XtAddExposureToRegion(X3xt) X Version 11 (Release 6.1)
XtAddExposureToRegion --
merge exposure events into a region
Synopsis
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.
References
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
30 January 1998
© 1998 The Santa Cruz Operation, Inc. All rights reserved.