pyopengl-users

[PyOpenGL-Users] freeglut: Unable to create direct context rendering

[Fabrizio P. <pol...@ir...>]

Hi all,

when I run this python script on a Debian/Linux Etch

----
#!/usr/bin/python

from OpenGL.GLUT import *
import sys

glutInit(sys.argv)
glutCreateWindow("dri")
glutMainLoop()
----

I get the warning

"
freeglut (./dri.py): Unable to create direct context rendering for 
window 'dri'
This may hurt performance.
"

and all my python code using OpenGL is slow.

On the contrary the equivalent C code

----
#include <GL/glut.h>

int main (int argc, char **argv) {
glutInit (&argc, argv);
glutCreateWindow ("test");
glutMainLoop ();
return 0;
}
----

runs fine.

The command "glxinfo | grep render"
returns

"
direct rendering: Yes
OpenGL renderer string: Mesa DRI G400 20050609 AGP 1x
"

and standard demos (glxgears) runs fine using DRI.

Any help will be appreciated.


Regards,
F. Pollastri.

Re: [PyOpenGL-Users] freeglut: Unable to create direct context rendering

[JoN <jo...@we...>]

This code works for me, stolen from the NeHe tutes:


    glutInit(sys.argv)

    # Select type of Display mode:
    # Double buffer
    # RGBA color
    # Depth buffer
    # Alpha blending
    glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH | GLUT_ALPHA=
)

    # get a 640 x 480 window
    glutInitWindowSize(640, 480)

    # the window starts at the upper left corner of the screen
    glutInitWindowPosition(0, 0)

    # Open a window
    window =3D glutCreateWindow("Jeff Molofee's GL Code Tutorial ... NeHe=
 '99")



Quoting Fabrizio Pollastri <pol...@ir...>:

> Hi all,
>=20
> when I run this python script on a Debian/Linux Etch
>=20
> ----
> #!/usr/bin/python
>=20
> from OpenGL.GLUT import *
> import sys
>=20
> glutInit(sys.argv)
> glutCreateWindow("dri")
> glutMainLoop()
> ----
>=20
> I get the warning
>=20
> "
> freeglut (./dri.py): Unable to create direct context rendering for=20
> window 'dri'
> This may hurt performance.
> "
>=20
> and all my python code using OpenGL is slow.
>=20
> On the contrary the equivalent C code
>=20
> ----
> #include <GL/glut.h>
>=20
> int main (int argc, char **argv) {
> glutInit (&argc, argv);
> glutCreateWindow ("test");
> glutMainLoop ();
> return 0;
> }
> ----
>=20
> runs fine.
>=20
> The command "glxinfo | grep render"
> returns
>=20
> "
> direct rendering: Yes
> OpenGL renderer string: Mesa DRI G400 20050609 AGP 1x
> "
>=20
> and standard demos (glxgears) runs fine using DRI.
>=20
> Any help will be appreciated.
>=20
>=20
> Regards,
> F. Pollastri.
>=20
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>=20




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