palette

func Apply ¶

func Apply(img draw.Image, p color.Palette)

Apply updates the image to only use colors from the palette. The alpha channel is always left untouched.

If the palette is empty, the image is not modified.

func ApplyN ¶

func ApplyN(img draw.Image, n int)

ApplyN is shorthand for Apply(img, New(img, n)).

func New ¶

func New(img image.Image, n int) color.Palette

New creates a palette of up to n colors from the image. All colors in the palette are fully opaque.

If n < 1, the palette is empty.