Examples of java.awt.image.DataBufferByte

java.awt.image.DataBufferByte
This class extends DataBuffer and stores data internally as bytes. Values stored in the byte array(s) of this DataBuffer are treated as unsigned values.

                false, false,
                ColorModel.OPAQUE, DataBuffer.TYPE_BYTE);
        SampleModel sampleModel = new PixelInterleavedSampleModel(
                DataBuffer.TYPE_BYTE, image.getWidth(), image.getHeight(), 3, image.getWidth() * 3, 
                new int[] {0, 1, 2});
        DataBuffer dbuf = new DataBufferByte(image.getBitmaps(), 
                image.getWidth() * image.getHeight() * 3);


        WritableRaster raster = Raster.createWritableRaster(sampleModel,
                dbuf, null);

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        int banks = srcDB.getNumBanks();
        int [] offsets = srcDB.getOffsets();
        for (int b=0; b< banks; b++) {
            switch (srcDB.getDataType()) {
            case DataBuffer.TYPE_BYTE: {
                DataBufferByte srcDBT = (DataBufferByte)srcDB;
                DataBufferByte retDBT = (DataBufferByte)retDB;
                System.arraycopy(srcDBT.getData(b), offsets[b],
                                 retDBT.getData(b), offsets[b], len);
                break;
            }
            case DataBuffer.TYPE_INT: {
                DataBufferInt srcDBT = (DataBufferInt)srcDB;
                DataBufferInt retDBT = (DataBufferInt)retDB;
                System.arraycopy(srcDBT.getData(b), offsets[b],
                                 retDBT.getData(b), offsets[b], len);
                break;
            }
            case DataBuffer.TYPE_SHORT: {
                DataBufferShort srcDBT = (DataBufferShort)srcDB;
                DataBufferShort retDBT = (DataBufferShort)retDB;
                System.arraycopy(srcDBT.getData(b), offsets[b],
                                 retDBT.getData(b), offsets[b], len);
                break;
            }
            case DataBuffer.TYPE_USHORT: {
                DataBufferUShort srcDBT = (DataBufferUShort)srcDB;
                DataBufferUShort retDBT = (DataBufferUShort)retDB;
                System.arraycopy(srcDBT.getData(b), offsets[b],
                                 retDBT.getData(b), offsets[b], len);
                break;
            }
            default:
                throw new
                    UnsupportedOperationException("unsupported data type: "

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        final int scanStride = csm.getScanlineStride();
        final int pixStride  = csm.getPixelStride();
        final int [] bandOff = csm.getBandOffsets();


        DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
        final int base
            = (db.getOffset() +
               csm.getOffset(wr.getMinX()-wr.getSampleModelTranslateX(),
                             wr.getMinY()-wr.getSampleModelTranslateY()));


        int aOff = bandOff[bandOff.length-1];
        int bands = bandOff.length-1;


        // Access the pixel data array
        final byte[] pixels = db.getBankData()[0];
        for (int y=0; y<wr.getHeight(); y++) {
            int sp = base + y*scanStride;
            final int end = sp + width*pixStride;
            while (sp < end) {
              int a = pixels[sp+aOff]&0xFF;

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        final int scanStride = csm.getScanlineStride();
        final int pixStride  = csm.getPixelStride();
        final int [] bandOff = csm.getBandOffsets();


        DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
        final int base
            = (db.getOffset() +
               csm.getOffset(wr.getMinX()-wr.getSampleModelTranslateX(),
                             wr.getMinY()-wr.getSampleModelTranslateY()));




        int aOff = bandOff[bandOff.length-1];
        int bands = bandOff.length-1;


        // Access the pixel data array
        final byte[] pixels = db.getBankData()[0];
        for (int y=0; y<wr.getHeight(); y++) {
            int sp = base + y*scanStride;
            final int end = sp + width*pixStride;
            while (sp < end) {
              int a = pixels[sp+aOff]&0xFF;

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                }
            }
        }else if(model == cm && model.getTransferType() == DataBuffer.TYPE_BYTE &&
                raster.getNumDataElements() == 1){


            DataBufferByte dbb = (DataBufferByte)raster.getDataBuffer();
            byte data[] = dbb.getData();
            int scanline = raster.getWidth();
            int rof = dbb.getOffset() + y * scanline + x;
            for(int lineOff = off, line = y; line < y + h;
                line++, lineOff += scansize, rof += scanline){
                System.arraycopy(pixels, lineOff, data, rof, w);
            }
        }else if(model == cm && model.getTransferType() == DataBuffer.TYPE_BYTE &&

