Examples of java.awt.image.RescaleOp.filter()

java.awt.image.RescaleOp.filter()
Rescales the source BufferedImage. If the color model in the source image is not the same as that in the destination image, the pixels will be converted in the destination. If the destination image is null, a BufferedImage will be created with the source ColorModel. An IllegalArgumentException may be thrown if the number of scaling factors/offsets in this object does not meet the restrictions stated in the class comments above, or if the source image has an IndexColorModel. @param src the BufferedImage to be filtered @param dst the destination for the filtering operation or null @return the filtered BufferedImage. @throws IllegalArgumentException if the ColorModelof src is an IndexColorModel, or if the number of scaling factors and offsets in this RescaleOp do not meet the requirements stated in the class comments.

    r.setSample(1, 3, 3, 90);
    
    RescaleOp op = new RescaleOp(new float[]{0.75f, 2.5f, -1f, 0f},
                                 new float[]{25f, 2f, 1f, 0f},
                                 null);
    BufferedImage dst = op.filter(img, null);
    WritableRaster dest = dst.getRaster();
    
    harness.check(dest.getSample(1, 1, 0), 32);     //rounded down from 32.5 
    harness.check(dest.getSample(1, 1, 1), 52);
    harness.check(dest.getSample(1, 1, 2), 0);

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    // Test mismatched arrays
    RescaleOp op = new RescaleOp(new float[]{1, 2, 3, 4}, new float[]{1, 2}, null);
    try
    {
      op.filter(img, null);
      harness.check(false);
    }
    catch (IllegalArgumentException ex)
    {
      harness.check(true);

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    // Only the first value from both arrays is read if the offsets array
    // has only one value
    op = new RescaleOp(new float[]{1, 2, 3, 4}, new float[]{1}, null);
    try
    {
      BufferedImage dst = op.filter(img, null);
      WritableRaster dest = dst.getRaster();
      harness.check(dest.getSample(1, 1, 0), 11);
      harness.check(dest.getSample(1, 1, 1), 21);
      harness.check(dest.getSample(1, 3, 0), 46);
      harness.check(dest.getSample(1, 3, 1), 61);

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    // Same with a single-length factors array
    op = new RescaleOp(new float[]{0.5f}, new float[]{2, 3, 4, 5}, null);
    try
    {
      BufferedImage dst = op.filter(img, null);
      WritableRaster dest = dst.getRaster();
      harness.check(dest.getSample(1, 1, 0), 7);
      harness.check(dest.getSample(1, 1, 1), 12);
      harness.check(dest.getSample(1, 3, 0), 24);
      harness.check(dest.getSample(1, 3, 1), 32);

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        // Copy non-RGB image to the RGB buffered image
        Graphics2D g = bimage.createGraphics();
        g.drawImage(backgroundImage, 0, 0, null);
        
        // Copy non-RGB image to the RGB buffered image
        this.backgroundImage = rescaleOp.filter(bimage, null);
        setOpaque(false);
        repaint();
    }


    /**

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            BufferedImage aux = new BufferedImage(this.imagenSinModificar.getWidth(),
                    this.imagenSinModificar.getHeight(),
                    this.imagenSinModificar.getType());


            //Aplicamos el filtro de brillo a la imagen transformada por los filtros
            rop.filter(this.imagenTransformada, aux);


            //Establecemos la nueva imagen a mostrar
            this.PanelTapiz.setImagen(aux);


            //Ponemos que se ha modificado la imagen

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        }


        // increase contrast
        try {
            RescaleOp rescaleOp = new RescaleOp(1.8f, -30, null);
            rescaleOp.filter(newImage, newImage);  // Source and destination are the same.
        } catch (Exception e) {
            throw new OcrException("Error rescaling OCR image", e);
        }


        return newImage;

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        Image img = getImage(stone);
        if (transp > 0) {
            scaleFactors_[3] = (255 - transp)/255;
            RescaleOp transparencyOp = new RescaleOp(scaleFactors_, OFFSETS, null);
            BufferedImage bufImg = ImageUtil.makeBufferedImage(getImage(stone));
            img = transparencyOp.filter(bufImg, null);
        }
        g2.drawImage(img, pos.x, pos.y, pieceSize, pieceSize , null);


        if (GameContext.getDebugMode() > 0 && inAtari) {
            g2.setColor(ATARI_COLOR);

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