Examples of java.awt.image.SampleModel

java.awt.image.SampleModel
This abstract class defines an interface for extracting samples of pixels in an image. All image data is expressed as a collection of pixels. Each pixel consists of a number of samples. A sample is a datum for one band of an image and a band consists of all samples of a particular type in an image. For example, a pixel might contain three samples representing its red, green and blue components. There are three bands in the image containing this pixel. One band consists of all the red samples from all pixels in the image. The second band consists of all the green samples and the remaining band consists of all of the blue samples. The pixel can be stored in various formats. For example, all samples from a particular band can be stored contiguously or all samples from a single pixel can be stored contiguously.
Subclasses of SampleModel specify the types of samples they can represent (e.g. unsigned 8-bit byte, signed 16-bit short, etc.) and may specify how the samples are organized in memory. In the Java 2D(tm) API, built-in image processing operators may not operate on all possible sample types, but generally will work for unsigned integral samples of 16 bits or less. Some operators support a wider variety of sample types.
A collection of pixels is represented as a Raster, which consists of a DataBuffer and a SampleModel. The SampleModel allows access to samples in the DataBuffer and may provide low-level information that a programmer can use to directly manipulate samples and pixels in the DataBuffer.
This class is generally a fall back method for dealing with images. More efficient code will cast the SampleModel to the appropriate subclass and extract the information needed to directly manipulate pixels in the DataBuffer. @see java.awt.image.DataBuffer @see java.awt.image.Raster @see java.awt.image.ComponentSampleModel @see java.awt.image.PixelInterleavedSampleModel @see java.awt.image.BandedSampleModel @see java.awt.image.MultiPixelPackedSampleModel @see java.awt.image.SinglePixelPackedSampleModel

        Rectangle bounds;
        if (dest == null) {
            // Create a WritableRaster for the entire image.
            bounds = imageBounds;
            Point p = new Point(minX, minY);
            SampleModel sm =
                sampleModel.createCompatibleSampleModel(width, height);
            dest = RasterFactory.createWritableRaster(sm, p);
        } else {
            bounds = dest.getBounds();
        }

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        // Handle the special case of adding a single band image to
        // each band of a multi-band image.
        int numBandsDst;
        if (layout != null && layout.isValid(ImageLayout.SAMPLE_MODEL_MASK)) {
            SampleModel sm = layout.getSampleModel(null);
            numBandsDst = sm.getNumBands();


            // One of the sources must be single-banded and the other must
            // have at most the number of bands in the SampleModel hint.
            if (numBandsDst > 1 &&
                ((numBands1 == 1 && numBands2 > 1) ||

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        return com.lightcrafts.media.jai.codec.PNGDecodeParam.class;
    }


    public boolean canEncodeImage(RenderedImage im,
                                  ImageEncodeParam param) {
        SampleModel sampleModel = im.getSampleModel();


        // PNG doesn't handle float or double pixels
        int dataType = sampleModel.getTransferType();
        if ((dataType == DataBuffer.TYPE_FLOAT) ||
            (dataType == DataBuffer.TYPE_DOUBLE)) {
            return false;
        }


        int[] sampleSize = sampleModel.getSampleSize();
        int bitDepth = sampleSize[0];


        // Ensure all channels have the same bit depth
        for (int i = 1; i < sampleSize.length; i++) {
            if (sampleSize[i] != bitDepth) {
                return false;
            }
        }


        // Bit depth must be between 1 and 16
        if (bitDepth < 1 || bitDepth > 16) {
            return false;
        }


        // Number of bands must be between 1 and 4
        int numBands = sampleModel.getNumBands();
        if (numBands < 1 || numBands > 4) {
            return false;
        }


        // Palette images must be 1-banded, depth 8 or less

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                                                int width, int height,
                                                int tileX, int tileY,
                                                int tileWidth, int tileHeight,
                                                int dataType, int numBands,
                                                boolean isBanded) {
        SampleModel sampleModel;
        if (isBanded) {
            sampleModel = RasterFactory.createBandedSampleModel(
                          dataType, tileWidth, tileHeight, numBands);
        } else {
            sampleModel = RasterFactory.createPixelInterleavedSampleModel(

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        long total = benchmarkOpImage(img,loops);


        int w = img.getWidth();
        int h = img.getHeight();
        SampleModel sm = img.getSampleModel();


        double time = (total)/1000.0;
        int width = img.getWidth();
        int height = img.getHeight();
        System.out.print("\tLoops : " + loops);

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      throw new IllegalArgumentException(
    JaiI18N.getString("TileEncoder1")) ;


  ByteArrayOutputStream baos = new ByteArrayOutputStream() ;


  SampleModel sm = ras.getSampleModel() ;


  JPEGEncodeParam j2dEP = convertToJ2DJPEGEncodeParam(paramList, sm) ;
        ((JPEGParam)j2dEP).setWidth(ras.getWidth()) ; 
  ((JPEGParam)j2dEP).setHeight(ras.getHeight()) ;

