[gtk/wip/baedert/for-master] widget: don't queue a redraw on css transform changes

[Timm Bäder <baedert src gnome org>]

commit 13b992ddd82cd1706f6c8b807322684b42ff0aad
Author: Timm Bäder <mail baedert org>
Date:   Sat Jun 6 15:22:08 2020 +0200

    widget: don't queue a redraw on css transform changes

 gtk/gtkwidget.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index be2b26f9d8..83b23f2b3d 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -4743,7 +4743,9 @@ gtk_widget_real_css_changed (GtkWidget         *widget,
             }
           else if (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TRANSFORM))
             {
-                gtk_widget_queue_allocate (widget);
+              /* queue_allocate() without the redraw */
+              gtk_widget_set_alloc_needed (widget);
+              gtk_widget_queue_draw (priv->parent);
             }
           else if (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_REDRAW) ||
                    (has_text && gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TEXT_CONTENT)))