gimp/app/path_bezier.h

118 lines
2.6 KiB
C

/* The GIMP -- an image manipulation program
*
* This file Copyright (C) 1999 Simon Budig
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* This function is to get a set of npoints different coordinates for
* the range from start to end (each in the range from 0 to 1 and
* start < end.
* returns the number of created coords. Make sure that the points-
* Array is allocated.
*/
#ifndef __PATH_BEZIER_H__
#define __PATH_BEZIER_H__
#include "path_toolP.h"
typedef struct
{
gdouble x1;
gdouble y1;
gdouble x2;
gdouble y2;
} PathBezierData;
guint
path_bezier_get_points (PathTool *path_tool,
PathSegment *segment,
GdkPoint *points,
guint npoints,
gdouble start,
gdouble end);
void
path_bezier_get_point (PathTool *path_tool,
PathSegment *segment,
gdouble position,
gdouble *x,
gdouble *y);
void
path_bezier_draw_handles (Tool *tool,
PathSegment *segment);
void
path_bezier_draw_segment (Tool *tool,
PathSegment *segment);
gdouble
path_bezier_on_segment (Tool *tool,
PathSegment *segment,
gint x,
gint y,
gint halfwidth,
gint *distance);
void
path_bezier_drag_segment (PathTool *path_tool,
PathSegment *segment,
gdouble position,
gdouble dx,
gdouble dy);
gint
path_bezier_on_handles (PathTool *path_tool,
PathSegment *segment,
gdouble x,
gdouble y,
gdouble halfwidth);
void
path_bezier_drag_handles (PathTool *path_tool,
PathSegment *segment,
gdouble dx,
gdouble dy,
gint handle_id);
PathSegment *
path_bezier_insert_anchor (PathTool *path_tool,
PathSegment *segment,
gdouble position);
void
path_bezier_update_segment (PathTool *path_tool,
PathSegment *segment);
void
path_bezier_flip_segment (PathSegment *segment);
void
path_bezier_init_segment (PathSegment *segment);
void
path_bezier_cleanup_segment (PathSegment *segment);
#endif /* __PATH_BEZIER_H__ */