// Multiprofile transforms: Gamut check is not available here, as it is unclear from which profile the gamut comes.
cmsHTRANSFORM CMSEXPORT cmsCreateMultiprofileTransformTHR(cmsContext ContextID,
cmsHPROFILE hProfiles[],
cmsUInt32Number nProfiles,
cmsUInt32Number InputFormat,
cmsUInt32Number OutputFormat,
cmsUInt32Number Intent,
cmsUInt32Number dwFlags)
{
cmsUInt32Number i;
cmsBool BPC[256];
cmsUInt32Number Intents[256];
cmsFloat64Number AdaptationStates[256];
if (nProfiles <= 0 || nProfiles > 255) {
cmsSignalError(ContextID, cmsERROR_RANGE, "Wrong number of profiles. 1..255 expected, %d found.", nProfiles);
return NULL;
}
for (i=0; i < nProfiles; i++) {
BPC[i] = dwFlags & cmsFLAGS_BLACKPOINTCOMPENSATION ? TRUE : FALSE;
Intents[i] = Intent;
AdaptationStates[i] = cmsSetAdaptationStateTHR(ContextID, -1);
}
return cmsCreateExtendedTransform(ContextID, nProfiles, hProfiles, BPC, Intents, AdaptationStates, NULL, 0, InputFormat, OutputFormat, dwFlags);
}
cmsHTRANSFORM CMSEXPORT cmsCreateProofingTransformTHR(cmsContext ContextID,
cmsHPROFILE InputProfile,
cmsUInt32Number InputFormat,
cmsHPROFILE OutputProfile,
cmsUInt32Number OutputFormat,
cmsHPROFILE ProofingProfile,
cmsUInt32Number nIntent,
cmsUInt32Number ProofingIntent,
cmsUInt32Number dwFlags)
{
cmsHPROFILE hArray[4];
cmsUInt32Number Intents[4];
cmsBool BPC[4];
cmsFloat64Number Adaptation[4];
cmsBool DoBPC = (dwFlags & cmsFLAGS_BLACKPOINTCOMPENSATION) ? TRUE : FALSE;
hArray[0] = InputProfile; hArray[1] = ProofingProfile; hArray[2] = ProofingProfile; hArray[3] = OutputProfile;
Intents[0] = nIntent; Intents[1] = nIntent; Intents[2] = INTENT_RELATIVE_COLORIMETRIC; Intents[3] = ProofingIntent;
BPC[0] = DoBPC; BPC[1] = DoBPC; BPC[2] = 0; BPC[3] = 0;
Adaptation[0] = Adaptation[1] = Adaptation[2] = Adaptation[3] = cmsSetAdaptationStateTHR(ContextID, -1);
if (!(dwFlags & (cmsFLAGS_SOFTPROOFING|cmsFLAGS_GAMUTCHECK)))
return cmsCreateTransformTHR(ContextID, InputProfile, InputFormat, OutputProfile, OutputFormat, nIntent, dwFlags);
return cmsCreateExtendedTransform(ContextID, 4, hArray, BPC, Intents, Adaptation,
ProofingProfile, 1, InputFormat, OutputFormat, dwFlags);
}
// Auxiliar: append a Lab identity after the given sequence of profiles
// and return the transform. Lab profile is closed, rest of profiles are kept open.
cmsHTRANSFORM _cmsChain2Lab(cmsContext ContextID,
cmsUInt32Number nProfiles,
cmsUInt32Number InputFormat,
cmsUInt32Number OutputFormat,
const cmsUInt32Number Intents[],
const cmsHPROFILE hProfiles[],
const cmsBool BPC[],
const cmsFloat64Number AdaptationStates[],
cmsUInt32Number dwFlags)
{
cmsHTRANSFORM xform;
cmsHPROFILE hLab;
cmsHPROFILE ProfileList[256];
cmsBool BPCList[256];
cmsFloat64Number AdaptationList[256];
cmsUInt32Number IntentList[256];
cmsUInt32Number i;
// This is a rather big number and there is no need of dynamic memory
// since we are adding a profile, 254 + 1 = 255 and this is the limit
if (nProfiles > 254) return NULL;
// The output space
hLab = cmsCreateLab4ProfileTHR(ContextID, NULL);
if (hLab == NULL) return NULL;
// Create a copy of parameters
for (i=0; i < nProfiles; i++) {
ProfileList[i] = hProfiles[i];
BPCList[i] = BPC[i];
AdaptationList[i] = AdaptationStates[i];
IntentList[i] = Intents[i];
}
// Place Lab identity at chain's end.
