Examples of java.awt.image.MultiPixelPackedSampleModel

java.awt.image.MultiPixelPackedSampleModel
The MultiPixelPackedSampleModel class represents one-banded images and can pack multiple one-sample pixels into one data element. Pixels are not allowed to span data elements. The data type can be DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT, or DataBuffer.TYPE_INT. Each pixel must be a power of 2 number of bits and a power of 2 number of pixels must fit exactly in one data element. Pixel bit stride is equal to the number of bits per pixel. Scanline stride is in data elements and the last several data elements might be padded with unused pixels. Data bit offset is the offset in bits from the beginning of the {@link DataBuffer} to the first pixel and must bea multiple of pixel bit stride.
The following code illustrates extracting the bits for pixel x, y from DataBuffer data and storing the pixel data in data elements of type dataType:
```
 int dataElementSize = DataBuffer.getDataTypeSize(dataType); int bitnum = dataBitOffset + x*pixelBitStride; int element = data.getElem(y*scanlineStride + bitnum/dataElementSize); int shift = dataElementSize - (bitnum & (dataElementSize-1)) - pixelBitStride; int pixel = (element >> shift) & ((1 << pixelBitStride) - 1); 
```


        // 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);
        }

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            out.writeInt(sm.getWidth());
            out.writeInt(sm.getHeight());
            out.writeInt(sm.getScanlineStride());
            out.writeObject(sm.getBitMasks());
        } else if(sampleModel instanceof MultiPixelPackedSampleModel) {
            MultiPixelPackedSampleModel sm =
                (MultiPixelPackedSampleModel)sampleModel;
            out.writeInt(TYPE_MULTI_PIXEL_PACKED);
            out.writeInt(sm.getTransferType());
            out.writeInt(sm.getWidth());
            out.writeInt(sm.getHeight());
            out.writeInt(sm.getPixelBitStride());
            out.writeInt(sm.getScanlineStride());
            out.writeInt(sm.getDataBitOffset());
        } else {
            throw new RuntimeException(JaiI18N.getString("SampleModelState0"));
        }
    }

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                                                           in.readInt(),
                                                           in.readInt(),
                                                           (int[])in.readObject());
            break;
        case TYPE_MULTI_PIXEL_PACKED:
            sampleModel = new MultiPixelPackedSampleModel(in.readInt(),
                                                          in.readInt(),
                                                          in.readInt(),
                                                          in.readInt(),
                                                          in.readInt(),
                                                          in.readInt());

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    protected void computeRect(Raster[] sources,
                               WritableRaster dest,
                               Rectangle destRect) {
        Raster source = sources[0];


        MultiPixelPackedSampleModel mppsm =
            (MultiPixelPackedSampleModel)source.getSampleModel();
        int srcScanlineStride = mppsm.getScanlineStride();


        int incr1 = 0, incr2 = 0, s_x = 0, s_y = 0;


        int bits = 8;
        int dataType = source.getSampleModel().getDataType();

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    private void byteLoop(Raster source,
                          WritableRaster dest,
                          Rectangle destRect,
                          int incr1, int incr2, int s_x, int s_y) {
        MultiPixelPackedSampleModel sourceSM = 
            (MultiPixelPackedSampleModel)source.getSampleModel();
        DataBufferByte sourceDB =
            (DataBufferByte)source.getDataBuffer();
        int sourceTransX = source.getSampleModelTranslateX();
        int sourceTransY = source.getSampleModelTranslateY();
        int sourceDataBitOffset = sourceSM.getDataBitOffset();
        int sourceScanlineStride = sourceSM.getScanlineStride();


        MultiPixelPackedSampleModel destSM = 
            (MultiPixelPackedSampleModel)dest.getSampleModel();
        DataBufferByte destDB =
            (DataBufferByte)dest.getDataBuffer();
        int destMinX = dest.getMinX();
        int destMinY = dest.getMinY();
        int destTransX = dest.getSampleModelTranslateX();
        int destTransY = dest.getSampleModelTranslateY();
        int destDataBitOffset = destSM.getDataBitOffset();
        int destScanlineStride = destSM.getScanlineStride();


        byte[] sourceData = sourceDB.getData();
        int sourceDBOffset = sourceDB.getOffset();


        byte[] destData = destDB.getData();

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    private void shortLoop(Raster source,
                           Raster dest,
                           Rectangle destRect,
                           int incr1, int incr2, int s_x, int s_y) {
        MultiPixelPackedSampleModel sourceSM = 
            (MultiPixelPackedSampleModel)source.getSampleModel();
        DataBufferUShort sourceDB =
            (DataBufferUShort)source.getDataBuffer();
        int sourceTransX = source.getSampleModelTranslateX();
        int sourceTransY = source.getSampleModelTranslateY();
        int sourceDataBitOffset = sourceSM.getDataBitOffset();
        int sourceScanlineStride = sourceSM.getScanlineStride();


        MultiPixelPackedSampleModel destSM = 
            (MultiPixelPackedSampleModel)dest.getSampleModel();
        DataBufferUShort destDB =
            (DataBufferUShort)dest.getDataBuffer();
        int destMinX = dest.getMinX();
        int destMinY = dest.getMinY();
        int destTransX = dest.getSampleModelTranslateX();
        int destTransY = dest.getSampleModelTranslateY();
        int destDataBitOffset = destSM.getDataBitOffset();
        int destScanlineStride = destSM.getScanlineStride();


        short[] sourceData = sourceDB.getData();
        int sourceDBOffset = sourceDB.getOffset();


        short[] destData = destDB.getData();

