source/libs/cairo/cairo-src/src/cairo-box-inline.h

   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
  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
  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 /* assumes box->p1 is top-left, p2 bottom-right */
  61 static inline void
  62 _cairo_box_add_point (cairo_box_t *box,
  63                       const cairo_point_t *point)
  64 {
  65     if (point->x < box->p1.x)
  66         box->p1.x = point->x;
  67     else if (point->x > box->p2.x)
  68         box->p2.x = point->x;
  69
  70     if (point->y < box->p1.y)
  71         box->p1.y = point->y;
  72     else if (point->y > box->p2.y)
  73         box->p2.y = point->y;
  74 }
  75
  76 static inline void
  77 _cairo_box_add_box (cairo_box_t *box,
  78                     const cairo_box_t *add)
  79 {
  80     if (add->p1.x < box->p1.x)
  81         box->p1.x = add->p1.x;
  82     if (add->p2.x > box->p2.x)
  83         box->p2.x = add->p2.x;
  84
  85     if (add->p1.y < box->p1.y)
  86         box->p1.y = add->p1.y;
  87     if (add->p2.y > box->p2.y)
  88         box->p2.y = add->p2.y;
  89 }
  90
  91 /* assumes box->p1 is top-left, p2 bottom-right */
  92 static inline cairo_bool_t
  93 _cairo_box_contains_point (const cairo_box_t *box,
  94                            const cairo_point_t *point)
  95 {
  96     return box->p1.x <= point->x  && point->x <= box->p2.x &&
  97         box->p1.y <= point->y  && point->y <= box->p2.y;
  98 }
  99
 100 static inline cairo_bool_t
 101 _cairo_box_is_pixel_aligned (const cairo_box_t *box)
 102 {
 103 #if CAIRO_FIXED_FRAC_BITS <= 8 && 0
 104     return ((box->p1.x & CAIRO_FIXED_FRAC_MASK) << 24 |
 105             (box->p1.y & CAIRO_FIXED_FRAC_MASK) << 16 |
 106             (box->p2.x & CAIRO_FIXED_FRAC_MASK) << 8 |
 107             (box->p2.y & CAIRO_FIXED_FRAC_MASK) << 0) == 0;
 108 #else /* GCC on i7 prefers this variant (bizarrely according to the profiler) */
 109     cairo_fixed_t f;
 110
 111     f = 0;
 112     f |= box->p1.x & CAIRO_FIXED_FRAC_MASK;
 113     f |= box->p1.y & CAIRO_FIXED_FRAC_MASK;
 114     f |= box->p2.x & CAIRO_FIXED_FRAC_MASK;
 115     f |= box->p2.y & CAIRO_FIXED_FRAC_MASK;
 116
 117     return f == 0;
 118 #endif
 119 }
 120
 121 #endif /* CAIRO_BOX_H */