text: /**
   * CircleBrush class
   * @class fabric.CircleBrush
   */
  fabric.CircleBrush = fabric.util.createClass(fabric.BaseBrush, /** @lends fabric.CircleBrush.prototype */ {
  
    /**
     * Width of a brush
     * @type Number
     * @default
     */
    width: 10,
  
    /**
     * Constructor
     * @param {fabric.Canvas} canvas
     * @return {fabric.CircleBrush} Instance of a circle brush
     */
    initialize: function(canvas) {
      this.canvas = canvas;
      this.points = [];
    },
  
    /**
     * Invoked inside on mouse down and mouse move
     * @param {Object} pointer
     */
    drawDot: function(pointer) {
      var point = this.addPoint(pointer),
          ctx = this.canvas.contextTop;
      this._saveAndTransform(ctx);
      this.dot(ctx, point);
      ctx.restore();
    },
  
    dot: function(ctx, point) {
      ctx.fillStyle = point.fill;
      ctx.beginPath();
      ctx.arc(point.x, point.y, point.radius, 0, Math.PI * 2, false);
      ctx.closePath();
      ctx.fill();
    },
  
    /**
     * Invoked on mouse down
     */
    onMouseDown: function(pointer) {
      this.points.length = 0;
      this.canvas.clearContext(this.canvas.contextTop);
      this._setShadow();
      this.drawDot(pointer);
    },
  
    /**
     * Render the full state of the brush
     * @private
     */
    _render: function() {
      var ctx  = this.canvas.contextTop, i, len,
          points = this.points;
      this._saveAndTransform(ctx);
      for (i = 0, len = points.length; i < len; i++) {
        this.dot(ctx, points[i]);
      }
      ctx.restore();
    },
  
    /**
     * Invoked on mouse move
     * @param {Object} pointer
     */
    onMouseMove: function(pointer) {
      if (this.limitedToCanvasSize === true && this._isOutSideCanvas(pointer)) {
        return;
      }
      if (this.needsFullRender()) {
        this.canvas.clearContext(this.canvas.contextTop);
        this.addPoint(pointer);
        this._render();
      }
      else {
        this.drawDot(pointer);
      }
    },
  
    /**
     * Invoked on mouse up
     */
    onMouseUp: function() {
      var originalRenderOnAddRemove = this.canvas.renderOnAddRemove, i, len;
      this.canvas.renderOnAddRemove = false;
  
      var circles = [];
  
      for (i = 0, len = this.points.length; i < len; i++) {
        var point = this.points[i],
            circle = new fabric.Circle({
              radius: point.radius,
              left: point.x,
              top: point.y,
              originX: 'center',
              originY: 'center',
              fill: point.fill
            });
  
        this.shadow && (circle.shadow = new fabric.Shadow(this.shadow));
  
        circles.push(circle);
      }
      var group = new fabric.Group(circles);
      group.canvas = this.canvas;
  
      this.canvas.fire('before:path:created', { path: group });
      this.canvas.add(group);
      this.canvas.fire('path:created', { path: group });
  
      this.canvas.clearContext(this.canvas.contextTop);
      this._resetShadow();
      this.canvas.renderOnAddRemove = originalRenderOnAddRemove;
      this.canvas.requestRenderAll();
    },
  
    /**
     * @param {Object} pointer
     * @return {fabric.Point} Just added pointer point
     */
    addPoint: function(pointer) {
      var pointerPoint = new fabric.Point(pointer.x, pointer.y),
  
          circleRadius = fabric.util.getRandomInt(
            Math.max(0, this.width - 20), this.width + 20) / 2,
  
          circleColor = new fabric.Color(this.color)
            .setAlpha(fabric.util.getRandomInt(0, 100) / 100)
            .toRgba();
  
      pointerPoint.radius = circleRadius;
      pointerPoint.fill = circleColor;
  
      this.points.push(pointerPoint);
  
      return pointerPoint;
    }
  });
  