Examples of javax.media.jai.BorderExtenderConstant

javax.media.jai.BorderExtenderConstant
A subclass of BorderExtender that implements border extension by filling all pixels outside of the image bounds with constant values. For example, the image:

A B C

D E F

G H I

if extended by adding two extra rows to the top and bottom and two extra columns on the left and right sides, would become:

X X X X X X X

X X X X X X X

X X A B C X X

X X D E F X X

X X G H I X X

X X X X X X X

X X X X X X X

where X is the constant fill value. The set of constants is clamped to the range and precision of the data type of the WritableRaster being filled. The number of constants used is given by the number of bands of the WritableRaster. If the WritableRaster has b bands, and there are c constants, constants 0 through b - 1 are used when b <= c. If there is only a single constant, then it is used for all bands. If b > c, an UnsupportedOperationException is thrown. @see BorderExtender

        // Extend the sources filling with the minimum possible value
        // on account of the threshold technique.
        this.sourceExtender =
            sourceExtensionConstant == 0.0 ?
            BorderExtender.createInstance(BorderExtender.BORDER_ZERO) :
            new BorderExtenderConstant(new double[] {sourceExtensionConstant});


        // Extends alpha or ROI data with zeros.
        if(sourceAlpha != null || sourceROI != null) {
            this.zeroExtender =
                BorderExtender.createInstance(BorderExtender.BORDER_ZERO);

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   * @param borderType 
   */
  public void addBorder(int thickness, Color color, int borderType)  throws ExpressionException{
    
    double colorArray[] = {color.getRed(), color.getGreen(), color.getBlue()};
    BorderExtender borderExtender = new BorderExtenderConstant(colorArray);
    
    ParameterBlock params = new ParameterBlock();
    params.addSource(image());
    params.add(thickness);
    params.add(thickness);

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          params.add(y);
          params.add(angle);
          params.add(interp);
          params.add(new double[] { 0.0 });
          RenderingHints hints= new RenderingHints(RenderingHints.KEY_INTERPOLATION,(RenderingHints.VALUE_INTERPOLATION_BICUBIC));
          hints.add(new RenderingHints(JAI.KEY_BORDER_EXTENDER,new BorderExtenderConstant(new double[] { 255.0 })));
          hints.add(new RenderingHints(JAI.KEY_REPLACE_INDEX_COLOR_MODEL,Boolean.TRUE));
          alpha = JAI.create("rotate", params, hints).getAsBufferedImage();
      }
      
      ParameterBlock params = new ParameterBlock();
      params.addSource(image());
      params.add(x);
      params.add(y);
      params.add(angle);
      params.add(interp);
      params.add(new double[] { 0.0 });
      BorderExtender extender= new BorderExtenderConstant(new double[] { 0.0 });
      RenderingHints hints= new RenderingHints(JAI.KEY_BORDER_EXTENDER, extender);
      hints.add(new RenderingHints(JAI.KEY_REPLACE_INDEX_COLOR_MODEL, Boolean.TRUE));
      image(JAI.create("rotate", params, hints).getAsBufferedImage());
      if (alpha != null)image(addAlpha(image(), alpha, 0, 0));
    }

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/*      */     case 5:
/*      */     default:
/*  361 */       sourceExtensionConstant = -1.797693134862316E+308D;
/*      */     }
/*      */ 
/*  366 */     this.sourceExtender = (sourceExtensionConstant == 0.0D ? BorderExtender.createInstance(0) : new BorderExtenderConstant(new double[] { sourceExtensionConstant }));
/*      */ 
/*  372 */     if ((sourceAlpha != null) || (sourceROI != null)) {
/*  373 */       this.zeroExtender = BorderExtender.createInstance(0);
/*      */     }
/*      */

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        default:
            sourceExtensionConstant = -Double.MAX_VALUE;
        }
        this.sourceExtender = sourceExtensionConstant == 0.0 ? BorderExtender
                .createInstance(BorderExtender.BORDER_ZERO)
                : new BorderExtenderConstant(new double[] { sourceExtensionConstant });


        roiAccessor = buildRoiAccessor(sourceROI);
        thresholdRoiAccessor = buildRoiAccessor(thresholdRoi);
    }

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        block.addSource(image);
        block.add(Math.abs(xPaddingSx));
        block.add(Math.abs(0));
        block.add(Math.abs(yPaddingTop));
        block.add(Math.abs(0));
        block.add(new BorderExtenderConstant(new double[]{Double.NaN}));
        RenderedOp paddedImage = JAI.create("Border", block);


        block = new ParameterBlock();
        block.addSource(paddedImage);
        block.add((float) -xPaddingSx);

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        //
        // We have yet to check for it usefulness: it might be more convenient
        // to check for region overlapping and return a nodata value by hand,
        // so to avoid problems with interpolation at source raster borders.
        //
        BorderExtender extender = new BorderExtenderConstant(new double[] { nodata });
        
        return new GridCoverage2DRIA(src, dst, vectorize(src.getRenderedImage()), imageLayout,
                null, false, extender, Interpolation.getInstance(Interpolation.INTERP_NEAREST),
                new double[] { nodata });
    }

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        //
        // We have yet to check for it usefulness: it might be more convenient
        // to check for region overlapping and return a nodata value by hand,
        // so to avoid problems with interpolation at source raster borders.
        //
        BorderExtender extender = new BorderExtenderConstant(new double[] { nodata });


        return new GridCoverage2DRIA(src, dst.getGridGeometry(), vectorize(src.getRenderedImage()), imageLayout,
                null, false, extender, Interpolation.getInstance(Interpolation.INTERP_NEAREST),
                new double[] { nodata });
    }

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        //
        // We have yet to check for it usefulness: it might be more convenient
        // to check for region overlapping and return a nodata value by hand,
        // so to avoid problems with interpolation at source raster borders.
        //
        BorderExtender extender = new BorderExtenderConstant(new double[] { nodata });


        return new GridCoverage2DRIA(src, dst, vectorize(src.getRenderedImage()), imageLayout,
                null, false, extender, Interpolation.getInstance(Interpolation.INTERP_NEAREST),
                new double[] { nodata });
    }

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        //
        // We have yet to check for it usefulness: it might be more convenient
        // to check for region overlapping and return a nodata value by hand,
        // so to avoid problems with interpolation at source raster borders.
        //
        BorderExtender extender = new BorderExtenderConstant(new double[] { nodata });
        
        // add tile caching to the mix
        final RenderingHints hints= new RenderingHints(JAI.KEY_TILE_CACHE, JAI.getDefaultInstance().getTileCache());
        return new GridCoverage2DRIA(src, dstGridGeometry, vectorize(src.getRenderedImage()), imageLayout,
                hints, false, extender, Interpolation.getInstance(Interpolation.INTERP_NEAREST),

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