Data.Colour.SRGB

Specifies Colours in accordance with the sRGB standard.

Documentation

data Colour a

This type represents the human preception of colour. The a parameter is a numeric type used internally for the representation.

The Monoid instance allows one to add colours, but beware that adding colours can take you out of gamut. Consider using blend whenever possible.

Instances

ColourOps Colour

Defined in Data.Colour.Internal

Methods

over :: Num a => AlphaColour a -> Colour a -> Colour a

darken :: Num a => a -> Colour a -> Colour a

AffineSpace Colour

Defined in Data.Colour.Internal

Methods

affineCombo :: Num a => [(a, Colour a)] -> Colour a -> Colour a

Eq a => Eq (Colour a)

Defined in Data.Colour.Internal

Methods

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

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

(Fractional a, Read a) => Read (Colour a)

Defined in Data.Colour

Methods

readsPrec :: Int -> ReadS (Colour a)

readList :: ReadS [Colour a]

readPrec :: ReadPrec (Colour a)

readListPrec :: ReadPrec [Colour a]

(Fractional a, Show a) => Show (Colour a)

Defined in Data.Colour

Methods

showsPrec :: Int -> Colour a -> ShowS

show :: Colour a -> String

showList :: [Colour a] -> ShowS

Num a => Semigroup (Colour a)

Defined in Data.Colour.Internal

Methods

(<>) :: Colour a -> Colour a -> Colour a

sconcat :: NonEmpty (Colour a) -> Colour a

stimes :: Integral b => b -> Colour a -> Colour a

Num a => Monoid (Colour a)

Defined in Data.Colour.Internal

Methods

mempty :: Colour a

mappend :: Colour a -> Colour a -> Colour a

mconcat :: [Colour a] -> Colour a

data RGB a

An RGB triple for an unspecified colour space.

Constructors

RGB

Fields

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

Instances

Functor RGB

Defined in Data.Colour.RGB

Methods

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

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

Applicative RGB

Defined in Data.Colour.RGB

Methods

pure :: a -> RGB a

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

liftA2 :: (a -> b -> c) -> RGB a -> RGB b -> RGB c

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

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

Eq a => Eq (RGB a)

Defined in Data.Colour.RGB

Methods

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

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

Read a => Read (RGB a)

Defined in Data.Colour.RGB

Methods

readsPrec :: Int -> ReadS (RGB a)

readList :: ReadS [RGB a]

readPrec :: ReadPrec (RGB a)

readListPrec :: ReadPrec [RGB a]

Show a => Show (RGB a)

Defined in Data.Colour.RGB

Methods

showsPrec :: Int -> RGB a -> ShowS

show :: RGB a -> String

showList :: [RGB a] -> ShowS

sRGB24 :: (Ord b, Floating b) => Word8 -> Word8 -> Word8 -> Colour b

Construct a colour from a 24-bit (three 8-bit words) sRGB specification.

sRGBBounded :: (Ord b, Floating b, Integral a, Bounded a) => a -> a -> a -> Colour b

Construct a colour from an sRGB specification. Input components are expected to be in the range [0..maxBound].

sRGB :: (Ord b, Floating b) => b -> b -> b -> Colour b

Construct a colour from an sRGB specification. Input components are expected to be in the range [0..1].

toSRGB24 :: (RealFrac b, Floating b) => Colour b -> RGB Word8

Return the approximate 24-bit sRGB colour components as three 8-bit components. Out of range values are clamped.

toSRGBBounded :: (RealFrac b, Floating b, Integral a, Bounded a) => Colour b -> RGB a

Return the approximate sRGB colour components in the range [0..maxBound]. Out of range values are clamped.

toSRGB :: (Ord b, Floating b) => Colour b -> RGB b

Return the sRGB colour components in the range [0..1].

sRGB24shows :: (RealFrac b, Floating b) => Colour b -> ShowS

Show a colour in hexadecimal form, e.g. "#00aaff"

sRGB24show :: (RealFrac b, Floating b) => Colour b -> String

Show a colour in hexadecimal form, e.g. "#00aaff"

sRGB24reads :: (Ord b, Floating b) => ReadS (Colour b)

Read a colour in hexadecimal form, e.g. "#00aaff" or "00aaff"

sRGB24read :: (Ord b, Floating b) => String -> Colour b

Read a colour in hexadecimal form, e.g. "#00aaff" or "00aaff"

sRGBSpace :: (Ord a, Floating a) => RGBSpace a

The sRGB colour space