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AffineTransform.cpp
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1/*
2 * Copyright (C) 2005, 2006 Apple Computer, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "wtf/Platform.h"
28#include "AffineTransform.h"
29
30#include "FloatRect.h"
31#include "IntRect.h"
32
33#include <wtf/MathExtras.h>
34
35namespace WebCore {
36
37bool AffineTransform::isInvertible() const
38{
39 return det() != 0.0;
40}
41
42AffineTransform& AffineTransform::multiply(const AffineTransform& other)
43{
44 return (*this) *= other;
45}
46
47AffineTransform& AffineTransform::scale(double s)
48{
49 return scale(s, s);
50}
51
52AffineTransform& AffineTransform::scaleNonUniform(double sx, double sy)
53{
54 return scale(sx, sy);
55}
56
57AffineTransform& AffineTransform::rotateFromVector(double x, double y)
58{
59 return rotate(rad2deg(atan2(y, x)));
60}
61
62AffineTransform& AffineTransform::flipX()
63{
64 return scale(-1.0f, 1.0f);
65}
66
67AffineTransform& AffineTransform::flipY()
68{
69 return scale(1.0f, -1.0f);
70}
71
72AffineTransform& AffineTransform::skew(double angleX, double angleY)
73{
74 return shear(tan(deg2rad(angleX)), tan(deg2rad(angleY)));
75}
76
77AffineTransform& AffineTransform::skewX(double angle)
78{
79 return shear(tan(deg2rad(angle)), 0.0f);
80}
81
82AffineTransform& AffineTransform::skewY(double angle)
83{
84 return shear(0.0f, tan(deg2rad(angle)));
85}
86
87IntPoint AffineTransform::mapPoint(const IntPoint& point) const
88{
89 double x2, y2;
90 map(point.x(), point.y(), &x2, &y2);
91
92 // Round the point.
93 return IntPoint(lround(x2), lround(y2));
94}
95
96FloatPoint AffineTransform::mapPoint(const FloatPoint& point) const
97{
98 double x2, y2;
99 map(point.x(), point.y(), &x2, &y2);
100
101 return FloatPoint(static_cast<float>(x2), static_cast<float>(y2));
102}
103
104}
AffineTransform.h
FloatRect.h
IntRect.h
WebCore::AffineTransform
Definition: AffineTransform.h:47
WebCore::AffineTransform::isInvertible
bool isInvertible() const
Definition: AffineTransform.cpp:37
WebCore::AffineTransform::skewX
AffineTransform & skewX(double angle)
Definition: AffineTransform.cpp:77
WebCore::AffineTransform::flipX
AffineTransform & flipX()
Definition: AffineTransform.cpp:62
WebCore::AffineTransform::rotate
AffineTransform & rotate(double d)
Definition: AffineTransformQt.cpp:149
WebCore::AffineTransform::shear
AffineTransform & shear(double sx, double sy)
Definition: AffineTransformQt.cpp:161
WebCore::AffineTransform::skew
AffineTransform & skew(double angleX, double angleY)
Definition: AffineTransform.cpp:72
WebCore::AffineTransform::scaleNonUniform
AffineTransform & scaleNonUniform(double sx, double sy)
Definition: AffineTransform.cpp:52
WebCore::AffineTransform::det
double det() const
Definition: AffineTransformQt.cpp:167
WebCore::AffineTransform::flipY
AffineTransform & flipY()
Definition: AffineTransform.cpp:67
WebCore::AffineTransform::map
void map(double x, double y, double *x2, double *y2) const
Definition: AffineTransformQt.cpp:55
WebCore::AffineTransform::skewY
AffineTransform & skewY(double angle)
Definition: AffineTransform.cpp:82
WebCore::AffineTransform::scale
AffineTransform & scale(double)
Definition: AffineTransform.cpp:47
WebCore::AffineTransform::mapPoint
IntPoint mapPoint(const IntPoint &) const
Definition: AffineTransform.cpp:87
WebCore::AffineTransform::rotateFromVector
AffineTransform & rotateFromVector(double x, double y)
Definition: AffineTransform.cpp:57
WebCore::AffineTransform::multiply
AffineTransform & multiply(const AffineTransform &)
Definition: AffineTransform.cpp:42
WebCore::FloatPoint
Definition: FloatPoint.h:61
WebCore::FloatPoint::y
float y() const
Definition: FloatPoint.h:70
WebCore::FloatPoint::x
float x() const
Definition: FloatPoint.h:69
WebCore::IntPoint
Definition: IntPoint.h:64
WebCore::IntPoint::x
int x() const
Definition: IntPoint.h:69
WebCore::IntPoint::y
int y() const
Definition: IntPoint.h:70
WebCore
Definition: CSSHelper.h:7
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