//--------------------------------------------------------------------------------- // // 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. // //--------------------------------------------------------------------------------- // #include "lcms2_internal.h" // Virtual (built-in) profiles // ----------------------------------------------------------------------------------- static cmsBool SetTextTags(cmsHPROFILE hProfile, const wchar_t* Description) { cmsMLU *DescriptionMLU, *CopyrightMLU; cmsBool rc = FALSE; cmsContext ContextID = cmsGetProfileContextID(hProfile); DescriptionMLU = cmsMLUalloc(ContextID, 1); CopyrightMLU = cmsMLUalloc(ContextID, 1); if (DescriptionMLU == NULL || CopyrightMLU == NULL) goto Error; if (!cmsMLUsetWide(DescriptionMLU, "en", "US", Description)) goto Error; if (!cmsMLUsetWide(CopyrightMLU, "en", "US", L"No copyright, use freely")) goto Error; if (!cmsWriteTag(hProfile, cmsSigProfileDescriptionTag, DescriptionMLU)) goto Error; if (!cmsWriteTag(hProfile, cmsSigCopyrightTag, CopyrightMLU)) goto Error; rc = TRUE; Error: if (DescriptionMLU) cmsMLUfree(DescriptionMLU); if (CopyrightMLU) cmsMLUfree(CopyrightMLU); return rc; } static cmsBool SetSeqDescTag(cmsHPROFILE hProfile, const char* Model) { cmsBool rc = FALSE; cmsContext ContextID = cmsGetProfileContextID(hProfile); cmsSEQ* Seq = cmsAllocProfileSequenceDescription(ContextID, 1); if (Seq == NULL) return FALSE; Seq->seq[0].deviceMfg = (cmsSignature) 0; Seq->seq[0].deviceModel = (cmsSignature) 0; #ifdef CMS_DONT_USE_INT64 Seq->seq[0].attributes[0] = 0; Seq->seq[0].attributes[1] = 0; #else Seq->seq[0].attributes = 0; #endif Seq->seq[0].technology = (cmsTechnologySignature) 0; cmsMLUsetASCII( Seq->seq[0].Manufacturer, cmsNoLanguage, cmsNoCountry, "Little CMS"); cmsMLUsetASCII( Seq->seq[0].Model, cmsNoLanguage, cmsNoCountry, Model); if (!_cmsWriteProfileSequence(hProfile, Seq)) goto Error; rc = TRUE; Error: if (Seq) cmsFreeProfileSequenceDescription(Seq); return rc; } // This function creates a profile based on White point, primaries and // transfer functions. cmsHPROFILE CMSEXPORT cmsCreateRGBProfileTHR(cmsContext ContextID, const cmsCIExyY* WhitePoint, const cmsCIExyYTRIPLE* Primaries, cmsToneCurve* const TransferFunction[3]) { cmsHPROFILE hICC; cmsMAT3 MColorants; cmsCIEXYZTRIPLE Colorants; cmsCIExyY MaxWhite; cmsMAT3 CHAD; cmsCIEXYZ WhitePointXYZ; hICC = cmsCreateProfilePlaceholder(ContextID); if (!hICC) // can't allocate return NULL; cmsSetProfileVersion(hICC, 4.3); cmsSetDeviceClass(hICC, cmsSigDisplayClass); cmsSetColorSpace(hICC, cmsSigRgbData); cmsSetPCS(hICC, cmsSigXYZData); cmsSetHeaderRenderingIntent(hICC, INTENT_PERCEPTUAL); // Implement profile using following tags: // // 1 cmsSigProfileDescriptionTag // 2 cmsSigMediaWhitePointTag // 3 cmsSigRedColorantTag // 4 cmsSigGreenColorantTag // 5 cmsSigBlueColorantTag // 6 cmsSigRedTRCTag // 7 cmsSigGreenTRCTag // 8 cmsSigBlueTRCTag // 9 Chromatic adaptation Tag // This conforms a standard RGB DisplayProfile as says ICC, and then I add (As per addendum II) // 10 cmsSigChromaticityTag if (!SetTextTags(hICC, L"RGB built-in")) goto Error; if (WhitePoint) { if (!cmsWriteTag(hICC, cmsSigMediaWhitePointTag, cmsD50_XYZ())) goto Error; cmsxyY2XYZ(&WhitePointXYZ, WhitePoint); _cmsAdaptationMatrix(&CHAD, NULL, &WhitePointXYZ, cmsD50_XYZ()); // This is a V4 tag, but many CMM does read and understand it no matter which version if (!cmsWriteTag(hICC, cmsSigChromaticAdaptationTag, (void*) &CHAD)) goto Error; } if (WhitePoint && Primaries) { MaxWhite.x = WhitePoint -> x; MaxWhite.y = WhitePoint -> y; MaxWhite.Y = 1.0; if (!