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  LWJGL as an JNLP Extension  (Read 1518 times)
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Offline Alan_W

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Medals: 8
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« Posted 2005-05-29 06:15:54 »

It is currently necessary to sign the application as well as the libraries when using LWJGL as a JNLP extension.  This will be inconvenient for the LWJGL16k competition as signing the jar expands its size by about 1.5k

As a temporary workaround, I have created the following utility class, which should be put in a signed jar and used as a JNLP extension.  It duplicates the problematic methods in org.lwjgl.opengl.Display & org.lwjgl.util.Display with a security wrapper.

This will make it easier to demonstrate that the unsigned jar is no more then 16k when distributed with webstart.

Alan

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/*
 * Display.java
 *
 * Created on 29 May 2005, 06:40
 */

package util;

import java.security.AccessController;
import java.security.PrivilegedExceptionAction;
import java.security.PrivilegedActionException;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.PixelFormat;
import org.lwjgl.opengl.Drawable;

/** This wraps key methods of the two LWJGL Display classes to allow
    LWJGL to work as a JNLP Extension. */

public final class Display {
   
    /** Creates a new instance of Display */
    public Display() {
    }

    // Wrapping key methods from org.lwjgl.opengl.Display

    /** Create the OpenGL context.*/
    public static void create() throws org.lwjgl.LWJGLException {
        try {
            AccessController.doPrivileged(
                new PrivilegedExceptionAction() {
                    public Object run() throws org.lwjgl.LWJGLException {
                        org.lwjgl.opengl.Display.create();
                        return null;
                    }
                });        
        } catch (PrivilegedActionException e) {
            throw (org.lwjgl.LWJGLException) e.getException();
        }
    }

    /** Create the OpenGL context with the given minimum parameters. */
    public static void create(PixelFormat pixel_format)
        throws org.lwjgl.LWJGLException {
        final PixelFormat fpixel_format = pixel_format;
        try {
            AccessController.doPrivileged(
                new PrivilegedExceptionAction() {
                    public Object run() throws org.lwjgl.LWJGLException {
                        org.lwjgl.opengl.Display.create(fpixel_format);
                        return null;
                    }
                });        
        } catch (PrivilegedActionException e) {
            throw (org.lwjgl.LWJGLException) e.getException();
        }
    }
   
    /** Create the OpenGL context with the given minimum parameters. */
    public static void create(PixelFormat pixel_format,
        Drawable shared_drawable) throws org.lwjgl.LWJGLException {
        final PixelFormat fpixel_format = pixel_format;
        final Drawable fshared_drawable = shared_drawable;
        try {
            AccessController.doPrivileged(
                new PrivilegedExceptionAction() {
                    public Object run() throws org.lwjgl.LWJGLException {
                        org.lwjgl.opengl.Display.create(
                            fpixel_format,fshared_drawable);
                        return null;
                    }
                });        
        } catch (PrivilegedActionException e) {
            throw (org.lwjgl.LWJGLException) e.getException();
        }
    }

    /** Returns the entire list of possible fullscreen display modes
        as an array, in no particular order.*/

    public static DisplayMode[] getAvailableDisplayModes()
        throws org.lwjgl.LWJGLException {
        try {
            final Object fmodes = AccessController.doPrivileged(
                new PrivilegedExceptionAction() {
                    public Object run() throws org.lwjgl.LWJGLException {
                        return org.lwjgl.opengl.Display.getAvailableDisplayModes();
                    }
                });
            return (DisplayMode[])fmodes;    
        } catch (PrivilegedActionException e) {
            throw (org.lwjgl.LWJGLException) e.getException();
        }
    }

    /** Make the Display the current rendering context for GL calls. */
    public static void makeCurrent() throws org.lwjgl.LWJGLException {
        try {
            AccessController.doPrivileged(
                new PrivilegedExceptionAction() {
                    public Object run() throws org.lwjgl.LWJGLException {
                        org.lwjgl.opengl.Display.makeCurrent();
                        return null;
                    }
                });        
        } catch (PrivilegedActionException e) {
            throw (org.lwjgl.LWJGLException) e.getException();
        }
    }

    /** Set the display configuration to the specified gamma,
        brightness and contrast. */

    public static void setDisplayConfiguration(
        float gamma, float brightness, float contrast)
        throws org.lwjgl.LWJGLException {
        final float fgamma = gamma;
        final float fbrightness = brightness;
        final float fcontrast = contrast;
        try {
            AccessController.doPrivileged(
                new PrivilegedExceptionAction() {
                    public Object run() throws org.lwjgl.LWJGLException {
                        org.lwjgl.opengl.Display.setDisplayConfiguration(
                            fgamma, fbrightness, fcontrast);
                        return null;
                    }
                });        
        } catch (PrivilegedActionException e) {
            throw (org.lwjgl.LWJGLException) e.getException();
        }
    }

