XtAddExposureToRegion(3) XT FUNCTIONS XtAddExposureToRegion(3)
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 InterfaceX Version 11 libXt 1.1.5 XtAddExposureToRegion(3)
