Examples with SampleModel java.awt.image.SampleModel used on opensource projects

Example 16 with SampleModel

use of java.awt.image.SampleModel in project jdk8u_jdk by JetBrains.

the class PNGImageWriterSpi method canEncodeImage.

public boolean canEncodeImage(ImageTypeSpecifier type) {
    SampleModel sampleModel = type.getSampleModel();
    ColorModel colorModel = type.getColorModel();
    // Find the maximum bit depth across all channels
    int[] sampleSize = sampleModel.getSampleSize();
    int bitDepth = sampleSize[0];
    for (int i = 1; i < sampleSize.length; i++) {
        if (sampleSize[i] > bitDepth) {
            bitDepth = sampleSize[i];
        }
    }
    // Ensure bitDepth is between 1 and 16
    if (bitDepth < 1 || bitDepth > 16) {
        return false;
    }
    // Check number of bands, alpha
    int numBands = sampleModel.getNumBands();
    if (numBands < 1 || numBands > 4) {
        return false;
    }
    boolean hasAlpha = colorModel.hasAlpha();
    // the check below to fail and return false.
    if (colorModel instanceof IndexColorModel) {
        return true;
    }
    if ((numBands == 1 || numBands == 3) && hasAlpha) {
        return false;
    }
    if ((numBands == 2 || numBands == 4) && !hasAlpha) {
        return false;
    }
    return true;
}

Example 17 with SampleModel

use of java.awt.image.SampleModel in project jdk8u_jdk by JetBrains.

the class PNGMetadata method initialize.

