jdk/src/windows/classes/sun/awt/Win32GraphicsEnvironment.java - platform/libcore - Git at Google

 /*
  * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Sun designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Sun in the LICENSE file that accompanied this code.
  *
  * This code 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
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */

 package sun.awt;

 import java.awt.GraphicsConfiguration;
 import java.awt.GraphicsDevice;
 import java.awt.GraphicsEnvironment;
 import java.awt.Toolkit;
 import java.awt.peer.ComponentPeer;
 import java.io.File;
 import java.io.IOException;
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.ListIterator;
 import java.util.NoSuchElementException;
 import java.util.StringTokenizer;
 import sun.awt.DisplayChangedListener;
 import sun.awt.SunDisplayChanger;
 import sun.awt.windows.WFontConfiguration;
 import sun.awt.windows.WPrinterJob;
 import sun.awt.windows.WToolkit;
 import sun.font.FontManager;
 import sun.java2d.SunGraphicsEnvironment;
 import sun.java2d.SurfaceManagerFactory;
 import sun.java2d.WindowsSurfaceManagerFactory;
 import sun.java2d.d3d.D3DGraphicsDevice;
 import sun.java2d.windows.WindowsFlags;

 /**
  * This is an implementation of a GraphicsEnvironment object for the
  * default local GraphicsEnvironment used by the Java Runtime Environment
  * for Windows.
  *
  * @see GraphicsDevice
  * @see GraphicsConfiguration
  */

 public class Win32GraphicsEnvironment
     extends SunGraphicsEnvironment
 {
     static {
         // Ensure awt is loaded already.  Also, this forces static init
         // of WToolkit and Toolkit, which we depend upon
         WToolkit.loadLibraries();
         // setup flags before initializing native layer
         WindowsFlags.initFlags();
         initDisplayWrapper();
         eudcFontFileName = getEUDCFontFile();

         // Install correct surface manager factory.
         SurfaceManagerFactory.setInstance(new WindowsSurfaceManagerFactory());
     }

     /**
      * Noop function that just acts as an entry point for someone to force
      * a static initialization of this class.
      */
     public static void init() {}

     /**
      * Initializes native components of the graphics environment.  This
      * includes everything from the native GraphicsDevice elements to
      * the DirectX rendering layer.
      */
     private static native void initDisplay();

     private static boolean displayInitialized;      // = false;
     public static void initDisplayWrapper() {
         if (!displayInitialized) {
             displayInitialized = true;
             initDisplay();
         }
     }

     public Win32GraphicsEnvironment() {
     }

     protected native int getNumScreens();
     protected native int getDefaultScreen();

     public GraphicsDevice getDefaultScreenDevice() {
         return getScreenDevices()[getDefaultScreen()];
     }

     /**
      * Returns the number of pixels per logical inch along the screen width.
      * In a system with multiple display monitors, this value is the same for
      * all monitors.
      * @returns number of pixels per logical inch in X direction
      */
     public native int getXResolution();
     /**
      * Returns the number of pixels per logical inch along the screen height.
      * In a system with multiple display monitors, this value is the same for
      * all monitors.
      * @returns number of pixels per logical inch in Y direction
      */
     public native int getYResolution();


