blob: d6b994127e3a68760abc287fd3b384b9b1100a52 [file] [log] [blame]
/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2010 Andrea Canciani
*
* 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.
*
* Contributor(s):
* Andrea Canciani <ranma42@gmail.com>
*/
#ifndef CAIRO_BOX_H
#define CAIRO_BOX_H
#include "cairo-types-private.h"
#include "cairo-compiler-private.h"
#include "cairo-fixed-private.h"
static inline void
_cairo_box_set (cairo_box_t *box,
const cairo_point_t *p1,
const cairo_point_t *p2)
{
box->p1 = *p1;
box->p2 = *p2;
}
static inline void
_cairo_box_from_integers (cairo_box_t *box, int x, int y, int w, int h)
{
box->p1.x = _cairo_fixed_from_int (x);
box->p1.y = _cairo_fixed_from_int (y);
box->p2.x = _cairo_fixed_from_int (x + w);
box->p2.y = _cairo_fixed_from_int (y + h);
}
/* assumes box->p1 is top-left, p2 bottom-right */
static inline void
_cairo_box_add_point (cairo_box_t *box,
const cairo_point_t *point)
{
if (point->x < box->p1.x)
box->p1.x = point->x;
else if (point->x > box->p2.x)
box->p2.x = point->x;
if (point->y < box->p1.y)
box->p1.y = point->y;
else if (point->y > box->p2.y)
box->p2.y = point->y;
}
static inline void
_cairo_box_add_box (cairo_box_t *box,
const cairo_box_t *add)
{
if (add->p1.x < box->p1.x)
box->p1.x = add->p1.x;
if (add->p2.x > box->p2.x)
box->p2.x = add->p2.x;
if (add->p1.y < box->p1.y)
box->p1.y = add->p1.y;
if (add->p2.y > box->p2.y)
box->p2.y = add->p2.y;
}
/* assumes box->p1 is top-left, p2 bottom-right */
static inline cairo_bool_t
_cairo_box_contains_point (const cairo_box_t *box,
const cairo_point_t *point)
{
return box->p1.x <= point->x && point->x <= box->p2.x &&
box->p1.y <= point->y && point->y <= box->p2.y;
}
static inline cairo_bool_t
_cairo_box_is_pixel_aligned (const cairo_box_t *box)
{
#if CAIRO_FIXED_FRAC_BITS <= 8 && 0
return ((box->p1.x & CAIRO_FIXED_FRAC_MASK) << 24 |
(box->p1.y & CAIRO_FIXED_FRAC_MASK) << 16 |
(box->p2.x & CAIRO_FIXED_FRAC_MASK) << 8 |
(box->p2.y & CAIRO_FIXED_FRAC_MASK) << 0) == 0;
#else /* GCC on i7 prefers this variant (bizarrely according to the profiler) */
cairo_fixed_t f;
f = 0;
f |= box->p1.x & CAIRO_FIXED_FRAC_MASK;
f |= box->p1.y & CAIRO_FIXED_FRAC_MASK;
f |= box->p2.x & CAIRO_FIXED_FRAC_MASK;
f |= box->p2.y & CAIRO_FIXED_FRAC_MASK;
return f == 0;
#endif
}
#endif /* CAIRO_BOX_H */