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()); }
/** * 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; }
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()); }
/** * 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. * * @param data raw data, decrypted and uncompressed. * @param compress true if you want the stream to be compresssed. * @param compressionLevel a value between -1 and 9 (ignored if compress == false) * @since iText 2.1.3 */ virtual public void SetData(byte[] data, bool compress, int compressionLevel) { Remove(PdfName.FILTER); this.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(); this.compressionLevel = compressionLevel; Put(PdfName.FILTER, PdfName.FLATEDECODE); } else bytes = data; Length = bytes.Length; }