From cc0d41d2e281cb758c6e2f523f9437ee05b111a4 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 13 Sep 2013 17:11:12 +0530
Subject: [PATCH] ...

---
 src/calibre/utils/wmf/emf.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/calibre/utils/wmf/emf.py b/src/calibre/utils/wmf/emf.py
index 87a5863cbd..53b154a00b 100644
--- a/src/calibre/utils/wmf/emf.py
+++ b/src/calibre/utils/wmf/emf.py
@@ -13,6 +13,7 @@ from collections import namedtuple
 from calibre.utils.wmf import create_bmp_from_dib, to_png
 
 # Record types {{{
+# See: http://msdn.microsoft.com/en-us/library/cc231166.aspx
 RECORD_TYPES = {
     'EMR_BITBLT' : 0x4C,
     'EMR_STRETCHBLT' : 0x4D,
@@ -27,6 +28,7 @@ RECORD_TYPES = {
 }
 RECORD_RMAP = {v:k for k, v in RECORD_TYPES.iteritems()}
 
+# See http://msdn.microsoft.com/en-us/library/cc230601.aspx
 StretchDiBits = namedtuple(
     'StretchDiBits', 'left top right bottom x_dest y_dest x_src y_src cx_src'
     ' cy_src bmp_hdr_offset bmp_header_size bmp_bits_offset'