Examples of java.awt.image.ComponentSampleModel

java.awt.image.ComponentSampleModel
This class represents image data which is stored such that each sample of a pixel occupies one data element of the DataBuffer. It stores the N samples which make up a pixel in N separate data array elements. Different bands may be in different banks of the DataBuffer. Accessor methods are provided so that image data can be manipulated directly. This class can support different kinds of interleaving, e.g. band interleaving, scanline interleaving, and pixel interleaving. 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. This class can represent image data for which each sample is an unsigned integral number which can be stored in 8, 16, or 32 bits (using DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT, or DataBuffer.TYPE_INT, respectively), data for which each sample is a signed integral number which can be stored in 16 bits (using DataBuffer.TYPE_SHORT), or data for which each sample is a signed float or double quantity (using DataBuffer.TYPE_FLOAT or DataBuffer.TYPE_DOUBLE, respectively). All samples of a given ComponentSampleModel are stored with the same precision. All strides and offsets must be non-negative. 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}, {@link DataBuffer#TYPE_DOUBLE TYPE_DOUBLE}, @see java.awt.image.PixelInterleavedSampleModel @see java.awt.image.BandedSampleModel

          // this is much faster than iterating through the pixels.
          // if we create a writable raster and then construct a buffered image,
          // no new array is created and no data is copied.
          // TODO: optimize other cases.
          final DataBufferByte db = new DataBufferByte(new byte[][] {bytes}, bytes.length);
          final ComponentSampleModel sm = new ComponentSampleModel(DataBuffer.TYPE_BYTE, w, h, pixelStride, lineStride, new int[] {redMask - 1, greenMask -1, blueMask -1});
          final WritableRaster r = Raster.createWritableRaster(sm, db, new Point(0, 0));
          // construction borrowed from BufferedImage constructor, for BufferedImage.TYPE_3BYTE_BGR
                  final ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
                  int[] nBits = {8, 8, 8};
                  //int[] bOffs = {2, 1, 0};
                  final ColorModel colorModel = new ComponentColorModel(cs, nBits, false, false,
                                                       Transparency.OPAQUE,
                                                       DataBuffer.TYPE_BYTE);
                  final BufferedImage bi = new BufferedImage(colorModel, r, false, null);
          return bi;
        }
        else if (bitsPerPixel == 32)
        {
          final DataBufferByte db = new DataBufferByte(new byte[][] {bytes}, bytes.length);
          final ComponentSampleModel sm = new ComponentSampleModel(DataBuffer.TYPE_BYTE, w, h, pixelStride, lineStride, new int[] {redMask - 1, greenMask -1, blueMask -1, 3});  // TODO: what to do with alpha?
          final WritableRaster r = Raster.createWritableRaster(sm, db, new Point(0, 0));
          // construction borrowed from BufferedImage constructor, for BufferedImage.TYPE_4BYTE_ABGR
                  final ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
                  int[] nBits = {8, 8, 8, 8};
                  //int[] bOffs = {3, 2, 1, 0};

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    else
    {  
      if (bi.getColorModel() instanceof ComponentColorModel && bi.getSampleModel() instanceof ComponentSampleModel)
      {
        final ComponentColorModel componentColorModel = (ComponentColorModel) bi.getColorModel();
        final ComponentSampleModel componentSampleModel = (ComponentSampleModel) bi.getSampleModel();
        final int[] offsets = componentSampleModel.getBandOffsets();
        if (dataBuffer instanceof DataBufferInt)
        {
          // TODO: untested
          bitsPerPixel = 32;  
          red = 0xFF << offsets[0];
          green = 0xFF << offsets[1];
          blue = 0xFF << offsets[2];


        }
        else if (dataBuffer instanceof DataBufferByte)
        {
          bitsPerPixel = componentSampleModel.getPixelStride() * 8;  // TODO: should it always be 24? or are the pixel stride and the bits per pixel unrelated?
          red = 1 + offsets[0];
          green = 1 + offsets[1];
          blue = 1 + offsets[2];
        }
        else

