commit 528241aa3835e2f1f052abeeaf891737712955a0
from: Christoph Lohmann <20h@r-36.net>
date: Fri Jun  3 13:02:32 2016 UTC

Use XftFontMatch in place of FcFontMatch.

git am -s didn't like your patch:

From: Mark Edgar <medgar123@gmail.com>

XftFontMatch calls XftDefaultSubstitute which configures various match
properties according to the user's configured Xft defaults (xrdb) as well as
according to the current display and screen. Most importantly, the screen DPI
is computed [1]. Without this, st uses a "default" DPI of 75 [2].

[1]: https://cgit.freedesktop.org/xorg/lib/libXft/tree/src/xftdpy.c?id=libXft-2.3.2#n535
[2]: https://cgit.freedesktop.org/fontconfig/tree/src/fcdefault.c?id=2.11.1#n255

commit - 60aeb37edb8c5280d31b6b3c801d09c7a5fdca76
commit + 528241aa3835e2f1f052abeeaf891737712955a0
blob - 6736464f7ecc2819cc9c22622149eb6ef6701c91
blob + 2594c6506c3d221626490e59605724a020d92c43
--- st.c
+++ st.c
@@ -3279,7 +3279,7 @@ xloadfont(Font *f, FcPattern *pattern)
 	FcResult result;
 	XGlyphInfo extents;
 
-	match = FcFontMatch(NULL, pattern, &result);
+	match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
 	if (!match)
 		return 1;
 
@@ -3345,9 +3345,6 @@ xloadfonts(char *fontstr, double fontsize)
 		defaultfontsize = usedfontsize;
 	}
 
-	FcConfigSubstitute(0, pattern, FcMatchPattern);
-	FcDefaultSubstitute(pattern);
-
 	if (xloadfont(&dc.font, pattern))
 		die("st: can't open font %s\n", fontstr);