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  Cannot create external context (swt + jogl 2)  (Read 2516 times)
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Offline gaufrier

Junior Newbie





« Posted 2009-10-17 19:26:55 »

Hi all,

I have a problem with createExternalGLContext on Jogl 2.0  for a swt application (packages org.eclipse.swt v3.5)

When I create an external context I have an error: attempted to make an external GLContext without a valid pixelformat
Quote
Exception in thread "main" javax.media.opengl.GLException: Error: attempted to make an external GLContext without a valid pixelformat
   at com.sun.opengl.impl.windows.wgl.WindowsExternalWGLContext.create(WindowsExternalWGLContext.java:76)
   at com.sun.opengl.impl.windows.wgl.WindowsWGLDrawableFactory.createExternalGLContext(WindowsWGLDrawableFactory.java:162)

I test also the snippet209 from jogl demo and I have the same error.
I use this (same as snippet209)
Quote
...
canvas.setCurrent();
final GLProfile gl2Profile = GLProfile.get(GLProfile.GL2);
GLDrawableFactory factory = GLDrawableFactory.getFactory(gl2Profile );
GLContext context = factory.createExternalGLContext();

In jogl 1.1 (without profil) it works:
Quote
...
canvas.setCurrent();
GLContext  context = GLDrawableFactory.getFactory().createExternalGLContext();

An idea ?

Thanks
Offline gouessej
« Reply #1 - Posted 2009-10-18 08:54:36 »

Please submit a bug report, I may encounter the same bug when I work with Eclipse RCP 3.5 and JOGL 2 in November.

Offline gaufrier

Junior Newbie





« Reply #2 - Posted 2009-10-18 12:31:01 »

I  have also the same problem with swt 3.2.

Both 3.2 et 3.5 tests were on winxp.
I test the same programm and snippet on a linux version with swt 3.5 and it works.

Can I change the pixelformat before creating my external context ?
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Offline gaufrier

Junior Newbie





« Reply #3 - Posted 2010-09-30 15:20:09 »

Juste found a solution (uncommon).


Quote
canvas.setCurrent();
WGL.GetDC(canvas.handle);
final GLProfile gl2Profile = GLProfile.get(GLProfile.GL2);
GLDrawableFactory factory = GLDrawableFactory.getFactory(gl2Profile );
GLContext context = factory.createExternalGLContext();

Just add  WGL.GetDC(canvas.handle); (and import com.sun.opengl.impl.windows.wgl.WGL;)


In new version of Jogl (from jogamp) the code is not exactly the same:
Quote
canvas.setCurrent();
GDI.GetDC(canvas.handle);
final GLProfile gl2Profile = GLProfile.get(GLProfile.GL2);
GLDrawableFactory factory = GLDrawableFactory.getFactory(gl2Profile );
GLContext context = factory.createExternalGLContext();

And import com.jogamp.opengl.impl.windows.wgl.GDI;


Offline gouessej
« Reply #4 - Posted 2010-10-01 11:05:55 »

Juste found a solution (uncommon).


Just add  WGL.GetDC(canvas.handle); (and import com.sun.opengl.impl.windows.wgl.WGL;)


In new version of Jogl (from jogamp) the code is not exactly the same:
And import com.jogamp.opengl.impl.windows.wgl.GDI;
Strange solution. Thank you for reporting this. You should write a bug report about this problem.

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