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authorNicolas Pena <npm@chromium.org>2017-08-10 16:36:56 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-08-10 20:54:00 +0000
commitf7520395821090b36a5ad8c658a844c3342dbf66 (patch)
treeabe5505e60a57479593d6c39790fe214c23f9fef /third_party/lcms/src/cmsio1.c
parenta12812924fc844823025fa383cc3ec8c1d1e2d4f (diff)
downloadpdfium-f7520395821090b36a5ad8c658a844c3342dbf66.tar.xz
LCMS: rename folder
Change-Id: I5f240cb0779648dc5427fecb5561086e7c0fb16a Reviewed-on: https://pdfium-review.googlesource.com/10650 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Nicolás Peña <npm@chromium.org>
Diffstat (limited to 'third_party/lcms/src/cmsio1.c')
-rw-r--r--third_party/lcms/src/cmsio1.c1020
1 files changed, 1020 insertions, 0 deletions
diff --git a/third_party/lcms/src/cmsio1.c b/third_party/lcms/src/cmsio1.c
new file mode 100644
index 0000000000..778aa2b4fc
--- /dev/null
+++ b/third_party/lcms/src/cmsio1.c
@@ -0,0 +1,1020 @@
+//---------------------------------------------------------------------------------
+//
+// 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"
+
+// Read tags using low-level functions, provides necessary glue code to adapt versions, etc.
+
+// LUT tags
+static const cmsTagSignature Device2PCS16[] = {cmsSigAToB0Tag, // Perceptual
+ cmsSigAToB1Tag, // Relative colorimetric
+ cmsSigAToB2Tag, // Saturation
+ cmsSigAToB1Tag }; // Absolute colorimetric
+
+static const cmsTagSignature Device2PCSFloat[] = {cmsSigDToB0Tag, // Perceptual
+ cmsSigDToB1Tag, // Relative colorimetric
+ cmsSigDToB2Tag, // Saturation
+ cmsSigDToB3Tag }; // Absolute colorimetric
+
+static const cmsTagSignature PCS2Device16[] = {cmsSigBToA0Tag, // Perceptual
+ cmsSigBToA1Tag, // Relative colorimetric
+ cmsSigBToA2Tag, // Saturation
+ cmsSigBToA1Tag }; // Absolute colorimetric
+
+static const cmsTagSignature PCS2DeviceFloat[] = {cmsSigBToD0Tag, // Perceptual
+ cmsSigBToD1Tag, // Relative colorimetric
+ cmsSigBToD2Tag, // Saturation
+ cmsSigBToD3Tag }; // Absolute colorimetric
+
+
+// Factors to convert from 1.15 fixed point to 0..1.0 range and vice-versa
+#define InpAdj (1.0/MAX_ENCODEABLE_XYZ) // (65536.0/(65535.0*2.0))
+#define OutpAdj (MAX_ENCODEABLE_XYZ) // ((2.0*65535.0)/65536.0)
+
+// Several resources for gray conversions.
+static const cmsFloat64Number GrayInputMatrix[] = { (InpAdj*cmsD50X), (InpAdj*cmsD50Y), (InpAdj*cmsD50Z) };
+static const cmsFloat64Number OneToThreeInputMatrix[] = { 1, 1, 1 };
+static const cmsFloat64Number PickYMatrix[] = { 0, (OutpAdj*cmsD50Y), 0 };
+static const cmsFloat64Number PickLstarMatrix[] = { 1, 0, 0 };
+
+// Get a media white point fixing some issues found in certain old profiles
+cmsBool _cmsReadMediaWhitePoint(cmsCIEXYZ* Dest, cmsHPROFILE hProfile)
+{
+ cmsCIEXYZ* Tag;
+
+ _cmsAssert(Dest != NULL);
+
+ Tag = (cmsCIEXYZ*) cmsReadTag(hProfile, cmsSigMediaWhitePointTag);
+
+ // If no wp, take D50
+ if (Tag == NULL) {
+ *Dest = *cmsD50_XYZ();
+ return TRUE;
+ }
+
+ // V2 display profiles should give D50
+ if (cmsGetEncodedICCversion(hProfile) < 0x4000000) {
+
+ if (cmsGetDeviceClass(hProfile) == cmsSigDisplayClass) {
