/** * 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(); ZOutputStream zOut = new ZOutputStream(bOut, JZlib.Z_DEFAULT_COMPRESSION); content.Write(zOut); zOut.Dispose(); comAlgId = new AlgorithmIdentifier(new DerObjectIdentifier(compressionOid)); 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); }
/** * Compresses the stream. * @param compressionLevel the compression level (0 = best speed, 9 = best compression, -1 is default) * @since 2.1.3 */ public void FlateCompress(int compressionLevel) { if (!Document.Compress) return; // check if the flateCompress-method has allready been if (compressed) { return; } this.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(); var zip = new ZOutputStream(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; }
internal CmsCompressedOutputStream( ZOutputStream outStream, BerSequenceGenerator sGen, BerSequenceGenerator cGen, BerSequenceGenerator eiGen) { _out = outStream; _sGen = sGen; _cGen = cGen; _eiGen = eiGen; }
private static void EncryptWithCompressionInternal(DocumentHeaders outputDocumentHeaders, Stream inputStream, CryptoStream encryptingStream, ProgressContext progress) { using (ZOutputStream deflatingStream = new ZOutputStream(encryptingStream, -1)) { deflatingStream.FlushMode = JZlib.Z_SYNC_FLUSH; CopyToWithCount(inputStream, deflatingStream, progress); deflatingStream.FlushMode = JZlib.Z_FINISH; deflatingStream.Finish(); outputDocumentHeaders.UncompressedLength = deflatingStream.TotalIn; outputDocumentHeaders.PlaintextLength = deflatingStream.TotalOut; } }
/** * @see com.lowagie.text.pdf.PdfDictionary#toPdf(com.lowagie.text.pdf.PdfWriter, java.io.OutputStream) */ public override void ToPdf(PdfWriter writer, Stream os) { if (inputStream != null && compressed) Put(PdfName.FILTER, PdfName.FLATEDECODE); PdfEncryption crypto = null; if (writer != null) crypto = writer.Encryption; if (crypto != null) { PdfObject filter = Get(PdfName.FILTER); if (filter != null) { if (PdfName.CRYPT.Equals(filter)) crypto = null; else if (filter.IsArray()) { PdfArray a = (PdfArray)filter; if (!a.IsEmpty() && PdfName.CRYPT.Equals(a[0])) crypto = null; } } } if (crypto != null && crypto.IsEmbeddedFilesOnly()) { PdfArray filter = new PdfArray(); PdfArray decodeparms = new PdfArray(); PdfDictionary crypt = new PdfDictionary(); crypt.Put(PdfName.NAME, PdfName.STDCF); filter.Add(PdfName.CRYPT); decodeparms.Add(crypt); if (compressed) { filter.Add(PdfName.FLATEDECODE); decodeparms.Add(new PdfNull()); } Put(PdfName.FILTER, filter); Put(PdfName.DECODEPARMS, decodeparms); } PdfObject nn = Get(PdfName.LENGTH); if (crypto != null && nn != null && nn.IsNumber()) { int sz = ((PdfNumber)nn).IntValue; Put(PdfName.LENGTH, new PdfNumber(crypto.CalculateStreamSize(sz))); SuperToPdf(writer, os); Put(PdfName.LENGTH, nn); } else SuperToPdf(writer, os); os.Write(STARTSTREAM, 0, STARTSTREAM.Length); if (inputStream != null) { rawLength = 0; ZOutputStream def = null; OutputStreamCounter osc = new OutputStreamCounter(os); OutputStreamEncryption ose = null; Stream fout = osc; if (crypto != null) fout = ose = crypto.GetEncryptionStream(fout); if (compressed) fout = def = new ZOutputStream(fout, compressionLevel); byte[] buf = new byte[4192]; while (true) { int n = inputStream.Read(buf, 0, buf.Length); if (n <= 0) break; fout.Write(buf, 0, n); rawLength += n; } if (def != null) def.Finish(); if (ose != null) ose.Finish(); inputStreamLength = osc.Counter; } else { if (crypto == null) { if (streamBytes != null) streamBytes.WriteTo(os); else os.Write(bytes, 0, bytes.Length); } else { byte[] b; if (streamBytes != null) { b = crypto.EncryptByteArray(streamBytes.ToArray()); } else { b = crypto.EncryptByteArray(bytes); } os.Write(b, 0, b.Length); } } os.Write(ENDSTREAM, 0, ENDSTREAM.Length); }
