File gnome-settings-daemon-round-xft_dpi-to-integer.patch of Package gnome-settings-daemon.11222

From 8d889e9545665054e4054ab21467b80e51fe1b49 Mon Sep 17 00:00:00 2001
From: Yifan J <yfjiang@suse.com>
Date: Thu, 25 Apr 2019 16:09:04 +0800
Subject: [PATCH] xsettings: Round the Xft.dpi setting to an integer

When using gnome-tweaks to set a text scale factor that is not a
multiple of 0.25 (e.g. 1.1), Xft.dpi would be calculated as a
floating point number, which breaks the fdo spec:

https://www.freedesktop.org/wiki/Specifications/XSettingsRegistry/

Although GNOME could handle the floating point Xft.dpi, graphical
programs restrictively followed the above-mentioned spec would be
influenced negatively. For example, QT applications (running on
GNOME desktop) may ignore text scaling factor when Xft.dpi was
calculated as a floating point number:

https://bugreports.qt.io/browse/QTBUG-64738

The patch at the same time has few impact to GNOME itself.
---
 plugins/xsettings/gsd-xsettings-manager.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/plugins/xsettings/gsd-xsettings-manager.c b/plugins/xsettings/gsd-xsettings-manager.c
index 3b1ebc3a..c3ac7892 100644
--- a/plugins/xsettings/gsd-xsettings-manager.c
+++ b/plugins/xsettings/gsd-xsettings-manager.c
@@ -814,8 +814,8 @@ xft_settings_set_xresources (GsdXftSettings *settings)
 
         g_debug("xft_settings_set_xresources: orig res '%s'", add_string->str);
 
-        update_property (add_string, "Xft.dpi",
-                                g_ascii_dtostr (dpibuf, sizeof (dpibuf), (double) settings->scaled_dpi / 1024.0));
+        g_snprintf (dpibuf, sizeof (dpibuf), "%d", (int) (settings->scaled_dpi / 1024.0 + 0.5));
+        update_property (add_string, "Xft.dpi", dpibuf);
         update_property (add_string, "Xft.antialias",
                                 settings->antialias ? "1" : "0");
         update_property (add_string, "Xft.hinting",
-- 
2.21.0
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