+ *Dest = *cmsD50_XYZ();
+ return TRUE;
+ }
+ }
+
+ // All seems ok
+ *Dest = *Tag;
+ return TRUE;
+}
+
+
+// Chromatic adaptation matrix. Fix some issues as well
+cmsBool _cmsReadCHAD(cmsMAT3* Dest, cmsHPROFILE hProfile)
+{
+ cmsMAT3* Tag;
+
+ _cmsAssert(Dest != NULL);
+
+ Tag = (cmsMAT3*) cmsReadTag(hProfile, cmsSigChromaticAdaptationTag);
+
+ if (Tag != NULL) {
+ *Dest = *Tag;
+ return TRUE;
+ }
+
+ // No CHAD available, default it to identity
+ _cmsMAT3identity(Dest);
+
+ // V2 display profiles should give D50
+ if (cmsGetEncodedICCversion(hProfile) < 0x4000000) {
+
+ if (cmsGetDeviceClass(hProfile) == cmsSigDisplayClass) {
+
+ cmsCIEXYZ* White = (cmsCIEXYZ*) cmsReadTag(hProfile, cmsSigMediaWhitePointTag);
+
+ if (White == NULL) {
+
+ _cmsMAT3identity(Dest);
+ return TRUE;
+ }
+
+ return _cmsAdaptationMatrix(Dest, NULL, White, cmsD50_XYZ());
+ }
+ }
+
+ return TRUE;
+}
+
+
+// Auxiliar, read colorants as a MAT3 structure. Used by any function that needs a matrix-shaper
+static
+cmsBool ReadICCMatrixRGB2XYZ(cmsMAT3* r, cmsHPROFILE hProfile)
+{
+ cmsCIEXYZ *PtrRed, *PtrGreen, *PtrBlue;
+
+ _cmsAssert(r != NULL);
+
+ PtrRed = (cmsCIEXYZ *) cmsReadTag(hProfile, cmsSigRedColorantTag);
+ PtrGreen = (cmsCIEXYZ *) cmsReadTag(hProfile, cmsSigGreenColorantTag);
+ PtrBlue = (cmsCIEXYZ *) cmsReadTag(hProfile, cmsSigBlueColorantTag);
+
+ if (PtrRed == NULL || PtrGreen == NULL || PtrBlue == NULL)
+ return FALSE;
+
+ _cmsVEC3init(&r -> v[0], PtrRed -> X, PtrGreen -> X, PtrBlue -> X);
+ _cmsVEC3init(&r -> v[1], PtrRed -> Y, PtrGreen -> Y, PtrBlue -> Y);
+ _cmsVEC3init(&r -> v[2], PtrRed -> Z, PtrGreen -> Z, PtrBlue -> Z);
+
+ return TRUE;
+}
+
+
+// Gray input pipeline
+static
+cmsPipeline* BuildGrayInputMatrixPipeline(cmsHPROFILE hProfile)
+{
+ cmsToneCurve *GrayTRC;
+ cmsPipeline* Lut;
+ cmsContext ContextID = cmsGetProfileContextID(hProfile);
+
+ GrayTRC = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGrayTRCTag);
+ if (GrayTRC == NULL) return NULL;
+
+ Lut = cmsPipelineAlloc(ContextID, 1, 3);
+ if (Lut == NULL)
+ goto Error;
+
+ if (cmsGetPCS(hProfile) == cmsSigLabData) {
+
+ // In this case we implement the profile as an identity matrix plus 3 tone curves
+ cmsUInt16Number Zero[2] = { 0x8080, 0x8080 };
+ cmsToneCurve* EmptyTab;
+ cmsToneCurve* LabCurves[3];
+
+ EmptyTab = cmsBuildTabulatedToneCurve16(ContextID, 2, Zero);
+
+ if (EmptyTab == NULL)
+ goto Error;
+
+ LabCurves[0] = GrayTRC;
+ LabCurves[1] = EmptyTab;
+ LabCurves[2] = EmptyTab;
+
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 1, OneToThreeInputMatrix, NULL)) ||
+ !cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 3, LabCurves))) {
+ cmsFreeToneCurve(EmptyTab);
+ goto Error;
+ }
+
+ cmsFreeToneCurve(EmptyTab);
+
+ }
+ else {
+
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 1, &GrayTRC)) ||
+ !cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 1, GrayInputMatrix, NULL)))
+ goto Error;
+ }
+
+ return Lut;
+
+Error:
+ // memory pointed by GrayTRC is not a new malloc memory, so don't free it here,
+ // memory pointed by GrayTRC will be freed when hProfile is closed.
