Code Review on a Full Screen Graphics Wrapper

Question

Hi all, if you could be so kind, could I get a quick review of my full screen graphics wrapper? It is giving strange flickering issues on an OSX TIBook, although that may be Apple's implementation. Also, am I breaking any major rules? Thanks, Ryan
package rpgClient.graphics;
import java.awt.*;
import java.awt.image.*;
public class Screen
     private Frame mainFrame;
     private GraphicsDevice gd;
     private BufferStrategy bs;
     private DisplayMode oldDisplayMode;
     private DisplayMode newDisplayMode;
     public Screen(GraphicsDevice gd, DisplayMode dm)
          System.setProperty( "sun.java2d.translaccel" ,"true" );
          this.gd = gd;
          oldDisplayMode = gd.getDisplayMode();
          newDisplayMode = dm;
          GraphicsConfiguration gc = gd.getDefaultConfiguration();
          mainFrame = new Frame(gc);
          mainFrame.setUndecorated(true);
          mainFrame.setIgnoreRepaint(true);
     //screen specifications
     public static GraphicsDevice[] getGrephicsDevices()
          return GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices();
     public static GraphicsDevice getDefaultGraphicsDevice()
          return GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
     public static DisplayMode createDisplayMode(int width, int height, int bitdepth)
          return new DisplayMode(width, height, bitdepth, DisplayMode.REFRESH_RATE_UNKNOWN);
     public static DisplayMode[] getDefaultDisplayModes()
          return GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDisplayModes();
     public static DisplayMode[] getDisplayModes(GraphicsDevice gd)
          return gd.getDisplayModes();
     public static boolean isValidDisplayMode(GraphicsDevice gd, DisplayMode dm)
          DisplayMode[] dms = getDisplayModes(gd);
          for(int i = 0; i < dms.length; i++)
               if(dms.getWidth() == dm.getWidth() &&
               dms[i].getHeight() == dm.getHeight() &&
               dms[i].getBitDepth() == dm.getBitDepth())
                    return true;
          return false;
     public static boolean isValidDefaultDisplayMode(DisplayMode dm)
          return isValidDisplayMode(getDefaultGraphicsDevice(), dm);
     //class methods
     public boolean isFullScreenSupported()
          return gd.isFullScreenSupported();
     public boolean isDisplayChangeSupported()
          return gd.isDisplayChangeSupported();
     public void initFullscreen() throws Screen.FullScreenInitException
          if(!isFullScreenSupported() || !isDisplayChangeSupported())
               throw new Screen.FullScreenInitException();
          //init the display
          gd.setDisplayMode(newDisplayMode);
          gd.setFullScreenWindow(mainFrame);
          mainFrame.createBufferStrategy(3);
          bs = mainFrame.getBufferStrategy();
     public void deinitFullscreen()
          gd.setFullScreenWindow(null);
          gd.setDisplayMode(oldDisplayMode);
     public Frame getBaseFrame()
          return mainFrame;
     public GraphicsConfiguration getCurrentGraphicsConfiguration()
          return mainFrame.getGraphicsConfiguration();
     public void dispose()
          mainFrame.dispose();
          mainFrame.removeNotify();
     //Draw method one: Pass in an image of the screen
     public void bltImage(Image i)
          Graphics g = bs.getDrawGraphics();
          g.setColor(Color.BLACK);
          g.fillRect(0,0, newDisplayMode.getWidth(), newDisplayMode.getHeight());
          g.drawImage(i, 0, 0, null);
          g.dispose();
          bs.show();
     //Draw method two: Get the back buffer, do you buisness, then initiate the blt
     public Graphics2D getGrahphics2D()
          Graphics2D g = (Graphics2D)bs.getDrawGraphics();
          g.setColor(Color.BLACK);
          g.fillRect(0,0, newDisplayMode.getWidth(), newDisplayMode.getHeight());
          return g;
     public void bltGraphics2D(Graphics2D g)
          bs.show();
          g.dispose();
     public class FullScreenInitException extends Exception {}

Answer 1

Hi there,
Did you ever resolve this problem? I am new to the Fullscreen API but I am writing a complicated interactive screensaver. It works really well on Windows XP but there is terrible startup flicker on OS X. My own graphics is repeatedly overdrawn with a blank white screen, about four or five times over a few seconds, then finally the window starts behaving (nearly) as expected. The same drawing code works well in a windowed version on OS X.
Anyone else have this problem?