From dd479c06bf840bea7ffcf3006f66563acc70e878 Mon Sep 17 00:00:00 2001
From: Ilia Bozhinov <ammen99@gmail.com>
Date: Wed, 29 Jul 2020 14:08:22 +0200
Subject: [PATCH] xwayland: add support for setting scale factor

Needs to be set in the ready handler.

(cherry picked from commit 4c8cea6977a4d34c088a3b90ef2fc94eecccd673)
---
 metadata/core.xml     |  5 +++++
 src/view/xwayland.cpp | 11 +++++++++++
 2 files changed, 16 insertions(+)

diff --git a/metadata/core.xml b/metadata/core.xml
index 54e93dca9..2f8c03eb1 100644
--- a/metadata/core.xml
+++ b/metadata/core.xml
@@ -50,6 +50,11 @@
 			<_long>Enables or disables XWayland support, which allows X11 applications to be used.</_long>
 			<default>true</default>
 		</option>
+		<option name="xwayland_scale" type="int">
+			<_short>XWayland scale</_short>
+			<_long>Sets the global Xwayland scale factor.</_long>
+			<default>1</default>
+		</option>
 		<option name="max_render_time" type="int">
 			<_short>Maximum render time</_short>
 			<_long>Sets the compositor render delay in milliseconds, which allows applications to render with low latency.</_long>
diff --git a/src/view/xwayland.cpp b/src/view/xwayland.cpp
index db219a076..3476bde60 100644
--- a/src/view/xwayland.cpp
+++ b/src/view/xwayland.cpp
@@ -1064,6 +1064,7 @@ void wf::init_xwayland()
 #if WF_HAS_XWAYLAND
     static wf::wl_listener_wrapper on_created;
     static wf::wl_listener_wrapper on_ready;
+    static wf::option_wrapper_t<int> xwayland_scale{"core/xwayland_scale"};
 
     static signal_connection_t on_shutdown{[&] (void*)
         {
@@ -1098,6 +1099,16 @@ void wf::init_xwayland()
         wlr_xwayland_set_seat(xwayland_handle,
             wf::get_core().get_current_seat());
         xwayland_update_default_cursor();
+
+        wlr_xwayland_set_scale(xwayland_handle, xwayland_scale);
+    });
+
+    xwayland_scale.set_callback([&] ()
+    {
+        if (xwayland_handle)
+        {
+            wlr_xwayland_set_scale(xwayland_handle, xwayland_scale);
+        }
     });
 
     xwayland_handle = wlr_xwayland_create(wf::get_core().display,