+ // test file :0047776_Pocket Medicine_ The Massachusetts General Hospital Handbook of Internal Medicine-2.pdf
+ // Xiaochuan Liu, 20140421
+ //cmsFreeToneCurve(GrayTRC);
+ cmsPipelineFree(Lut);
+ return NULL;
+}
+
+// RGB Matrix shaper
+static
+cmsPipeline* BuildRGBInputMatrixShaper(cmsHPROFILE hProfile)
+{
+ cmsPipeline* Lut;
+ cmsMAT3 Mat;
+ cmsToneCurve *Shapes[3];
+ cmsContext ContextID = cmsGetProfileContextID(hProfile);
+ int i, j;
+
+ if (!ReadICCMatrixRGB2XYZ(&Mat, hProfile)) return NULL;
+
+ // XYZ PCS in encoded in 1.15 format, and the matrix output comes in 0..0xffff range, so
+ // we need to adjust the output by a factor of (0x10000/0xffff) to put data in
+ // a 1.16 range, and then a >> 1 to obtain 1.15. The total factor is (65536.0)/(65535.0*2)
+
+ for (i=0; i < 3; i++)
+ for (j=0; j < 3; j++)
+ Mat.v[i].n[j] *= InpAdj;
+
+
+ Shapes[0] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigRedTRCTag);
+ Shapes[1] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGreenTRCTag);
+ Shapes[2] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigBlueTRCTag);
+
+ if (!Shapes[0] || !Shapes[1] || !Shapes[2])
+ return NULL;
+
+ Lut = cmsPipelineAlloc(ContextID, 3, 3);
+ if (Lut != NULL) {
+
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 3, Shapes)) ||
+ !cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 3, (cmsFloat64Number*) &Mat, NULL)))
+ goto Error;
+
+ // Note that it is certainly possible a single profile would have a LUT based
+ // tag for output working in lab and a matrix-shaper for the fallback cases.
+ // This is not allowed by the spec, but this code is tolerant to those cases
+ if (cmsGetPCS(hProfile) == cmsSigLabData) {
+
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocXYZ2Lab(ContextID)))
+ goto Error;
+ }
+
+ }
+
+ return Lut;
+
+Error:
+ cmsPipelineFree(Lut);
+ return NULL;
+}
+
+
+
+// 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);
+ cmsColorSpaceSignature PCS = cmsGetPCS(hProfile);
+
+ if (Lut == NULL) return NULL;
+
+ // input and output of transform are in lcms 0..1 encoding. If XYZ or Lab spaces are used,
+ // these need to be normalized into the appropriate ranges (Lab = 100,0,0, XYZ=1.0,1.0,1.0)
+ if ( spc == cmsSigLabData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToLabFloat(ContextID)))
+ goto Error;
+ }
+ else if (spc == cmsSigXYZData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToXyzFloat(ContextID)))
+ goto Error;
+ }
+
+ if ( PCS == cmsSigLabData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromLabFloat(ContextID)))
+ goto Error;
+ }
+ else if( PCS == cmsSigXYZData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromXyzFloat(ContextID)))
+ goto Error;
+ }
+
+ return Lut;
+
+Error:
+ cmsPipelineFree(Lut);
+ return NULL;
+}
+
+
+// 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.
+// We add intent = -1 as a way to read matrix shaper always, no matter of other LUT
+cmsPipeline* _cmsReadInputLUT(cmsHPROFILE hProfile, int Intent)
+{
+ cmsTagTypeSignature OriginalType;
+ cmsTagSignature tag16 = Device2PCS16[Intent];
+ cmsTagSignature tagFloat = Device2PCSFloat[Intent];
+ cmsContext ContextID = cmsGetProfileContextID(hProfile);
+
+ // On named color, take the appropiate tag
+ if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
+
+ cmsPipeline* Lut;
+ cmsNAMEDCOLORLIST* nc = (cmsNAMEDCOLORLIST*) cmsReadTag(hProfile, cmsSigNamedColor2Tag);
+
+ if (nc == NULL) return NULL;
+
+ Lut = cmsPipelineAlloc(ContextID, 0, 0);
+ if (Lut == NULL) {
+ cmsFreeNamedColorList(nc);
+ return NULL;
+ }
+
+ if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocNamedColor(nc, TRUE)) ||
+ !cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID))) {
+ cmsPipelineFree(Lut);
+ return NULL;
+ }
+ return Lut;
+ }
+
+ // This is an attempt to reuse this funtion to retrieve the matrix-shaper as pipeline no
+ // matter other LUT are present and have precedence. Intent = -1 means just this.
