Add color gamut xform helpers to GrGLSLShaderBuilder

src/gpu/effects/GrSimpleTextureEffect.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrSimpleTextureEffect.h"
 #include "GrInvariantOutput.h"
 #include "GrTexture.h"
+#include "glsl/GrGLSLColorSpaceXformHelper.h"
 #include "glsl/GrGLSLFragmentProcessor.h"
 #include "glsl/GrGLSLFragmentShaderBuilder.h"
 
 class GrGLSimpleTextureEffect : public GrGLSLFragmentProcessor {
 public:
     void emitCode(EmitArgs& args) override {
+        const GrSimpleTextureEffect& textureEffect = args.fFp.cast<GrSimpleTextureEffect>();
+        GrGLSLColorSpaceXformHelper colorSpaceHelper(args.fUniformHandler,
+                                                     textureEffect.colorSpaceXform(),
+                                                     &fColorSpaceXformUni);
+
         GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
         fragBuilder->codeAppendf("%s = ", args.fOutputColor);
         fragBuilder->appendTextureLookupAndModulate(args.fInputColor,
-                                                  args.fTexSamplers[0],
-                                                  args.fCoords[0].c_str(),
-                                                  args.fCoords[0].getType());
+                                                    args.fTexSamplers[0],
+                                                    args.fCoords[0].c_str(),
+                                                    args.fCoords[0].getType(),
+                                                    &colorSpaceHelper);
         fragBuilder->codeAppend(";");
     }
 
+    static inline void GenKey(const GrProcessor& effect, const GrGLSLCaps&,
+                              GrProcessorKeyBuilder* b) {
+        const GrSimpleTextureEffect& textureEffect = effect.cast<GrSimpleTextureEffect>();
+        b->add32(GrColorSpaceXform::XformKey(textureEffect.colorSpaceXform()));
+    }
+
+protected:
+    void onSetData(const GrGLSLProgramDataManager& pdman, const GrProcessor& processor) override {
+        const GrSimpleTextureEffect& textureEffect = processor.cast<GrSimpleTextureEffect>();
+        if (SkToBool(textureEffect.colorSpaceXform())) {
+            pdman.setMatrix4f(fColorSpaceXformUni, textureEffect.colorSpaceXform()->srcToDst());
+        }
+    }
+
 private:
     typedef GrGLSLFragmentProcessor INHERITED;
+
+    UniformHandle fColorSpaceXformUni;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 void GrSimpleTextureEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
     this->updateInvariantOutputForModulation(inout);
 }
 
 void GrSimpleTextureEffect::onGetGLSLProcessorKey(const GrGLSLCaps& caps,
                                                   GrProcessorKeyBuilder* b) const {
@@ skipping 25 matching lines @@
 
     static const GrCoordSet kCoordSets[] = {
         kLocal_GrCoordSet,
         kDevice_GrCoordSet
     };
     GrCoordSet coordSet = kCoordSets[d->fRandom->nextULessThan(SK_ARRAY_COUNT(kCoordSets))];
 
     const SkMatrix& matrix = GrTest::TestMatrix(d->fRandom);
     return GrSimpleTextureEffect::Make(d->fTextures[texIdx], nullptr, matrix, coordSet);
 }