internal

Documentation

Index

• func Copy(dst draw.Image, src image.Image)
• func NRGBAToRGBA(r, g, b, a uint32) (uint32, uint32, uint32, uint32)
• func NewDrawable(p image.Image) draw.Image
• func NewDrawableSize(p image.Image, r image.Rectangle) draw.Image
• func Parallel(r image.Rectangle, f func(r image.Rectangle))
• func RGBAToNRGBA(r, g, b, a uint32) (uint32, uint32, uint32, uint32)
• type AtFunc
  • func NewAtFunc(p image.Image) AtFunc
• type SetFunc
  • func NewSetFunc(p draw.Image) SetFunc

Functions

func Copy

func Copy(dst draw.Image, src image.Image)

Copy copies src to dst.

func NRGBAToRGBA

func NRGBAToRGBA(r, g, b, a uint32) (uint32, uint32, uint32, uint32)

NRGBAToRGBA converts NRGBA to RGBA.

func NewDrawable

func NewDrawable(p image.Image) draw.Image

NewDrawable returns a new draw.Image with the same type and size as p. If p has no size, 1x1 is used. See NewDrawableSize.

func NewDrawableSize

func NewDrawableSize(p image.Image, r image.Rectangle) draw.Image

NewDrawableSize returns a new draw.Image with the same type as p and the given bounds. If p is not a draw.Image, another type is used.

func Parallel

func Parallel(r image.Rectangle, f func(r image.Rectangle))

Parallel dispatches tasks concurrently for a Rectangle.

func RGBAToNRGBA

func RGBAToNRGBA(r, g, b, a uint32) (uint32, uint32, uint32, uint32)

RGBAToNRGBA converts RGBA to NRGBA.

Types

type AtFunc

type AtFunc func(x, y int) (r, g, b, a uint32)

AtFunc returns a RGBA value of the pixel at (x, y).

func NewAtFunc

func NewAtFunc(p image.Image) AtFunc

NewAtFunc returns an AtFunc for an Image.

type SetFunc

type SetFunc func(x, y int, r, g, b, a uint32)

SetFunc sets a RGBA value to the pixel at (x, y).

func NewSetFunc

func NewSetFunc(p draw.Image) SetFunc

NewSetFunc returns a SetFunc for an Image.