loader.coffee.md

Loader

Loader = ->
  load: (url) ->
    new Promise (resolve, reject) ->
      canvas = document.createElement('canvas')
      context = canvas.getContext('2d')
      image = document.createElement("img")
      image.crossOrigin = true

      image.onload = ->
        {width, height} = image

        canvas.width = width
        canvas.height = height
        context.drawImage(image, 0, 0)
        imageData = context.getImageData(0, 0, width, height)

        resolve imageData

      image.onerror = ->
        reject new Error "Error loading image data"

      image.src = url

module.exports = Loader