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Re: Dialog Disappearance

on 2000.12.17 12.56, Roland Gustafsson at email@hidden wrote:

> On 12/17/00 12:39 PM, Erik Rufelt wrote:
>
>> In all my fullscreen OpenGL apps dialogs sometimes doesn't show up, it goes
>> for both ISpConfigure() dialog and other dialog windows... has this got
>> something to do with double buffering and it ending up in the back buffer or
>> something?
>> How can I fix this?
>
> Not sure this is a 100% solution, but it works for me:
>
> Track aglSwapBuffers with a global Boolean
>
> Boolean gSwapBufferTracker=0;
>
> ...
>
> draw page
>
> aglSwapBuffers(context);
> gSwapBufferTracker ^= 1;
>
> ...
>
> When you want to display a dialog, simply check gSwapBufferTracker, if 1,
> you'll need to aglSwapBuffers to return to the original front buffer.

Hey, this is *just* like a bug that I've described and submitted to DTS
almost two months ago (although in my case the problem involves drawing to
the GL_FRONT buffer, not dialogs, but I figure that the cause of the problem
is likely the same). The last that I had heard, they had been able to
reproduce it but were having trouble tracking down the cause.

(If anyone from Apple is interested, the DTS tag is : 1380845)

Have you (Roland) tested this on non-ATI contexts (eg Voodoo)? I see
slightly different behaviours there.

--
Bila Kiss telno. 604.264.6113
Arborealis Research email. email@hidden
3322 W 36th Avenue
Vancouver, BC, CANADA V6N 2R9

References: 
 >Re: Dialog Disappearance (From: Roland Gustafsson <email@hidden>)



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