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                ColorModel cm = null;
                WritableRaster wr = null;
                if (depth() == IPL_DEPTH_8U || depth() == IPL_DEPTH_8S) {
                    cm = new ComponentColorModel(cs, alpha,
                            false, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
                    wr = Raster.createWritableRaster(new ComponentSampleModel(
                            DataBuffer.TYPE_BYTE, width(), height(), nChannels(), widthStep(),
                            offsets), null);
                } else if (depth() == IPL_DEPTH_16U) {
                    cm = new ComponentColorModel(cs, alpha,
                            false, Transparency.OPAQUE, DataBuffer.TYPE_USHORT);
                    wr = Raster.createWritableRaster(new ComponentSampleModel(
                            DataBuffer.TYPE_USHORT, width(), height(), nChannels(), widthStep()/2,
                            offsets), null);
                } else if (depth() == IPL_DEPTH_16S) {
                    cm = new ComponentColorModel(cs, alpha,
                            false, Transparency.OPAQUE, DataBuffer.TYPE_SHORT);
                    wr = Raster.createWritableRaster(new ComponentSampleModel(
                            DataBuffer.TYPE_SHORT, width(), height(), nChannels(), widthStep()/2,
                            offsets), null);
                } else if (depth() == IPL_DEPTH_32S) {
                    cm = new ComponentColorModel(cs, alpha,
                            false, Transparency.OPAQUE, DataBuffer.TYPE_INT);
                    wr = Raster.createWritableRaster(new ComponentSampleModel(
                            DataBuffer.TYPE_INT, width(), height(), nChannels(), widthStep()/4,
                            offsets), null);
                } else if (depth() == IPL_DEPTH_32F) {
                    cm = new ComponentColorModel(cs, alpha,
                            false, Transparency.OPAQUE, DataBuffer.TYPE_FLOAT);
                    wr = Raster.createWritableRaster(new ComponentSampleModel(
                            DataBuffer.TYPE_FLOAT, width(), height(), nChannels(), widthStep()/4,
                            offsets), null);
                } else if (depth() == IPL_DEPTH_64F) {
                    cm = new ComponentColorModel(cs, alpha,
                            false, Transparency.OPAQUE, DataBuffer.TYPE_DOUBLE);
                    wr = Raster.createWritableRaster(new ComponentSampleModel(
                            DataBuffer.TYPE_DOUBLE, width(), height(), nChannels(), widthStep()/8,
                            offsets), null);
                }


                bufferedImage = new BufferedImage(cm, wr, false, null);

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            }
        } else if ((variant == PGM_RAW || variant == PPM_RAW) &&
                   sampleModel instanceof ComponentSampleModel &&
                   !(colorModel instanceof IndexColorModel)) {


            ComponentSampleModel csm =
                (ComponentSampleModel)sampleModel;


            // Pixel stride must equal band count.
            if(csm.getPixelStride() == numBands) {
                writeOptimal = true;


                // Band offsets must equal band indices.
                if(variant == PPM_RAW) {
                    int[] bandOffsets = csm.getBandOffsets();
                    for(int b = 0; b < numBands; b++) {
                        if(bandOffsets[b] != b) {
                            writeOptimal = false;
                            break;
                        }

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            SampleModel srcSM = getSampleModel();
            int dataType = srcSM.getDataType();
            int nbands = srcSM.getNumBands();
            boolean isBandChild = false;


            ComponentSampleModel csm = null;
            int[] bandOffs = null;


            boolean fastCobblePossible = false;
            if (srcSM instanceof ComponentSampleModel) {
                csm = (ComponentSampleModel)srcSM;
                int ps = csm.getPixelStride();
                boolean isBandInt = (ps == 1 && nbands > 1);
                isBandChild = (ps > 1 && nbands != ps);
                if ( (!isBandChild) && (!isBandInt)) {
                    bandOffs = csm.getBandOffsets();
                    int i;
                    for (i=0; i<nbands; i++) {
                        if (bandOffs[i] >= nbands) {
                            break;
                        }

