Create xfer processor backend.

src/gpu/gl/GrGLProgramDesc.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrGLProgramDesc.h"
 
 #include "GrGLProcessor.h"
 #include "GrProcessor.h"
@@ skipping 171 matching lines @@
             desc->fKey.reset();
             return false;
         }
     }
 
     for (int s = 0; s < optState.numFragmentStages(); ++s) {
         const GrPendingFragmentStage& fps = optState.getFragmentStage(s);
         const GrFragmentProcessor& fp = *fps.getProcessor();
         GrProcessorKeyBuilder b(&desc->fKey);
         fp.getGLProcessorKey(gpu->glCaps(), &b);
-        if (!get_meta_key(*fps.getProcessor(), gpu->glCaps(),
-                         gen_transform_key(fps, requiresLocalCoordAttrib), 0, &b)) {
+        if (!get_meta_key(fp, gpu->glCaps(),
+                          gen_transform_key(fps, requiresLocalCoordAttrib), 0, &b)) {
             desc->fKey.reset();
             return false;
         }
     }
 
+    const GrXferProcessor& xp = *optState.getXferProcessor();
+    GrProcessorKeyBuilder b(&desc->fKey);
+    xp.getGLProcessorKey(gpu->glCaps(), &b);
+    if (!get_meta_key(xp, gpu->glCaps(), 0, 0, &b)) {
+        desc->fKey.reset();
+        return false;
+    }
+
     // --------DO NOT MOVE HEADER ABOVE THIS LINE--------------------------------------------------
     // Because header is a pointer into the dynamic array, we can't push any new data into the key
     // below here.
     GLKeyHeader* header = desc->atOffset<GLKeyHeader, kHeaderOffset>();
 
     // make sure any padding in the header is zeroed.
     memset(header, 0, kHeaderSize);
 
     header->fHasGeometryProcessor = optState.hasGeometryProcessor();
 
@@ skipping 44 matching lines @@
     }
 
     if (descInfo.fReadsFragPosition) {
         header->fFragPosKey =
                 GrGLFragmentShaderBuilder::KeyForFragmentPosition(optState.getRenderTarget(),
                                                                   gpu->glCaps());
     } else {
         header->fFragPosKey = 0;
     }
 
-    header->fPrimaryOutputType = descInfo.fPrimaryOutputType;
-    header->fSecondaryOutputType = descInfo.fSecondaryOutputType;
-
     header->fColorEffectCnt = optState.numColorStages();
     header->fCoverageEffectCnt = optState.numCoverageStages();
     desc->finalize();
     return true;
 }