From a268eb52d10d1196836c0016ba2c4fafc61b76d0 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 11 Nov 2019 09:27:27 +0530
Subject: [PATCH] PDF Output: Fix an error when using fonts with vertical
 metrics. Fixes #1852036 [fail to convert azw3 to pdf in calibre
 4.3](https://bugs.launchpad.net/calibre/+bug/1852036)

---
 src/calibre/utils/fonts/sfnt/container.py | 3 ++-
 src/calibre/utils/fonts/sfnt/head.py      | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/calibre/utils/fonts/sfnt/container.py b/src/calibre/utils/fonts/sfnt/container.py
index 394a9572ac..79d879692b 100644
--- a/src/calibre/utils/fonts/sfnt/container.py
+++ b/src/calibre/utils/fonts/sfnt/container.py
@@ -14,7 +14,7 @@ from calibre.utils.fonts.sfnt.errors import UnsupportedFont
 from calibre.utils.fonts.sfnt.glyf import GlyfTable
 from calibre.utils.fonts.sfnt.gsub import GSUBTable
 from calibre.utils.fonts.sfnt.head import (
-    HeadTable, HorizontalHeader, OS2Table, PostTable
+    HeadTable, HorizontalHeader, OS2Table, PostTable, VerticalHeader
 )
 from calibre.utils.fonts.sfnt.kern import KernTable
 from calibre.utils.fonts.sfnt.loca import LocaTable
@@ -29,6 +29,7 @@ class Sfnt(object):
     TABLE_MAP = {
         b'head' : HeadTable,
         b'hhea' : HorizontalHeader,
+        b'vhea' : VerticalHeader,
         b'maxp' : MaxpTable,
         b'loca' : LocaTable,
         b'glyf' : GlyfTable,
diff --git a/src/calibre/utils/fonts/sfnt/head.py b/src/calibre/utils/fonts/sfnt/head.py
index a9a5c69113..41e38dd1d4 100644
--- a/src/calibre/utils/fonts/sfnt/head.py
+++ b/src/calibre/utils/fonts/sfnt/head.py
@@ -99,7 +99,7 @@ class HorizontalHeader(UnknownTable):
         self.left_side_bearings = a[1::2]
 
 
-class VericalHeader(UnknownTable):
+class VerticalHeader(UnknownTable):
 
     version_number = FixedProperty('_version_number')