hProfile, cmsSigGrayData);
cmsSetPCS(hProfile, cmsSigLabData);
// An empty LUTs is all we need
LUT = cmsPipelineAlloc(ContextID, 1, 1);
if (LUT == NULL) goto Error;
EmptyTab = cmsBuildTabulatedToneCurve16(ContextID, 2, Zero);
PostLin = cmsStageAllocToneCurves(ContextID, 1, &EmptyTab);
cmsFreeToneCurve(EmptyTab);
if (!cmsPipelineInsertStage(LUT, cmsAT_END, PostLin))
goto Error;
if (!cmsWriteTag(hProfile, cmsSigBToA0Tag, (void*) LUT)) goto Error;
if (!cmsWriteTag(hProfile, cmsSigMediaWhitePointTag, cmsD50_XYZ())) goto Error;
cmsPipelineFree(LUT);
return hProfile;
Error:
if (LUT != NULL)
cmsPipelineFree(LUT);
if (hProfile != NULL)
cmsCloseProfile(hProfile);
return NULL;
}
// RGB Matrix shaper
static
cmsPipeline* BuildRGBInputMatrixShaper(cmsHPROFILE hProfile)
{
cmsPipeline* Lut;
cmsMAT3 Mat;
cmsToneCurve *Shapes[3];
cmsContext ContextID = cmsGetProfileContextID(hProfile);
int i, j;
if (!ReadICCMatrixRGB2XYZ(&Mat, hProfile)) return NULL;
// XYZ PCS in encoded in 1.15 format, and the matrix output comes in 0..0xffff range, so
// we need to adjust the output by a factor of (0x10000/0xffff) to put data in
// a 1.16 range, and then a >> 1 to obtain 1.15. The total factor is (65536.0)/(65535.0*2)
for (i=0; i < 3; i++)
for (j=0; j < 3; j++)
Mat.v[i].n[j] *= InpAdj;
Shapes[0] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigRedTRCTag);
Shapes[1] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGreenTRCTag);
Shapes[2] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigBlueTRCTag);
if (!Shapes[0] || !Shapes[1] || !Shapes[2])
return NULL;
Lut = cmsPipelineAlloc(ContextID, 3, 3);
if (Lut != NULL) {
cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 3, Shapes));
cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 3, (cmsFloat64Number*) &Mat, NULL));
}
return Lut;
}
// This is the entry for black-plane preserving, which are non-ICC
static
cmsPipeline* BlackPreservingKPlaneIntents(cmsContext ContextID,
cmsUInt32Number nProfiles,
cmsUInt32Number TheIntents[],
cmsHPROFILE hProfiles[],
cmsBool BPC[],
cmsFloat64Number AdaptationStates[],
cmsUInt32Number dwFlags)
{
PreserveKPlaneParams bp;
cmsPipeline* Result = NULL;
cmsUInt32Number ICCIntents[256];
cmsStage* CLUT;
cmsUInt32Number i, nGridPoints;
cmsHPROFILE hLab;
// Sanity check
if (nProfiles < 1 || nProfiles > 255) return NULL;
// Translate black-preserving intents to ICC ones
for (i=0; i < nProfiles; i++)
ICCIntents[i] = TranslateNonICCIntents(TheIntents[i]);
// Check for non-cmyk profiles
if (cmsGetColorSpace(hProfiles[0]) != cmsSigCmykData ||
!(cmsGetColorSpace(hProfiles[nProfiles-1]) == cmsSigCmykData ||
cmsGetDeviceClass(hProfiles[nProfiles-1]) == cmsSigOutputClass))
return DefaultICCintents(ContextID, nProfiles, ICCIntents, hProfiles, BPC, AdaptationStates, dwFlags);
// Allocate an empty LUT for holding the result
Result = cmsPipelineAlloc(ContextID, 4, 4);
if (Result == NULL) return NULL;
memset(&bp, 0, sizeof(bp));
// We need the input LUT of the last profile, assuming this one is responsible of
// black generation. This LUT will be seached in inverse order.