+ if (Intent != -1) {
+
+ if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
+
+ // 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
+ if (!cmsIsTag(hProfile, tag16)) {
+ tag16 = Device2PCS16[0];
+ }
+
+ if (cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
+
+ // Check profile version and LUT type. Do the necessary adjustments if needed
+
+ // First read the tag
+ cmsPipeline* Lut = (cmsPipeline*) cmsReadTag(hProfile, tag16);
+ if (Lut == NULL) return NULL;
+
+ // After reading it, we have now info about the original type
+ OriginalType = _cmsGetTagTrueType(hProfile, tag16);
+
+ // The profile owns the Lut, so we need to copy it
+ Lut = cmsPipelineDup(Lut);
+
+ // We need to adjust data only for Lab16 on output
+ if (OriginalType != cmsSigLut16Type || cmsGetPCS(hProfile) != cmsSigLabData)
+ return Lut;
+
+ // If the input is Lab, add also a conversion at the begin
+ if (cmsGetColorSpace(hProfile) == cmsSigLabData &&
+ !cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID)))
+ goto Error;
+
+ // Add a matrix for conversion V2 to V4 Lab PCS
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
+ goto Error;
+
+ return Lut;
+Error:
+ cmsPipelineFree(Lut);
+ return NULL;
+ }
+ }
+
+ // Lut was not found, try to create a matrix-shaper
+
+ // Check if this is a grayscale profile.
+ if (cmsGetColorSpace(hProfile) == cmsSigGrayData) {
+
+ // if so, build appropiate conversion tables.
+ // The tables are the PCS iluminant, scaled across GrayTRC
+ return BuildGrayInputMatrixPipeline(hProfile);
+ }
+
+ // Not gray, create a normal matrix-shaper
+ return BuildRGBInputMatrixShaper(hProfile);
+}
+
+// ---------------------------------------------------------------------------------------------------------------
+
+// Gray output pipeline.
+// XYZ -> Gray or Lab -> Gray. Since we only know the GrayTRC, we need to do some assumptions. Gray component will be
+// given by Y on XYZ PCS and by L* on Lab PCS, Both across inverse TRC curve.
+// The complete pipeline on XYZ is Matrix[3:1] -> Tone curve and in Lab Matrix[3:1] -> Tone Curve as well.
+
+static
+cmsPipeline* BuildGrayOutputPipeline(cmsHPROFILE hProfile)
+{
+ cmsToneCurve *GrayTRC, *RevGrayTRC;
+ cmsPipeline* Lut;
+ cmsContext ContextID = cmsGetProfileContextID(hProfile);
+
+ GrayTRC = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGrayTRCTag);
+ if (GrayTRC == NULL) return NULL;
+
+ RevGrayTRC = cmsReverseToneCurve(GrayTRC);
+ if (RevGrayTRC == NULL) return NULL;
+
+ Lut = cmsPipelineAlloc(ContextID, 3, 1);
+ if (Lut == NULL) {
+ cmsFreeToneCurve(RevGrayTRC);
+ return NULL;
+ }
+
+ if (cmsGetPCS(hProfile) == cmsSigLabData) {
+
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 1, 3, PickLstarMatrix, NULL)))
+ goto Error;
+ }
+ else {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 1, 3, PickYMatrix, NULL)))
+ goto Error;
+ }
+
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 1, &RevGrayTRC)))
+ goto Error;
+
+ cmsFreeToneCurve(RevGrayTRC);
+ return Lut;
+
+Error:
+ cmsFreeToneCurve(RevGrayTRC);
+ cmsPipelineFree(Lut);
+ return NULL;
+}
+
+
+static
+cmsPipeline* BuildRGBOutputMatrixShaper(cmsHPROFILE hProfile)
+{
+ cmsPipeline* Lut;
+ cmsToneCurve *Shapes[3], *InvShapes[3];
+ cmsMAT3 Mat, Inv;
+ int i, j;
+ cmsContext ContextID = cmsGetProfileContextID(hProfile);
+
+ if (!ReadICCMatrixRGB2XYZ(&Mat, hProfile))
+ return NULL;
+
+ if (!_cmsMAT3inverse(&Mat, &Inv))
+ return NULL;
+
+ // XYZ PCS in encoded in 1.15 format, and the matrix input should come in 0..0xffff range, so
+ // we need to adjust the input by a << 1 to obtain a 1.16 fixed and then by a factor of
+ // (0xffff/0x10000) to put data in 0..0xffff range. Total factor is (2.0*65535.0)/65536.0;
+
+ for (i=0; i < 3; i++)
+ for (j=0; j < 3; j++)
+ Inv.v[i].n[j] *= OutpAdj;
+
+ Shapes[0] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigRedTRCTag);
+ Shapes[1] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigGreenTRCTag);
+ Shapes[2] = (cmsToneCurve *) cmsReadTag(hProfile, cmsSigBlueTRCTag);
+
+ if (!Shapes[0] || !Shapes[1] || !Shapes[2])
+ return NULL;
+
+ InvShapes[0] = cmsReverseToneCurve(Shapes[0]);
+ InvShapes[1] = cmsReverseToneCurve(Shapes[1]);
+ InvShapes[2] = cmsReverseToneCurve(Shapes[2]);
+
+ if (!InvShapes[0] || !InvShapes[1] || !InvShapes[2]) {
+ return NULL;
+ }
+
+ Lut = cmsPipelineAlloc(ContextID, 3, 3);
+ if (Lut != NULL) {
+
+ // Note that it is certainly possible a single profile would have a LUT based
+ // tag for output working in lab and a matrix-shaper for the fallback cases.
