Add a requiresVertexShader method to GrGLEffect

src/gpu/GrAAConvexPathRenderer.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 "GrAAConvexPathRenderer.h"
 
@@ skipping 506 matching lines @@
 
     virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE {
         return GrTBackendEffectFactory<QuadEdgeEffect>::getInstance();
     }
 
     class GLEffect : public GrGLEffect {
     public:
         GLEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&)
             : INHERITED (factory) {}
 
+        virtual bool requiresVertexShader(const GrDrawEffect&) const SK_OVERRIDE { return true; }
+
         virtual void emitCode(GrGLShaderBuilder* builder,
                               const GrDrawEffect& drawEffect,
                               EffectKey key,
                               const char* outputColor,
                               const char* inputColor,
                               const TextureSamplerArray& samplers) SK_OVERRIDE {
             GrGLShaderBuilder::VertexBuilder* vertexBuilder = builder->getVertexBuilder();
             SkASSERT(NULL != vertexBuilder);
 
             const char *vsName, *fsName;
@@ skipping 167 matching lines @@
                             vOffset,  // start vertex
                             0,        // start index
                             draw.fVertexCnt,
                             draw.fIndexCnt,
                             &devBounds);
         vOffset += draw.fVertexCnt;
     }
 
     return true;
 }