[gtk+/wip/matthiasc/gsk-renderer] Fix fallback render nodes

[Matthias Clasen <matthiasc src gnome org>]

commit 3c9c13ba8769487bb2e764587f3c75974702eff3
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Aug 4 01:05:14 2016 -0400

    Fix fallback render nodes
    
    We were allocating a surface thats big enough for the clip, and
    we were setting the transform for that, but then GtkContainer
    was overriding the transform with the one for the allocation.
    Also, we were drawing at the clip position, not the allocation
    position.

 gtk/gtkwidget.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index fa850f9..1617579 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -17487,10 +17487,12 @@ gtk_widget_get_render_node (GtkWidget   *widget,
   graphene_point3d_t tmp;
   graphene_rect_t bounds;
   GtkAllocation clip;
+  GtkAllocation alloc;
 
   gtk_widget_get_clip (widget, &clip);
+  gtk_widget_get_allocation (widget, &alloc);
   graphene_rect_init (&bounds, 0, 0, clip.width, clip.height);
-  graphene_matrix_init_translate (&m, graphene_point3d_init (&tmp, clip.x, clip.y, 0.f));
+  graphene_matrix_init_translate (&m, graphene_point3d_init (&tmp, alloc.x, alloc.y, 0.f));
 
   /* Compatibility mode: if the widget does not have a render node, we draw
    * using gtk_widget_draw() on a temporary node
@@ -17500,6 +17502,7 @@ gtk_widget_get_render_node (GtkWidget   *widget,
       GskRenderNode *tmp;
       cairo_t *cr;
       char *str;
+      graphene_point3d_t p;
 
       str = g_strconcat ("Fallback<", G_OBJECT_TYPE_NAME (widget), ">", NULL);
 
@@ -17508,6 +17511,8 @@ gtk_widget_get_render_node (GtkWidget   *widget,
       gsk_render_node_set_bounds (tmp, &bounds);
       gsk_render_node_set_transform (tmp, &m);
       cr = gsk_render_node_get_draw_context (tmp);
+      cairo_translate (cr, alloc.x - clip.x, alloc.y - clip.y);
+      gsk_render_node_set_offset (tmp, graphene_point3d_init (&p, clip.x - alloc.x, clip.y - alloc.y, 0.f));
 
       gtk_widget_draw (widget, cr);