Add GrEllipseEdgeEffect

include/gpu/GrTBackendEffectFactory.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTBackendEffectFactory_DEFINED
 #define GrTBackendEffectFactory_DEFINED
 
@@ skipping 17 matching lines @@
     /** Returns a value that identifies the GLSL shader code generated by
         a GrEffect. This enables caching of generated shaders. Part of the
         id identifies the GrEffect subclass. The remainder is based
         on the aspects of the GrEffect object's configuration that affect
         GLSL code generation. */
     virtual EffectKey glEffectKey(const GrEffectStage& stage,
                                   const GrGLCaps& caps) const SK_OVERRIDE {
         GrAssert(kIllegalEffectClassID != fEffectClassID);
         EffectKey effectKey = GLEffect::GenKey(stage, caps);
         EffectKey textureKey = GLEffect::GenTextureKey(stage.getEffect(), caps);
+        EffectKey attribKey = GLEffect::GenAttribKey(stage);
 #if GR_DEBUG
         static const EffectKey kIllegalIDMask = (uint16_t) (~((1U << kEffectKeyBits) - 1));
         GrAssert(!(kIllegalIDMask & effectKey));
 
         static const EffectKey kIllegalTextureKeyMask = (uint16_t) (~((1U << kTextureKeyBits) - 1));
         GrAssert(!(kIllegalTextureKeyMask & textureKey));
+
+        static const EffectKey kIllegalAttribKeyMask = (uint16_t) (~((1U << kAttribKeyBits) - 1));
+        GrAssert(!(kIllegalAttribKeyMask & textureKey));
 #endif
-        return fEffectClassID | (textureKey << kEffectKeyBits) | effectKey;
+        return fEffectClassID | (attribKey << (kEffectKeyBits+kTextureKeyBits)) | 
+               (textureKey << kEffectKeyBits) | effectKey;
     }
 
     /** Returns a new instance of the appropriate *GL* implementation class
         for the given GrEffect; caller is responsible for deleting
         the object. */
     virtual GLEffect* createGLInstance(const GrEffectRef& effect) const SK_OVERRIDE {
         return SkNEW_ARGS(GLEffect, (*this, effect));
     }
 
     /** This class is a singleton. This function returns the single instance.
      */
     static const GrBackendEffectFactory& getInstance() {
         static SkAlignedSTStorage<1, GrTBackendEffectFactory> gInstanceMem;
         static const GrTBackendEffectFactory* gInstance;
         if (!gInstance) {
             gInstance = SkNEW_PLACEMENT(gInstanceMem.get(),
                                         GrTBackendEffectFactory);
         }
         return *gInstance;
     }
 
 protected:
     GrTBackendEffectFactory() {
         fEffectClassID = GenID() << (kEffectKeyBits + kTextureKeyBits) ;
     }
 };
 
 #endif