From 3d717831cb3b91064fc6d261fa0d94d548d9bd6a Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Tue, 26 Nov 2019 20:26:22 +0100
Subject: [PATCH] Add the same fonts.conf change that OS X has to Windows so
 that it, too, can do fake bold/italic (slanted/oblique).  It looks like this
 is necessary to see italics with the bundled fonts.

---
 fonts/fonts.conf.windows | 62 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/fonts/fonts.conf.windows b/fonts/fonts.conf.windows
index 2b1c0ae4d..a3820b427 100644
--- a/fonts/fonts.conf.windows
+++ b/fonts/fonts.conf.windows
@@ -1,5 +1,67 @@
 <fontconfig>
 <dir>C:\windows\fonts</dir>
 <cachedir>~/AppData/Local/Temp/fontconfig</cachedir>
+
+<!--
+ Artificial oblique for fonts without an italic or oblique version
+ -->
+
+	<match target="font">
+		<!-- check to see if the font is roman -->
+		<test name="slant">
+			<const>roman</const>
+		</test>
+		<!-- check to see if the pattern requested non-roman -->
+		<test target="pattern" name="slant" compare="not_eq">
+			<const>roman</const>
+		</test>
+		<!-- multiply the matrix to slant the font -->
+		<edit name="matrix" mode="assign">
+			<times>
+				<name>matrix</name>
+				<matrix><double>1</double><double>0.2</double>
+					<double>0</double><double>1</double>
+				</matrix>
+			</times>
+		</edit>
+		<!-- pretend the font is oblique now -->
+		<edit name="slant" mode="assign">
+			<const>oblique</const>
+		</edit>
+		<!-- and disable embedded bitmaps for artificial oblique -->
+		<edit name="embeddedbitmap" mode="assign">
+			<bool>false</bool>
+		</edit>
+	</match>
+
+<!--
+ Synthetic emboldening for fonts that do not have bold face available
+ -->
+
+	<match target="font">
+		<!-- check to see if the font is just regular -->
+		<test name="weight" compare="less_eq">
+			<const>medium</const>
+		</test>
+		<!-- check to see if the pattern requests bold -->
+		<test target="pattern" name="weight" compare="more">
+			<const>medium</const>
+		</test>
+		<!--
+		  set the embolden flag
+		  needed for applications using cairo, e.g. gucharmap, gedit, ...
+		-->
+		<edit name="embolden" mode="assign">
+			<bool>true</bool>
+		</edit>
+		<!--
+		 set weight to bold
+		 needed for applications using Xft directly, e.g. Firefox, ...
+		-->
+		<edit name="weight" mode="assign">
+			<const>bold</const>
+		</edit>
+	</match>
+
 </fontconfig>
 
-- 
2.30.2