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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* 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.
*
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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();
}
}
}
// 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;
}
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