shithub: purgatorio

ref: babf901b4a508c3ec5d1f89655f10377bbdf9637
dir: /libmemdraw/poly.c/

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#include "lib9.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);
	}
}