player/js/elements/canvasElements/CVCompElement.js

function CVCompElement(data, globalData, comp) {
  this.completeLayers = false;
  this.layers = data.layers;
  this.pendingElements = [];
  this.elements = createSizedArray(this.layers.length);
  this.initElement(data, globalData, comp);
  this.tm = data.tm ? PropertyFactory.getProp(this, data.tm, 0, globalData.frameRate, this) : { _placeholder: true };
}

extendPrototype([CanvasRenderer, ICompElement, CVBaseElement], CVCompElement);

CVCompElement.prototype.renderInnerContent = function () {
  var ctx = this.canvasContext;
  ctx.beginPath();
  ctx.moveTo(0, 0);
  ctx.lineTo(this.data.w, 0);
  ctx.lineTo(this.data.w, this.data.h);
  ctx.lineTo(0, this.data.h);
  ctx.lineTo(0, 0);
  ctx.clip();
  var i, len = this.layers.length;
  for (i = len - 1; i >= 0; i -= 1) {
    if (this.completeLayers || this.elements[i]) {
      this.elements[i].renderFrame();
    }
  }
};

CVCompElement.prototype.destroy = function () {
  var i, len = this.layers.length;
  for (i = len - 1; i >= 0; i -= 1) {
    if (this.elements[i]) {
      this.elements[i].destroy();
    }
  }
  this.layers = null;
  this.elements = null;
};