[Bf-committers] Slow menu problem fix...

[Ton Roosendaal]

Hi,

I went over the UI code, and removed all frontbuffer drawing from it. 
Instead there's a system that only copys pixels from the back to 
frontbuffer and back.

The only frontbuffer drawing now is with glCopyPixels(), which *really* 
should work on most systems. I hope. :)

Since I suspect that especially drawing commands (lines, polys, text) 
was causing the slowdown, this could be method how to have speedy UI 
again for many ATI cards.

Attached you can find a patch. Apply it in blender/source/blender/

PLease note that only the pulldown menus have coded with new system. 
The normal buttons don't refresh now on mouse-over or click.

-Ton-

(BTW apart from speed & clean code, this method also will allow usage 
of transparant 'overlay' messages or menus). Or using antialiased 
drawing.)

(BTW2 it should be tested on sgi/sun workstations too, since they have 
different swapbuffer method... is that possible?)


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Ton Roosendaal  Blender Foundation ton at blender.org  
http://www.blender.org