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# png.coffee

shims/

¶

    RSVP = require 'rsvp'

    module.exports =
      toBase64: ->

¶

Draw the pixels to the canvas

        canvas = document.createElement('canvas')
        canvas.width = @width()
        canvas.height = @height()
        context = canvas.getContext('2d')

        imageData = context.getImageData(0, 0, @width(), @height())
        pixelData = imageData.data

        pixelData[i] = pixel for pixel, i in @pixelData

        context.putImageData(imageData, 0, 0)

        canvas.toDataURL 'image/png'

      toPng: ->
        dataUrl = @toBase64()

¶

Create the image and set the source to the canvas data URL.

        image = new Image()
        image.width = @width()
        image.height = @height()
        image.src = dataUrl

        image

      saveAsPng: ->
        throw "Not available in the browser. Use toPng() instead."

generated Tue May 12 2015 11:08:15 GMT-0400 (EDT)