1 #include <u.h> 2 #include <libc.h> 3 #include <draw.h> 4 5 int rectclip(Rectangle * rp,Rectangle b)6rectclip(Rectangle *rp, Rectangle b) /* first by reference, second by value */ 7 { 8 Rectangle *bp = &b; 9 /* 10 * Expand rectXrect() in line for speed 11 */ 12 if((rp->min.x<bp->max.x && bp->min.x<rp->max.x && 13 rp->min.y<bp->max.y && bp->min.y<rp->max.y)==0) 14 return 0; 15 /* They must overlap */ 16 if(rp->min.x < bp->min.x) 17 rp->min.x = bp->min.x; 18 if(rp->min.y < bp->min.y) 19 rp->min.y = bp->min.y; 20 if(rp->max.x > bp->max.x) 21 rp->max.x = bp->max.x; 22 if(rp->max.y > bp->max.y) 23 rp->max.y = bp->max.y; 24 return 1; 25 } 26