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 /*

  * Copyright 2011 Google Inc.

  *

  * Use of this source code is governed by a BSD-style license that can be

  * found in the LICENSE file.

  */

 #ifndef SkEdgeBuilder_DEFINED

 #define SkEdgeBuilder_DEFINED

 #include "SkChunkAlloc.h"

 #include "SkRect.h"

 #include "SkTDArray.h"

 struct SkEdge;

 class SkEdgeClipper;

 class SkPath;

 class SkEdgeBuilder {

 public:

     SkEdgeBuilder();

     // returns the number of built edges. The array of those edge pointers

     // is returned from edgeList().

     int build(const SkPath& path, const SkIRect* clip, int shiftUp);

     SkEdge** edgeList() { return fEdgeList; }

 private:

     SkChunkAlloc        fAlloc;

     SkTDArray<SkEdge*>  fList;

     /*

      *  If we're in general mode, we allcoate the pointers in fList, and this

      *  will point at fList.begin(). If we're in polygon mode, fList will be

      *  empty, as we will have preallocated room for the pointers in fAlloc's

      *  block, and fEdgeList will point into that.

      */

     SkEdge**            fEdgeList;

     int                 fShiftUp;

 public:

     void addLine(const SkPoint pts[]);

     void addQuad(const SkPoint pts[]);

     void addCubic(const SkPoint pts[]);

     void addClipper(SkEdgeClipper*);

     int buildPoly(const SkPath& path, const SkIRect* clip, int shiftUp);

 };

 #endif