bp.LabK2cmyk = _cmsReadInputLUT(hProfiles[nProfiles-1], INTENT_RELATIVE_COLORIMETRIC);
if (bp.LabK2cmyk == NULL) goto Cleanup;
// Get total area coverage (in 0..1 domain)
bp.MaxTAC = cmsDetectTAC(hProfiles[nProfiles-1]) / 100.0;
if (bp.MaxTAC <= 0) goto Cleanup;
// Create a LUT holding normal ICC transform
bp.cmyk2cmyk = DefaultICCintents(ContextID,
nProfiles,
ICCIntents,
hProfiles,
BPC,
AdaptationStates,
dwFlags);
if (bp.cmyk2cmyk == NULL) goto Cleanup;
// Now the tone curve
bp.KTone = _cmsBuildKToneCurve(ContextID, 4096, nProfiles,
ICCIntents,
hProfiles,
BPC,
AdaptationStates,
dwFlags);
if (bp.KTone == NULL) goto Cleanup;
// To measure the output, Last profile to Lab
hLab = cmsCreateLab4ProfileTHR(ContextID, NULL);
bp.hProofOutput = cmsCreateTransformTHR(ContextID, hProfiles[nProfiles-1],
CHANNELS_SH(4)|BYTES_SH(2), hLab, TYPE_Lab_DBL,
INTENT_RELATIVE_COLORIMETRIC,
cmsFLAGS_NOCACHE|cmsFLAGS_NOOPTIMIZE);
if ( bp.hProofOutput == NULL) goto Cleanup;
// Same as anterior, but lab in the 0..1 range
bp.cmyk2Lab = cmsCreateTransformTHR(ContextID, hProfiles[nProfiles-1],
FLOAT_SH(1)|CHANNELS_SH(4)|BYTES_SH(4), hLab,
FLOAT_SH(1)|CHANNELS_SH(3)|BYTES_SH(4),
INTENT_RELATIVE_COLORIMETRIC,
cmsFLAGS_NOCACHE|cmsFLAGS_NOOPTIMIZE);
if (bp.cmyk2Lab == NULL) goto Cleanup;
cmsCloseProfile(hLab);
// Error estimation (for debug only)
bp.MaxError = 0;
// How many gridpoints are we going to use?
nGridPoints = _cmsReasonableGridpointsByColorspace(cmsSigCmykData, dwFlags);
CLUT = cmsStageAllocCLut16bit(ContextID, nGridPoints, 4, 4, NULL);
if (CLUT == NULL) goto Cleanup;
if (!cmsPipelineInsertStage(Result, cmsAT_BEGIN, CLUT))
goto Cleanup;
cmsStageSampleCLut16bit(CLUT, BlackPreservingSampler, (void*) &bp, 0);
Cleanup:
//.........这里部分代码省略.........
// This is the entry for black-preserving K-only intents, which are non-ICC
static
cmsPipeline* BlackPreservingKOnlyIntents(cmsContext ContextID,
cmsUInt32Number nProfiles,
cmsUInt32Number TheIntents[],
cmsHPROFILE hProfiles[],
cmsBool BPC[],
cmsFloat64Number AdaptationStates[],
cmsUInt32Number dwFlags)
{
GrayOnlyParams bp;
cmsPipeline* Result;
cmsUInt32Number ICCIntents[256];
cmsStage* CLUT;
cmsUInt32Number i, nGridPoints;
// Sanity check
if (nProfiles < 1 || nProfiles > 255) return NULL;
// Translate black-preserving intents to ICC ones
for (i=0; i < nProfiles; i++)
ICCIntents[i] = TranslateNonICCIntents(TheIntents[i]);
// Check for non-cmyk profiles
if (cmsGetColorSpace(hProfiles[0]) != cmsSigCmykData ||
cmsGetColorSpace(hProfiles[nProfiles-1]) != cmsSigCmykData)
return DefaultICCintents(ContextID, nProfiles, ICCIntents, hProfiles, BPC, AdaptationStates, dwFlags);
memset(&bp, 0, sizeof(bp));
// Allocate an empty LUT for holding the result
Result = cmsPipelineAlloc(ContextID, 4, 4);
if (Result == NULL) return NULL;
// Create a LUT holding normal ICC transform
bp.cmyk2cmyk = DefaultICCintents(ContextID,
nProfiles,
ICCIntents,
hProfiles,
BPC,
AdaptationStates,
dwFlags);
if (bp.cmyk2cmyk == NULL) goto Error;
// Now, compute the tone curve
bp.KTone = _cmsBuildKToneCurve(ContextID,
4096,
nProfiles,
ICCIntents,
hProfiles,
BPC,
AdaptationStates,
dwFlags);
if (bp.KTone == NULL) goto Error;
// How many gridpoints are we going to use?
nGridPoints = _cmsReasonableGridpointsByColorspace(cmsSigCmykData, dwFlags);
// Create the CLUT. 16 bits
CLUT = cmsStageAllocCLut16bit(ContextID, nGridPoints, 4, 4, NULL);
if (CLUT == NULL) goto Error;
// This is the one and only MPE in this LUT
if (!cmsPipelineInsertStage(Result, cmsAT_BEGIN, CLUT))
goto Error;
// Sample it. We cannot afford pre/post linearization this time.
