/** Reads a page from a TIFF image. * @param s the file source * @param page the page to get. The first page is 1 * @param direct for single strip, CCITT images, generate the image * by direct byte copying. It's faster but may not work * every time * @return the <CODE>Image</CODE> */ public static Image GetTiffImage(RandomAccessFileOrArray s, int page, bool direct) { if (page < 1) { throw new ArgumentException("The page number must be >= 1."); } TIFFDirectory dir = new TIFFDirectory(s, page - 1); if (dir.IsTagPresent(TIFFConstants.TIFFTAG_TILEWIDTH)) { throw new ArgumentException("Tiles are not supported."); } int compression = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_COMPRESSION); switch (compression) { case TIFFConstants.COMPRESSION_CCITTRLEW: case TIFFConstants.COMPRESSION_CCITTRLE: case TIFFConstants.COMPRESSION_CCITTFAX3: case TIFFConstants.COMPRESSION_CCITTFAX4: break; default: return(GetTiffImageColor(dir, s)); } 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); } } Image img = null; long tiffT4Options = 0; long tiffT6Options = 0; int fillOrder = 1; int h = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGELENGTH); int w = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGEWIDTH); int dpiX = 0; int dpiY = 0; float XYRatio = 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); if (resolutionUnit == TIFFConstants.RESUNIT_NONE) { if (dpiY != 0) { XYRatio = (float)dpiX / (float)dpiY; } dpiX = 0; dpiY = 0; } int rowsStrip = h; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ROWSPERSTRIP)) { 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] }; } bool reverse = false; TIFFField fillOrderField = dir.GetField(TIFFConstants.TIFFTAG_FILLORDER); if (fillOrderField != null) { fillOrder = fillOrderField.GetAsInt(0); } reverse = (fillOrder == TIFFConstants.FILLORDER_LSB2MSB); int paramsn = 0; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_PHOTOMETRIC)) { long photo = dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PHOTOMETRIC); if (photo == TIFFConstants.PHOTOMETRIC_MINISBLACK) { paramsn |= Image.CCITT_BLACKIS1; } } int imagecomp = 0; switch (compression) { case TIFFConstants.COMPRESSION_CCITTRLEW: case TIFFConstants.COMPRESSION_CCITTRLE: imagecomp = Image.CCITTG3_1D; paramsn |= Image.CCITT_ENCODEDBYTEALIGN | Image.CCITT_ENDOFBLOCK; break; case TIFFConstants.COMPRESSION_CCITTFAX3: imagecomp = Image.CCITTG3_1D; paramsn |= Image.CCITT_ENDOFLINE | Image.CCITT_ENDOFBLOCK; TIFFField t4OptionsField = dir.GetField(TIFFConstants.TIFFTAG_GROUP3OPTIONS); if (t4OptionsField != null) { tiffT4Options = t4OptionsField.GetAsLong(0); if ((tiffT4Options & TIFFConstants.GROUP3OPT_2DENCODING) != 0) { imagecomp = Image.CCITTG3_2D; } if ((tiffT4Options & TIFFConstants.GROUP3OPT_FILLBITS) != 0) { paramsn |= Image.CCITT_ENCODEDBYTEALIGN; } } break; case TIFFConstants.COMPRESSION_CCITTFAX4: imagecomp = Image.CCITTG4; TIFFField t6OptionsField = dir.GetField(TIFFConstants.TIFFTAG_GROUP4OPTIONS); if (t6OptionsField != null) { tiffT6Options = t6OptionsField.GetAsLong(0); } break; } if (direct && rowsStrip == h) //single strip, direct { byte[] im = new byte[(int)size[0]]; s.Seek(offset[0]); s.ReadFully(im); img = Image.GetInstance(w, h, false, imagecomp, paramsn, im); img.Inverted = true; } else { int rowsLeft = h; CCITTG4Encoder g4 = new CCITTG4Encoder(w); 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); TIFFFaxDecoder decoder = new TIFFFaxDecoder(fillOrder, w, height); byte[] outBuf = new byte[(w + 7) / 8 * height]; switch (compression) { case TIFFConstants.COMPRESSION_CCITTRLEW: case TIFFConstants.COMPRESSION_CCITTRLE: decoder.Decode1D(outBuf, im, 0, height); g4.Fax4Encode(outBuf, height); break; case TIFFConstants.COMPRESSION_CCITTFAX3: try { decoder.Decode2D(outBuf, im, 0, height, tiffT4Options); } catch (Exception e) { // let's flip the fill bits and try again... tiffT4Options ^= TIFFConstants.GROUP3OPT_FILLBITS; try { decoder.Decode2D(outBuf, im, 0, height, tiffT4Options); } catch { throw e; } } g4.Fax4Encode(outBuf, height); break; case TIFFConstants.COMPRESSION_CCITTFAX4: decoder.DecodeT6(outBuf, im, 0, height, tiffT6Options); g4.Fax4Encode(outBuf, height); break; } rowsLeft -= rowsStrip; } byte[] g4pic = g4.Close(); img = Image.GetInstance(w, h, false, Image.CCITTG4, paramsn & Image.CCITT_BLACKIS1, g4pic); } img.SetDpi(dpiX, dpiY); img.XYRatio = XYRatio; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ICCPROFILE)) { try { TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_ICCPROFILE); ICC_Profile icc_prof = ICC_Profile.GetInstance(fd.GetAsBytes()); if (icc_prof.NumComponents == 1) { img.TagICC = icc_prof; } } catch { //empty } } img.OriginalType = Image.ORIGINAL_TIFF; if (rotation != 0) { img.InitialRotation = rotation; } return(img); }
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; ZDeflaterOutputStream 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 ZDeflaterOutputStream(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); }
