Examples of javax.media.jai.ImageLayout.unsetValid()

javax.media.jai.ImageLayout.unsetValid()
Clears selected bits of the valid bitmask. The valid bitmask is set to the logical 'and' of its prior value and the negation of the new mask value. This effectively subtracts from the set of valid parameters. @param mask the new mask value to be negated and 'and'-ed withthe prior value. @return a reference to this ImageLayout following the change.

    // a the possibility to expand the color model.
    if (strategy != ViewType.PHOTOGRAPHIC)
      targetHints.add(ImageUtilities.DONT_REPLACE_INDEX_COLOR_MODEL);
    else {
      targetHints.add(ImageUtilities.REPLACE_INDEX_COLOR_MODEL);
      layout.unsetValid(ImageLayout.COLOR_MODEL_MASK);
      layout.unsetValid(ImageLayout.SAMPLE_MODEL_MASK);
    }
  
    // /////////////////////////////////////////////////////////////////////
    //

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    if (strategy != ViewType.PHOTOGRAPHIC)
      targetHints.add(ImageUtilities.DONT_REPLACE_INDEX_COLOR_MODEL);
    else {
      targetHints.add(ImageUtilities.REPLACE_INDEX_COLOR_MODEL);
      layout.unsetValid(ImageLayout.COLOR_MODEL_MASK);
      layout.unsetValid(ImageLayout.SAMPLE_MODEL_MASK);
    }
  
    // /////////////////////////////////////////////////////////////////////
    //
    // Creating final grid coverage.

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         * Boolean.TRUE is not enough to force the operators to do an expansion. If we explicitly
         * provide an ImageLayout built with the source image where the CM and the SM are valid.
         * those will be employed overriding a the possibility to expand the color model.
         */
        if (ViewType.PHOTOGRAPHIC.equals(processingView)) {
            layout.unsetValid(ImageLayout.COLOR_MODEL_MASK | ImageLayout.SAMPLE_MODEL_MASK);
        }
        targetHints.put(JAI.KEY_IMAGE_LAYOUT, layout);


        ////////////////////////////////////////////////////////////////////////////////////////
        ////                                                                                ////

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        ImageLayout layout = null;
        // Check on the ImageLayout
        if (layoutOld != null) {
            layout = (ImageLayout) layoutOld.clone();
            // Unset the previous dimension parameters
            layout.unsetValid(ImageLayout.MIN_X_MASK);
            layout.unsetValid(ImageLayout.MIN_Y_MASK);
            layout.unsetValid(ImageLayout.WIDTH_MASK);
            layout.unsetValid(ImageLayout.HEIGHT_MASK);
        } else {
            // Create a new one

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        // Check on the ImageLayout
        if (layoutOld != null) {
            layout = (ImageLayout) layoutOld.clone();
            // Unset the previous dimension parameters
            layout.unsetValid(ImageLayout.MIN_X_MASK);
            layout.unsetValid(ImageLayout.MIN_Y_MASK);
            layout.unsetValid(ImageLayout.WIDTH_MASK);
            layout.unsetValid(ImageLayout.HEIGHT_MASK);
        } else {
            // Create a new one
            layout = new ImageLayout2();

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        if (layoutOld != null) {
            layout = (ImageLayout) layoutOld.clone();
            // Unset the previous dimension parameters
            layout.unsetValid(ImageLayout.MIN_X_MASK);
            layout.unsetValid(ImageLayout.MIN_Y_MASK);
            layout.unsetValid(ImageLayout.WIDTH_MASK);
            layout.unsetValid(ImageLayout.HEIGHT_MASK);
        } else {
            // Create a new one
            layout = new ImageLayout2();
        }

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            layout = (ImageLayout) layoutOld.clone();
            // Unset the previous dimension parameters
            layout.unsetValid(ImageLayout.MIN_X_MASK);
            layout.unsetValid(ImageLayout.MIN_Y_MASK);
            layout.unsetValid(ImageLayout.WIDTH_MASK);
            layout.unsetValid(ImageLayout.HEIGHT_MASK);
        } else {
            // Create a new one
            layout = new ImageLayout2();
        }

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        // /////////////////////////////////////////////////////////////////////
        if (needToTile) {


            // tiling the original image by providing a suitable layout
            final ImageLayout layout = getImageLayout(image);
            layout.unsetValid(ImageLayout.COLOR_MODEL_MASK | ImageLayout.SAMPLE_MODEL_MASK);


            // changing parameters related to the tiling
            final RenderingHints hints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, layout);


            // reading the image

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                RenderedImage image = coverage.getRenderedImage();
                if (forceTransparent) {
                    ImageWorker iw = new ImageWorker(image);
                    iw.forceComponentColorModel();
                    final ImageLayout tempLayout = new ImageLayout(image);
                    tempLayout.unsetValid(ImageLayout.COLOR_MODEL_MASK).unsetValid(
                            ImageLayout.SAMPLE_MODEL_MASK);
                    RenderedImage alpha = ConstantDescriptor.create(
                            Float.valueOf(image.getWidth()), Float.valueOf(image.getHeight()),
                            new Byte[] { Byte.valueOf((byte) 255) }, new RenderingHints(
                                    JAI.KEY_IMAGE_LAYOUT, tempLayout));

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        }
    }


    private RenderedImage addAlphaChannel(RenderedImage image) {
        final ImageLayout tempLayout= new ImageLayout(image);
        tempLayout.unsetValid(ImageLayout.COLOR_MODEL_MASK).unsetValid(ImageLayout.SAMPLE_MODEL_MASK);                    
        RenderedImage alpha = ConstantDescriptor.create(
                Float.valueOf( image.getWidth()),
                Float.valueOf(image.getHeight()),
                new Byte[] { Byte.valueOf((byte) 255) }, 
                new RenderingHints(JAI.KEY_IMAGE_LAYOUT,tempLayout));

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