 /*
  * ----DISPLAY CHANGE SUPPORT----
  */

     // list of invalidated graphics devices (those which were removed)
     private ArrayList<WeakReference<Win32GraphicsDevice>> oldDevices;
     /*
      * From DisplayChangeListener interface.
      * Called from WToolkit and executed on the event thread when the
      * display settings are changed.
      */
     @Override
     public void displayChanged() {
         // getNumScreens() will return the correct current number of screens
         GraphicsDevice newDevices[] = new GraphicsDevice[getNumScreens()];
         GraphicsDevice oldScreens[] = screens;
         // go through the list of current devices and determine if they
         // could be reused, or will have to be replaced
         if (oldScreens != null) {
             for (int i = 0; i < oldScreens.length; i++) {
                 if (!(screens[i] instanceof Win32GraphicsDevice)) {
                     // REMIND: can we ever have anything other than Win32GD?
                     assert (false) : oldScreens[i];
                     continue;
                 }
                 Win32GraphicsDevice gd = (Win32GraphicsDevice)oldScreens[i];
                 // devices may be invalidated from the native code when the
                 // display change happens (device add/removal also causes a
                 // display change)
                 if (!gd.isValid()) {
                     if (oldDevices == null) {
                         oldDevices =
                             new ArrayList<WeakReference<Win32GraphicsDevice>>();
                     }
                     oldDevices.add(new WeakReference<Win32GraphicsDevice>(gd));
                 } else if (i < newDevices.length) {
                     // reuse the device
                     newDevices[i] = gd;
                 }
             }
             oldScreens = null;
         }
         // create the new devices (those that weren't reused)
         for (int i = 0; i < newDevices.length; i++) {
             if (newDevices[i] == null) {
                 newDevices[i] = makeScreenDevice(i);
             }
         }
         // install the new array of devices
         // Note: no synchronization here, it doesn't matter if a thread gets
         // a new or an old array this time around
         screens = newDevices;
         for (GraphicsDevice gd : screens) {
             if (gd instanceof DisplayChangedListener) {
                 ((DisplayChangedListener)gd).displayChanged();
             }
         }
         // re-invalidate all old devices. It's needed because those in the list
         // may become "invalid" again - if the current default device is removed,
         // for example. Also, they need to be notified about display
         // changes as well.
         if (oldDevices != null) {
             int defScreen = getDefaultScreen();
             for (ListIterator<WeakReference<Win32GraphicsDevice>> it =
                     oldDevices.listIterator(); it.hasNext();)
             {
                 Win32GraphicsDevice gd = it.next().get();
                 if (gd != null) {
                     gd.invalidate(defScreen);
                     gd.displayChanged();
                 } else {
                     // no more references to this device, remove it
                     it.remove();
                 }
             }
         }
         // Reset the static GC for the (possibly new) default screen
         WToolkit.resetGC();

         // notify SunDisplayChanger list (e.g. VolatileSurfaceManagers and
         // CachingSurfaceManagers) about the display change event
         displayChanger.notifyListeners();
         // note: do not call super.displayChanged, we've already done everything
     }


 /*
  * ----END DISPLAY CHANGE SUPPORT----
  */

     /* Used on Windows to obtain from the windows registry the name
      * of a file containing the system EUFC font. If running in one of
      * the locales for which this applies, and one is defined, the font
      * defined by this file is appended to all composite fonts as a
      * fallback component.
      */
     private static native String getEUDCFontFile();

     /**
      * Whether registerFontFile expects absolute or relative
      * font file names.
      */
     protected boolean useAbsoluteFontFileNames() {
         return false;
     }

     /* Unlike the shared code version, this expects a base file name -
      * not a full path name.
      * The font configuration file has base file names and the FontConfiguration
      * class reports these back to the GraphicsEnvironment, so these
      * are the componentFileNames of CompositeFonts.
      */
     protected void registerFontFile(String fontFileName, String[] nativeNames,
                                     int fontRank, boolean defer) {

         // REMIND: case compare depends on platform
         if (registeredFontFiles.contains(fontFileName)) {
             return;
         }
         registeredFontFiles.add(fontFileName);

         int fontFormat;
         if (ttFilter.accept(null, fontFileName)) {
             fontFormat = FontManager.FONTFORMAT_TRUETYPE;
         } else if (t1Filter.accept(null, fontFileName)) {
             fontFormat = FontManager.FONTFORMAT_TYPE1;
         } else {
             /* on windows we don't use/register native fonts */
             return;
         }

         if (fontPath == null) {
             fontPath = getPlatformFontPath(noType1Font);
         }