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(MessageLocalization.GetComposedMessage("the.compression.1.is.not.supported", compression)); } 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(MessageLocalization.GetComposedMessage("the.photometric.1.is.not.supported", photometric)); } 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(MessageLocalization.GetComposedMessage("planar.images.are.not.supported")); } int extraSamples = 0; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_EXTRASAMPLES)) { extraSamples = 1; } 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(MessageLocalization.GetComposedMessage("bits.per.sample.1.is.not.supported", bitsPerSample)); } 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 || compression == TIFFConstants.COMPRESSION_DEFLATE || compression == TIFFConstants.COMPRESSION_ADOBE_DEFLATE) { TIFFField predictorField = dir.GetField(TIFFConstants.TIFFTAG_PREDICTOR); if (predictorField != null) { predictor = predictorField.GetAsInt(0); if (predictor != 1 && predictor != 2) { throw new Exception(MessageLocalization.GetComposedMessage("illegal.value.for.predictor.in.tiff.file")); } if (predictor == 2 && bitsPerSample != 8) { throw new Exception(MessageLocalization.GetComposedMessage("1.bit.samples.are.not.supported.for.horizontal.differencing.predictor", bitsPerSample)); } } } if (compression == TIFFConstants.COMPRESSION_LZW) { lzwDecoder = new TIFFLZWDecoder(w, predictor, samplePerPixel); } int rowsLeft = h; MemoryStream stream = null; MemoryStream mstream = null; ZDeflaterOutputStream zip = null; ZDeflaterOutputStream mzip = null; if (extraSamples > 0) { mstream = new MemoryStream(); mzip = new ZDeflaterOutputStream(mstream); } CCITTG4Encoder g4 = null; if (bitsPerSample == 1 && samplePerPixel == 1 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE) { g4 = new CCITTG4Encoder(w); } else { stream = new MemoryStream(); if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG) { zip = new ZDeflaterOutputStream(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(MessageLocalization.GetComposedMessage("missing.tag.s.for.ojpeg.compression")); } int jpegOffset = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_JPEGIFOFFSET); int jpegLength = (int)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 = (int)s.FilePointer; posFilePointer += jpegOffset; s.Seek(posFilePointer); s.ReadFully(jpeg); // if quantization and/or Huffman tables are stored separately in the tiff, // we need to add them to the jpeg data TIFFField jpegtables = dir.GetField(TIFFConstants.TIFFTAG_JPEGTABLES); if (jpegtables != null) { byte[] temp = jpegtables.GetAsBytes(); int tableoffset = 0; int tablelength = temp.Length; // remove FFD8 from start if (temp[0] == (byte)0xFF && temp[1] == (byte)0xD8) { tableoffset = 2; tablelength -= 2; } // remove FFD9 from end if (temp[temp.Length - 2] == (byte)0xFF && temp[temp.Length - 1] == (byte)0xD9) { tablelength -= 2; } byte[] tables = new byte[tablelength]; Array.Copy(temp, tableoffset, tables, 0, tablelength); // TODO insert after JFIF header, instead of at the start byte[] jpegwithtables = new byte[jpeg.Length + tables.Length]; Array.Copy(jpeg, 0, jpegwithtables, 0, 2); Array.Copy(tables, 0, jpegwithtables, 2, tables.Length); Array.Copy(jpeg, 2, jpegwithtables, tables.Length + 2, jpeg.Length - 2); jpeg = jpegwithtables; } img = new Jpeg(jpeg); } else if (compression == TIFFConstants.COMPRESSION_JPEG) { if (size.Length > 1) { throw new IOException(MessageLocalization.GetComposedMessage("compression.jpeg.is.only.supported.with.a.single.strip.this.image.has.1.strips", size.Length)); } byte[] jpeg = new byte[(int)size[0]]; s.Seek(offset[0]); s.ReadFully(jpeg); img = new Jpeg(jpeg); if (photometric == TIFFConstants.PHOTOMETRIC_RGB) { img.ColorTransform = 0; } } 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); ApplyPredictor(outBuf, predictor, w, height, samplePerPixel); 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 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE) { g4.Fax4Encode(outBuf, height); } else { if (extraSamples > 0) { ProcessExtraSamples(zip, mzip, outBuf, samplePerPixel, bitsPerSample, w, height); } else { zip.Write(outBuf, 0, outBuf.Length); } } rowsLeft -= rowsStrip; } if (bitsPerSample == 1 && samplePerPixel == 1 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE) { img = Image.GetInstance(w, h, false, Image.CCITTG4, photometric == TIFFConstants.PHOTOMETRIC_MINISBLACK ? Image.CCITT_BLACKIS1 : 0, g4.Close()); } else { zip.Close(); img = new ImgRaw(w, h, samplePerPixel - extraSamples, 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 - extraSamples == 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); } // Colormap components are supposed to go from 0 to 655535 but, // as usually, some tiff producers just put values from 0 to 255. // Let's check for these broken tiffs. bool colormapBroken = true; for (int k = 0; k < palette.Length; ++k) { if (palette[k] != 0) { colormapBroken = false; break; } } if (colormapBroken) { for (int k = 0; k < gColor; ++k) { palette[k * 3] = (byte)rgb[k]; palette[k * 3 + 1] = (byte)rgb[k + gColor]; palette[k * 3 + 2] = (byte)rgb[k + bColor]; } } 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; } if (extraSamples > 0) { mzip.Close(); Image mimg = Image.GetInstance(w, h, 1, bitsPerSample, mstream.ToArray()); mimg.MakeMask(); mimg.Deflated = true; img.ImageMask = mimg; } return(img); }
