y1[i] = y2[i - 1] - 20f;
y2[i] = y1[i] - height;
}
// we create a reader for a certain document
PdfReader reader = new PdfReader(src.getAbsolutePath());
// we retrieve the total number of pages
int n = reader.getNumberOfPages();
System.out.println("There are " + n + " pages in the original file.");
// step 1: creation of a document-object
Document document = new Document(PageSize.A4);
// step 2: we create a writer that listens to the document
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));
// step 3: we open the document
document.open();
PdfContentByte cb = writer.getDirectContent();
PdfImportedPage page;
int rotation;
int i = 0;
int p = 0;
// step 4: we add content
while (i < n) {
i++;
Rectangle rect = reader.getPageSizeWithRotation(i);
float factorx = (x2 - x1) / rect.width();
float factory = (y1[p] - y2[p]) / rect.height();
float factor = (factorx < factory ? factorx : factory);
float dx = (factorx == factor ? 0f : ((x2 - x1) - rect.width() * factor) / 2f);
float dy = (factory == factor ? 0f : ((y1[p] - y2[p]) - rect.height() * factor) / 2f);
page = writer.getImportedPage(reader, i);
rotation = reader.getPageRotation(i);
if (rotation == 90 || rotation == 270) {
cb.addTemplate(page, 0, -factor, factor, 0, x1 + dx, y2[p] + dy + rect.height() * factor);
}
else {
cb.addTemplate(page, factor, 0, 0, factor, x1 + dx, y2[p] + dy);