_cmsBuildRGB2XYZtransferMatrix(&MColorants, &MaxWhite, Primaries)) goto Error; Colorants.Red.X = MColorants.v[0].n[0]; Colorants.Red.Y = MColorants.v[1].n[0]; Colorants.Red.Z = MColorants.v[2].n[0]; Colorants.Green.X = MColorants.v[0].n[1]; Colorants.Green.Y = MColorants.v[1].n[1]; Colorants.Green.Z = MColorants.v[2].n[1]; Colorants.Blue.X = MColorants.v[0].n[2]; Colorants.Blue.Y = MColorants.v[1].n[2]; Colorants.Blue.Z = MColorants.v[2].n[2]; if (!cmsWriteTag(hICC, cmsSigRedColorantTag, (void*) &Colorants.Red)) goto Error; if (!cmsWriteTag(hICC, cmsSigBlueColorantTag, (void*) &Colorants.Blue)) goto Error; if (!cmsWriteTag(hICC, cmsSigGreenColorantTag, (void*) &Colorants.Green)) goto Error; } if (TransferFunction) { // Tries to minimize space. Thanks to Richard Hughes for this nice idea if (!cmsWriteTag(hICC, cmsSigRedTRCTag, (void*) TransferFunction[0])) goto Error; if (TransferFunction[1] == TransferFunction[0]) { if (!cmsLinkTag (hICC, cmsSigGreenTRCTag, cmsSigRedTRCTag)) goto Error; } else { if (!cmsWriteTag(hICC, cmsSigGreenTRCTag, (void*) TransferFunction[1])) goto Error; } if (TransferFunction[2] == TransferFunction[0]) { if (!cmsLinkTag (hICC, cmsSigBlueTRCTag, cmsSigRedTRCTag)) goto Error; } else { if (!cmsWriteTag(hICC, cmsSigBlueTRCTag, (void*) TransferFunction[2])) goto Error; } } if (Primaries) { if (!cmsWriteTag(hICC, cmsSigChromaticityTag, (void*) Primaries)) goto Error; } return hICC; Error: if (hICC) cmsCloseProfile(hICC); return NULL; } cmsHPROFILE CMSEXPORT cmsCreateRGBProfile(const cmsCIExyY* WhitePoint, const cmsCIExyYTRIPLE* Primaries, cmsToneCurve* const TransferFunction[3]) { return cmsCreateRGBProfileTHR(NULL, WhitePoint, Primaries, TransferFunction); } // This function creates a profile based on White point and transfer function. cmsHPROFILE CMSEXPORT cmsCreateGrayProfileTHR(cmsContext ContextID, const cmsCIExyY* WhitePoint, const cmsToneCurve* TransferFunction) { cmsHPROFILE hICC; cmsCIEXYZ tmp; hICC = cmsCreateProfilePlaceholder(ContextID); if (!hICC) // can't allocate return NULL; cmsSetProfileVersion(hICC, 4.3); cmsSetDeviceClass(hICC, cmsSigDisplayClass); cmsSetColorSpace(hICC, cmsSigGrayData); cmsSetPCS(hICC, cmsSigXYZData); cmsSetHeaderRenderingIntent(hICC, INTENT_PERCEPTUAL); // Implement profile using following tags: // // 1 cmsSigProfileDescriptionTag // 2 cmsSigMediaWhitePointTag // 3 cmsSigGrayTRCTag // This conforms a standard Gray DisplayProfile // Fill-in the tags if (!SetTextTags(hICC, L"gray built-in")) goto Error; if (WhitePoint) { cmsxyY2XYZ(&tmp, WhitePoint); if (!cmsWriteTag(hICC, cmsSigMediaWhitePointTag, (void*) &tmp)) goto Error; } if (TransferFunction) { if (!cmsWriteTag(hICC, cmsSigGrayTRCTag, (void*) TransferFunction)) goto Error; } return hICC; Error: if (hICC) cmsCloseProfile(hICC); return NULL; } cmsHPROFILE CMSEXPORT cmsCreateGrayProfile(const cmsCIExyY* WhitePoint, const cmsToneCurve* TransferFunction) { return cmsCreateGrayProfileTHR(NULL, WhitePoint, TransferFunction); } // This is a devicelink operating in the target colorspace with as many transfer functions as components cmsHPROFILE CMSEXPORT