NAME¶
XtAddExposureToRegion - merge exposure events into a region
SYNTAX¶
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
Expose or
GraphicsExpose event,
XtAddExposureToRegion returns without an
error and without modifying region.
This function is used by the exposure compression mechanism (see Section 7.9.3).
SEE ALSO¶
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
