123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106 |
- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- // Defines a simple integer vector class. This class is used to indicate a
- // distance in two dimensions between two points. Subtracting two points should
- // produce a vector, and adding a vector to a point produces the point at the
- // vector's distance from the original point.
- #ifndef UI_GFX_GEOMETRY_VECTOR2D_H_
- #define UI_GFX_GEOMETRY_VECTOR2D_H_
- #include <stdint.h>
- #include <iosfwd>
- #include <string>
- #include "ui/gfx/geometry/geometry_export.h"
- #include "ui/gfx/geometry/vector2d_f.h"
- namespace gfx {
- class GEOMETRY_EXPORT Vector2d {
- public:
- constexpr Vector2d() : x_(0), y_(0) {}
- constexpr Vector2d(int x, int y) : x_(x), y_(y) {}
- constexpr int x() const { return x_; }
- void set_x(int x) { x_ = x; }
- constexpr int y() const { return y_; }
- void set_y(int y) { y_ = y; }
- // True if both components of the vector are 0.
- bool IsZero() const;
- // Add the components of the |other| vector to the current vector.
- void Add(const Vector2d& other);
- // Subtract the components of the |other| vector from the current vector.
- void Subtract(const Vector2d& other);
- constexpr bool operator==(const Vector2d& other) const {
- return x_ == other.x_ && y_ == other.y_;
- }
- void operator+=(const Vector2d& other) { Add(other); }
- void operator-=(const Vector2d& other) { Subtract(other); }
- void SetToMin(const Vector2d& other) {
- x_ = std::min(x_, other.x_);
- y_ = std::min(y_, other.y_);
- }
- void SetToMax(const Vector2d& other) {
- x_ = std::max(x_, other.x_);
- y_ = std::max(y_, other.y_);
- }
- // Gives the square of the diagonal length of the vector. Since this is
- // cheaper to compute than Length(), it is useful when you want to compare
- // relative lengths of different vectors without needing the actual lengths.
- int64_t LengthSquared() const;
- // Gives the diagonal length of the vector.
- float Length() const;
- void Transpose() {
- using std::swap;
- swap(x_, y_);
- }
- std::string ToString() const;
- operator Vector2dF() const {
- return Vector2dF(static_cast<float>(x()), static_cast<float>(y()));
- }
- private:
- int x_;
- int y_;
- };
- GEOMETRY_EXPORT Vector2d operator-(const Vector2d&);
- inline Vector2d operator+(const Vector2d& lhs, const Vector2d& rhs) {
- Vector2d result = lhs;
- result.Add(rhs);
- return result;
- }
- inline Vector2d operator-(const Vector2d& lhs, const Vector2d& rhs) {
- Vector2d result = lhs;
- result.Subtract(rhs);
- return result;
- }
- inline Vector2d TransposeVector2d(const Vector2d& v) {
- return Vector2d(v.y(), v.x());
- }
- // This is declared here for use in gtest-based unit tests but is defined in
- // the //ui/gfx:test_support target. Depend on that to use this in your unit
- // test. This should not be used in production code - call ToString() instead.
- void PrintTo(const Vector2d& vector, ::std::ostream* os);
- } // namespace gfx
- #endif // UI_GFX_GEOMETRY_VECTOR2D_H_
|