void UuidHandler(AtomCallbackArgs a) { switch (a.TypeString) { case "CMT1": { var handler = new QuickTimeTiffHandler <ExifIfd0Directory>(directories); var reader = new IndexedSeekingReader(a.Stream, (int)a.Reader.Position); TiffReader.ProcessTiff(reader, handler); break; } case "CMT2": { var handler = new QuickTimeTiffHandler <ExifSubIfdDirectory>(directories); var reader = new IndexedSeekingReader(a.Stream, (int)a.Reader.Position); TiffReader.ProcessTiff(reader, handler); break; } case "CMT3": { var handler = new QuickTimeTiffHandler <CanonMakernoteDirectory>(directories); var reader = new IndexedSeekingReader(a.Stream, (int)a.Reader.Position); TiffReader.ProcessTiff(reader, handler); break; } case "CMT4": { var handler = new QuickTimeTiffHandler <GpsDirectory>(directories); var reader = new IndexedSeekingReader(a.Stream, (int)a.Reader.Position); TiffReader.ProcessTiff(reader, handler); break; } } }
public DirectoryList Extract(Stream inputStream) { IndexedReader reader = new IndexedSeekingReader(inputStream); var directory = new EpsDirectory(); var epsDirectories = new List <Directory>() { directory }; // 0xC5D0D3C6 signifies an EPS Header block which contains 32-bytes of basic information // 0x25215053 (%!PS) signifies an EPS File and leads straight into the PostScript int startingPosition = (int)inputStream.Position; switch (reader.GetInt32(0)) { case unchecked ((int)0xC5D0D3C6): reader = reader.WithByteOrder(isMotorolaByteOrder: false); int postScriptOffset = reader.GetInt32(4); int postScriptLength = reader.GetInt32(8); int wmfOffset = reader.GetInt32(12); int wmfSize = reader.GetInt32(16); int tifOffset = reader.GetInt32(20); int tifSize = reader.GetInt32(24); //int checkSum = reader.getInt32(28); // Get Tiff/WMF preview data if applicable if (tifSize != 0) { directory.Set(EpsDirectory.TagTiffPreviewSize, tifSize); directory.Set(EpsDirectory.TagTiffPreviewOffset, tifOffset); // Get Tiff metadata try { ByteArrayReader byteArrayReader = new(reader.GetBytes(tifOffset, tifSize)); TiffReader.ProcessTiff(byteArrayReader, new PhotoshopTiffHandler(epsDirectories)); } catch (TiffProcessingException ex) { directory.AddError("Unable to process TIFF data: " + ex.Message); } } else if (wmfSize != 0) { directory.Set(EpsDirectory.TagWmfPreviewSize, wmfSize); directory.Set(EpsDirectory.TagWmfPreviewOffset, wmfOffset); } // TODO avoid allocating byte array here -- read directly from InputStream Extract(directory, epsDirectories, new SequentialByteArrayReader(reader.GetBytes(postScriptOffset, postScriptLength))); break; case 0x25215053: inputStream.Position = startingPosition; Extract(directory, epsDirectories, new SequentialStreamReader(inputStream)); break; default: directory.AddError("File type not supported."); break; } return(epsDirectories); }