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Diffstat (limited to 'third_party/lcms2-2.6/src/cmsgmt.c')
| -rw-r--r-- | third_party/lcms2-2.6/src/cmsgmt.c | 590 |
1 files changed, 0 insertions, 590 deletions
diff --git a/third_party/lcms2-2.6/src/cmsgmt.c b/third_party/lcms2-2.6/src/cmsgmt.c deleted file mode 100644 index 1103363a78..0000000000 --- a/third_party/lcms2-2.6/src/cmsgmt.c +++ /dev/null @@ -1,590 +0,0 @@ -//--------------------------------------------------------------------------------- -// -// Little Color Management System -// Copyright (c) 1998-2012 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. -// -//--------------------------------------------------------------------------------- -// - -#include "lcms2_internal.h" - - -// 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; -} - - -// Compute K -> L* relationship. Flags may include black point compensation. In this case, -// the relationship is assumed from the profile with BPC to a black point zero. -static -cmsToneCurve* ComputeKToLstar(cmsContext ContextID, - cmsUInt32Number nPoints, - cmsUInt32Number nProfiles, - const cmsUInt32Number Intents[], - const cmsHPROFILE hProfiles[], - const cmsBool BPC[], - const cmsFloat64Number AdaptationStates[], - cmsUInt32Number dwFlags) -{ - cmsToneCurve* out = NULL; - cmsUInt32Number i; - cmsHTRANSFORM xform; - cmsCIELab Lab; - cmsFloat32Number cmyk[4]; - cmsFloat32Number* SampledPoints; - - xform = _cmsChain2Lab(ContextID, nProfiles, TYPE_CMYK_FLT, TYPE_Lab_DBL, Intents, hProfiles, BPC, AdaptationStates, dwFlags); - if (xform == NULL) return NULL; - - SampledPoints = (cmsFloat32Number*) _cmsCalloc(ContextID, nPoints, sizeof(cmsFloat32Number)); - if (SampledPoints == NULL) goto Error; - - for (i=0; i < nPoints; i++) { - - cmyk[0] = 0; - cmyk[1] = 0; - cmyk[2] = 0; - cmyk[3] = (cmsFloat32Number) ((i * 100.0) / (nPoints-1)); - - cmsDoTransform(xform, cmyk, &Lab, 1); - SampledPoints[i]= (cmsFloat32Number) (1.0 - Lab.L / 100.0); // Negate K for easier operation - } - - out = cmsBuildTabulatedToneCurveFloat(ContextID, nPoints, SampledPoints); - -Error: - - cmsDeleteTransform(xform); - if (SampledPoints) _cmsFree(ContextID, SampledPoints); - - return out; -} - - -// Compute Black tone curve on a CMYK -> CMYK transform. This is done by -// using the proof direction on both profiles to find K->L* relationship -// then joining both curves. dwFlags may include black point compensation. -cmsToneCurve* _cmsBuildKToneCurve(cmsContext ContextID, - cmsUInt32Number nPoints, - cmsUInt32Number nProfiles, - const cmsUInt32Number Intents[], - const cmsHPROFILE hProfiles[], - const cmsBool BPC[], - const cmsFloat64Number AdaptationStates[], - cmsUInt32Number dwFlags) -{ - cmsToneCurve *in, *out, *KTone; - - // Make sure CMYK -> CMYK - if (cmsGetColorSpace(hProfiles[0]) != cmsSigCmykData || - cmsGetColorSpace(hProfiles[nProfiles-1])!= cmsSigCmykData) return NULL; - - - // Make sure last is an output profile - if (cmsGetDeviceClass(hProfiles[nProfiles - 1]) != cmsSigOutputClass) return NULL; - - // Create individual curves. BPC works also as each K to L* is - // computed as a BPC to zero black point in case of L* - in = ComputeKToLstar(ContextID, nPoints, nProfiles - 1, Intents, hProfiles, BPC, AdaptationStates, dwFlags); - if (in == NULL) return NULL; - - out = ComputeKToLstar(ContextID, nPoints, 1, - Intents + (nProfiles - 1), - &hProfiles [nProfiles - 1], - BPC + (nProfiles - 1), - AdaptationStates + (nProfiles - 1), - dwFlags); - if (out == NULL) { - cmsFreeToneCurve(in); - return NULL; - } - - // Build the relationship. This effectively limits the maximum accuracy to 16 bits, but - // since this is used on black-preserving LUTs, we are not loosing