+ // This is not allowed by the spec, but this code is tolerant to those cases
+ if (cmsGetPCS(hProfile) == cmsSigLabData) {
+
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLab2XYZ(ContextID)))
+ goto Error;
+ }
+
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocMatrix(ContextID, 3, 3, (cmsFloat64Number*) &Inv, NULL)) ||
+ !cmsPipelineInsertStage(Lut, cmsAT_END, cmsStageAllocToneCurves(ContextID, 3, InvShapes)))
+ goto Error;
+ }
+
+ cmsFreeToneCurveTriple(InvShapes);
+ return Lut;
+Error:
+ cmsFreeToneCurveTriple(InvShapes);
+ cmsPipelineFree(Lut);
+ return NULL;
+}
+
+
+// Change CLUT interpolation to trilinear
+static
+void ChangeInterpolationToTrilinear(cmsPipeline* Lut)
+{
+ cmsStage* Stage;
+
+ for (Stage = cmsPipelineGetPtrToFirstStage(Lut);
+ Stage != NULL;
+ Stage = cmsStageNext(Stage)) {
+
+ if (cmsStageType(Stage) == cmsSigCLutElemType) {
+
+ _cmsStageCLutData* CLUT = (_cmsStageCLutData*) Stage ->Data;
+
+ CLUT ->Params->dwFlags |= CMS_LERP_FLAGS_TRILINEAR;
+ _cmsSetInterpolationRoutine(Lut->ContextID, CLUT ->Params);
+ }
+ }
+}
+
+
+// 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);
+ cmsColorSpaceSignature dataSpace = 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 ( PCS == cmsSigLabData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToLabFloat(ContextID)))
+ goto Error;
+ }
+ else
+ if (PCS == cmsSigXYZData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToXyzFloat(ContextID)))
+ goto Error;
+ }
+
+ // the output can be Lab or XYZ, in which case normalisation is needed on the end of the pipeline
+ if ( dataSpace == cmsSigLabData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromLabFloat(ContextID)))
+ goto Error;
+ }
+ else if (dataSpace == cmsSigXYZData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromXyzFloat(ContextID)))
+ goto Error;
+ }
+
+ return Lut;
+
+Error:
+ cmsPipelineFree(Lut);
+ return NULL;
+}
+
+// Create an output MPE LUT from agiven profile. Version mismatches are handled here
+cmsPipeline* _cmsReadOutputLUT(cmsHPROFILE hProfile, int Intent)
+{
+ cmsTagTypeSignature OriginalType;
+ cmsTagSignature tag16 = PCS2Device16[Intent];
+ cmsTagSignature tagFloat = PCS2DeviceFloat[Intent];
+ cmsContext ContextID = cmsGetProfileContextID(hProfile);
+
+
+ if (Intent != -1) {
+
+ if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
+
+ // Floating point LUT are always V4
+ return _cmsReadFloatOutputTag(hProfile, tagFloat);
+ }
+
+ // Revert to perceptual if no tag is found
+ if (!cmsIsTag(hProfile, tag16)) {
+ tag16 = PCS2Device16[0];
+ }
+
+ if (cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
+
+ // Check profile version and LUT type. Do the necessary adjustments if needed
+
+ // First read the tag
+ cmsPipeline* Lut = (cmsPipeline*) cmsReadTag(hProfile, tag16);
+ if (Lut == NULL) return NULL;
+
+ // After reading it, we have info about the original type
+ OriginalType = _cmsGetTagTrueType(hProfile, tag16);
+
+ // The profile owns the Lut, so we need to copy it
+ Lut = cmsPipelineDup(Lut);
+ if (Lut == NULL) return NULL;
+
+ // Now it is time for a controversial stuff. I found that for 3D LUTS using
+ // Lab used as indexer space, trilinear interpolation should be used
+ if (cmsGetPCS(hProfile) == cmsSigLabData)
+ ChangeInterpolationToTrilinear(Lut);
+
+ // We need to adjust data only for Lab and Lut16 type
+ if (OriginalType != cmsSigLut16Type || cmsGetPCS(hProfile) != cmsSigLabData)
+ return Lut;
+
+ // Add a matrix for conversion V4 to V2 Lab PCS
+ if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID)))
+ goto Error;
+
+ // If the output is Lab, add also a conversion at the end
+ if (cmsGetColorSpace(hProfile) == cmsSigLabData)
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
+ goto Error;
+
+ return Lut;
+Error:
+ cmsPipelineFree(Lut);
+ return NULL;
+ }
+ }
+
+ // Lut not found, try to create a matrix-shaper
+
+ // Check if this is a grayscale profile.
