Peter Nyboer

this patch does a shared context rendering for a preview window, and also does a texture readback for recording. The Output window has fsaa on. This all is fine on my XP box with a 6800GS card, and fine on a mac mini, and fine on my G4 desktop (radeon 9800). On a dell inspiron 6400 with a 256MB ATI x1400 graphics laptop, though, if fsaa is on, the texture readback doesn't work.

this patch does a shared context rendering for a preview window, and also does a texture readback for recording.  The Output window has fsaa on.  This all is fine on my XP box with a 6800GS card, and fine on a mac mini, and fine on my G4 desktop (radeon 9800).  On a dell inspiron 6400 with a 256MB ATI x1400 graphics laptop, though, if fsaa is on, the texture readback doesn't work.

fsaa-and-texture-readback-problem-jit-1-62rc1-xp

On Sep 25, 2006, at 3:21 PM, pnyboer wrote:

> this patch does a shared context rendering for a preview window, 

> and also does a texture readback for recording. The Output window 

> has fsaa on. This all is fine on my XP box with a 6800GS card, and 

> fine on a mac mini, and fine on my G4 desktop (radeon 9800). On a 

> dell inspiron 6400 with a 256MB ATI x1400 graphics laptop, though, 

> if fsaa is on, the texture readback doesn't work.

Sorry Peter, but this patch is kind of a mess. Please strip this 

down, and/or document further if you want us to look into the issue. 

Regardless, in situations like this which seem to be HW dependent and 

on XP, I would always first try updating the driver. However, with 

FSAA enabled there still might be issues with this card or driver and 

The next thing I'd try is sending the jit.gl.texture through an 

instance of jit.gl.slab for prior to readback. In general I would 

require this for texture readback, but it seems that some instances 

>
> this patch does a shared context rendering for a preview window,  
> and also does a texture readback for recording.  The Output window  
> has fsaa on.  This all is fine on my XP box with a 6800GS card, and  
> fine on a mac mini, and fine on my G4 desktop (radeon 9800).  On a  
> dell inspiron 6400 with a 256MB ATI x1400 graphics laptop, though,  
> if fsaa is on, the texture readback doesn't work.

Sorry Peter, but this patch is kind of a mess. Please strip this  
down, and/or document further if you want us to look into the issue.  
You need to help us help you.

Regardless, in situations like this which seem to be HW dependent and  
on XP, I would always first try updating the driver. However, with  
FSAA enabled there still might be issues with this card or driver and  
the texture copy.

The next thing I'd try is sending the jit.gl.texture through an  
instance of jit.gl.slab for prior to readback. In general I would  
require this for texture readback, but it seems that some instances  
work fine without that requirement.

ok, sorry for the mess. scary thing is, that IS a stripped down version :). But I will strip some more and post later.

i did try the gl.slab recommendation, and that improves things in general, however, i don't know if it fixes the problem on the Dell laptop. I will keep u posted....

ok, sorry for the mess.  scary thing is, that IS a stripped down version :).  But I will strip some more and post later.
drivers were updated, btw.
i did try the gl.slab recommendation, and that improves things in general, however, i don't know if it fixes the problem on the Dell laptop.  I will keep u posted....

fsaa and texture readback problem - Jit. 1.62rc1 XP