/// <summary>
/// Decompresses JPEG image to any image described as ICompressDestination
/// </summary>
/// <param name="jpeg">Stream with JPEG data</param>
/// <param name="destination">Stream for output of compressed JPEG</param>
public void Decompress(Stream jpeg, IDecompressDestination destination)
{
if (jpeg == null)
{
throw new ArgumentNullException("jpeg");
}
if (destination == null)
{
throw new ArgumentNullException("destination");
}
beforeDecompress(jpeg);
// Start decompression
m_decompressor.jpeg_start_decompress();
LoadedImageAttributes parameters = getImageParametersFromDecompressor();
destination.SetImageAttributes(parameters);
destination.BeginWrite();
/* Process data */
while (m_decompressor.Output_scanline < m_decompressor.Output_height)
{
byte[][] row = jpeg_common_struct.AllocJpegSamples(m_decompressor.Output_width * m_decompressor.Output_components, 1);
m_decompressor.jpeg_read_scanlines(row, 1);
destination.ProcessPixelsRow(row[0]);
}
destination.EndWrite();
// Finish decompression and release memory.
m_decompressor.jpeg_finish_decompress();
}
/// <summary>
/// Decompresses JPEG image to any image described as ICompressDestination
/// </summary>
/// <param name="jpeg">Stream with JPEG data</param>
/// <param name="destination">Stream for output of compressed JPEG</param>
public void Decompress(Stream jpeg, IDecompressDestination destination)
{
if (jpeg is null)
{
throw new ArgumentNullException(nameof(jpeg));
}
if (destination is null)
{
throw new ArgumentNullException(nameof(destination));
}
beforeDecompress(jpeg);
// Start decompression
ClassicDecompressor.JpegStartDecompress();
var parameters = getImageParametersFromDecompressor();
destination.SetImageAttributes(parameters);
destination.BeginWrite();
/* Process data */
while (ClassicDecompressor.Output_scanline < ClassicDecompressor.Output_height)
{
var row = JpegCommonStruct.AllocJpegSamples(ClassicDecompressor.Output_width * ClassicDecompressor.Output_components, 1);
ClassicDecompressor.JpegReadScanlines(row, 1);
destination.ProcessPixelsRow(row[0]);
}
destination.EndWrite();
// Finish decompression and release memory.
ClassicDecompressor.JpegFinishDecompress();
}
private void createFromStream(Stream imageData, IDecompressDestination dst)
{
if (imageData == null)
{
throw new ArgumentNullException("imageData");
}
if (isCompressed(imageData))
{
m_compressedData = Utils.CopyStream(imageData);
decompress(dst);
}
else
{
throw new NotImplementedException("JpegImage.createFromStream(Stream)");
}
}
/// <summary>
/// Decompresses JPEG image to any image described as ICompressDestination
/// </summary>
/// <param name="jpeg">Stream with JPEG data</param>
/// <param name="destination">Stream for output of compressed JPEG</param>
public void Decompress(Stream jpeg, IDecompressDestination destination)
{
if (jpeg == null)
throw new ArgumentNullException("jpeg");
if (destination == null)
throw new ArgumentNullException("destination");
beforeDecompress(jpeg);
// Start decompression
m_decompressor.jpeg_start_decompress();
LoadedImageAttributes parameters = getImageParametersFromDecompressor();
destination.SetImageAttributes(parameters);
destination.BeginWrite();
/* Process data */
while (m_decompressor.Output_scanline < m_decompressor.Output_height)
{
byte[][] row = jpeg_common_struct.AllocJpegSamples(m_decompressor.Output_width * m_decompressor.Output_components, 1);
m_decompressor.jpeg_read_scanlines(row, 1);
destination.ProcessPixelsRow(row[0]);
}
destination.EndWrite();
// Finish decompression and release memory.
m_decompressor.jpeg_finish_decompress();
}
/// <summary>
/// Creates <see cref="JpegImage"/> from stream with an arbitrary image data
/// </summary>
/// <param name="imageData">Stream containing bytes of image in
/// arbitrary format (BMP, Jpeg, GIF, PNG, TIFF, e.t.c)</param>
public JpegImage(Stream imageData, IDecompressDestination dst)
{
//new DecompressorToJpegImage(this)
createFromStream(imageData, dst);
}
private void decompress(IDecompressDestination dst)
{
Jpeg jpeg = new Jpeg();
jpeg.Decompress(compressedData, dst);
}