+ if (cmsGetColorSpace(hProfile) == cmsSigGrayData) {
+
+ // if so, build appropiate conversion tables.
+ // The tables are the PCS iluminant, scaled across GrayTRC
+ return BuildGrayOutputPipeline(hProfile);
+ }
+
+ // Not gray, create a normal matrix-shaper, which only operates in XYZ space
+ return BuildRGBOutputMatrixShaper(hProfile);
+}
+
+// ---------------------------------------------------------------------------------------------------------------
+
+// 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)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToLabFloat(ContextID)))
+ goto Error;
+ }
+ else
+ if (spc == cmsSigXYZData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageNormalizeToXyzFloat(ContextID)))
+ goto Error;
+ }
+
+ if (PCS == cmsSigLabData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromLabFloat(ContextID)))
+ goto Error;
+ }
+ else
+ if (PCS == cmsSigXYZData)
+ {
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageNormalizeFromXyzFloat(ContextID)))
+ goto Error;
+ }
+
+ return Lut;
+Error:
+ cmsPipelineFree(Lut);
+ return NULL;
+}
+
+// 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)
+{
+ cmsPipeline* Lut;
+ cmsTagTypeSignature OriginalType;
+ cmsTagSignature tag16 = Device2PCS16[Intent];
+ cmsTagSignature tagFloat = Device2PCSFloat[Intent];
+ cmsContext ContextID = cmsGetProfileContextID(hProfile);
+
+
+ // On named color, take the appropiate tag
+ if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
+
+ cmsNAMEDCOLORLIST* nc = (cmsNAMEDCOLORLIST*) cmsReadTag(hProfile, cmsSigNamedColor2Tag);
+
+ if (nc == NULL) return NULL;
+
+ Lut = cmsPipelineAlloc(ContextID, 0, 0);
+ if (Lut == NULL)
+ goto Error;
+
+ if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocNamedColor(nc, FALSE)))
+ goto Error;
+
+ if (cmsGetColorSpace(hProfile) == cmsSigLabData)
+ if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
+ goto Error;
+
+ return Lut;
+Error:
+ cmsPipelineFree(Lut);
+ cmsFreeNamedColorList(nc);
+ return NULL;
+ }
+
+ if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
+
+ // Floating point LUT are always V
+ return _cmsReadFloatDevicelinkTag(hProfile, tagFloat);
+ }
+
+ tagFloat = Device2PCSFloat[0];
+ if (cmsIsTag(hProfile, tagFloat)) {
+
+ return cmsPipelineDup((cmsPipeline*) cmsReadTag(hProfile, tagFloat));
+ }
+
+ if (!cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
+
+ tag16 = Device2PCS16[0];
+ if (!cmsIsTag(hProfile, tag16)) return NULL;
+ }
+
+ // Check profile version and LUT type. Do the necessary adjustments if needed
+
+ // Read the tag
+ Lut = (cmsPipeline*) cmsReadTag(hProfile, tag16);
+ if (Lut == NULL) return NULL;
+
+ // The profile owns the Lut, so we need to copy it
+ Lut = cmsPipelineDup(Lut);
+ if (Lut == NULL) return NULL;
+
+ // Now it is time for a controversial stuff. I found that for 3D LUTS using
+ // Lab used as indexer space, trilinear interpolation should be used
+ if (cmsGetPCS(hProfile) == cmsSigLabData)
+ ChangeInterpolationToTrilinear(Lut);
+
+ // After reading it, we have info about the original type
+ OriginalType = _cmsGetTagTrueType(hProfile, tag16);
+
+ // We need to adjust data for Lab16 on output
+ if (OriginalType != cmsSigLut16Type) return Lut;
+
+ // Here it is possible to get Lab on both sides
+
+ if (cmsGetColorSpace(hProfile) == cmsSigLabData) {
+ if(!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID)))
+ goto Error2;
+ }
+
+ if (cmsGetPCS(hProfile) == cmsSigLabData) {
+ if(!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
+ goto Error2;
+ }
+
+ return Lut;
+
+Error2:
+ cmsPipelineFree(Lut);
+ return NULL;
+}
+
+// ---------------------------------------------------------------------------------------------------------------
+
+// Returns TRUE if the profile is implemented as matrix-shaper
+cmsBool CMSEXPORT cmsIsMatrixShaper(cmsHPROFILE hProfile)
+{
+ switch (cmsGetColorSpace(hProfile)) {
+
+ case cmsSigGrayData:
+
