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#include <u.h>
#include <libc.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));
}