Screenspace AA tessellated path rendering.

src/gpu/GrTessellator.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTessellator_DEFINED
 #define GrTessellator_DEFINED
 
+#include "GrColor.h"
 #include "SkPoint.h"
 
 class SkPath;
 struct SkRect;
 
 /**
  * Provides utility functions for converting paths to a collection of triangles.
  */
 
 #define TESSELLATOR_WIREFRAME 0
 
 namespace GrTessellator {
 
 class VertexAllocator {
 public:
+    VertexAllocator(size_t stride) : fStride(stride) {}
     virtual ~VertexAllocator() {}
-    virtual SkPoint* lock(int vertexCount) = 0;
+    virtual void* lock(int vertexCount) = 0;
     virtual void unlock(int actualCount) = 0;
+    size_t stride() const { return fStride; }
+private:
+    size_t fStride;
 };
 
 struct WindingVertex {
     SkPoint fPos;
     int fWinding;
 };
 
 // Triangulates a path to an array of vertices. Each triangle is represented as a set of three
 // WindingVertex entries, each of which contains the position and winding count (which is the same
 // for all three vertices of a triangle). The 'verts' out parameter is set to point to the resultant
 // vertex array. CALLER IS RESPONSIBLE for deleting this buffer to avoid a memory leak!
 int PathToVertices(const SkPath& path, SkScalar tolerance, const SkRect& clipBounds,
                    WindingVertex** verts);
 
-int PathToTriangles(const SkPath& path, SkScalar tolerance, const SkRect& clipBounds,
-                    VertexAllocator*, bool *isLinear);
+int PathToTriangles(const SkPath& path, SkScalar tolerance, const SkRect& clipBounds, 
+                    VertexAllocator*, bool antialias, const GrColor& color,
+                    bool canTweakAlphaForCoverage, bool *isLinear);
 }
 
 #endif