static
int WriteInputMatrixShaper(cmsIOHANDLER* m, cmsHPROFILE hProfile, cmsStage* Matrix, cmsStage* Shaper)
{
cmsColorSpaceSignature ColorSpace;
int rc;
cmsCIEXYZ BlackPointAdaptedToD50;
ColorSpace = cmsGetColorSpace(hProfile);
cmsDetectBlackPoint(&BlackPointAdaptedToD50, hProfile, INTENT_RELATIVE_COLORIMETRIC, 0);
if (ColorSpace == cmsSigGrayData) {
cmsToneCurve** ShaperCurve = _cmsStageGetPtrToCurveSet(Shaper);
rc = EmitCIEBasedA(m, ShaperCurve[0], &BlackPointAdaptedToD50);
}
else
if (ColorSpace == cmsSigRgbData) {
rc = EmitCIEBasedABC(m, GetPtrToMatrix(Matrix),
_cmsStageGetPtrToCurveSet(Shaper),
&BlackPointAdaptedToD50);
}
else {
cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Profile is not suitable for CSA. Unsupported colorspace.");
return 0;
}
return rc;
}
static
int WriteInputMatrixShaper(cmsIOHANDLER* m, cmsHPROFILE hProfile, cmsStage* Matrix, cmsStage* Shaper)
{
cmsColorSpaceSignature ColorSpace;
int rc;
cmsCIEXYZ BlackPointAdaptedToD50;
ColorSpace = cmsGetColorSpace(hProfile);
cmsDetectBlackPoint(&BlackPointAdaptedToD50, hProfile, INTENT_RELATIVE_COLORIMETRIC, 0);
if (ColorSpace == cmsSigGrayData) {
cmsToneCurve** ShaperCurve = _cmsStageGetPtrToCurveSet(Shaper);
rc = EmitCIEBasedA(m, ShaperCurve[0], &BlackPointAdaptedToD50);
}
else
if (ColorSpace == cmsSigRgbData) {
cmsMAT3 Mat;
int i, j;
memmove(&Mat, GetPtrToMatrix(Matrix), sizeof(Mat));
for (i=0; i < 3; i++)
for (j=0; j < 3; j++)
Mat.v[i].n[j] *= MAX_ENCODEABLE_XYZ;
rc = EmitCIEBasedABC(m, (cmsFloat64Number *) &Mat,
_cmsStageGetPtrToCurveSet(Shaper),
&BlackPointAdaptedToD50);
}
else {
cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Profile is not suitable for CSA. Unsupported colorspace.");
return 0;
}
return rc;
}
static
int WriteInputLUT(cmsIOHANDLER* m, cmsHPROFILE hProfile, int Intent, cmsUInt32Number dwFlags)
{
cmsHPROFILE hLab;
cmsHTRANSFORM xform;
cmsUInt32Number nChannels;
cmsUInt32Number InputFormat;
int rc;
cmsHPROFILE Profiles[2];
cmsCIEXYZ BlackPointAdaptedToD50;
// Does create a device-link based transform.
// The DeviceLink is next dumped as working CSA.
InputFormat = cmsFormatterForColorspaceOfProfile(hProfile, 2, FALSE);
nChannels = T_CHANNELS(InputFormat);
cmsDetectBlackPoint(&BlackPointAdaptedToD50, hProfile, Intent, 0);
// Adjust output to Lab4
hLab = cmsCreateLab4ProfileTHR(m ->ContextID, NULL);
Profiles[0] = hProfile;
Profiles[1] = hLab;
xform = cmsCreateMultiprofileTransform(Profiles, 2, InputFormat, TYPE_Lab_DBL, Intent, 0);
cmsCloseProfile(hLab);
if (xform == NULL) {
cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Cannot create transform Profile -> Lab");
return 0;
}
// Only 1, 3 and 4 channels are allowed
switch (nChannels) {
case 1: {
cmsToneCurve* Gray2Y = ExtractGray2Y(m ->ContextID, hProfile, Intent);
EmitCIEBasedA(m, Gray2Y, &BlackPointAdaptedToD50);
cmsFreeToneCurve(Gray2Y);
}
break;
case 3:
case 4: {
cmsUInt32Number OutFrm = TYPE_Lab_16;
cmsPipeline* DeviceLink;
_cmsTRANSFORM* v = (_cmsTRANSFORM*) xform;
DeviceLink = cmsPipelineDup(v ->Lut);
if (DeviceLink == NULL) return 0;
dwFlags |= cmsFLAGS_FORCE_CLUT;
_cmsOptimizePipeline(&DeviceLink, Intent, &InputFormat, &OutFrm, &dwFlags);
rc = EmitCIEBasedDEF(m, DeviceLink, Intent, &BlackPointAdaptedToD50);
cmsPipelineFree(DeviceLink);
}
break;
default:
cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Only 3, 4 channels supported for CSA. This profile has %d channels.", nChannels);
return 0;
}
cmsDeleteTransform(xform);
return 1;
}