ProfileList[nProfiles] = hLab;
BPCList[nProfiles] = 0;
AdaptationList[nProfiles] = 1.0;
IntentList[nProfiles] = INTENT_RELATIVE_COLORIMETRIC;
// Create the transform
xform = cmsCreateExtendedTransform(ContextID, nProfiles + 1, ProfileList,
BPCList,
IntentList,
AdaptationList,
NULL, 0,
InputFormat,
OutputFormat,
dwFlags);
cmsCloseProfile(hLab);
return xform;
}
// PCS -> PCS round trip transform, always uses relative intent on the device -> pcs
static
cmsHTRANSFORM CreateRoundtripXForm(cmsHPROFILE hProfile, cmsUInt32Number nIntent)
{
cmsHPROFILE hLab = cmsCreateLab4Profile(NULL);
cmsHTRANSFORM xform;
cmsBool BPC[4] = { FALSE, FALSE, FALSE, FALSE };
cmsFloat64Number States[4] = { 1.0, 1.0, 1.0, 1.0 };
cmsHPROFILE hProfiles[4];
cmsUInt32Number Intents[4];
cmsContext ContextID = cmsGetProfileContextID(hProfile);
hProfiles[0] = hLab; hProfiles[1] = hProfile; hProfiles[2] = hProfile; hProfiles[3] = hLab;
Intents[0] = INTENT_RELATIVE_COLORIMETRIC; Intents[1] = nIntent; Intents[2] = INTENT_RELATIVE_COLORIMETRIC; Intents[3] = INTENT_RELATIVE_COLORIMETRIC;
xform = cmsCreateExtendedTransform(ContextID, 4, hProfiles, BPC, Intents,
States, NULL, 0, TYPE_Lab_DBL, TYPE_Lab_DBL, cmsFLAGS_NOCACHE|cmsFLAGS_NOOPTIMIZE);
cmsCloseProfile(hLab);
return xform;
}
cmsPipeline* _cmsCreateGamutCheckPipeline(cmsContext ContextID,
cmsHPROFILE hProfiles[],
cmsBool BPC[],
cmsUInt32Number Intents[],
cmsFloat64Number AdaptationStates[],
cmsUInt32Number nGamutPCSposition,
cmsHPROFILE hGamut)
{
cmsHPROFILE hLab;
cmsPipeline* Gamut;
cmsStage* CLUT;
cmsUInt32Number dwFormat;
GAMUTCHAIN Chain;
int nChannels, nGridpoints;
cmsColorSpaceSignature ColorSpace;
cmsUInt32Number i;
cmsHPROFILE ProfileList[256];
cmsBool BPCList[256];
cmsFloat64Number AdaptationList[256];
cmsUInt32Number IntentList[256];
memset(&Chain, 0, sizeof(GAMUTCHAIN));
if (nGamutPCSposition <= 0 || nGamutPCSposition > 255) {
cmsSignalError(ContextID, cmsERROR_RANGE, "Wrong position of PCS. 1..255 expected, %d found.", nGamutPCSposition);
return NULL;
}
hLab = cmsCreateLab4ProfileTHR(ContextID, NULL);
if (hLab == NULL) return NULL;
// The figure of merit. On matrix-shaper profiles, should be almost zero as
// the conversion is pretty exact. On LUT based profiles, different resolutions
// of input and output CLUT may result in differences.
if (cmsIsMatrixShaper(hGamut)) {
Chain.Thereshold = 1.0;
}
else {
Chain.Thereshold = ERR_THERESHOLD;
}
// Create a copy of parameters
for (i=0; i < nGamutPCSposition; i++) {
ProfileList[i] = hProfiles[i];
BPCList[i] = BPC[i];
AdaptationList[i] = AdaptationStates[i];
IntentList[i] = Intents[i];
}
// Fill Lab identity
ProfileList[nGamutPCSposition] = hLab;
BPCList[nGamutPCSposition] = 0;
AdaptationList[nGamutPCSposition] = 1.0;
IntentList[nGamutPCSposition] = INTENT_RELATIVE_COLORIMETRIC;
ColorSpace = cmsGetColorSpace(hGamut);
nChannels = cmsChannelsOf(ColorSpace);
nGridpoints = _cmsReasonableGridpointsByColorspace(ColorSpace, cmsFLAGS_HIGHRESPRECALC);
dwFormat = (CHANNELS_SH(nChannels)|BYTES_SH(2));
// 16 bits to Lab double
Chain.hInput = cmsCreateExtendedTransform(ContextID,
nGamutPCSposition + 1,
ProfileList,
BPCList,
IntentList,
AdaptationList,
NULL, 0,
dwFormat, TYPE_Lab_DBL,
cmsFLAGS_NOCACHE);
// Does create the forward step. Lab double to device
dwFormat = (CHANNELS_SH(nChannels)|BYTES_SH(2));
Chain.hForward = cmsCreateTransformTHR(ContextID,
hLab, TYPE_Lab_DBL,
hGamut, dwFormat,
INTENT_RELATIVE_COLORIMETRIC,
cmsFLAGS_NOCACHE);
// Does create the backwards step
Chain.hReverse = cmsCreateTransformTHR(ContextID, hGamut, dwFormat,
hLab, TYPE_Lab_DBL,
INTENT_RELATIVE_COLORIMETRIC,
cmsFLAGS_NOCACHE);
// All ok?
if (Chain.hInput && Chain.hForward && Chain.hReverse) {
// Go on, try to compute gamut LUT from PCS. This consist on a single channel containing
// dE when doing a transform back and forth on the colorimetric intent.
Gamut = cmsPipelineAlloc(ContextID, 3, 1);
if (Gamut != NULL) {
CLUT = cmsStageAllocCLut16bit(ContextID, nGridpoints, nChannels, 1, NULL);
if (!cmsPipelineInsertStage(Gamut, cmsAT_BEGIN, CLUT)) {
cmsPipelineFree(Gamut);
Gamut = NULL;
}
else {
cmsStageSampleCLut16bit(CLUT, GamutSampler, (void*) &Chain, 0);
}
}
}
else
Gamut = NULL; // Didn't work...
// Free all needed stuff.
if (Chain.hInput) cmsDeleteTransform(Chain.hInput);
if (Chain.hForward) cmsDeleteTransform(Chain.hForward);
if (Chain.hReverse) cmsDeleteTransform(Chain.hReverse);
if (hLab) cmsCloseProfile(hLab);
// And return computed hull
return Gamut;
}