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                RasterAccessor d = new RasterAccessor(raster, subRegion,
                                                      dstTag, null);


                if (getSampleModel() instanceof ComponentSampleModel &&
                    raster.getSampleModel() instanceof ComponentSampleModel) {
                    ComponentSampleModel ssm = (ComponentSampleModel) getSampleModel();


                    if (ssm.getPixelStride() == ssm.getNumBands() &&
                        getSampleModel().getNumBands() == raster.getSampleModel().getNumBands())
                        fastCopyRaster(s, d);
                    else
                        ImageUtil.copyRaster(s, d);
                } else

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    }


    private void cobbleByte(Rectangle bounds,
                            Raster dstRaster) {


        ComponentSampleModel dstSM =
            (ComponentSampleModel)dstRaster.getSampleModel();


        int startX = XToTileX(bounds.x);
        int startY = YToTileY(bounds.y);
        int rectXend = bounds.x + bounds.width - 1;
        int rectYend = bounds.y + bounds.height - 1;
        int endX = XToTileX(rectXend);
        int endY = YToTileY(rectYend);


        //
        //  Get parameters of destination raster
        //
        DataBufferByte dstDB = (DataBufferByte)dstRaster.getDataBuffer();
        byte[] dst           = dstDB.getData();
        int dstPS            = dstSM.getPixelStride();
        int dstSS            = dstSM.getScanlineStride();


        boolean tileParamsSet = false;
        ComponentSampleModel srcSM = null;
        int srcPS=0, srcSS=0;
        int xOrg, yOrg;
        int srcX1, srcY1, srcX2, srcY2, srcW, srcH;


        for (int y = startY; y <= endY; y++) {
            for (int x = startX; x <= endX; x++) {
                Raster tile = getTile(x, y);
                if (tile == null) {
                    //
                    // Out-of-bounds tile. Zero fill will be supplied
                    // since dstRaster is initialized to zero
                    //
                    continue;
                }


                if (! tileParamsSet) {
                    //
                    // These are constant for all tiles,
                    // so only set them once.
                    //
                    srcSM = (ComponentSampleModel)tile.getSampleModel();
                    srcPS = srcSM.getPixelStride();
                    srcSS = srcSM.getScanlineStride();
                    tileParamsSet = true;
                }


                //
                //  Intersect the tile and the rectangle

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    }


    private void cobbleShort(Rectangle bounds,
                            Raster dstRaster) {


        ComponentSampleModel dstSM =
            (ComponentSampleModel)dstRaster.getSampleModel();


        int startX = XToTileX(bounds.x);
        int startY = YToTileY(bounds.y);
        int rectXend = bounds.x + bounds.width - 1;
        int rectYend = bounds.y + bounds.height - 1;
        int endX = XToTileX(rectXend);
        int endY = YToTileY(rectYend);


        //
        //  Get parameters of destination raster
        //
        DataBufferShort dstDB = (DataBufferShort)dstRaster.getDataBuffer();
        short[] dst           = dstDB.getData();
        int dstPS            = dstSM.getPixelStride();
        int dstSS            = dstSM.getScanlineStride();


        boolean tileParamsSet = false;
        ComponentSampleModel srcSM = null;
        int srcPS=0, srcSS=0;
        int xOrg, yOrg;
        int srcX1, srcY1, srcX2, srcY2, srcW, srcH;


        for (int y = startY; y <= endY; y++) {
            for (int x = startX; x <= endX; x++) {
                Raster tile = getTile(x, y);
                if (tile == null) {
                    //
                    // Out-of-bounds tile. Zero fill will be supplied
                    // since dstRaster is initialized to zero
                    //
                    continue;
                }


                if (! tileParamsSet) {
                    //
                    // These are constant for all tiles,
                    // so only set them once.
                    //
                    srcSM = (ComponentSampleModel)tile.getSampleModel();
                    srcPS = srcSM.getPixelStride();
                    srcSS = srcSM.getScanlineStride();
                    tileParamsSet = true;
                }


