[Bf-committers] Back Buffer Issues

[Ton Roosendaal]

Hi,

It's already there;
http://www.blender3d.org/cms/Linux.301.0.html#1961

Juan Julio; is it in your FAQ?   
http://www.freewebs.com/apollux/Blender-Linux-FAQ.sxw
Yann; can you make sure that's being included in releases? It's not in  
cvs you know...

Thanks!

On a development note; in theory Blender's buffering system could work  
with swap-exchange, as being used for some Suns and most SGIs. That's a  
different method as the "flipping" NVidia provides however, they  
created a method that automatically copies the minimim of changes to  
the display buffer, for games.

It's the reason we had to hack Blender with  
is_a_really_crappy_nvidia_card() in mywindow.c.
Alexander; it could be interesting to check if NVidia "flip" works with  
this hack in Linux too, just remove the ifdef WINDOWS there.

I don't know if we can somehow retrieve the used swapbuffering method  
from a driver...

-Ton-


On 7 Dec, 2004, at 8:15, Alexander Ewering wrote:

>
> On Thu, 2 Dec 2004, Ton Roosendaal wrote:
>
>> Hi,
>>
>> Blender likes the SwapCopy a lot. :)
>> This is becoming a standard in many (PC) cards now, and for some  
>> systems you cannot even tweak it... for example Macs only support  
>> this method.
>
> Just if anyone is interested, I just updated my Linux NVidia drivers  
> to the
> latest, and hooray - the old swapbuffers problem (flickering  
> buttonswindow/
> 3d view headers while rotating the view, etc.) was back!
>
> It turned out that it is a setting in nvidia-settings (the nvidia  
> control
> panel): OpenGL Settings -> Allow Flipping, which has to be turned off.
>
> So maybe this is worth adding to the Linux faq or something.
>
> Also, this of course means that any linux developer can use  
> nvidia-settings
> to switch this setting, and even make it work for switch instead of  
> copy ;)
>
> | alexander ewering              instinctive mediaworks
> | ae[@]instinctive[.]de   http://www[.]instinctive[.]de
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>
------------------------------------------------------------------------ 
--
Ton Roosendaal  Blender Foundation ton at blender.org  
http://www.blender.org