Imported Upstream version 4.3.10-dfsgupstream/4.3.10-dfsgupstream

1 files changed, 22 insertions, 0 deletions

diff --git a/src/VBox/HostServices/SharedOpenGL/crserverlib/server_stream.c b/src/VBox/HostServices/SharedOpenGL/crserverlib/server_stream.c
index bfadeda92..29670790a 100644
--- a/src/VBox/HostServices/SharedOpenGL/crserverlib/server_stream.c
+++ b/src/VBox/HostServices/SharedOpenGL/crserverlib/server_stream.c
@@ -281,6 +281,28 @@ crServerDeleteClient( CRClient *client )
         pNode->next = cr_server.pCleanupClient;
         cr_server.pCleanupClient = pNode;
     }
+
+    if (!cr_server.numClients)
+    {
+        /* if no clients, the guest driver may be unloaded,
+         * and thus the visible regions situation might not be under control anymore,
+         * so cleanup the 3D framebuffer data here
+         * @todo: what really should happen is that guest driver on unload
+         * posts some request to host that would copy the current framebuffer 3D data to the 2D buffer
+         * (i.e. to the memory used by the standard IFramebuffer API) */
+        HCR_FRAMEBUFFER hFb;
+        for (hFb = CrPMgrFbGetFirstEnabled(); hFb; hFb = CrPMgrFbGetNextEnabled(hFb))
+        {
+            int rc = CrFbUpdateBegin(hFb);
+            if (RT_SUCCESS(rc))
+            {
+                CrFbRegionsClear(hFb);
+                CrFbUpdateEnd(hFb);
+            }
+            else
+                WARN(("CrFbUpdateBegin failed %d", rc));
+        }
+    }
 }
 
 /**