1  // Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
 2  // Licensed under GPLv2 or any later version
 3  // Refer to the license.txt file included.
 4  
 5  #pragma once
 6  
 7  #include <cstdlib>
 8  #include <type_traits>
 9  
10  namespace Common {
11  
12  constexpr float PI = 3.14159265f;
13  
14  template <class T>
15  struct Rectangle {
16      T left{};
17      T top{};
18      T right{};
19      T bottom{};
20  
21      constexpr Rectangle() = default;
22  
23      constexpr Rectangle(T left, T top, T right, T bottom)
24          : left(left), top(top), right(right), bottom(bottom) {}
25  
26      [[nodiscard]] constexpr bool operator==(const Rectangle<T>& rhs) const {
27          return (left == rhs.left) && (top == rhs.top) && (right == rhs.right) &&
28                 (bottom == rhs.bottom);
29      }
30  
31      [[nodiscard]] constexpr bool operator!=(const Rectangle<T>& rhs) const {
32          return !operator==(rhs);
33      }
34  
35      [[nodiscard]] constexpr Rectangle<T> operator*(const T value) const {
36          return Rectangle{left * value, top * value, right * value, bottom * value};
37      }
38      [[nodiscard]] constexpr Rectangle<T> operator/(const T value) const {
39          return Rectangle{left / value, top / value, right / value, bottom / value};
40      }
41  
42      [[nodiscard]] T GetWidth() const {
43          return std::abs(static_cast<std::make_signed_t<T>>(right - left));
44      }
45      [[nodiscard]] T GetHeight() const {
46          return std::abs(static_cast<std::make_signed_t<T>>(bottom - top));
47      }
48      [[nodiscard]] Rectangle<T> TranslateX(const T x) const {
49          return Rectangle{left + x, top, right + x, bottom};
50      }
51      [[nodiscard]] Rectangle<T> TranslateY(const T y) const {
52          return Rectangle{left, top + y, right, bottom + y};
53      }
54      [[nodiscard]] Rectangle<T> Scale(const float s) const {
55          return Rectangle{left, top, static_cast<T>(left + GetWidth() * s),
56                           static_cast<T>(top + GetHeight() * s)};
57      }
58  };
59  
60  template <typename T>
61  Rectangle(T, T, T, T) -> Rectangle<T>;
62  
63  } // namespace Common