Examples of javax.media.jai.EnumeratedParameter

javax.media.jai.EnumeratedParameter
This class provides a mechanism by which enumerated parameters may be added to subclasses of OperationDescriptorImpl while retaining the ability to perform introspection on the allowable range of values of the enumeration. An example of an enumerated parameter is the type parameter of the "Transpose" operation which is defined in TransposeDescriptor to accept only the values defined by the FLIP_* and ROTATE_* fields of the descriptor.
This class may be used to create enumerated parameters in an OperationDescriptor as follows:
- For each constrained-value parameter create a final class extending EnumeratedParameter. This class should consist of only a package private constructor with a single String parameter called name and a single statement invoking the superclass constructor with name as the parameter.
- Define the class of the parameter in question to be the subclass of EnumeratedParameter which was created for it in in the previous step.
- For each possible value of the parameter, define in the OperationDescriptor of the operator a public static final field of type equal to the class defined in the first step. Each field should be assigned an instance of the subclass defined in the first step. The name and value used for each of these EnumeratedParameter subclass instances should be distinct for each distinct field or an error will occur.
With respect to TransposeDescriptor, the three steps above would be to 1) create a final class TransposeType in the javax.media.jai.operator package; 2) define the type of the "type" parameter as TransposeType.class; and 3) define a static final field of class TransposeType for each of the enumerated values with each field being initialized to an instance of TransposeType with name equal to the name of the field and value to its integral (enumerated) value. @see OperationDescriptorImpl @see javax.media.jai.operator.TransposeDescriptor @since JAI 1.1

        if (!MediaLibAccessor.isMediaLibCompatible(new ParameterBlock())) {
            return null;
        }


        RenderedImage source = args.getRenderedSource(0);
        EnumeratedParameter scalingType =
            (EnumeratedParameter)args.getObjectParameter(0);
        EnumeratedParameter dataNature =
            (EnumeratedParameter)args.getObjectParameter(1);


        boolean isComplexSource =
            !dataNature.equals(DFTDescriptor.REAL_TO_COMPLEX);
        int numSourceBands = source.getSampleModel().getNumBands();


        // Use the two-dimensional mediaLib DFT if possible: it supports
        // only data which have a single component (real or complex)
        // per pixel and which have dimensions which are equal to a positive

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        if (!MediaLibAccessor.isMediaLibCompatible(new ParameterBlock())) {
            return null;
        }


        RenderedImage source = args.getRenderedSource(0);
        EnumeratedParameter scalingType =
            (EnumeratedParameter)args.getObjectParameter(0);
        EnumeratedParameter dataNature =
            (EnumeratedParameter)args.getObjectParameter(1);


        boolean isComplexSource =
            !dataNature.equals(DFTDescriptor.REAL_TO_COMPLEX);
        int numSourceBands = source.getSampleModel().getNumBands();


        // Use the two-dimensional mediaLib DFT if possible: it supports
        // only data which have a single component (real or complex)
        // per pixel and which have dimensions which are equal to a positive

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        RenderedImage alpha1 = (RenderedImage)args.getObjectParameter(0);
        Object alpha2 = args.getObjectParameter(1);
        boolean premultiplied =
            ((Boolean)args.getObjectParameter(2)).booleanValue();
        EnumeratedParameter destAlpha =
            (EnumeratedParameter)args.getObjectParameter(3);


        SampleModel sm = alpha1.getSampleModel();


        if (!(sm instanceof ComponentSampleModel) ||
            sm.getNumBands() != 1 ||
            !(alpha1.getColorModel() instanceof ComponentColorModel) ||
            alpha2 != null ||
            premultiplied ||
            !(destAlpha.equals(CompositeDescriptor.NO_DESTINATION_ALPHA))) {
            return null;
        }
            


        return new MlibCompositeOpImage(args.getRenderedSource(0),

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        /* Get BorderExtender from hints if any. */
        BorderExtender extender = RIFUtil.getBorderExtenderHint(hints);


        float shear_amt = args.getFloatParameter(0);
        EnumeratedParameter shear_dir =
            (EnumeratedParameter)args.getObjectParameter(1);
        float xTrans = args.getFloatParameter(2);
        float yTrans = args.getFloatParameter(3);
        double[] backgroundValues = (double[])args.getObjectParameter(5);


        // Create the affine transform
        AffineTransform tr = new AffineTransform();


        if (shear_dir.equals(ShearDescriptor.SHEAR_HORIZONTAL)) {
            // SHEAR_HORIZONTAL
            tr.setTransform(1.0, 0.0, shear_amt, 1.0, xTrans, 0.0);
        } else {
            // SHEAR_VERTICAL
            tr.setTransform(1.0, shear_amt, 0.0, 1.0, 0.0, yTrans);

