internal override void pdfWriteToDocument(PdfDocumentWriter document, PdfStreamWriter writer)
{
writer.WriteDictionaryBegin();
{
writer.WriteName("Type");
writer.WriteName("XObject");
writer.WriteName("Subtype");
writer.WriteName("Image");
writer.WriteName("Width");
writer.WriteInteger(_width);
writer.WriteName("Height");
writer.WriteInteger(_height);
writer.WriteName("ColorSpace");
writer.WriteName("DeviceRGB");
writer.WriteName("BitsPerComponent");
writer.WriteInteger(_bitsPerComponent);
writer.WriteName("Filter");
writer.WriteName("DCTDecode");
writer.WriteName("Interpolate");
writer.WriteBoolean(true);
writer.WriteName("Length");
writer.WriteInteger(_imageDataLength);
}
writer.WriteDictionaryEnd();
writer.WriteStream(_imageData, _imageDataLength);
}
private void _writeContent(PdfStreamWriter writer, string filter, StreamBuffer buffer)
{
writer.WriteDictionaryBegin();
if (filter != null)
{
writer.WriteName("Filter");
writer.WriteName(filter);
}
writer.WriteName("Length");
writer.WriteInteger((int)buffer.Length);
writer.WriteDictionaryEnd();
writer.WriteStream(buffer.GetBuffer(), (int)buffer.Length);
_dataStream.Dispose();
_dataStream = null; // Release datastream for less memory usage
}
private void _writeTrailer()
{
using (var compressStream = new StreamBuffer()) {
var posXrefTable = _writer.PdfPosition;
var objref = new PdfWriterReference(_xrefTable.Count)
{
Position = _writer.PdfPosition
};
_xrefTable.Add(objref);
string filter = "FlateDecode";
using (var compressWriter = PdfFilter.GetCompressor(filter, compressStream)) {
byte[] buf = new byte[6];
for (int i = 0; i < _xrefTable.Count; ++i)
{
var e = _xrefTable[i];
if (e != null)
{
if (e.CompressedObjId > 0)
{
buf[0] = 2;
buf[1] = (byte)(e.CompressedObjId >> 24);
buf[2] = (byte)(e.CompressedObjId >> 16);
buf[3] = (byte)(e.CompressedObjId >> 8);
buf[4] = (byte)(e.CompressedObjId);
buf[5] = (byte)(e.Position);
}
else
{
buf[0] = 1;
buf[1] = (byte)(e.Position >> 24);
buf[2] = (byte)(e.Position >> 16);
buf[3] = (byte)(e.Position >> 8);
buf[4] = (byte)(e.Position);
buf[5] = 0;
}
}
else
{
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
buf[4] = 0;
buf[5] = 255;
}
compressWriter.Write(buf, 0, buf.Length);
}
}
_writer.WriteInteger(objref.Id);
_writer.WriteInteger(0);
_writer.WriteObjBegin();
_writer.WriteDictionaryBegin();
_writer.WriteName("Type");
_writer.WriteName("XRef");
_writer.WriteName("W");
_writer.WriteArrayBegin();
_writer.WriteInteger(1);
_writer.WriteInteger(4);
_writer.WriteInteger(1);
_writer.WriteArrayEnd();
_writer.WriteName("Index");
_writer.WriteArrayBegin();
_writer.WriteInteger(0);
_writer.WriteInteger(_xrefTable.Count);
_writer.WriteArrayEnd();
_writer.WriteName("Size");
_writer.WriteInteger(_xrefTable.Count);
_writer.WriteName("Root");
_writer.WriteReference(GetReference(_catalog));
_writer.WriteName("Info");
_writer.WriteReference(GetReference(_documentInfo));
_writer.WriteName("ID");
_writer.WriteArrayBegin();
_writer.WriteStringHex(System.Guid.NewGuid().ToByteArray());
_writer.WriteStringHex(System.Guid.NewGuid().ToByteArray());
_writer.WriteArrayEnd();
_writer.WriteName("Filter");
_writer.WriteName(filter);
_writer.WriteName("Length");
_writer.WriteInteger((int)(compressStream.Length));
_writer.WriteDictionaryEnd();
_writer.WriteStream(compressStream.GetBuffer(), (int)(compressStream.Length));
_writer.WriteObjEnd();
_writer.WriteNewLine();
_writer.WriteEOF(posXrefTable);
}
}
