From 5dc9d0f5810864c4048abd2cf2b8ae00e0c26470 Mon Sep 17 00:00:00 2001
From: Camilla Berglund <elmindreda@elmindreda.org>
Date: Sun, 28 Feb 2016 18:41:10 +0100
Subject: [PATCH] Avoid X11 frame size query of undecorated windows

This also works around an issue where Xfwm4 ignores Motif hints when
calculating frame extents.
---
 src/x11_window.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/x11_window.c b/src/x11_window.c
index 1ee5f1ff..65cc8a55 100644
--- a/src/x11_window.c
+++ b/src/x11_window.c
@@ -1678,6 +1678,9 @@ void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window,
 {
     long* extents = NULL;
 
+    if (window->monitor || !window->decorated)
+        return;
+
     if (_glfw.x11.NET_FRAME_EXTENTS == None)
         return;