| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /** |
| * @author Igor V. Stolyarov |
| * @version $Revision$ |
| */ |
| package java.awt.image; |
| |
| import java.awt.BufferCapabilities; |
| import java.awt.Graphics; |
| |
| /** |
| * The BufferStrategy abstract class provides an opportunity |
| * to organize the buffers for a Canvas or Window. The BufferStrategy |
| * implementation depends on hardware and software limitations. |
| * These limitations are detectible through the capabilities |
| * object which can be obtained by the GraphicsConfiguration of the Canvas |
| * or Window. |
| */ |
| public abstract class BufferStrategy { |
| |
| /** |
| * Returns true if the drawing buffer was lost since the last call |
| * of getDrawGraphics. |
| * |
| * @return true if the drawing buffer was lost since the last call |
| * of getDrawGraphics, false otherwise. |
| */ |
| public abstract boolean contentsLost(); |
| |
| /** |
| * Returns true if the drawing buffer is restored from a lost state. |
| * |
| * @return true if the drawing buffer is restored from a lost state, |
| * false otherwise. |
| */ |
| public abstract boolean contentsRestored(); |
| |
| /** |
| * Gets the BufferCapabilities of BufferStrategy. |
| * |
| * @return the BufferCapabilities of BufferStrategy. |
| */ |
| public abstract BufferCapabilities getCapabilities(); |
| |
| /** |
| * Gets the Graphics object to use to draw to the buffer. |
| * |
| * @return the Graphics object to use to draw to the buffer. |
| */ |
| public abstract Graphics getDrawGraphics(); |
| |
| /** |
| * Shows the next available buffer. |
| */ |
| public abstract void show(); |
| |
| } |