2005-05-06 Thomas Fitzsimmons <fitzsim@redhat.com>

	* Makefile.am (gtk_awt_peer_sources): Add GtkVolatileImage.java.
	* Makefile.in: Regenerate.
	* gnu/java/awt/peer/gtk/GdkGraphicsConfiguration.java
	(createCompatibleVolatileImage(int,int)): Implement.
	(createCompatibleVolatileImage(int,int,ImageCapabilities)):
	Likewise.
	* gnu/java/awt/peer/gtk/GtkComponentPeer.java (backBuffer, caps):
	New fields.
	(createVolatileImage): Implement.
	(createBuffers): Likewise.
	(getBackBuffer): Likewise.
	(flip): Likewise.
	(destroyBuffers): Likewise.
	* gnu/java/awt/peer/gtk/GtkVolatileImage.java: New file.
	* java/awt/Canvas.java (CanvasBltBufferStrategy): New class.
	(CanvasFlipBufferStrategy): Likewise.
	(createBufferStrategy(int)): New method.
	(createBufferStrategy(int,BufferCapabilities)): Likewise.
	* java/awt/Component.java (BltBufferStrategy): Implement and
	document class.
	(FlipBufferStrategy): Likewise.
	* java/awt/Window.java (WindowBltBufferStrategy): New class.
	(WindowFlipBufferStrategy): Likewise.
	(createBufferStrategy(int)): New method.
	(createBufferStrategy(int,BufferCapabilities)): Likewise.
	(getBufferStrategy): Likewise.
	* java/awt/BufferCapabilities.java (BufferCapabilities): Rename
	front to frontCaps and back to backCaps.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@99336 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 52 insertions, 3 deletions

diff --git a/libjava/java/awt/peer/ComponentPeer.java b/libjava/java/awt/peer/ComponentPeer.java
index 077690433e9..95c7832fd77 100644
--- a/libjava/java/awt/peer/ComponentPeer.java
+++ b/libjava/java/awt/peer/ComponentPeer.java
@@ -128,11 +128,60 @@ public interface ComponentPeer
   boolean canDetermineObscurity();
   void coalescePaintEvent(PaintEvent e);
   void updateCursorImmediately();
-  VolatileImage createVolatileImage(int width, int height);
   boolean handlesWheelScrolling();
-  void createBuffers(int x, BufferCapabilities capabilities) throws AWTException;
+
+  /**
+   * A convenience method that creates a volatile image.  The volatile
+   * image is created on the screen device on which this component is
+   * displayed, in the device's current graphics configuration.
+   *
+   * @param width width of the image
+   * @param height height of the image
+   *
+   * @see VolatileImage
+   *
+   * @since 1.2
+   */
+  VolatileImage createVolatileImage(int width, int height);
+
+  /**
+   * Create a number of image buffers that implement a buffering
+   * strategy according to the given capabilities.
+   *
+   * @param numBuffers the number of buffers
+   * @param caps the buffering capabilities
+   *
+   * @throws AWTException if the specified buffering strategy is not
+   * implemented
+   *
+   * @since 1.2
+   */
+  void createBuffers(int numBuffers, BufferCapabilities caps)
+    throws AWTException;
+
+  /**
+   * Return the back buffer of this component.
+   *
+   * @return the back buffer of this component.
+   *
+   * @since 1.2
+   */
   Image getBackBuffer();
+
+  /**
+   * Perform a page flip, leaving the contents of the back buffer in
+   * the specified state.
+   *
+   * @param contents the state in which to leave the back buffer
+   *
+   * @since 1.2
+   */
   void flip(BufferCapabilities.FlipContents contents);
+
+  /**
+   * Destroy the resources created by createBuffers.
+   *
+   * @since 1.2
+   */
   void destroyBuffers();
-  
 }