1*91c99ff4SAndrew Rist /************************************************************** 2cdf0e10cSrcweir * 3*91c99ff4SAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 4*91c99ff4SAndrew Rist * or more contributor license agreements. See the NOTICE file 5*91c99ff4SAndrew Rist * distributed with this work for additional information 6*91c99ff4SAndrew Rist * regarding copyright ownership. The ASF licenses this file 7*91c99ff4SAndrew Rist * to you under the Apache License, Version 2.0 (the 8*91c99ff4SAndrew Rist * "License"); you may not use this file except in compliance 9*91c99ff4SAndrew Rist * with the License. You may obtain a copy of the License at 10*91c99ff4SAndrew Rist * 11*91c99ff4SAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0 12*91c99ff4SAndrew Rist * 13*91c99ff4SAndrew Rist * Unless required by applicable law or agreed to in writing, 14*91c99ff4SAndrew Rist * software distributed under the License is distributed on an 15*91c99ff4SAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*91c99ff4SAndrew Rist * KIND, either express or implied. See the License for the 17*91c99ff4SAndrew Rist * specific language governing permissions and limitations 18*91c99ff4SAndrew Rist * under the License. 19*91c99ff4SAndrew Rist * 20*91c99ff4SAndrew Rist *************************************************************/ 21*91c99ff4SAndrew Rist 22*91c99ff4SAndrew Rist 23cdf0e10cSrcweir 24cdf0e10cSrcweir #ifndef _VCLCANVAS_OUTDEVPROVIDER_HXX 25cdf0e10cSrcweir #define _VCLCANVAS_OUTDEVPROVIDER_HXX 26cdf0e10cSrcweir 27cdf0e10cSrcweir #include <sal/types.h> 28cdf0e10cSrcweir #include <boost/shared_ptr.hpp> 29cdf0e10cSrcweir 30cdf0e10cSrcweir 31cdf0e10cSrcweir class OutputDevice; 32cdf0e10cSrcweir 33cdf0e10cSrcweir namespace vclcanvas 34cdf0e10cSrcweir { 35cdf0e10cSrcweir /* Definition of OutDevProvider interface */ 36cdf0e10cSrcweir 37cdf0e10cSrcweir /** Implementers of this interface provide the CanvasHelper 38cdf0e10cSrcweir with its OutputDevice. 39cdf0e10cSrcweir 40cdf0e10cSrcweir This additional level of indirection was necessary, as the 41cdf0e10cSrcweir OutputDevice is not an interface. There had to be a mechanism 42cdf0e10cSrcweir to detect the moment when an OutputDevice is rendered to 43cdf0e10cSrcweir (e.g. for the BitmapBackBuffer). 44cdf0e10cSrcweir */ 45cdf0e10cSrcweir class OutDevProvider 46cdf0e10cSrcweir { 47cdf0e10cSrcweir public: ~OutDevProvider()48cdf0e10cSrcweir virtual ~OutDevProvider() {} 49cdf0e10cSrcweir 50cdf0e10cSrcweir virtual OutputDevice& getOutDev() = 0; 51cdf0e10cSrcweir virtual const OutputDevice& getOutDev() const = 0; 52cdf0e10cSrcweir }; 53cdf0e10cSrcweir 54cdf0e10cSrcweir typedef ::boost::shared_ptr< OutDevProvider > OutDevProviderSharedPtr; 55cdf0e10cSrcweir } 56cdf0e10cSrcweir 57cdf0e10cSrcweir #endif /* _VCLCANVAS_OUTDEVPROVIDER_HXX */ 58