accuracy in any case - KTone = cmsJoinToneCurve(ContextID, in, out, nPoints); - - // Get rid of components - cmsFreeToneCurve(in); cmsFreeToneCurve(out); - - // Something went wrong... - if (KTone == NULL) return NULL; - - // Make sure it is monotonic - if (!cmsIsToneCurveMonotonic(KTone)) { - cmsFreeToneCurve(KTone); - return NULL; - } - - return KTone; -} - - -// Gamut LUT Creation ----------------------------------------------------------------------------------------- - -// Used by gamut & softproofing - -typedef struct { - - cmsHTRANSFORM hInput; // From whatever input color space. 16 bits to DBL - cmsHTRANSFORM hForward, hReverse; // Transforms going from Lab to colorant and back - cmsFloat64Number Thereshold; // The thereshold after which is considered out of gamut - - } GAMUTCHAIN; - -// This sampler does compute gamut boundaries by comparing original -// values with a transform going back and forth. Values above ERR_THERESHOLD -// of maximum are considered out of gamut. - -#define ERR_THERESHOLD 5 - - -static -int GamutSampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo) -{ - GAMUTCHAIN* t = (GAMUTCHAIN* ) Cargo; - cmsCIELab LabIn1, LabOut1; - cmsCIELab LabIn2, LabOut2; - cmsUInt16Number Proof[cmsMAXCHANNELS], Proof2[cmsMAXCHANNELS]; - cmsFloat64Number dE1, dE2, ErrorRatio; - - // Assume in-gamut by default. - ErrorRatio = 1.0; - - // Convert input to Lab - cmsDoTransform(t -> hInput, In, &LabIn1, 1); - - // converts from PCS to colorant. This always - // does return in-gamut values, - cmsDoTransform(t -> hForward, &LabIn1, Proof, 1); - - // Now, do the inverse, from colorant to PCS. - cmsDoTransform(t -> hReverse, Proof, &LabOut1, 1); - - memmove(&LabIn2, &LabOut1, sizeof(cmsCIELab)); - - // Try again, but this time taking Check as input - cmsDoTransform(t -> hForward, &LabOut1, Proof2, 1); - cmsDoTransform(t -> hReverse, Proof2, &LabOut2, 1); - - // Take difference of direct value - dE1 = cmsDeltaE(&LabIn1, &LabOut1); - - // Take difference of converted value - dE2 = cmsDeltaE(&LabIn2, &LabOut2); - - - // if dE1 is small and dE2 is small, value is likely to be in gamut - if (dE1 < t->Thereshold && dE2 < t->Thereshold) - Out[0] = 0; - else { - - // if dE1 is small and dE2 is big, undefined. Assume in gamut - if (dE1 < t->Thereshold && dE2 > t->Thereshold) - Out[0] = 0; - else - // dE1 is big and dE2 is small, clearly out of gamut - if (dE1 > t->Thereshold && dE2 < t->Thereshold) - Out[0] = (cmsUInt16Number) _cmsQuickFloor((dE1 - t->Thereshold) + .5); - else { - - // dE1 is big and dE2 is also big, could be due to perceptual mapping - // so take error ratio - if (dE2 == 0.0) - ErrorRatio = dE1; - else - ErrorRatio = dE1 / dE2; - - if (ErrorRatio > t->Thereshold) - Out[0] = (cmsUInt16Number) _cmsQuickFloor((ErrorRatio - t->Thereshold) + .5); - else - Out[0] = 0; - } - } - - - return TRUE; -} - -// Does compute a gamut LUT going back and forth across pcs -> relativ. colorimetric intent -> pcs -// the dE obtained is then annotated on the LUT. Values truely out of gamut are clipped to dE = 0xFFFE -// and values changed are supposed to be handled by any gamut remapping, so, are out of gamut as well. -// -// **WARNING: This algorithm does assume that gamut remapping algorithms does NOT move in-gamut colors, -// of course, many perceptual and saturation intents does not work in such way, but relativ. ones should. - -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; -} - -// Total Area Coverage estimation ---------------------------------------------------------------- - -typedef struct { - cmsUInt32Number nOutputChans; - cmsHTRANSFORM hRoundTrip; - cmsFloat32Number MaxTAC; - cmsFloat32Number MaxInput[cmsMAXCHANNELS]; - -} cmsTACestimator; - - -// This