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

 /*
  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. 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.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 package sun.awt;

 import java.awt.AWTError;
 import java.awt.GraphicsConfiguration;
 import java.awt.GraphicsDevice;
 import java.awt.peer.ComponentPeer;
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.ListIterator;

 import sun.awt.windows.WToolkit;
 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 final class Win32GraphicsEnvironment extends SunGraphicsEnvironment {

     static final float debugScaleX;
     static final float debugScaleY;

     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();

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

         double sx = -1;
         double sy = -1;
         if (isUIScaleEnabled()) {
             sx = getScaleFactor("sun.java2d.win.uiScaleX");
             sy = getScaleFactor("sun.java2d.win.uiScaleY");
             if (sx <= 0 || sy <= 0) {
                 double s = getDebugScale();
                 sx = s;
                 sy = s;
             }
         }

         debugScaleX = (float) sx;
         debugScaleY = (float) sy;
     }

     /**
      * 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();
     private native int getDefaultScreen();

     public GraphicsDevice getDefaultScreenDevice() {
         GraphicsDevice[] screens = getScreenDevices();
         if (screens.length == 0) {
             throw new AWTError("no screen devices");
         }
         int index = getDefaultScreen();
         return screens[0 < index && index < screens.length ? index : 0];
     }

     /**
      * 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.
      * @return 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.
      * @return 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----
  */

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

     public boolean isDisplayLocal() {
         return true;
     }

     @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;
     }

     /**
      * Used to find out if the OS is Windows Vista or later.
      *
      * @return {@code true} if the OS is Vista or later, {@code false} otherwise
      */
     public static native boolean isVistaOS();
 }
	/*
	* Copyright (c) 1997, 2015, Oracle and/or its affiliates. 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. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.awt;

	import java.awt.AWTError;
	import java.awt.GraphicsConfiguration;
	import java.awt.GraphicsDevice;
	import java.awt.peer.ComponentPeer;
	import java.lang.ref.WeakReference;
	import java.util.ArrayList;
	import java.util.ListIterator;

	import sun.awt.windows.WToolkit;
	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 final class Win32GraphicsEnvironment extends SunGraphicsEnvironment {

	static final float debugScaleX;
	static final float debugScaleY;

	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();

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

	double sx = -1;
	double sy = -1;
	if (isUIScaleEnabled()) {
	sx = getScaleFactor("sun.java2d.win.uiScaleX");
	sy = getScaleFactor("sun.java2d.win.uiScaleY");
	if (sx <= 0 \|\| sy <= 0) {
	double s = getDebugScale();
	sx = s;
	sy = s;
	}
	}

	debugScaleX = (float) sx;
	debugScaleY = (float) sy;
	}

	/**
	* 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();
	private native int getDefaultScreen();

	public GraphicsDevice getDefaultScreenDevice() {
	GraphicsDevice[] screens = getScreenDevices();
	if (screens.length == 0) {
	throw new AWTError("no screen devices");
	}
	int index = getDefaultScreen();
	return screens[0 < index && index < screens.length ? index : 0];
	}

	/**
	* 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.
	* @return 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.
	* @return 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----
	*/

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

	public boolean isDisplayLocal() {
	return true;
	}

	@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;
	}

	/**
	* Used to find out if the OS is Windows Vista or later.
	*
	* @return {@code true} if the OS is Vista or later, {@code false} otherwise
	*/
	public static native boolean isVistaOS();
	}