Add a requiresVertexShader method to GrGLEffect

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 "gl/GrGLEffect.h"
 #include "gl/GrGLEffectMatrix.h"
 #include "gl/GrGLSL.h"
 #include "gl/GrGLTexture.h"
 #include "GrTBackendEffectFactory.h"
 #include "GrTexture.h"
 
 class GrGLSimpleTextureEffect : public GrGLEffect {
 public:
     GrGLSimpleTextureEffect(const GrBackendEffectFactory& factory, const GrDrawEffect& drawEffect)
     : INHERITED (factory) {
         GrEffect::CoordsType coordsType =
             drawEffect.castEffect<GrSimpleTextureEffect>().coordsType();
         if (GrEffect::kCustom_CoordsType != coordsType) {
             SkNEW_IN_TLAZY(&fEffectMatrix, GrGLEffectMatrix, (coordsType));
         }
     }
 
+    virtual bool requiresVertexShader(const GrDrawEffect& drawEffect) const SK_OVERRIDE {
+        const GrSimpleTextureEffect& ste = drawEffect.castEffect<GrSimpleTextureEffect>();
+        return GrEffect::kCustom_CoordsType == ste.coordsType();
+    }
+
     virtual void emitCode(GrGLShaderBuilder* builder,
                           const GrDrawEffect& drawEffect,
                           EffectKey key,
                           const char* outputColor,
                           const char* inputColor,
                           const TextureSamplerArray& samplers) SK_OVERRIDE {
         const GrSimpleTextureEffect& ste = drawEffect.castEffect<GrSimpleTextureEffect>();
         SkString fsCoordName;
         GrSLType fsCoordSLType;
         if (GrEffect::kCustom_CoordsType == ste.coordsType()) {
@@ skipping 86 matching lines @@
     };
     CoordsType coordsType = kCoordsTypes[random->nextULessThan(GR_ARRAY_COUNT(kCoordsTypes))];
 
     if (kCustom_CoordsType == coordsType) {
         return GrSimpleTextureEffect::CreateWithCustomCoords(textures[texIdx], params);
     } else {
         const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
         return GrSimpleTextureEffect::Create(textures[texIdx], matrix);
     }
 }