XtAddExposureToRegion3x
Merge exposure events into a region
Usage
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>). |
Overview
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).
Releases
8 releases since Debian 1.1 (Buzz); the text changed 4 times.