gimp/app/tools/path_tool.h

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/* The GIMP -- an image manipulation program
*
* This file Copyright (C) 1999 Simon Budig
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*
* 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.
*/
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#ifndef __PATH_TOOL_H__
#define __PATH_TOOL_H__
/*
* Every new curve-type has to have a parameter between 0 and 1, and
* should go from a starting to a target point.
*/
/* Some defines... */
#define PATH_TOOL_WIDTH 8
#define PATH_TOOL_HALFWIDTH 4
/* function prototypes */
/* Small functions to determine coordinates, iterate over path/curve/segment */
void path_segment_get_coordinates (PathSegment *,
gdouble,
gint *,
gint *);
void path_traverse_path (NPath *,
PathTraverseFunc,
CurveTraverseFunc,
SegmentTraverseFunc,
gpointer);
void path_traverse_curve (NPath *,
PathCurve *,
CurveTraverseFunc,
SegmentTraverseFunc,
gpointer);
void path_traverse_segment (NPath *,
PathCurve *,
PathSegment *,
SegmentTraverseFunc,
gpointer);
gdouble path_locate_point (NPath *,
PathCurve **,
PathSegment **,
gint,
gint,
gint,
gint,
gint);
/* Tools to manipulate paths, curves, segments */
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PathCurve * path_add_curve (NPath *,
gdouble,
gdouble);
PathSegment * path_append_segment (NPath *,
PathCurve *,
SegmentType,
gdouble,
gdouble);
PathSegment * path_prepend_segment (NPath *,
PathCurve *,
SegmentType,
gdouble,
gdouble);
PathSegment * path_split_segment (PathSegment *,
gdouble);
void path_join_curves (PathSegment *,
PathSegment *);
void path_flip_curve (PathCurve *);
void path_free_path (NPath *);
void path_free_curve (PathCurve *);
void path_free_segment (PathSegment *);
void path_delete_segment (PathSegment *);
void path_print (NPath *);
void path_offset_active (NPath *,
gdouble,
gdouble);
void path_set_flags (GimpPathTool *path_tool,
NPath *,
PathCurve *,
PathSegment *,
guint32,
guint32);
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gdouble gimp_path_tool_on_curve (GimpPathTool *path_tool,
gint,
gint,
gint,
NPath**,
PathCurve**,
PathSegment**);
gboolean gimp_path_tool_on_anchors (GimpPathTool *path_tool,
gint,
gint,
gint,
NPath**,
PathCurve**,
PathSegment**);
gint gimp_path_tool_on_handles (GimpPathTool *path_tool,
gint,
gint,
gint,
NPath **,
PathCurve **,
PathSegment **);
gint path_tool_cursor_position (NPath *path,
gdouble x,
gdouble y,
gint halfwidth,
gint halfheight,
NPath **pathP,
PathCurve **curveP,
PathSegment **segmentP,
gdouble *positionP,
gint *handle_idP);
/* High level image-manipulation functions */
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void path_stroke (GimpPathTool *path_tool,
NPath *);
void path_to_selection (GimpPathTool *path_tool,
NPath *);
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#endif /* __PATH_TOOL_H__ */