jehanne/sys/src/lib/memdraw/poly.c

34 lines
896 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 <libc.h>
#include <draw.h>
#include <memdraw.h>
#include <memlayer.h>
void
mempoly(Memimage *dst, Point *vert, int nvert, int end0, int end1, int radius, Memimage *src, Point sp, int op)
{
int i, e0, e1;
Point d;
if(nvert < 2)
return;
d = subpt(sp, vert[0]);
for(i=1; i<nvert; i++){
e0 = e1 = Enddisc;
if(i == 1)
e0 = end0;
if(i == nvert-1)
e1 = end1;
memline(dst, vert[i-1], vert[i], e0, e1, radius, src, addpt(d, vert[i-1]), op);
}
}