diff options
Diffstat (limited to 'src/cmsio1.c')
| -rw-r--r-- | src/cmsio1.c | 101 |
1 files changed, 95 insertions, 6 deletions
diff --git a/src/cmsio1.c b/src/cmsio1.c index ea92567..0787503 100644 --- a/src/cmsio1.c +++ b/src/cmsio1.c @@ -237,6 +237,34 @@ cmsPipeline* BuildRGBInputMatrixShaper(cmsHPROFILE hProfile) return Lut; } + + +// Read the DToAX tag, adjusting the encoding of Lab or XYZ if neded +static +cmsPipeline* _cmsReadFloatInputTag(cmsHPROFILE hProfile, cmsTagSignature tagFloat) +{ + cmsContext ContextID = cmsGetProfileContextID(hProfile); + cmsPipeline* Lut = cmsPipelineDup((cmsPipeline*) cmsReadTag(hProfile, tagFloat)); + cmsColorSpaceSignature spc = cmsGetColorSpace(hProfile); + + if (Lut == NULL) return NULL; + + // If PCS is Lab or XYZ, the floating point tag is accepting data in the space encoding, + // and since the formatter has already accomodated to 0..1.0, we should undo this change + if ( spc == cmsSigLabData) + { + cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromLabFloat(ContextID)); + } + else + if (spc == cmsSigXYZData) + { + cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromXyzFloat(ContextID)); + } + + return Lut; +} + + // 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 cmsPipeline* _cmsReadInputLUT(cmsHPROFILE hProfile, int Intent) @@ -267,8 +295,9 @@ cmsPipeline* _cmsReadInputLUT(cmsHPROFILE hProfile, int Intent) if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence - // Floating point LUT are always V4, so no adjustment is required - return cmsPipelineDup((cmsPipeline*) cmsReadTag(hProfile, tagFloat)); + // 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 @@ -430,6 +459,32 @@ void ChangeInterpolationToTrilinear(cmsPipeline* Lut) } } + +// Read the DToAX tag, adjusting the encoding of Lab or XYZ if neded +static +cmsPipeline* _cmsReadFloatOutputTag(cmsHPROFILE hProfile, cmsTagSignature tagFloat) +{ + cmsContext ContextID = cmsGetProfileContextID(hProfile); + cmsPipeline* Lut = cmsPipelineDup((cmsPipeline*) cmsReadTag(hProfile, tagFloat)); + cmsColorSpaceSignature PCS = cmsGetPCS(hProfile); + + if (Lut == NULL) return NULL; + + // If PCS is Lab or XYZ, the floating point tag is accepting data in the space encoding, + // and since the formatter has already accomodated to 0..1.0, we should undo this change + if ( PCS == cmsSigLabData) + { + cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToLabFloat(ContextID)); + } + else + if (PCS == cmsSigXYZData) + { + cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToXyzFloat(ContextID)); + } + + return Lut; +} + // Create an output MPE LUT from agiven profile. Version mismatches are handled here cmsPipeline* _cmsReadOutputLUT(cmsHPROFILE hProfile, int Intent) { @@ -440,8 +495,8 @@ cmsPipeline* _cmsReadOutputLUT(cmsHPROFILE hProfile, int Intent) if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence - // Floating point LUT are always V4, so no adjustment is required - return cmsPipelineDup((cmsPipeline*) cmsReadTag(hProfile, tagFloat)); + // Floating point LUT are always V4 + return _cmsReadFloatOutputTag(hProfile, tagFloat); } // Revert to perceptual if no tag is found @@ -499,6 +554,40 @@ cmsPipeline* _cmsReadOutputLUT(cmsHPROFILE hProfile, int Intent) // --------------------------------------------------------------------------------------------------------------- +// Read the AToD0 tag, adjusting the encoding of Lab or XYZ if neded +static +cmsPipeline* _cmsReadFloatDevicelinkTag(cmsHPROFILE hProfile, cmsTagSignature tagFloat) +{ + cmsContext ContextID = cmsGetProfileContextID(hProfile); + cmsPipeline* Lut = cmsPipelineDup((cmsPipeline*) cmsReadTag(hProfile, tagFloat)); + cmsColorSpaceSignature PCS = cmsGetPCS(hProfile); + cmsColorSpaceSignature spc = cmsGetColorSpace(hProfile); + + if (Lut == NULL) return NULL; + + if (spc == cmsSigLabData) + { + cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToLabFloat(ContextID)); + } + else + if (spc == cmsSigXYZData) + { + cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToXyzFloat(ContextID)); + } + + if (PCS == cmsSigLabData) + { + cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromLabFloat(ContextID)); + } + else + if (PCS == cmsSigXYZData) + { + cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromXyzFloat(ContextID)); + } + + return Lut; +} + // 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) @@ -531,8 +620,8 @@ cmsPipeline* _cmsReadDevicelinkLUT(cmsHPROFILE hProfile, int Intent) if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence - // Floating point LUT are always V4, no adjustment is required - return cmsPipelineDup((cmsPipeline*) cmsReadTag(hProfile, tagFloat)); + // Floating point LUT are always V + return _cmsReadFloatDevicelinkTag(hProfile, tagFloat); } tagFloat = Device2PCSFloat[0]; |