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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2008,2009,2010 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifndef __COGL_NODE_PRIVATE_H
#define __COGL_NODE_PRIVATE_H
#include "cogl-object-private.h"
#include "cogl-list.h"
typedef struct _CoglNode CoglNode;
/* Pipelines and layers represent their state in a tree structure where
* some of the state relating to a given pipeline or layer may actually
* be owned by one if is ancestors in the tree. We have a common data
* type to track the tree heirachy so we can share code... */
struct _CoglNode
{
/* the parent in terms of class hierarchy, so anything inheriting
* from CoglNode also inherits from CoglObject. */
CoglObject _parent;
/* The parent pipeline/layer */
CoglNode *parent;
/* The list entry here contains pointers to the node's siblings */
CoglList link;
/* List of children */
CoglList children;
/* TRUE if the node took a strong reference on its parent. Weak
* pipelines for instance don't take a reference on their parent. */
CoglBool has_parent_reference;
};
#define COGL_NODE(X) ((CoglNode *)(X))
void
_cogl_pipeline_node_init (CoglNode *node);
typedef void (*CoglNodeUnparentVFunc) (CoglNode *node);
void
_cogl_pipeline_node_set_parent_real (CoglNode *node,
CoglNode *parent,
CoglNodeUnparentVFunc unparent,
CoglBool take_strong_reference);
void
_cogl_pipeline_node_unparent_real (CoglNode *node);
typedef CoglBool (*CoglNodeChildCallback) (CoglNode *child, void *user_data);
void
_cogl_pipeline_node_foreach_child (CoglNode *node,
CoglNodeChildCallback callback,
void *user_data);
#endif /* __COGL_NODE_PRIVATE_H */
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