268 lines
9.6 KiB
Java
268 lines
9.6 KiB
Java
/*
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.awt;
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import java.awt.AWTError;
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import java.awt.GraphicsConfiguration;
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import java.awt.GraphicsDevice;
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import java.awt.GraphicsEnvironment;
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import java.awt.Toolkit;
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import java.awt.peer.ComponentPeer;
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import java.io.File;
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import java.io.IOException;
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import java.lang.ref.WeakReference;
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import java.util.ArrayList;
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import java.util.ListIterator;
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import java.util.NoSuchElementException;
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import java.util.StringTokenizer;
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import sun.awt.DisplayChangedListener;
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import sun.awt.SunDisplayChanger;
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import sun.awt.windows.WPrinterJob;
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import sun.awt.windows.WToolkit;
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import sun.java2d.SunGraphicsEnvironment;
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import sun.java2d.SurfaceManagerFactory;
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import sun.java2d.WindowsSurfaceManagerFactory;
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import sun.java2d.d3d.D3DGraphicsDevice;
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import sun.java2d.windows.WindowsFlags;
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/**
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* This is an implementation of a GraphicsEnvironment object for the
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* default local GraphicsEnvironment used by the Java Runtime Environment
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* for Windows.
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*
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* @see GraphicsDevice
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* @see GraphicsConfiguration
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*/
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public class Win32GraphicsEnvironment
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extends SunGraphicsEnvironment
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{
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static {
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// Ensure awt is loaded already. Also, this forces static init
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// of WToolkit and Toolkit, which we depend upon
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WToolkit.loadLibraries();
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// setup flags before initializing native layer
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WindowsFlags.initFlags();
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initDisplayWrapper();
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// Install correct surface manager factory.
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SurfaceManagerFactory.setInstance(new WindowsSurfaceManagerFactory());
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}
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/**
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* Initializes native components of the graphics environment. This
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* includes everything from the native GraphicsDevice elements to
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* the DirectX rendering layer.
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*/
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private static native void initDisplay();
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private static boolean displayInitialized; // = false;
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public static void initDisplayWrapper() {
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if (!displayInitialized) {
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displayInitialized = true;
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initDisplay();
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}
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}
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public Win32GraphicsEnvironment() {
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}
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protected native int getNumScreens();
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protected native int getDefaultScreen();
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public GraphicsDevice getDefaultScreenDevice() {
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GraphicsDevice[] screens = getScreenDevices();
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if (screens.length == 0) {
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throw new AWTError("no screen devices");
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}
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int index = getDefaultScreen();
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return screens[0 < index && index < screens.length ? index : 0];
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}
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/**
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* Returns the number of pixels per logical inch along the screen width.
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* In a system with multiple display monitors, this value is the same for
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* all monitors.
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* @returns number of pixels per logical inch in X direction
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*/
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public native int getXResolution();
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/**
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* Returns the number of pixels per logical inch along the screen height.
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* In a system with multiple display monitors, this value is the same for
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* all monitors.
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* @returns number of pixels per logical inch in Y direction
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*/
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public native int getYResolution();
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/*
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* ----DISPLAY CHANGE SUPPORT----
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*/
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// list of invalidated graphics devices (those which were removed)
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private ArrayList<WeakReference<Win32GraphicsDevice>> oldDevices;
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/*
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* From DisplayChangeListener interface.
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* Called from WToolkit and executed on the event thread when the
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* display settings are changed.
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*/
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@Override
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public void displayChanged() {
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// getNumScreens() will return the correct current number of screens
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GraphicsDevice newDevices[] = new GraphicsDevice[getNumScreens()];
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GraphicsDevice oldScreens[] = screens;
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// go through the list of current devices and determine if they
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// could be reused, or will have to be replaced
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if (oldScreens != null) {
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for (int i = 0; i < oldScreens.length; i++) {
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if (!(screens[i] instanceof Win32GraphicsDevice)) {
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// REMIND: can we ever have anything other than Win32GD?
