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-rw-r--r--include/ui/gtk.h1
-rw-r--r--qapi/ui.json12
-rw-r--r--ui/gtk.c12
3 files changed, 19 insertions, 6 deletions
diff --git a/include/ui/gtk.h b/include/ui/gtk.h
index d3944046db..b7cfbf218e 100644
--- a/include/ui/gtk.h
+++ b/include/ui/gtk.h
@@ -140,6 +140,7 @@ struct GtkDisplayState {
     GdkCursor *null_cursor;
     Notifier mouse_mode_notifier;
     gboolean free_scale;
+    gboolean keep_aspect_ratio;
 
     bool external_pause_update;
 
diff --git a/qapi/ui.json b/qapi/ui.json
index 514fa159b1..9e496b4835 100644
--- a/qapi/ui.json
+++ b/qapi/ui.json
@@ -1335,13 +1335,17 @@
 # @show-menubar: Display the main window menubar.  Defaults to "on".
 #     (Since 8.0)
 #
+# @keep-aspect-ratio: Keep width/height aspect ratio of guest content when
+#     resizing host window.  Defaults to "on". (Since 10.1)
+#
 # Since: 2.12
 ##
 { 'struct'  : 'DisplayGTK',
-  'data'    : { '*grab-on-hover' : 'bool',
-                '*zoom-to-fit'   : 'bool',
-                '*show-tabs'     : 'bool',
-                '*show-menubar'  : 'bool'  } }
+  'data'    : { '*grab-on-hover'     : 'bool',
+                '*zoom-to-fit'       : 'bool',
+                '*show-tabs'         : 'bool',
+                '*show-menubar'      : 'bool',
+                '*keep-aspect-ratio' : 'bool'  } }
 
 ##
 # @DisplayEGLHeadless:
diff --git a/ui/gtk.c b/ui/gtk.c
index 8c4a94c8f6..9104509ee1 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -828,8 +828,12 @@ void gd_update_scale(VirtualConsole *vc, int ww, int wh, int fbw, int fbh)
 
         sx = (double)ww / fbw;
         sy = (double)wh / fbh;
-
-        vc->gfx.scale_x = vc->gfx.scale_y = MIN(sx, sy);
+        if (vc->s->keep_aspect_ratio) {
+            vc->gfx.scale_x = vc->gfx.scale_y = MIN(sx, sy);
+        } else {
+            vc->gfx.scale_x = sx;
+            vc->gfx.scale_y = sy;
+        }
     }
 }
 /**
@@ -2328,6 +2332,10 @@ static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
         s->free_scale = true;
     }
 
+    s->keep_aspect_ratio = true;
+    if (s->opts->u.gtk.has_keep_aspect_ratio)
+        s->keep_aspect_ratio = s->opts->u.gtk.keep_aspect_ratio;
+
     for (i = 0; i < INPUT_EVENT_SLOTS_MAX; i++) {
         struct touch_slot *slot = &touch_slots[i];
         slot->tracking_id = -1;