ByteBuffer class has a public static variable named
HIGH_PRECISION. By default, it is set to
false. You can set it to
true so that you get 6 decimal places when rounding a number:
iTextSharp.text.pdf.ByteBuffer.HIGH_PRECISION = true;
That will cost you some performance (but maybe you'll hardly notice that) and the resulting file will have more bytes (but measurements will be more accurate).