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| 3959 | Serge | 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 |
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| 3 | * |
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| 4 | * Copyright © 2010 Andrea Canciani |
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| 5 | * |
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| 6 | * This library is free software; you can redistribute it and/or |
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| 7 | * modify it either under the terms of the GNU Lesser General Public |
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| 8 | * License version 2.1 as published by the Free Software Foundation |
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| 9 | * (the "LGPL") or, at your option, under the terms of the Mozilla |
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| 10 | * Public License Version 1.1 (the "MPL"). If you do not alter this |
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| 11 | * notice, a recipient may use your version of this file under either |
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| 12 | * the MPL or the LGPL. |
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| 13 | * |
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| 14 | * You should have received a copy of the LGPL along with this library |
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| 15 | * in the file COPYING-LGPL-2.1; if not, write to the Free Software |
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| 16 | * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA |
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| 17 | * You should have received a copy of the MPL along with this library |
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| 18 | * in the file COPYING-MPL-1.1 |
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| 19 | * |
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| 20 | * The contents of this file are subject to the Mozilla Public License |
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| 21 | * Version 1.1 (the "License"); you may not use this file except in |
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| 22 | * compliance with the License. You may obtain a copy of the License at |
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| 23 | * http://www.mozilla.org/MPL/ |
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| 24 | * |
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| 25 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY |
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| 26 | * OF ANY KIND, either express or implied. See the LGPL or the MPL for |
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| 27 | * the specific language governing rights and limitations. |
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| 28 | * |
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| 29 | * The Original Code is the cairo graphics library. |
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| 30 | * |
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| 31 | * Contributor(s): |
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| 32 | * Andrea Canciani |
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| 33 | */ |
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| 34 | |||
| 35 | #ifndef CAIRO_BOX_H |
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| 36 | #define CAIRO_BOX_H |
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| 37 | |||
| 38 | #include "cairo-types-private.h" |
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| 39 | #include "cairo-compiler-private.h" |
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| 40 | #include "cairo-fixed-private.h" |
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| 41 | |||
| 42 | static inline void |
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| 43 | _cairo_box_set (cairo_box_t *box, |
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| 44 | const cairo_point_t *p1, |
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| 45 | const cairo_point_t *p2) |
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| 46 | { |
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| 47 | box->p1 = *p1; |
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| 48 | box->p2 = *p2; |
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| 49 | } |
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| 50 | |||
| 51 | static inline void |
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| 52 | _cairo_box_from_integers (cairo_box_t *box, int x, int y, int w, int h) |
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| 53 | { |
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| 54 | box->p1.x = _cairo_fixed_from_int (x); |
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| 55 | box->p1.y = _cairo_fixed_from_int (y); |
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| 56 | box->p2.x = _cairo_fixed_from_int (x + w); |
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| 57 | box->p2.y = _cairo_fixed_from_int (y + h); |
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| 58 | } |
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| 59 | |||
| 60 | /* assumes box->p1 is top-left, p2 bottom-right */ |
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| 61 | static inline void |
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| 62 | _cairo_box_add_point (cairo_box_t *box, |
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| 63 | const cairo_point_t *point) |
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| 64 | { |
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| 65 | if (point->x < box->p1.x) |
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| 66 | box->p1.x = point->x; |
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| 67 | else if (point->x > box->p2.x) |
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| 68 | box->p2.x = point->x; |
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| 69 | |||
| 70 | if (point->y < box->p1.y) |
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| 71 | box->p1.y = point->y; |
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| 72 | else if (point->y > box->p2.y) |
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| 73 | box->p2.y = point->y; |
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| 74 | } |
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| 75 | |||
| 76 | static inline void |
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| 77 | _cairo_box_add_box (cairo_box_t *box, |
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| 78 | const cairo_box_t *add) |
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| 79 | { |
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| 80 | if (add->p1.x < box->p1.x) |
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| 81 | box->p1.x = add->p1.x; |
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| 82 | if (add->p2.x > box->p2.x) |
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| 83 | box->p2.x = add->p2.x; |
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| 84 | |||
| 85 | if (add->p1.y < box->p1.y) |
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| 86 | box->p1.y = add->p1.y; |
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| 87 | if (add->p2.y > box->p2.y) |
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| 88 | box->p2.y = add->p2.y; |
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| 89 | } |
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| 90 | |||
| 91 | /* assumes box->p1 is top-left, p2 bottom-right */ |
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| 92 | static inline cairo_bool_t |
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| 93 | _cairo_box_contains_point (const cairo_box_t *box, |
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| 94 | const cairo_point_t *point) |
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| 95 | { |
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| 96 | return box->p1.x <= point->x && point->x <= box->p2.x && |
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| 97 | box->p1.y <= point->y && point->y <= box->p2.y; |
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| 98 | } |
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| 99 | |||
| 100 | static inline cairo_bool_t |
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| 101 | _cairo_box_is_pixel_aligned (const cairo_box_t *box) |
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| 102 | { |
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| 103 | #if CAIRO_FIXED_FRAC_BITS <= 8 && 0 |
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| 104 | return ((box->p1.x & CAIRO_FIXED_FRAC_MASK) << 24 | |
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| 105 | (box->p1.y & CAIRO_FIXED_FRAC_MASK) << 16 | |
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| 106 | (box->p2.x & CAIRO_FIXED_FRAC_MASK) << 8 | |
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| 107 | (box->p2.y & CAIRO_FIXED_FRAC_MASK) << 0) == 0; |
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| 108 | #else /* GCC on i7 prefers this variant (bizarrely according to the profiler) */ |
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| 109 | cairo_fixed_t f; |
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| 110 | |||
| 111 | f = 0; |
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| 112 | f |= box->p1.x & CAIRO_FIXED_FRAC_MASK; |
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| 113 | f |= box->p1.y & CAIRO_FIXED_FRAC_MASK; |
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| 114 | f |= box->p2.x & CAIRO_FIXED_FRAC_MASK; |
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| 115 | f |= box->p2.y & CAIRO_FIXED_FRAC_MASK; |
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| 116 | |||
| 117 | return f == 0; |
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| 118 | #endif |
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| 119 | } |
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| 120 | |||
| 121 | #endif /* CAIRO_BOX_H */ |