/// <exception cref="System.IO.IOException"/> protected internal virtual void AssembleFont() { int[] tableLocation; int fullFontSize = 0; IList <String> tableNames = new List <String>(); tableNames.AddAll(tableNamesSimple); if (includeExtras) { tableNames.AddAll(tableNamesExtra); } else { if (includeCmap) { tableNames.AddAll(tableNamesCmap); } } int tablesUsed = 2; foreach (String name in tableNames) { if (name.Equals("glyf") || name.Equals("loca")) { continue; } tableLocation = tableDirectory.Get(name); if (tableLocation == null) { continue; } tablesUsed++; fullFontSize += tableLocation[TABLE_LENGTH] + 3 & ~3; } fullFontSize += newLocaTableOut.Length; fullFontSize += newGlyfTable.Length; int reference = 16 * tablesUsed + 12; fullFontSize += reference; outFont = new byte[fullFontSize]; fontPtr = 0; WriteFontInt(0x00010000); WriteFontShort(tablesUsed); int selector = entrySelectors[tablesUsed]; WriteFontShort((1 << selector) * 16); WriteFontShort(selector); WriteFontShort((tablesUsed - (1 << selector)) * 16); foreach (String name in tableNames) { int len; tableLocation = tableDirectory.Get(name); if (tableLocation == null) { continue; } WriteFontString(name); switch (name) { case "glyf": { WriteFontInt(CalculateChecksum(newGlyfTable)); len = glyfTableRealSize; break; } case "loca": { WriteFontInt(CalculateChecksum(newLocaTableOut)); len = locaTableRealSize; break; } default: { WriteFontInt(tableLocation[TABLE_CHECKSUM]); len = tableLocation[TABLE_LENGTH]; break; } } WriteFontInt(reference); WriteFontInt(len); reference += len + 3 & ~3; } foreach (String name in tableNames) { tableLocation = tableDirectory.Get(name); if (tableLocation == null) { continue; } switch (name) { case "glyf": { Array.Copy(newGlyfTable, 0, outFont, fontPtr, newGlyfTable.Length); fontPtr += newGlyfTable.Length; newGlyfTable = null; break; } case "loca": { Array.Copy(newLocaTableOut, 0, outFont, fontPtr, newLocaTableOut.Length); fontPtr += newLocaTableOut.Length; newLocaTableOut = null; break; } default: { rf.Seek(tableLocation[TABLE_OFFSET]); rf.ReadFully(outFont, fontPtr, tableLocation[TABLE_LENGTH]); fontPtr += tableLocation[TABLE_LENGTH] + 3 & ~3; break; } } } }
/** Reads a page from a TIFF image. * @param s the file source * @param page the page to get. The first page is 1 * @param direct for single strip, CCITT images, generate the image * by direct byte copying. It's faster but may not work * every time * @return the <CODE>Image</CODE> */ public static Image GetTiffImage(RandomAccessFileOrArray s, int page, bool direct) { if (page < 1) throw new ArgumentException("The page number must be >= 1."); TIFFDirectory dir = new TIFFDirectory(s, page - 1); if (dir.IsTagPresent(TIFFConstants.TIFFTAG_TILEWIDTH)) throw new ArgumentException("Tiles are not supported."); int compression = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_COMPRESSION); switch (compression) { case TIFFConstants.COMPRESSION_CCITTRLEW: case TIFFConstants.COMPRESSION_CCITTRLE: case TIFFConstants.COMPRESSION_CCITTFAX3: case TIFFConstants.COMPRESSION_CCITTFAX4: break; default: return GetTiffImageColor(dir, s); } 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); } Image img = null; long tiffT4Options = 0; long tiffT6Options = 0; int fillOrder = 1; int h = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGELENGTH); int w = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGEWIDTH); int dpiX = 0; int dpiY = 0; float XYRatio = 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); if (resolutionUnit == TIFFConstants.RESUNIT_NONE) { if (dpiY != 0) XYRatio = (float)dpiX / (float)dpiY; dpiX = 0; dpiY = 0; } int rowsStrip = h; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ROWSPERSTRIP)) 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]}; } bool reverse = false; TIFFField fillOrderField = dir.GetField(TIFFConstants.TIFFTAG_FILLORDER); if (fillOrderField != null) fillOrder = fillOrderField.GetAsInt(0); reverse = (fillOrder == TIFFConstants.FILLORDER_LSB2MSB); int paramsn = 0; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_PHOTOMETRIC)) { long photo = dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PHOTOMETRIC); if (photo == TIFFConstants.PHOTOMETRIC_MINISBLACK) paramsn |= Image.CCITT_BLACKIS1; } int imagecomp = 0; switch (compression) { case TIFFConstants.COMPRESSION_CCITTRLEW: case TIFFConstants.COMPRESSION_CCITTRLE: imagecomp = Image.CCITTG3_1D; paramsn |= Image.CCITT_ENCODEDBYTEALIGN | Image.CCITT_ENDOFBLOCK; break; case TIFFConstants.COMPRESSION_CCITTFAX3: imagecomp = Image.CCITTG3_1D; paramsn |= Image.CCITT_ENDOFLINE | Image.CCITT_ENDOFBLOCK; TIFFField t4OptionsField = dir.GetField(TIFFConstants.TIFFTAG_GROUP3OPTIONS); if (t4OptionsField != null) { tiffT4Options = t4OptionsField.GetAsLong(0); if ((tiffT4Options & TIFFConstants.GROUP3OPT_2DENCODING) != 0) imagecomp = Image.CCITTG3_2D; if ((tiffT4Options & TIFFConstants.GROUP3OPT_FILLBITS) != 0) paramsn |= Image.CCITT_ENCODEDBYTEALIGN; } break; case TIFFConstants.COMPRESSION_CCITTFAX4: imagecomp = Image.CCITTG4; TIFFField t6OptionsField = dir.GetField(TIFFConstants.TIFFTAG_GROUP4OPTIONS); if (t6OptionsField != null) tiffT6Options = t6OptionsField.GetAsLong(0); break; } if (direct && rowsStrip == h) { //single strip, direct byte[] im = new byte[(int)size[0]]; s.Seek(offset[0]); s.ReadFully(im); img = Image.GetInstance(w, h, false, imagecomp, paramsn, im); img.Inverted = true; } else { int rowsLeft = h; CCITTG4Encoder g4 = new CCITTG4Encoder(w); 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); TIFFFaxDecoder decoder = new TIFFFaxDecoder(fillOrder, w, height); byte[] outBuf = new byte[(w + 7) / 8 * height]; switch (compression) { case TIFFConstants.COMPRESSION_CCITTRLEW: case TIFFConstants.COMPRESSION_CCITTRLE: decoder.Decode1D(outBuf, im, 0, height); g4.Fax4Encode(outBuf, height); break; case TIFFConstants.COMPRESSION_CCITTFAX3: try { decoder.Decode2D(outBuf, im, 0, height, tiffT4Options); } catch (Exception e) { // let's flip the fill bits and try again... tiffT4Options ^= TIFFConstants.GROUP3OPT_FILLBITS; try { decoder.Decode2D(outBuf, im, 0, height, tiffT4Options); } catch { throw e; } } g4.Fax4Encode(outBuf, height); break; case TIFFConstants.COMPRESSION_CCITTFAX4: decoder.DecodeT6(outBuf, im, 0, height, tiffT6Options); g4.Fax4Encode(outBuf, height); break; } rowsLeft -= rowsStrip; } byte[] g4pic = g4.Close(); img = Image.GetInstance(w, h, false, Image.CCITTG4, paramsn & Image.CCITT_BLACKIS1, g4pic); } img.SetDpi(dpiX, dpiY); img.XYRatio = XYRatio; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ICCPROFILE)) { try { TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_ICCPROFILE); ICC_Profile icc_prof = ICC_Profile.GetInstance(fd.GetAsBytes()); if (icc_prof.NumComponents == 1) img.TagICC = icc_prof; } catch { //empty } } img.OriginalType = Image.ORIGINAL_TIFF; if (rotation != 0) img.InitialRotation = rotation; return img; }
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; }
private void Initialize(RandomAccessFileOrArray stream) { long nextTagOffset = 0L; long maxOffset = (long)stream.Length; int i, j; IFDOffset = stream.FilePointer; numEntries = ReadUnsignedShort(stream); fields = new TIFFField[numEntries]; for (i = 0; (i < numEntries) && (nextTagOffset < maxOffset); i++) { int tag = ReadUnsignedShort(stream); int type = ReadUnsignedShort(stream); int count = (int)(ReadUnsignedInt(stream)); bool processTag = true; // The place to return to to read the next tag nextTagOffset = stream.FilePointer + 4; try { // If the tag data can't fit in 4 bytes, the next 4 bytes // contain the starting offset of the data if (count * sizeOfType[type] > 4) { long valueOffset = ReadUnsignedInt(stream); // bounds check offset for EOF if (valueOffset < maxOffset) { stream.Seek(valueOffset); } else { // bad offset pointer .. skip tag processTag = false; } } } catch (ArgumentOutOfRangeException) { // if the data type is unknown we should skip this TIFF Field processTag = false; } if (processTag) { fieldIndex[tag] = i; Object obj = null; switch (type) { case TIFFField.TIFF_BYTE: case TIFFField.TIFF_SBYTE: case TIFFField.TIFF_UNDEFINED: case TIFFField.TIFF_ASCII: byte[] bvalues = new byte[count]; stream.ReadFully(bvalues, 0, count); if (type == TIFFField.TIFF_ASCII) { // Can be multiple strings int index = 0, prevIndex = 0; List <string> v = new List <string>(); while (index < count) { while ((index < count) && (bvalues[index++] != 0)) { ; } // When we encountered zero, means one string has ended char[] cht = new char[index - prevIndex]; Array.Copy(bvalues, prevIndex, cht, 0, index - prevIndex); v.Add(new String(cht)); prevIndex = index; } count = v.Count; String[] strings = new String[count]; for (int c = 0; c < count; c++) { strings[c] = v[c]; } obj = strings; } else { obj = bvalues; } break; case TIFFField.TIFF_SHORT: char[] cvalues = new char[count]; for (j = 0; j < count; j++) { cvalues[j] = (char)(ReadUnsignedShort(stream)); } obj = cvalues; break; case TIFFField.TIFF_LONG: long[] lvalues = new long[count]; for (j = 0; j < count; j++) { lvalues[j] = ReadUnsignedInt(stream); } obj = lvalues; break; case TIFFField.TIFF_RATIONAL: long[][] llvalues = new long[count][]; for (j = 0; j < count; j++) { long v0 = ReadUnsignedInt(stream); long v1 = ReadUnsignedInt(stream); llvalues[j] = new long[] { v0, v1 }; } obj = llvalues; break; case TIFFField.TIFF_SSHORT: short[] svalues = new short[count]; for (j = 0; j < count; j++) { svalues[j] = ReadShort(stream); } obj = svalues; break; case TIFFField.TIFF_SLONG: int[] ivalues = new int[count]; for (j = 0; j < count; j++) { ivalues[j] = ReadInt(stream); } obj = ivalues; break; case TIFFField.TIFF_SRATIONAL: int[,] iivalues = new int[count, 2]; for (j = 0; j < count; j++) { iivalues[j, 0] = ReadInt(stream); iivalues[j, 1] = ReadInt(stream); } obj = iivalues; break; case TIFFField.TIFF_FLOAT: float[] fvalues = new float[count]; for (j = 0; j < count; j++) { fvalues[j] = ReadFloat(stream); } obj = fvalues; break; case TIFFField.TIFF_DOUBLE: double[] dvalues = new double[count]; for (j = 0; j < count; j++) { dvalues[j] = ReadDouble(stream); } obj = dvalues; break; default: break; } fields[i] = new TIFFField(tag, type, count, obj); } stream.Seek(nextTagOffset); } // Read the offset of the next IFD. try { nextIFDOffset = ReadUnsignedInt(stream); } catch { // broken tiffs may not have this pointer nextIFDOffset = 0; } }