         /* Look in the JRE font directory first.
          * This is playing it safe as we would want to find fonts in the
          * JRE font directory ahead of those in the system directory
          */
         String tmpFontPath = jreFontDirName+File.pathSeparator+fontPath;
         StringTokenizer parser = new StringTokenizer(tmpFontPath,
                                                      File.pathSeparator);

         boolean found = false;
         try {
             while (!found && parser.hasMoreTokens()) {
                 String newPath = parser.nextToken();
                 boolean ujr = newPath.equals(jreFontDirName);
                 File theFile = new File(newPath, fontFileName);
                 if (theFile.canRead()) {
                     found = true;
                     String path = theFile.getAbsolutePath();
                     if (defer) {
                         FontManager.registerDeferredFont(fontFileName, path,
                                                          nativeNames,
                                                          fontFormat, ujr,
                                                          fontRank);
                     } else {
                         FontManager.registerFontFile(path, nativeNames,
                                                      fontFormat, ujr,
                                                      fontRank);
                     }
                     break;
                 }
             }
         } catch (NoSuchElementException e) {
             System.err.println(e);
         }
         if (!found) {
             addToMissingFontFileList(fontFileName);
         }
     }

     /* register only TrueType/OpenType fonts
      * Because these need to be registed just for use when printing,
      * we defer the actual registration and the static initialiser
      * for the printing class makes the call to registerJREFontsForPrinting()
      */
     static String fontsForPrinting = null;
     protected void registerJREFontsWithPlatform(String pathName) {
         fontsForPrinting = pathName;
     }

     public static void registerJREFontsForPrinting() {
         final String pathName;
         synchronized (Win32GraphicsEnvironment.class) {
             GraphicsEnvironment.getLocalGraphicsEnvironment();
             if (fontsForPrinting == null) {
                 return;
             }
             pathName = fontsForPrinting;
             fontsForPrinting = null;
         }
         java.security.AccessController.doPrivileged(
             new java.security.PrivilegedAction() {
                 public Object run() {
                     File f1 = new File(pathName);
                     String[] ls = f1.list(new TTFilter());
                     if (ls == null) {
                         return null;
                     }
                     for (int i=0; i <ls.length; i++ ) {
                         File fontFile = new File(f1, ls[i]);
                         registerFontWithPlatform(fontFile.getAbsolutePath());
                     }
                     return null;
                 }
          });
     }

     protected static native void registerFontWithPlatform(String fontName);

     protected static native void deRegisterFontWithPlatform(String fontName);

     protected GraphicsDevice makeScreenDevice(int screennum) {
         GraphicsDevice device = null;
         if (WindowsFlags.isD3DEnabled()) {
             device = D3DGraphicsDevice.createDevice(screennum);
         }
         if (device == null) {
             device = new Win32GraphicsDevice(screennum);
         }
         return device;
     }

     // Implements SunGraphicsEnvironment.createFontConfiguration.
     protected FontConfiguration createFontConfiguration() {
        FontConfiguration fc = new WFontConfiguration(this);
        fc.init();
        return fc;
     }

     public FontConfiguration createFontConfiguration(boolean preferLocaleFonts,
                                                      boolean preferPropFonts) {

         return new WFontConfiguration(this, preferLocaleFonts,preferPropFonts);
     }

     @Override
     public boolean isFlipStrategyPreferred(ComponentPeer peer) {
         GraphicsConfiguration gc;
         if (peer != null && (gc = peer.getGraphicsConfiguration()) != null) {
             GraphicsDevice gd = gc.getDevice();
             if (gd instanceof D3DGraphicsDevice) {
                 return ((D3DGraphicsDevice)gd).isD3DEnabledOnDevice();
             }
         }
         return false;
     }

     private static volatile boolean isDWMCompositionEnabled;
     /**
      * Returns true if dwm composition is currently enabled, false otherwise.
      *
      * @return true if dwm composition is enabled, false otherwise
      */
     public static boolean isDWMCompositionEnabled() {
         return isDWMCompositionEnabled;
     }

     /**
      * Called from the native code when DWM composition state changed.
      * May be called multiple times during the lifetime of the application.
      * REMIND: we may want to create a listener mechanism for this.
      *
      * Note: called on the Toolkit thread, no user code or locks are allowed.
      *
      * @param enabled indicates the state of dwm composition
      */
     private static void dwmCompositionChanged(boolean enabled) {
         isDWMCompositionEnabled = enabled;
     }

