gimp/app/scan_convert.h

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995-1999 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 SCAN_CONVERT_H
#define SCAN_CONVERT_H
#include <glib.h>
#include "channel.h"
typedef struct {
gdouble x;
gdouble y;
} ScanConvertPoint;
typedef struct ScanConverterPrivate ScanConverter;
/* Create a new scan conversion context. Set "antialias" to 1 for no
* supersampling, or the amount to supersample by otherwise. */
ScanConverter * scan_converter_new (guint width, guint height,
guint antialias);
/* Add "npoints" from "pointlist" to the polygon currently being
* described by "scan_converter". */
void scan_converter_add_points (ScanConverter *scan_converter,
guint npoints,
ScanConvertPoint *pointlist);
/* Scan convert the polygon described by the list of points passed to
* scan_convert_add_points, and return a channel with a bits set if
* they fall within the polygon defined. The polygon is filled
* according to the even-odd rule. The polygon is closed by
* joining the final point to the initial point. */
Channel * scan_converter_to_channel (ScanConverter *scan_converter,
GimpImage *gimage);
void scan_converter_free (ScanConverter *scan_converter);
#endif /* SCAN_CONVERT_H */