mutter/clutter/clutter-path.h

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2008 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/>.
*/
#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
#error "Only <clutter/clutter.h> can be included directly."
#endif
#ifndef __CLUTTER_PATH_H__
#define __CLUTTER_PATH_H__
#include <glib-object.h>
#include <clutter/clutter-types.h>
G_BEGIN_DECLS
#define CLUTTER_TYPE_PATH \
(clutter_path_get_type())
#define CLUTTER_PATH(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), \
CLUTTER_TYPE_PATH, \
ClutterPath))
#define CLUTTER_PATH_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), \
CLUTTER_TYPE_PATH, \
ClutterPathClass))
#define CLUTTER_IS_PATH(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
CLUTTER_TYPE_PATH))
#define CLUTTER_IS_PATH_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), \
CLUTTER_TYPE_PATH))
#define CLUTTER_PATH_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), \
CLUTTER_TYPE_PATH, \
ClutterPathClass))
#define CLUTTER_TYPE_PATH_NODE (clutter_path_node_get_type ())
#define CLUTTER_PATH_RELATIVE 32
/**
* ClutterPathNodeType:
* @CLUTTER_PATH_MOVE_TO: jump to the given position
* @CLUTTER_PATH_LINE_TO: create a line from the last node to the
* given position
* @CLUTTER_PATH_CURVE_TO: bezier curve using the last position and
* three control points.
* @CLUTTER_PATH_CLOSE: create a line from the last node to the last
* %CLUTTER_PATH_MOVE_TO node.
* @CLUTTER_PATH_REL_MOVE_TO: same as %CLUTTER_PATH_MOVE_TO but with
* coordinates relative to the last node.
* @CLUTTER_PATH_REL_LINE_TO: same as %CLUTTER_PATH_LINE_TO but with
* coordinates relative to the last node.
* @CLUTTER_PATH_REL_CURVE_TO: same as %CLUTTER_PATH_CURVE_TO but with
* coordinates relative to the last node.
*/
typedef enum {
CLUTTER_PATH_MOVE_TO = 0,
CLUTTER_PATH_LINE_TO = 1,
CLUTTER_PATH_CURVE_TO = 2,
CLUTTER_PATH_CLOSE = 3,
CLUTTER_PATH_REL_MOVE_TO = CLUTTER_PATH_MOVE_TO | CLUTTER_PATH_RELATIVE,
CLUTTER_PATH_REL_LINE_TO = CLUTTER_PATH_LINE_TO | CLUTTER_PATH_RELATIVE,
CLUTTER_PATH_REL_CURVE_TO = CLUTTER_PATH_CURVE_TO | CLUTTER_PATH_RELATIVE
} ClutterPathNodeType;
typedef struct _ClutterPath ClutterPath;
typedef struct _ClutterPathClass ClutterPathClass;
typedef struct _ClutterPathPrivate ClutterPathPrivate;
typedef struct _ClutterPathNode ClutterPathNode;
/**
* ClutterPathCallback:
* @node: the node
* @data: optional data passed to the function
*
* This function is passed to clutter_path_foreach() and will be
* called for each node contained in the path.
*
* Since: 1.0
*/
typedef void (* ClutterPathCallback) (const ClutterPathNode *node,
gpointer data);
/**
* ClutterPathClass:
*
* The #ClutterPathClass struct contains only private data.
*/
struct _ClutterPathClass
{
/*< private >*/
GInitiallyUnownedClass parent_class;
};
/**
* ClutterPath:
*
* The #ClutterPath struct contains only private data and should
* be accessed with the functions below.
*/
struct _ClutterPath
{
/*< private >*/
GInitiallyUnowned parent;
ClutterPathPrivate *priv;
};
/**
* ClutterPathNode:
* @type: the node's type
* @points: the coordinates of the node
*
* Represents a single node of a #ClutterPath.
*
* Some of the coordinates in @points may be unused for some node
* types. %CLUTTER_PATH_MOVE_TO and %CLUTTER_PATH_LINE_TO use only two
* pairs of coordinates, %CLUTTER_PATH_CURVE_TO uses all three and
* %CLUTTER_PATH_CLOSE uses none.
*
* Since: 1.0
*/
struct _ClutterPathNode
{
ClutterPathNodeType type;
ClutterKnot points[3];
};
GType clutter_path_get_type (void) G_GNUC_CONST;
ClutterPath *clutter_path_new (void);
ClutterPath *clutter_path_new_with_description (const gchar *desc);
void clutter_path_add_move_to (ClutterPath *path,
gint x,
gint y);
void clutter_path_add_rel_move_to (ClutterPath *path,
gint x,
gint y);
void clutter_path_add_line_to (ClutterPath *path,
gint x,
gint y);
void clutter_path_add_rel_line_to (ClutterPath *path,
gint x,
gint y);
void clutter_path_add_curve_to (ClutterPath *path,
gint x1,
gint y1,
gint x2,
gint y2,
gint x3,
gint y3);
void clutter_path_add_rel_curve_to (ClutterPath *path,
gint x1,
gint y1,
gint x2,
gint y2,
gint x3,
gint y3);
void clutter_path_add_close (ClutterPath *path);
gboolean clutter_path_add_string (ClutterPath *path,
const gchar *str);
void clutter_path_add_node (ClutterPath *path,
const ClutterPathNode *node);
guint clutter_path_get_n_nodes (ClutterPath *path);
void clutter_path_get_node (ClutterPath *path,
guint index,
ClutterPathNode *node);
GSList *clutter_path_get_nodes (ClutterPath *path);
void clutter_path_foreach (ClutterPath *path,
ClutterPathCallback callback,
gpointer user_data);
void clutter_path_insert_node (ClutterPath *path,
gint index,
const ClutterPathNode *node);
void clutter_path_remove_node (ClutterPath *path,
guint index);
void clutter_path_replace_node (ClutterPath *path,
guint index,
const ClutterPathNode *node);
gchar *clutter_path_get_description (ClutterPath *path);
gboolean clutter_path_set_description (ClutterPath *path,
const gchar *str);
void clutter_path_clear (ClutterPath *path);
guint clutter_path_get_position (ClutterPath *path,
guint alpha,
ClutterKnot *position);
guint clutter_path_get_length (ClutterPath *path);
ClutterPathNode *clutter_path_node_copy (const ClutterPathNode *node);
void clutter_path_node_free (ClutterPathNode *node);
gboolean clutter_path_node_equal (const ClutterPathNode *node_a,
const ClutterPathNode *node_b);
GType clutter_path_node_get_type (void);
G_END_DECLS
#endif /* __CLUTTER_PATH_H__ */