separate arrays for color and coverage effects.

src/gpu/gl/GrGLProgramDesc.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLProgramDesc_DEFINED
 #define GrGLProgramDesc_DEFINED
 
@@ skipping 37 matching lines @@
                    const GrRenderTarget* dummyDstRenderTarget,
                    const GrTexture* dummyDstCopyTexture,
                    const GrEffectStage* stages[],
                    int numColorStages,
                    int numCoverageStages,
                    int currAttribIndex);
 
     /**
      * Builds a program descriptor from a GrDrawState. Whether the primitive type is points, the
      * output of GrDrawState::getBlendOpts, and the caps of the GrGpuGL are also inputs. It also
-     * writes a tightly packed array of GrEffectStage* from the drawState.
+     * outputs the color and coverage stages referenced by the generated descriptor. This may
+     * not contain all stages from the draw state and coverage stages from the drawState may
+     * be treated as color stages in the output.
      */
     static void Build(const GrDrawState&,
                       bool isPoints,
                       GrDrawState::BlendOptFlags,
                       GrBlendCoeff srcCoeff,
                       GrBlendCoeff dstCoeff,
                       const GrGpuGL* gpu,
                       const GrDeviceCoordTexture* dstCopy,
-                      const GrEffectStage* outStages[GrDrawState::kNumStages],
+                      SkTArray<const GrEffectStage*, true>* outColorStages,
+                      SkTArray<const GrEffectStage*, true>* outCoverageStages,
                       GrGLProgramDesc* outDesc);
 
     int numColorEffects() const {
         GrAssert(fInitialized);
         return this->getHeader().fColorEffectCnt;
     }
 
     int numCoverageEffects() const {
         GrAssert(fInitialized);
         return this->getHeader().fCoverageEffectCnt;
@@ skipping 131 matching lines @@
     SkAutoSMalloc<kPreAllocSize> fKey;
     bool fInitialized;
 
     // GrGLProgram and GrGLShaderBuilder read the private fields to generate code. TODO: Move all
     // code generation to GrGLShaderBuilder (and maybe add getters rather than friending).
     friend class GrGLProgram;
     friend class GrGLShaderBuilder;
 };
 
 #endif