Examples of java.awt.image.renderable.ParameterBlock

java.awt.image.renderable.ParameterBlock
A ParameterBlock encapsulates all the information about sources and parameters (Objects) required by a RenderableImageOp, or other classes that process images.
Although it is possible to place arbitrary objects in the source Vector, users of this class may impose semantic constraints such as requiring all sources to be RenderedImages or RenderableImage. ParameterBlock itself is merely a container and performs no checking on source or parameter types.
All parameters in a ParameterBlock are objects; convenience add and set methods are available that take arguments of base type and construct the appropriate subclass of Number (such as Integer or Float). Corresponding get methods perform a downward cast and have return values of base type; an exception will be thrown if the stored values do not have the correct type. There is no way to distinguish between the results of "short s; add(s)" and "add(new Short(s))".
Note that the get and set methods operate on references. Therefore, one must be careful not to share references between ParameterBlocks when this is inappropriate. For example, to create a new ParameterBlock that is equal to an old one except for an added source, one might be tempted to write:
```
 ParameterBlock addSource(ParameterBlock pb, RenderableImage im) { ParameterBlock pb1 = new ParameterBlock(pb.getSources()); pb1.addSource(im); return pb1; } 
```
This code will have the side effect of altering the original ParameterBlock, since the getSources operation returned a reference to its source Vector. Both pb and pb1 share their source Vector, and a change in either is visible to both.
A correct way to write the addSource function is to clone the source Vector:
```
 ParameterBlock addSource (ParameterBlock pb, RenderableImage im) { ParameterBlock pb1 = new ParameterBlock(pb.getSources().clone()); pb1.addSource(im); return pb1; } 
```
The clone method of ParameterBlock has been defined to perform a clone of both the source and parameter Vectors for this reason. A standard, shallow clone is available as shallowClone.
The addSource, setSource, add, and set methods are defined to return 'this' after adding their argument. This allows use of syntax like:
```
 ParameterBlock pb = new ParameterBlock(); op = new RenderableImageOp("operation", pb.add(arg1).add(arg2)); 
```


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


            ParameterBlock pb = op.getParameterBlock();


            // Retrieve the rendered source image and its ROI.
            RenderedImage src = pb.getRenderedSource(0);
            Object property = src.getProperty("ROI");
            if (property == null ||
                property.equals(java.awt.Image.UndefinedProperty) ||
                !(property instanceof ROI)) {
                return java.awt.Image.UndefinedProperty;
            }
            ROI srcROI = (ROI)property;


            // Retrieve the Interpolation object.
            Interpolation interp = (Interpolation)pb.getObjectParameter(2);


            // Determine the effective source bounds.
            Rectangle srcBounds = null;
            PlanarImage dst = op.getRendering();
            if (dst instanceof GeometricOpImage &&
                ((GeometricOpImage)dst).getBorderExtender() == null) {
                srcBounds =
                    new Rectangle(src.getMinX() + interp.getLeftPadding(),
                                  src.getMinY() + interp.getTopPadding(),
                                  src.getWidth() - interp.getWidth() + 1,
                                  src.getHeight() - interp.getHeight() + 1);
            } else {
                srcBounds = new Rectangle(src.getMinX(),
            src.getMinY(),
            src.getWidth(),
            src.getHeight());
            }


            // If necessary, clip the ROI to the effective source bounds.
            if(!srcBounds.contains(srcROI.getBounds())) {
                srcROI = srcROI.intersect(new ROIShape(srcBounds));
            }


            // Retrieve the translation values.
            float tx = pb.getFloatParameter(0);
            float ty = pb.getFloatParameter(1);


            // Create a transform representing the translation.
            AffineTransform transform =
                AffineTransform.getTranslateInstance((double) tx,
                                                     (double) ty);

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                                                      transform);
                    } catch(NoninvertibleTransformException nite) {
                        return intermediateImage;
                    }
    } else {
        ParameterBlock pbScale = new ParameterBlock();
        pbScale.addSource(trans);
        pbScale.add(0F);
        pbScale.add(0F);
        pbScale.add(rotMinX - imMinX);
        pbScale.add(rotMinY - imMinY);
        pbScale.add(interp);
        PlanarImage intermediateImage =
                        JAI.create("scale", pbScale, hints).getRendering();
                    try {
                        return new PointMapperOpImage(intermediateImage,
                                                      hints,

