java.awt.image.renderable.ParameterBlock#getRenderedSource()源码实例Demo

@Override
public Object getProperty(final String name, final Object opNode) {
  validate(name, opNode);

  if ((opNode instanceof RenderedOp) && name.equalsIgnoreCase("sourceThreshold")) {
    final RenderedOp op = (RenderedOp) opNode;

    final ParameterBlock pb = op.getParameterBlock();

    // Retrieve the rendered source image and its ROI.
    final RenderedImage src = pb.getRenderedSource(0);
    final Object property = src.getProperty("sourceThreshold");
    if (property != null) {
      return property;
    } // Getting the Threshold to use
    final double threshold =
        CoverageUtilities.getMosaicThreshold(src.getSampleModel().getDataType());
    // Setting the Threshold object for the mosaic
    return new double[][] {{threshold}};
  }
  return java.awt.Image.UndefinedProperty;
}
 

/** Creates an BinarizeOpImage with a given ParameterBlock */

  public RenderedImage create(ParameterBlock paramBlock, 
			      RenderingHints renderingHints)
  {
    RenderedImage img = paramBlock.getRenderedSource(0);

    ImageLayout il = new ImageLayout(img);
    ColorModel cm = new IndexColorModel(1, 2, bwColors, bwColors, bwColors);
    SampleModel sm = new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE,
						     img.getWidth(),
						     img.getHeight(),
						     1);

    il.setColorModel(cm);
    il.setSampleModel(sm);

    return new BinarizeOpImage(paramBlock.getRenderedSource(0),
			       renderingHints,
			       il,
			       (Integer)paramBlock.getObjectParameter(0));
  }
 

/**
 * Creates a new instance of warp operator according to the warp object and interpolation method.
 *
 * @param paramBlock The warp and interpolation objects.
 */
@Override
public RenderedImage create(final ParameterBlock paramBlock, final RenderingHints renderHints) {
  final Interpolation interp = (Interpolation) paramBlock.getObjectParameter(1);
  if ((interp instanceof InterpolationNearest)
      || (interp instanceof javax.media.jai.InterpolationNearest)) {
    // Get ImageLayout from renderHints if any.
    final ImageLayout layout = RIFUtil.getImageLayoutHint(renderHints);

    RenderedImage source = paramBlock.getRenderedSource(0);
    final Warp warp = (Warp) paramBlock.getObjectParameter(0);
    final double[] backgroundValues = (double[]) paramBlock.getObjectParameter(2);

    ROI roi = null;
    final Object roi_ = paramBlock.getObjectParameter(3);
    if (roi_ instanceof ROI) {
      roi = (ROI) roi_;
      final PlanarImage temp = PlanarImage.wrapRenderedImage(source);
      temp.setProperty("ROI", roi);
      source = temp;
    }
    Range noData = (Range) paramBlock.getObjectParameter(4);
    noData = RangeFactory.convert(noData, source.getSampleModel().getDataType());
    return new WarpNearestOpImage(
        source,
        renderHints,
        layout,
        warp,
        interp,
        roi,
        noData,
        backgroundValues);
  }
  return super.create(paramBlock, renderHints);
}
 

/** Creates an RLSAOpImage with a given ParameterBlock */

  public RenderedImage create(ParameterBlock paramBlock, 
			      RenderingHints renderingHints)
  {
    return new SkeletonOpImage(paramBlock.getRenderedSource(0),
			       renderingHints,
			       new ImageLayout(paramBlock.getRenderedSource(0)),
			       (Boolean) paramBlock.getObjectParameter(0));
  }
 

/** Creates a BlackOrOpImage with a given ParameterBlock */

  public RenderedImage create(ParameterBlock paramBlock, 
			      RenderingHints renderingHints)
  {
    return new BlackOrOpImage(paramBlock.getRenderedSource(0),
			      paramBlock.getRenderedSource(1),
			      new ImageLayout(paramBlock.getRenderedSource(0)),
			      renderingHints,
			      true);
  }
 

/** Creates an PowerOpImage with a given ParameterBlock */

  public RenderedImage create(ParameterBlock paramBlock, 
			      RenderingHints renderingHints)
  {
    return new PowerOpImage(paramBlock.getRenderedSource(0),
			    renderingHints,
			    new ImageLayout(paramBlock.getRenderedSource(0)),
			    (Double) paramBlock.getObjectParameter(0));
  }
 

/** Invokes the operator with a given ParameterBlock */

  public RenderedImage create(ParameterBlock paramBlock, 
			      RenderingHints renderHints)
  {
    return new CCOpImage(paramBlock.getRenderedSource(0),
			 (Rectangle) paramBlock.getObjectParameter(0));
  }
 

/** Creates an RLSAOpImage with a given ParameterBlock */

  public RenderedImage create(ParameterBlock paramBlock, 
			      RenderingHints renderHints)
  {
    return new RLSAOpImage(paramBlock.getRenderedSource(0),
			   null,
			   new ImageLayout(paramBlock.getRenderedSource(0)),
			   (Integer) paramBlock.getObjectParameter(0),
			   (Integer) paramBlock.getObjectParameter(1));
  }
 

public RenderedImage create(ParameterBlock paramBlock, 
	      RenderingHints renderHints)
{
  if (!validateParameters(paramBlock)) { 
    return null;
  } 
  
  return new ProjectionProfileOpImage
    (paramBlock.getRenderedSource(0),
     (Rectangle) paramBlock.getObjectParameter(0));
}