if (!cmsStageSampleCLut16bit(CLUT, BlackPreservingGrayOnlySampler, (void*) &bp, 0))
goto Error;
// Get rid of xform and tone curve
cmsPipelineFree(bp.cmyk2cmyk);
cmsFreeToneCurve(bp.KTone);
return Result;
Error:
if (bp.cmyk2cmyk != NULL) cmsPipelineFree(bp.cmyk2cmyk);
if (bp.KTone != NULL) cmsFreeToneCurve(bp.KTone);
if (Result != NULL) cmsPipelineFree(Result);
return NULL;
}
// This one includes abstract profiles as well. Matrix-shaper cannot be obtained on that device class. The
// tag name here may default to AToB0
cmsPipeline* _cmsReadDevicelinkLUT(cmsHPROFILE hProfile, int Intent)
{
cmsPipeline* Lut;
cmsTagTypeSignature OriginalType;
cmsTagSignature tag16;
cmsTagSignature tagFloat;
cmsContext ContextID = cmsGetProfileContextID(hProfile);
if (Intent < INTENT_PERCEPTUAL || Intent > INTENT_ABSOLUTE_COLORIMETRIC)
return NULL;
tag16 = Device2PCS16[Intent];
tagFloat = Device2PCSFloat[Intent];
// On named color, take the appropriate tag
if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
cmsNAMEDCOLORLIST* nc = (cmsNAMEDCOLORLIST*)cmsReadTag(hProfile, cmsSigNamedColor2Tag);
if (nc == NULL) return NULL;
Lut = cmsPipelineAlloc(ContextID, 0, 0);
if (Lut == NULL)
goto Error;
if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocNamedColor(nc, FALSE)))
goto Error;
if (cmsGetColorSpace(hProfile) == cmsSigLabData)
if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
goto Error;
return Lut;
Error:
cmsPipelineFree(Lut);
cmsFreeNamedColorList(nc);
return NULL;
}
if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
// Floating point LUT are always V
return _cmsReadFloatDevicelinkTag(hProfile, tagFloat);
}
tagFloat = Device2PCSFloat[0];
if (cmsIsTag(hProfile, tagFloat)) {
return cmsPipelineDup((cmsPipeline*)cmsReadTag(hProfile, tagFloat));
}
if (!cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
tag16 = Device2PCS16[0];
if (!cmsIsTag(hProfile, tag16)) return NULL;
}
// Check profile version and LUT type. Do the necessary adjustments if needed
// Read the tag
Lut = (cmsPipeline*)cmsReadTag(hProfile, tag16);
if (Lut == NULL) return NULL;
// The profile owns the Lut, so we need to copy it
Lut = cmsPipelineDup(Lut);
if (Lut == NULL) return NULL;
// Now it is time for a controversial stuff. I found that for 3D LUTS using
// Lab used as indexer space, trilinear interpolation should be used
if (cmsGetPCS(hProfile) == cmsSigLabData)
ChangeInterpolationToTrilinear(Lut);
// After reading it, we have info about the original type
OriginalType = _cmsGetTagTrueType(hProfile, tag16);
// We need to adjust data for Lab16 on output
if (OriginalType != cmsSigLut16Type) return Lut;
// Here it is possible to get Lab on both sides
if (cmsGetColorSpace(hProfile) == cmsSigLabData) {
if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID)))
goto Error2;
}
if (cmsGetPCS(hProfile) == cmsSigLabData) {
if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
goto Error2;
}
return Lut;
Error2:
cmsPipelineFree(Lut);
return NULL;
}
开发者ID:AndresPozo,项目名称:PCL,代码行数:100,代码来源:cmsio1.c
示例17: _cmsReadInputLUT
// Read and create a BRAND NEW MPE LUT from a given profile. All stuff dependent of version, etc
// is adjusted here in order to create a LUT that takes care of all those details.
// We add intent = -1 as a way to read matrix shaper always, no matter of other LUT
cmsPipeline* _cmsReadInputLUT(cmsHPROFILE hProfile, int Intent)
{
cmsTagTypeSignature OriginalType;
cmsTagSignature tag16;
cmsTagSignature tagFloat;
cmsContext ContextID = cmsGetProfileContextID(hProfile);
// On named color, take the appropriate tag
if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
cmsPipeline* Lut;
cmsNAMEDCOLORLIST* nc = (cmsNAMEDCOLORLIST*) cmsReadTag(hProfile, cmsSigNamedColor2Tag);
if (nc == NULL) return NULL;
Lut = cmsPipelineAlloc(ContextID, 0, 0);
if (Lut == NULL) {
cmsFreeNamedColorList(nc);
return NULL;
}
if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocNamedColor(nc, TRUE)) ||
!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID))) {
cmsPipelineFree(Lut);
return NULL;
}
return Lut;
}
// This is an attempt to reuse this function to retrieve the matrix-shaper as pipeline no
// matter other LUT are present and have precedence. Intent = -1 means just this.
