Source code
Revision control
Copy as Markdown
Other Tools
/* 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
*
* 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 <cworth@cworth.org>
*/
#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_with_edges (cairo_traps_t *traps,
const cairo_point_t t[3],
const cairo_point_t edges[4]);
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,
const cairo_line_t *left,
const 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 */