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                                          int tileWidth,
                                          int tileHeight,
                                          int pixelStride,
                                          int scanlineStride,
                                          int bandOffsets[]) {
        SampleModel sampleModel = null;


        if(dataType == DataBuffer.TYPE_FLOAT) {
            // This is a hack to make this work with JAI which in some
            // cases downcasts the DataBuffer to a type-specific class.
            // In the case of float data this current means the JAI class

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        if (src == null) {
            throw
        new IllegalArgumentException(JaiI18N.getString("LookupTableJAI1"));
        }


        SampleModel srcSampleModel = src.getSampleModel();
        if (!isIntegralDataType(srcSampleModel)) {
            throw
        new IllegalArgumentException(JaiI18N.getString("LookupTableJAI2"));
        }


        // Validate rectangle.
        if (rect == null) {
            rect = src.getBounds();
        } else {
            rect = rect.intersection(src.getBounds());
        }


        if (dst != null) {
            rect = rect.intersection(dst.getBounds());
        }


        // Validate destination.
        SampleModel dstSampleModel;
        if (dst == null) {  // create dst according to table
            dstSampleModel = getDestSampleModel(srcSampleModel,
                                                rect.width, rect.height);
            dst =
                RasterFactory.createWritableRaster(dstSampleModel,
                                                   new Point(rect.x, rect.y));
        } else {
            dstSampleModel = dst.getSampleModel();


            if (dstSampleModel.getTransferType() != getDataType() ||
                dstSampleModel.getNumBands() !=
                getDestNumBands(srcSampleModel.getNumBands())) {
                throw new
      IllegalArgumentException(JaiI18N.getString("LookupTableJAI3"));
            }
        }

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     * @return Whether the color map is valid.
     */
    private static boolean isValidColorMap(RenderedImage sourceImage,
                                           ColorCube colorMap,
                                           StringBuffer msg) {
        SampleModel srcSampleModel = sourceImage.getSampleModel();


        if(colorMap.getDataType() != srcSampleModel.getTransferType()) {
            msg.append(JaiI18N.getString("OrderedDitherDescriptor3"));
            return false;
        } else if (colorMap.getNumBands() != srcSampleModel.getNumBands()) {
            msg.append(JaiI18N.getString("OrderedDitherDescriptor4"));
            return false;
        }


        return true;

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        il.setMinY(source.getMinY());
        il.setWidth(source.getWidth());
        il.setHeight(source.getHeight());


        // Get the SampleModel.
        SampleModel sm = il.getSampleModel(source);


        // Ensure an appropriate SampleModel.
        if(colormap.getNumBands() == 1 &&
           colormap.getNumEntries() == 2 &&
           !ImageUtil.isBinary(il.getSampleModel(source))) {
            sm = new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE,
                                                 il.getTileWidth(source),
                                                 il.getTileHeight(source),
                                                 1);
            il.setSampleModel(sm);
        }


        // Make sure that this OpImage is single-banded.
        if (sm.getNumBands() != 1) {
            sm =
                RasterFactory.createComponentSampleModel(sm,
                                                         sm.getTransferType(),
                                                         sm.getWidth(),
                                                         sm.getHeight(),
                                                         1);
      il.setSampleModel(sm);


            // Clear the ColorModel mask if needed.
            ColorModel cm = il.getColorModel(null);
            if(cm != null &&
               !JDKWorkarounds.areCompatibleDataModels(sm, cm)) {
                // Clear the mask bit if incompatible.
                il.unsetValid(ImageLayout.COLOR_MODEL_MASK);
            }
        }


        // Set an IndexColorModel on the image if:
        // a. none is provided in the layout;
        // b. source, destination, and colormap have byte data type;
        // c. the colormap has 3 bands.
        if((layout == null || !il.isValid(ImageLayout.COLOR_MODEL_MASK)) &&
           source.getSampleModel().getDataType() == DataBuffer.TYPE_BYTE &&
           sm.getDataType() == DataBuffer.TYPE_BYTE &&
           colormap.getDataType() == DataBuffer.TYPE_BYTE &&
           colormap.getNumBands() == 3) {
            ColorModel cm = source.getColorModel();
            if(cm == null ||
               (cm != null && cm.getColorSpace().isCS_sRGB())) {

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Related Classes of java.awt.image.SampleModel

com.lightcrafts.media.jai.codecimpl.SimpleRenderedImage

com.lightcrafts.media.jai.codecimpl.util.FloatDoubleColorModel

com.lightcrafts.media.jai.codecimpl.util.RasterFactory

com.lightcrafts.media.jai.mlib.MediaLibAccessor

com.lightcrafts.media.jai.mlib.MlibLookupOpImage

com.lightcrafts.media.jai.opimage.ColorQuantizerOpImage

com.lightcrafts.media.jai.opimage.ConstantOpImage

com.lightcrafts.media.jai.opimage.ErrorDiffusionOpImage

com.lightcrafts.media.jai.opimage.MosaicOpImage

com.lightcrafts.media.jai.rmi.SampleModelState

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