1 /*
   2  * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any

 116  *         // Display the buffer
 117  *         strategy.show();
 118  *
 119  *         // Repeat the rendering if the drawing buffer was lost
 120  *     } while (strategy.contentsLost());
 121  * }
 122  *
 123  * // Dispose the window
 124  * w.setVisible(false);
 125  * w.dispose();
 126  * </code></pre>
 127  *
 128  * @see java.awt.Window
 129  * @see java.awt.Canvas
 130  * @see java.awt.GraphicsConfiguration
 131  * @see VolatileImage
 132  * @author Michael Martak
 133  * @since 1.4
 134  */
 135 public abstract class BufferStrategy {





 136 
 137     /**
 138      * Returns the {@code BufferCapabilities} for this
 139      * {@code BufferStrategy}.
 140      *
 141      * @return the buffering capabilities of this strategy
 142      */
 143     public abstract BufferCapabilities getCapabilities();
 144 
 145     /**
 146      * Creates a graphics context for the drawing buffer.  This method may not
 147      * be synchronized for performance reasons; use of this method by multiple
 148      * threads should be handled at the application level.  Disposal of the
 149      * graphics object obtained must be handled by the application.
 150      *
 151      * @return a graphics context for the drawing buffer
 152      */
 153     public abstract Graphics getDrawGraphics();
 154 
 155     /**

   1 /*
   2  * Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any

 116  *         // Display the buffer
 117  *         strategy.show();
 118  *
 119  *         // Repeat the rendering if the drawing buffer was lost
 120  *     } while (strategy.contentsLost());
 121  * }
 122  *
 123  * // Dispose the window
 124  * w.setVisible(false);
 125  * w.dispose();
 126  * </code></pre>
 127  *
 128  * @see java.awt.Window
 129  * @see java.awt.Canvas
 130  * @see java.awt.GraphicsConfiguration
 131  * @see VolatileImage
 132  * @author Michael Martak
 133  * @since 1.4
 134  */
 135 public abstract class BufferStrategy {
 136 
 137     /**
 138      * Constructor for subclasses to call.
 139      */
 140     public BufferStrategy() {}
 141 
 142     /**
 143      * Returns the {@code BufferCapabilities} for this
 144      * {@code BufferStrategy}.
 145      *
 146      * @return the buffering capabilities of this strategy
 147      */
 148     public abstract BufferCapabilities getCapabilities();
 149 
 150     /**
 151      * Creates a graphics context for the drawing buffer.  This method may not
 152      * be synchronized for performance reasons; use of this method by multiple
 153      * threads should be handled at the application level.  Disposal of the
 154      * graphics object obtained must be handled by the application.
 155      *
 156      * @return a graphics context for the drawing buffer
 157      */
 158     public abstract Graphics getDrawGraphics();
 159 
 160     /**