From 28a011ca9ec1ac5cb13e4d7a0a06ce13b99eca87 Mon Sep 17 00:00:00 2001
From: TermiNexus <wyt18222152539wyt@163.com>
Date: Tue, 27 Oct 2026 21:42:19 +0800
Subject: [PATCH] fix(fonttools): stop the contour walk at the closing point

When an off-curve run ended on first_on, the walk set cur=first_on and
wrapped past it, repeating the contour and overflowing the edge table.
Break immediately after drawing the closing quadratic.
---
 vpsdk/fonttools/fonttools.vp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/vpsdk/fonttools/fonttools.vp b/vpsdk/fonttools/fonttools.vp
index 3009083..eb0fd74 100644
--- a/vpsdk/fonttools/fonttools.vp
+++ b/vpsdk/fonttools/fonttools.vp
@@ -240,6 +240,7 @@ def _build_contour(start: int, end: int):
                 cx = _px[nn]
                 cy = _py[nn]
                 cur = nn
+                if nn == first_on: break
             else:
                 mx: float = (_px[ctrl] + _px[nn]) / 2.0
                 my: float = (_py[ctrl] + _py[nn]) / 2.0