00001 /* 00002 * Copyright (C) 2008 The Android Open Source Project 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #ifndef SkPageFlipper_DEFINED 00018 #define SkPageFlipper_DEFINED 00019 00020 #include "SkRegion.h" 00021 00031 class SkPageFlipper { 00032 public: 00033 SkPageFlipper(); 00034 SkPageFlipper(int width, int height); 00035 00036 int width() const { return fWidth; } 00037 int height() const { return fHeight; } 00038 00039 void resize(int width, int height); 00040 00041 bool isDirty() const { return !fDirty1->isEmpty(); } 00042 const SkRegion& dirtyRgn() const { return *fDirty1; } 00043 00044 void inval(); 00045 void inval(const SkIRect&); 00046 void inval(const SkRegion&); 00047 void inval(const SkRect&, bool antialias); 00048 00058 const SkRegion& update(SkRegion* copyBits); 00059 00060 private: 00061 SkRegion* fDirty0; 00062 SkRegion* fDirty1; 00063 SkRegion fDirty0Storage; 00064 SkRegion fDirty1Storage; 00065 int fWidth; 00066 int fHeight; 00067 }; 00068 00069 #endif 00070