[gtk+/wip/baedert/drawing: 209/306] icon: Render at content position

[Timm Bäder <baedert src gnome org>]

commit 8dac9797ba7fec9cb14d9066a0f97287458401a8
Author: Timm Bäder <mail baedert org>
Date:   Sat May 20 14:08:42 2017 +0200

    icon: Render at content position
    
    Since we get offset automatically to the widget allocation before
    ->snapshot is called, we still have to offset the difference to the
    position of the content allocation.

 gtk/gtkicon.c |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkicon.c b/gtk/gtkicon.c
index 3591a30..9d1645e 100644
--- a/gtk/gtkicon.c
+++ b/gtk/gtkicon.c
@@ -24,6 +24,7 @@
 #include "gtkiconprivate.h"
 #include "gtkwidgetprivate.h"
 #include "gtkrendericonprivate.h"
+#include "gtksnapshot.h"
 
 /* GtkIcon was a minimal widget wrapped around a GtkBuiltinIcon gadget,
  * It should be used whenever builtin-icon functionality is desired
@@ -45,14 +46,22 @@ gtk_icon_snapshot (GtkWidget   *widget,
 {
   GtkIcon *self = GTK_ICON (widget);
   GtkCssStyle *style = gtk_css_node_get_style (gtk_widget_get_css_node (widget));
+  GtkAllocation content_alloc;
   GtkAllocation alloc;
+  int x, y;
 
-  gtk_widget_get_content_allocation (widget, &alloc);
+  gtk_widget_get_allocation (widget, &alloc);
+  gtk_widget_get_content_allocation (widget, &content_alloc);
 
+  x = content_alloc.x - alloc.x;
+  y = content_alloc.y - alloc.y;
+
+  gtk_snapshot_offset (snapshot, x, y);
   gtk_css_style_snapshot_icon (style,
                                snapshot,
-                               alloc.width, alloc.height,
+                               content_alloc.width, content_alloc.height,
                                self->image);
+  gtk_snapshot_offset (snapshot, -x, -y);
 }
 
 static void