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      alpha2 = (RenderedImage)args.getObjectParameter(1);
  }


        boolean premultiplied =
            ((Boolean)args.getObjectParameter(2)).booleanValue();
        EnumeratedParameter destAlpha =
            (EnumeratedParameter)args.getObjectParameter(3);


        if (destAlpha.equals(CompositeDescriptor.NO_DESTINATION_ALPHA)) {
            return new CompositeNoDestAlphaOpImage(source1, source2,
                                                   hints, layout,
                                                   alpha1, alpha2,
                                                   premultiplied);
        } else {
            return new CompositeOpImage(source1, source2,
                                        hints, layout,
                                        alpha1, alpha2,
                                        premultiplied,
                     destAlpha.equals(CompositeDescriptor.DESTINATION_ALPHA_FIRST));
        }
    }

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     * <code>EnumeratedParameter</code> provides a brief string
     * describing the numeric action value.
     */
    public static EnumeratedParameter[] getCachedTileActions() {
        return new EnumeratedParameter[] {
            new EnumeratedParameter("add", ADD),
            new EnumeratedParameter("remove", REMOVE),
            new EnumeratedParameter("remove_by_flush", REMOVE_FROM_FLUSH),
            new EnumeratedParameter("remove_by_memorycontrol",
                                    REMOVE_FROM_MEMCON),
            new EnumeratedParameter("timestamp_update_by_add", UPDATE_FROM_ADD),
            new EnumeratedParameter("timestamp_update_by_gettile",
                                    UPDATE_FROM_GETTILE),
            new EnumeratedParameter("preremove", ABOUT_TO_REMOVE)
        };
    }

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        if (isBilevel) {
            // Let Java code handle it, reformatting is slower
            return null;
        }


        EnumeratedParameter transposeType =
            (EnumeratedParameter)args.getObjectParameter(0);
        return new MlibTransposeOpImage(args.getRenderedSource(0),
                                        hints, layout,
                                        transposeType.getValue());
    }

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        // Get ImageLayout from renderHints if any.
        ImageLayout layout = RIFUtil.getImageLayoutHint(renderHints);
        


        RenderedImage source = paramBlock.getRenderedSource(0);
        EnumeratedParameter scalingType =
            (EnumeratedParameter)paramBlock.getObjectParameter(0);
        EnumeratedParameter dataNature =
            (EnumeratedParameter)paramBlock.getObjectParameter(1);


        FFT fft = new FFT(false, new Integer(scalingType.getValue()), 2);


        return new DFTOpImage(source, renderHints, layout, dataNature, fft);

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        if((serverMask & SERVER_JPEG_FULL) != SERVER_JPEG_FULL &&
           (serverMask & SERVER_FPX_FULL) != SERVER_FPX_FULL) {
            if((opMask & MASK_ROTATION) != 0) {
          // NOTE: The transpose operation uses clockwise rotation
          // whereas this operation expects counterclockwise.
                EnumeratedParameter transposeType = null;
                switch(paramBlock.getIntParameter(9)) {
                case 90:
                    transposeType = TransposeDescriptor.ROTATE_270;
                    break;
                case 180:
                    transposeType = TransposeDescriptor.ROTATE_180;
                    break;
                case 270:
                    transposeType = TransposeDescriptor.ROTATE_90;
                    break;
                }
                if(transposeType != null) { // deliberately redundant test
                    rendering =
                        JAI.create("transpose", rendering, transposeType);
                }
            }


            if((opMask & MASK_MIRROR_AXIS) != 0) {
                String axis = (String)paramBlock.getObjectParameter(10);
                EnumeratedParameter transposeType =
                    axis.equalsIgnoreCase("x") ?
                    TransposeDescriptor.FLIP_VERTICAL :
                    TransposeDescriptor.FLIP_HORIZONTAL;
                rendering = JAI.create("transpose", rendering, transposeType);
            }

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        ImageLayout layout = RIFUtil.getImageLayoutHint(renderHints);
        


        RenderedImage source = paramBlock.getRenderedSource(0);


        EnumeratedParameter type =
            (EnumeratedParameter)paramBlock.getObjectParameter(0);


        SampleModel sm = source.getSampleModel();
        if ((sm instanceof MultiPixelPackedSampleModel) &&
            (sm.getSampleSize(0) == 1) &&
            (sm.getDataType() == DataBuffer.TYPE_BYTE || 
             sm.getDataType() == DataBuffer.TYPE_USHORT || 
             sm.getDataType() == DataBuffer.TYPE_INT)) {
            return new TransposeBinaryOpImage(source, renderHints, layout,
                                              type.getValue());
        } else {
            return new TransposeOpImage(source, renderHints, layout,
                                        type.getValue());
        }
    }

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Related Classes of javax.media.jai.EnumeratedParameter

com.sun.media.jai.codecimpl.util.SunTileCache

com.sun.media.jai.mlib.MlibCompositeRIF

com.sun.media.jai.mlib.MlibDFTRIF

com.sun.media.jai.mlib.MlibIDFTRIF

com.sun.media.jai.mlib.MlibShearRIF

com.sun.media.jai.mlib.MlibTransposeRIF

com.sun.media.jai.opimage.CompositeCRIF

com.sun.media.jai.opimage.DFTCRIF

com.sun.media.jai.opimage.IDFTCRIF

com.sun.media.jai.opimage.IIPCRIF

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