如何在SWT中将背景图像设置为shell或复合

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());

Image backgroundImage = new Image(display, "path/to/background/image.jpg");

shell.setBackgroundImage(backgroundImage);

Rectangle bounds = backgroundImage.getBounds();
shell.setSize(bounds.width, bounds.height);

shell.open();
while (!shell.isDisposed()) {
    if (!display.readAndDispatch()) {
        display.sleep();
    }
}
display.dispose();