/**
* Generate an object that contains an CMS Compressed Data
*/
public CmsCompressedData Generate(
CmsProcessable content,
string compressionOid)
{
AlgorithmIdentifier comAlgId;
Asn1OctetString comOcts;
try
{
MemoryStream bOut = new MemoryStream();
ZDeflaterOutputStream zOut = new ZDeflaterOutputStream(bOut);
content.Write(zOut);
zOut.Close();
comAlgId = new AlgorithmIdentifier(
new DerObjectIdentifier(compressionOid),
null);
comOcts = new BerOctetString(bOut.ToArray());
}
catch (IOException e)
{
throw new CmsException("exception encoding data.", e);
}
ContentInfo comContent = new ContentInfo(CmsObjectIdentifiers.Data, comOcts);
ContentInfo contentInfo = new ContentInfo(
CmsObjectIdentifiers.CompressedData,
new CompressedData(comAlgId, comContent));
return(new CmsCompressedData(contentInfo));
}
public override void Close()
{
_out.Close();
_eiGen.Close();
_cGen.Close();
_sGen.Close();
base.Close();
}
virtual public void WriteIccProfile(byte[] data)
{
MemoryStream stream = new MemoryStream();
stream.WriteByte((byte)'I');
stream.WriteByte((byte)'C');
stream.WriteByte((byte)'C');
stream.WriteByte(0);
stream.WriteByte(0);
ZDeflaterOutputStream zip = new ZDeflaterOutputStream(stream, 5);
zip.Write(data, 0, data.Length);
zip.Close();
WriteChunk(iCCP, stream.ToArray());
}
/**
* Creates a new PDF stream object that will replace a stream
* in a existing PDF file.
* @param reader the reader that holds the existing PDF
* @param conts the new content
* @param compressionLevel the compression level for the content
* @since 2.1.3 (replacing the existing constructor without param compressionLevel)
*/
public PRStream(PdfReader reader, byte[] conts, int compressionLevel)
{
this.reader = reader;
this.offset = -1;
if (Document.Compress)
{
MemoryStream stream = new MemoryStream();
ZDeflaterOutputStream zip = new ZDeflaterOutputStream(stream, compressionLevel);
zip.Write(conts, 0, conts.Length);
zip.Close();
bytes = stream.ToArray();
Put(PdfName.FILTER, PdfName.FLATEDECODE);
}
else
{
bytes = conts;
}
Length = bytes.Length;
}
/**Sets the data associated with the stream
* @param data raw data, decrypted and uncompressed.
*/
public void SetData(byte[] data)
{
Remove(PdfName.FILTER);
this.offset = -1;
if (Document.Compress)
{
MemoryStream stream = new MemoryStream();
ZDeflaterOutputStream zip = new ZDeflaterOutputStream(stream);
zip.Write(data, 0, data.Length);
zip.Close();
bytes = stream.ToArray();
Put(PdfName.FILTER, PdfName.FLATEDECODE);
}
else
{
bytes = data;
}
Length = bytes.Length;
}
/// <summary>
/// Creates a new PDF stream object that will replace a stream
/// in a existing PDF file.
/// @since 2.1.3 (replacing the existing constructor without param compressionLevel)
/// </summary>
/// <param name="reader">the reader that holds the existing PDF</param>
/// <param name="conts">the new content</param>
/// <param name="compressionLevel">the compression level for the content</param>
public PrStream(PdfReader reader, byte[] conts, int compressionLevel)
{
this.reader = reader;
offset = -1;
if (Document.Compress)
{
MemoryStream stream = new MemoryStream();
ZDeflaterOutputStream zip = new ZDeflaterOutputStream(stream, compressionLevel);
zip.Write(conts, 0, conts.Length);
zip.Close();
Bytes = stream.ToArray();
Put(PdfName.Filter, PdfName.Flatedecode);
}
else
{
Bytes = conts;
}
Length = Bytes.Length;
}
/// <summary>
/// Sets the data associated with the stream, either compressed or
/// uncompressed. Note that the data will never be compressed if
/// Document.compress is set to false.
/// @since iText 2.1.3
/// </summary>
/// <param name="data">raw data, decrypted and uncompressed.</param>
/// <param name="compress">true if you want the stream to be compresssed.</param>
/// <param name="compressionLevel">a value between -1 and 9 (ignored if compress == false)</param>
public void SetData(byte[] data, bool compress, int compressionLevel)
{
Remove(PdfName.Filter);
offset = -1;
if (Document.Compress && compress)
{
MemoryStream stream = new MemoryStream();
ZDeflaterOutputStream zip = new ZDeflaterOutputStream(stream, compressionLevel);
zip.Write(data, 0, data.Length);
zip.Close();
Bytes = stream.ToArray();
CompressionLevel = compressionLevel;
Put(PdfName.Filter, PdfName.Flatedecode);
}
else
{
Bytes = data;
}
Length = Bytes.Length;
}
virtual public void WriteData(byte[] data, int stride)
{
MemoryStream stream = new MemoryStream();
ZDeflaterOutputStream zip = new ZDeflaterOutputStream(stream, 5);
int k;
for (k = 0; k < data.Length - stride; k += stride)
{
zip.WriteByte(0);
zip.Write(data, k, stride);
}
int remaining = data.Length - k;
if (remaining > 0)
{
zip.WriteByte(0);
zip.Write(data, k, remaining);
}
zip.Close();
WriteChunk(IDAT, stream.ToArray());
}
