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Diffstat (limited to 'libjava/java/awt/BufferCapabilities.java')
| -rw-r--r-- | libjava/java/awt/BufferCapabilities.java | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/libjava/java/awt/BufferCapabilities.java b/libjava/java/awt/BufferCapabilities.java deleted file mode 100644 index 7cc4973..0000000 --- a/libjava/java/awt/BufferCapabilities.java +++ /dev/null @@ -1,251 +0,0 @@ -/* BufferCapabilities.java -- double-buffering capabilities descriptor - Copyright (C) 2002, 2005 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package java.awt; - -/** - * A double-buffering capability descriptor. This class exposes - * details about the double-buffering algorithms used by image - * buffers. - * - * BufferCapabilities represents algorithms that involve at least two - * buffers but it can also specify so-called "multi-buffer" schemes - * involving more than two buffers. This class describes the - * capabilities of the front and back buffers as well as the results - * of "flipping" -- that is, what happens when an image is transferred - * from the back buffer to the front buffer. - * - * Flipping may or may not be supported or may be supported only in - * fullscreen mode. If it is not supported then "blitting" is implied - * -- that is, the contents of the back buffer are copied using a fast - * block transfer operation from the back buffer to the front buffer. - * - * The front buffer is the one that is displayed. - * - * @author Eric Blake (ebb9@email.byu.edu) - * - * @see BufferStrategy#getCapabilities() - * @see GraphicsConfiguration#getCapabilities() - * - * @since 1.4 - */ -public class BufferCapabilities implements Cloneable -{ - /** - * A type-safe enumeration of buffer flipping results. - * - * @see AttributeValue - */ - public static final class FlipContents extends AttributeValue - { - /** - * The names of the different flipping results. - */ - private static final String[] NAMES - = { "undefined", "background", "prior", "copied" }; - - /** - * The contents of the back buffer are undefined after flipping. - */ - public static final FlipContents UNDEFINED = new FlipContents(0); - - /** - * The back buffer is cleared with the background color after - * flipping. - */ - public static final FlipContents BACKGROUND = new FlipContents(1); - - /** - * The back buffer contains the pre-flipping contents of the front - * buffer after flipping. In other words a true "flip" has been - * performed. - */ - public static final FlipContents PRIOR = new FlipContents(2); - - /** - * The back buffer has the same contents as the front buffer after - * flipping. - */ - public static final FlipContents COPIED = new FlipContents(3); - - /** - * Create a new flipping result descriptor. - * - * @param value the enumeration value - */ - private FlipContents(int value) - { - super(value, NAMES); - } - } - - /** - * Front buffer capabilities descriptor. - */ - private final ImageCapabilities front; - - /** - * Back buffer capabilities descriptor. - */ - private final ImageCapabilities back; - - /** - * Describes the results of a "flip" operation. - */ - private final FlipContents flip; - - /** - * Creates a buffer capabilities object. - * - * @param frontCaps front buffer capabilities descriptor - * @param backCaps back buffer capabilities descriptor - * @param flip the results of a flip operation or null if - * flipping is not supported - * - * @exception IllegalArgumentException if frontCaps or backCaps is - * null - */ - public BufferCapabilities(ImageCapabilities frontCaps, - ImageCapabilities backCaps, - FlipContents flip) - { - if (frontCaps == null || backCaps == null) - throw new IllegalArgumentException(); - this.front = frontCaps; - this.back = backCaps; - this.flip = flip; - } - - /** - * Retrieve the front buffer's image capabilities. - * - * @return the front buffer's image capabilities - */ - public ImageCapabilities getFrontBufferCapabilities() - { - return front; - } - - /** - * Retrieve the back buffer's image capabilities. - * - * @return the back buffer's image capabilities - */ - public ImageCapabilities getBackBufferCapabilities() - { - return back; - } - - /** - * Return whether or not flipping is supported. - * - * @return true if flipping is supported, false otherwise - */ - public boolean isPageFlipping() - { - return flip != null; - } - - /** - * Retrieve the result of a flipping operation. If this method - * returns null then flipping is not supported. This implies that - * "blitting", a fast block transfer, is used to copy the contents - * of the back buffer to the front buffer. Other possible return - * values are: - * <ul> - * <li><code>FlipContents.UNDEFINED</code> the contents of the - * back buffer are undefined after flipping.</li> - * <li><code>FlipContents.BACKGROUND</code> the contents of the - * back buffer are cleared to the background color after - * flipping.</li> - * <li><code>FlipContents.PRIOR</code> the back buffer contains - * the pre-flipping contents of the front * buffer after - * flipping.</li> - * <li><code>FlipContents.COPIED</code> the back buffer has the - * same contents as the front buffer after flipping.</li> - * </ul> - * - * @return the result of a flipping operation or null if flipping is - * not supported - */ - public FlipContents getFlipContents() - { - return flip; - } - - /** - * Returns true if flipping is only supported in fullscreen mode. - * - * @return true if flipping is only supported in fullscreen mode, - * false otherwise - */ - public boolean isFullScreenRequired() - { - return true; - } - - /** - * Returns true if flipping can involve more than two buffers. One - * or more intermediate buffers may be available in addition to the - * front and back buffers. - * - * @return true if there are more than two buffers available for - * flipping, false otherwise - */ - public boolean isMultiBufferAvailable() - { - return false; - } - - /** - * Clone this buffering capability descriptor. - * - * @return a clone of this buffer capability descriptor - */ - public Object clone() - { - try - { - return super.clone(); - } - catch (CloneNotSupportedException e) - { - throw (Error) new InternalError().initCause(e); - } - } -} |