From 7cc30dada325bb8930bb4194e9d09b9742837ae5 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 15 Mar 2012 08:58:13 +0530
Subject: [PATCH] KF8 Input: Recognize OpenType embedded fonts as well. Fixes
 #954728 (Private bug)

---
 src/calibre/ebooks/mobi/utils.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/calibre/ebooks/mobi/utils.py b/src/calibre/ebooks/mobi/utils.py
index feca894a66..108c79b5fd 100644
--- a/src/calibre/ebooks/mobi/utils.py
+++ b/src/calibre/ebooks/mobi/utils.py
@@ -477,8 +477,9 @@ def read_font_record(data, extent=1040): # {{{
                 return ans
 
     ans['font_data'] = font_data
-    ans['ext'] = ('ttf' if font_data[:4] in {b'\0\1\0\0', b'true', b'ttcf'}
-                    else 'dat')
+    sig = font_data[:4]
+    ans['ext'] = ('ttf' if sig in {b'\0\1\0\0', b'true', b'ttcf'}
+                    else 'otf' if sig == b'OTTO' else 'dat')
 
     return ans
 # }}}