Add color gamut xform helpers to GrGLSLShaderBuilder

src/gpu/effects/GrSimpleTextureEffect.cpp

Index: src/gpu/effects/GrSimpleTextureEffect.cpp
diff --git a/src/gpu/effects/GrSimpleTextureEffect.cpp b/src/gpu/effects/GrSimpleTextureEffect.cpp
index a452d3e6fdf064038996a9c2983ac5c9aa8f6904..8e452814b9567af72ceab292ee8957d1533a25bc 100644
--- a/src/gpu/effects/GrSimpleTextureEffect.cpp
+++ b/src/gpu/effects/GrSimpleTextureEffect.cpp
@@ -8,23 +8,46 @@
 #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;
 };
 
 ///////////////////////////////////////////////////////////////////////////////