I'm not sure if this is the right mailing list for this question, but
I know I'd get yelled at if I cross-posted...
My application often renders incorrectly when coalesced updates are
on. Tech Note 2133 tells some cases in which one coalesced updates
might impact performance, but does not explain why you'd see the
wrong stuff on the screen.
This is a Carbon application with a composited window. Certain
HIViews in the window are set up to draw with OpenGL. On
kEventControlDraw, the view renders, ending with aglSwapBuffers and
glFinish. What sometimes happens (maybe half the time) is that there
is a flash and the OpenGL content disappears, revealing whatever was
underneath it in the window. Turning off coalesced updates with
Quartz Debug makes this problem go away.
Any idea what I could do, other than turning off coalesced updates in my app?
--
James W. Walker, Innoventive Software LLC
<http://www.frameforge3d.com/>
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