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91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2003 University of Southern California
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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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* The Initial Developer of the Original Code is University of Southern
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* California.
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*
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* Contributor(s):
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* Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairoint.h"
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cairo_fixed_t
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_cairo_fixed_from_int (int i)
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{
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return i << 16;
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}
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cairo_fixed_t
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_cairo_fixed_from_double (double d)
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{
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return (cairo_fixed_t) floor (d * 65536 + 0.5);
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}
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cairo_fixed_t
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_cairo_fixed_from_26_6 (uint32_t i)
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{
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return i << 10;
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}
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double
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_cairo_fixed_to_double (cairo_fixed_t f)
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{
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return ((double) f) / 65536.0;
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}
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int
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_cairo_fixed_is_integer (cairo_fixed_t f)
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{
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return (f & 0xFFFF) == 0;
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}
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int
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_cairo_fixed_integer_part (cairo_fixed_t f)
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{
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return f >> 16;
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}
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int
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_cairo_fixed_integer_floor (cairo_fixed_t f)
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{
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if (f >= 0)
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return f >> 16;
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else
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return -((-f - 1) >> 16) - 1;
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}
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int
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_cairo_fixed_integer_ceil (cairo_fixed_t f)
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{
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if (f > 0)
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return ((f - 1)>>16) + 1;
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else
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return - (-f >> 16);
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}
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