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package main
import (
"os"
"github.com/ajstarks/svgo"
)
var canvas = svg.New(os.Stdout)
func main() {
width := 512
height := 512
n := 1024
rowsize := 32
diameter := 16
var value int
var source string
if len(os.Args) > 1 {
source = os.Args[1]
} else {
source = "/dev/urandom"
}
f, _ := os.Open(source)
mem := make([]byte, n)
f.Read(mem)
f.Close()
canvas.Start(width, height)
canvas.Title("Visualize Files")
canvas.Rect(0, 0, width, height, "fill:white")
dx := diameter / 2
dy := diameter / 2
canvas.Gstyle("fill-opacity:1.0")
for i := 0; i < n; i++ {
value = int(mem[i])
if i%rowsize == 0 && i != 0 {
dx = diameter / 2
dy += diameter
}
canvas.Circle(dx, dy, diameter/2, canvas.RGB(value, value, value))
dx += diameter
}
canvas.Gend()
canvas.End()
}
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