/// <summary>
/// Creates the xref table using the byte offsets in the array.
/// </summary>
/// <returns></returns>
internal byte[] CreateXrefTable(long fileOffset, out int size)
{
//Store the Offset of the Xref table for startxRef
string table = null;
try
{
ObjectList objList = new ObjectList(0, fileOffset);
pa.offsets.Add(objList);
pa.offsets.Sort();
numTableEntries = (int)pa.offsets.Count;
table = string.Format("\r\nxref {0} {1}\r\n0000000000 65535 f\r\n", 0, numTableEntries);
for (int entries = 1; entries < numTableEntries; entries++)
{
ObjectList obj = pa.offsets[entries];
table += obj.offset.ToString().PadLeft(10, '0');
table += " 00000 n\r\n";
}
}
catch (Exception e)
{
Exception error = new Exception(e.Message + " In Utility.CreateXrefTable()");
throw error;
}
return GetUTF8Bytes(table, out size);
}
/// <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>
/// Convert the unicode string 16 bits to unicode bytes.
/// This is written to the file to create Pdf
/// </summary>
/// <returns></returns>
internal byte[] GetUTF8Bytes(string str,long filePos,out int size)
{
ObjectList objList=new ObjectList(objectNum,filePos);
byte []abuf;
byte[] ubuf = Encoding.Unicode.GetBytes(str);
Encoding enc = Encoding.GetEncoding(1252);
abuf = Encoding.Convert(Encoding.Unicode, enc, ubuf);
size=abuf.Length;
xref.offsets.Add(objList);
return abuf;
}
