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

            // byte colorMaps only
            return null;
        }


        // Check source compatibility.
        SampleModel sourceSM = source.getSampleModel();
        if(sourceSM.getDataType() != DataBuffer.TYPE_BYTE) {
            // byte source images only
            return null;
        } else if(sourceSM.getNumBands() != colorMap.getNumBands()) {
            // band counts must match
            return null;
        }


        // Get ImageLayout from RenderingHints if any.
        ImageLayout layoutHint = RIFUtil.getImageLayoutHint(hints);


        // Calculate the final ImageLayout.
        ImageLayout layout = 
            MlibOrderedDitherOpImage.layoutHelper(layoutHint,
                                                  source, colorMap);


        // Check for source and destination compatibility. The ColorModel
        // is suppressed in the second test because it will be an
        // IndexColorModel which would cause the test to fail.
        SampleModel destSM = layout.getSampleModel(null);
        if (!MediaLibAccessor.isMediaLibCompatible(args) ||
            (!MediaLibAccessor.isMediaLibCompatible(destSM, null) &&
             !ImageUtil.isBinary(destSM))) {
            return null;
        }

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        // Get sources.
        Vector sources = paramBlock.getSources();


        // Get target SampleModel.
        SampleModel targetSM = null;
        if(sources.size() > 0) {
            targetSM = ((RenderedImage)sources.get(0)).getSampleModel();
        } else if(layout != null &&
                  layout.isValid(ImageLayout.SAMPLE_MODEL_MASK)) {
            targetSM = layout.getSampleModel(null);
        }


        if(targetSM != null) {
            // Return if target data type is floating point. Other more
            // extensive type checking is done in MosaicOpImage constructor.
            int dataType = targetSM.getDataType();
            if(dataType == DataBuffer.TYPE_FLOAT ||
               dataType == DataBuffer.TYPE_DOUBLE) {
                return null;
            }
        }

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            // NOTE: this depends on JDK ordering
            destDataType = typei > destDataType ? typei : destDataType;
        }


        SampleModel sm = layout.getSampleModel((RenderedImage)sources.get(0));


        if ( sm.getNumBands() < destNumBands ) {
            int[] destOffsets = new int[destNumBands];


            for(int i=0; i < destNumBands; i++) {
                destOffsets[i] = i;
            }


            // determine the proper width and height to use
            int destTileWidth = sm.getWidth();
            int destTileHeight = sm.getHeight();
            if(layout.isValid(ImageLayout.TILE_WIDTH_MASK))
            {
                destTileWidth =
                    layout.getTileWidth((RenderedImage)sources.get(0));
            }

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        // Handle the special case of multiplying each band of an N-band
        // image by a 1-band image if the SampleModel.
        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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        }


  boolean isDataTypeChange = false;


        // Get prospective destination SampleModel.
        SampleModel sampleModel = layout.getSampleModel(src);


        // Create a new SampleModel if the type is not as desired.
        if (sampleModel.getDataType() != type) {
            int tileWidth = layout.getTileWidth(src);
            int tileHeight = layout.getTileHeight(src);
            int numBands = src.getSampleModel().getNumBands();


            SampleModel csm =
                RasterFactory.createComponentSampleModel(sampleModel,
                                                         type,
                                                         tileWidth,
                                                         tileHeight,
                                                         numBands);

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        KernelJAI unRotatedKernel = 
            (KernelJAI)paramBlock.getObjectParameter(0);
        KernelJAI kJAI = unRotatedKernel.getRotatedKernel();


  RenderedImage source = paramBlock.getRenderedSource(0);
  SampleModel sm = source.getSampleModel();


  // check dataType and binary 
        int dataType = sm.getDataType();


        boolean isBinary = (sm instanceof MultiPixelPackedSampleModel) &&
            (sm.getSampleSize(0) == 1) &&
            (dataType == DataBuffer.TYPE_BYTE || 
             dataType == DataBuffer.TYPE_USHORT || 
             dataType == DataBuffer.TYPE_INT);


  // possible speed up later: 3x3 with table lookup

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  if (source == null){
      throw new IllegalArgumentException(JaiI18N.getString("SerializableRenderedImage0"));
  }


  SampleModel sm = source.getSampleModel();
        if (sm != null &&
      SerializerFactory.getSerializer(sm.getClass()) == null) {
            throw new IllegalArgumentException(JaiI18N.getString("SerializableRenderedImage2"));
        }


  ColorModel cm = source.getColorModel();
        if (cm != null &&

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        }


        Rectangle region;
        if(dest == null) {
            region = imageBounds;
            SampleModel destSM =
                getSampleModel().createCompatibleSampleModel(region.width,
                                                             region.height);
            dest = Raster.createWritableRaster(destSM,
                                               new Point(region.x,
                                                         region.y));

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


            // The second source must be single-banded and the first must
            // be multi-banded.
            if(numBandsDst > 1 &&
               ((numBands1 > 1 && numBands2 == 1) ||

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        ROI roi= (ROI)paramBlock.getObjectParameter(3);
        int xPeriod = paramBlock.getIntParameter(4);
        int yPeriod = paramBlock.getIntParameter(5);


        // check if 3-band byte-type image
  SampleModel sm = source.getSampleModel();
        if (sm.getNumBands() != 3  && sm.getDataType() == DataBuffer.TYPE_BYTE)
            throw new IllegalArgumentException("ColorQuantizerRIF0");


        if (algorithm.equals(ColorQuantizerDescriptor.NEUQUANT))
            return new NeuQuantOpImage(source, (Map)renderHints, layout,
                                        maxColorNum, upperBound, roi,

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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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