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+/*
+ * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * - Redistribution of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ * - Redistribution in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * 
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * This software is provided "AS IS," without a warranty of any kind. ALL
+ * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
+ * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
+ * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
+ * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
+ * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
+ * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ * 
+ * You acknowledge that this software is not designed or intended for use
+ * in the design, construction, operation or maintenance of any nuclear
+ * facility.
+ * 
+ * Sun gratefully acknowledges that this software was originally authored
+ * and developed by Kenneth Bradley Russell and Christopher John Kline.
+ */
+
+package javax.media.opengl;
+
+import javax.media.nativewindow.*;
+
+/** An abstraction for an OpenGL rendering target. A GLDrawable's
+    primary functionality is to create OpenGL contexts which can be
+    used to perform rendering. A GLDrawable does not automatically
+    create an OpenGL context, but all implementations of {@link
+    GLAutoDrawable} do so upon creation. */
+
+public interface GLDrawable {
+  /**
+   * Creates a new context for drawing to this drawable that will
+   * optionally share display lists and other server-side OpenGL
+   * objects with the specified GLContext. <P>
+   *
+   * The GLContext <code>share</code> need not be associated with this
+   * GLDrawable and may be null if sharing of display lists and other
+   * objects is not desired. See the note in the overview
+   * documentation on
+   * <a href="../../../overview-summary.html#SHARING">context sharing</a>.
+   */
+  public GLContext createContext(GLContext shareWith);
+
+  /**
+   * Indicates to on-screen GLDrawable implementations whether the
+   * underlying window has been created and can be drawn into. End
+   * users do not need to call this method; it is not necessary to
+   * call <code>setRealized</code> on a GLCanvas, a GLJPanel, or a
+   * GLPbuffer, as these perform the appropriate calls on their
+   * underlying GLDrawables internally.
+   *
+   * <P>
+   *
+   * Developers implementing new OpenGL components for various window
+   * toolkits need to call this method against GLDrawables obtained
+   * from the GLDrawableFactory via the {@link
+   * GLDrawableFactory#getGLDrawable
+   * GLDrawableFactory.getGLDrawable()} method. It must typically be
+   * called with an argument of <code>true</code> when the component
+   * associated with the GLDrawable is realized and with an argument
+   * of <code>false</code> just before the component is unrealized.
+   * For the AWT, this means calling <code>setRealized(true)</code> in
+   * the <code>addNotify</code> method and with an argument of
+   * <code>false</code> in the <code>removeNotify</code> method.
+   *
+   * <P>
+   *
+   * <code>GLDrawable</code> implementations should handle multiple
+   * cycles of <code>setRealized(true)</code> /
+   * <code>setRealized(false)</code> calls. Most, if not all, Java
+   * window toolkits have a persistent object associated with a given
+   * component, regardless of whether that component is currently
+   * realized. The <CODE>GLDrawable</CODE> object associated with a
+   * particular component is intended to be similarly persistent. A
+   * <CODE>GLDrawable</CODE> is intended to be created for a given
+   * component when it is constructed and live as long as that
+   * component. <code>setRealized</code> allows the
+   * <code>GLDrawable</code> to re-initialize and destroy any
+   * associated resources as the component becomes realized and
+   * unrealized, respectively.
+   *
+   * <P>
+   *
+   * With an argument of <code>true</code>, 
+   * the minimum implementation shall call 
+   * {@link NativeWindow#lockSurface() NativeWindow's lockSurface()} and if successfull:
+   * <ul>
+   *    <li> Update the {@link GLCapabilities}, which are associated with 
+   *         the attached {@link NativeWindow}'s {@link AbstractGraphicsConfiguration}.</li>
+   *    <li> Release the lock with {@link NativeWindow#unlockSurface() NativeWindow's unlockSurface()}.</li>
+   * </ul><br>
+   * This is important since {@link NativeWindow#lockSurface() NativeWindow's lockSurface()}
+   * ensures resolving the window/surface handles, and the drawable's {@link GLCapabilities}
+   * might have changed.
+   *
+   * <P>
+   *
+   * Calling this method has no other effects. For example, if
+   * <code>removeNotify</code> is called on a Canvas implementation
+   * for which a GLDrawable has been created, it is also necessary to
+   * destroy all OpenGL contexts associated with that GLDrawable. This
+   * is not done automatically by the implementation.
+   */
+  public void setRealized(boolean realized);
+
+  /** Returns the current width of this GLDrawable. */
+  public int getWidth();
+
+  /** Returns the current height of this GLDrawable. */
+  public int getHeight();
+
+  /** Swaps the front and back buffers of this drawable. For {@link
+      GLAutoDrawable} implementations, when automatic buffer swapping
+      is enabled (as is the default), this method is called
+      automatically and should not be called by the end user. */
+  public void swapBuffers() throws GLException;
+
+  /** Fetches the {@link GLCapabilities} corresponding to the chosen
+      OpenGL capabilities (pixel format / visual / GLProfile) for this drawable.<br>
+      On some platforms, the pixel format is not directly associated
+      with the drawable; a best attempt is made to return a reasonable
+      value in this case. <br>
+      This object shall be directly associated to the attached {@link NativeWindow}'s 
+      {@link AbstractGraphicsConfiguration}, and if changes are necessary,
+      they should reflect those as well.
+      @return A copy of the queried object.
+    */
+  public GLCapabilities getChosenGLCapabilities();
+
+  /** Fetches the {@link GLProfile} for this drawable.
+      Returns the GLProfile object, no copy.
+    */
+  public GLProfile getGLProfile();
+
+  public NativeWindow getNativeWindow();
+
+  public GLDrawableFactory getFactory();
+
+  public String toString();
+}