/**
     * Sets the IHDR_bitDepth and IHDR_colorType variables.
     * The <code>numBands</code> parameter is necessary since
     * we may only be writing a subset of the image bands.
     */
public void initialize(ImageTypeSpecifier imageType, int numBands) {
    ColorModel colorModel = imageType.getColorModel();
    SampleModel sampleModel = imageType.getSampleModel();
    // Initialize IHDR_bitDepth
    int[] sampleSize = sampleModel.getSampleSize();
    int bitDepth = sampleSize[0];
    // Fixes bug 4413109
    for (int i = 1; i < sampleSize.length; i++) {
        if (sampleSize[i] > bitDepth) {
            bitDepth = sampleSize[i];
        }
    }
    // Multi-channel images must have a bit depth of 8 or 16
    if (sampleSize.length > 1 && bitDepth < 8) {
        bitDepth = 8;
    }
    // Round bit depth up to a power of 2
    if (bitDepth > 2 && bitDepth < 4) {
        bitDepth = 4;
    } else if (bitDepth > 4 && bitDepth < 8) {
        bitDepth = 8;
    } else if (bitDepth > 8 && bitDepth < 16) {
        bitDepth = 16;
    } else if (bitDepth > 16) {
        throw new RuntimeException("bitDepth > 16!");
    }
    IHDR_bitDepth = bitDepth;
    // Initialize IHDR_colorType
    if (colorModel instanceof IndexColorModel) {
        IndexColorModel icm = (IndexColorModel) colorModel;
        int size = icm.getMapSize();
        byte[] reds = new byte[size];
        icm.getReds(reds);
        byte[] greens = new byte[size];
        icm.getGreens(greens);
        byte[] blues = new byte[size];
        icm.getBlues(blues);
        // Determine whether the color tables are actually a gray ramp
        // if the color type has not been set previously
        boolean isGray = false;
        if (!IHDR_present || (IHDR_colorType != PNGImageReader.PNG_COLOR_PALETTE)) {
            isGray = true;
            int scale = 255 / ((1 << IHDR_bitDepth) - 1);
            for (int i = 0; i < size; i++) {
                byte red = reds[i];
                if ((red != (byte) (i * scale)) || (red != greens[i]) || (red != blues[i])) {
                    isGray = false;
                    break;
                }
            }
        }
        // Determine whether transparency exists
        boolean hasAlpha = colorModel.hasAlpha();
        byte[] alpha = null;
        if (hasAlpha) {
            alpha = new byte[size];
            icm.getAlphas(alpha);
        }
        if (isGray && hasAlpha && (bitDepth == 8 || bitDepth == 16)) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_GRAY_ALPHA;
        } else if (isGray && !hasAlpha) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_GRAY;
        } else {
            IHDR_colorType = PNGImageReader.PNG_COLOR_PALETTE;
            PLTE_present = true;
            PLTE_order = null;
            PLTE_red = (byte[]) reds.clone();
            PLTE_green = (byte[]) greens.clone();
            PLTE_blue = (byte[]) blues.clone();
            if (hasAlpha) {
                tRNS_present = true;
                tRNS_colorType = PNGImageReader.PNG_COLOR_PALETTE;
                PLTE_order = new int[alpha.length];
                // Reorder the palette so that non-opaque entries
                // come first.  Since the tRNS chunk does not have
                // to store trailing 255's, this can save a
                // considerable amount of space when encoding
                // images with only one transparent pixel value,
                // e.g., images from GIF sources.
                byte[] newAlpha = new byte[alpha.length];
                // Scan for non-opaque entries and assign them
                // positions starting at 0.
                int newIndex = 0;
                for (int i = 0; i < alpha.length; i++) {
                    if (alpha[i] != (byte) 255) {
                        PLTE_order[i] = newIndex;
                        newAlpha[newIndex] = alpha[i];
                        ++newIndex;
                    }
                }
                int numTransparent = newIndex;
                // positions following the non-opaque entries.
                for (int i = 0; i < alpha.length; i++) {
                    if (alpha[i] == (byte) 255) {
                        PLTE_order[i] = newIndex++;
                    }
                }
                // Reorder the palettes
                byte[] oldRed = PLTE_red;
                byte[] oldGreen = PLTE_green;
                byte[] oldBlue = PLTE_blue;
                // All have the same length
                int len = oldRed.length;
                PLTE_red = new byte[len];
                PLTE_green = new byte[len];
                PLTE_blue = new byte[len];
                for (int i = 0; i < len; i++) {
                    PLTE_red[PLTE_order[i]] = oldRed[i];
                    PLTE_green[PLTE_order[i]] = oldGreen[i];
                    PLTE_blue[PLTE_order[i]] = oldBlue[i];
                }
                // Copy only the transparent entries into tRNS_alpha
                tRNS_alpha = new byte[numTransparent];
                System.arraycopy(newAlpha, 0, tRNS_alpha, 0, numTransparent);
            }
        }
    } else {
        if (numBands == 1) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_GRAY;
        } else if (numBands == 2) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_GRAY_ALPHA;
        } else if (numBands == 3) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_RGB;
        } else if (numBands == 4) {
            IHDR_colorType = PNGImageReader.PNG_COLOR_RGB_ALPHA;
        } else {
            throw new RuntimeException("Number of bands not 1-4!");
        }
    }
    IHDR_present = true;
}

Example 18 with SampleModel

use of java.awt.image.SampleModel in project jdk8u_jdk by JetBrains.

the class PNGImageWriter method write.

