intel driver

[Stephane Marchesin]

On Fri, Jul 4, 2008 at 1:11 PM, Luca Romagnoli <luca at geode3d.com> wrote:
> Hi,
> i have a motherboard mounting an intel G33. I using intel driver 2.2.1
> on ubuntu 8.04 and i have a problem with opengl procedural texture.
>
> this is the scenario: i have 2 windows, one is an opengl window and the
> other is a generic window(for instance a terminal window).
> during the pipe line i render and i store the result in a procedural
> texture, so i'll use this texture to the final render.
>
> the problem is:
> if the generic window is over the portion of the opengl window that i
> use to render the procedural texture so the result will be wrong.
> it'seams the render is locked on the part of the opengl window
> overlapped by the other window, so the procedural texture never change.
> is it possible?
>
> note if i lunch the same application on a pc (ubuntu 8.04) with a nvdia
> the problem don't happen.
> have you got some idea?

This is not a bug, you should read the opengl/glx spec. The contents
of hidden opengl windows is not guaranteed to be correct. Look at
pbuffers/fbos instead to fix it.

Stephane