create and thread batch tracker object

src/gpu/gl/GrGLGeometryProcessor.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 GrGLGeometryProcessor_DEFINED
 #define GrGLGeometryProcessor_DEFINED
 
 #include "GrGLProcessor.h"
 
+class GrBatchTracker;
 class GrGLGPBuilder;
 
 /**
  * If a GL effect needs a GrGLFullShaderBuilder* object to emit vertex code, then it must inherit
  * from this class. Since paths don't have vertices, this class is only meant to be used internally
  * by skia, for special cases.
  */
 class GrGLGeometryProcessor : public GrGLProcessor {
 public:
     GrGLGeometryProcessor(const GrBackendProcessorFactory& factory)
         : INHERITED(factory) {}
 
     struct EmitArgs {
         EmitArgs(GrGLGPBuilder* pb,
                  const GrGeometryProcessor& gp,
+                 const GrBatchTracker& bt,
                  const char* outputColor,
                  const char* outputCoverage,
                  const TextureSamplerArray& samplers)
             : fPB(pb)
             , fGP(gp)
+            , fBT(bt)
             , fOutputColor(outputColor)
             , fOutputCoverage(outputCoverage)
             , fSamplers(samplers) {}
         GrGLGPBuilder* fPB;
         const GrGeometryProcessor& fGP;
+        const GrBatchTracker& fBT;
         const char* fOutputColor;
         const char* fOutputCoverage;
         const TextureSamplerArray& fSamplers;
     };
     /**
      * This is similar to emitCode() in the base class, except it takes a full shader builder.
      * This allows the effect subclass to emit vertex code.
      */
     virtual void emitCode(const EmitArgs&) = 0;
 
+    /** A GrGLGeometryProcessor instance can be reused with any GrGLGeometryProcessor that produces
+        the same stage key; this function reads data from a GrGLGeometryProcessor and uploads any
+        uniform variables required  by the shaders created in emitCode(). The GrGeometryProcessor
+        parameter is guaranteed to be of the same type that created this GrGLGeometryProcessor and
+        to have an identical effect key as the one that created this GrGLGeometryProcessor.  */

[bsalomon, 2014/12/03 19:38:32]

identical processor key?

+    virtual void setData(const GrGLProgramDataManager&,
+                         const GrGeometryProcessor&,
+                         const GrBatchTracker&) = 0;
+
 private:
     typedef GrGLProcessor INHERITED;
 };
 
 #endif