combine_two_images_on_appengine.mirah

# too bad appengine doesn't honor png transparency in this case

  def image    
    root = System.getProperty('user.dir')
    

    originalImage = ImagesServiceFactory.makeImage(
      read(root + '/voucher/test.png'))
    c = Composite(ImagesServiceFactory.makeComposite(
      originalImage, 0, 0, 1, Composite.Anchor.TOP_LEFT))
      
    #List<Composite> myComposites = new ArrayList<Composite>(); 
    
    watermarkImage = ImagesServiceFactory.makeImage(
      read(root + '/voucher/over_500.png'))
    watermark = ImagesServiceFactory.makeComposite(
      watermarkImage, 0, 0, 1, Composite.Anchor.BOTTOM_CENTER)
      
    myComposites = ArrayList.new()    
    myComposites.add(c); 
    myComposites.add(watermark)
    
    background = Long.parseLong('ffffffff', 16)
    imageWithWatermark = ImagesServiceFactory.getImagesService().
      composite(
        myComposites, 
        originalImage.getWidth(), 
        originalImage.getHeight(), 
        background
      )
    puts imageWithWatermark.getImageData()
    #puts imageWithWatermark.getImageData().getClass.getName
    
    params.response.setContentType('image/png;')
    
    params.respond(imageWithWatermark.getImageData())
  end  
  
    
  def read(path:String)
    file = File.new(path)
    fin = FileInputStream.new(file)
    fileContent = byte[int(file.length())]
    fin.read(fileContent) 
    fileContent 
  end