cmsCreateLinearizationDeviceLinkTHR(cmsContext ContextID, cmsColorSpaceSignature ColorSpace, cmsToneCurve* const TransferFunctions[]) { cmsHPROFILE hICC; cmsPipeline* Pipeline; int nChannels; hICC = cmsCreateProfilePlaceholder(ContextID); if (!hICC) return NULL; cmsSetProfileVersion(hICC, 4.3); cmsSetDeviceClass(hICC, cmsSigLinkClass); cmsSetColorSpace(hICC, ColorSpace); cmsSetPCS(hICC, ColorSpace); cmsSetHeaderRenderingIntent(hICC, INTENT_PERCEPTUAL); // Set up channels nChannels = cmsChannelsOf(ColorSpace); // Creates a Pipeline with prelinearization step only Pipeline = cmsPipelineAlloc(ContextID, nChannels, nChannels); if (Pipeline == NULL) goto Error; // Copy tables to Pipeline if (!cmsPipelineInsertStage(Pipeline, cmsAT_BEGIN, cmsStageAllocToneCurves(ContextID, nChannels, TransferFunctions))) goto Error; // Create tags if (!SetTextTags(hICC, L"Linearization built-in")) goto Error; if (!cmsWriteTag(hICC, cmsSigAToB0Tag, (void*) Pipeline)) goto Error; if (!SetSeqDescTag(hICC, "Linearization built-in")) goto Error; // Pipeline is already on virtual profile cmsPipelineFree(Pipeline); // Ok, done return hICC; Error: cmsPipelineFree(Pipeline); if (hICC) cmsCloseProfile(hICC); return NULL; } cmsHPROFILE CMSEXPORT cmsCreateLinearizationDeviceLink(cmsColorSpaceSignature ColorSpace, cmsToneCurve* const TransferFunctions[]) { return cmsCreateLinearizationDeviceLinkTHR(NULL, ColorSpace, TransferFunctions); } // Ink-limiting algorithm // // Sum = C + M + Y + K // If Sum > InkLimit // Ratio= 1 - (Sum - InkLimit) / (C + M + Y) // if Ratio <0 // Ratio=0 // endif // Else // Ratio=1 // endif // // C = Ratio * C // M = Ratio * M // Y = Ratio * Y // K: Does not change static int InkLimitingSampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo) { cmsFloat64Number InkLimit = *(cmsFloat64Number *) Cargo; cmsFloat64Number SumCMY, SumCMYK, Ratio; InkLimit = (InkLimit * 655.35); SumCMY = In[0] + In[1] + In[2]; SumCMYK = SumCMY + In[3]; if (SumCMYK > InkLimit) { Ratio = 1 - ((SumCMYK - InkLimit) / SumCMY); if (Ratio < 0) Ratio = 0; } else Ratio = 1; Out[0] = _cmsQuickSaturateWord(In[0] * Ratio); // C Out[1] = _cmsQuickSaturateWord(In[1] * Ratio); // M Out[2] = _cmsQuickSaturateWord(In[2] * Ratio); // Y Out[3] = In[3]; // K (untouched) return TRUE; } // This is a devicelink operating in CMYK for ink-limiting 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; } cmsHPROFILE CMSEXPORT cmsCreateInkLimitingDeviceLink(cmsColorSpaceSignature ColorSpace, cmsFloat64Number Limit) { return cmsCreateInkLimitingDeviceLinkTHR(NULL, ColorSpace, Limit); } // Creates a fake Lab identity. cmsHPROFILE CMSEXPORT cmsCreateLab2ProfileTHR(cmsContext ContextID, const cmsCIExyY* WhitePoint) { cmsHPROFILE hProfile; cmsPipeline* LUT = NULL; hProfile = cmsCreateRGBProfileTHR(ContextID, WhitePoint == NULL ? cmsD50_xyY() : WhitePoint, NULL, NULL); if (hProfile == NULL) return NULL; cmsSetProfileVersion(hProfile, 2.1); cmsSetDeviceClass(hProfile, cmsSigAbstractClass); cmsSetColorSpace(hProfile, cmsSigLabData); cmsSetPCS(hProfile, cmsSigLabData); if (!SetTextTags(hProfile, L"Lab identity built-in")) return NULL; // An identity LUT is all we need LUT = cmsPipelineAlloc(ContextID, 3, 3); if (LUT == NULL) goto Error; if (!cmsPipelineInsertStage(LUT, cmsAT_BEGIN, _cmsStageAllocIdentityCLut(ContextID, 3))) goto Error; if (!cmsWriteTag(hProfile, cmsSigAToB0Tag, LUT)) goto