1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SkLayerRasterizer_DEFINED 18 #define SkLayerRasterizer_DEFINED 19 20 #include "SkRasterizer.h" 21 #include "SkDeque.h" 22 #include "SkScalar.h" 23 24 class SkPaint; 25 26 class SkLayerRasterizer : public SkRasterizer { 27 public: 28 SkLayerRasterizer(); 29 virtual ~SkLayerRasterizer(); 30 31 void addLayer(const SkPaint& paint) 32 { 33 this->addLayer(paint, 0, 0); 34 } 35 36 /** Add a new layer (above any previous layers) to the rasterizer. 37 The layer will extract those fields that affect the mask from 38 the specified paint, but will not retain a reference to the paint 39 object itself, so it may be reused without danger of side-effects. 40 */ 41 void addLayer(const SkPaint& paint, SkScalar dx, SkScalar dy); 42 43 // overrides from SkFlattenable 44 virtual Factory getFactory(); 45 virtual void flatten(SkFlattenableWriteBuffer&); 46 47 protected: 48 SkLayerRasterizer(SkFlattenableReadBuffer&); 49 50 // override from SkRasterizer 51 virtual bool onRasterize(const SkPath& path, const SkMatrix& matrix, 52 const SkIRect* clipBounds, 53 SkMask* mask, SkMask::CreateMode mode); 54 55 private: 56 SkDeque fLayers; 57 58 static SkFlattenable* CreateProc(SkFlattenableReadBuffer&); 59 60 typedef SkRasterizer INHERITED; 61 }; 62 63 #endif 64
