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)

if (hasBackdrop) {
      composeSMaskBackdrop(maskData.data, r0, g0, b0);
    }
    composeFn(maskData.data, layerData.data, transferMap);
    maskCtx.putImageData(layerData, 0, row);
  }
}
function composeSMask(ctx, smask, layerCtx) {
  const mask = smask.canvas;
  const maskCtx = smask.context;
  ctx.setTransform(
    smask.scaleX,
    0,
    0,
    smask.scaleY,
    smask.offsetX,
    smask.offsetY
  );
  genericComposeSMask(
    maskCtx,
    layerCtx,
    mask.width,
    mask.height,
    smask.subtype,
    smask.backdrop,
    smask.transferMap
  );
  ctx.drawImage(mask, 0, 0);
}
function getImageSmoothingEnabled(transform, interpolate) {