Adding 3D lut color filter

src/gpu/gl/GrGLProgramEffects.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "GrGLProgramEffects.h"
 #include "GrDrawEffect.h"
@@ skipping 197 matching lines @@
 
 void GrGLProgramEffects::emitSamplers(GrGLProgramBuilder* builder,
                                       const GrEffect* effect,
                                       TextureSamplerArray* outSamplers) {
     SkTArray<Sampler, true>& samplers = fSamplers.push_back();
     int numTextures = effect->numTextures();
     samplers.push_back_n(numTextures);
     SkString name;
     for (int t = 0; t < numTextures; ++t) {
         name.printf("Sampler%d", t);
+        const GrTextureAccess& textureAccess = effect->textureAccess(t);
         samplers[t].fUniform = builder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
-                                                   kSampler2D_GrSLType,
-                                                   name.c_str());
+            SkToBool(textureAccess.getTexture()->desc().fFlags & k3DTexture_GrTextureFlagBit) ?
+            kSampler3D_GrSLType : kSampler2D_GrSLType, name.c_str());
         SkNEW_APPEND_TO_TARRAY(outSamplers, TextureSampler,
-                               (samplers[t].fUniform, effect->textureAccess(t)));
+                               (samplers[t].fUniform, textureAccess));
     }
 }
 
 void GrGLProgramEffects::initSamplers(const GrGLProgramDataManager& programResourceManager, int* texUnitIdx) {
     int numEffects = fGLEffects.count();
     SkASSERT(numEffects == fSamplers.count());
     for (int e = 0; e < numEffects; ++e) {
         SkTArray<Sampler, true>& samplers = fSamplers[e];
         int numSamplers = samplers.count();
         for (int s = 0; s < numSamplers; ++s) {
@@ skipping 334 matching lines @@
 }
 void GrGLPathTexGenProgramEffectsBuilder::emitEffect(const GrEffectStage& stage,
                                                      const GrEffectKey& key,
                                                      const char* outColor,
                                                      const char* inColor,
                                                      int stageIndex) {
     SkASSERT(fProgramEffects.get());
     fProgramEffects->emitEffect(fBuilder, stage, key, outColor, inColor, stageIndex);
 }