function Layer(name,host = "user")
{
  this.name = name;
  this.host = host;
  this.element = document.createElement("canvas");
  this.element.setAttribute("id","_"+name);
  this.element.setAttribute("class","layer");

  this.resize = function(rect)
  {
    console.log("Resize "+this.name+" to "+rect.render());

    var pixels_rect   = new Rect(this.element.width+"x"+this.element.height);
    
    this.element.width = rect.width * 2;
    this.element.height = rect.height * 2;
    this.element.style.width = rect.width+"px";
    this.element.style.height = rect.height+"px";

    this.context().scale(2,2);
  }

  this.clear = function()
  {
    this.context().clearRect(0, 0, this.element.width, this.element.height);
  }

  this.context = function()
  {
    return this.element.getContext('2d');
  }

  this.image = function()
  {
    return this.element.toDataURL('image/png');
  }

  this.merge = function()
  {
    console.log(ronin.surface.render_layer);
    var ctx = ronin.surface.render_layer.context();
    var img = new Image();
    img.onload = function(){
      ctx.drawImage(img,10,10);
    };
    img.src = this.element.toDataURL();
  }

  //

  this.widget_cursor = function()
  {
    return "Move";
  }

  this.widget = function()
  {
    return (ronin.surface.active_layer.name == this.name) ? "<span class='highlight'>- ("+this.name+")</span><br />" : "- "+this.name+"<br />";
  }

  this.move_from = null;

  this.mouse_down = function(position)
  {
    this.move_from = ronin.position_in_window(position);
  }
  
  this.mouse_move = function(position)
  {
    if(this.move_from === null){ return; }
    
    position = ronin.position_in_window(position);
    
    var offset_x = this.move_from.x - position.x;
    var offset_y = this.move_from.y - position.y;

    var content = this.context().canvas;

    this.context().globalCompositeOperation = "copy";
    this.context().globalCompositeOperation = "source-over";
    this.context().drawImage(content,-offset_x,-offset_y,ronin.surface.size.width,ronin.surface.size.height);
    
    this.move_from = new Position(position.x,position.y);
  }
  
  this.mouse_up = function(event)
  {
    this.move_from = null;
  }
}