Source code
Revision control
Copy as Markdown
Other Tools
/* 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
*
* 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 */