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                 false,                         // Not premultiplied
                 Transparency.OPAQUE,           // No transparency
                 DataBuffer.TYPE_BYTE);         // 8 Bits
            
            // Build a raster with bands 0, 1 and 2 of img's raster
            DataBufferByte data = (DataBufferByte)srcWR.getDataBuffer();
            srcWR = Raster.createBandedRaster
                (data, argbWR.getWidth(), argbWR.getHeight(), 
                 argbWR.getWidth(), new int[]{0, 1, 2},
                 new int[]{0, 0, 0}, new Point(0, 0));
            BufferedImage newImg = new BufferedImage
                (newCM, srcWR, newCM.isAlphaPremultiplied(), null);


            /**
             * Now, convert the image to sRGB
             */
            ComponentColorModel sRGBCompCM = new ComponentColorModel
                (ColorSpace.getInstance(ColorSpace.CS_sRGB),
                 new int[]{8, 8, 8},
                 false,
                 false,
                 Transparency.OPAQUE,
                 DataBuffer.TYPE_BYTE);


            WritableRaster wr = Raster.createBandedRaster
                (DataBuffer.TYPE_BYTE, argbWR.getWidth(), argbWR.getHeight(),
                 sRGBCompCM.getNumComponents(), new Point(0, 0));


            BufferedImage sRGBImage = new BufferedImage
                (sRGBCompCM, wr, false, null);
            ColorConvertOp colorConvertOp = new ColorConvertOp(null);
            colorConvertOp.filter(newImg, sRGBImage);


            /**
             * Integrate alpha back into the image if there is any
             */
            if (imgCM.hasAlpha()){
                DataBufferByte rgbData = (DataBufferByte)wr.getDataBuffer();
                byte[][] imgBanks = data.getBankData();
                byte[][] rgbBanks = rgbData.getBankData();
                
                byte[][] argbBanks = {rgbBanks[0], rgbBanks[1], 
                                      rgbBanks[2], imgBanks[3]};
                DataBufferByte argbData = new DataBufferByte(argbBanks, imgBanks[0].length);
                srcWR = Raster.createBandedRaster
                    (argbData, argbWR.getWidth(), argbWR.getHeight(),
                     argbWR.getWidth(), new int[]{0, 1, 2, 3},
                     new int[]{0, 0, 0, 0}, new Point(0, 0));
                sRGBCompCM = new ComponentColorModel

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        WritableRaster raster = image.getRaster();
        if (raster.getDataBuffer().getDataType() != DataBuffer.TYPE_BYTE)
        {
            throw new IOException("Not implemented: greater than 8-bit depth");
        }
        DataBufferByte buffer = (DataBufferByte)raster.getDataBuffer();
        decoded.write(buffer.getData());


        return result;
    }

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  public void test(TestHarness harness)      
  {
    SinglePixelPackedSampleModel m1 = new SinglePixelPackedSampleModel(
      DataBuffer.TYPE_BYTE, 2, 2, new int[] { 0xF0, 0x0F }
    );
    DataBufferByte db = new DataBufferByte(new byte[] { (byte) 0x12, (byte) 0x34, (byte) 0xAB, (byte) 0xCD }, 4);


    // check regular fetch
    int sample = m1.getSample(1, 1, 1, db);
    harness.check(sample, 0x0D);

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  public void test(TestHarness harness)      
  {
    SinglePixelPackedSampleModel m1 = new SinglePixelPackedSampleModel(
      DataBuffer.TYPE_BYTE, 2, 2, new int[] { 0xF0, 0x0F }
    );
    DataBufferByte db = new DataBufferByte(new byte[] { (byte) 0x12, (byte) 0x34, (byte) 0xAB, (byte) 0xCD }, 4);


    // check regular fetch
    int[] samples = m1.getPixel(1, 1, (int[]) null, db);
    harness.check(samples[0], 0x0C);
    harness.check(samples[1], 0x0D);

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    harness.check(db.getElem(0, 10), 99);
    m.setSample(2, 1, 1, 88, db);
    harness.check(db.getElem(0, 11), 88);
    
    // what happens if the data buffer doesn't hold integers?
    DataBuffer db2 = new DataBufferByte(12);
    m.setSample(2, 1, 0, 99, db2);
    harness.check(db2.getElem(0, 10), 99);
    m.setSample(2, 1, 1, 888, db2);
    harness.check(db2.getElem(0, 11), 120);  // (byte) 888
    
    // check that a null data buffer generates a NullPointerException
    boolean pass = false;
    try
      {

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