Adds local coords to GrEffect system.

include/gpu/GrEffect.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 GrEffect_DEFINED
 #define GrEffect_DEFINED
 
@@ skipping 52 matching lines @@
     There is no public way to wrap a GrEffect in a GrEffectRef. Thus, a factory should be a static
     member function of a GrEffect subclass.
 
     Because almost no code should ever handle a GrEffect outside of a GrEffectRef, we privately
     inherit from GrRefCnt to help prevent accidental direct ref'ing/unref'ing of effects.
   */
 class GrEffect : private GrRefCnt {
 public:
     SK_DECLARE_INST_COUNT(GrEffect)
 
+    /**
+     * The types of vertex coordinates available to an effect in the vertex shader. Effects can
+     * require their own vertex attribute but these coordinates are made available by the framework
+     * in all programs. kCustom_CoordsType is provided to signify that an alternative set of coords
+     * is used (usually an explicit vertex attribute) but its meaning is determined by the effect
+     * subclass.
+     */
+    enum CoordsType {
+        kLocal_CoordsType,
+        kPosition_CoordsType,
+
+        kCustom_CoordsType,
+    };
+
     virtual ~GrEffect();
 
     /**
      * Flags for getConstantColorComponents. They are defined so that the bit order reflects the
      * GrColor shift order.
      */
     enum ValidComponentFlags {
         kR_ValidComponentFlag = 1 << (GrColor_SHIFT_R / 8),
         kG_ValidComponentFlag = 1 << (GrColor_SHIFT_G / 8),
         kB_ValidComponentFlag = 1 << (GrColor_SHIFT_B / 8),
@@ skipping 186 matching lines @@
     typedef GrRefCnt INHERITED;
 };
 
 inline GrEffectRef::GrEffectRef(GrEffect* effect) {
     GrAssert(NULL != effect);
     effect->ref();
     fEffect = effect;
 }
 
 #endif