     @Override
     public boolean isDisplayLocal() {
         return true;
     }
 }
	/*
	* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Sun designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Sun in the LICENSE file that accompanied this code.
	*
	* This code 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
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
	* CA 95054 USA or visit www.sun.com if you need additional information or
	* have any questions.
	*/

	package sun.awt;

	import java.awt.GraphicsConfiguration;
	import java.awt.GraphicsDevice;
	import java.awt.GraphicsEnvironment;
	import java.awt.Toolkit;
	import java.awt.peer.ComponentPeer;
	import java.io.File;
	import java.io.IOException;
	import java.lang.ref.WeakReference;
	import java.util.ArrayList;
	import java.util.ListIterator;
	import java.util.NoSuchElementException;
	import java.util.StringTokenizer;
	import sun.awt.DisplayChangedListener;
	import sun.awt.SunDisplayChanger;
	import sun.awt.windows.WFontConfiguration;
	import sun.awt.windows.WPrinterJob;
	import sun.awt.windows.WToolkit;
	import sun.font.FontManager;
	import sun.java2d.SunGraphicsEnvironment;
	import sun.java2d.SurfaceManagerFactory;
	import sun.java2d.WindowsSurfaceManagerFactory;
	import sun.java2d.d3d.D3DGraphicsDevice;
	import sun.java2d.windows.WindowsFlags;

	/**
	* This is an implementation of a GraphicsEnvironment object for the
	* default local GraphicsEnvironment used by the Java Runtime Environment
	* for Windows.
	*
	* @see GraphicsDevice
	* @see GraphicsConfiguration
	*/

	public class Win32GraphicsEnvironment
	extends SunGraphicsEnvironment
	{
	static {
	// Ensure awt is loaded already. Also, this forces static init
	// of WToolkit and Toolkit, which we depend upon
	WToolkit.loadLibraries();
	// setup flags before initializing native layer
	WindowsFlags.initFlags();
	initDisplayWrapper();
	eudcFontFileName = getEUDCFontFile();

	// Install correct surface manager factory.
	SurfaceManagerFactory.setInstance(new WindowsSurfaceManagerFactory());
	}

	/**
	* Noop function that just acts as an entry point for someone to force
	* a static initialization of this class.
	*/
	public static void init() {}

	/**
	* Initializes native components of the graphics environment. This
	* includes everything from the native GraphicsDevice elements to
	* the DirectX rendering layer.
	*/
	private static native void initDisplay();

	private static boolean displayInitialized; // = false;
	public static void initDisplayWrapper() {
	if (!displayInitialized) {
	displayInitialized = true;
	initDisplay();
	}
	}

	public Win32GraphicsEnvironment() {
	}

	protected native int getNumScreens();
	protected native int getDefaultScreen();

	public GraphicsDevice getDefaultScreenDevice() {
	return getScreenDevices()[getDefaultScreen()];
	}

	/**
	* Returns the number of pixels per logical inch along the screen width.
	* In a system with multiple display monitors, this value is the same for
	* all monitors.
	* @returns number of pixels per logical inch in X direction
	*/
	public native int getXResolution();
	/**
	* Returns the number of pixels per logical inch along the screen height.
	* In a system with multiple display monitors, this value is the same for
	* all monitors.
	* @returns number of pixels per logical inch in Y direction
	*/
	public native int getYResolution();


