From: Grigori Goronzy <greg@blackbox>
Date: Mon, 4 Jul 2011 08:00:33 +0000 (+0200)
Subject: Fix: VSFilter compat: don't render shadow when glyph/border invisible
X-Git-Tag: 0.10.0~65
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d64db394cb7b685f4f4d2775a35b358cf7bd0b9e;p=libass

Fix: VSFilter compat: don't render shadow when glyph/border invisible

Use the alpha channel, not the red channel. Fixes commit f92830.

Original patch by lachs0r.
---

diff --git a/libass/ass_render.c b/libass/ass_render.c
index 5c5ced3..aaa5778 100644
--- a/libass/ass_render.c
+++ b/libass/ass_render.c
@@ -1288,7 +1288,7 @@ get_bitmap_glyph(ASS_Renderer *render_priv, GlyphInfo *info)
 
     // VSFilter compatibility: invisible fill and no border?
     // In this case no shadow is supposed to be rendered.
-    if (!info->border && (info->c[0] >> 24) == 0xFF)
+    if (!info->border && (info->c[0] & 0xFF) == 0xFF)
         info->bm_s = 0;
 }