Wumpus.Core.Colour

Colour represented as RGB with each component in the range [0..255].

Note - the predefined colours are hidden when importing the top-level shim module Wumpus.Core, import Wumpus.Core.Colour directly to use them.

PostScript has no support for RGB-alpha and hence does not support transparency. Thus Wumpus in turn cannot support transparency.

RGB colour type

data RGBi

Colours levels are in the range [0..255]

Note - this is the format used by SVG, whereas PostScript uses [0..1].

It is more efficient to prefer SVG here.

Constructors

RGBi !Word8 !Word8 !Word8

Instances

Eq RGBi

Ord RGBi

Show RGBi

Format RGBi

Predefined colours

black :: RGBi

Black - 0, 0, 0.

white :: RGBi

White - 255, 255, 255.

red :: RGBi

Red - 255, 0, 0.

green :: RGBi

Green - 0, 255, 0.

blue :: RGBi

Blue - 0, 0, 255.

yellow :: RGBi

Yellow - 255, 255, 0.

cyan :: RGBi

Cyan - 0, 255, 255.

magenta :: RGBi

Magenta - 255, 0, 255.