Take screenshots with Phantom.js from Node.js

phantom.coffee

#!/usr/bin/env coffee

# Call the program with: coffee phantom.coffee http://url.to/screengrab

phantom = require 'phantom' # npm install phantom
child_process = require 'child_process'

url = process.argv[2]

createScreenshot = (page, filename) ->
  page.render filename, ->
    child_process.exec "open #{filename}"
    process.exit()

phantom.create (ph) ->
  ph.createPage (page) ->
    page.set 'viewportSize', width: 1000, height: 1000
    page.set 'clipRect', top: 0, left: 0, width: 1000, height: 1000
    console.log "Opening #{url} ..."
    page.open url, (status) ->
      console.log "Rendering screenshot ..."
      setTimeout (-> createScreenshot(page, 'output.png')), 1000

Nice. I had the same code, I added your sets for viewPortSize and a few other things.(sharing of a single Phantom instance)
https://gist.github.com/Rayjax/b793c561a54518bff845
Both JavaScript and Coffee versions