import java.awt.GraphicsEnvironment;
import java.awt.GraphicsDevice;
import java.awt.GraphicsConfiguration;
import java.awt.DisplayMode;
import java.awt.BufferCapabilities;

/**
 * Lists information about the screen and buffering capabilities.
 *
 *@author Leif Lindback
 */
public class ListScreenInfo {
    private GraphicsEnvironment environment;
    private GraphicsDevice device;

    /**
     * Creates an instance of <code>ListScreenInfo</code> with 
     * the current <code>GraphicsEnvironment</code> and <code>GraphicsDevice</code>.
     */
    public ListScreenInfo() {
	environment = GraphicsEnvironment.getLocalGraphicsEnvironment();
	device = environment.getDefaultScreenDevice();
    }

    /**
     * Lists information contained in <code>GraphicsDevice</code>
     */
    public void printDeviceInfo() {
	System.out.println("\nDefault screen:" + device);
	System.out.println("Supports full-screen exclusive mode:" + device.isFullScreenSupported());
	System.out.println("Supports low-level display changes:" + device.isDisplayChangeSupported());
	System.out.println("Amount of accelerated memory:" + device.getAvailableAcceleratedMemory() + "MB");
    }

    /**
     * Lists information contained in <code>DisplayMode</code>
     */
    public void printScreenInfo() {
	DisplayMode currentDm = device.getDisplayMode();
	DisplayMode[] allDms = device.getDisplayModes();
	System.out.println("\nCurrent display mode:" + currentDm);
	System.out.println("Bit depth:" + currentDm.getBitDepth());
	System.out.println("bitdepth multi:" + (currentDm.getBitDepth() == DisplayMode.BIT_DEPTH_MULTI));
	System.out.println("Refresh rate:" + currentDm.getRefreshRate());
	System.out.println("refresh rate unknown:" + (currentDm.getRefreshRate() == DisplayMode.REFRESH_RATE_UNKNOWN));
	System.out.println("Height:" + currentDm.getHeight());
	System.out.println("Width:" + currentDm.getWidth());
	System.out.println("\nAll modes:");
	for (int i=0; i<allDms.length; i++) {
	    System.out.println(allDms[i]);
	}
    }

    /**
     * Lists information contained in <code>GraphicsConfiguration</code>
     */
    public void printConfigurationInfo() {
	GraphicsConfiguration dgc = device.getDefaultConfiguration();
	System.out.println("\nDefault configuration:" + dgc);
	System.out.println("All configurations:");
	GraphicsConfiguration[] confs = device.getConfigurations();
	for (int i=0; i<confs.length; i++) {
	    System.out.println("\n" +confs[i]);
	    BufferCapabilities bc = confs[i].getBufferCapabilities();
	    System.out.println("Is page flipping:" + bc.isPageFlipping());
	    System.out.println("Is full-screen required:" + bc.isFullScreenRequired());
	    System.out.println("Is multi buffer available:" + bc.isMultiBufferAvailable());
	    System.out.println("Back buffer is accelerated:" + bc.getBackBufferCapabilities().isAccelerated());
	    System.out.println("Back buffer is true volatile:" + bc.getBackBufferCapabilities().isTrueVolatile());
	    System.out.println("Front buffer is accelerated:" + bc.getFrontBufferCapabilities().isAccelerated());
	    System.out.println("Front buffer is true volatile:" + bc.getFrontBufferCapabilities().isTrueVolatile());
	    System.out.println("Flip contents is copied:" + 
			       (bc.getFlipContents() == BufferCapabilities.FlipContents.COPIED));
	    System.out.println("Flip contents is background:" + 
			       (bc.getFlipContents() == BufferCapabilities.FlipContents.BACKGROUND));
	    System.out.println("Flip contents is prior:" + 
			       (bc.getFlipContents() == BufferCapabilities.FlipContents.PRIOR));
	    System.out.println("Flip contents is undefined:" + 
			       (bc.getFlipContents() == BufferCapabilities.FlipContents.UNDEFINED));
	}
    }

    public static void main(String[] args) {
	ListScreenInfo lsi = new ListScreenInfo();
	lsi.printDeviceInfo();
	lsi.printScreenInfo();
	lsi.printConfigurationInfo();
    }
}