From e051abe473badd3d29f398ba4ed522c437e503b6 Mon Sep 17 00:00:00 2001
From: Grigori Goronzy <greg@blackbox>
Date: Thu, 18 Feb 2010 07:14:23 +0100
Subject: Calculate vertical layout ascender/descender

Calculate ascender for rotated glyphs from the maximum advance width.
Works OK usually, but screws up with fonts that miss this information.
---
 libass/ass_font.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libass/ass_font.c b/libass/ass_font.c
index 109390f..6f1f4b7 100644
--- a/libass/ass_font.c
+++ b/libass/ass_font.c
@@ -286,6 +286,9 @@ void ass_font_get_asc_desc(ASS_Font *font, uint32_t ch, int *asc,
                 *asc = FT_MulFix(face->ascender, y_scale);
                 *desc = FT_MulFix(-face->descender, y_scale);
             }
+            if (font->desc.vertical) {
+                *asc = FT_MulFix(face->max_advance_width, y_scale);
+            }
             return;
         }
     }
-- 
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