comparison: src/colors.h
src/colors.h
- changeset 250
- 2837b549e616
- parent 206
- 654661eab7f3
- child 264
- 76a025db4948
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| 249:37d3c819cafa | 250:2837b549e616 |
|---|---|
| 80 //! @brief Calculates the luma-value for the given color. | 80 //! @brief Calculates the luma-value for the given color. |
| 81 //! @details c.f. https://en.wikipedia.org/wiki/Luma_(video) | 81 //! @details c.f. https://en.wikipedia.org/wiki/Luma_(video) |
| 82 template<typename T> | 82 template<typename T> |
| 83 constexpr T luma(T r, T g, T b) | 83 constexpr T luma(T r, T g, T b) |
| 84 { | 84 { |
| 85 return 0.2126 * r + 0.7152 * g + 0.0722 * b; | 85 return static_cast<T>(0.2126 * r + 0.7152 * g + 0.0722 * b); |
| 86 } | 86 } |
| 87 | 87 |
| 88 //! @brief Checks whether or not the specified color index is a direct color | 88 //! @brief Checks whether or not the specified color index is a direct color |
| 89 constexpr bool isDirectColor(ColorIndex color) | 89 constexpr bool isDirectColor(ColorIndex color) |
| 90 { | 90 { |
