hello,
this pdf file created with Adobe InDesign, alot of elements are missing, also wrong color are displaying:
http://tal-ram.co.il/images/products/orders/14265798291.pdf

![viewer](https://cloud.githubusercontent.com/assets/1198143/6713275/f88ae242-cd99-11e4-8202-fdb5dc4b132e.png)

![org](https://cloud.githubusercontent.com/assets/1198143/6713312/24d83ff2-cd9a-11e4-82e7-647ad5440a64.png)

const length = maskData.length;
  const scale = 1 / 255;
  for (let i = 3; i < length; i += 4) {
    const alpha = transferMap ? transferMap[maskData[i]] : maskData[i];
    layerData[i] = (layerData[i] * alpha * scale) | 0;
  }
}
function composeSMaskLuminosity(maskData, layerData, transferMap) {
  const length = maskData.length;
  for (let i = 3; i < length; i += 4) {
    const y =
      maskData[i - 3] * 77 + 
      maskData[i - 2] * 152 + 
      maskData[i - 1] * 28; 
    layerData[i] = transferMap
      ? (layerData[i] * transferMap[y >> 8]) >> 8
      : (layerData[i] * y) >> 16;
  }
}
function genericComposeSMask(