/// <summary>
/// Gets the image entries to be written to the file
/// </summary>
/// <returns></returns>
internal byte[] GetImageDict(long filePos, out int size)
{
MemoryStream ms = new MemoryStream();
int s;
byte[] ba;
foreach (PdfImageEntry ie in images.Values)
{
ObjectList objList = new ObjectList(ie.objectNum, filePos);
ba = PdfUtility.GetUTF8Bytes(ie.imgDict, out s);
ms.Write(ba, 0, ba.Length);
filePos += s;
ms.Write(ie.ba, 0, ie.ba.Length); // write out the image
filePos += ie.ba.Length;
ba = PdfUtility.GetUTF8Bytes("endstream\r\nendobj\r\n", out s);
ms.Write(ba, 0, ba.Length);
filePos += s;
ie.xref.offsets.Add(objList);
}
ba = ms.ToArray();
size = ba.Length;
return(ba);
}
/// <summary>
/// Content object
/// </summary>
/// <summary>
/// Get the Content Dictionary
/// </summary>
internal byte[] GetContentDict(long filePos, out int size)
{
// When no compression
if (!CanCompress)
{
content = string.Format("\r\n{0} 0 obj<</Length {1}>>stream\r{2}\rendstream\rendobj\r",
this.objectNum, contentStream.Length, contentStream);
return(GetUTF8Bytes(content, filePos, out size));
}
// Try to use compression; could still fail in which case fall back to uncompressed
Stream strm = null;
MemoryStream cs = null;
try
{
CompressionConfig cc = RdlEngineConfig.GetCompression();
cs = new MemoryStream(); // this will contain the content stream
if (cc != null)
{
strm = cc.GetStream(cs);
}
if (strm == null)
{ // can't compress string
cs.Close();
content = string.Format("\r\n{0} 0 obj<</Length {1}>>stream\r{2}\rendstream\rendobj\r",
this.objectNum, contentStream.Length, contentStream);
return(GetUTF8Bytes(content, filePos, out size));
}
// Compress the contents
int cssize;
byte[] ca = PdfUtility.GetUTF8Bytes(contentStream, out cssize);
strm.Write(ca, 0, cssize);
strm.Flush();
cc.CallStreamFinish(strm);
// Now output the PDF command
MemoryStream ms = new MemoryStream();
int s;
byte[] ba;
// get the compressed data; we need the lenght now
byte[] cmpData = cc.GetArray(cs);
// write the beginning portion of the PDF object
string ws = string.Format("\r\n{0} 0 obj<< /Filter /FlateDecode /Length {1}>>stream\r",
this.objectNum, cmpData.Length);
ba = GetUTF8Bytes(ws, filePos, out s); // this will also register the object
ms.Write(ba, 0, ba.Length);
filePos += s;
// write the Compressed data
ms.Write(cmpData, 0, cmpData.Length);
filePos += ba.Length;
// write the end portion of the PDF object
ba = PdfUtility.GetUTF8Bytes("\rendstream\rendobj\r", out s);
ms.Write(ba, 0, ba.Length);
filePos += s;
// now the final output array
ba = ms.ToArray();
size = ba.Length;
return(ba);
}
finally
{
if (strm != null)
{
strm.Close();
}
}
}
