XtAddExposureToRegion(3) XT FUNCTIONS XtAddExposureToRegion(3)
NAME
XtAddExposureToRegion - merge exposure events into a region
SYNTAX
#include <X11/Intrinsic.h>
void XtAddExposureToRegion(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 Ex-
pose or GraphicsExpose event, XtAddExposureToRegion returns without an
error and without modifying region.
This function is used by the exposure compression mechanism (see Sec-
tion 7.9.3).
SEE ALSO
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
X Version 11 libXt 1.2.1 XtAddExposureToRegion(3)
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