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


            ParameterBlock pb = op.getParameterBlock();


            // Retrieve the rendered source image and its ROI.
            RenderedImage src = pb.getRenderedSource(0);
            Object property = src.getProperty("ROI");
            if (property == null ||
                property.equals(java.awt.Image.UndefinedProperty) ||
                !(property instanceof ROI)) {
                return java.awt.Image.UndefinedProperty;
            }
            ROI srcROI = (ROI)property;


            // Retrieve the Interpolation object.
            Interpolation interp = (Interpolation)pb.getObjectParameter(4);


            // Determine the effective source bounds.
            Rectangle srcBounds = null;
            PlanarImage dst = op.getRendering();
            if (dst instanceof GeometricOpImage &&
                ((GeometricOpImage)dst).getBorderExtender() == null) {
                srcBounds =
                    new Rectangle(src.getMinX() + interp.getLeftPadding(),
                                  src.getMinY() + interp.getTopPadding(),
                                  src.getWidth() - interp.getWidth() + 1,
                                  src.getHeight() - interp.getHeight() + 1);
            } else {
                srcBounds = new Rectangle(src.getMinX(),
            src.getMinY(),
            src.getWidth(),
            src.getHeight());
            }


            // If necessary, clip the ROI to the effective source bounds.
            if(!srcBounds.contains(srcROI.getBounds())) {
                srcROI = srcROI.intersect(new ROIShape(srcBounds));
            }


            // Retrieve the scale factors and translation values.
            float sx = pb.getFloatParameter(0);
            float sy = pb.getFloatParameter(1);
            float tx = pb.getFloatParameter(2);
            float ty = pb.getFloatParameter(3);


            // Create an equivalent transform.
            AffineTransform transform =
                new AffineTransform(sx, 0.0, 0.0, sy, tx, ty);

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            throw new IllegalArgumentException
                (JaiI18N.getString("SubsampleAveragePropertyGenerator4"));
        }


        if (name.equals("roi")) {
            ParameterBlock pb = op.getParameterBlock();


            // Retrieve the rendered source image and its ROI.
            PlanarImage src = (PlanarImage)pb.getRenderedSource(0);
            Object property = src.getProperty("ROI");
            if (property == null ||
                property.equals(java.awt.Image.UndefinedProperty) ||
                !(property instanceof ROI)) {
                return null;
            }
            ROI srcROI = (ROI)property;


            // Determine the effective source bounds.
            Rectangle srcBounds = null;
            PlanarImage dst = op.getRendering();
            if(dst instanceof GeometricOpImage &&
               ((GeometricOpImage)dst).getBorderExtender() == null) {
                GeometricOpImage geomIm = (GeometricOpImage)dst;
                Interpolation interp = geomIm.getInterpolation();
                srcBounds =
                    new Rectangle(src.getMinX() + interp.getLeftPadding(),
                                  src.getMinY() + interp.getTopPadding(),
                                  src.getWidth() - interp.getWidth() + 1,
                                  src.getHeight() - interp.getHeight() + 1);
            } else {
                srcBounds = src.getBounds();
            }


            // If necessary, clip the ROI to the effective source bounds.
            if(!srcBounds.contains(srcROI.getBounds())) {
                srcROI = srcROI.intersect(new ROIShape(srcBounds));
            }


            // Retrieve the scale factors and translation values.
            double sx = pb.getDoubleParameter(0);
            double sy = pb.getDoubleParameter(1);


            // Create an equivalent transform.
            AffineTransform transform =
                new AffineTransform(sx, 0.0, 0.0, sy, 0, 0);

View Full Code Here


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


            ParameterBlock pb = op.getParameterBlock();


            // Retrieve the rendered source image and its ROI.
            RenderedImage src = pb.getRenderedSource(0);


