/** Creates new PdfStamperImp.
* @param reader the read PDF
* @param os the output destination
* @param pdfVersion the new pdf version or '\0' to keep the same version as the original
* document
* @param append
* @throws DocumentException on error
* @throws IOException
*/
internal PdfStamperImp(PdfReader reader, Stream os, char pdfVersion, bool append)
: base(new PdfDocument(), os)
{
if (!reader.IsOpenedWithFullPermissions)
throw new BadPasswordException("PdfReader not opened with owner password");
if (reader.Tampered)
throw new DocumentException("The original document was reused. Read it again from file.");
reader.Tampered = true;
this.reader = reader;
file = reader.SafeFile;
this.append = append;
if (append) {
if (reader.IsRebuilt())
throw new DocumentException("Append mode requires a document without errors even if recovery was possible.");
if (reader.IsEncrypted())
crypto = new PdfEncryption(reader.Decrypt);
pdf_version.SetAppendmode(true);
file.ReOpen();
byte[] buf = new byte[8192];
int n;
while ((n = file.Read(buf)) > 0)
this.os.Write(buf, 0, n);
file.Close();
prevxref = reader.LastXref;
reader.Appendable = true;
}
else {
if (pdfVersion == 0)
base.PdfVersion = reader.PdfVersion;
else
base.PdfVersion = pdfVersion;
}
base.Open();
pdf.AddWriter(this);
if (append) {
body.Refnum = reader.XrefSize;
marked = new IntHashtable();
if (reader.IsNewXrefType())
fullCompression = true;
if (reader.IsHybridXref())
fullCompression = false;
}
initialXrefSize = reader.XrefSize;
}