public void setSourceImage()

in java/org/libjpegturbo/turbojpeg/TJCompressor.java [287:354]
66 lines of code
24 McCabe index (conditional complexity)

  public void setSourceImage(BufferedImage srcImage, int x, int y, int width,
                             int height) throws TJException {
    if (handle == 0) init();
    if (srcImage == null || x < 0 || y < 0 || width < 0 || height < 0)
      throw new IllegalArgumentException("Invalid argument in setSourceImage()");
    srcX = x;
    srcY = y;
    srcWidth = (width == 0) ? srcImage.getWidth() : width;
    srcHeight = (height == 0) ? srcImage.getHeight() : height;
    if (x + width > srcImage.getWidth() || y + height > srcImage.getHeight())
      throw new IllegalArgumentException("Compression region exceeds the bounds of the source image");

    int pixelFormat;
    boolean intPixels = false;
    if (byteOrder == null)
      byteOrder = ByteOrder.nativeOrder();
    switch (srcImage.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:
    case BufferedImage.TYPE_INT_ARGB:
    case BufferedImage.TYPE_INT_ARGB_PRE:
      if (byteOrder == ByteOrder.BIG_ENDIAN)
        pixelFormat = TJ.PF_XRGB;
      else
        pixelFormat = TJ.PF_BGRX;
      intPixels = true;  break;
    default:
      throw new IllegalArgumentException("Unsupported BufferedImage format");
    }
    srcPixelFormat = pixelFormat;

    WritableRaster wr = srcImage.getRaster();
    if (intPixels) {
      SinglePixelPackedSampleModel sm =
        (SinglePixelPackedSampleModel)srcImage.getSampleModel();
      srcStride = sm.getScanlineStride();
      DataBufferInt db = (DataBufferInt)wr.getDataBuffer();
      srcBufInt = db.getData();
      srcBuf8 = null;
      srcBuf12 = null;
      srcBuf16 = null;
    } else {
      ComponentSampleModel sm =
        (ComponentSampleModel)srcImage.getSampleModel();
      int pixelSize = sm.getPixelStride();
      if (pixelSize != TJ.getPixelSize(pixelFormat))
        throw new IllegalArgumentException("Inconsistency between pixel format and pixel size in BufferedImage");
      srcPitch = sm.getScanlineStride();
      DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
      srcBuf8 = db.getData();
      srcBuf12 = null;
      srcBuf16 = null;
      srcBufInt = null;
    }
    srcYUVImage = null;
  }