Step towards variable length effect keys.

src/gpu/gl/GrGpuGL_program.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGpuGL.h"
 
 #include "GrEffect.h"
@@ skipping 216 matching lines @@
         GrBlendCoeff srcCoeff;
         GrBlendCoeff dstCoeff;
         GrDrawState::BlendOptFlags blendOpts = drawState.getBlendOpts(false, &srcCoeff, &dstCoeff);
         if (GrDrawState::kSkipDraw_BlendOptFlag & blendOpts) {
             return false;
         }
 
         SkSTArray<8, const GrEffectStage*, true> colorStages;
         SkSTArray<8, const GrEffectStage*, true> coverageStages;
         GrGLProgramDesc desc;
-        GrGLProgramDesc::Build(this->getDrawState(),
+        if (!GrGLProgramDesc::Build(this->getDrawState(),
                                type,
                                blendOpts,
                                srcCoeff,
                                dstCoeff,
                                this,
                                dstCopy,
                                &colorStages,
                                &coverageStages,
-                               &desc);
+                               &desc)) {
+            SkDEBUGFAIL("Failed to generate GL program descriptor");
+            return false;
+        }
 
         fCurrentProgram.reset(fProgramCache->getProgram(desc,
                                                         colorStages.begin(),
                                                         coverageStages.begin()));
         if (NULL == fCurrentProgram.get()) {
             SkDEBUGFAIL("Failed to create program!");
             return false;
         }
 
         SkASSERT((kDrawPath_DrawType != type && kDrawPaths_DrawType != type)
@@ skipping 104 matching lines @@
                              GrGLAttribTypeToLayout(attribType).fCount,
                              GrGLAttribTypeToLayout(attribType).fType,
                              GrGLAttribTypeToLayout(attribType).fNormalized,
                              stride,
                              reinterpret_cast<GrGLvoid*>(
                                  vertexOffsetInBytes + vertexAttrib->fOffset));
         }
         attribState->disableUnusedArrays(this, usedAttribArraysMask);
     }
 }