cairo-path-fixed-private.h   [plain text]

/* cairo - a vector graphics library with display and print output
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 Red Hat, Inc.
 *
 * Contributor(s):
 *	Carl D. Worth <cworth@redhat.com>
 */

#ifndef CAIRO_PATH_FIXED_PRIVATE_H
#define CAIRO_PATH_FIXED_PRIVATE_H

#include "cairo-types-private.h"

enum cairo_path_op {
    CAIRO_PATH_OP_MOVE_TO = 0,
    CAIRO_PATH_OP_LINE_TO = 1,
    CAIRO_PATH_OP_CURVE_TO = 2,
    CAIRO_PATH_OP_CLOSE_PATH = 3
};
/* we want to make sure a single byte is used for thie enum */
typedef char cairo_path_op_t;

/* make _cairo_path_fixed fit a 512 bytes.  about 50 items */
#define CAIRO_PATH_BUF_SIZE ((512 - 4 * sizeof (void*) - sizeof (cairo_path_buf_t)) \
			   / (2 * sizeof (cairo_point_t) + sizeof (cairo_path_op_t)))

typedef struct _cairo_path_buf {
    struct _cairo_path_buf *next, *prev;
    int buf_size;
    int num_ops;
    int num_points;

    cairo_path_op_t *op;
    cairo_point_t *points;
} cairo_path_buf_t;
typedef struct _cairo_path_buf_fixed {
    cairo_path_buf_t base;

    cairo_path_op_t op[CAIRO_PATH_BUF_SIZE];
    cairo_point_t points[2 * CAIRO_PATH_BUF_SIZE];
} cairo_path_buf_fixed_t;

struct _cairo_path_fixed {
    cairo_point_t last_move_point;
    cairo_point_t current_point;
    unsigned int has_current_point	: 1;
    unsigned int has_curve_to		: 1;

    cairo_path_buf_t       *buf_tail;
    cairo_path_buf_fixed_t  buf_head;
};

#endif /* CAIRO_PATH_FIXED_PRIVATE_H */