1 /* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
2 /* cairo - a vector graphics library with display and print output
3 *
4 * Copyright © 2010 Andrea Canciani
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it either under the terms of the GNU Lesser General Public
8 * License version 2.1 as published by the Free Software Foundation
9 * (the "LGPL") or, at your option, under the terms of the Mozilla
10 * Public License Version 1.1 (the "MPL"). If you do not alter this
11 * notice, a recipient may use your version of this file under either
12 * the MPL or the LGPL.
13 *
14 * You should have received a copy of the LGPL along with this library
15 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
17 * You should have received a copy of the MPL along with this library
18 * in the file COPYING-MPL-1.1
19 *
20 * The contents of this file are subject to the Mozilla Public License
21 * Version 1.1 (the "License"); you may not use this file except in
22 * compliance with the License. You may obtain a copy of the License at
23 * http://www.mozilla.org/MPL/
24 *
25 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
26 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
27 * the specific language governing rights and limitations.
28 *
29 * The Original Code is the cairo graphics library.
30 *
31 * Contributor(s):
32 * Andrea Canciani <ranma42@gmail.com>
33 */
34
35 #ifndef CAIRO_BOX_H
36 #define CAIRO_BOX_H
37
38 #include "cairo-types-private.h"
39 #include "cairo-compiler-private.h"
40 #include "cairo-fixed-private.h"
41
42 static inline void
_cairo_box_set(cairo_box_t * box,const cairo_point_t * p1,const cairo_point_t * p2)43 _cairo_box_set (cairo_box_t *box,
44 const cairo_point_t *p1,
45 const cairo_point_t *p2)
46 {
47 box->p1 = *p1;
48 box->p2 = *p2;
49 }
50
51 static inline void
_cairo_box_from_integers(cairo_box_t * box,int x,int y,int w,int h)52 _cairo_box_from_integers (cairo_box_t *box, int x, int y, int w, int h)
53 {
54 box->p1.x = _cairo_fixed_from_int (x);
55 box->p1.y = _cairo_fixed_from_int (y);
56 box->p2.x = _cairo_fixed_from_int (x + w);
57 box->p2.y = _cairo_fixed_from_int (y + h);
58 }
59
60 static inline void
_cairo_box_from_rectangle_int(cairo_box_t * box,const cairo_rectangle_int_t * rect)61 _cairo_box_from_rectangle_int (cairo_box_t *box,
62 const cairo_rectangle_int_t *rect)
63 {
64 box->p1.x = _cairo_fixed_from_int (rect->x);
65 box->p1.y = _cairo_fixed_from_int (rect->y);
66 box->p2.x = _cairo_fixed_from_int (rect->x + rect->width);
67 box->p2.y = _cairo_fixed_from_int (rect->y + rect->height);
68 }
69
70 /* assumes box->p1 is top-left, p2 bottom-right */
71 static inline void
_cairo_box_add_point(cairo_box_t * box,const cairo_point_t * point)72 _cairo_box_add_point (cairo_box_t *box,
73 const cairo_point_t *point)
74 {
75 if (point->x < box->p1.x)
76 box->p1.x = point->x;
77 else if (point->x > box->p2.x)
78 box->p2.x = point->x;
79
80 if (point->y < box->p1.y)
81 box->p1.y = point->y;
82 else if (point->y > box->p2.y)
83 box->p2.y = point->y;
84 }
85
86 static inline void
_cairo_box_add_box(cairo_box_t * box,const cairo_box_t * add)87 _cairo_box_add_box (cairo_box_t *box,
88 const cairo_box_t *add)
89 {
90 if (add->p1.x < box->p1.x)
91 box->p1.x = add->p1.x;
92 if (add->p2.x > box->p2.x)
93 box->p2.x = add->p2.x;
94
95 if (add->p1.y < box->p1.y)
96 box->p1.y = add->p1.y;
97 if (add->p2.y > box->p2.y)
98 box->p2.y = add->p2.y;
99 }
100
101 /* assumes box->p1 is top-left, p2 bottom-right */
102 static inline cairo_bool_t
_cairo_box_contains_point(const cairo_box_t * box,const cairo_point_t * point)103 _cairo_box_contains_point (const cairo_box_t *box,
104 const cairo_point_t *point)
105 {
106 return box->p1.x <= point->x && point->x <= box->p2.x &&
107 box->p1.y <= point->y && point->y <= box->p2.y;
108 }
109
110 static inline cairo_bool_t
_cairo_box_is_pixel_aligned(const cairo_box_t * box)111 _cairo_box_is_pixel_aligned (const cairo_box_t *box)
112 {
113 #if CAIRO_FIXED_FRAC_BITS <= 8 && 0
114 return ((cairo_fixed_unsigned_t)(box->p1.x & CAIRO_FIXED_FRAC_MASK) << 24 |
115 (box->p1.y & CAIRO_FIXED_FRAC_MASK) << 16 |
116 (box->p2.x & CAIRO_FIXED_FRAC_MASK) << 8 |
117 (box->p2.y & CAIRO_FIXED_FRAC_MASK) << 0) == 0;
118 #else /* GCC on i7 prefers this variant (bizarrely according to the profiler) */
119 cairo_fixed_t f;
120
121 f = 0;
122 f |= box->p1.x & CAIRO_FIXED_FRAC_MASK;
123 f |= box->p1.y & CAIRO_FIXED_FRAC_MASK;
124 f |= box->p2.x & CAIRO_FIXED_FRAC_MASK;
125 f |= box->p2.y & CAIRO_FIXED_FRAC_MASK;
126
127 return f == 0;
128 #endif
129 }
130
131 #endif /* CAIRO_BOX_H */
132