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assert (false) : oldScreens[i];
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continue;
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}
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Win32GraphicsDevice gd = (Win32GraphicsDevice)oldScreens[i];
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// devices may be invalidated from the native code when the
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// display change happens (device add/removal also causes a
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// display change)
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if (!gd.isValid()) {
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if (oldDevices == null) {
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oldDevices =
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new ArrayList<WeakReference<Win32GraphicsDevice>>();
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}
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oldDevices.add(new WeakReference<Win32GraphicsDevice>(gd));
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} else if (i < newDevices.length) {
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// reuse the device
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newDevices[i] = gd;
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}
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}
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oldScreens = null;
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}
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// create the new devices (those that weren't reused)
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for (int i = 0; i < newDevices.length; i++) {
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if (newDevices[i] == null) {
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newDevices[i] = makeScreenDevice(i);
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}
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}
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// install the new array of devices
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// Note: no synchronization here, it doesn't matter if a thread gets
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// a new or an old array this time around
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screens = newDevices;
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for (GraphicsDevice gd : screens) {
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if (gd instanceof DisplayChangedListener) {
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((DisplayChangedListener)gd).displayChanged();
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}
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}
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// re-invalidate all old devices. It's needed because those in the list
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// may become "invalid" again - if the current default device is removed,
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// for example. Also, they need to be notified about display
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// changes as well.
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if (oldDevices != null) {
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int defScreen = getDefaultScreen();
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for (ListIterator<WeakReference<Win32GraphicsDevice>> it =
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oldDevices.listIterator(); it.hasNext();)
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{
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Win32GraphicsDevice gd = it.next().get();
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if (gd != null) {
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gd.invalidate(defScreen);
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gd.displayChanged();
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} else {
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// no more references to this device, remove it
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it.remove();
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}
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}
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}
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// Reset the static GC for the (possibly new) default screen
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WToolkit.resetGC();
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// notify SunDisplayChanger list (e.g. VolatileSurfaceManagers and
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// CachingSurfaceManagers) about the display change event
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displayChanger.notifyListeners();
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// note: do not call super.displayChanged, we've already done everything
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}
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/*
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* ----END DISPLAY CHANGE SUPPORT----
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*/
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protected GraphicsDevice makeScreenDevice(int screennum) {
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GraphicsDevice device = null;
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if (WindowsFlags.isD3DEnabled()) {
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device = D3DGraphicsDevice.createDevice(screennum);
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}
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if (device == null) {
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device = new Win32GraphicsDevice(screennum);
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}
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return device;
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}
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public boolean isDisplayLocal() {
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return true;
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}
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@Override
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public boolean isFlipStrategyPreferred(ComponentPeer peer) {
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GraphicsConfiguration gc;
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if (peer != null && (gc = peer.getGraphicsConfiguration()) != null) {
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GraphicsDevice gd = gc.getDevice();
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if (gd instanceof D3DGraphicsDevice) {
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return ((D3DGraphicsDevice)gd).isD3DEnabledOnDevice();
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}
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}
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return false;
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}
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private static volatile boolean isDWMCompositionEnabled;
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/**
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* Returns true if dwm composition is currently enabled, false otherwise.
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*
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* @return true if dwm composition is enabled, false otherwise
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*/
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public static boolean isDWMCompositionEnabled() {
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return isDWMCompositionEnabled;
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}
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/**
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* Called from the native code when DWM composition state changed.
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* May be called multiple times during the lifetime of the application.
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* REMIND: we may want to create a listener mechanism for this.
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*
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* Note: called on the Toolkit thread, no user code or locks are allowed.
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*
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* @param enabled indicates the state of dwm composition
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*/
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private static void dwmCompositionChanged(boolean enabled) {
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isDWMCompositionEnabled = enabled;
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}
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/**
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* Used to find out if the OS is Windows Vista or later.
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*
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* @return {@code true} if the OS is Vista or later, {@code false} otherwise
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*/
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public static native boolean isVistaOS();
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}
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