+ return cmsIsTag(hProfile, cmsSigGrayTRCTag);
+
+ case cmsSigRgbData:
+
+ return (cmsIsTag(hProfile, cmsSigRedColorantTag) &&
+ cmsIsTag(hProfile, cmsSigGreenColorantTag) &&
+ cmsIsTag(hProfile, cmsSigBlueColorantTag) &&
+ cmsIsTag(hProfile, cmsSigRedTRCTag) &&
+ cmsIsTag(hProfile, cmsSigGreenTRCTag) &&
+ cmsIsTag(hProfile, cmsSigBlueTRCTag));
+
+ default:
+
+ return FALSE;
+ }
+}
+
+// Returns TRUE if the intent is implemented as CLUT
+cmsBool CMSEXPORT cmsIsCLUT(cmsHPROFILE hProfile, cmsUInt32Number Intent, cmsUInt32Number UsedDirection)
+{
+ const cmsTagSignature* TagTable;
+
+ // For devicelinks, the supported intent is that one stated in the header
+ if (cmsGetDeviceClass(hProfile) == cmsSigLinkClass) {
+ return (cmsGetHeaderRenderingIntent(hProfile) == Intent);
+ }
+
+ switch (UsedDirection) {
+
+ case LCMS_USED_AS_INPUT: TagTable = Device2PCS16; break;
+ case LCMS_USED_AS_OUTPUT:TagTable = PCS2Device16; break;
+
+ // For proofing, we need rel. colorimetric in output. Let's do some recursion
+ case LCMS_USED_AS_PROOF:
+ return cmsIsIntentSupported(hProfile, Intent, LCMS_USED_AS_INPUT) &&
+ cmsIsIntentSupported(hProfile, INTENT_RELATIVE_COLORIMETRIC, LCMS_USED_AS_OUTPUT);
+
+ default:
+ cmsSignalError(cmsGetProfileContextID(hProfile), cmsERROR_RANGE, "Unexpected direction (%d)", UsedDirection);
+ return FALSE;
+ }
+
+ return cmsIsTag(hProfile, TagTable[Intent]);
+
+}
+
+
+// Return info about supported intents
+cmsBool CMSEXPORT cmsIsIntentSupported(cmsHPROFILE hProfile,
+ cmsUInt32Number Intent, cmsUInt32Number UsedDirection)
+{
+
+ if (cmsIsCLUT(hProfile, Intent, UsedDirection)) return TRUE;
+
+ // Is there any matrix-shaper? If so, the intent is supported. This is a bit odd, since V2 matrix shaper
+ // does not fully support relative colorimetric because they cannot deal with non-zero black points, but
+ // many profiles claims that, and this is certainly not true for V4 profiles. Lets answer "yes" no matter
+ // the accuracy would be less than optimal in rel.col and v2 case.
+
+ return cmsIsMatrixShaper(hProfile);
+}
+
+
+// ---------------------------------------------------------------------------------------------------------------
+
+// Read both, profile sequence description and profile sequence id if present. Then combine both to
+// create qa unique structure holding both. Shame on ICC to store things in such complicated way.
+cmsSEQ* _cmsReadProfileSequence(cmsHPROFILE hProfile)
+{
+ cmsSEQ* ProfileSeq;
+ cmsSEQ* ProfileId;
+ cmsSEQ* NewSeq;
+ cmsUInt32Number i;
+
+ // Take profile sequence description first
+ ProfileSeq = (cmsSEQ*) cmsReadTag(hProfile, cmsSigProfileSequenceDescTag);
+
+ // Take profile sequence ID
+ ProfileId = (cmsSEQ*) cmsReadTag(hProfile, cmsSigProfileSequenceIdTag);
+
+ if (ProfileSeq == NULL && ProfileId == NULL) return NULL;
+
+ if (ProfileSeq == NULL) return cmsDupProfileSequenceDescription(ProfileId);
+ if (ProfileId == NULL) return cmsDupProfileSequenceDescription(ProfileSeq);
+
+ // We have to mix both together. For that they must agree
+ if (ProfileSeq ->n != ProfileId ->n) return cmsDupProfileSequenceDescription(ProfileSeq);
+
+ NewSeq = cmsDupProfileSequenceDescription(ProfileSeq);
+
+ // Ok, proceed to the mixing
+ if (NewSeq != NULL) {
+ for (i=0; i < ProfileSeq ->n; i++) {
+
+ memmove(&NewSeq ->seq[i].ProfileID, &ProfileId ->seq[i].ProfileID, sizeof(cmsProfileID));
+ NewSeq ->seq[i].Description = cmsMLUdup(ProfileId ->seq[i].Description);
+ }
+ }
+ return NewSeq;
+}
+
+// Dump the contents of profile sequence in both tags (if v4 available)
+cmsBool _cmsWriteProfileSequence(cmsHPROFILE hProfile, const cmsSEQ* seq)
+{
+ if (!cmsWriteTag(hProfile, cmsSigProfileSequenceDescTag, seq)) return FALSE;
+
+ if (cmsGetProfileVersion(hProfile) >= 4.0) {
+
+ if (!cmsWriteTag(hProfile, cmsSigProfileSequenceIdTag, seq)) return FALSE;
+ }
+
+ return TRUE;
+}
+
+
+// Auxiliar, read and duplicate a MLU if found.
