Examples of java.awt.image.PixelInterleavedSampleModel

java.awt.image.PixelInterleavedSampleModel
This class represents image data which is stored in a pixel interleaved fashion and for which each sample of a pixel occupies one data element of the DataBuffer. It subclasses ComponentSampleModel but provides a more efficent implementation for accessing pixel interleaved image data than is provided by ComponentSampleModel. This class stores sample data for all bands in a single bank of the DataBuffer. Accessor methods are provided so that image data can be manipulated directly. Pixel stride is the number of data array elements between two samples for the same band on the same scanline. Scanline stride is the number of data array elements between a given sample and the corresponding sample in the same column of the next scanline. Band offsets denote the number of data array elements from the first data array element of the bank of the DataBuffer holding each band to the first sample of the band. The bands are numbered from 0 to N-1. Bank indices denote the correspondence between a bank of the data buffer and a band of image data. This class supports {@link DataBuffer#TYPE_BYTE TYPE_BYTE}, {@link DataBuffer#TYPE_USHORT TYPE_USHORT}, {@link DataBuffer#TYPE_SHORT TYPE_SHORT}, {@link DataBuffer#TYPE_INT TYPE_INT}, {@link DataBuffer#TYPE_FLOAT TYPE_FLOAT} and{@link DataBuffer#TYPE_DOUBLE TYPE_DOUBLE} datatypes.

                final int numComponents = getNumComponents();
                int[] bandOffsets = new int[numComponents];
                for (int i=0; i < numComponents; i++) {
                    bandOffsets[i] = i;
                }
                return new PixelInterleavedSampleModel(
                        getTransferType(), width, height,
                        numComponents,
                        width * numComponents,
                        bandOffsets);
            } else {

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                int w = pageImage.getWidth();
                int h = pageImage.getHeight();
                for (int i = 0; i < bands; i++) {
                    off[i] = i;
                }
                SampleModel sm = new PixelInterleavedSampleModel(
                        DataBuffer.TYPE_BYTE, w, h, bands, w * bands, off);


                RenderedImage rimg = new FormatRed(GraphicsUtil.wrap(pageImage), sm);
                return rimg;
            }

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    private static SampleModel createPixelInterleavedSampleModel
        (int dataType, int tileWidth, int tileHeight, int bands) {
        int [] bandOffsets = new int[bands];
        for (int i=0; i<bands; i++) 
            bandOffsets[i] = i;
        return new PixelInterleavedSampleModel
            (dataType, tileWidth, tileHeight, bands,
             tileWidth*bands, bandOffsets);
    }

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                // band offsets.
                int[] reverseOffsets = new int[numBands];
                for (int i=0; i<numBands; i++) {
                    reverseOffsets[i] = numBands - 1 - i;
                }
                sampleModel = new PixelInterleavedSampleModel
                    (dataType, tileWidth, tileHeight,
                     numBands, numBands*tileWidth, reverseOffsets);


                if(imageType == TYPE_GRAY) {
                  colorModel = new ComponentColorModel
                    (ColorSpace.getInstance(ColorSpace.CS_GRAY),
                     new int[] { sampleSize }, false, false, 
                     Transparency.OPAQUE, dataType);
                } else if (imageType == TYPE_RGB) {
                  colorModel = new ComponentColorModel
                    (ColorSpace.getInstance(ColorSpace.CS_sRGB),
                     new int[] { sampleSize, sampleSize, sampleSize }, 
                     false, false, Transparency.OPAQUE, dataType);
                } else { // hasAlpha
                    // Transparency.OPAQUE signifies image data that is 
                    // completely opaque, meaning that all pixels have an alpha
                    // value of 1.0. So the extra band gets ignored, which is
                    // what we want.
                    int transparency = Transparency.OPAQUE;
                    if(extraSamples == 1) { // associated (premultiplied) alpha
                        transparency = Transparency.TRANSLUCENT;
                    } else if(extraSamples == 2) { // unassociated alpha
                        transparency = Transparency.BITMASK;
                    }


                    colorModel =
                        createAlphaComponentColorModel(dataType,
                                                       numBands,
                                                       extraSamples == 1,
                                                       transparency);
                }
                break;


            case TYPE_GENERIC:
            case TYPE_YCBCR_SUB:
                // For this case we can't display the image, so we create a
                // SampleModel with increasing bandOffsets, and keep the
                // ColorModel as null, as there is no appropriate ColorModel.


