From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 14 Dec 2015 11:14:34 +0000 (+0200)
Subject: Check that the root pixmap exists before using it
X-Git-Url: http://git.tdb.fi/?p=geometrycompositor.git;a=commitdiff_plain;h=6f6754fda1a75575ac37ee685f24d585369d9fde

Check that the root pixmap exists before using it
---

diff --git a/source/main.c b/source/main.c
index 2a22fdf..23c061b 100644
--- a/source/main.c
+++ b/source/main.c
@@ -815,6 +815,12 @@ void update_root_pixmap(Compositor *compositor, CompositedScreen *screen)
 	unsigned long overflow;
 	unsigned long length;
 	long *pixmap;
+	Window root;
+	int x, y;
+	unsigned width;
+	unsigned height;
+	unsigned border;
+	unsigned depth;
 
 	use_gl(compositor, screen);
 
@@ -833,7 +839,10 @@ void update_root_pixmap(Compositor *compositor, CompositedScreen *screen)
 	}
 
 	screen->root_pixmap = pixmap[0];
-	screen->root_glx_pixmap = pixmap_to_glx_pixmap(compositor, screen, screen->root_pixmap);
+	if(XGetGeometry(compositor->display, screen->root_pixmap, &root, &x, &y, &width, &height, &border, &depth))
+		screen->root_glx_pixmap = pixmap_to_glx_pixmap(compositor, screen, screen->root_pixmap);
+	else
+		screen->root_pixmap = None;
 
 	XFree(pixmap);
 }