mirror of
https://github.com/brl/mutter.git
synced 2024-09-20 14:35:48 -04:00
d02d40bf61
This adds a convenience COGL_OBJECT macro for casting CoglObject subclasses to (CoglObject *) pointers.
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 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/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifndef __COGL_OBJECT_H
|
|
#define __COGL_OBJECT_H
|
|
|
|
typedef struct _CoglObject CoglObject;
|
|
|
|
#define COGL_OBJECT(X) ((CoglObject *)X)
|
|
|
|
/**
|
|
* CoglUserDataKey:
|
|
* @unused: ignored.
|
|
*
|
|
* A #CoglUserDataKey is used to declare a key for attaching data to a
|
|
* #CoglObject using cogl_object_set_user_data. The typedef only exists as a
|
|
* formality to make code self documenting since only the unique address of a
|
|
* #CoglUserDataKey is used.
|
|
*
|
|
* Typically you would declare a static #CoglUserDataKey and set private data
|
|
* on an object something like this:
|
|
*
|
|
* |[
|
|
* static CoglUserDataKey path_private_key;
|
|
*
|
|
* static void
|
|
* destroy_path_private_cb (void *data)
|
|
* {
|
|
* g_free (data);
|
|
* }
|
|
*
|
|
* static void
|
|
* my_path_set_data (CoglPath *path, void *data)
|
|
* {
|
|
* cogl_object_set_user_data (COGL_OBJECT (path),
|
|
* &private_key,
|
|
* data,
|
|
* destroy_path_private_cb);
|
|
* }
|
|
* ]|
|
|
*
|
|
* Since: 1.4
|
|
*/
|
|
typedef struct
|
|
{
|
|
int unused;
|
|
} CoglUserDataKey;
|
|
|
|
/**
|
|
* CoglUserDataDestroyCallback:
|
|
* @user_data: The data whos association with a #CoglObject has been
|
|
* destoyed.
|
|
*
|
|
* When associating private data with a #CoglObject a callback can be
|
|
* given which will be called either if the object is destroyed or if
|
|
* cogl_object_set_user_data() is called with NULL user_data for the
|
|
* same key.
|
|
*
|
|
* Since: 1.4
|
|
*/
|
|
typedef void (*CoglUserDataDestroyCallback) (void *user_data);
|
|
|
|
/**
|
|
* cogl_object_set_user_data:
|
|
* @object: The object to associate private data with
|
|
* @key: The address of a #CoglUserDataKey which provides a unique value
|
|
* with which to index the private data.
|
|
* @user_data: The data to associate with the given object, or NULL to
|
|
* remove a previous association.
|
|
* @destroy: A #CoglUserDataDestroyCallback to call if the object is
|
|
* destroyed or if the association is removed by later setting
|
|
* NULL data for the same key.
|
|
*
|
|
* Associates some private @user_data with a given #CoglObject. To
|
|
* later remove the association call cogl_object_set_user_data() with
|
|
* the same @key but NULL for the @user_data.
|
|
*
|
|
* Since: 1.4
|
|
*/
|
|
void
|
|
cogl_object_set_user_data (CoglObject *object,
|
|
CoglUserDataKey *key,
|
|
void *user_data,
|
|
CoglUserDataDestroyCallback destroy);
|
|
|
|
/**
|
|
* cogl_object_get_user_data:
|
|
* @object: The object with associated private data to query
|
|
* @key: The address of a #CoglUserDataKey which provides a unique value
|
|
* with which to index the private data.
|
|
*
|
|
* Finds the user data previously associated with @object using
|
|
* the given @key. If no user data has been associated with @object
|
|
* for the given @key this function returns NULL.
|
|
*
|
|
* Returns: The user data previously associated with @object using
|
|
* the given @key; or NULL if no associated data is found.
|
|
*
|
|
* Since: 1.4
|
|
*/
|
|
void *
|
|
cogl_object_get_user_data (CoglObject *object,
|
|
CoglUserDataKey *key);
|
|
#endif /* __COGL_OBJECT_H */
|
|
|