                int[] bandOffsets = new int[numBands];
                for (int i=0; i<numBands; i++) {
                    bandOffsets[i] = i;
                }
    
                sampleModel = new PixelInterleavedSampleModel
                    (dataType, tileWidth, tileHeight,
                     numBands, numBands * tileWidth, bandOffsets);
                colorModel = null;
                break;

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                     dstCM.isAlphaPremultiplied(), null);
            } else {
                // All this nonsense is to work around the fact that the
                // Color convert op doesn't properly copy the Alpha from
                // s    rc to dst.
                PixelInterleavedSampleModel dstSM;
                dstSM = (PixelInterleavedSampleModel)wr.getSampleModel();
                SampleModel smna = new PixelInterleavedSampleModel
                    (dstSM.getDataType(),    
                     dstSM.getWidth(),       dstSM.getHeight(),
                     dstSM.getPixelStride(), dstSM.getScanlineStride(),
                     new int [] { 0 });

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        int height = sm.getHeight();


        ColorModel  cm = src.getColorModel();
        if (cm != null) {
            if (cm.hasAlpha()) 
                return new PixelInterleavedSampleModel
                    (DataBuffer.TYPE_BYTE, width, height, 2, 2*width,
                     new int [] { 0, 1 });


            return new PixelInterleavedSampleModel
                (DataBuffer.TYPE_BYTE, width, height, 1, width,
                 new int [] { 0 });
        }
        else {
            // No ColorModel so try to make some intelligent
            // decisions based just on the number of bands...
            // 1 bands -> lum
            // 2 bands -> lum (Band 0) & alpha (Band 1)
            // >2 bands -> lum (Band 0) - No color conversion...
            if (sm.getNumBands() == 2)
                return new PixelInterleavedSampleModel
                    (DataBuffer.TYPE_BYTE, width, height, 2, 2*width,
                     new int [] { 0, 1 });


            return new PixelInterleavedSampleModel
                (DataBuffer.TYPE_BYTE, width, height, 1, width,
                 new int [] { 0 });
        }
    }

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                int w = pageImage.getWidth();
                int h = pageImage.getHeight();
                for (int i = 0; i < bands; i++) {
                    off[i] = i;
                }
                SampleModel sm = new PixelInterleavedSampleModel(
                        DataBuffer.TYPE_BYTE, w, h, bands, w * bands, off);


                RenderedImage rimg = new FormatRed(GraphicsUtil.wrap(pageImage), sm);
                return rimg;
            }

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            ColorModel cm = new ComponentColorModel(
                    ColorSpace.getInstance(ColorSpace.CS_LINEAR_RGB), 
                    new int[] {8, 8, 8},
                    false, false,
                    ColorModel.OPAQUE, DataBuffer.TYPE_BYTE);
            SampleModel sampleModel = new PixelInterleavedSampleModel(
                    DataBuffer.TYPE_BYTE, w, h, 3, w * 3, new int[] {0, 1, 2});
            DataBuffer dbuf = new DataBufferByte(raw, w * h * 3);


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

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                    new int[] {8, 8, 8},
                    false, false,
                    ColorModel.OPAQUE, DataBuffer.TYPE_BYTE);
            int imgw = fopimage.getWidth();
            int imgh = fopimage.getHeight();
            SampleModel sampleModel = new PixelInterleavedSampleModel(
                    DataBuffer.TYPE_BYTE, imgw, imgh, 3, imgw * 3, new int[] {0, 1, 2});
            DataBuffer dbuf = new DataBufferByte(imgmap, imgw * imgh * 3);


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

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                int w = pageImage.getWidth();
                int h = pageImage.getHeight();
                for (int i = 0; i < bands; i++) {
                    off[i] = i;
                }
                SampleModel sm = new PixelInterleavedSampleModel(
                        DataBuffer.TYPE_BYTE, w, h, bands, w * bands, off);
                
                RenderedImage rimg = new FormatRed(GraphicsUtil.wrap(pageImage), sm);
                return rimg;
            }

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