private static void ProcessTiffImage(RandomAccessFileOrArray s, TiffImageHelper.TiffParameters tiff) { bool recoverFromImageError = tiff.image.IsRecoverFromImageError(); int page = tiff.image.GetPage(); bool direct = tiff.image.IsDirect(); if (page < 1) { throw new iText.IO.IOException(iText.IO.IOException.PageNumberMustBeGtEq1); } try { TIFFDirectory dir = new TIFFDirectory(s, page - 1); if (dir.IsTagPresent(TIFFConstants.TIFFTAG_TILEWIDTH)) { throw new iText.IO.IOException(iText.IO.IOException.TilesAreNotSupported); } int compression = TIFFConstants.COMPRESSION_NONE; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_COMPRESSION)) { compression = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_COMPRESSION); } switch (compression) { case TIFFConstants.COMPRESSION_CCITTRLEW: case TIFFConstants.COMPRESSION_CCITTRLE: case TIFFConstants.COMPRESSION_CCITTFAX3: case TIFFConstants.COMPRESSION_CCITTFAX4: { break; } default: { ProcessTiffImageColor(dir, s, tiff); return; } } 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); } } } } long tiffT4Options = 0; long tiffT6Options = 0; int fillOrder = 1; int h = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGELENGTH); int w = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGEWIDTH); float XYRatio = 0; int resolutionUnit = TIFFConstants.RESUNIT_INCH; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_RESOLUTIONUNIT)) { resolutionUnit = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_RESOLUTIONUNIT); } int dpiX = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_XRESOLUTION), resolutionUnit); int dpiY = GetDpi(dir.GetField(TIFFConstants.TIFFTAG_YRESOLUTION), resolutionUnit); if (resolutionUnit == TIFFConstants.RESUNIT_NONE) { if (dpiY != 0) { XYRatio = (float)dpiX / (float)dpiY; } dpiX = 0; dpiY = 0; } int rowsStrip = h; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ROWSPERSTRIP)) { 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); // some TIFF producers are really lousy, so... if ((size == null || (size.Length == 1 && (size[0] == 0 || size[0] + offset[0] > s.Length()))) && h == rowsStrip ) { size = new long[] { s.Length() - (int)offset[0] }; } bool reverse = false; TIFFField fillOrderField = dir.GetField(TIFFConstants.TIFFTAG_FILLORDER); if (fillOrderField != null) { fillOrder = fillOrderField.GetAsInt(0); } reverse = (fillOrder == TIFFConstants.FILLORDER_LSB2MSB); int parameters = 0; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_PHOTOMETRIC)) { long photo = dir.GetFieldAsLong(TIFFConstants.TIFFTAG_PHOTOMETRIC); if (photo == TIFFConstants.PHOTOMETRIC_MINISBLACK) { parameters |= RawImageData.CCITT_BLACKIS1; } } int imagecomp = 0; switch (compression) { case TIFFConstants.COMPRESSION_CCITTRLEW: case TIFFConstants.COMPRESSION_CCITTRLE: { imagecomp = RawImageData.CCITTG3_1D; parameters |= RawImageData.CCITT_ENCODEDBYTEALIGN | RawImageData.CCITT_ENDOFBLOCK; break; } case TIFFConstants.COMPRESSION_CCITTFAX3: { imagecomp = RawImageData.CCITTG3_1D; parameters |= RawImageData.CCITT_ENDOFLINE | RawImageData.CCITT_ENDOFBLOCK; TIFFField t4OptionsField = dir.GetField(TIFFConstants.TIFFTAG_GROUP3OPTIONS); if (t4OptionsField != null) { tiffT4Options = t4OptionsField.GetAsLong(0); if ((tiffT4Options & TIFFConstants.GROUP3OPT_2DENCODING) != 0) { imagecomp = RawImageData.CCITTG3_2D; } if ((tiffT4Options & TIFFConstants.GROUP3OPT_FILLBITS) != 0) { parameters |= RawImageData.CCITT_ENCODEDBYTEALIGN; } } break; } case TIFFConstants.COMPRESSION_CCITTFAX4: { imagecomp = RawImageData.CCITTG4; TIFFField t6OptionsField = dir.GetField(TIFFConstants.TIFFTAG_GROUP4OPTIONS); if (t6OptionsField != null) { tiffT6Options = t6OptionsField.GetAsLong(0); } break; } } //single strip, direct if (direct && rowsStrip == h) { byte[] im = new byte[(int)size[0]]; s.Seek(offset[0]); s.ReadFully(im); RawImageHelper.UpdateRawImageParameters(tiff.image, w, h, false, imagecomp, parameters, im, null); tiff.image.SetInverted(true); } else { int rowsLeft = h; CCITTG4Encoder g4 = new CCITTG4Encoder(w); 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); TIFFFaxDecoder decoder = new TIFFFaxDecoder(fillOrder, w, height); decoder.SetRecoverFromImageError(recoverFromImageError); byte[] outBuf = new byte[(w + 7) / 8 * height]; switch (compression) { case TIFFConstants.COMPRESSION_CCITTRLEW: case TIFFConstants.COMPRESSION_CCITTRLE: { decoder.Decode1D(outBuf, im, 0, height); g4.Fax4Encode(outBuf, height); break; } case TIFFConstants.COMPRESSION_CCITTFAX3: { try { decoder.Decode2D(outBuf, im, 0, height, tiffT4Options); } catch (Exception e) { // let's flip the fill bits and try again... tiffT4Options ^= TIFFConstants.GROUP3OPT_FILLBITS; try { decoder.Decode2D(outBuf, im, 0, height, tiffT4Options); } catch (Exception) { if (!recoverFromImageError) { throw e; } if (rowsStrip == 1) { throw e; } // repeat of reading the tiff directly (the if section of this if else structure) // copy pasted to avoid making a method with 10 tiff im = new byte[(int)size[0]]; s.Seek(offset[0]); s.ReadFully(im); RawImageHelper.UpdateRawImageParameters(tiff.image, w, h, false, imagecomp, parameters, im, null); tiff.image.SetInverted(true); tiff.image.SetDpi(dpiX, dpiY); tiff.image.SetXYRatio(XYRatio); if (rotation != 0) { tiff.image.SetRotation(rotation); } return; } } g4.Fax4Encode(outBuf, height); break; } case TIFFConstants.COMPRESSION_CCITTFAX4: { try { decoder.DecodeT6(outBuf, im, 0, height, tiffT6Options); } catch (iText.IO.IOException e) { if (!recoverFromImageError) { throw; } } g4.Fax4Encode(outBuf, height); break; } } rowsLeft -= rowsStrip; } byte[] g4pic = g4.Close(); RawImageHelper.UpdateRawImageParameters(tiff.image, w, h, false, RawImageData.CCITTG4, parameters & RawImageData .CCITT_BLACKIS1, g4pic, null); } tiff.image.SetDpi(dpiX, dpiY); if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ICCPROFILE)) { try { TIFFField fd = dir.GetField(TIFFConstants.TIFFTAG_ICCPROFILE); IccProfile icc_prof = IccProfile.GetInstance(fd.GetAsBytes()); if (icc_prof.GetNumComponents() == 1) { tiff.image.SetProfile(icc_prof); } } catch (Exception) { } } //empty if (rotation != 0) { tiff.image.SetRotation(rotation); } } catch (Exception) { throw new iText.IO.IOException(iText.IO.IOException.CannotReadTiffImage); } }
private static void ProcessTiffImageColor(TIFFDirectory dir, RandomAccessFileOrArray s, TiffImageHelper.TiffParameters tiff) { try { int compression = TIFFConstants.COMPRESSION_NONE; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_COMPRESSION)) { compression = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_COMPRESSION); } int predictor = 1; TIFFLZWDecoder lzwDecoder = null; 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 iText.IO.IOException(iText.IO.IOException.Compression1IsNotSupported).SetMessageParams(compression ); } } 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 iText.IO.IOException(iText.IO.IOException.Photometric1IsNotSupported).SetMessageParams(photometric ); } 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 iText.IO.IOException(iText.IO.IOException.PlanarImagesAreNotSupported); } int extraSamples = 0; if (dir.IsTagPresent(TIFFConstants.TIFFTAG_EXTRASAMPLES)) { extraSamples = 1; } int samplePerPixel = 1; // 1,3,4 if (dir.IsTagPresent(TIFFConstants.TIFFTAG_SAMPLESPERPIXEL)) { 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 iText.IO.IOException(iText.IO.IOException.BitsPerSample1IsNotSupported).SetMessageParams(bitsPerSample ); } } int h = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGELENGTH); int w = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_IMAGEWIDTH); int dpiX; int dpiY; 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; TIFFField fillOrderField = dir.GetField(TIFFConstants.TIFFTAG_FILLORDER); if (fillOrderField != null) { fillOrder = fillOrderField.GetAsInt(0); } bool reverse = (fillOrder == TIFFConstants.FILLORDER_LSB2MSB); int rowsStrip = h; // another hack for broken tiffs if (dir.IsTagPresent(TIFFConstants.TIFFTAG_ROWSPERSTRIP)) { 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); // some TIFF producers are really lousy, so... if ((size == null || (size.Length == 1 && (size[0] == 0 || size[0] + offset[0] > s.Length()))) && h == rowsStrip ) { size = new long[] { s.Length() - (int)offset[0] }; } if (compression == TIFFConstants.COMPRESSION_LZW || compression == TIFFConstants.COMPRESSION_DEFLATE || compression == TIFFConstants.COMPRESSION_ADOBE_DEFLATE) { TIFFField predictorField = dir.GetField(TIFFConstants.TIFFTAG_PREDICTOR); if (predictorField != null) { predictor = predictorField.GetAsInt(0); if (predictor != 1 && predictor != 2) { throw new iText.IO.IOException(iText.IO.IOException.IllegalValueForPredictorInTiffFile); } if (predictor == 2 && bitsPerSample != 8) { throw new iText.IO.IOException(iText.IO.IOException._1BitSamplesAreNotSupportedForHorizontalDifferencingPredictor ).SetMessageParams(bitsPerSample); } } } if (compression == TIFFConstants.COMPRESSION_LZW) { lzwDecoder = new TIFFLZWDecoder(w, predictor, samplePerPixel); } int rowsLeft = h; ByteArrayOutputStream stream = null; ByteArrayOutputStream mstream = null; DeflaterOutputStream zip = null; DeflaterOutputStream mzip = null; if (extraSamples > 0) { mstream = new ByteArrayOutputStream(); mzip = new DeflaterOutputStream(mstream); } CCITTG4Encoder g4 = null; if (bitsPerSample == 1 && samplePerPixel == 1 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE) { g4 = new CCITTG4Encoder(w); } else { stream = new ByteArrayOutputStream(); if (compression != TIFFConstants.COMPRESSION_OJPEG && compression != TIFFConstants.COMPRESSION_JPEG) { zip = new DeflaterOutputStream(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 iText.IO.IOException(iText.IO.IOException.MissingTagsForOjpegCompression); } int