Examples of java.awt.image.ImageFilter

java.awt.image.ImageFilter
This class implements a filter for the set of interface methods that are used to deliver data from an ImageProducer to an ImageConsumer. It is meant to be used in conjunction with a FilteredImageSource object to produce filtered versions of existing images. It is a base class that provides the calls needed to implement a "Null filter" which has no effect on the data being passed through. Filters should subclass this class and override the methods which deal with the data that needs to be filtered and modify it as necessary. @see FilteredImageSource @see ImageConsumer @version 1.32 11/17/05 @author Jim Graham


    /**
     * Get a rectangular region of the baseImage modified by an image filter.
     */
    Image getHighlight(int x, int y, int w, int h, ImageFilter filter) {
  ImageFilter cropfilter = new CropImageFilter(x, y, w, h);
  ImageProducer prod = new FilteredImageSource(baseImage.getSource(),
                 cropfilter);
  return makeImage(prod, filter, 0);
    }

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    public synchronized void addConsumer(ImageConsumer ic) {
        if (proxies == null) {
            proxies = new Hashtable();
        }
        if (!proxies.containsKey(ic)) {
            ImageFilter imgf = filter.getFilterInstance(ic);
            proxies.put(ic, imgf);
            src.addConsumer(imgf);
        }
    }

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     *
     * @see ImageConsumer
     */
    public synchronized void removeConsumer(ImageConsumer ic) {
        if (proxies != null) {
            ImageFilter imgf = (ImageFilter) proxies.get(ic);
            if (imgf != null) {
                src.removeConsumer(imgf);
                proxies.remove(ic);
                if (proxies.isEmpty()) {
                    proxies = null;

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     */
    public void startProduction(ImageConsumer ic) {
        if (proxies == null) {
            proxies = new Hashtable();
        }
        ImageFilter imgf = (ImageFilter) proxies.get(ic);
        if (imgf == null) {
            imgf = filter.getFilterInstance(ic);
            proxies.put(ic, imgf);
        }
        src.startProduction(imgf);

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     *
     * @see ImageConsumer
     */
    public void requestTopDownLeftRightResend(ImageConsumer ic) {
        if (proxies != null) {
            ImageFilter imgf = (ImageFilter) proxies.get(ic);
            if (imgf != null) {
                imgf.resendTopDownLeftRight(src);
            }
        }
    }

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    y += 3;
    x += 3;


    if(mIsGrayFilter && !mIsExpired && mProgram.isExpired()) {
      ImageFilter filter = new GrayFilter(true, 60);
      mScaledIcon.setImage(c.createImage(new FilteredImageSource(mScaledIcon.getImage().getSource(),filter)));
      mIsExpired = true;
    }


    if(c.getForeground().getAlpha() != 255) {
      ImageFilter filter = new RGBImageFilter() {
        public int filterRGB(int x, int y, int rgb) {
          if ((rgb & 0xff000000) != 0) {
            return (rgb & 0xffffff) | (c.getForeground().getAlpha() << 24);
          }
          return rgb;

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    public synchronized void addConsumer(ImageConsumer ic) {
        if (proxies == null) {
            proxies = new Hashtable();
        }
        if (!proxies.containsKey(ic)) {
            ImageFilter imgf = filter.getFilterInstance(ic);
            proxies.put(ic, imgf);
            src.addConsumer(imgf);
        }
    }

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     *
     * @see ImageConsumer
     */
    public synchronized void removeConsumer(ImageConsumer ic) {
        if (proxies != null) {
            ImageFilter imgf = (ImageFilter) proxies.get(ic);
            if (imgf != null) {
                src.removeConsumer(imgf);
                proxies.remove(ic);
                if (proxies.isEmpty()) {
                    proxies = null;

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     */
    public void startProduction(ImageConsumer ic) {
        if (proxies == null) {
            proxies = new Hashtable();
        }
        ImageFilter imgf = (ImageFilter) proxies.get(ic);
        if (imgf == null) {
            imgf = filter.getFilterInstance(ic);
            proxies.put(ic, imgf);
        }
        src.startProduction(imgf);

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     *
     * @see ImageConsumer
     */
    public void requestTopDownLeftRightResend(ImageConsumer ic) {
        if (proxies != null) {
            ImageFilter imgf = (ImageFilter) proxies.get(ic);
            if (imgf != null) {
                imgf.resendTopDownLeftRight(src);
            }
        }
    }

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