From fc0b84c7b230f35dcf3be4695d6d45142922ed8c Mon Sep 17 00:00:00 2001
From: "Dr.Smile" <vabnick@gmail.com>
Date: Thu, 15 Jan 2015 20:53:57 +0300
Subject: Fix rare edge-case bug in rasterizer

---
 libass/ass_rasterizer.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'libass')

diff --git a/libass/ass_rasterizer.c b/libass/ass_rasterizer.c
index 84f9a88..ee19ad4 100644
--- a/libass/ass_rasterizer.c
+++ b/libass/ass_rasterizer.c
@@ -669,8 +669,11 @@ static int rasterizer_fill_level(ASS_Rasterizer *rst,
         return 1;
     }
     if (n == 1) {
+        static const int test = SEGFLAG_UL_DR | SEGFLAG_EXACT_LEFT;
+        if (((line->flags & test) != test) == !(line->flags & SEGFLAG_DN))
+            winding++;
+
         int flag = 0;
-        if (line->c < 0)winding++;
         if (winding)
             flag ^= 1;
         if (winding - 1)
-- 
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