public void write(IIOMetadata streamMetadata, IIOImage image, ImageWriteParam param) throws IIOException {
    if (stream == null) {
        throw new IllegalStateException("output == null!");
    }
    if (image == null) {
        throw new IllegalArgumentException("image == null!");
    }
    if (image.hasRaster()) {
        throw new UnsupportedOperationException("image has a Raster!");
    }
    RenderedImage im = image.getRenderedImage();
    SampleModel sampleModel = im.getSampleModel();
    this.numBands = sampleModel.getNumBands();
    // Set source region and subsampling to default values
    this.sourceXOffset = im.getMinX();
    this.sourceYOffset = im.getMinY();
    this.sourceWidth = im.getWidth();
    this.sourceHeight = im.getHeight();
    this.sourceBands = null;
    this.periodX = 1;
    this.periodY = 1;
    if (param != null) {
        // Get source region and subsampling factors
        Rectangle sourceRegion = param.getSourceRegion();
        if (sourceRegion != null) {
            Rectangle imageBounds = new Rectangle(im.getMinX(), im.getMinY(), im.getWidth(), im.getHeight());
            // Clip to actual image bounds
            sourceRegion = sourceRegion.intersection(imageBounds);
            sourceXOffset = sourceRegion.x;
            sourceYOffset = sourceRegion.y;
            sourceWidth = sourceRegion.width;
            sourceHeight = sourceRegion.height;
        }
        // Adjust for subsampling offsets
        int gridX = param.getSubsamplingXOffset();
        int gridY = param.getSubsamplingYOffset();
        sourceXOffset += gridX;
        sourceYOffset += gridY;
        sourceWidth -= gridX;
        sourceHeight -= gridY;
        // Get subsampling factors
        periodX = param.getSourceXSubsampling();
        periodY = param.getSourceYSubsampling();
        int[] sBands = param.getSourceBands();
        if (sBands != null) {
            sourceBands = sBands;
            numBands = sourceBands.length;
        }
    }
    // Compute output dimensions
    int destWidth = (sourceWidth + periodX - 1) / periodX;
    int destHeight = (sourceHeight + periodY - 1) / periodY;
    if (destWidth <= 0 || destHeight <= 0) {
        throw new IllegalArgumentException("Empty source region!");
    }
    // Compute total number of pixels for progress notification
    this.totalPixels = destWidth * destHeight;
    this.pixelsDone = 0;
    // Create metadata
    IIOMetadata imd = image.getMetadata();
    if (imd != null) {
        metadata = (PNGMetadata) convertImageMetadata(imd, ImageTypeSpecifier.createFromRenderedImage(im), null);
    } else {
        metadata = new PNGMetadata();
    }
    if (param != null) {
        // Use Adam7 interlacing if set in write param
        switch(param.getProgressiveMode()) {
            case ImageWriteParam.MODE_DEFAULT:
                metadata.IHDR_interlaceMethod = 1;
                break;
            case ImageWriteParam.MODE_DISABLED:
                metadata.IHDR_interlaceMethod = 0;
                break;
        }
    }
    // Initialize bitDepth and colorType
    metadata.initialize(new ImageTypeSpecifier(im), numBands);
    // Overwrite IHDR width and height values with values from image
    metadata.IHDR_width = destWidth;
    metadata.IHDR_height = destHeight;
    this.bpp = numBands * ((metadata.IHDR_bitDepth == 16) ? 2 : 1);
    // Initialize scaling tables for this image
    initializeScaleTables(sampleModel.getSampleSize());
    clearAbortRequest();
    processImageStarted(0);
    try {
        write_magic();
        write_IHDR();
        write_cHRM();
        write_gAMA();
        write_iCCP();
        write_sBIT();
        write_sRGB();
        write_PLTE();
        write_hIST();
        write_tRNS();
        write_bKGD();
        write_pHYs();
        write_sPLT();
        write_tIME();
        write_tEXt();
        write_iTXt();
        write_zTXt();
        writeUnknownChunks();
        write_IDAT(im);
        if (abortRequested()) {
            processWriteAborted();
        } else {
            // Finish up and inform the listeners we are done
            writeIEND();
            processImageComplete();
        }
    } catch (IOException e) {
        throw new IIOException("I/O error writing PNG file!", e);
    }
}

Example 19 with SampleModel

use of java.awt.image.SampleModel in project jdk8u_jdk by JetBrains.

the class RenderableImageProducer method run.

