In the end I wrote my own method to do it.
private void PlaceChunck(String text, int x, int y) {
PdfContentByte cb = writer.DirectContent;
BaseFont bf = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
cb.SaveState();
cb.BeginText();
cb.MoveText(x, y);
cb.SetFontAndSize(bf, 12);
cb.ShowText(text);
cb.EndText();
cb.RestoreState();
}
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…