Images

The image package defines the Image interface:

package image

type Image interface {
	ColorModel() color.Model
	Bounds() Rectangle
	At(x, y int) color.Color
}

Implement those three methods on your type and it’s a valid image.Image — compatible with the entire standard library’s imaging toolchain.

Note: Rectangle here is image.Rectangle (the declaration is inside the image package). color.Color and color.Model are also interfaces, but you can use the concrete color.RGBA and color.RGBAModel and not worry about that.

Try it: this example creates a real image.RGBA and prints its bounds and pixel color.