	/*
	* ----DISPLAY CHANGE SUPPORT----
	*/

	// list of invalidated graphics devices (those which were removed)
	private ArrayList<WeakReference<Win32GraphicsDevice>> oldDevices;
	/*
	* From DisplayChangeListener interface.
	* Called from WToolkit and executed on the event thread when the
	* display settings are changed.
	*/
	@Override
	public void displayChanged() {
	// getNumScreens() will return the correct current number of screens
	GraphicsDevice newDevices[] = new GraphicsDevice[getNumScreens()];
	GraphicsDevice oldScreens[] = screens;
	// go through the list of current devices and determine if they
	// could be reused, or will have to be replaced
	if (oldScreens != null) {
	for (int i = 0; i < oldScreens.length; i++) {
	if (!(screens[i] instanceof Win32GraphicsDevice)) {
	// REMIND: can we ever have anything other than Win32GD?
	assert (false) : oldScreens[i];
	continue;
	}
	Win32GraphicsDevice gd = (Win32GraphicsDevice)oldScreens[i];
	// devices may be invalidated from the native code when the
	// display change happens (device add/removal also causes a
	// display change)
	if (!gd.isValid()) {
	if (oldDevices == null) {
	oldDevices =
	new ArrayList<WeakReference<Win32GraphicsDevice>>();
	}
	oldDevices.add(new WeakReference<Win32GraphicsDevice>(gd));
	} else if (i < newDevices.length) {
	// reuse the device
	newDevices[i] = gd;
	}
	}
	oldScreens = null;
	}
	// create the new devices (those that weren't reused)
	for (int i = 0; i < newDevices.length; i++) {
	if (newDevices[i] == null) {
	newDevices[i] = makeScreenDevice(i);
	}
	}
	// install the new array of devices
	// Note: no synchronization here, it doesn't matter if a thread gets
	// a new or an old array this time around
	screens = newDevices;
	for (GraphicsDevice gd : screens) {
	if (gd instanceof DisplayChangedListener) {
	((DisplayChangedListener)gd).displayChanged();
	}
	}
	// re-invalidate all old devices. It's needed because those in the list
	// may become "invalid" again - if the current default device is removed,
	// for example. Also, they need to be notified about display
	// changes as well.
	if (oldDevices != null) {
	int defScreen = getDefaultScreen();
	for (ListIterator<WeakReference<Win32GraphicsDevice>> it =
	oldDevices.listIterator(); it.hasNext();)
	{
	Win32GraphicsDevice gd = it.next().get();
	if (gd != null) {
	gd.invalidate(defScreen);
	gd.displayChanged();
	} else {
	// no more references to this device, remove it
	it.remove();
	}
	}
	}
	// Reset the static GC for the (possibly new) default screen
	WToolkit.resetGC();

	// notify SunDisplayChanger list (e.g. VolatileSurfaceManagers and
	// CachingSurfaceManagers) about the display change event
	displayChanger.notifyListeners();
	// note: do not call super.displayChanged, we've already done everything
	}


	/*
	* ----END DISPLAY CHANGE SUPPORT----
	*/

	/* Used on Windows to obtain from the windows registry the name
	* of a file containing the system EUFC font. If running in one of
	* the locales for which this applies, and one is defined, the font
	* defined by this file is appended to all composite fonts as a
	* fallback component.
	*/
	private static native String getEUDCFontFile();

	/**
	* Whether registerFontFile expects absolute or relative
	* font file names.
	*/
	protected boolean useAbsoluteFontFileNames() {
	return false;
	}

	/* Unlike the shared code version, this expects a base file name -
	* not a full path name.
	* The font configuration file has base file names and the FontConfiguration
	* class reports these back to the GraphicsEnvironment, so these
	* are the componentFileNames of CompositeFonts.
	*/
	protected void registerFontFile(String fontFileName, String[] nativeNames,
	int fontRank, boolean defer) {

	// REMIND: case compare depends on platform
	if (registeredFontFiles.contains(fontFileName)) {
	return;
	}
	registeredFontFiles.add(fontFileName);

	int fontFormat;
	if (ttFilter.accept(null, fontFileName)) {
	fontFormat = FontManager.FONTFORMAT_TRUETYPE;
	} else if (t1Filter.accept(null, fontFileName)) {
	fontFormat = FontManager.FONTFORMAT_TYPE1;
	} else {
	/* on windows we don't use/register native fonts */
	return;
	}

	if (fontPath == null) {
	fontPath = getPlatformFontPath(noType1Font);
	}

	/* Look in the JRE font directory first.
	* This is playing it safe as we would want to find fonts in the
	* JRE font directory ahead of those in the system directory
	*/
	String tmpFontPath = jreFontDirName+File.pathSeparator+fontPath;
	StringTokenizer parser = new StringTokenizer(tmpFontPath,
	File.pathSeparator);