/**
     * The runnable method for this class. This will produce an image using
     * the current RenderableImage and RenderContext and send it to all the
     * ImageConsumer currently registered with this class.
     */
public void run() {
    // First get the rendered image
    RenderedImage rdrdImage;
    if (rc != null) {
        rdrdImage = rdblImage.createRendering(rc);
    } else {
        rdrdImage = rdblImage.createDefaultRendering();
    }
    // And its ColorModel
    ColorModel colorModel = rdrdImage.getColorModel();
    Raster raster = rdrdImage.getData();
    SampleModel sampleModel = raster.getSampleModel();
    DataBuffer dataBuffer = raster.getDataBuffer();
    if (colorModel == null) {
        colorModel = ColorModel.getRGBdefault();
    }
    int minX = raster.getMinX();
    int minY = raster.getMinY();
    int width = raster.getWidth();
    int height = raster.getHeight();
    Enumeration icList;
    ImageConsumer ic;
    // Set up the ImageConsumers
    icList = ics.elements();
    while (icList.hasMoreElements()) {
        ic = (ImageConsumer) icList.nextElement();
        ic.setDimensions(width, height);
        ic.setHints(ImageConsumer.TOPDOWNLEFTRIGHT | ImageConsumer.COMPLETESCANLINES | ImageConsumer.SINGLEPASS | ImageConsumer.SINGLEFRAME);
    }
    // Get RGB pixels from the raster scanline by scanline and
    // send to consumers.
    int[] pix = new int[width];
    int i, j;
    int numBands = sampleModel.getNumBands();
    int[] tmpPixel = new int[numBands];
    for (j = 0; j < height; j++) {
        for (i = 0; i < width; i++) {
            sampleModel.getPixel(i, j, tmpPixel, dataBuffer);
            pix[i] = colorModel.getDataElement(tmpPixel, 0);
        }
        // Now send the scanline to the Consumers
        icList = ics.elements();
        while (icList.hasMoreElements()) {
            ic = (ImageConsumer) icList.nextElement();
            ic.setPixels(0, j, width, 1, colorModel, pix, 0, width);
        }
    }
    // Now tell the consumers we're done.
    icList = ics.elements();
    while (icList.hasMoreElements()) {
        ic = (ImageConsumer) icList.nextElement();
        ic.imageComplete(ImageConsumer.STATICIMAGEDONE);
    }
}

Example 20 with SampleModel

use of java.awt.image.SampleModel in project jdk8u_jdk by JetBrains.

the class BMPImageWriter method write.