Error; cmsPipelineFree(LUT); return hProfile; Error: if (LUT != NULL) cmsPipelineFree(LUT); if (hProfile != NULL) cmsCloseProfile(hProfile); return NULL; } cmsHPROFILE CMSEXPORT cmsCreateLab2Profile(const cmsCIExyY* WhitePoint) { return cmsCreateLab2ProfileTHR(NULL, WhitePoint); } // Creates a fake Lab V4 identity. cmsHPROFILE CMSEXPORT cmsCreateLab4ProfileTHR(cmsContext ContextID, const cmsCIExyY* WhitePoint) { cmsHPROFILE hProfile; cmsPipeline* LUT = NULL; hProfile = cmsCreateRGBProfileTHR(ContextID, WhitePoint == NULL ? cmsD50_xyY() : WhitePoint, NULL, NULL); if (hProfile == NULL) return NULL; cmsSetProfileVersion(hProfile, 4.3); cmsSetDeviceClass(hProfile, cmsSigAbstractClass); cmsSetColorSpace(hProfile, cmsSigLabData); cmsSetPCS(hProfile, cmsSigLabData); if (!SetTextTags(hProfile, L"Lab identity built-in")) goto Error; // An empty LUTs is all we need LUT = cmsPipelineAlloc(ContextID, 3, 3); if (LUT == NULL) goto Error; if (!cmsPipelineInsertStage(LUT, cmsAT_BEGIN, _cmsStageAllocIdentityCurves(ContextID, 3))) goto Error; if (!cmsWriteTag(hProfile, cmsSigAToB0Tag, LUT)) goto Error; cmsPipelineFree(LUT); return hProfile; Error: if (LUT != NULL) cmsPipelineFree(LUT); if (hProfile != NULL) cmsCloseProfile(hProfile); return NULL; } cmsHPROFILE CMSEXPORT cmsCreateLab4Profile(const cmsCIExyY* WhitePoint) { return cmsCreateLab4ProfileTHR(NULL, WhitePoint); } // Creates a fake XYZ identity cmsHPROFILE CMSEXPORT cmsCreateXYZProfileTHR(cmsContext ContextID) { cmsHPROFILE hProfile; cmsPipeline* LUT = NULL; hProfile = cmsCreateRGBProfileTHR(ContextID, cmsD50_xyY(), NULL, NULL); if (hProfile == NULL) return NULL; cmsSetProfileVersion(hProfile, 4.3); cmsSetDeviceClass(hProfile, cmsSigAbstractClass); cmsSetColorSpace(hProfile, cmsSigXYZData); cmsSetPCS(hProfile, cmsSigXYZData); if (!SetTextTags(hProfile, L"XYZ identity built-in")) goto Error; // An identity LUT is all we need LUT = cmsPipelineAlloc(ContextID, 3, 3); if (LUT == NULL) goto Error; if (!cmsPipelineInsertStage(LUT, cmsAT_BEGIN, _cmsStageAllocIdentityCurves(ContextID, 3))) goto Error; if (!cmsWriteTag(hProfile, cmsSigAToB0Tag, LUT)) goto Error; cmsPipelineFree(LUT); return hProfile; Error: if (LUT != NULL) cmsPipelineFree(LUT); if (hProfile != NULL) cmsCloseProfile(hProfile); return NULL; } cmsHPROFILE CMSEXPORT cmsCreateXYZProfile(void) { return cmsCreateXYZProfileTHR(NULL); } //sRGB Curves are defined by: // //If R’sRGB,G’sRGB, B’sRGB < 0.04045 // // R = R’sRGB / 12.92 // G = G’sRGB / 12.92 // B = B’sRGB / 12.92 // // //else if R’sRGB,G’sRGB, B’sRGB >= 0.04045 // // R = ((R’sRGB + 0.055) / 1.055)^2.4 // G = ((G’sRGB + 0.055) / 1.055)^2.4 // B = ((B’sRGB + 0.055) / 1.055)^2.4 static cmsToneCurve* Build_sRGBGamma(cmsContext ContextID) { cmsFloat64Number Parameters[5]; Parameters[0] = 2.4; Parameters[1] = 1. / 1.055; Parameters[2] = 0.055 / 1.055; Parameters[3] = 1. / 12.92; Parameters[4] = 0.04045; return cmsBuildParametricToneCurve(ContextID, 4, Parameters); } // Create the ICC virtual profile for sRGB space cmsHPROFILE CMSEXPORT cmsCreate_sRGBProfileTHR(cmsContext ContextID) { cmsCIExyY D65 = { 0.3127, 0.3290, 1.0 }; cmsCIExyYTRIPLE Rec709Primaries = { {0.6400, 0.3300, 1.0}, {0.3000, 0.6000, 1.0}, {0.1500, 0.0600, 1.0} }; cmsToneCurve* Gamma22[3]; cmsHPROFILE hsRGB; // cmsWhitePointFromTemp(&D65, 6504); Gamma22[0] = Gamma22[1] = Gamma22[2] = Build_sRGBGamma(ContextID); if (Gamma22[0] == NULL) return NULL; hsRGB = cmsCreateRGBProfileTHR(ContextID, &D65, &Rec709Primaries, Gamma22); cmsFreeToneCurve(Gamma22[0]); if (hsRGB == NULL) return NULL; if (!SetTextTags(hsRGB, L"sRGB built-in")) { cmsCloseProfile(hsRGB); return NULL; } return hsRGB; } cmsHPROFILE CMSEXPORT cmsCreate_sRGBProfile(void) { return cmsCreate_sRGBProfileTHR(NULL); } typedef struct { cmsFloat64Number Brightness; cmsFloat64Number Contrast; cmsFloat64Number Hue; cmsFloat64Number Saturation; cmsBool lAdjustWP; cmsCIEXYZ WPsrc, WPdest; } BCHSWADJUSTS, *LPBCHSWADJUSTS; static int bchswSampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo) { cmsCIELab LabIn, LabOut; cmsCIELCh LChIn, LChOut; cmsCIEXYZ XYZ; LPBCHSWADJUSTS bchsw = (LPBCHSWADJUSTS) Cargo; cmsLabEncoded2Float(&LabIn, In); cmsLab2LCh(&LChIn, &LabIn); // Do some adjusts on LCh LChOut.L = LChIn.L * bchsw ->Contrast + bchsw ->Brightness; LChOut.C = LChIn.C + bchsw -> Saturation; LChOut.h = LChIn.h + bchsw -> Hue; cmsLCh2Lab(&LabOut, &LChOut); // Move white point in Lab if (bchsw->lAdjustWP) { cmsLab2XYZ(&bchsw->WPsrc, &XYZ, &LabOut); cmsXYZ2Lab(&bchsw->WPdest, &LabOut, &XYZ); } // Back to encoded cmsFloat2LabEncoded(Out, &LabOut); return TRUE; } // Creates an abstract profile operating in Lab space for Brightness, // contrast, Saturation and white point displacement cmsHPROFILE CMSEXPORT cmsCreateBCHSWabstractProfileTHR(cmsContext ContextID, int nLUTPoints, cmsFloat64Number Bright, cmsFloat64Number Contrast, cmsFloat64Number Hue, cmsFloat64Number Saturation, int TempSrc, int TempDest) { cmsHPROFILE hICC; cmsPipeline* Pipeline; BCHSWADJUSTS bchsw; cmsCIExyY WhitePnt; cmsStage* CLUT; cmsUInt32Number Dimensions[MAX_INPUT_DIMENSIONS]; int i; bchsw.Brightness = Bright; bchsw.Contrast = Contrast; bchsw.Hue = Hue; bchsw.Saturation = Saturation; if (TempSrc == TempDest) { bchsw.lAdjustWP = FALSE; } else { bchsw.lAdjustWP = TRUE; cmsWhitePointFromTemp(&WhitePnt, TempSrc); cmsxyY2XYZ(&bchsw.WPsrc, &WhitePnt); cmsWhitePointFromTemp(&WhitePnt, TempDest); cmsxyY2XYZ(&bchsw.WPdest, &WhitePnt); } hICC = cmsCreateProfilePlaceholder(ContextID); if (!hICC) // can't allocate return NULL; cmsSetDeviceClass(hICC, cmsSigAbstractClass); cmsSetColorSpace(hICC, cmsSigLabData); cmsSetPCS(hICC, cmsSigLabData); cmsSetHeaderRenderingIntent(hICC, INTENT_PERCEPTUAL); // Creates a Pipeline with 3D grid only Pipeline = cmsPipelineAlloc(ContextID, 3, 3); if (Pipeline == NULL) { cmsCloseProfile(hICC); return NULL; } for (i=0; i < MAX_INPUT_DIMENSIONS; i++) Dimensions[i] = nLUTPoints; CLUT = cmsStageAllocCLut16bitGranular(ContextID, Dimensions, 3, 3, NULL); if (CLUT == NULL) return NULL; if (!cmsStageSampleCLut16bit(CLUT, bchswSampler, (void*) &bchsw, 0)) { // Shouldn't reach here goto Error; } if (!cmsPipelineInsertStage(Pipeline, cmsAT_END, CLUT)) { goto Error; } // Create tags if (!SetTextTags(hICC, L"BCHS built-in")) return NULL; cmsWriteTag(hICC, cmsSigMediaWhitePointTag, (void*) cmsD50_XYZ()); cmsWriteTag(hICC, cmsSigAToB0Tag, (void*) Pipeline); // Pipeline is already on virtual profile cmsPipelineFree(Pipeline); // Ok, done return hICC; Error: cmsPipelineFree(Pipeline); cmsCloseProfile(hICC); return NULL; } CMSAPI cmsHPROFILE CMSEXPORT cmsCreateBCHSWabstractProfile(int nLUTPoints, cmsFloat64Number Bright, cmsFloat64Number Contrast, cmsFloat64Number