Tour of Go Image

image.go

package main

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

const DIM = 1024

func Red(i, j int) uint8 {
	var v int
	if i != 0 && j != 0 {
		v = (i % j) & (j % i)
	} else {
		v = 0
	}
	return uint8(v)
}

func Green(i, j int) uint8 {
	var v int
	if i != 0 && j != 0 {
		v = (i % j) + (j % i)
	} else {
		v = 0
	}
	return uint8(v)
}

func Blue(i, j int) uint8 {
	var v int
	if i != 0 && j != 0 {
		v = (i % j) | (j % i)
	} else {
		v = 0
	}
	return uint8(v)
}

type Image struct{}

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

func (i *Image) Bounds() image.Rectangle {
	return image.Rect(0, 0, DIM, DIM)
}

func (img *Image) At(i, j int) color.Color {
	return color.RGBA{Red(i, j), Green(i, j), Blue(i, j), 255}
}

func main() {
	m := Image{}
	var img image.Image
	img = &m
	pic.ShowImage(img)
}