mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-09-20 05:50:11 +00:00
193 lines
9.4 KiB
C
193 lines
9.4 KiB
C
/*
|
|
* Copyright © 2020 Benjamin Otte
|
|
*
|
|
* 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 2.1 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: Benjamin Otte <otte@gnome.org>
|
|
*/
|
|
|
|
|
|
#pragma once
|
|
|
|
#include "gskpathopprivate.h"
|
|
#include "gskpath.h"
|
|
#include "gskboundingboxprivate.h"
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef gpointer gskpathop;
|
|
|
|
typedef union _GskCurve GskCurve;
|
|
|
|
typedef struct _GskLineCurve GskLineCurve;
|
|
typedef struct _GskQuadCurve GskQuadCurve;
|
|
typedef struct _GskCubicCurve GskCubicCurve;
|
|
typedef struct _GskConicCurve GskConicCurve;
|
|
|
|
struct _GskLineCurve
|
|
{
|
|
GskPathOperation op;
|
|
|
|
gboolean padding;
|
|
|
|
graphene_point_t points[2];
|
|
};
|
|
|
|
struct _GskQuadCurve
|
|
{
|
|
GskPathOperation op;
|
|
|
|
gboolean has_coefficients;
|
|
|
|
graphene_point_t points[3];
|
|
|
|
graphene_point_t coeffs[3];
|
|
};
|
|
|
|
struct _GskCubicCurve
|
|
{
|
|
GskPathOperation op;
|
|
|
|
gboolean has_coefficients;
|
|
|
|
graphene_point_t points[4];
|
|
|
|
graphene_point_t coeffs[4];
|
|
};
|
|
|
|
struct _GskConicCurve
|
|
{
|
|
GskPathOperation op;
|
|
|
|
gboolean has_coefficients;
|
|
|
|
/* points[0], points[1], points[3] are the control points,
|
|
* points[2].x is the weight
|
|
*/
|
|
graphene_point_t points[4];
|
|
|
|
graphene_point_t num[3];
|
|
graphene_point_t denom[3];
|
|
};
|
|
|
|
union _GskCurve
|
|
{
|
|
GskPathOperation op;
|
|
GskLineCurve line;
|
|
GskQuadCurve quad;
|
|
GskCubicCurve cubic;
|
|
GskConicCurve conic;
|
|
};
|
|
|
|
typedef enum {
|
|
GSK_CURVE_LINE_REASON_STRAIGHT,
|
|
GSK_CURVE_LINE_REASON_SHORT
|
|
} GskCurveLineReason;
|
|
|
|
typedef gboolean (* GskCurveAddLineFunc) (const graphene_point_t *from,
|
|
const graphene_point_t *to,
|
|
float from_progress,
|
|
float to_progress,
|
|
GskCurveLineReason reason,
|
|
gpointer user_data);
|
|
|
|
typedef gboolean (* GskCurveAddCurveFunc) (GskPathOperation op,
|
|
const graphene_point_t *pts,
|
|
gsize n_pts,
|
|
float weight,
|
|
gpointer user_data);
|
|
|
|
void gsk_curve_init (GskCurve *curve,
|
|
gskpathop op);
|
|
void gsk_curve_init_foreach (GskCurve *curve,
|
|
GskPathOperation op,
|
|
const graphene_point_t *pts,
|
|
gsize n_pts,
|
|
float weight);
|
|
|
|
void gsk_curve_print (const GskCurve *curve,
|
|
GString *string);
|
|
|
|
char * gsk_curve_to_string (const GskCurve *curve);
|
|
|
|
gskpathop gsk_curve_pathop (const GskCurve *curve);
|
|
const graphene_point_t *gsk_curve_get_start_point (const GskCurve *curve);
|
|
const graphene_point_t *gsk_curve_get_end_point (const GskCurve *curve);
|
|
void gsk_curve_get_start_tangent (const GskCurve *curve,
|
|
graphene_vec2_t *tangent);
|
|
void gsk_curve_get_end_tangent (const GskCurve *curve,
|
|
graphene_vec2_t *tangent);
|
|
void gsk_curve_get_point (const GskCurve *curve,
|
|
float progress,
|
|
graphene_point_t *pos);
|
|
void gsk_curve_get_tangent (const GskCurve *curve,
|
|
float progress,
|
|
graphene_vec2_t *tangent);
|
|
void gsk_curve_reverse (const GskCurve *curve,
|
|
GskCurve *reverse);
|
|
void gsk_curve_split (const GskCurve *curve,
|
|
float progress,
|
|
GskCurve *start,
|
|
GskCurve *end);
|
|
void gsk_curve_segment (const GskCurve *curve,
|
|
float start,
|
|
float end,
|
|
GskCurve *segment);
|
|
gboolean gsk_curve_decompose (const GskCurve *curve,
|
|
float tolerance,
|
|
GskCurveAddLineFunc add_line_func,
|
|
gpointer user_data);
|
|
gboolean gsk_curve_decompose_curve (const GskCurve *curve,
|
|
GskPathForeachFlags flags,
|
|
float tolerance,
|
|
GskCurveAddCurveFunc add_curve_func,
|
|
gpointer user_data);
|
|
|
|
#define gsk_curve_builder_to(curve, builder) gsk_path_builder_pathop_to ((builder), gsk_curve_pathop (curve))
|
|
|
|
float gsk_curve_get_curvature (const GskCurve *curve,
|
|
float t,
|
|
graphene_point_t *center);
|
|
void gsk_curve_get_bounds (const GskCurve *curve,
|
|
GskBoundingBox *bounds);
|
|
void gsk_curve_get_tight_bounds (const GskCurve *curve,
|
|
GskBoundingBox *bounds);
|
|
|
|
void gsk_curve_get_derivative_at (const GskCurve *curve,
|
|
float t,
|
|
graphene_point_t *value);
|
|
int gsk_curve_get_crossing (const GskCurve *curve,
|
|
const graphene_point_t *point);
|
|
gboolean gsk_curve_get_closest_point (const GskCurve *curve,
|
|
const graphene_point_t *point,
|
|
float threshold,
|
|
float *out_dist,
|
|
float *out_t);
|
|
float gsk_curve_get_length (const GskCurve *curve);
|
|
float gsk_curve_get_length_to (const GskCurve *curve,
|
|
float t);
|
|
float gsk_curve_at_length (const GskCurve *curve,
|
|
float distance,
|
|
float epsilon);
|
|
|
|
int gsk_curve_get_curvature_points (const GskCurve *curve,
|
|
float t[3]);
|
|
|
|
int gsk_curve_get_cusps (const GskCurve *curve,
|
|
float t[2]);
|
|
|
|
|
|
G_END_DECLS
|
|
|