[gtk/wip/baedert/transforms6: 240/273] widget: Add transform matrix

[Timm Bäder <baedert src gnome org>]

commit 6ad72b7e26d2e946fc43e5241c5500f8d87a5f0b
Author: Timm Bäder <mail baedert org>
Date:   Sat Jul 21 13:51:05 2018 +0200

    widget: Add transform matrix
    
    Unused for now.

 gtk/gtkwidget.c        | 2 ++
 gtk/gtkwidgetprivate.h | 2 ++
 2 files changed, 4 insertions(+)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 9207a46b1d..8d785a56f2 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -2850,6 +2850,8 @@ gtk_widget_init (GTypeInstance *instance, gpointer g_class)
       break;
     }
 
+  graphene_matrix_init_identity (&priv->transform);
+
   /* this will be set to TRUE if the widget gets a child or if the
    * expand flag is set on the widget, but until one of those happen
    * we know the expand is already properly FALSE.
diff --git a/gtk/gtkwidgetprivate.h b/gtk/gtkwidgetprivate.h
index 26c33ba0bc..ba23cbb599 100644
--- a/gtk/gtkwidgetprivate.h
+++ b/gtk/gtkwidgetprivate.h
@@ -144,6 +144,8 @@ struct _GtkWidgetPrivate
   GtkAllocation allocation;
   gint allocated_baseline;
 
+  graphene_matrix_t transform;
+
   /* The widget's requested sizes */
   SizeRequestCache requests;