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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* GThumb
*
* Copyright (C) 2001-2014 The Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GTH_CURVE_H
#define GTH_CURVE_H
#include <glib.h>
#include <gtk/gtk.h>
#include <gthumb.h>
#include "gth-points.h"
G_BEGIN_DECLS
/* -- GthCurve -- */
#define GTH_TYPE_CURVE (gth_curve_get_type ())
#define GTH_CURVE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTH_TYPE_CURVE, GthCurve))
#define GTH_CURVE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTH_TYPE_CURVE, GthCurveClass))
#define GTH_IS_CURVE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTH_TYPE_CURVE))
#define GTH_IS_CURVE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTH_TYPE_CURVE))
#define GTH_CURVE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTH_TYPE_CURVE, GthCurveClass))
typedef struct {
GObject parent_instance;
GthPoints points;
} GthCurve;
typedef struct {
GObjectClass parent_class;
/*< virtual functions >*/
void (*setup) (GthCurve *curve);
double (*eval) (GthCurve *curve, double x);
} GthCurveClass;
GType gth_curve_get_type (void);
GthCurve * gth_curve_new (GType curve_type,
GthPoints *points);
GthCurve * gth_curve_new_for_points (GType curve_type,
int n_points,
...);
void gth_curve_set_points (GthCurve *curve,
GthPoints *points);
GthPoints * gth_curve_get_points (GthCurve *curve);
void gth_curve_setup (GthCurve *self);
double gth_curve_eval (GthCurve *curve,
double x);
/* -- GthSpline -- */
#define GTH_TYPE_SPLINE (gth_spline_get_type ())
#define GTH_SPLINE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTH_TYPE_SPLINE, GthSpline))
#define GTH_SPLINE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTH_TYPE_SPLINE, GthSplineClass))
#define GTH_IS_SPLINE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTH_TYPE_SPLINE))
#define GTH_IS_SPLINE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTH_TYPE_SPLINE))
#define GTH_SPLINE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTH_TYPE_SPLINE, GthSplineClass))
typedef struct {
GthCurve parent_instance;
double *k;
gboolean is_singular;
} GthSpline;
typedef GthCurveClass GthSplineClass;
GType gth_spline_get_type (void);
/* -- GthCSpline -- */
#define GTH_TYPE_CSPLINE (gth_cspline_get_type ())
#define GTH_CSPLINE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTH_TYPE_CSPLINE, GthCSpline))
#define GTH_CSPLINE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTH_TYPE_CSPLINE, GthCSplineClass))
#define GTH_IS_CSPLINE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTH_TYPE_CSPLINE))
#define GTH_IS_CSPLINE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTH_TYPE_CSPLINE))
#define GTH_CSPLINE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTH_TYPE_CSPLINE, GthCSplineClass))
typedef struct {
GthCurve parent_instance;
double *tangents;
} GthCSpline;
typedef GthCurveClass GthCSplineClass;
GType gth_cspline_get_type (void);
/* -- GthBezier -- */
#define GTH_TYPE_BEZIER (gth_bezier_get_type ())
#define GTH_BEZIER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTH_TYPE_BEZIER, GthBezier))
#define GTH_BEZIER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTH_TYPE_BEZIER, GthBezierClass))
#define GTH_IS_BEZIER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTH_TYPE_BEZIER))
#define GTH_IS_BEZIER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTH_TYPE_BEZIER))
#define GTH_BEZIER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTH_TYPE_BEZIER, GthBezierClass))
typedef struct {
GthCurve parent_instance;
double *k;
gboolean linear;
} GthBezier;
typedef GthCurveClass GthBezierClass;
GType gth_bezier_get_type (void);
G_END_DECLS
#endif /* GTH_CURVE_H */
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