/* cairo - a vector graphics library with display and print output
*
* Copyright © 2011 Intel Corporation
*
* 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 Intel Corporation
*
* Contributor ( s ) :
* Chris Wilson < chris @ chris - wilson . co . uk >
*/
#ifndef CAIRO_CONTOUR_PRIVATE_H
#define CAIRO_CONTOUR_PRIVATE_H
#include "cairo-types-private.h"
#include "cairo-compiler-private.h"
#include "cairo-error-private.h"
#include "cairo-list-private.h"
#include <stdio.h>
CAIRO_BEGIN_DECLS
/* A contour is simply a closed chain of points that divide the infinite plane
* into inside and outside . Each contour is a simple polygon , that is it
* contains no holes or self - intersections , but maybe either concave or convex .
*/
struct _cairo_contour_chain {
cairo_point_t *points;
int num_points, size_points;
struct _cairo_contour_chain *next;
};
struct _cairo_contour_iter {
cairo_point_t *point;
cairo_contour_chain_t *chain;
};
struct _cairo_contour {
cairo_list_t next;
int direction;
cairo_contour_chain_t chain, *tail;
cairo_point_t embedded_points[64 ];
};
/* Initial definition of a shape is a set of contours (some representing holes) */
struct _cairo_shape {
cairo_list_t contours;
};
typedef struct _cairo_shape cairo_shape_t;
#if 0
cairo_private cairo_status_t
_cairo_shape_init_from_polygon (cairo_shape_t *shape,
const cairo_polygon_t *polygon);
cairo_private cairo_status_t
_cairo_shape_reduce (cairo_shape_t *shape, double tolerance);
#endif
cairo_private void
_cairo_contour_init (cairo_contour_t *contour,
int direction);
cairo_private cairo_int_status_t
__cairo_contour_add_point (cairo_contour_t *contour,
const cairo_point_t *point);
cairo_private void
_cairo_contour_simplify (cairo_contour_t *contour, double tolerance);
cairo_private void
_cairo_contour_reverse (cairo_contour_t *contour);
cairo_private cairo_int_status_t
_cairo_contour_add (cairo_contour_t *dst,
const cairo_contour_t *src);
cairo_private cairo_int_status_t
_cairo_contour_add_reversed (cairo_contour_t *dst,
const cairo_contour_t *src);
cairo_private void
__cairo_contour_remove_last_chain (cairo_contour_t *contour);
cairo_private void
_cairo_contour_reset (cairo_contour_t *contour);
cairo_private void
_cairo_contour_fini (cairo_contour_t *contour);
cairo_private void
_cairo_debug_print_contour (FILE *file, cairo_contour_t *contour);
CAIRO_END_DECLS
#endif /* CAIRO_CONTOUR_PRIVATE_H */
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