	boolean found = false;
	try {
	while (!found && parser.hasMoreTokens()) {
	String newPath = parser.nextToken();
	boolean ujr = newPath.equals(jreFontDirName);
	File theFile = new File(newPath, fontFileName);
	if (theFile.canRead()) {
	found = true;
	String path = theFile.getAbsolutePath();
	if (defer) {
	FontManager.registerDeferredFont(fontFileName, path,
	nativeNames,
	fontFormat, ujr,
	fontRank);
	} else {
	FontManager.registerFontFile(path, nativeNames,
	fontFormat, ujr,
	fontRank);
	}
	break;
	}
	}
	} catch (NoSuchElementException e) {
	System.err.println(e);
	}
	if (!found) {
	addToMissingFontFileList(fontFileName);
	}
	}

	/* register only TrueType/OpenType fonts
	* Because these need to be registed just for use when printing,
	* we defer the actual registration and the static initialiser
	* for the printing class makes the call to registerJREFontsForPrinting()
	*/
	static String fontsForPrinting = null;
	protected void registerJREFontsWithPlatform(String pathName) {
	fontsForPrinting = pathName;
	}

	public static void registerJREFontsForPrinting() {
	final String pathName;
	synchronized (Win32GraphicsEnvironment.class) {
	GraphicsEnvironment.getLocalGraphicsEnvironment();
	if (fontsForPrinting == null) {
	return;
	}
	pathName = fontsForPrinting;
	fontsForPrinting = null;
	}
	java.security.AccessController.doPrivileged(
	new java.security.PrivilegedAction() {
	public Object run() {
	File f1 = new File(pathName);
	String[] ls = f1.list(new TTFilter());
	if (ls == null) {
	return null;
	}
	for (int i=0; i <ls.length; i++ ) {
	File fontFile = new File(f1, ls[i]);
	registerFontWithPlatform(fontFile.getAbsolutePath());
	}
	return null;
	}
	});
	}

	protected static native void registerFontWithPlatform(String fontName);

	protected static native void deRegisterFontWithPlatform(String fontName);

	protected GraphicsDevice makeScreenDevice(int screennum) {
	GraphicsDevice device = null;
	if (WindowsFlags.isD3DEnabled()) {
	device = D3DGraphicsDevice.createDevice(screennum);
	}
	if (device == null) {
	device = new Win32GraphicsDevice(screennum);
	}
	return device;
	}

	// Implements SunGraphicsEnvironment.createFontConfiguration.
	protected FontConfiguration createFontConfiguration() {
	FontConfiguration fc = new WFontConfiguration(this);
	fc.init();
	return fc;
	}

	public FontConfiguration createFontConfiguration(boolean preferLocaleFonts,
	boolean preferPropFonts) {

	return new WFontConfiguration(this, preferLocaleFonts,preferPropFonts);
	}

	@Override
	public boolean isFlipStrategyPreferred(ComponentPeer peer) {
	GraphicsConfiguration gc;
	if (peer != null && (gc = peer.getGraphicsConfiguration()) != null) {
	GraphicsDevice gd = gc.getDevice();
	if (gd instanceof D3DGraphicsDevice) {
	return ((D3DGraphicsDevice)gd).isD3DEnabledOnDevice();
	}
	}
	return false;
	}

	private static volatile boolean isDWMCompositionEnabled;
	/**
	* Returns true if dwm composition is currently enabled, false otherwise.
	*
	* @return true if dwm composition is enabled, false otherwise
	*/
	public static boolean isDWMCompositionEnabled() {
	return isDWMCompositionEnabled;
	}

	/**
	* Called from the native code when DWM composition state changed.
	* May be called multiple times during the lifetime of the application.
	* REMIND: we may want to create a listener mechanism for this.
	*
	* Note: called on the Toolkit thread, no user code or locks are allowed.
	*
	* @param enabled indicates the state of dwm composition
	*/
	private static void dwmCompositionChanged(boolean enabled) {
	isDWMCompositionEnabled = enabled;
	}

	@Override
	public boolean isDisplayLocal() {
	return true;
	}
	}