public static void FlateEncode(Stream rawData, Stream result)
{
ZDeflaterOutputStream stream = new ZDeflaterOutputStream(result);
byte[] buffer = new byte[0x400];
int count = 0;
while ((count = rawData.Read(buffer, 0, buffer.Length)) > 0)
{
stream.Write(buffer, 0, count);
}
stream.Finish();
}
/// <summary>
/// Encodes the inner.
/// </summary>
/// <param name="rawData">The raw data.</param>
/// <param name="result">The result.</param>
/// <param name="options">The options.</param>
protected override void EncodeInner(Stream rawData, Stream result, Dictionary <PdfName, PdfObjectBase> options)
{
ZDeflaterOutputStream stream = new ZDeflaterOutputStream(result);
byte[] buffer = new byte[0x400];
int count = 0;
while ((count = rawData.Read(buffer, 0, buffer.Length)) > 0)
{
stream.Write(buffer, 0, count);
}
stream.Finish();
}
public void WriteData(byte[] data, int stride)
{
MemoryStream stream = new MemoryStream();
ZDeflaterOutputStream zip = new ZDeflaterOutputStream(stream, 5);
for (int k = 0; k < data.Length; k += stride)
{
zip.WriteByte(0);
zip.Write(data, k, stride);
}
zip.Finish();
WriteChunk(IDAT, stream.ToArray());
}
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.Finish();
WriteChunk(iCCP, stream.ToArray());
}
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.Finish();
WriteChunk(IDAT, stream.ToArray());
}
/**
* Compresses the stream.
* @param compressionLevel the compression level (0 = best speed, 9 = best compression, -1 is default)
* @since 2.1.3
*/
virtual public void FlateCompress(int compressionLevel)
{
if (!Document.Compress)
{
return;
}
// check if the flateCompress-method has already been used
if (compressed)
{
return;
}
this.compressionLevel = compressionLevel;
if (inputStream != null)
{
compressed = true;
return;
}
// check if a filter already exists
PdfObject filter = PdfReader.GetPdfObject(Get(PdfName.FILTER));
if (filter != null)
{
if (filter.IsName())
{
if (PdfName.FLATEDECODE.Equals(filter))
{
return;
}
}
else if (filter.IsArray())
{
if (((PdfArray)filter).Contains(PdfName.FLATEDECODE))
{
return;
}
}
else
{
throw new PdfException(MessageLocalization.GetComposedMessage("stream.could.not.be.compressed.filter.is.not.a.name.or.array"));
}
}
// compress
MemoryStream stream = new MemoryStream();
ZDeflaterOutputStream zip = new ZDeflaterOutputStream(stream, compressionLevel);
if (streamBytes != null)
{
streamBytes.WriteTo(zip);
}
else
{
zip.Write(bytes, 0, bytes.Length);
}
//zip.Close();
zip.Finish();
// update the object
streamBytes = stream;
bytes = null;
Put(PdfName.LENGTH, new PdfNumber(streamBytes.Length));
if (filter == null)
{
Put(PdfName.FILTER, PdfName.FLATEDECODE);
}
else
{
PdfArray filters = new PdfArray(filter);
filters.Add(0, PdfName.FLATEDECODE);
Put(PdfName.FILTER, filters);
}
compressed = true;
}
// methods
/**
* Compresses the stream.
*
* @throws PdfException if a filter is allready defined
*/
public void FlateCompress()
{
if (!Document.Compress)
{
return;
}
// check if the flateCompress-method has allready been
if (compressed)
{
return;
}
if (inputStream != null)
{
compressed = true;
return;
}
// check if a filter allready exists
PdfObject filter = Get(PdfName.FILTER);
if (filter != null)
{
if (filter.IsName() && ((PdfName)filter).CompareTo(PdfName.FLATEDECODE) == 0)
{
return;
}
else if (filter.IsArray() && ((PdfArray)filter).Contains(PdfName.FLATEDECODE))
{
return;
}
else
{
throw new PdfException("Stream could not be compressed: filter is not a name or array.");
}
}
// compress
MemoryStream stream = new MemoryStream();
ZDeflaterOutputStream zip = new ZDeflaterOutputStream(stream);
if (streamBytes != null)
{
streamBytes.WriteTo(zip);
}
else
{
zip.Write(bytes, 0, bytes.Length);
}
//zip.Close();
zip.Finish();
// update the object
streamBytes = stream;
bytes = null;
Put(PdfName.LENGTH, new PdfNumber(streamBytes.Length));
if (filter == null)
{
Put(PdfName.FILTER, PdfName.FLATEDECODE);
}
else
{
PdfArray filters = new PdfArray(filter);
filters.Add(PdfName.FLATEDECODE);
Put(PdfName.FILTER, filters);
}
compressed = true;
}
/// <summary>
/// methods
/// </summary>
/// <summary>
/// Compresses the stream.
/// @since 2.1.3
/// </summary>
/// <param name="compressionLevel">the compression level (0 = best speed, 9 = best compression, -1 is default)</param>
public void FlateCompress(int compressionLevel)
{
if (!Document.Compress)
{
return;
}
// check if the flateCompress-method has allready been
if (Compressed)
{
return;
}
CompressionLevel = compressionLevel;
if (InputStream != null)
{
Compressed = true;
return;
}
// check if a filter allready exists
PdfObject filter = PdfReader.GetPdfObject(Get(PdfName.Filter));
if (filter != null)
{
if (filter.IsName())
{
if (PdfName.Flatedecode.Equals(filter))
{
return;
}
}
else if (filter.IsArray())
{
if (((PdfArray)filter).Contains(PdfName.Flatedecode))
{
return;
}
}
else
{
throw new PdfException("Stream could not be compressed: filter is not a name or array.");
}
}
// compress
MemoryStream stream = new MemoryStream();
ZDeflaterOutputStream zip = new ZDeflaterOutputStream(stream, compressionLevel);
if (StreamBytes != null)
{
StreamBytes.WriteTo(zip);
}
else
{
zip.Write(Bytes, 0, Bytes.Length);
}
//zip.Close();
zip.Finish();
// update the object
StreamBytes = stream;
Bytes = null;
Put(PdfName.LENGTH, new PdfNumber(StreamBytes.Length));
if (filter == null)
{
Put(PdfName.Filter, PdfName.Flatedecode);
}
else
{
PdfArray filters = new PdfArray(filter);
filters.Add(PdfName.Flatedecode);
Put(PdfName.Filter, filters);
}
Compressed = true;
}
