1/*
2 * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
3 * Copyright (C) 2005 Nokia. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "FloatPoint.h"
29
30#include "AffineTransform.h"
31#include "FloatConversion.h"
32#include "IntPoint.h"
33#include "TransformationMatrix.h"
34#include <limits>
35#include <math.h>
36#include <wtf/text/TextStream.h>
37
38namespace WebCore {
39
40FloatPoint::FloatPoint(const IntPoint& p) : m_x(p.x()), m_y(p.y())
41{
42}
43
44FloatPoint FloatPoint::constrainedBetween(const FloatPoint& min, const FloatPoint& max) const
45{
46 return {
47 std::max(min.x(), std::min(max.x(), m_x)),
48 std::max(min.y(), std::min(max.y(), m_y))
49 };
50}
51
52void FloatPoint::normalize()
53{
54 float tempLength = length();
55
56 if (tempLength) {
57 m_x /= tempLength;
58 m_y /= tempLength;
59 }
60}
61
62float FloatPoint::slopeAngleRadians() const
63{
64 return atan2f(m_y, m_x);
65}
66
67float FloatPoint::length() const
68{
69 return sqrtf(lengthSquared());
70}
71
72FloatPoint FloatPoint::matrixTransform(const AffineTransform& transform) const
73{
74 double newX, newY;
75 transform.map(static_cast<double>(m_x), static_cast<double>(m_y), newX, newY);
76 return narrowPrecision(newX, newY);
77}
78
79FloatPoint FloatPoint::matrixTransform(const TransformationMatrix& transform) const
80{
81 double newX, newY;
82 transform.map(static_cast<double>(m_x), static_cast<double>(m_y), newX, newY);
83 return narrowPrecision(newX, newY);
84}
85
86FloatPoint FloatPoint::narrowPrecision(double x, double y)
87{
88 return FloatPoint(narrowPrecisionToFloat(x), narrowPrecisionToFloat(y));
89}
90
91TextStream& operator<<(TextStream& ts, const FloatPoint& p)
92{
93 // FIXME: callers should use the NumberRespectingIntegers flag.
94 return ts << "(" << TextStream::FormatNumberRespectingIntegers(p.x()) << "," << TextStream::FormatNumberRespectingIntegers(p.y()) << ")";
95}
96
97}
98