Manpages - XCreateRegion.3

XCreateRegion, XSetRegion, XDestroyRegion - create or destroy regions

Region XCreateRegion (void );

int XSetRegion ( Display */display/ , GC gc , Region r );

int XDestroyRegion ( Region r );

display

Specifies the connection to the X server.

gc

Specifies the GC.

(no term)

Specifies the region.

The XCreateRegion function creates a new empty region.

The XSetRegion function sets the clip-mask in the GC to the specified region. The region is specified relative to the drawable’s origin. The resulting GC clip origin is implementation-dependent. Once it is set in the GC, the region can be destroyed.

The XDestroyRegion function deallocates the storage associated with a specified region.

XEmptyRegion(3), XIntersectRegion(3)
Xlib - C Language X Interface