public void decompress8()

in java/org/libjpegturbo/turbojpeg/TJDecompressor.java [941:1015]
74 lines of code
23 McCabe index (conditional complexity)

  public void decompress8(BufferedImage dstImage) throws TJException {
    if (dstImage == null)
      throw new IllegalArgumentException("Invalid argument in decompress8()");

    if (yuvImage != null) {
      if (dstImage.getWidth() != yuvImage.getWidth() ||
          dstImage.getHeight() != yuvImage.getHeight())
        throw new IllegalArgumentException("BufferedImage dimensions do not match the dimensions of the source image.");
    } else {
      if (scalingFactor.getScaled(getJPEGWidth()) != dstImage.getWidth() ||
          scalingFactor.getScaled(getJPEGHeight()) != dstImage.getHeight())
        throw new IllegalArgumentException("BufferedImage dimensions do not match the scaled JPEG dimensions.");
    }
    int pixelFormat;  boolean intPixels = false;
    if (byteOrder == null)
      byteOrder = ByteOrder.nativeOrder();
    switch (dstImage.getType()) {
    case BufferedImage.TYPE_3BYTE_BGR:
      pixelFormat = TJ.PF_BGR;  break;
    case BufferedImage.TYPE_4BYTE_ABGR:
    case BufferedImage.TYPE_4BYTE_ABGR_PRE:
      pixelFormat = TJ.PF_XBGR;  break;
    case BufferedImage.TYPE_BYTE_GRAY:
      pixelFormat = TJ.PF_GRAY;  break;
    case BufferedImage.TYPE_INT_BGR:
      if (byteOrder == ByteOrder.BIG_ENDIAN)
        pixelFormat = TJ.PF_XBGR;
      else
        pixelFormat = TJ.PF_RGBX;
      intPixels = true;  break;
    case BufferedImage.TYPE_INT_RGB:
      if (byteOrder == ByteOrder.BIG_ENDIAN)
        pixelFormat = TJ.PF_XRGB;
      else
        pixelFormat = TJ.PF_BGRX;
      intPixels = true;  break;
    case BufferedImage.TYPE_INT_ARGB:
    case BufferedImage.TYPE_INT_ARGB_PRE:
      if (byteOrder == ByteOrder.BIG_ENDIAN)
        pixelFormat = TJ.PF_ARGB;
      else
        pixelFormat = TJ.PF_BGRA;
      intPixels = true;  break;
    default:
      throw new IllegalArgumentException("Unsupported BufferedImage format");
    }
    WritableRaster wr = dstImage.getRaster();
    if (intPixels) {
      SinglePixelPackedSampleModel sm =
        (SinglePixelPackedSampleModel)dstImage.getSampleModel();
      int stride = sm.getScanlineStride();
      DataBufferInt db = (DataBufferInt)wr.getDataBuffer();
      int[] buf = db.getData();
      if (yuvImage != null) {
        checkSubsampling();
        decodeYUV8(yuvImage.getPlanes(), yuvImage.getOffsets(),
                   yuvImage.getStrides(), buf, 0, 0, yuvImage.getWidth(),
                   stride, yuvImage.getHeight(), pixelFormat);
      } else {
        if (jpegBuf == null)
          throw new IllegalStateException(NO_ASSOC_ERROR);
        decompress8(jpegBuf, jpegBufSize, buf, 0, 0, stride, pixelFormat);
      }
    } else {
      ComponentSampleModel sm =
        (ComponentSampleModel)dstImage.getSampleModel();
      int pixelSize = sm.getPixelStride();
      if (pixelSize != TJ.getPixelSize(pixelFormat))
        throw new IllegalArgumentException("Inconsistency between pixel format and pixel size in BufferedImage");
      int pitch = sm.getScanlineStride();
      DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
      byte[] buf = db.getData();
      decompress8(buf, 0, 0, pitch, pixelFormat);
    }
  }