tt::color Class Reference

#include <ttauri/color/color.hpp>

Public Member Functions
constexpr	color (color const &) noexcept=default
constexpr	color (color &&) noexcept=default
constexpr color &	operator= (color const &) noexcept=default
constexpr color &	operator= (color &&) noexcept=default
constexpr	color (f32x4 other) noexcept
constexpr	operator f32x4 () const noexcept
constexpr	color (float r, float g, float b, float a=1.0) noexcept
constexpr	color (double r, double g, double b, double a=1.0) noexcept
constexpr float &	r () noexcept
constexpr float &	g () noexcept
constexpr float &	b () noexcept
constexpr float &	a () noexcept
constexpr float const &	r () const noexcept
constexpr float const &	g () const noexcept
constexpr float const &	b () const noexcept
constexpr float const &	a () const noexcept
constexpr bool	is_valid () const noexcept

Static Public Member Functions
static constexpr color	transparent () noexcept
static constexpr color	white () noexcept
static constexpr color	black () noexcept

Friends
constexpr friend bool	operator== (color const &lhs, color const &rhs) noexcept
constexpr friend color	operator* (color const &lhs, color const &rhs) noexcept
constexpr friend color	composit (color const &lhs, color const &rhs) noexcept
constexpr friend color	pre_multiply_alpha (color const &rhs) noexcept

Detailed Description

This is a RGBA floating point color.

The color can be converted between different color spaces using the matrix-class.

But in most cases in the application and ttauri library this color would be in the tsRGBA color space. This color space is compatible with the sRGB standard IEC 61966-2-1:1999.

tsRGB details:

• the ITU-R BT.709 color primaries.
• A linear transfer function (unlike sRGB).
• R=0.0, G=0.0, B=0.0: Black
• R=1.0, G=1.0, B=1.0: White D65 at 80 nits (80 cd/m^2).
• RGB values above 1.0 are allowed for HDR (high dynamic range)
• RGB values below 0.0 are allowed for WCG (wide color gamut)

tsRGBA details:

• Includes an alpha value
• Alpha values are linear and must be between 0.0 through 1.0.
• A=0.0 fully transparent
• A=1.0 fully opaque

This color format is inspired by scRGB, however scRGB only describes a 12- or 16-bit integer per component encoding of RGB values between -0.5 and 7.5.

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The documentation for this class was generated from the following file:

• hikogui/src/ttauri/color/color.hpp