jpegOffset = (int)dir.GetFieldAsLong(TIFFConstants.TIFFTAG_JPEGIFOFFSET); int jpegLength = (int)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, (int)s.Length() - jpegOffset)]; int posFilePointer = (int)s.GetPosition(); posFilePointer += jpegOffset; s.Seek(posFilePointer); s.ReadFully(jpeg); tiff.image.data = jpeg; tiff.image.SetOriginalType(ImageType.JPEG); JpegImageHelper.ProcessImage(tiff.image); tiff.jpegProcessing = true; } else { if (compression == TIFFConstants.COMPRESSION_JPEG) { if (size.Length > 1) { throw new iText.IO.IOException(iText.IO.IOException.CompressionJpegIsOnlySupportedWithASingleStripThisImageHas1Strips ).SetMessageParams(size.Length); } byte[] jpeg = new byte[(int)size[0]]; s.Seek(offset[0]); s.ReadFully(jpeg); // if quantization and/or Huffman tables are stored separately in the tiff, // we need to add them to the jpeg data TIFFField jpegtables = dir.GetField(TIFFConstants.TIFFTAG_JPEGTABLES); if (jpegtables != null) { byte[] temp = jpegtables.GetAsBytes(); int tableoffset = 0; int tablelength = temp.Length; // remove FFD8 from start if (temp[0] == (byte)0xFF && temp[1] == (byte)0xD8) { tableoffset = 2; tablelength -= 2; } // remove FFD9 from end if (temp[temp.Length - 2] == (byte)0xFF && temp[temp.Length - 1] == (byte)0xD9) { tablelength -= 2; } byte[] tables = new byte[tablelength]; Array.Copy(temp, tableoffset, tables, 0, tablelength); // TODO insert after JFIF header, instead of at the start byte[] jpegwithtables = new byte[jpeg.Length + tables.Length]; Array.Copy(jpeg, 0, jpegwithtables, 0, 2); Array.Copy(tables, 0, jpegwithtables, 2, tables.Length); Array.Copy(jpeg, 2, jpegwithtables, tables.Length + 2, jpeg.Length - 2); jpeg = jpegwithtables; } tiff.image.data = jpeg; tiff.image.SetOriginalType(ImageType.JPEG); JpegImageHelper.ProcessImage(tiff.image); tiff.jpegProcessing = true; if (photometric == TIFFConstants.PHOTOMETRIC_RGB) { tiff.image.SetColorTransform(0); } } 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: { FilterUtil.InflateData(im, outBuf); ApplyPredictor(outBuf, predictor, w, height, samplePerPixel); 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 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE) { g4.Fax4Encode(outBuf, height); } else { if (extraSamples > 0) { ProcessExtraSamples(zip, mzip, outBuf, samplePerPixel, bitsPerSample, w, height); } else { zip.Write(outBuf); } } rowsLeft -= rowsStrip; } if (bitsPerSample == 1 && samplePerPixel == 1 && photometric != TIFFConstants.PHOTOMETRIC_PALETTE) { RawImageHelper.UpdateRawImageParameters(tiff.image, w, h, false, RawImageData.CCITTG4, photometric == TIFFConstants .PHOTOMETRIC_MINISBLACK ? RawImageData.CCITT_BLACKIS1 : 0, g4.Close(), null); } else { zip.Dispose(); RawImageHelper.UpdateRawImageParameters(tiff.image, w, h, samplePerPixel - extraSamples, bitsPerSample, stream .ToArray()); tiff.image.SetDeflated(true); } } } tiff.image.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); IccProfile icc_prof = IccProfile.GetInstance(fd.GetAsBytes()); if (samplePerPixel - extraSamples == icc_prof.GetNumComponents()) { tiff.image.SetProfile(icc_prof); } } catch (Exception) { } } //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) { //there is no sense in >>> for unsigned char 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); } // Colormap components are supposed to go from 0 to 655535 but, // as usually, some tiff producers just put values from 0 to 255. // Let's check for these broken tiffs. bool colormapBroken = true; for (int k = 0; k < palette.Length; ++k) { if (palette[k] != 0) { colormapBroken = false; break; } } if (colormapBroken) { for (int k = 0; k < gColor; ++k) { palette[k * 3] = (byte)rgb[k]; palette[k * 3 + 1] = (byte)rgb[k + gColor]; palette[k * 3 + 2] = (byte)rgb[k + bColor]; } } Object[] indexed = new Object[4]; indexed[0] = "/Indexed"; indexed[1] = "/DeviceRGB"; indexed[2] = gColor - 1; indexed[3] = PdfEncodings.ConvertToString(palette, null); tiff.additional = new Dictionary <String, Object>(); tiff.additional.Put("ColorSpace", indexed); } } if (photometric == TIFFConstants.PHOTOMETRIC_MINISWHITE) { tiff.image.SetInverted(true); } if (rotation != 0) { tiff.image.SetRotation(rotation); } if (extraSamples > 0) { mzip.Dispose(); RawImageData mimg = (RawImageData)ImageDataFactory.CreateRawImage(null); RawImageHelper.UpdateRawImageParameters(mimg, w, h, 1, bitsPerSample, mstream.ToArray()); mimg.MakeMask(); mimg.SetDeflated(true); tiff.image.SetImageMask(mimg); } } catch (Exception) { throw new iText.IO.IOException(iText.IO.IOException.CannotGetTiffImageColor); } }
