3 files changed, 30 insertions, 0 deletions
diff --git a/src/nativewindow/classes/com/sun/nativewindow/impl/NullWindow.java b/src/nativewindow/classes/com/sun/nativewindow/impl/NullWindow.java
index c7d2acec0..48a04a3c9 100644
--- a/src/nativewindow/classes/com/sun/nativewindow/impl/NullWindow.java
+++ b/src/nativewindow/classes/com/sun/nativewindow/impl/NullWindow.java
@@ -88,6 +88,12 @@ public class NullWindow implements NativeWindow {
     return lockedStack;
   }
 
+  public boolean surfaceSwap() {
+    return false;
+  }
+
+  public void surfaceUpdated() { }
+
   public long getDisplayHandle() {
     return displayHandle;
   }
diff --git a/src/nativewindow/classes/com/sun/nativewindow/impl/jawt/JAWTWindow.java b/src/nativewindow/classes/com/sun/nativewindow/impl/jawt/JAWTWindow.java
index a4a529c54..5ad2804c1 100644
--- a/src/nativewindow/classes/com/sun/nativewindow/impl/jawt/JAWTWindow.java
+++ b/src/nativewindow/classes/com/sun/nativewindow/impl/jawt/JAWTWindow.java
@@ -115,6 +115,12 @@ public abstract class JAWTWindow implements NativeWindow {
     return lockedStack;
   }
 
+  public boolean surfaceSwap() {
+    return false;
+  }
+
+  public void surfaceUpdated() { }
+
   public long getDisplayHandle() {
     return config.getScreen().getDevice().getHandle();
   }
diff --git a/src/nativewindow/classes/javax/media/nativewindow/NativeWindow.java b/src/nativewindow/classes/javax/media/nativewindow/NativeWindow.java
index 2a9782c12..6a588538d 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/NativeWindow.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/NativeWindow.java
@@ -111,6 +111,24 @@ public interface NativeWindow {
    */
   public Exception getLockedStack();
 
+  /**
+   * Provide a mechanism to utilize custom (pre-) swap surface
+   * code. This method is called before the render toolkit (e.g. JOGL) 
+   * swaps the buffer/surface. The implementation may itself apply the swapping,
+   * in which case true shall be returned.
+   *
+   * @return true if this method completed swapping the surface,
+   *         otherwise false, in which case eg the GLDrawable 
+   *         implementation has to swap the code.
+   */
+  public boolean surfaceSwap();
+
+  /**
+   * Method invoked after the render toolkit (e.g. JOGL)
+   * swapped/changed the buffer/surface.
+   */
+  public void    surfaceUpdated();
+
   /** 
    * render all native window information invalid,
    * as if the native window was destroyed