From ebafdc44003f5974a8ba1a6fa0a8295221999751 Mon Sep 17 00:00:00 2001
From: Hongfei Shang <shanghongfei@kylinos.cn>
Date: Sat, 3 Dec 2022 16:01:54 +0800
Subject: [PATCH] [x11] root window support _NET_WM_WINDOW_OPACITY

java gui will check this property on root window.

see:
https://github.com/openjdk/jdk/blob/6b55ef3b58ae405c46f440e06b5adb03cec3a500/src/java.desktop/unix/classes/sun/awt/X11/XNETProtocol.java#L328

Signed-off-by: Hongfei Shang <shanghongfei@kylinos.cn>
---
 src/netinfo.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/netinfo.cpp b/src/netinfo.cpp
index 13f58d524e..56b7f63573 100644
--- a/src/netinfo.cpp
+++ b/src/netinfo.cpp
@@ -100,7 +100,8 @@ RootInfo *RootInfo::create()
         | NET::WM2KDEShadow
         | NET::WM2OpaqueRegion
         | NET::WM2GTKFrameExtents
-        | NET::WM2GTKShowWindowMenu;
+        | NET::WM2GTKShowWindowMenu
+        | NET::WM2Opacity;
 #if KWIN_BUILD_ACTIVITIES
     properties2 |= NET::WM2Activities;
 #endif