// 0 = n/a // 1 = byte // 2 = ascii // 3 = short // 4 = long // 5 = rational // 6 = sbyte // 7 = undefined // 8 = sshort // 9 = slong // 10 = srational // 11 = float // 12 = double /// <exception cref="System.IO.IOException"/> private void Initialize(RandomAccessFileOrArray stream) { long nextTagOffset = 0L; long maxOffset = stream.Length(); int i; int j; IFDOffset = stream.GetPosition(); numEntries = ReadUnsignedShort(stream); fields = new TIFFField[numEntries]; for (i = 0; i < numEntries && nextTagOffset < maxOffset; i++) { int tag = ReadUnsignedShort(stream); int type = ReadUnsignedShort(stream); int count = (int)ReadUnsignedInt(stream); bool processTag = true; // The place to return to to read the next tag nextTagOffset = stream.GetPosition() + 4; try { // If the tag data can't fit in 4 bytes, the next 4 bytes // contain the starting offset of the data if (count * sizeOfType[type] > 4) { long valueOffset = ReadUnsignedInt(stream); // bounds check offset for EOF if (valueOffset < maxOffset) { stream.Seek(valueOffset); } else { // bad offset pointer .. skip tag processTag = false; } } } catch (IndexOutOfRangeException) { // if the data type is unknown we should skip this TIFF Field processTag = false; } if (processTag) { fieldIndex.Put(tag, i); Object obj = null; switch (type) { case TIFFField.TIFF_BYTE: case TIFFField.TIFF_SBYTE: case TIFFField.TIFF_UNDEFINED: case TIFFField.TIFF_ASCII: { byte[] bvalues = new byte[count]; stream.ReadFully(bvalues, 0, count); if (type == TIFFField.TIFF_ASCII) { // Can be multiple strings int index = 0; int prevIndex = 0; IList <String> v = new List <String>(); while (index < count) { while (index < count && bvalues[index++] != 0) { } // When we encountered zero, means one string has ended v.Add(iText.IO.Util.JavaUtil.GetStringForBytes(bvalues, prevIndex, (index - prevIndex))); prevIndex = index; } count = v.Count; String[] strings = new String[count]; for (int c = 0; c < count; c++) { strings[c] = v[c]; } obj = strings; } else { obj = bvalues; } break; } case TIFFField.TIFF_SHORT: { char[] cvalues = new char[count]; for (j = 0; j < count; j++) { cvalues[j] = (char)ReadUnsignedShort(stream); } obj = cvalues; break; } case TIFFField.TIFF_LONG: { long[] lvalues = new long[count]; for (j = 0; j < count; j++) { lvalues[j] = ReadUnsignedInt(stream); } obj = lvalues; break; } case TIFFField.TIFF_RATIONAL: { long[][] llvalues = new long[count][]; for (j = 0; j < count; j++) { llvalues[j] = new long[2]; llvalues[j][0] = ReadUnsignedInt(stream); llvalues[j][1] = ReadUnsignedInt(stream); } obj = llvalues; break; } case TIFFField.TIFF_SSHORT: { short[] svalues = new short[count]; for (j = 0; j < count; j++) { svalues[j] = ReadShort(stream); } obj = svalues; break; } case TIFFField.TIFF_SLONG: { int[] ivalues = new int[count]; for (j = 0; j < count; j++) { ivalues[j] = ReadInt(stream); } obj = ivalues; break; } case TIFFField.TIFF_SRATIONAL: { int[][] iivalues = new int[count][]; for (j = 0; j < count; j++) { iivalues[j] = new int[2]; iivalues[j][0] = ReadInt(stream); iivalues[j][1] = ReadInt(stream); } obj = iivalues; break; } case TIFFField.TIFF_FLOAT: { float[] fvalues = new float[count]; for (j = 0; j < count; j++) { fvalues[j] = ReadFloat(stream); } obj = fvalues; break; } case TIFFField.TIFF_DOUBLE: { double[] dvalues = new double[count]; for (j = 0; j < count; j++) { dvalues[j] = ReadDouble(stream); } obj = dvalues; break; } default: { break; } } fields[i] = new TIFFField(tag, type, count, obj); } stream.Seek(nextTagOffset); } // Read the offset of the next IFD. try { nextIFDOffset = ReadUnsignedInt(stream); } catch (Exception) { // broken tiffs may not have this pointer nextIFDOffset = 0; } }
/// <summary>Reads the font data.</summary> /// <exception cref="System.IO.IOException"/> protected internal virtual void Process() { tables = new LinkedDictionary <String, int[]>(); if (ttcIndex >= 0) { int dirIdx = ttcIndex; if (dirIdx < 0) { if (fileName != null) { throw new iText.IO.IOException("the.font.index.for.1.must.be.positive").SetMessageParams(fileName); } else { throw new iText.IO.IOException("the.font.index.must.be.positive"); } } String mainTag = ReadStandardString(4); if (!mainTag.Equals("ttcf")) { if (fileName != null) { throw new iText.IO.IOException("1.is.not.a.valid.ttc.file").SetMessageParams(fileName); } else { throw new iText.IO.IOException("not.a.valid.ttc.file"); } } raf.SkipBytes(4); int dirCount = raf.ReadInt(); if (dirIdx >= dirCount) { if (fileName != null) { throw new iText.IO.IOException("the.font.index.for.1.must.be.between.0.and.2.it.was.3").SetMessageParams(fileName , dirCount - 1, dirIdx); } else { throw new iText.IO.IOException("the.font.index.must.be.between.0.and.1.it.was.2").SetMessageParams(dirCount - 1, dirIdx); } } raf.SkipBytes(dirIdx * 4); directoryOffset = raf.ReadInt(); } raf.Seek(directoryOffset); int ttId = raf.ReadInt(); if (ttId != 0x00010000 && ttId != 0x4F54544F) { if (fileName != null) { throw new iText.IO.IOException("1.is.not.a.valid.ttf.or.otf.file").SetMessageParams(fileName); } else { throw new iText.IO.IOException("not.a.valid.ttf.or.otf.file"); } } int num_tables = raf.ReadUnsignedShort(); raf.SkipBytes(6); for (int k = 0; k < num_tables; ++k) { String tag = ReadStandardString(4); raf.SkipBytes(4); int[] table_location = new int[2]; table_location[0] = raf.ReadInt(); table_location[1] = raf.ReadInt(); tables[tag] = table_location; } CheckCff(); ReadHheaTable(); ReadNameTable(); ReadHeadTable(); ReadOs_2Table(); ReadPostTable(); ReadGlyphWidths(); ReadCmapTable(); }