if (Intent >= INTENT_PERCEPTUAL && Intent <= INTENT_ABSOLUTE_COLORIMETRIC) {
tag16 = Device2PCS16[Intent];
tagFloat = Device2PCSFloat[Intent];
if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
// Floating point LUT are always V4, but the encoding range is no
// longer 0..1.0, so we need to add an stage depending on the color space
return _cmsReadFloatInputTag(hProfile, tagFloat);
}
// Revert to perceptual if no tag is found
if (!cmsIsTag(hProfile, tag16)) {
tag16 = Device2PCS16[0];
}
if (cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
// Check profile version and LUT type. Do the necessary adjustments if needed
// First read the tag
cmsPipeline* Lut = (cmsPipeline*) cmsReadTag(hProfile, tag16);
if (Lut == NULL) return NULL;
// After reading it, we have now info about the original type
OriginalType = _cmsGetTagTrueType(hProfile, tag16);
// The profile owns the Lut, so we need to copy it
Lut = cmsPipelineDup(Lut);
// We need to adjust data only for Lab16 on output
if (OriginalType != cmsSigLut16Type || cmsGetPCS(hProfile) != cmsSigLabData)
return Lut;
// If the input is Lab, add also a conversion at the begin
if (cmsGetColorSpace(hProfile) == cmsSigLabData &&
!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID)))
goto Error;
// Add a matrix for conversion V2 to V4 Lab PCS
if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
goto Error;
return Lut;
Error:
cmsPipelineFree(Lut);
return NULL;
}
}
// Lut was not found, try to create a matrix-shaper
// Check if this is a grayscale profile.
if (cmsGetColorSpace(hProfile) == cmsSigGrayData) {
// if so, build appropriate conversion tables.
// The tables are the PCS iluminant, scaled across GrayTRC
return BuildGrayInputMatrixPipeline(hProfile);
}
// Not gray, create a normal matrix-shaper
return BuildRGBInputMatrixShaper(hProfile);
}
开发者ID:AndresPozo,项目名称:PCL,代码行数:98,代码来源:cmsio1.c
示例18: cmsCreateInkLimitingDeviceLinkTHR
cmsHPROFILE CMSEXPORT cmsCreateInkLimitingDeviceLinkTHR(cmsContext ContextID,
cmsColorSpaceSignature ColorSpace,
cmsFloat64Number Limit)
{
cmsHPROFILE hICC;
cmsPipeline* LUT;
cmsStage* CLUT;
int nChannels;
if (ColorSpace != cmsSigCmykData) {
cmsSignalError(ContextID, cmsERROR_COLORSPACE_CHECK, "InkLimiting: Only CMYK currently supported");
return NULL;
}
if (Limit < 0.0 || Limit > 400) {
cmsSignalError(ContextID, cmsERROR_RANGE, "InkLimiting: Limit should be between 0..400");
if (Limit < 0) Limit = 0;
if (Limit > 400) Limit = 400;
}
hICC = cmsCreateProfilePlaceholder(ContextID);
if (!hICC) // can't allocate
return NULL;
cmsSetProfileVersion(hICC, 4.3);
cmsSetDeviceClass(hICC, cmsSigLinkClass);
cmsSetColorSpace(hICC, ColorSpace);
cmsSetPCS(hICC, ColorSpace);
cmsSetHeaderRenderingIntent(hICC, INTENT_PERCEPTUAL);
// Creates a Pipeline with 3D grid only
LUT = cmsPipelineAlloc(ContextID, 4, 4);
if (LUT == NULL) goto Error;
nChannels = cmsChannelsOf(ColorSpace);
CLUT = cmsStageAllocCLut16bit(ContextID, 17, nChannels, nChannels, NULL);
if (CLUT == NULL) goto Error;
if (!cmsStageSampleCLut16bit(CLUT, InkLimitingSampler, (void*) &Limit, 0)) goto Error;
if (!cmsPipelineInsertStage(LUT, cmsAT_BEGIN, _cmsStageAllocIdentityCurves(ContextID, nChannels)) ||
!cmsPipelineInsertStage(LUT, cmsAT_END, CLUT) ||
!cmsPipelineInsertStage(LUT, cmsAT_END, _cmsStageAllocIdentityCurves(ContextID, nChannels)))
goto Error;
// Create tags
if (!SetTextTags(hICC, L"ink-limiting built-in")) goto Error;
if (!cmsWriteTag(hICC, cmsSigAToB0Tag, (void*) LUT)) goto Error;
if (!SetSeqDescTag(hICC, "ink-limiting built-in")) goto Error;
// cmsPipeline is already on virtual profile
cmsPipelineFree(LUT);
// Ok, done
return hICC;
Error:
if (LUT != NULL)
cmsPipelineFree(LUT);
if (hICC != NULL)
cmsCloseProfile(hICC);
return NULL;
}
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