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