public void write(IIOMetadata streamMetadata, IIOImage image, ImageWriteParam param) throws IOException {
    if (stream == null) {
        throw new IllegalStateException(I18N.getString("BMPImageWriter7"));
    }
    if (image == null) {
        throw new IllegalArgumentException(I18N.getString("BMPImageWriter8"));
    }
    clearAbortRequest();
    processImageStarted(0);
    if (param == null)
        param = getDefaultWriteParam();
    BMPImageWriteParam bmpParam = (BMPImageWriteParam) param;
    // Default is using 24 bits per pixel.
    int bitsPerPixel = 24;
    boolean isPalette = false;
    int paletteEntries = 0;
    IndexColorModel icm = null;
    RenderedImage input = null;
    Raster inputRaster = null;
    boolean writeRaster = image.hasRaster();
    Rectangle sourceRegion = param.getSourceRegion();
    SampleModel sampleModel = null;
    ColorModel colorModel = null;
    compImageSize = 0;
    if (writeRaster) {
        inputRaster = image.getRaster();
        sampleModel = inputRaster.getSampleModel();
        colorModel = ImageUtil.createColorModel(null, sampleModel);
        if (sourceRegion == null)
            sourceRegion = inputRaster.getBounds();
        else
            sourceRegion = sourceRegion.intersection(inputRaster.getBounds());
    } else {
        input = image.getRenderedImage();
        sampleModel = input.getSampleModel();
        colorModel = input.getColorModel();
        Rectangle rect = new Rectangle(input.getMinX(), input.getMinY(), input.getWidth(), input.getHeight());
        if (sourceRegion == null)
            sourceRegion = rect;
        else
            sourceRegion = sourceRegion.intersection(rect);
    }
    IIOMetadata imageMetadata = image.getMetadata();
    BMPMetadata bmpImageMetadata = null;
    if (imageMetadata != null && imageMetadata instanceof BMPMetadata) {
        bmpImageMetadata = (BMPMetadata) imageMetadata;
    } else {
        ImageTypeSpecifier imageType = new ImageTypeSpecifier(colorModel, sampleModel);
        bmpImageMetadata = (BMPMetadata) getDefaultImageMetadata(imageType, param);
    }
    if (sourceRegion.isEmpty())
        throw new RuntimeException(I18N.getString("BMPImageWrite0"));
    int scaleX = param.getSourceXSubsampling();
    int scaleY = param.getSourceYSubsampling();
    int xOffset = param.getSubsamplingXOffset();
    int yOffset = param.getSubsamplingYOffset();
    // cache the data type;
    int dataType = sampleModel.getDataType();
    sourceRegion.translate(xOffset, yOffset);
    sourceRegion.width -= xOffset;
    sourceRegion.height -= yOffset;
    int minX = sourceRegion.x / scaleX;
    int minY = sourceRegion.y / scaleY;
    w = (sourceRegion.width + scaleX - 1) / scaleX;
    h = (sourceRegion.height + scaleY - 1) / scaleY;
    xOffset = sourceRegion.x % scaleX;
    yOffset = sourceRegion.y % scaleY;
    Rectangle destinationRegion = new Rectangle(minX, minY, w, h);
    boolean noTransform = destinationRegion.equals(sourceRegion);
    // Raw data can only handle bytes, everything greater must be ASCII.
    int[] sourceBands = param.getSourceBands();
    boolean noSubband = true;
    int numBands = sampleModel.getNumBands();
    if (sourceBands != null) {
        sampleModel = sampleModel.createSubsetSampleModel(sourceBands);
        colorModel = null;
        noSubband = false;
        numBands = sampleModel.getNumBands();
    } else {
        sourceBands = new int[numBands];
        for (int i = 0; i < numBands; i++) sourceBands[i] = i;
    }
    int[] bandOffsets = null;
    boolean bgrOrder = true;
    if (sampleModel instanceof ComponentSampleModel) {
        bandOffsets = ((ComponentSampleModel) sampleModel).getBandOffsets();
        if (sampleModel instanceof BandedSampleModel) {
            // for images with BandedSampleModel we can not work
            //  with raster directly and must use writePixels()
            bgrOrder = false;
        } else {
            // In any other case we must use writePixels()
            for (int i = 0; i < bandOffsets.length; i++) {
                bgrOrder &= (bandOffsets[i] == (bandOffsets.length - i - 1));
            }
        }
    } else {
        if (sampleModel instanceof SinglePixelPackedSampleModel) {
            // BugId 4892214: we can not work with raster directly
            // if image have different color order than RGB.
            // We should use writePixels() for such images.
            int[] bitOffsets = ((SinglePixelPackedSampleModel) sampleModel).getBitOffsets();
            for (int i = 0; i < bitOffsets.length - 1; i++) {
                bgrOrder &= bitOffsets[i] > bitOffsets[i + 1];
            }
        }
    }
    if (bandOffsets == null) {
        // we will use getPixels() to extract pixel data for writePixels()
        // Please note that getPixels() provides rgb bands order.
        bandOffsets = new int[numBands];
        for (int i = 0; i < numBands; i++) bandOffsets[i] = i;
    }
    noTransform &= bgrOrder;
    int[] sampleSize = sampleModel.getSampleSize();
    //XXX: check more
    // Number of bytes that a scanline for the image written out will have.
    int destScanlineBytes = w * numBands;
