Make GrGLProgramDesc's key variable length by compacting the effect key array

src/gpu/gl/GrGLProgram.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrGLProgram_DEFINED
 #define GrGLProgram_DEFINED
@@ skipping 30 matching lines @@
                                const GrEffectStage* stages[]);
 
     virtual ~GrGLProgram();
 
     /**
      * Call to abandon GL objects owned by this program.
      */
     void abandon();
 
     /**
-     * The shader may modify the blend coefficients. Params are in/out
+     * The shader may modify the blend coefficients. Params are in/out.
      */
     void overrideBlend(GrBlendCoeff* srcCoeff, GrBlendCoeff* dstCoeff) const;
 
     const GrGLProgramDesc& getDesc() { return fDesc; }
 
     /**
      * Gets the GL program ID for this program.
      */
     GrGLuint programID() const { return fProgramID; }
 
@@ skipping 35 matching lines @@
             fRenderTargetSize.fWidth = -1;
             fRenderTargetSize.fHeight = -1;
             fRenderTargetOrigin = (GrSurfaceOrigin) -1;
         }
     };
 
     /**
      * This function uploads uniforms and calls each GrGLEffect's setData. It is called before a
      * draw occurs using the program after the program has already been bound. It also uses the
      * GrGpuGL object to bind the textures required by the GrGLEffects.
-     *
-     * The color and coverage params override the GrDrawState's getColor() and getCoverage() values.
      */
     void setData(GrGpuGL*,
-                 GrColor color,
-                 GrColor coverage,
+                 GrDrawState::BlendOptFlags,
+                 const GrEffectStage* stages[],       // output of GrGLProgramDesc:Build()
                  const GrDeviceCoordTexture* dstCopy, // can be NULL
                  SharedGLState*);
 
 private:
     GrGLProgram(const GrGLContext& gl,
                 const GrGLProgramDesc& desc,
                 const GrEffectStage* stages[]);
 
     bool succeeded() const { return 0 != fProgramID; }
 
     /**
-     *  This is the heavy initialization routine for building a GLProgram.
+     * This is the heavy initialization routine for building a GLProgram. stages is all the enabled
+     * color stages followed by all the enabled coverage stages as output by
+     * GrGLProgramDesc::Build()
      */
     bool genProgram(const GrEffectStage* stages[]);
 
     GrSLConstantVec genInputColor(GrGLShaderBuilder* builder, SkString* inColor);
 
     GrSLConstantVec genInputCoverage(GrGLShaderBuilder* builder, SkString* inCoverage);
 
     void genGeometryShader(GrGLShaderBuilder* segments) const;
 
     typedef GrGLUniformManager::UniformHandle UniformHandle;
@@ skipping 70 matching lines @@
     GrGLProgramDesc             fDesc;
     const GrGLContext&          fContext;
 
     GrGLUniformManager          fUniformManager;
     UniformHandles              fUniformHandles;
 
     typedef GrRefCnt INHERITED;
 };
 
 #endif