Image type

exercise8.go

package main

import (
    "code.google.com/p/go-tour/pic"
    "image"
    "image/color"
)

type Image struct{
	Height, Width int
}

func (m Image) ColorModel() color.Model {
	return color.RGBAModel    
}

func (m Image) Bounds() image.Rectangle {
	return image.Rect(0, 0, m.Height, m.Width)
}

func (m Image) At(x, y int) color.Color {
	c := uint8((x + y) / 2)
	return color.RGBA{c, c, 255, 255}
}

func main() {
    m := Image{256, 256}
    pic.ShowImage(m)
}