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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef UI_GFX_QUAD_F_H_ | 5 // TODO(beng): remove once callsites are patched. |
6 #define UI_GFX_QUAD_F_H_ | 6 #include "ui/gfx/geometry/quad_f.h" |
7 | 7 |
8 #include <algorithm> | |
9 #include <cmath> | |
10 #include <string> | |
11 | |
12 #include "ui/gfx/gfx_export.h" | |
13 #include "ui/gfx/point_f.h" | |
14 #include "ui/gfx/rect_f.h" | |
15 | |
16 namespace gfx { | |
17 | |
18 // A Quad is defined by four corners, allowing it to have edges that are not | |
19 // axis-aligned, unlike a Rect. | |
20 class GFX_EXPORT QuadF { | |
21 public: | |
22 QuadF() {} | |
23 QuadF(const PointF& p1, const PointF& p2, const PointF& p3, const PointF& p4) | |
24 : p1_(p1), | |
25 p2_(p2), | |
26 p3_(p3), | |
27 p4_(p4) {} | |
28 | |
29 explicit QuadF(const RectF& rect) | |
30 : p1_(rect.x(), rect.y()), | |
31 p2_(rect.right(), rect.y()), | |
32 p3_(rect.right(), rect.bottom()), | |
33 p4_(rect.x(), rect.bottom()) {} | |
34 | |
35 void operator=(const RectF& rect); | |
36 | |
37 void set_p1(const PointF& p) { p1_ = p; } | |
38 void set_p2(const PointF& p) { p2_ = p; } | |
39 void set_p3(const PointF& p) { p3_ = p; } | |
40 void set_p4(const PointF& p) { p4_ = p; } | |
41 | |
42 const PointF& p1() const { return p1_; } | |
43 const PointF& p2() const { return p2_; } | |
44 const PointF& p3() const { return p3_; } | |
45 const PointF& p4() const { return p4_; } | |
46 | |
47 // Returns true if the quad is an axis-aligned rectangle. | |
48 bool IsRectilinear() const; | |
49 | |
50 // Returns true if the points of the quad are in counter-clockwise order. This | |
51 // assumes that the quad is convex, and that no three points are collinear. | |
52 bool IsCounterClockwise() const; | |
53 | |
54 // Returns true if the |point| is contained within the quad, or lies on on | |
55 // edge of the quad. | |
56 bool Contains(const gfx::PointF& point) const; | |
57 | |
58 // Returns a rectangle that bounds the four points of the quad. The points of | |
59 // the quad may lie on the right/bottom edge of the resulting rectangle, | |
60 // rather than being strictly inside it. | |
61 RectF BoundingBox() const { | |
62 float rl = std::min(std::min(p1_.x(), p2_.x()), std::min(p3_.x(), p4_.x())); | |
63 float rr = std::max(std::max(p1_.x(), p2_.x()), std::max(p3_.x(), p4_.x())); | |
64 float rt = std::min(std::min(p1_.y(), p2_.y()), std::min(p3_.y(), p4_.y())); | |
65 float rb = std::max(std::max(p1_.y(), p2_.y()), std::max(p3_.y(), p4_.y())); | |
66 return RectF(rl, rt, rr - rl, rb - rt); | |
67 } | |
68 | |
69 // Add a vector to the quad, offseting each point in the quad by the vector. | |
70 void operator+=(const Vector2dF& rhs); | |
71 // Subtract a vector from the quad, offseting each point in the quad by the | |
72 // inverse of the vector. | |
73 void operator-=(const Vector2dF& rhs); | |
74 | |
75 // Scale each point in the quad by the |scale| factor. | |
76 void Scale(float scale) { Scale(scale, scale); } | |
77 | |
78 // Scale each point in the quad by the scale factors along each axis. | |
79 void Scale(float x_scale, float y_scale); | |
80 | |
81 // Returns a string representation of quad. | |
82 std::string ToString() const; | |
83 | |
84 private: | |
85 PointF p1_; | |
86 PointF p2_; | |
87 PointF p3_; | |
88 PointF p4_; | |
89 }; | |
90 | |
91 inline bool operator==(const QuadF& lhs, const QuadF& rhs) { | |
92 return | |
93 lhs.p1() == rhs.p1() && lhs.p2() == rhs.p2() && | |
94 lhs.p3() == rhs.p3() && lhs.p4() == rhs.p4(); | |
95 } | |
96 | |
97 inline bool operator!=(const QuadF& lhs, const QuadF& rhs) { | |
98 return !(lhs == rhs); | |
99 } | |
100 | |
101 // Add a vector to a quad, offseting each point in the quad by the vector. | |
102 GFX_EXPORT QuadF operator+(const QuadF& lhs, const Vector2dF& rhs); | |
103 // Subtract a vector from a quad, offseting each point in the quad by the | |
104 // inverse of the vector. | |
105 GFX_EXPORT QuadF operator-(const QuadF& lhs, const Vector2dF& rhs); | |
106 | |
107 } // namespace gfx | |
108 | |
109 #endif // UI_GFX_QUAD_F_H_ | |
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