callback just accounts the maximum ink dropped in the given node. It does not populate any -// memory, as the destination table is NULL. Its only purpose it to know the global maximum. -static -int EstimateTAC(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void * Cargo) -{ - cmsTACestimator* bp = (cmsTACestimator*) Cargo; - cmsFloat32Number RoundTrip[cmsMAXCHANNELS]; - cmsUInt32Number i; - cmsFloat32Number Sum; - - - // Evaluate the xform - cmsDoTransform(bp->hRoundTrip, In, RoundTrip, 1); - - // All all amounts of ink - for (Sum=0, i=0; i < bp ->nOutputChans; i++) - Sum += RoundTrip[i]; - - // If above maximum, keep track of input values - if (Sum > bp ->MaxTAC) { - - bp ->MaxTAC = Sum; - - for (i=0; i < bp ->nOutputChans; i++) { - bp ->MaxInput[i] = In[i]; - } - } - - return TRUE; - - cmsUNUSED_PARAMETER(Out); -} - - -// Detect Total area coverage of the profile -cmsFloat64Number CMSEXPORT cmsDetectTAC(cmsHPROFILE hProfile) -{ - cmsTACestimator bp; - cmsUInt32Number dwFormatter; - cmsUInt32Number GridPoints[MAX_INPUT_DIMENSIONS]; - cmsHPROFILE hLab; - cmsContext ContextID = cmsGetProfileContextID(hProfile); - - // TAC only works on output profiles - if (cmsGetDeviceClass(hProfile) != cmsSigOutputClass) { - return 0; - } - - // Create a fake formatter for result - dwFormatter = cmsFormatterForColorspaceOfProfile(hProfile, 4, TRUE); - - bp.nOutputChans = T_CHANNELS(dwFormatter); - bp.MaxTAC = 0; // Initial TAC is 0 - - // for safety - if (bp.nOutputChans >= cmsMAXCHANNELS) return 0; - - hLab = cmsCreateLab4ProfileTHR(ContextID, NULL); - if (hLab == NULL) return 0; - // Setup a roundtrip on perceptual intent in output profile for TAC estimation - bp.hRoundTrip = cmsCreateTransformTHR(ContextID, hLab, TYPE_Lab_16, - hProfile, dwFormatter, INTENT_PERCEPTUAL, cmsFLAGS_NOOPTIMIZE|cmsFLAGS_NOCACHE); - - cmsCloseProfile(hLab); - if (bp.hRoundTrip == NULL) return 0; - - // For L* we only need black and white. For C* we need many points - GridPoints[0] = 6; - GridPoints[1] = 74; - GridPoints[2] = 74; - - - if (!cmsSliceSpace16(3, GridPoints, EstimateTAC, &bp)) { - bp.MaxTAC = 0; - } - - cmsDeleteTransform(bp.hRoundTrip); - - // Results in % - return bp.MaxTAC; -} - - -// Carefully, clamp on CIELab space. - -cmsBool CMSEXPORT cmsDesaturateLab(cmsCIELab* Lab, - double amax, double amin, - double bmax, double bmin) -{ - - // Whole Luma surface to zero - - if (Lab -> L < 0) { - - Lab-> L = Lab->a = Lab-> b = 0.0; - return FALSE; - } - - // Clamp white, DISCARD HIGHLIGHTS. This is done - // in such way because icc spec doesn't allow the - // use of L>100 as a highlight means. - - if (Lab->L > 100) - Lab -> L = 100; - - // Check out gamut prism, on a, b faces - - if (Lab -> a < amin || Lab->a > amax|| - Lab -> b < bmin || Lab->b > bmax) { - - cmsCIELCh LCh; - double h, slope; - - // Falls outside a, b limits. Transports to LCh space, - // and then do the clipping - - - if (Lab -> a == 0.0) { // Is hue exactly 90? - - // atan will not work, so clamp here - Lab -> b = Lab->b < 0 ? bmin : bmax; - return TRUE; - } - - cmsLab2LCh(&LCh, Lab); - - slope = Lab -> b / Lab -> a; - h = LCh.h; - - // There are 4 zones - - if ((h >= 0. && h < 45.) || - (h >= 315 && h <= 360.)) { - - // clip by amax - Lab -> a = amax; - Lab -> b = amax * slope; - } - else - if (h >= 45. && h < 135.) - { - // clip by bmax - Lab -> b = bmax; - Lab -> a = bmax / slope; - } - else - if (h >= 135. && h < 225.) { - // clip by amin - Lab -> a = amin; - Lab -> b = amin * slope; - - } - else - if (h >= 225. && h < 315.) { - // clip by bmin - Lab -> b = bmin; - Lab -> a = bmin / slope; - } - else { - cmsSignalError(0, cmsERROR_RANGE, "Invalid angle"); - return FALSE; - } - - } - - return TRUE; -} |