Hue, cmsFloat64Number Saturation, int TempSrc, int TempDest) { return cmsCreateBCHSWabstractProfileTHR(NULL, nLUTPoints, Bright, Contrast, Hue, Saturation, TempSrc, TempDest); } // 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; } cmsHPROFILE CMSEXPORT cmsCreateNULLProfile(void) { return cmsCreateNULLProfileTHR(NULL); } static int IsPCS(cmsColorSpaceSignature ColorSpace) { return (ColorSpace == cmsSigXYZData || ColorSpace == cmsSigLabData); } static void FixColorSpaces(cmsHPROFILE hProfile, cmsColorSpaceSignature ColorSpace, cmsColorSpaceSignature PCS, cmsUInt32Number dwFlags) { if (dwFlags & cmsFLAGS_GUESSDEVICECLASS) { if (IsPCS(ColorSpace) && IsPCS(PCS)) { cmsSetDeviceClass(hProfile, cmsSigAbstractClass); cmsSetColorSpace(hProfile, ColorSpace); cmsSetPCS(hProfile, PCS); return; } if (IsPCS(ColorSpace) && !IsPCS(PCS)) { cmsSetDeviceClass(hProfile, cmsSigOutputClass); cmsSetPCS(hProfile, ColorSpace); cmsSetColorSpace(hProfile, PCS); return; } if (IsPCS(PCS) && !IsPCS(ColorSpace)) { cmsSetDeviceClass(hProfile, cmsSigInputClass); cmsSetColorSpace(hProfile, ColorSpace); cmsSetPCS(hProfile, PCS); return; } } cmsSetDeviceClass(hProfile, cmsSigLinkClass); cmsSetColorSpace(hProfile, ColorSpace); cmsSetPCS(hProfile, PCS); } // This function creates a named color profile dumping all the contents of transform to a single profile // In this way, LittleCMS may be used to "group" several named color databases into a single profile. // It has, however, several minor limitations. PCS is always Lab, which is not very critic since this // is the normal PCS for named color profiles. static cmsHPROFILE CreateNamedColorDevicelink(cmsHTRANSFORM xform) { _cmsTRANSFORM* v = (_cmsTRANSFORM*) xform; cmsHPROFILE hICC = NULL; int i, nColors; cmsNAMEDCOLORLIST *nc2 = NULL, *Original = NULL; // Create an empty placeholder hICC = cmsCreateProfilePlaceholder(v->ContextID); if (hICC == NULL) return NULL; // Critical information cmsSetDeviceClass(hICC, cmsSigNamedColorClass); cmsSetColorSpace(hICC, v ->ExitColorSpace); cmsSetPCS(hICC, cmsSigLabData); // Tag profile with information if (!SetTextTags(hICC, L"Named color devicelink")) goto Error; Original = cmsGetNamedColorList(xform); if (Original == NULL) goto Error; nColors = cmsNamedColorCount(Original); nc2 = cmsDupNamedColorList(Original); if (nc2 == NULL) goto Error; // Colorant count now depends on the output space nc2 ->ColorantCount = cmsPipelineOutputChannels(v ->Lut); // Make sure we have proper formatters cmsChangeBuffersFormat(xform, TYPE_NAMED_COLOR_INDEX, FLOAT_SH(0) | COLORSPACE_SH(_cmsLCMScolorSpace(v ->ExitColorSpace)) | BYTES_SH(2) | CHANNELS_SH(cmsChannelsOf(v ->ExitColorSpace))); // Apply the transfor to colorants. for (i=0; i < nColors; i++) { cmsDoTransform(xform, &i, nc2 ->List[i].DeviceColorant, 1); } if (!cmsWriteTag(hICC, cmsSigNamedColor2Tag, (void*) nc2)) goto Error; cmsFreeNamedColorList(nc2); return hICC; Error: if (hICC != NULL) cmsCloseProfile(hICC); return NULL; } // This structure holds information about which MPU can be stored on a profile based on the version typedef struct { cmsBool IsV4; // Is a V4 tag? cmsTagSignature RequiredTag; // Set to 0 for both types cmsTagTypeSignature LutType; // The LUT type int nTypes; // Number of types (up to 5) cmsStageSignature MpeTypes[5]; // 5 is the maximum number } cmsAllowedLUT; #define cmsSig0 ((cmsTagSignature) 0) static const cmsAllowedLUT AllowedLUTTypes[] = { { FALSE, cmsSig0, cmsSigLut16Type, 4, { cmsSigMatrixElemType, cmsSigCurveSetElemType, cmsSigCLutElemType, cmsSigCurveSetElemType } }, { FALSE, cmsSig0, cmsSigLut16Type, 3, { cmsSigCurveSetElemType, cmsSigCLutElemType, cmsSigCurveSetElemType } }, { FALSE, cmsSig0, cmsSigLut16Type, 2, { cmsSigCurveSetElemType, cmsSigCLutElemType } }, { TRUE, cmsSig0, cmsSigLutAtoBType, 1, { cmsSigCurveSetElemType } }, { TRUE , cmsSigAToB0Tag, cmsSigLutAtoBType, 3, { cmsSigCurveSetElemType, cmsSigMatrixElemType, cmsSigCurveSetElemType } }, { TRUE , cmsSigAToB0Tag, cmsSigLutAtoBType, 3, { cmsSigCurveSetElemType, cmsSigCLutElemType, cmsSigCurveSetElemType } }, { TRUE , cmsSigAToB0Tag, cmsSigLutAtoBType, 5, { cmsSigCurveSetElemType, cmsSigCLutElemType, cmsSigCurveSetElemType, cmsSigMatrixElemType, cmsSigCurveSetElemType }}, { TRUE , cmsSigBToA0Tag, cmsSigLutBtoAType, 1, { cmsSigCurveSetElemType }}, { TRUE , cmsSigBToA0Tag, cmsSigLutBtoAType, 3, { cmsSigCurveSetElemType, cmsSigMatrixElemType, cmsSigCurveSetElemType }}, { TRUE , cmsSigBToA0Tag, cmsSigLutBtoAType, 3, { cmsSigCurveSetElemType, cmsSigCLutElemType, cmsSigCurveSetElemType }}, { TRUE , cmsSigBToA0Tag, cmsSigLutBtoAType, 5, { cmsSigCurveSetElemType, cmsSigMatrixElemType, cmsSigCurveSetElemType, cmsSigCLutElemType, cmsSigCurveSetElemType }} }; #define SIZE_OF_ALLOWED_LUT (sizeof(AllowedLUTTypes)/sizeof(cmsAllowedLUT)) // Check a single entry static cmsBool CheckOne(const cmsAllowedLUT* Tab, const cmsPipeline* Lut) { cmsStage* mpe; int n; for (n=0, mpe = Lut ->Elements; mpe != NULL; mpe = mpe ->Next, n++) { if (n > Tab ->nTypes) return FALSE; if (cmsStageType(mpe) != Tab ->MpeTypes[n]) return FALSE; } return (n == Tab ->nTypes); } static const cmsAllowedLUT* FindCombination(const cmsPipeline* Lut, cmsBool IsV4, cmsTagSignature DestinationTag) { cmsUInt32Number n; for (n=0; n < SIZE_OF_ALLOWED_LUT; n++) { const cmsAllowedLUT* Tab = AllowedLUTTypes + n; if (IsV4 ^ Tab -> IsV4) continue; if ((Tab ->RequiredTag != 0) && (Tab ->RequiredTag != DestinationTag)) continue; if (CheckOne(Tab, Lut)) return Tab; } return NULL; } // Does convert a transform into a device link profile cmsHPROFILE CMSEXPORT cmsTransform2DeviceLink(cmsHTRANSFORM hTransform, cmsFloat64Number Version, cmsUInt32Number dwFlags) { cmsHPROFILE hProfile = NULL; cmsUInt32Number FrmIn, FrmOut, ChansIn, ChansOut; cmsUInt32Number ColorSpaceBitsIn, ColorSpaceBitsOut; _cmsTRANSFORM* xform = (_cmsTRANSFORM*) hTransform; cmsPipeline* LUT = NULL; cmsStage* mpe; cmsContext ContextID = cmsGetTransformContextID(hTransform); const cmsAllowedLUT* AllowedLUT; cmsTagSignature DestinationTag; cmsProfileClassSignature deviceClass; _cmsAssert(hTransform != NULL); // Get the first mpe to check for named color mpe = cmsPipelineGetPtrToFirstStage(xform ->Lut); // Check if is a named color transform if (mpe != NULL) { if (cmsStageType(mpe) == cmsSigNamedColorElemType) { return CreateNamedColorDevicelink(hTransform); } } // First thing to do is to get a copy of the transformation LUT = cmsPipelineDup(xform ->Lut); if (LUT == NULL) return NULL; // Time to fix the Lab2/Lab4 issue. if ((xform ->EntryColorSpace == cmsSigLabData) && (Version < 4.0)) { if (!cmsPipelineInsertStage(LUT, cmsAT_BEGIN, _cmsStageAllocLabV2ToV4curves(ContextID))) goto Error; } // On the output