From 364aa1ba5d9cd5ca972373d3f5080f253f64e19e Mon Sep 17 00:00:00 2001
From: BearOso <bearoso@gmail.com>
Date: Wed, 4 Nov 2020 13:11:28 -0600
Subject: [PATCH] Gtk: OpenGL: Use correct screen for fbconfig.

---
 gtk/src/gtk_glx_context.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gtk/src/gtk_glx_context.cpp b/gtk/src/gtk_glx_context.cpp
index 3dff5efb..8eb2104c 100644
--- a/gtk/src/gtk_glx_context.cpp
+++ b/gtk/src/gtk_glx_context.cpp
@@ -45,16 +45,22 @@ bool GTKGLXContext::attach(Display *dpy, Window xid)
     this->xid = xid;
     display = dpy;
 
+    XWindowAttributes wa{};
+    XGetWindowAttributes(display, xid, &wa);
+    screen = XScreenNumberOfScreen(wa.screen);
+
     glXQueryVersion(display, &version_major, &version_minor);
     if (version_major < 2 && version_minor < 3)
         return false;
 
     fbconfigs = glXChooseFBConfig(display, screen, attribs, &num_fbconfigs);
+
     if (!fbconfigs || num_fbconfigs < 1)
     {
         printf("Couldn't match a GLX framebuffer config.\n");
         return false;
     }
+
     fbconfig = fbconfigs[0];
 
     return true;