Sets the clipping rectangle for a surface\&. When this surface is the destination of a blit, only the area within the clip rectangle will be drawn into\&.
.PP
The rectangle pointed to by \fBrect\fR will be clipped to the edges of the surface so that the clip rectangle for a surface can never fall outside the edges of the surface\&.
.PP
If \fBrect\fR is \fBNULL\fP the clipping rectangle will be set to the full size of the surface\&.