Configuring For Swap Sync - Nvidia Frame Synchronization User Manual

C 3
HAPTER
Using the OpenGL Extensions
and specifying every nth source pulse to use for the trigger pulse. The minimum value
is 1. The maximum value is 6. As an example, if a value of 2 is used, then every other
source pulse would generate a trigger pulse.
To query the sample value, call wglGetGenlockSampleRateI3D().
• Set an Optional Delay Value
If the next display downstream requires a slight delay, delay the trigger pulse (in
pixels) by calling
wglGenlockSourceDelayI3D()
and specify a delay. The minimum delay value is 0. The maximum delay value is the
number of pixel clocks needed to display an entire frame.
To determine the maximum delay value:
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Configuring for Swap Sync

Configuring Swap Groups
You can assign an OpenGL window to a swap group. There is a maximum number of
allowable swap groups that can be created for any particular implementation.
• To determine the maximum swap group number, call
QueryMaxSwapGroupsNV()
• To assign a window to a swap group, call
JoinSwapGroupNV()
and specify the swap group number.
If hDC is already a member of a different group, it is implicitly removed from that
group. If the swap group number is zero, the hDC is removed from the current group.
To query the current swap group, call QuerySwapGroupNV().
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Call the function wglQueryGenlockMaxSourceDelayI3D
values for maxLineDelay and maxPixelDelay.
Calculate the maximum delay using the equation
maxDelay = (maxLineDelay) x (maxPixelDelay)
Frame Synchronization User's Guide– Version 3.0
()
and obtain the
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