            Object property = src.getProperty("ROI");
            if (property == null ||
                property.equals(java.awt.Image.UndefinedProperty) ||
                !(property instanceof ROI)) {
                return java.awt.Image.UndefinedProperty;
            }
            ROI srcROI = (ROI)property;


            // Determine the effective source bounds.
            Rectangle srcBounds = new Rectangle(src.getMinX(),
            src.getMinY(),
            src.getWidth(),
            src.getHeight());


            // If necessary, clip the ROI to the effective source bounds.
            if(!srcBounds.contains(srcROI.getBounds())) {
                srcROI = srcROI.intersect(new ROIShape(srcBounds));
            }


            // Retrieve the scale factors and translation values.
            float sx = pb.getFloatParameter(0);
            float sy = pb.getFloatParameter(1);


            // Create an equivalent transform.
            AffineTransform transform =
                new AffineTransform(sx, 0.0, 0.0, sy, 0.0, 0.0);

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                      RenderingHints hints) {
        super(new ImageLayout(), null, null);


        if(pb == null) {
            // Ensure that the PB is non-null.
            pb = new ParameterBlock();
        } else {
            // Clone the PB per the doc.
            pb = (ParameterBlock)pb.clone();
        }

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                }
            }
        }


        nodeSupport.setParameterBlock(pb == null ?
                                      new ParameterBlock() :
                                      (ParameterBlock)pb.clone());
    }

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                            }
                        }
                    }
                }
            } else { // not op name or registry change nor RenderingChangeEvent
                ParameterBlock oldPB = null;
                ParameterBlock newPB = null;


                boolean checkInvalidRegion = false;
                if(propName.equals("parameterblock")) {
                    oldPB = (ParameterBlock)evt.getOldValue();
                    newPB = (ParameterBlock)evt.getNewValue();
                    checkInvalidRegion = true;
                } else if(propName.equals("sources")) {
                    // Replace source(s)
                    Vector params =
                        nodeSupport.getParameterBlock().getParameters();
                    oldPB = new ParameterBlock((Vector)evt.getOldValue(),
                                               params);
                    newPB = new ParameterBlock((Vector)evt.getNewValue(),
                                               params);
                    checkInvalidRegion = true;
                } else if(propName.equals("parameters")) {
                    // Replace parameter(s)
                    oldPB = new ParameterBlock(nodeSources,
                                               (Vector)evt.getOldValue());
                    newPB = new ParameterBlock(nodeSources,
                                               (Vector)evt.getNewValue());
                    checkInvalidRegion = true;
                } else if(propName.equals("renderinghints")) {
                    oldPB = newPB = nodeSupport.getParameterBlock();
                    checkInvalidRegion = true;
                } else if(evt instanceof CollectionChangeEvent) {
                    // Event from a CollectionOp source.


                    // Replace appropriate source.
                    int collectionIndex = nodeSources.indexOf(evtSrc);
                    Vector oldSources = (Vector)nodeSources.clone();
                    Vector newSources = (Vector)nodeSources.clone();
                    oldSources.set(collectionIndex, evt.getOldValue());
                    newSources.set(collectionIndex, evt.getNewValue());


                    Vector params =
                        nodeSupport.getParameterBlock().getParameters();


                    oldPB = new ParameterBlock(oldSources, params);
                    newPB = new ParameterBlock(newSources, params);


                    checkInvalidRegion = true;
                }


                if(checkInvalidRegion) {

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     * rendered.
     *
     * @since JAI 1.1
     */
    public synchronized void setParameters(Vector parameters) {
        ParameterBlock pb =
            (ParameterBlock)nodeSupport.getParameterBlock().clone();
        pb.setParameters(parameters);
        nodeSupport.setParameterBlock(pb);
    }

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     *
     * @param param The parameter, as an <code>Object</code>.
     * @param index The index of the parameter.
     */
    public synchronized void setParameter(Object param, int index) {
        ParameterBlock pb =
            (ParameterBlock)nodeSupport.getParameterBlock().clone();
        pb.set(param, index);
        nodeSupport.setParameterBlock(pb);
    }

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