Add GPU support for roundrects

include/gpu/GrOvalRenderer.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 GrOvalRenderer_DEFINED
 #define GrOvalRenderer_DEFINED
 
 #include "GrContext.h"
 #include "GrPaint.h"
 #include "GrRefCnt.h"
 #include "GrRect.h"
 
 class GrContext;
 class GrDrawTarget;
 class GrPaint;
 class SkStrokeRec;
 
 /*
- * This class wraps helper functions that draw ovals (filled & stroked)
+ * This class wraps helper functions that draw ovals and roundrects (filled & stroked)
  */
 class GrOvalRenderer : public GrRefCnt {
 public:
     SK_DECLARE_INST_COUNT(GrOvalRenderer)
 
-    GrOvalRenderer() {}
-
+    GrOvalRenderer() : fRRectIndexBuffer(NULL) {}
     ~GrOvalRenderer() {}
 
     bool drawOval(GrDrawTarget* target, const GrContext* context, const GrPaint& paint,
                   const GrRect& oval, const SkStrokeRec& stroke);
+    bool drawSimpleRRect(GrDrawTarget* target, GrContext* context, const GrPaint& paint,
+                         const SkRRect& rrect, const SkStrokeRec& stroke);
+
 private:
     bool drawEllipse(GrDrawTarget* target, const GrPaint& paint,
                      const GrRect& ellipse,
                      const SkStrokeRec& stroke);
     void drawCircle(GrDrawTarget* target, const GrPaint& paint,
                     const GrRect& circle,
                     const SkStrokeRec& stroke);
 
+    GrIndexBuffer* rRectIndexBuffer(GrGpu* gpu);
+    
+    GrIndexBuffer* fRRectIndexBuffer;
+    
     typedef GrRefCnt INHERITED;
 };
 
 #endif // GrOvalRenderer_DEFINED