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

java.awt.image.ConvolveOp.filter()
Performs a convolution on BufferedImages. Each component of the source image will be convolved (including the alpha component, if present). 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. The IllegalArgumentException may be thrown if the source is the same as the destination. @param src the source BufferedImage to filter @param dst the destination BufferedImage for the filtered src @return the filtered BufferedImage @throws NullPointerException if src is null @throws IllegalArgumentException if src equalsdst @throws ImagingOpException if src cannot be filtered

        
        // 1.5 second vs 0.3 second
//        long start = System.currentTimeMillis();
        image = changeImageWidth(image, image.getWidth() / 2);
        ConvolveOp gaussianFilter = getGaussianBlurFilter(BLUR_SIZE, true);
        image = gaussianFilter.filter(image, null);
        gaussianFilter = getGaussianBlurFilter(BLUR_SIZE, false);
        image = gaussianFilter.filter(image, null);
        ColorTintFilter colorMixFilter = new ColorTintFilter(Color.WHITE, 0.4f);
        image = colorMixFilter.filter(image, null);
        image = changeImageWidth(image, image.getWidth() * 2);

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//        long start = System.currentTimeMillis();
        image = changeImageWidth(image, image.getWidth() / 2);
        ConvolveOp gaussianFilter = getGaussianBlurFilter(BLUR_SIZE, true);
        image = gaussianFilter.filter(image, null);
        gaussianFilter = getGaussianBlurFilter(BLUR_SIZE, false);
        image = gaussianFilter.filter(image, null);
        ColorTintFilter colorMixFilter = new ColorTintFilter(Color.WHITE, 0.4f);
        image = colorMixFilter.filter(image, null);
        image = changeImageWidth(image, image.getWidth() * 2);
//        System.out.println("time = " +
//                           ((System.currentTimeMillis() - start) / 1000.0f));

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    harness.checkPoint("testRaster1()");
    Raster src = createRasterA();
    WritableRaster dest = src.createCompatibleWritableRaster();
    Kernel k1 = new Kernel(1, 1, new float[] {1});
    ConvolveOp op = new ConvolveOp(k1, ConvolveOp.EDGE_ZERO_FILL, null);
    dest = op.filter(src, dest);
    harness.check(dest.getSample(0, 0, 0), 1);
    harness.check(dest.getSample(1, 0, 0), 2);
    harness.check(dest.getSample(2, 0, 0), 3);
    harness.check(dest.getSample(3, 0, 0), 4);
    harness.check(dest.getSample(4, 0, 0), 5);

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    WritableRaster dest = src.createCompatibleWritableRaster();
    Kernel k1 = new Kernel(3, 3, new float[] {0,0,0,
                                              0,1,0,
                                              0,0,0});
    ConvolveOp op = new ConvolveOp(k1, ConvolveOp.EDGE_ZERO_FILL, null);
    dest = op.filter(src, dest);
    harness.check(dest.getSample(0, 0, 0), 0);
    harness.check(dest.getSample(1, 0, 0), 0);
    harness.check(dest.getSample(2, 0, 0), 0);
    harness.check(dest.getSample(3, 0, 0), 0);
    harness.check(dest.getSample(4, 0, 0), 0);

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    WritableRaster dest = src.createCompatibleWritableRaster();
    Kernel k1 = new Kernel(3, 3, new float[] {0.1f,0.2f,0.3f,
                                              0.4f,0.5f,0.6f,
                                              0.7f,0.8f,0.9f});
    ConvolveOp op = new ConvolveOp(k1, ConvolveOp.EDGE_NO_OP, null);
    dest = op.filter(src, dest);
    harness.check(dest.getSample(0, 0, 0), 1);
    harness.check(dest.getSample(1, 0, 0), 2);
    harness.check(dest.getSample(2, 0, 0), 3);
    harness.check(dest.getSample(3, 0, 0), 4);
    harness.check(dest.getSample(4, 0, 0), 5);

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    ConvolveOp op = new ConvolveOp(k1, ConvolveOp.EDGE_ZERO_FILL, null);
    
    // Src and dst images cannot be the same
    try
    {
      op.filter(img, img);
      harness.check(false);
    }
    catch (IllegalArgumentException e)
    {
      harness.check(true);

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    // Src and dst are different sizes (allowed)
    BufferedImage dst = new BufferedImage(30, 40, BufferedImage.TYPE_USHORT_GRAY);
    try
    {
      op.filter(img, dst);
      harness.check(true);
    }
    catch (IllegalArgumentException e)
    {
      harness.check(false);

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    Kernel k1 = new Kernel(3, 3, new float[] {0.2f,0.3f,0.5f,
                                              0.4f,0.6f,0.7f,
                                              0.6f,0.9f,0.8f});
    ConvolveOp op = new ConvolveOp(k1, ConvolveOp.EDGE_ZERO_FILL, null);
    
    BufferedImage dst = op.filter(img, null);
    WritableRaster dest = dst.getRaster();
    
    harness.check(img.isAlphaPremultiplied(), false);
    harness.check(dst.isAlphaPremultiplied(), false);

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                                              0.6f,0.9f,0.8f});
    ConvolveOp op = new ConvolveOp(k1, ConvolveOp.EDGE_ZERO_FILL, null);
    
    BufferedImage dst = new BufferedImage(5, 5, BufferedImage.TYPE_INT_ARGB);
    
    dst = op.filter(img, dst);
    WritableRaster dest = dst.getRaster();
    
    harness.check(img.isAlphaPremultiplied(), true);
    harness.check(dst.isAlphaPremultiplied(), false);

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          new BufferedImage(
            image.getWidth(),
            image.getHeight(),
            image.getType());


        simpleBlur.filter(image, (BufferedImage) destination);


        //destination = destination.getSubimage(blurRadius/2, blurRadius/2, image.getWidth(), image.getHeight()); 
        g2 = (Graphics2D) destination.getGraphics();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, antialiasSetting);
        renderedImage = (RenderedImage) destination;

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