From 1f39cb2ef51c72ec0c448c5d9571540bb0d9f3eb Mon Sep 17 00:00:00 2001
From: Roman Gilg <subdiff@gmail.com>
Date: Fri, 3 Jan 2020 17:12:14 +0100
Subject: [PATCH xserver 15/24] xwayland: Reuse viewport instead of recreating

When a viewport is already created we can reuse this object instead of
destroying it and getting a new one for updating the source rectangle and
destination size.

Signed-off-by: Roman Gilg <subdiff@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Olivier Fourdan <ofourdan@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
(cherry picked from commit 948e02872feb641a176b3af82b6ef1201c97bb16)
---
 hw/xwayland/xwayland.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/hw/xwayland/xwayland.c b/hw/xwayland/xwayland.c
index f4d433bca..320589dde 100644
--- a/hw/xwayland/xwayland.c
+++ b/hw/xwayland/xwayland.c
@@ -550,17 +550,13 @@ xwl_window_enable_viewport(struct xwl_window *xwl_window,
                            struct xwl_output *xwl_output,
                            struct xwl_emulated_mode *emulated_mode)
 {
-    /* If necessary disable old viewport to apply new settings */
-    if (xwl_window_has_viewport_enabled(xwl_window))
-        xwl_window_disable_viewport(xwl_window);
-
-    DebugF("XWAYLAND: enabling viewport %dx%d -> %dx%d\n",
-           emulated_mode->width, emulated_mode->height,
-           xwl_output->width, xwl_output->height);
-
-    xwl_window->viewport =
-        wp_viewporter_get_viewport(xwl_window->xwl_screen->viewporter,
-                                   xwl_window->surface);
+    if (!xwl_window_has_viewport_enabled(xwl_window)) {
+        DebugF("XWAYLAND: enabling viewport %dx%d -> %dx%d\n",
+               emulated_mode->width, emulated_mode->height,
+               xwl_output->width, xwl_output->height);
+        xwl_window->viewport = wp_viewporter_get_viewport(xwl_window->xwl_screen->viewporter,
+                                                          xwl_window->surface);
+    }
 
     wp_viewport_set_source(xwl_window->viewport,
                            wl_fixed_from_int(0),
-- 
2.25.2