gimp/app/tools/path_toolP.h

135 lines
4.2 KiB
C

/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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.
*/
#ifndef __PATH_TOOLP_H__
#define __PATH_TOOLP_H__
#undef PATH_TOOL_DEBUG
#include "draw_core.h"
#ifdef PATH_TOOL_DEBUG
#include <stdio.h>
#endif
#define IMAGE_COORDS 1
#define AA_IMAGE_COORDS 2
#define SCREEN_COORDS 3
#define SEGMENT_ACTIVE 1
#define PATH_TOOL_DRAG 1
#define PATH_TOOL_REDRAW_ALL 1
#define PATH_TOOL_REDRAW_ACTIVE 2
#define PATH_TOOL_REDRAW_HANDLES 4
#define SUBDIVIDE 1000
typedef enum { SEGMENT_LINE=0, SEGMENT_BEZIER} SegmentType;
enum { ON_ANCHOR, ON_HANDLE, ON_CURVE, ON_CANVAS };
typedef struct _path_segment PathSegment;
typedef struct _path_curve PathCurve;
typedef struct _path Path;
typedef struct _path_tool PathTool;
struct _path_segment
{
SegmentType type; /* What type of segment */
gdouble x, y; /* location of starting-point in image space */
gpointer data; /* Additional data, dependant of segment-type */
guint32 flags; /* Various Flags: Is the Segment active? */
PathCurve *parent; /* the parent Curve */
PathSegment *next; /* Next Segment or NULL */
PathSegment *prev; /* Previous Segment or NULL */
};
struct _path_curve
{
PathSegment *segments; /* The segments of the curve */
PathSegment *cur_segment; /* the current segment */
Path *parent; /* the parent Path */
PathCurve *next; /* Next Curve or NULL */
PathCurve *prev; /* Previous Curve or NULL */
};
struct _path
{
PathCurve *curves; /* the curves */
PathCurve *cur_curve; /* the current curve */
GString *name; /* the name of the path */
guint32 state; /* is the path locked? */
PathTool *path_tool; /* The parent Path Tool */
};
struct _path_tool
{
gint click_type; /* where did the user click? */
gint click_x; /* X-coordinate of the click */
gint click_y; /* Y-coordinate of the click */
gint click_halfwidth;
guint click_modifier; /* what modifiers were pressed? */
Path *click_path; /* On which Path/Curve/Segment */
PathCurve *click_curve; /* was the click? */
PathSegment *click_segment;
gdouble click_position; /* The position on the segment */
gint click_handle_id; /* The handle ID of the segment */
gint active_count; /* How many segments are active? */
/*
* WARNING: single_active_segment may contain non NULL Values
* which point to the nirvana. But they are important!
* The pointer is garantueed to be valid, when active_count==1
*/
PathSegment *single_active_segment; /* The only active segment */
gint state; /* state of tool */
gint draw; /* all or part */
DrawCore *core; /* Core drawing object */
Path *cur_path; /* the current active path */
GSList **scanlines; /* used in converting a path */
};
typedef void
(*PathTraverseFunc) (Path *,
PathCurve *,
gpointer);
typedef void
(*CurveTraverseFunc) (Path *,
PathCurve *,
PathSegment *,
gpointer);
typedef void
(*SegmentTraverseFunc) (Path *,
PathCurve *,
PathSegment *,
gint,
gint,
gpointer);
#endif /* __PATH_TOOLP_H__ */