side too if ((xform ->ExitColorSpace) == cmsSigLabData && (Version < 4.0)) { if (!cmsPipelineInsertStage(LUT, cmsAT_END, _cmsStageAllocLabV4ToV2(ContextID))) goto Error; } hProfile = cmsCreateProfilePlaceholder(ContextID); if (!hProfile) goto Error; // can't allocate cmsSetProfileVersion(hProfile, Version); FixColorSpaces(hProfile, xform -> EntryColorSpace, xform -> ExitColorSpace, dwFlags); // Optimize the LUT and precalculate a devicelink ChansIn = cmsChannelsOf(xform -> EntryColorSpace); ChansOut = cmsChannelsOf(xform -> ExitColorSpace); ColorSpaceBitsIn = _cmsLCMScolorSpace(xform -> EntryColorSpace); ColorSpaceBitsOut = _cmsLCMScolorSpace(xform -> ExitColorSpace); FrmIn = COLORSPACE_SH(ColorSpaceBitsIn) | CHANNELS_SH(ChansIn)|BYTES_SH(2); FrmOut = COLORSPACE_SH(ColorSpaceBitsOut) | CHANNELS_SH(ChansOut)|BYTES_SH(2); deviceClass = cmsGetDeviceClass(hProfile); if (deviceClass == cmsSigOutputClass) DestinationTag = cmsSigBToA0Tag; else DestinationTag = cmsSigAToB0Tag; // Check if the profile/version can store the result if (dwFlags & cmsFLAGS_FORCE_CLUT) AllowedLUT = NULL; else AllowedLUT = FindCombination(LUT, Version >= 4.0, DestinationTag); if (AllowedLUT == NULL) { // Try to optimize _cmsOptimizePipeline(ContextID, &LUT, xform ->RenderingIntent, &FrmIn, &FrmOut, &dwFlags); AllowedLUT = FindCombination(LUT, Version >= 4.0, DestinationTag); } // If no way, then force CLUT that for sure can be written if (AllowedLUT == NULL) { cmsStage* FirstStage; cmsStage* LastStage; dwFlags |= cmsFLAGS_FORCE_CLUT; _cmsOptimizePipeline(ContextID, &LUT, xform ->RenderingIntent, &FrmIn, &FrmOut, &dwFlags); // Put identity curves if needed FirstStage = cmsPipelineGetPtrToFirstStage(LUT); if (FirstStage != NULL && FirstStage ->Type != cmsSigCurveSetElemType) if (!cmsPipelineInsertStage(LUT, cmsAT_BEGIN, _cmsStageAllocIdentityCurves(ContextID, ChansIn))) goto Error; LastStage = cmsPipelineGetPtrToLastStage(LUT); if (LastStage != NULL && LastStage ->Type != cmsSigCurveSetElemType) if (!cmsPipelineInsertStage(LUT, cmsAT_END, _cmsStageAllocIdentityCurves(ContextID, ChansOut))) goto Error; AllowedLUT = FindCombination(LUT, Version >= 4.0, DestinationTag); } // Somethings is wrong... if (AllowedLUT == NULL) { goto Error; } if (dwFlags & cmsFLAGS_8BITS_DEVICELINK) cmsPipelineSetSaveAs8bitsFlag(LUT, TRUE); // Tag profile with information if (!SetTextTags(hProfile, L"devicelink")) goto Error; // Store result if (!cmsWriteTag(hProfile, DestinationTag, LUT)) goto Error; if (xform -> InputColorant != NULL) { if (!cmsWriteTag(hProfile, cmsSigColorantTableTag, xform->InputColorant)) goto Error; } if (xform -> OutputColorant != NULL) { if (!cmsWriteTag(hProfile, cmsSigColorantTableOutTag, xform->OutputColorant)) goto Error; } if ((deviceClass == cmsSigLinkClass) && (xform ->Sequence != NULL)) { if (!_cmsWriteProfileSequence(hProfile, xform ->Sequence)) goto Error; } // Set the white point if (deviceClass == cmsSigInputClass) { if (!cmsWriteTag(hProfile, cmsSigMediaWhitePointTag, &xform ->EntryWhitePoint)) goto Error; } else { if (!cmsWriteTag(hProfile, cmsSigMediaWhitePointTag, &xform ->ExitWhitePoint)) goto Error; } // Per 7.2.15 in spec 4.3 cmsSetHeaderRenderingIntent(hProfile, xform ->RenderingIntent); cmsPipelineFree(LUT); return hProfile; Error: if (LUT != NULL) cmsPipelineFree(LUT); cmsCloseProfile(hProfile); return NULL; }