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