                //
                //  Intersect the tile and the rectangle

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    }


    private void cobbleUShort(Rectangle bounds,
                            Raster dstRaster) {


        ComponentSampleModel dstSM =
            (ComponentSampleModel)dstRaster.getSampleModel();


        int startX = XToTileX(bounds.x);
        int startY = YToTileY(bounds.y);
        int rectXend = bounds.x + bounds.width - 1;
        int rectYend = bounds.y + bounds.height - 1;
        int endX = XToTileX(rectXend);
        int endY = YToTileY(rectYend);


        //
        //  Get parameters of destination raster
        //
        DataBufferUShort dstDB = (DataBufferUShort)dstRaster.getDataBuffer();
        short[] dst           = dstDB.getData();
        int dstPS            = dstSM.getPixelStride();
        int dstSS            = dstSM.getScanlineStride();


        boolean tileParamsSet = false;
        ComponentSampleModel srcSM = null;
        int srcPS=0, srcSS=0;
        int xOrg, yOrg;
        int srcX1, srcY1, srcX2, srcY2, srcW, srcH;


        for (int y = startY; y <= endY; y++) {
            for (int x = startX; x <= endX; x++) {
                Raster tile = getTile(x, y);
                if (tile == null) {
                    //
                    // Out-of-bounds tile. Zero fill will be supplied
                    // since dstRaster is initialized to zero
                    //
                    continue;
                }


                if (! tileParamsSet) {
                    //
                    // These are constant for all tiles,
                    // so only set them once.
                    //
                    srcSM = (ComponentSampleModel)tile.getSampleModel();
                    srcPS = srcSM.getPixelStride();
                    srcSS = srcSM.getScanlineStride();
                    tileParamsSet = true;
                }


                //
                //  Intersect the tile and the rectangle

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    }


    private void cobbleInt(Rectangle bounds,
                            Raster dstRaster) {


        ComponentSampleModel dstSM =
            (ComponentSampleModel)dstRaster.getSampleModel();


        int startX = XToTileX(bounds.x);
        int startY = YToTileY(bounds.y);
        int rectXend = bounds.x + bounds.width - 1;
        int rectYend = bounds.y + bounds.height - 1;
        int endX = XToTileX(rectXend);
        int endY = YToTileY(rectYend);


        //
        //  Get parameters of destination raster
        //
        DataBufferInt dstDB = (DataBufferInt)dstRaster.getDataBuffer();
        int[] dst           = dstDB.getData();
        int dstPS            = dstSM.getPixelStride();
        int dstSS            = dstSM.getScanlineStride();


        boolean tileParamsSet = false;
        ComponentSampleModel srcSM = null;
        int srcPS=0, srcSS=0;
        int xOrg, yOrg;
        int srcX1, srcY1, srcX2, srcY2, srcW, srcH;


        for (int y = startY; y <= endY; y++) {
            for (int x = startX; x <= endX; x++) {
                Raster tile = getTile(x, y);
                if (tile == null) {
                    //
                    // Out-of-bounds tile. Zero fill will be supplied
                    // since dstRaster is initialized to zero
                    //
                    continue;
                }


                if (! tileParamsSet) {
                    //
                    // These are constant for all tiles,
                    // so only set them once.
                    //
                    srcSM = (ComponentSampleModel)tile.getSampleModel();
                    srcPS = srcSM.getPixelStride();
                    srcSS = srcSM.getScanlineStride();
                    tileParamsSet = true;
                }


                //
                //  Intersect the tile and the rectangle

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