jehanne/sys/src/lib/draw/border.c

31 lines
966 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>
void
border(Image *im, Rectangle r, int i, Image *color, Point sp)
{
if(i < 0){
r = insetrect(r, i);
sp = addpt(sp, Pt(i,i));
i = -i;
}
draw(im, Rect(r.min.x, r.min.y, r.max.x, r.min.y+i),
color, nil, sp);
draw(im, Rect(r.min.x, r.max.y-i, r.max.x, r.max.y),
color, nil, Pt(sp.x, sp.y+Dy(r)-i));
draw(im, Rect(r.min.x, r.min.y+i, r.min.x+i, r.max.y-i),
color, nil, Pt(sp.x, sp.y+i));
draw(im, Rect(r.max.x-i, r.min.y+i, r.max.x, r.max.y-i),
color, nil, Pt(sp.x+Dx(r)-i, sp.y+i));
}