import sun.java2d.ScreenUpdateManager; //导入依赖的package包/类
/**
 * Flushes the single D3DRenderQueue instance synchronously.  If an
 * D3DRenderQueue has not yet been instantiated, this method is a no-op.
 * This method is useful in the case of Toolkit.sync(), in which we want
 * to flush the D3D pipeline, but only if the D3D pipeline is currently
 * enabled.  Since this class has few external dependencies, callers need
 * not be concerned that calling this method will trigger initialization
 * of the D3D pipeline and related classes.
 */
public static void sync() {
    if (theInstance != null) {
        // need to make sure any/all screen surfaces are presented prior
        // to completing the sync operation
        D3DScreenUpdateManager mgr =
            (D3DScreenUpdateManager)ScreenUpdateManager.getInstance();
        mgr.runUpdateNow();

        theInstance.lock();
        try {
            theInstance.ensureCapacity(4);
            theInstance.getBuffer().putInt(SYNC);
            theInstance.flushNow();
        } finally {
            theInstance.unlock();
        }
    }
}
 

import sun.java2d.ScreenUpdateManager; //导入依赖的package包/类
@Override
void disableAccelerationForSurface() {
    // for on-screen surfaces we need to make sure a backup GDI surface is
    // is used until a new one is set (which may happen during a resize). We
    // don't want the screen update maanger to replace the surface right way
    // because it causes repainting issues in Swing, so we invalidate it,
    // this will prevent SUM from issuing a replaceSurfaceData call.
    setSurfaceLost(true);
    invalidate();
    flush();
    peer.disableAcceleration();
    ScreenUpdateManager.getInstance().dropScreenSurface(this);
}
 

import sun.java2d.ScreenUpdateManager; //导入依赖的package包/类
public void createScreenSurface(boolean isResize)
{
    Win32GraphicsConfig gc = (Win32GraphicsConfig)getGraphicsConfiguration();
    ScreenUpdateManager mgr = ScreenUpdateManager.getInstance();

    surfaceData = mgr.createScreenSurface(gc, this, numBackBuffers, isResize);
}
 

import sun.java2d.ScreenUpdateManager; //导入依赖的package包/类
@Override
protected void disposeImpl() {
    SurfaceData oldData = surfaceData;
    surfaceData = null;
    ScreenUpdateManager.getInstance().dropScreenSurface(oldData);
    oldData.invalidate();
    // remove from updater before calling targetDisposedPeer
    WToolkit.targetDisposedPeer(target, this);
    _dispose();
}
 

import sun.java2d.ScreenUpdateManager; //导入依赖的package包/类
protected void disposeImpl() {
    SurfaceData oldData = surfaceData;
    surfaceData = null;
    ScreenUpdateManager.getInstance().dropScreenSurface(oldData);
    oldData.invalidate();
    // remove from updater before calling targetDisposedPeer
    WToolkit.targetDisposedPeer(target, this);
    _dispose();
}