Cannot create external context (swt + jogl 2)

[gaufrier]

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

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)

...
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:

...
canvas.setCurrent();
GLContext  context = GLDrawableFactory.getFactory().createExternalGLContext();

An idea ?

Thanks

[gouessej]

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

[gaufrier]

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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[gaufrier]

Juste found a solution (uncommon).

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:

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;

[gouessej]

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.