From 5271d1a2e1c7dc80e39644fbbdcdc2fe4c53aaaf Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 13 Sep 2013 15:17:09 +0530
Subject: [PATCH] Recognize EMF images

---
 src/calibre/utils/imghdr.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/calibre/utils/imghdr.py b/src/calibre/utils/imghdr.py
index c4070f072e..fc8d0942d7 100644
--- a/src/calibre/utils/imghdr.py
+++ b/src/calibre/utils/imghdr.py
@@ -10,10 +10,10 @@ def what(file, h=None):
     if h is None:
         if isinstance(file, basestring):
             f = open(file, 'rb')
-            h = f.read(32)
+            h = f.read(44)
         else:
             location = file.tell()
-            h = file.read(32)
+            h = file.read(44)
             file.seek(location)
             f = None
     else:
@@ -120,6 +120,12 @@ def test_bmp(h, f):
 
 tests.append(test_bmp)
 
+def test_emf(h, f):
+    if h[:4] == b'\x01\0\0\0' and h[40:44] == b' EMF':
+        return 'emf'
+
+tests.append(test_emf)
+
 #--------------------#
 # Small test program #
 #--------------------#