2008-02-14 Tomas Frydrych <tf@openedhand.com>

* clutter/clutter-actor.c:
	* clutter/clutter-actor.h:
	(clutter_actor_is_scaled):
	(clutter_actor_is_rotated):
	Convenience functions to test whether actor is scaled or rotated.

	(clutter_actor_apply_relative_transform_to_point):
	Removed unused variable.

	* clutter/clutter-group.c:
	(clutter_group_query_coords):
	Use clutter_actor_get_relative_vertices() to calculate bounding
	boxes of children that are scaled or rotated.

ChangeLog

@@ -1,3 +1,19 @@
+2008-02-14  Tomas Frydrych  <tf@openedhand.com>
+
+	* clutter/clutter-actor.c:
+	* clutter/clutter-actor.h:
+	(clutter_actor_is_scaled):
+	(clutter_actor_is_rotated):
+	Convenience functions to test whether actor is scaled or rotated.
+
+	(clutter_actor_apply_relative_transform_to_point):
+	Removed unused variable.
+
+	* clutter/clutter-group.c:
+	(clutter_group_query_coords):
+	Use clutter_actor_get_relative_vertices() to calculate bounding
+	boxes of children that are scaled or rotated.
+
 2008-02-14  Tomas Frydrych  <tf@openedhand.com>
 
 	* clutter/clutter-actor.c:

clutter/clutter-actor.c

@@ -660,7 +660,6 @@ clutter_actor_apply_relative_transform_to_point (ClutterActor  *self,
 						 ClutterVertex *point,
 						 ClutterVertex *vertex)
 {
-  ClutterFixed  mtx_p[16];
   ClutterFixed  v[4];
   ClutterFixed  w = CFX_ONE;
 
@@ -5516,3 +5515,50 @@ clutter_actor_set_shader_param (ClutterActor *self,
   box->value = value;
   g_hash_table_insert (shader_data->float1f_hash, g_strdup (param), box);
 }
+
+/**
+ * clutter_actor_is_rotated:
+ * @self: a #ClutterActor
+ *
+ * Returns true if any rotation is applied to the actor.
+ *
+ * Since: 0.6
+ */
+gboolean
+clutter_actor_is_rotated (ClutterActor *self)
+{
+  ClutterActorPrivate *priv;
+
+  g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
+
+  priv = self->priv;
+
+  if (priv->rxang || priv->ryang || priv->rzang)
+    return TRUE;
+
+  return FALSE;
+}
+
+/**
+ * clutter_actor_is_scaled:
+ * @self: a #ClutterActor
+ *
+ * Returns true if the actor is scaled in either dimension.
+ *
+ * Since: 0.6
+ */
+gboolean
+clutter_actor_is_scaled (ClutterActor *self)
+{
+  ClutterActorPrivate *priv;
+
+  g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
+
+  priv = self->priv;
+
+  if (priv->scale_x != CFX_ONE || priv->scale_y != CFX_ONE)
+    return TRUE;
+
+  return FALSE;
+}
+

clutter/clutter-actor.h

@@ -458,6 +458,8 @@ gboolean clutter_actor_transform_stage_point          (ClutterActor   *self,
                                                        ClutterUnit     y,
                                                        ClutterUnit    *x_out,
                                                        ClutterUnit    *y_out);
+gboolean clutter_actor_is_rotated                     (ClutterActor   *self);
+gboolean clutter_actor_is_scaled                      (ClutterActor   *self);
 
 G_END_DECLS
 

clutter/clutter-group.c

@@ -148,6 +148,49 @@ clutter_group_request_coords (ClutterActor    *self,
   CLUTTER_ACTOR_CLASS (clutter_group_parent_class)->request_coords (self, box);
 }
 
+static void
+clutter_group_get_box_from_vertices (ClutterActorBox *box,
+				     ClutterVertex    vtx[4])
+{
+  ClutterUnit x1, x2, y1, y2;
+
+  /* 4-way min/max */
+  x1 = vtx[0].x;
+  y1 = vtx[0].y;
+  if (vtx[1].x < x1)
+    x1 = vtx[1].x;
+  if (vtx[2].x < x1)
+    x1 = vtx[2].x;
+  if (vtx[3].x < x1)
+    x1 = vtx[3].x;
+  if (vtx[1].y < y1)
+    y1 = vtx[1].y;
+  if (vtx[2].y < y1)
+    y1 = vtx[2].y;
+  if (vtx[3].y < y1)
+    y1 = vtx[3].y;
+
+  x2 = vtx[0].x;
+  y2 = vtx[0].y;
+  if (vtx[1].x > x2)
+    x2 = vtx[1].x;
+  if (vtx[2].x > x2)
+    x2 = vtx[2].x;
+  if (vtx[3].x > x2)
+    x2 = vtx[3].x;
+  if (vtx[1].y > y2)
+    y2 = vtx[1].y;
+  if (vtx[2].y > y2)
+    y2 = vtx[2].y;
+  if (vtx[3].y > y2)
+    y2 = vtx[3].y;
+
+  box->x1 = x1;
+  box->x2 = x2;
+  box->y1 = y1;
+  box->y2 = y2;
+}
+
 static void
 clutter_group_query_coords (ClutterActor        *self,
 			    ClutterActorBox     *box)
@@ -168,11 +211,18 @@ clutter_group_query_coords (ClutterActor        *self,
       do
 	{
 	  ClutterActor    *child = CLUTTER_ACTOR(child_item->data);
-
-	  /* Once added we include in sizing - doesn't matter if visible */
-	  /* if (CLUTTER_ACTOR_IS_VISIBLE (child)) */
-	    {
 	  ClutterActorBox  cbox;
+
+	  if (clutter_actor_is_scaled (child) ||
+	      clutter_actor_is_rotated (child))
+	    {
+	      ClutterVertex vtx[4];
+
+	      clutter_actor_get_relative_vertices (child, self, vtx);
+	      clutter_group_get_box_from_vertices (&cbox, vtx);
+	    }
+	  else
+	    {
 	      gint            anchor_x;
 	      gint            anchor_y;
 
@@ -188,13 +238,16 @@ clutter_group_query_coords (ClutterActor        *self,
 	      cbox.x2 -= anchor_x;
 	      cbox.y1 -= anchor_y;
 	      cbox.y2 -= anchor_y;
+	    }
 
-	      /* Ignore any children with offscreen ( negaive )
+	  /* FIXME: now that we go into the trouble of working out the
+	   * projected sizes, we should do better than this (probably resize
+	   * the box in all direction as required).
+	   *
+	   * Ignore any children with offscreen ( negaive )
 	   * positions.
 	   *
 	   * Also x1 and x2 will be set by parent caller.
-               *
-               * FIXME: this assumes that children are not rotated in anyway.
 	   */
 	  if (box->x2 - box->x1 < cbox.x2)
 	    box->x2 = cbox.x2 + box->x1;
@@ -202,7 +255,6 @@ clutter_group_query_coords (ClutterActor        *self,
 	  if (box->y2 - box->y1 < cbox.y2)
 	    box->y2 = cbox.y2 + box->y1;
 	}
-	}
       while ((child_item = g_list_next(child_item)) != NULL);
     }
 }