michael@0: 
michael@0: /*
michael@0:  * Copyright 2011 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: #ifndef SkEdgeBuilder_DEFINED
michael@0: #define SkEdgeBuilder_DEFINED
michael@0: 
michael@0: #include "SkChunkAlloc.h"
michael@0: #include "SkRect.h"
michael@0: #include "SkTDArray.h"
michael@0: 
michael@0: struct SkEdge;
michael@0: class SkEdgeClipper;
michael@0: class SkPath;
michael@0: 
michael@0: class SkEdgeBuilder {
michael@0: public:
michael@0:     SkEdgeBuilder();
michael@0: 
michael@0:     // returns the number of built edges. The array of those edge pointers
michael@0:     // is returned from edgeList().
michael@0:     int build(const SkPath& path, const SkIRect* clip, int shiftUp);
michael@0: 
michael@0:     SkEdge** edgeList() { return fEdgeList; }
michael@0: 
michael@0: private:
michael@0:     SkChunkAlloc        fAlloc;
michael@0:     SkTDArray<SkEdge*>  fList;
michael@0: 
michael@0:     /*
michael@0:      *  If we're in general mode, we allcoate the pointers in fList, and this
michael@0:      *  will point at fList.begin(). If we're in polygon mode, fList will be
michael@0:      *  empty, as we will have preallocated room for the pointers in fAlloc's
michael@0:      *  block, and fEdgeList will point into that.
michael@0:      */
michael@0:     SkEdge**            fEdgeList;
michael@0: 
michael@0:     int                 fShiftUp;
michael@0: 
michael@0: public:
michael@0:     void addLine(const SkPoint pts[]);
michael@0:     void addQuad(const SkPoint pts[]);
michael@0:     void addCubic(const SkPoint pts[]);
michael@0:     void addClipper(SkEdgeClipper*);
michael@0: 
michael@0:     int buildPoly(const SkPath& path, const SkIRect* clip, int shiftUp);
michael@0: };
michael@0: 
michael@0: #endif