1 2 /* 3 * Copyright 2006 The Android Open Source Project 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #ifndef SkLayerRasterizer_DEFINED 11 #define SkLayerRasterizer_DEFINED 12 13 #include "SkRasterizer.h" 14 #include "SkDeque.h" 15 #include "SkScalar.h" 16 17 class SkPaint; 18 19 class SkLayerRasterizer : public SkRasterizer { 20 public: 21 SkLayerRasterizer(); 22 virtual ~SkLayerRasterizer(); 23 24 void addLayer(const SkPaint& paint) { 25 this->addLayer(paint, 0, 0); 26 } 27 28 /** Add a new layer (above any previous layers) to the rasterizer. 29 The layer will extract those fields that affect the mask from 30 the specified paint, but will not retain a reference to the paint 31 object itself, so it may be reused without danger of side-effects. 32 */ 33 void addLayer(const SkPaint& paint, SkScalar dx, SkScalar dy); 34 35 // overrides from SkFlattenable 36 virtual Factory getFactory(); 37 virtual void flatten(SkFlattenableWriteBuffer&); 38 39 static SkFlattenable* CreateProc(SkFlattenableReadBuffer&); 40 41 SK_DECLARE_FLATTENABLE_REGISTRAR() 42 43 protected: 44 SkLayerRasterizer(SkFlattenableReadBuffer&); 45 46 // override from SkRasterizer 47 virtual bool onRasterize(const SkPath& path, const SkMatrix& matrix, 48 const SkIRect* clipBounds, 49 SkMask* mask, SkMask::CreateMode mode); 50 51 private: 52 SkDeque fLayers; 53 54 typedef SkRasterizer INHERITED; 55 }; 56 57 #endif 58
