document.add(p);
document.add(p);
PdfContentByte cb = writer.getDirectContent();
byte maskr[] = {(byte)0x3c, (byte)0x7e, (byte)0xe7, (byte)0xc3, (byte)0xc3, (byte)0xe7, (byte)0x7e, (byte)0x3c};
Image mask = Image.getInstance(8, 8, 1, 1, maskr);
mask.makeMask();
mask.setInverted(true);
Image image = Image.getInstance("otsoe.jpg");
image.setImageMask(mask);
image.setAbsolutePosition(60, 550);
// explicit masking