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Side by Side Diff: ui/gfx/quad_f.h

Issue 109433013: Move geometric types to a separate, more lightweight target. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: . Created 7 years ago
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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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