protected static Image GetTiffImageColor(TIFFDirectory dir, RandomAccessFileOrArray s) { int predictor = 1; TIFFLZWDecoder lzwDecoder = null; int compression = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_COMPRESSION); switch (compression) { case TIFFConstants.COMPRESSION_NONE: case TIFFConstants.COMPRESSION_LZW: case TIFFConstants.COMPRESSION_PACKBITS: case TIFFConstants.COMPRESSION_DEFLATE: case TIFFConstants.COMPRESSION_ADOBE_DEFLATE: case TIFFConstants.COMPRESSION_OJPEG: case TIFFConstants.COMPRESSION_JPEG: break; default: throw new ArgumentException("The compression " + compression + " is not supported."); } int photometric = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PHOTOMETRIC); switch (photometric) { case TIFFConstants.PHOTOMETRIC_MINISWHITE: case TIFFConstants.PHOTOMETRIC_MINISBLACK: case TIFFConstants.PHOTOMETRIC_RGB: case TIFFConstants.PHOTOMETRIC_SEPARATED: case TIFFConstants.PHOTOMETRIC_PALETTE: break; default: if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG) throw new ArgumentException("The photometric " + photometric + " is not supported."); break; } float rotation = 0; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ORIENTATION)) { int rot = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ORIENTATION); if (rot == TIFFConstants.ORIENTATION_BOTRIGHT || rot == TIFFConstants.ORIENTATION_BOTLEFT) rotation = (float)Math.PI; else if (rot == TIFFConstants.ORIENTATION_LEFTTOP || rot == TIFFConstants.ORIENTATION_LEFTBOT) rotation = (float)(Math.PI / 2.0); else if (rot == TIFFConstants.ORIENTATION_RIGHTTOP || rot == TIFFConstants.ORIENTATION_RIGHTBOT) rotation = -(float)(Math.PI / 2.0); } if (dir.IsTagPresent(TIFFConstants.TIFFTAG_PLANARCONFIG) && dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PLANARCONFIG) == TIFFConstants.PLANARCONFIG_SEPARATE) throw new ArgumentException("Planar images are not supported."); if (dir.IsTagPresent(TIFFConstants.TIFFTAG_EXTRASAMPLES)) throw new ArgumentException("Extra samples are not supported."); int samplePerPixel = 1; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_SAMPLESPERPIXEL)) // 1,3,4 samplePerPixel = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_SAMPLESPERPIXEL); int bitsPerSample = 1; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_BITSPERSAMPLE)) bitsPerSample = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_BITSPERSAMPLE); switch (bitsPerSample) { case 1: case 2: case 4: case 8: break; default: throw new ArgumentException("Bits per sample " + bitsPerSample + " is not supported."); } Image img = null; int h = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGELENGTH); int w = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGEWIDTH); int dpiX = 0; int dpiY = 0; int resolutionUnit = TIFFConstants.RESUNIT_INCH; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_RESOLUTIONUNIT)) resolutionUnit = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_RESOLUTIONUNIT); dpiX = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_XRESOLUTION), resolutionUnit); dpiY = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_YRESOLUTION), resolutionUnit); int fillOrder = 1; bool reverse = false; TIFFField fillOrderField = dir.GetField(TIFFConstants.TIFFTAG_FILLORDER); if (fillOrderField != null) fillOrder = fillOrderField.GetAsInt(0); reverse = (fillOrder == TIFFConstants.FILLORDER_LSB2MSB); int rowsStrip = h; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ROWSPERSTRIP)) //another hack for broken tiffs rowsStrip = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_ROWSPERSTRIP); if (rowsStrip <= 0 || rowsStrip > h) rowsStrip = h; long[] offset = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPOFFSETS); long[] size = GetArrayLongShort(dir, TIFFConstants.TIFFTAG_STRIPBYTECOUNTS); if ((size == null || (size.Length == 1 && (size[0] == 0 || size[0] + offset[0] > s.Length))) && h == rowsStrip) { // some TIFF producers are really lousy, so... size = new long[]{s.Length - (int)offset[0]}; } if (compression == TIFFConstants.COMPRESSION_LZW) { TIFFField predictorField = dir.GetField(TIFFConstants.TIFFTAG_PREDICTOR); if (predictorField != null) { predictor = predictorField.GetAsInt(0); if (predictor != 1 && predictor != 2) { throw new Exception("Illegal value for Predictor in TIFF file."); } if (predictor == 2 && bitsPerSample != 8) { throw new Exception(bitsPerSample + "-bit samples are not supported for Horizontal differencing Predictor."); } } lzwDecoder = new TIFFLZWDecoder(w, predictor, samplePerPixel); } int rowsLeft = h; MemoryStream stream = null; ZOutputStream zip = null; CCITTG4Encoder g4 = null; if (bitsPerSample == 1 && samplePerPixel == 1) { g4 = new CCITTG4Encoder(w); } else { stream = new MemoryStream(); if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG) zip = new ZOutputStream(stream); } if (compression == TIFFConstants.COMPRESSION_OJPEG) { // Assume that the TIFFTAG_JPEGIFBYTECOUNT tag is optional, since it's obsolete and // is often missing if ((!dir.IsTagPresent(TIFFConstants.TIFFTAG_JPEGIFOFFSET))) { throw new IOException("Missing tag(s) for OJPEG compression."); } int jpegOffset = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_JPEGIFOFFSET); int jpegLength = s.Length - jpegOffset; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_JPEGIFBYTECOUNT)) { jpegLength = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_JPEGIFBYTECOUNT) + (int)size[0]; } byte[] jpeg = new byte[Math.Min(jpegLength, s.Length - jpegOffset)]; int posFilePointer = s.FilePointer; posFilePointer += jpegOffset; s.Seek(posFilePointer); s.ReadFully(jpeg); img = new Jpeg(jpeg); } else if (compression == TIFFConstants.COMPRESSION_JPEG) { if (size.Length > 1) throw new IOException("Compression JPEG is only supported with a single strip. This image has " + size.Length + " strips."); byte[] jpeg = new byte[(int)size[0]]; s.Seek(offset[0]); s.ReadFully(jpeg); img = new Jpeg(jpeg); } else { for (int k = 0; k < offset.Length; ++k) { byte[] im = new byte[(int)size[k]]; s.Seek(offset[k]); s.ReadFully(im); int height = Math.Min(rowsStrip, rowsLeft); byte[] outBuf = null; if (compression != TIFFConstants.COMPRESSION_NONE) outBuf = new byte[(w * bitsPerSample * samplePerPixel + 7) / 8 * height]; if (reverse) TIFFFaxDecoder.ReverseBits(im); switch (compression) { case TIFFConstants.COMPRESSION_DEFLATE: case TIFFConstants.COMPRESSION_ADOBE_DEFLATE: Inflate(im, outBuf); break; case TIFFConstants.COMPRESSION_NONE: outBuf = im; break; case TIFFConstants.COMPRESSION_PACKBITS: DecodePackbits(im, outBuf); break; case TIFFConstants.COMPRESSION_LZW: lzwDecoder.Decode(im, outBuf, height); break; } if (bitsPerSample == 1 && samplePerPixel == 1) { g4.Fax4Encode(outBuf, height); } else { zip.Write(outBuf, 0, outBuf.Length); } rowsLeft -= rowsStrip; } if (bitsPerSample == 1 && samplePerPixel == 1) { img = Image.GetInstance(w, h, false, Image.CCITTG4, photometric == TIFFConstants.PHOTOMETRIC_MINISBLACK ? Image.CCITT_BLACKIS1 : 0, g4.Close()); } else { zip.Close(); img = Image.GetInstance(w, h, samplePerPixel, bitsPerSample, stream.ToArray()); img.Deflated = true; } } img.SetDpi(dpiX, dpiY); if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG) { if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ICCPROFILE)) { try { TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_ICCPROFILE); ICC_Profile icc_prof = ICC_Profile.GetInstance(fd.GetAsBytes()); if (samplePerPixel == icc_prof.NumComponents) img.TagICC = icc_prof; } catch { //empty } } if (dir.IsTagPresent(TIFFConstants.TIFFTAG_COLORMAP)) { TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_COLORMAP); char[] rgb = fd.GetAsChars(); byte[] palette = new byte[rgb.Length]; int gColor = rgb.Length / 3; int bColor = gColor * 2; for (int k = 0; k < gColor; ++k) { palette[k * 3] = (byte)(rgb[k] >> 8); palette[k * 3 + 1] = (byte)(rgb[k + gColor] >> 8); palette[k * 3 + 2] = (byte)(rgb[k + bColor] >> 8); } PdfArray indexed = new PdfArray(); indexed.Add(PdfName.INDEXED); indexed.Add(PdfName.DEVICERGB); indexed.Add(new PdfNumber(gColor - 1)); indexed.Add(new PdfString(palette)); PdfDictionary additional = new PdfDictionary(); additional.Put(PdfName.COLORSPACE, indexed); img.Additional = additional; } img.OriginalType = Image.ORIGINAL_TIFF; } if (photometric == TIFFConstants.PHOTOMETRIC_MINISWHITE) img.Inverted = true; if (rotation != 0) img.InitialRotation = rotation; return img; }
/** * 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(); var zip = new ZOutputStream(stream, compressionLevel); zip.Write(conts, 0, conts.Length); zip.Close(); bytes = stream.ToArray(); Put(PdfName.FILTER, PdfName.FLATEDECODE); } else bytes = conts; Length = bytes.Length; }