From 87ea222e7f73b2250727e827ed5d4bb002bfdc6b Mon Sep 17 00:00:00 2001
From: tanyulong <tanyulong@kylinos.cn>
Date: Fri, 29 Oct 2021 10:25:53 +0800
Subject: [PATCH] add set dpi

---
 ukui-greeter/greeter/main.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/ukui-greeter/greeter/main.cpp b/ukui-greeter/greeter/main.cpp
index 76cfbf0..0fc09da 100755
--- a/ukui-greeter/greeter/main.cpp
+++ b/ukui-greeter/greeter/main.cpp
@@ -34,6 +34,7 @@
 #include <X11/Xlib.h>
 #include <X11/XKBlib.h>
 #include <X11/keysym.h>
+#include <X11/Xatom.h>
 #include <X11/cursorfont.h>
 #include <X11/extensions/Xrandr.h>
 #include "globalv.h"
@@ -108,8 +109,27 @@ void x11_get_screen_size(int *width,int *height)
 
 }
 
+void XsettingsHidpi()
+{
+    Display    *dpy;
+    int w,h;
+    x11_get_screen_size (&w, &h);
+    dpy = XOpenDisplay (NULL);
+    if(h > 2000){
+	    XChangeProperty(dpy, RootWindow (dpy, 0),
+			    XA_RESOURCE_MANAGER, XA_STRING, 8, PropModeReplace, (unsigned char *) "Xft.dpi:	192\n", 13);
+    }else{
+	    XChangeProperty(dpy, RootWindow (dpy, 0),
+			    XA_RESOURCE_MANAGER, XA_STRING, 8, PropModeReplace, (unsigned char *) "Xft.dpi:	96\n", 12);
+    }
+    XCloseDisplay (dpy);
+}
+
+
+
 int main(int argc, char *argv[])
 {
+    XsettingsHidpi ();
     qInstallMessageHandler(outputMessage);
 
 #if(QT_VERSION>=QT_VERSION_CHECK(5,6,0))
-- 
2.30.0