BitmapImage fopimg = new BitmapImage("TempImageMask:"
+ img.toString(), buf.getWidth(),
buf.getHeight(), mask, null);
fopimg.setColorSpace(new PDFDeviceColorSpace(PDFDeviceColorSpace.DEVICE_GRAY));
PDFXObject xobj = pdfDoc.addImage(resourceContext, fopimg);
ref = xobj.referencePDF();
if (outputStream != null) {
try {
this.pdfDoc.output(outputStream);
} catch (IOException ioe) {