LWJGL Forum

Is there any method by which one can get a list of safe resolutions that the application/game can run on?

I was able to create the following method:

public void changeResolution(int resolutionWidth, int resolutionHeight,
    int bitDepth) throws ChangeResolutionException {
try {
    DisplayMode modes[] = Display.getAvailableDisplayModes();
    for(DisplayMode currentMode : modes)
    {
if(currentMode.getWidth() == resolutionWidth
&& currentMode.getHeight() == resolutionHeight
&& currentMode.getBitsPerPixel() == bitDepth)
{
    Display.setDisplayMode(currentMode);
    break;
}
    }
} catch(LWJGLException lWJGLException) {
    throw new ChangeResolutionException();
}
    }

As you can see, you can pass just about any int for the resolution width, height and bit-depth. The reason I am asking is because I want to create an options menu where the user can choose a preferred resolution.

Display.getAvailableDisplayModes(); gives you all the possible modes.
You could probably filter out some insane modes if you want to, but all of those modes should work with fullscreen

If you have enabled "valid resolutions" in your display driver settings "getAvailableDisplayModes()" will return all valid modes your monitor support. Even if the graphic card support much more. Thus aren't listed then.

Ah silly me. So will this work?

try {
  DisplayMode modes[] = Display.getAvailableDisplayModes();
  Display.setDisplayMode(modes[0]);
} catch(LWJGLException lWJGLException) {
  // caught exception
}

Quote from: bounceWiggleBounce on March 08, 2007, 01:36:09
Ah silly me. So will this work?

Code Select Expand

try {
  DisplayMode modes[] = Display.getAvailableDisplayModes();
  Display.setDisplayMode(modes[0]);
} catch(LWJGLException lWJGLException) {
  // caught exception
}

With that, you have no idea what modes[0] is. It might be 640x480x16, or it might be something much bigger. What you should do is decide on a sane default, perhaps 1024x768x32 or 800x600x32, and then iterate the list to find a mode that matches.

But what if the player's computer doesn't support something sane?
How about this code:

public boolean changeResolution(int resolutionWidth, int resolutionHeight,
    int bitDepth) throws ChangeResolutionException {
try {
    DisplayMode modes[] = Display.getAvailableDisplayModes();
    for(DisplayMode currentMode : modes)
    {
if(currentMode.getWidth() == resolutionWidth
&& currentMode.getHeight() == resolutionHeight
&& currentMode.getBitsPerPixel() == bitDepth)
{
    Display.setDisplayMode(currentMode);
    return true;
}
    }
} catch(LWJGLException lWJGLException) {
    throw new ChangeResolutionException();
}
return false;
}
public void getFirstAvailableResolution() throws ChangeResolutionException {
try {
    DisplayMode modes[] = Display.getAvailableDisplayModes();
    Display.setDisplayMode(modes[0]);
} catch(LWJGLException lWJGLException) {
    throw new ChangeResolutionException();
}
}


And a call to that would look like:


try {
if(!changeResolution(800, 600, 16))
getFirstAvailableResolution();
} catch(ChangeResolutionException changeResolutionException) {
//error
}


What happens if the programmers decides to use the current default mode that the computer is operating on?

here is some code that i use


        DisplayMode d[] = Display.getAvailableDisplayModes();
        DisplayMode displayMode = null;
        for (int i = 0; i < d.length; i++) {
            displayMode = d[i];
            //System.out.println(displayMode.toString());
            if (d[i].getWidth() == 640
                && d[i].getHeight() == 480
                && d[i].getBitsPerPixel() == 32) {
                break;
            }
        }
        Display.setDisplayMode(displayMode);


its safe and you can change the values (640, 480, 32)  to a recommended size, if the size isnt supported it will at least be assigned another existing resolution

Crisp and works great for me. Thank u very much.