Re: OpenGL and Tiger
Re: OpenGL and Tiger
- Subject: Re: OpenGL and Tiger
- From: Shawn Erickson <email@hidden>
- Date: Mon, 16 May 2005 07:45:43 -0700
On May 16, 2005, at 6:31 AM, Shaun Wexler wrote:
On May 16, 2005, at 2:16 AM, Lorenzo wrote:
Glad to know there is workaround.
I launch Quartz Debug and mark the radio button
"Disable Beam Synchronization". Now my application works well, the
refreshing problem has gone. Then I quit Quartz Debug and my
application's
problem occurs again. I launch again Quartz Debug and strangely
the radio
button "Disable Beam Synchronization" is not marked anymore.
How to set it permanently? And, most of all,
do I have to say to all of my clients to do this settings by
themselves?
I hope no.
Quartz Debug resets the mode to "automatic" when it quits. The
Window Server debug state is global for the session, not per-
process or per-window. If your app disables it, it should re-
enable it upon quit; you should present a warning dialog to the
user and let them make the decision. Here is the necessary code:
extern void CGSSetDebugOptions(int);
extern void CGSDeferredUpdates(int);
typedef enum {
disableBeamSync = 0,
automaticBeamSync = 1,
forcedBeamSyncMode = 2
} beamSyncMode;
beamSyncOption mode = disableBeamSync;
CGSSetDebugOptions(mode ? 0 : 0x08000000);
CGSDeferredUpdates(mode);
All disclaimers shall apply. ;)~
I'll add a disclaimer... note that Quartz 2D Extreme is something
Apple has available for developers to test with and I bet this beam
synchronization mode may allow some level of optimization to take
place in relation to Q2DX. So be careful depending on this being set
certain ways until we hear more from Apple in this space (likely
better discussed on the Quartz list, so let stop with the cross
posting and take it just one list).
I bet at WWDC 2005 Apple will outline things at a more detailed level.
-Shawn
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