KHtml

AffineTransform.cpp
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25 
26 #include "wtf/Platform.h"
27 #include "AffineTransform.h"
28 
29 #include "FloatRect.h"
30 #include "IntRect.h"
31 
32 #include <wtf/MathExtras.h>
33 
34 namespace WebCore
35 {
36 
37 bool AffineTransform::isInvertible() const
38 {
39  return det() != 0.0;
40 }
41 
42 AffineTransform &AffineTransform::multiply(const AffineTransform &other)
43 {
44  return (*this) *= other;
45 }
46 
47 AffineTransform &AffineTransform::scale(double s)
48 {
49  return scale(s, s);
50 }
51 
52 AffineTransform &AffineTransform::scaleNonUniform(double sx, double sy)
53 {
54  return scale(sx, sy);
55 }
56 
57 AffineTransform &AffineTransform::rotateFromVector(double x, double y)
58 {
59  return rotate(rad2deg(atan2(y, x)));
60 }
61 
62 AffineTransform &AffineTransform::flipX()
63 {
64  return scale(-1.0f, 1.0f);
65 }
66 
67 AffineTransform &AffineTransform::flipY()
68 {
69  return scale(1.0f, -1.0f);
70 }
71 
72 AffineTransform &AffineTransform::skew(double angleX, double angleY)
73 {
74  return shear(tan(deg2rad(angleX)), tan(deg2rad(angleY)));
75 }
76 
77 AffineTransform &AffineTransform::skewX(double angle)
78 {
79  return shear(tan(deg2rad(angle)), 0.0f);
80 }
81 
82 AffineTransform &AffineTransform::skewY(double angle)
83 {
84  return shear(0.0f, tan(deg2rad(angle)));
85 }
86 
87 IntPoint 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 
96 FloatPoint 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 }
QFuture< void > map(Sequence &sequence, MapFunctor function)
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