Add bevel-stroke support in GrAARectRenderer

src/gpu/GrAARectRenderer.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrAARectRenderer_DEFINED
 #define GrAARectRenderer_DEFINED
 
 #include "SkMatrix.h"
 #include "SkRect.h"
 #include "SkRefCnt.h"
+#include "SkStrokeRec.h"
 
 class GrGpu;
 class GrDrawTarget;
 class GrIndexBuffer;
 
 /*
  * This class wraps helper functions that draw AA rects (filled & stroked)
  */
 class GrAARectRenderer : public SkRefCnt {
 public:
     SK_DECLARE_INST_COUNT(GrAARectRenderer)
 
     GrAARectRenderer()
     : fAAFillRectIndexBuffer(NULL)
-    , fAAStrokeRectIndexBuffer(NULL) {
+    , fAAMiterStrokeRectIndexBuffer(NULL)
+    , fAABevelStrokeRectIndexBuffer(NULL) {
     }
 
     void reset();
 
     ~GrAARectRenderer() {
         this->reset();
     }
 
     // TODO: potentialy fuse the fill & stroke methods and differentiate
-    // between them by passing in strokeWidth (<0 means fill).
+    // between them by passing in stroke (==NULL means fill).
 
     void fillAARect(GrGpu* gpu,
                     GrDrawTarget* target,
                     const SkRect& rect,
                     const SkMatrix& combinedMatrix,
                     const SkRect& devRect,
                     bool useVertexCoverage) {
 #ifdef SHADER_AA_FILL_RECT
         if (combinedMatrix.rectStaysRect()) {
             this->shaderFillAlignedAARect(gpu, target,
                                           rect, combinedMatrix);
         } else {
             this->shaderFillAARect(gpu, target,
                                    rect, combinedMatrix);
         }
 #else
         this->geometryFillAARect(gpu, target,
                                  rect, combinedMatrix,
                                  devRect, useVertexCoverage);
 #endif
     }
 
     void strokeAARect(GrGpu* gpu,
                       GrDrawTarget* target,
                       const SkRect& rect,
                       const SkMatrix& combinedMatrix,
                       const SkRect& devRect,
-                      SkScalar width,
+                      const SkStrokeRec* stroke,
                       bool useVertexCoverage);
 
     // First rect is outer; second rect is inner
     void fillAANestedRects(GrGpu* gpu,
                            GrDrawTarget* target,
                            const SkRect rects[2],
                            const SkMatrix& combinedMatrix,
                            bool useVertexCoverage);
 
 private:
     GrIndexBuffer*              fAAFillRectIndexBuffer;
-    GrIndexBuffer*              fAAStrokeRectIndexBuffer;
+    GrIndexBuffer*              fAAMiterStrokeRectIndexBuffer;
+    GrIndexBuffer*              fAABevelStrokeRectIndexBuffer;
 
     GrIndexBuffer* aaFillRectIndexBuffer(GrGpu* gpu);
 
-    static int aaStrokeRectIndexCount();
-    GrIndexBuffer* aaStrokeRectIndexBuffer(GrGpu* gpu);
+    static int aaStrokeRectIndexCount(bool miterStroke);
+    GrIndexBuffer* aaStrokeRectIndexBuffer(GrGpu* gpu, bool miterStroke);
 
     // TODO: Remove the useVertexCoverage boolean. Just use it all the time
     // since we now have a coverage vertex attribute
     void geometryFillAARect(GrGpu* gpu,
                             GrDrawTarget* target,
                             const SkRect& rect,
                             const SkMatrix& combinedMatrix,
                             const SkRect& devRect,
                             bool useVertexCoverage);
 
     void shaderFillAARect(GrGpu* gpu,
                           GrDrawTarget* target,
                           const SkRect& rect,
                           const SkMatrix& combinedMatrix);
 
     void shaderFillAlignedAARect(GrGpu* gpu,
                                  GrDrawTarget* target,
                                  const SkRect& rect,
                                  const SkMatrix& combinedMatrix);
 
     void geometryStrokeAARect(GrGpu* gpu,
                               GrDrawTarget* target,
                               const SkRect& devOutside,
+                              const SkRect& devOutsideAssist,
                               const SkRect& devInside,
-                              bool useVertexCoverage);
+                              bool useVertexCoverage,
+                              bool miterStroke);
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif // GrAARectRenderer_DEFINED