forked from KolibriOS/kolibrios
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2011 Intel Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is Intel Corporation
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*
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* Contributor(s):
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* Chris Wilson <chris@chris-wilson.co.uk>
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*/
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#ifndef CAIRO_CONTOUR_PRIVATE_H
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#define CAIRO_CONTOUR_PRIVATE_H
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#include "cairo-types-private.h"
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#include "cairo-compiler-private.h"
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#include "cairo-error-private.h"
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#include "cairo-list-private.h"
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#include <stdio.h>
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CAIRO_BEGIN_DECLS
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/* A contour is simply a closed chain of points that divide the infinite plane
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* into inside and outside. Each contour is a simple polygon, that is it
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* contains no holes or self-intersections, but maybe either concave or convex.
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*/
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struct _cairo_contour_chain {
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cairo_point_t *points;
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int num_points, size_points;
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struct _cairo_contour_chain *next;
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};
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struct _cairo_contour_iter {
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cairo_point_t *point;
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cairo_contour_chain_t *chain;
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};
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struct _cairo_contour {
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cairo_list_t next;
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int direction;
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cairo_contour_chain_t chain, *tail;
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cairo_point_t embedded_points[64];
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};
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/* Initial definition of a shape is a set of contours (some representing holes) */
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struct _cairo_shape {
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cairo_list_t contours;
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};
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typedef struct _cairo_shape cairo_shape_t;
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#if 0
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cairo_private cairo_status_t
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_cairo_shape_init_from_polygon (cairo_shape_t *shape,
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const cairo_polygon_t *polygon);
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cairo_private cairo_status_t
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_cairo_shape_reduce (cairo_shape_t *shape, double tolerance);
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#endif
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cairo_private void
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_cairo_contour_init (cairo_contour_t *contour,
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int direction);
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cairo_private cairo_int_status_t
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__cairo_contour_add_point (cairo_contour_t *contour,
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const cairo_point_t *point);
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cairo_private void
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_cairo_contour_simplify (cairo_contour_t *contour, double tolerance);
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cairo_private void
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_cairo_contour_reverse (cairo_contour_t *contour);
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cairo_private cairo_int_status_t
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_cairo_contour_add (cairo_contour_t *dst,
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const cairo_contour_t *src);
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cairo_private cairo_int_status_t
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_cairo_contour_add_reversed (cairo_contour_t *dst,
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const cairo_contour_t *src);
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cairo_private void
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__cairo_contour_remove_last_chain (cairo_contour_t *contour);
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cairo_private void
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_cairo_contour_reset (cairo_contour_t *contour);
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cairo_private void
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_cairo_contour_fini (cairo_contour_t *contour);
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cairo_private void
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_cairo_debug_print_contour (FILE *file, cairo_contour_t *contour);
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CAIRO_END_DECLS
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#endif /* CAIRO_CONTOUR_PRIVATE_H */
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