1 ed7c8e8d 2003-09-30 devnull #include <u.h>
 2 ed7c8e8d 2003-09-30 devnull #include <libc.h>
 3 ed7c8e8d 2003-09-30 devnull #include <draw.h>
 4 ed7c8e8d 2003-09-30 devnull 
 5 ed7c8e8d 2003-09-30 devnull int
 6 ed7c8e8d 2003-09-30 devnull rectclip(Rectangle *rp, Rectangle b)		/* first by reference, second by value */
 7 ed7c8e8d 2003-09-30 devnull {
 8 ed7c8e8d 2003-09-30 devnull 	Rectangle *bp = &b;
 9 ed7c8e8d 2003-09-30 devnull 	/*
10 ed7c8e8d 2003-09-30 devnull 	 * Expand rectXrect() in line for speed
11 ed7c8e8d 2003-09-30 devnull 	 */
12 ed7c8e8d 2003-09-30 devnull 	if((rp->min.x<bp->max.x && bp->min.x<rp->max.x &&
13 ed7c8e8d 2003-09-30 devnull 	    rp->min.y<bp->max.y && bp->min.y<rp->max.y)==0)
14 ed7c8e8d 2003-09-30 devnull 		return 0;
15 ed7c8e8d 2003-09-30 devnull 	/* They must overlap */
16 ed7c8e8d 2003-09-30 devnull 	if(rp->min.x < bp->min.x)
17 ed7c8e8d 2003-09-30 devnull 		rp->min.x = bp->min.x;
18 ed7c8e8d 2003-09-30 devnull 	if(rp->min.y < bp->min.y)
19 ed7c8e8d 2003-09-30 devnull 		rp->min.y = bp->min.y;
20 ed7c8e8d 2003-09-30 devnull 	if(rp->max.x > bp->max.x)
21 ed7c8e8d 2003-09-30 devnull 		rp->max.x = bp->max.x;
22 ed7c8e8d 2003-09-30 devnull 	if(rp->max.y > bp->max.y)
23 ed7c8e8d 2003-09-30 devnull 		rp->max.y = bp->max.y;
24 ed7c8e8d 2003-09-30 devnull 	return 1;
25 ed7c8e8d 2003-09-30 devnull }