here is another hack that enables your sketch to not only run as fullscreen but also switch the resolution.

Code:

import java.awt.Component;
import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;

import processing.core.PApplet;


public class TestFullscreen
extends PApplet {

  public void setup() {
    size(640, 480, OPENGL);
    rectMode(CENTER);
    switchResolution();
  }


  public void draw() {
    background(127, 255, 0);

    fill(255, 255);
    stroke(0, 255);
    strokeWeight(20);
    rect(mouseX, mouseY, 200, 200);
  }


  private void switchResolution() {
    try {
	GraphicsDevice myGraphicsDevice = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
	if (myGraphicsDevice.isDisplayChangeSupported()) {
	  DisplayMode myDisplayMode = new DisplayMode(
	  width,
	  height,
	  32,
	  DisplayMode.REFRESH_RATE_UNKNOWN);
	  myGraphicsDevice.setDisplayMode(myDisplayMode);
	}

	Component[] myComponents = frame.getComponents();
	for (int i = 0; i < myComponents.length; i++) {
	  if (myComponents[i] instanceof PApplet) {
	    myComponents[i].setLocation(0, 0);
	  }
	}
    } 
    catch (Exception e) {
    }
  }


  public static void main(String[] args) {
    PApplet.main(new String[] {"--present", "TestFullscreen"});
  }
}
 

the sketch needs to run in presentation mode ( shift + play ) and you need to define meaningful screen dimensions that are supported by your output device.

enjoy.

If I've understood it correctly, full-screen mode is a special mode where an application has full control of the screen and hence potentially better performance. It's more than just a big window with the frame turned off, which is why you get a problem when trying to interact with another window. When you do that, your sketch loses "control" and reverts back to being a regular window.

Generally, a window that is the same size as the screen resolution and has no frames will work well for "full screen". I use that even for dual-screen projections, with a single window with sizes up 2560x1024. Just set up a double-size window, turn off the frame and place it at the top left corner. You might have problems with the positioning though, but it can be done through the switches built into main().

Sorry, not sure I can help since it seems to be buried deep in the main() / setup() / size() logic that controls how Processing sets up and runs a sketch. So from inside Processing you might not be able to. But.... there's always Java.

If you look at the source code for PApplet.java you can get a drift of the execution order. Most of the fullscreen etc. stuff happens in main(), but that is only called when running as an application. Inside the Processing environment your sketch is still executed as an applet, so init() is called instead of main().

So... digging around a little I tried a little hack by overriding init(), and guess what It works for turning off window decorations, but not setting the location of the window. So it's not a complete solution, but maybe someone else has the final key to the puzzle.

Code:

import processing.opengl.*;
 
void setup(){
  size(400,400,OPENGL);
  background(0);
}
 
void draw(){
  stroke(255);
  line(0,0,200,200);
} 

public void init() {
  frame.setUndecorated(true); // works.
  frame.setLocation(0,0); // doesn't. why not?

  // call PApplet.init() to take care of business
  super.init(); 
} 

FYI everyone who is using multiple displays on a mac and wants specific control over which display your sketch uses and full screen without taking over the other screen--

setLocation(0,0) means the upper left corner of the MAIN display - which is the display with the menubar (you can drag the mini menubar between displays in the displays sys pref to switch).

You can use negative values in setLocation if your sketch display is configured for the left of the main display. For example if your main display is 1440x900 and your 2nd display is to the left and 800x600, you can use:

frame.setLocation(-800,0);

It works the other way too, if your 2nd display is instead to the right of the main display, you can then use:

frame.setLocation(1440, 0);

and it'll pop it over to the 2nd display full screen without disrupting the other display.

tomgupper wrote on Oct 30^th, 2007, 12:21pm:


I seem to be having the same issue not just openGL, P3D and P2D also. It looks like it launches but dosen't display anything. The sketch shows up in the task bar and everything. I tried it on multiple vista machines no luck.