docs: function SpriteFrame (opts) {
      SpriteFrame.superclass.constructor.call(this, opts)
  
      this.texture      = opts.texture
      this.rect         = opts.rect
      this.rotated      = !!opts.rotate
      this.offset       = opts.offset || ccp(0, 0)
      this.originalSize = opts.originalSize || util.copy(this.rect.size)
  }