sub: add --osd-blur and --sub-text-blur options

These require bleeding edge libass (latest git version), and will be
ignored otherwise.

I'm not sure about the blur factor and scaling. The ASS/VSFilter
semantics for blur scaling are a bad mess. Might require further
investigation.

1 files changed, 1 insertions, 0 deletions

diff --git a/sub/sub.h b/sub/sub.h
index 660fd9ccc9..f062b3dddf 100644
--- a/sub/sub.h
+++ b/sub/sub.h
@@ -192,6 +192,7 @@ struct osd_style_opts {
     float spacing;
     int margin_x;
     int margin_y;
+    float blur;
 };
 
 extern const struct m_sub_options osd_style_conf;