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    private void intLoop(Raster source,
                         Raster dest,
                         Rectangle destRect,
                         int incr1, int incr2, int s_x, int s_y) {
        MultiPixelPackedSampleModel sourceSM = 
            (MultiPixelPackedSampleModel)source.getSampleModel();
        DataBufferInt sourceDB =
            (DataBufferInt)source.getDataBuffer();
        int sourceTransX = source.getSampleModelTranslateX();
        int sourceTransY = source.getSampleModelTranslateY();
        int sourceDataBitOffset = sourceSM.getDataBitOffset();
        int sourceScanlineStride = sourceSM.getScanlineStride();


        MultiPixelPackedSampleModel destSM = 
            (MultiPixelPackedSampleModel)dest.getSampleModel();
        DataBufferInt destDB =
            (DataBufferInt)dest.getDataBuffer();
        int destMinX = dest.getMinX();
        int destMinY = dest.getMinY();
        int destTransX = dest.getSampleModelTranslateX();
        int destTransY = dest.getSampleModelTranslateY();
        int destDataBitOffset = destSM.getDataBitOffset();
        int destScanlineStride = destSM.getScanlineStride();


        int[] sourceData = sourceDB.getData();
        int sourceDBOffset = sourceDB.getOffset();


        int[] destData = destDB.getData();

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        float src_rect_x1 = source.getMinX();
        float src_rect_y1 = source.getMinY();
        float src_rect_x2 = src_rect_x1 + source.getWidth();
        float src_rect_y2 = src_rect_y1 + source.getHeight();


        MultiPixelPackedSampleModel sourceSM =
            (MultiPixelPackedSampleModel)source.getSampleModel();
        DataBufferByte sourceDB =
            (DataBufferByte)source.getDataBuffer();
        int sourceTransX = source.getSampleModelTranslateX();
        int sourceTransY = source.getSampleModelTranslateY();
        int sourceDataBitOffset = sourceSM.getDataBitOffset();
        int sourceScanlineStride = sourceSM.getScanlineStride();


        MultiPixelPackedSampleModel destSM =
            (MultiPixelPackedSampleModel)dest.getSampleModel();
        DataBufferByte destDB =
            (DataBufferByte)dest.getDataBuffer();
        int destMinX = dest.getMinX();
        int destMinY = dest.getMinY();
        int destTransX = dest.getSampleModelTranslateX();
        int destTransY = dest.getSampleModelTranslateY();
        int destDataBitOffset = destSM.getDataBitOffset();
        int destScanlineStride = destSM.getScanlineStride();


        byte[] sourceData = sourceDB.getData();
        int sourceDBOffset = sourceDB.getOffset();


        byte[] destData = destDB.getData();

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        float src_rect_x1 = source.getMinX();
        float src_rect_y1 = source.getMinY();
        float src_rect_x2 = src_rect_x1 + source.getWidth();
        float src_rect_y2 = src_rect_y1 + source.getHeight();


        MultiPixelPackedSampleModel sourceSM =
            (MultiPixelPackedSampleModel)source.getSampleModel();
        DataBufferUShort sourceDB =
            (DataBufferUShort)source.getDataBuffer();
        int sourceTransX = source.getSampleModelTranslateX();
        int sourceTransY = source.getSampleModelTranslateY();
        int sourceDataBitOffset = sourceSM.getDataBitOffset();
        int sourceScanlineStride = sourceSM.getScanlineStride();


        MultiPixelPackedSampleModel destSM =
            (MultiPixelPackedSampleModel)dest.getSampleModel();
        DataBufferUShort destDB =
            (DataBufferUShort)dest.getDataBuffer();
        int destMinX = dest.getMinX();
        int destMinY = dest.getMinY();
        int destTransX = dest.getSampleModelTranslateX();
        int destTransY = dest.getSampleModelTranslateY();
        int destDataBitOffset = destSM.getDataBitOffset();
        int destScanlineStride = destSM.getScanlineStride();


        short[] sourceData = sourceDB.getData();
        int sourceDBOffset = sourceDB.getOffset();


        short[] destData = destDB.getData();

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        float src_rect_x1 = source.getMinX();
        float src_rect_y1 = source.getMinY();
        float src_rect_x2 = src_rect_x1 + source.getWidth();
        float src_rect_y2 = src_rect_y1 + source.getHeight();


        MultiPixelPackedSampleModel sourceSM =
            (MultiPixelPackedSampleModel)source.getSampleModel();
        DataBufferInt sourceDB =
            (DataBufferInt)source.getDataBuffer();
        int sourceTransX = source.getSampleModelTranslateX();
        int sourceTransY = source.getSampleModelTranslateY();
        int sourceDataBitOffset = sourceSM.getDataBitOffset();
        int sourceScanlineStride = sourceSM.getScanlineStride();


        MultiPixelPackedSampleModel destSM =
            (MultiPixelPackedSampleModel)dest.getSampleModel();
        DataBufferInt destDB =
            (DataBufferInt)dest.getDataBuffer();
        int destMinX = dest.getMinX();
        int destMinY = dest.getMinY();
        int destTransX = dest.getSampleModelTranslateX();
        int destTransY = dest.getSampleModelTranslateY();
        int destDataBitOffset = destSM.getDataBitOffset();
        int destScanlineStride = destSM.getScanlineStride();


        int[] sourceData = sourceDB.getData();
        int sourceDBOffset = sourceDB.getOffset();


        int[] destData = destDB.getData();

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