    /** Set the current display mode */
    public static void setDisplayMode(DisplayMode mode)
        throws org.lwjgl.LWJGLException {
        final DisplayMode fmode = mode;
        try {
            AccessController.doPrivileged(
                new PrivilegedExceptionAction() {
                    public Object run() throws org.lwjgl.LWJGLException {
                       org.lwjgl.opengl.Display.setDisplayMode(fmode);
                       return null;
                    }
                });            
        } catch (PrivilegedActionException e) {
            throw (org.lwjgl.LWJGLException) e.getException();
        }
    }

    /** Set the fullscreen mode of the context. */
    public static void setFullscreen(boolean fullscreen)
        throws org.lwjgl.LWJGLException {
        final boolean ffullscreen = fullscreen;
        try {
            AccessController.doPrivileged(
                new PrivilegedExceptionAction() {
                    public Object run() throws org.lwjgl.LWJGLException {
                        org.lwjgl.opengl.Display.setFullscreen(ffullscreen);
                        return null;
                    }
                });                
        } catch (PrivilegedActionException e) {
            throw (org.lwjgl.LWJGLException) e.getException();
        }
    }
   
    // Wrapping key methods from org.lwjgl.util.Display
   
    /** Determine the available display modes that match
        the specified minimum and maximum criteria. */

    public static DisplayMode[] getAvailableDisplayModes(
        int minWidth, int minHeight, int maxWidth, int maxHeight,
        int minBPP, int maxBPP, int minFreq, int maxFreq)
        throws org.lwjgl.LWJGLException {
        final int fminWidth = minWidth;
        final int fminHeight = minHeight;
        final int fmaxWidth = maxWidth;
        final int fmaxHeight = maxHeight;
        final int fminBPP = minBPP;
        final int fmaxBPP = maxBPP;
        final int fminFreq = minFreq;
        final int fmaxFreq = maxFreq;
        try {
            final Object fmodes = AccessController.doPrivileged(
                new PrivilegedExceptionAction() {
                    public Object run() throws org.lwjgl.LWJGLException {
                       return org.lwjgl.util.Display.getAvailableDisplayModes(
                           fminWidth, fminHeight, fmaxWidth, fmaxHeight,
                            fminBPP, fmaxBPP, fminFreq, fmaxFreq);
                    }
                });
            return (DisplayMode[])fmodes;    
        } catch (PrivilegedActionException e) {
            throw (org.lwjgl.LWJGLException) e.getException();
        }
    }
   
    /** Create the display by choosing from a list of display modes
        based on an order of preference. */

    public static DisplayMode setDisplayMode(
        DisplayMode[] dm, String[] param)
        throws Exception { // Why does this not throw LWJGLException?
        final DisplayMode[] fdm = dm;
        final String[] fparam = param;
        try {
            final Object fmode = AccessController.doPrivileged(
                new PrivilegedExceptionAction() {
                    public Object run() throws Exception {
                       return org.lwjgl.util.Display.setDisplayMode(
                           fdm, fparam );
                    }
                });
            return (DisplayMode)fmode;            
        } catch (PrivilegedActionException e) {
            throw (Exception) e.getException();
        }
    }
}

Time flies like a bird. Fruit flies like a banana.
Offline elias

Senior Devvie





« Reply #1 - Posted 2005-05-30 15:16:07 »

I took a stab at fixing this and comitted to CVS. Please notify me if I missed anything.

- elias

Offline Alan_W

JGO Knight


Medals: 8
Projects: 3


Java tames rock!


« Reply #2 - Posted 2005-05-30 15:54:10 »

Quote
I took a stab at fixing this and comitted to CVS. Please notify me if I missed anything.

- elias


Thanks, I'll go take a look.

Alan

Time flies like a bird. Fruit flies like a banana.
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Offline tusaki

Junior Devvie


Medals: 1


In a mad world only the mad are sane.


« Reply #3 - Posted 2005-05-30 23:10:31 »

you could also just put a java webstart library at the lwjgl website, which should contain the latest version.

this way, others can reference this library by putting

1  
<extension href="http://www.lwjgl.org/webstart/lwjgl.jnlp" name="LWJGL"/>
(example, this doesn't exist)

in their own JNLP files.
Offline Matzon

JGO Knight


Medals: 19
Projects: 1


I'm gonna wring your pants!


« Reply #4 - Posted 2005-05-31 03:35:09 »

there will never be a latests, since the *will* cause problems. If anything we might do some versioned ones - say 0.98 or 1.0. However we would have to check bandwidth issues before hand, since it might skyrocket.

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