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/* cairo - a vector graphics library with display and print output

 *

 * Copyright © 2002 University of Southern California

 * Copyright © 2005 Red Hat, Inc.

 *

 * This library is free software; you can redistribute it and/or

 * modify it either under the terms of the GNU Lesser General Public

 * License version 2.1 as published by the Free Software Foundation

 * (the "LGPL") or, at your option, under the terms of the Mozilla

 * Public License Version 1.1 (the "MPL"). If you do not alter this

 * notice, a recipient may use your version of this file under either

 * the MPL or the LGPL.

 *

 * You should have received a copy of the LGPL along with this library

 * in the file COPYING-LGPL-2.1; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA

 * You should have received a copy of the MPL along with this library

 * in the file COPYING-MPL-1.1

 *

 * The contents of this file are subject to the Mozilla Public License

 * Version 1.1 (the "License"); you may not use this file except in

 * compliance with the License. You may obtain a copy of the License at

 * http://www.mozilla.org/MPL/

 *

 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY

 * OF ANY KIND, either express or implied. See the LGPL or the MPL for

 * the specific language governing rights and limitations.

 *

 * The Original Code is the cairo graphics library.

 *

 * The Initial Developer of the Original Code is University of Southern

 * California.

 *

 * Contributor(s):

 *	Carl D. Worth 

 */

#ifndef CAIRO_TRAPS_PRIVATE_H

#define CAIRO_TRAPS_PRIVATE_H

#include "cairo-compiler-private.h"

#include "cairo-error-private.h"

#include "cairo-types-private.h"

CAIRO_BEGIN_DECLS

struct _cairo_traps {

    cairo_status_t status;

    cairo_box_t bounds;

    const cairo_box_t *limits;

    int num_limits;

    unsigned int maybe_region : 1; /* hint: 0 implies that it cannot be */

    unsigned int has_intersections : 1;

    unsigned int is_rectilinear : 1;

    unsigned int is_rectangular : 1;

    int num_traps;

    int traps_size;

    cairo_trapezoid_t *traps;

    cairo_trapezoid_t  traps_embedded[16];

};

/* cairo-traps.c */

cairo_private void

_cairo_traps_init (cairo_traps_t *traps);

cairo_private void

_cairo_traps_init_with_clip (cairo_traps_t *traps,

			     const cairo_clip_t *clip);

cairo_private void

_cairo_traps_limit (cairo_traps_t	*traps,

		    const cairo_box_t	*boxes,

		    int			 num_boxes);

cairo_private cairo_status_t

_cairo_traps_init_boxes (cairo_traps_t	    *traps,

		         const cairo_boxes_t *boxes);

cairo_private void

_cairo_traps_clear (cairo_traps_t *traps);

cairo_private void

_cairo_traps_fini (cairo_traps_t *traps);

#define _cairo_traps_status(T) (T)->status

cairo_private void

_cairo_traps_translate (cairo_traps_t *traps, int x, int y);

cairo_private void

_cairo_traps_tessellate_triangle (cairo_traps_t *traps,

				  const cairo_point_t t[3]);

cairo_private void

_cairo_traps_tessellate_convex_quad (cairo_traps_t *traps,

				     const cairo_point_t q[4]);

cairo_private cairo_status_t

_cairo_traps_tessellate_rectangle (cairo_traps_t *traps,

				   const cairo_point_t *top_left,

				   const cairo_point_t *bottom_right);

cairo_private void

_cairo_traps_add_trap (cairo_traps_t *traps,

		       cairo_fixed_t top, cairo_fixed_t bottom,

		       cairo_line_t *left, cairo_line_t *right);

cairo_private int

_cairo_traps_contain (const cairo_traps_t *traps,

		      double x, double y);

cairo_private void

_cairo_traps_extents (const cairo_traps_t *traps,

		      cairo_box_t         *extents);

cairo_private cairo_int_status_t

_cairo_traps_extract_region (cairo_traps_t  *traps,

			     cairo_antialias_t antialias,

			     cairo_region_t **region);

cairo_private cairo_bool_t

_cairo_traps_to_boxes (cairo_traps_t *traps,

		       cairo_antialias_t antialias,

		       cairo_boxes_t *boxes);

cairo_private cairo_status_t

_cairo_traps_path (const cairo_traps_t *traps,

		   cairo_path_fixed_t  *path);

cairo_private cairo_int_status_t

_cairo_rasterise_polygon_to_traps (cairo_polygon_t			*polygon,

				   cairo_fill_rule_t			 fill_rule,

				   cairo_antialias_t			 antialias,

				   cairo_traps_t *traps);

CAIRO_END_DECLS

#endif /* CAIRO_TRAPS_PRIVATE_H */