1 files changed, 175 insertions, 0 deletions
diff --git a/libjava/gnu/awt/xlib/XOffScreenImage.java b/libjava/gnu/awt/xlib/XOffScreenImage.java
new file mode 100644
index 00000000000..71791c1be5f
--- /dev/null
+++ b/libjava/gnu/awt/xlib/XOffScreenImage.java
@@ -0,0 +1,175 @@
+/* Copyright (C) 2000, 2003  Free Software Foundation
+ 
+   This file is part of libgcj.
+ 
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.awt.xlib;
+
+import java.awt.Image;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.GraphicsConfiguration;
+import java.awt.image.ColorModel;
+import java.awt.image.ImageObserver;
+import java.awt.image.ImageProducer;
+import java.util.Hashtable;
+import gnu.awt.j2d.DirectRasterGraphics;
+import gnu.awt.j2d.Graphics2DImpl;
+import gnu.awt.j2d.IntegerGraphicsState;
+import gnu.gcj.xlib.Drawable;
+import gnu.gcj.xlib.Pixmap;
+import gnu.gcj.xlib.Screen;
+import gnu.gcj.xlib.Visual;
+
+/** Image class for xlib off-screen buffers.
+ * The image is stored in a server-side pixmap for best performance.
+ * This class supports getGraphics, so you can draw on the pixmap, and is
+ * specially handled when doing drawImage, so that the image copy is done
+ * entirely in the X server.
+ * This class does not support rasterization, for which you'd need an XImage.
+ *
+ * @author  scott gilbertson <scottg@mantatest.com> <sgilbertson@cogeco.ca>
+ */
+public class XOffScreenImage extends Image 
+                             implements IntegerGraphicsState.ScreenCoupledImage
+{
+  private Pixmap pixmap;
+  private XGraphicsConfiguration config;
+  private int width;
+  private int height;
+  
+  /** Create a new XOffScreenImage
+   * @param config Graphics configuration, to compare against on-screen 
+   *               components and to create the appropriate Graphics
+   * @param drawable The drawable with which the image is compatible
+   * @param width The width of the image
+   * @param height The height of the image
+   */
+  XOffScreenImage (XGraphicsConfiguration config, Drawable drawable, int width, int height)
+  {
+    this.config = config;
+    this.width = width;
+    this.height = height;
+    pixmap = new Pixmap (drawable, width, height, drawable.getDepth ());
+  }
+  
+  /** Get the pixmap which contains this image
+   * @return The pixmap
+   */
+  public Pixmap getPixmap ()
+  {
+    return pixmap;
+  }
+  
+  /** Flushes (that is, destroys) any resources used for this image.  This
+   * includes the actual image data.
+   */
+  public void flush ()
+  {
+    // FIXME: should dispose pixmap
+    pixmap = null;
+  }
+  
+  /** Returns a graphics context object for drawing an off-screen object.
+   * This method is only valid for off-screen objects.
+   *
+   * @return a graphics context object for an off-screen object
+   * @see Graphics#createImage(int, int)
+   */
+  public Graphics getGraphics ()
+  {
+    DirectRasterGraphics gfxDevice = new XGraphics (pixmap, config);
+    IntegerGraphicsState igState = new IntegerGraphicsState (gfxDevice);
+    Graphics2DImpl gfx2d = new Graphics2DImpl (config);
+    gfx2d.setState (igState);
+    return gfx2d;
+  }
+  
+  /** Returns the height of the image, or -1 if it is unknown.  If the
+   * image height is unknown, the observer object will be notified when
+   * the value is known.
+   *
+   * @param observer the image observer for this object
+   * @return the height in pixels
+   * @see #getWidth(ImageObserver)
+   */
+  public int getHeight (ImageObserver observer)
+  {
+    return height;
+  }
+  
+  /** Returns the height of the image, or -1 if it is unknown.  If the
+   * image height is unknown, the observer object will be notified when
+   * the value is known.
+   *
+   * @return the height in pixels
+   * @see #getWidth()
+   */
+  public int getHeight ()
+  {
+    return height;
+  }
+  
+  /** Returns the image producer object for this object. The producer is the
+   * object which generates pixels for this image.
+   *
+   * @return the image producer for this object
+   */
+  public ImageProducer getSource ()
+  {
+    throw new UnsupportedOperationException ("getSource not supported");
+  }
+  
+  /** Returns the width of the image, or -1 if it is unknown.  If the
+   * image width is unknown, the observer object will be notified when
+   * the value is known.
+   *
+   * @param observer the image observer for this object
+   * @return the width in pixels
+   * @see #getHeight(ImageObserver)
+   */
+  public int getWidth (ImageObserver observer)
+  {
+    return width;
+  }
+  
+  /** Returns the width of the image, or -1 if it is unknown.  If the
+   * image width is unknown, the observer object will be notified when
+   * the value is known.
+   *
+   * @return the width in pixels
+   * @see #getHeight()
+   */
+  public int getWidth ()
+  {
+    return width;
+  }
+
+  /** This method requests a named property for an object.  The value of the
+   * property is returned. The value <code>UndefinedProperty</code> is
+   * returned if there is no property with the specified name.  The value
+   * <code>null</code> is returned if the properties for the object are
+   * not yet known.  In this case, the specified image observer is notified
+   * when the properties are known.
+   *
+   * @param name the requested property name
+   * @param observer the image observer for this object
+   * @return the named property, if available
+   * @see #UndefinedProperty
+   */
+  public Object getProperty (String name, ImageObserver observer)
+  {
+    return null;
+  }
+  
+  /** Get the GraphicsConfiguration to which this image is coupled
+   * @return the GraphicsConfiguration
+   */
+  public GraphicsConfiguration getGraphicsConfiguration ()
+  {
+    return config;
+  }
+}