[Bf-committers] Pop-up menus

[Ton Roosendaal]

Hi,

On our irc channel I went with Daniel over possible strategies to  
review the swapbuffers method as used in Blender. Most likely we'll  
find a system that:

- not uses any frontbuffer drawing or reading
- will preserve a fixed updated backbuffer always
- not call a system swapbuffer, unless that is guarenteed a _copy_ of  
back to front buffer
   (the latter is true for OSX, and for several recent 3d cards
- find good cross platform code (or extension calls) that provide a  
partial window copy, this to copy headers, buttons, menus or single  
sub-windows to front in Blender

With all different kinds of graphics systems, still not an easy task to  
accomplish. It's being evaluated still, feedback/research on what a  
fast & simple & compliant copybuffers would be still welcome.

It's also quite a rewrite for Blender, so something to carefully  
coordinate. :)

-Ton-


On Monday, Apr 26, 2004, at 11:11 Europe/Amsterdam, john tuffen wrote:

> (This is probably a question more for Martin, but anyway...)
>
> I'm going over the UI code at the moment (interface*.c etc.) to remove  
> writes
> to the front buffer (since this is the thing which seems to slow down  
> the ATI
> Radeon). I coded a quick hacky fix where I called "myswapbuffers()" at
> appropriate places in order to display pop-ups, tooltips etc.  
> Unfortunately,
> this causes the screen to flash horribly in certain cases (On my  
> Radeon, when
> in Vertex paint mode; on an Intel integrated-graphics chipset, the  
> screen
> flickers at every opportunity!).
>
> Anyway, I have taken out the calls to myswapbuffers and made a few  
> other
> changes and now the buttons do the right thing when pressed/hovered  
> over, but
> I can't figure out how to get pop-ups/tooltips to display... Anybody  
> got any
> hints? I could wade through the code I guess, but it might be quicker  
> just to
> ask!!
>
> Thanks,
>
> john..
>
> --
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------------------------------------------------------------------------ 
--
Ton Roosendaal  Blender Foundation ton@blender.org  
http://www.blender.org