X Version 11 (Release 5)
XtAddExposureToRegion(Xt)
XtAddExposureToRegion --
merge exposure events into a region
Syntax
void XtAddExposureToRegion(event, region)
XEvent event;
Region region;
Arguments
event-
Specifies a pointer to the Expose or
GraphicsExpose event.
region-
Specifies the region object (as defined in
<X11/Xutil.h>).
Description
The XtAddExposureToRegion
function computes the union of the rectangle defined by the exposure
event and the specified region.
Then, it stores the results back in region.
If the event argument is not an
Expose or GraphicsExpose event,
XtAddExposureToRegion
returns without an error and without modifying region.
This function is used by the exposure compression mechanism.
See Section 7.10.3 of X Toolkit Intrinsics - C Language Interface.
See also
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
© 2003 X Toolkit Intrinsics (Xt)
SCO OpenServer Release 5.0.7 -- 11 February 2003