Data.Colour.RGB

Documentation

data RGB a

An RGB triple for an unspecified colour space.

Constructors

RGB

Fields

• channelRed :: !a
• channelGreen :: !a
• channelBlue :: !a

Instances

Functor RGB

Methods

fmap :: (a -> b) -> RGB a -> RGB b

(<$) :: a -> RGB b -> RGB a

Applicative RGB

Methods

pure :: a -> RGB a

(<*>) :: RGB (a -> b) -> RGB a -> RGB b

(*>) :: RGB a -> RGB b -> RGB b

(<*) :: RGB a -> RGB b -> RGB a

Eq a => Eq (RGB a)

Methods

(==) :: RGB a -> RGB a -> Bool

(/=) :: RGB a -> RGB a -> Bool

Read a => Read (RGB a)

Methods

readsPrec :: Int -> ReadS (RGB a)

readList :: ReadS [RGB a]

readPrec :: ReadPrec (RGB a)

readListPrec :: ReadPrec [RGB a]

Show a => Show (RGB a)

Methods

showsPrec :: Int -> RGB a -> ShowS

show :: RGB a -> String

showList :: [RGB a] -> ShowS

uncurryRGB :: (a -> a -> a -> b) -> RGB a -> b

Uncurries a function expecting three r, g, b parameters.

curryRGB :: (RGB a -> b) -> a -> a -> a -> b

Curries a function expecting one RGB parameter.

data RGBGamut

An RGBGamut is a 3-D colour “cube” that contains all the colours that can be displayed by a RGB device. The “cube” is normalized so that white has luminance 1.

Constructors

RGBGamut

Fields

• primaries :: !(RGB (Chromaticity Rational))
• whitePoint :: !(Chromaticity Rational)

Instances

Eq RGBGamut

Methods

(==) :: RGBGamut -> RGBGamut -> Bool

(/=) :: RGBGamut -> RGBGamut -> Bool

Read RGBGamut

Methods

readsPrec :: Int -> ReadS RGBGamut

readList :: ReadS [RGBGamut]

readPrec :: ReadPrec RGBGamut

readListPrec :: ReadPrec [RGBGamut]

Show RGBGamut

Methods

showsPrec :: Int -> RGBGamut -> ShowS

show :: RGBGamut -> String

showList :: [RGBGamut] -> ShowS

mkRGBGamut

Arguments

:: RGB (Chromaticity Rational)

The three primaries

-> Chromaticity Rational

The white point

-> RGBGamut

An RGB gamut is specified by three primary colours (red, green, and blue) and a white point (often d65).

primaryMatrix :: Fractional a => RGB (Chromaticity a) -> [[a]]

rgb2xyz :: RGBGamut -> [[Rational]]

xyz2rgb :: RGBGamut -> [[Rational]]

hslsv :: (Fractional a, Ord a) => RGB a -> (a, a, a, a, a)

hue :: (Fractional a, Ord a) => RGB a -> a

The hue coordinate of an RGB value is in degrees. Its value is always in the range 0-360.

mod1 :: RealFrac t => t -> t