1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #ifndef _VCLCANVAS_BACKBUFFER_HXX_ 25 #define _VCLCANVAS_BACKBUFFER_HXX_ 26 27 #include <vcl/virdev.hxx> 28 29 #include <canvas/vclwrapper.hxx> 30 #include "outdevprovider.hxx" 31 32 #include <boost/shared_ptr.hpp> 33 34 35 namespace vclcanvas 36 { 37 /// Background buffer abstraction 38 class BackBuffer : public OutDevProvider 39 { 40 public: 41 /** Create a backbuffer for given reference device 42 43 @param bMonochromeBuffer 44 When false, default depth of reference device is 45 chosen. When true, the buffer will be monochrome, i.e. one 46 bit deep. 47 */ 48 BackBuffer( const OutputDevice& rRefDevice, 49 bool bMonochromeBuffer=false ); 50 51 virtual OutputDevice& getOutDev(); 52 virtual const OutputDevice& getOutDev() const; 53 54 void setSize( const ::Size& rNewSize ); 55 56 private: 57 ::canvas::vcltools::VCLObject<VirtualDevice> maVDev; 58 }; 59 60 typedef ::boost::shared_ptr< BackBuffer > BackBufferSharedPtr; 61 } 62 63 #endif /* #ifndef _VCLCANVAS_BACKBUFFER_HXX_ */ 64