[gnome-boxes/wip/dont-crash-gl: 1/2] spice-display: Don't crash when taking screenshots with GL

[Felipe Borges <felipeborges src gnome org>]

commit 2e220617c754f9163fda7ff0ecbe51b71ad5dca7
Author: Felipe Borges <felipeborges gnome org>
Date:   Fri May 24 15:36:33 2019 +0200

    spice-display: Don't crash when taking screenshots with GL
    
    Boxes crashes when taking screenshots (calling spice_display_get_pixbuf ()
    when GL (virgl) is enabled. This is a known Mesa issue, reported
    at https://bugs.freedesktop.org/106811
    
    This fix is a workaround (screenshots are not working for virgl
    3d accelerated VMs) and should be reverted once the issues are
    fixed in Mesa.
    
    This has been initially reported as #311

 src/spice-display.vala | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/spice-display.vala b/src/spice-display.vala
index f5d6e7bd..5223549a 100644
--- a/src/spice-display.vala
+++ b/src/spice-display.vala
@@ -193,6 +193,12 @@ public override void set_enable_audio (bool enable) {
         if (!display.ready)
             return null;
 
+        /* FIXME: This is a temporary workaround for a mesa issue that causes
+         * Boxes to crash when calling spice_display_get_pixbuf ();
+         * See https://bugs.freedesktop.org/106811 */
+        if ((machine as LibvirtMachine).acceleration_3d)
+            return null;
+
         return display.get_pixbuf ();
     }