// FIXME: Manage Exceptions
private OutputStream marcarReporteProgramaRechazado(final Programa programa, InputStream src)
throws IOException, DocumentException {
PdfReader reader = null;
reader = new PdfReader(src);
int n = reader.getNumberOfPages();
ByteArrayOutputStream os = new ByteArrayOutputStream();
PdfStamper stamper = null;
stamper = new PdfStamper(reader, os);
// text watermark
Font f = new Font(Font.FontFamily.HELVETICA, 65);
Phrase p = new Phrase("RECHAZADO", f);
// transparency
PdfGState gs1 = new PdfGState();
gs1.setFillOpacity(0.3f);
// properties
PdfContentByte over;
Rectangle pagesize;
float x, y;
// loop over every page
for (int i = 1; i <= n; i++) {
pagesize = reader.getPageSizeWithRotation(i);
x = (pagesize.getLeft() + pagesize.getRight()) / 2;
y = (pagesize.getTop() + pagesize.getBottom()) / 2;
over = stamper.getOverContent(i);
over.saveState();
over.setGState(gs1);
ColumnText.showTextAligned(over, Element.ALIGN_CENTER, p, x, y, 45);
}
stamper.close();
reader.close();
return os;
}