From 817004646d6b7a8b79cac9c847667028d49b6ccf Mon Sep 17 00:00:00 2001
From: Grigori Goronzy <greg@blackbox>
Date: Tue, 1 Sep 2009 03:09:17 +0200
Subject: Handle illegal \a tags like VSFilter

Treat the illegal \a value 8 like 5 for compatibility with VSFilter.
---
 libass/ass_render.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libass/ass_render.c b/libass/ass_render.c
index 514dfbe..fe5114a 100644
--- a/libass/ass_render.c
+++ b/libass/ass_render.c
@@ -1295,7 +1295,8 @@ static char *parse_tag(ASS_Renderer *render_priv, char *p, double pwr)
     } else if (mystrcmp(&p, "a")) {
         int val;
         if (mystrtoi(&p, &val) && val)
-            render_priv->state.alignment = val;
+            // take care of a vsfilter quirk: handle illegal \a8 like \a5
+            render_priv->state.alignment = (val == 8) ? 5 : val;
         else
             render_priv->state.alignment =
                 render_priv->state.style->Alignment;
-- 
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