35 lines
983 B
C
35 lines
983 B
C
/*
|
|
* This file is part of the UCB release of Plan 9. It is subject to the license
|
|
* terms in the LICENSE file found in the top-level directory of this
|
|
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
|
|
* part of the UCB release of Plan 9, including this file, may be copied,
|
|
* modified, propagated, or distributed except according to the terms contained
|
|
* in the LICENSE file.
|
|
*/
|
|
|
|
#include <u.h>
|
|
#include <lib9.h>
|
|
#include <draw.h>
|
|
|
|
int
|
|
rectclip(Rectangle *rp, Rectangle b) /* first by reference, second by value */
|
|
{
|
|
Rectangle *bp = &b;
|
|
/*
|
|
* Expand rectXrect() in line for speed
|
|
*/
|
|
if((rp->min.x<bp->max.x && bp->min.x<rp->max.x &&
|
|
rp->min.y<bp->max.y && bp->min.y<rp->max.y)==0)
|
|
return 0;
|
|
/* They must overlap */
|
|
if(rp->min.x < bp->min.x)
|
|
rp->min.x = bp->min.x;
|
|
if(rp->min.y < bp->min.y)
|
|
rp->min.y = bp->min.y;
|
|
if(rp->max.x > bp->max.x)
|
|
rp->max.x = bp->max.x;
|
|
if(rp->max.y > bp->max.y)
|
|
rp->max.y = bp->max.y;
|
|
return 1;
|
|
}
|