+static
+cmsMLU* GetMLUFromProfile(cmsHPROFILE h, cmsTagSignature sig)
+{
+ cmsMLU* mlu = (cmsMLU*) cmsReadTag(h, sig);
+ if (mlu == NULL) return NULL;
+
+ return cmsMLUdup(mlu);
+}
+
+// Create a sequence description out of an array of profiles
+cmsSEQ* _cmsCompileProfileSequence(cmsContext ContextID, cmsUInt32Number nProfiles, cmsHPROFILE hProfiles[])
+{
+ cmsUInt32Number i;
+ cmsSEQ* seq = cmsAllocProfileSequenceDescription(ContextID, nProfiles);
+
+ if (seq == NULL) return NULL;
+
+ for (i=0; i < nProfiles; i++) {
+
+ cmsPSEQDESC* ps = &seq ->seq[i];
+ cmsHPROFILE h = hProfiles[i];
+ cmsTechnologySignature* techpt;
+
+ cmsGetHeaderAttributes(h, &ps ->attributes);
+ cmsGetHeaderProfileID(h, ps ->ProfileID.ID8);
+ ps ->deviceMfg = cmsGetHeaderManufacturer(h);
+ ps ->deviceModel = cmsGetHeaderModel(h);
+
+ techpt = (cmsTechnologySignature*) cmsReadTag(h, cmsSigTechnologyTag);
+ if (techpt == NULL)
+ ps ->technology = (cmsTechnologySignature) 0;
+ else
+ ps ->technology = *techpt;
+
+ ps ->Manufacturer = GetMLUFromProfile(h, cmsSigDeviceMfgDescTag);
+ ps ->Model = GetMLUFromProfile(h, cmsSigDeviceModelDescTag);
+ ps ->Description = GetMLUFromProfile(h, cmsSigProfileDescriptionTag);
+
+ }
+
+ return seq;
+}
+
+// -------------------------------------------------------------------------------------------------------------------
+
+
+static
+const cmsMLU* GetInfo(cmsHPROFILE hProfile, cmsInfoType Info)
+{
+ cmsTagSignature sig;
+
+ switch (Info) {
+
+ case cmsInfoDescription:
+ sig = cmsSigProfileDescriptionTag;
+ break;
+
+ case cmsInfoManufacturer:
+ sig = cmsSigDeviceMfgDescTag;
+ break;
+
+ case cmsInfoModel:
+ sig = cmsSigDeviceModelDescTag;
+ break;
+
+ case cmsInfoCopyright:
+ sig = cmsSigCopyrightTag;
+ break;
+
+ default: return NULL;
+ }
+
+
+ return (cmsMLU*) cmsReadTag(hProfile, sig);
+}
+
+
+
+cmsUInt32Number CMSEXPORT cmsGetProfileInfo(cmsHPROFILE hProfile, cmsInfoType Info,
+ const char LanguageCode[3], const char CountryCode[3],
+ wchar_t* Buffer, cmsUInt32Number BufferSize)
+{
+ const cmsMLU* mlu = GetInfo(hProfile, Info);
+ if (mlu == NULL) return 0;
+
+ return cmsMLUgetWide(mlu, LanguageCode, CountryCode, Buffer, BufferSize);
+}
+
+
+cmsUInt32Number CMSEXPORT cmsGetProfileInfoASCII(cmsHPROFILE hProfile, cmsInfoType Info,
+ const char LanguageCode[3], const char CountryCode[3],
+ char* Buffer, cmsUInt32Number BufferSize)
+{
+ const cmsMLU* mlu = GetInfo(hProfile, Info);
+ if (mlu == NULL) return 0;
+
+ return cmsMLUgetASCII(mlu, LanguageCode, CountryCode, Buffer, BufferSize);
+}