function r\u016Btis( context )
{
  this.init( context );
}

r\u016Btis.prototype =
{
  context: null,

  init: function( context )
  {
    this.context = context;

    if (RegExp(" AppleWebKit/").test(navigator.userAgent))
      this.context.globalCompositeOperation = 'darker';
  },

  destroy: function()
  {
  },

  strokeStart: function( mouseX, mouseY )
  {
  },

  stroke: function( mouseX, mouseY )
  {
    var i, cx, cy, dx, dy;

    cx = Math.round(mouseX / 100) * 100;
    cy = Math.round(mouseY / 100) * 100;

    dx = (cx - mouseX) * 10;
    dy = (cy - mouseY) * 10;

    this.context.lineWidth = BRUSH_SIZE;
    this.context.strokeStyle = "rgba(" + COLOR[0] + ", " + COLOR[1] + ", " + COLOR[2] + ", " + 0.01 * BRUSH_PRESSURE + ")";

    for (i = 0; i < 50; i++)
    {
      this.context.beginPath();
      this.context.moveTo( cx, cy );
      this.context.quadraticCurveTo(mouseX + Math.random() * dx, mouseY + Math.random() * dy, cx, cy);
      this.context.stroke();
    }
  },

  strokeEnd: function()
  {

  }
}