    switch(bmpParam.getCompressionMode()) {
        case ImageWriteParam.MODE_EXPLICIT:
            compressionType = BMPCompressionTypes.getType(bmpParam.getCompressionType());
            break;
        case ImageWriteParam.MODE_COPY_FROM_METADATA:
            compressionType = bmpImageMetadata.compression;
            break;
        case ImageWriteParam.MODE_DEFAULT:
            compressionType = getPreferredCompressionType(colorModel, sampleModel);
            break;
        default:
            // ImageWriteParam.MODE_DISABLED:
            compressionType = BI_RGB;
    }
    if (!canEncodeImage(compressionType, colorModel, sampleModel)) {
        throw new IOException("Image can not be encoded with compression type " + BMPCompressionTypes.getName(compressionType));
    }
    byte[] r = null, g = null, b = null, a = null;
    if (compressionType == BI_BITFIELDS) {
        bitsPerPixel = DataBuffer.getDataTypeSize(sampleModel.getDataType());
        if (bitsPerPixel != 16 && bitsPerPixel != 32) {
            // we should use 32bpp images in case of BI_BITFIELD
            // compression to avoid color conversion artefacts
            bitsPerPixel = 32;
            // Setting this flag to false ensures that generic
            // writePixels() will be used to store image data
            noTransform = false;
        }
        destScanlineBytes = w * bitsPerPixel + 7 >> 3;
        isPalette = true;
        paletteEntries = 3;
        r = new byte[paletteEntries];
        g = new byte[paletteEntries];
        b = new byte[paletteEntries];
        a = new byte[paletteEntries];
        int rmask = 0x00ff0000;
        int gmask = 0x0000ff00;
        int bmask = 0x000000ff;
        if (bitsPerPixel == 16) {
            /* NB: canEncodeImage() ensures we have image of
                 * either USHORT_565_RGB or USHORT_555_RGB type here.
                 * Technically, it should work for other direct color
                 * model types but it might be non compatible with win98
                 * and friends.
                 */
            if (colorModel instanceof DirectColorModel) {
                DirectColorModel dcm = (DirectColorModel) colorModel;
                rmask = dcm.getRedMask();
                gmask = dcm.getGreenMask();
                bmask = dcm.getBlueMask();
            } else {
                // an exception related to unsupported image format
                throw new IOException("Image can not be encoded with " + "compression type " + BMPCompressionTypes.getName(compressionType));
            }
        }
        writeMaskToPalette(rmask, 0, r, g, b, a);
        writeMaskToPalette(gmask, 1, r, g, b, a);
        writeMaskToPalette(bmask, 2, r, g, b, a);
        if (!noTransform) {
            // prepare info for writePixels procedure
            bitMasks = new int[3];
            bitMasks[0] = rmask;
            bitMasks[1] = gmask;
            bitMasks[2] = bmask;
            bitPos = new int[3];
            bitPos[0] = firstLowBit(rmask);
            bitPos[1] = firstLowBit(gmask);
            bitPos[2] = firstLowBit(bmask);
        }
        if (colorModel instanceof IndexColorModel) {
            icm = (IndexColorModel) colorModel;
        }
    } else {
        // handle BI_RGB compression
        if (colorModel instanceof IndexColorModel) {
            isPalette = true;
            icm = (IndexColorModel) colorModel;
            paletteEntries = icm.getMapSize();
            if (paletteEntries <= 2) {
                bitsPerPixel = 1;
                destScanlineBytes = w + 7 >> 3;
            } else if (paletteEntries <= 16) {
                bitsPerPixel = 4;
                destScanlineBytes = w + 1 >> 1;
            } else if (paletteEntries <= 256) {
                bitsPerPixel = 8;
            } else {
                // Cannot be written as a Palette image. So write out as
                // 24 bit image.
                bitsPerPixel = 24;
                isPalette = false;
                paletteEntries = 0;
                destScanlineBytes = w * 3;
            }
            if (isPalette == true) {
                r = new byte[paletteEntries];
                g = new byte[paletteEntries];
                b = new byte[paletteEntries];
                a = new byte[paletteEntries];
                icm.getAlphas(a);
                icm.getReds(r);
                icm.getGreens(g);
                icm.getBlues(b);
            }
        } else {
            // Grey scale images
            if (numBands == 1) {
                isPalette = true;
                paletteEntries = 256;
                bitsPerPixel = sampleSize[0];
                destScanlineBytes = (w * bitsPerPixel + 7 >> 3);
                r = new byte[256];
                g = new byte[256];
                b = new byte[256];
                a = new byte[256];
                for (int i = 0; i < 256; i++) {
                    r[i] = (byte) i;
                    g[i] = (byte) i;
                    b[i] = (byte) i;
                    a[i] = (byte) 255;
                }
            } else {
                if (sampleModel instanceof SinglePixelPackedSampleModel && noSubband) {
                    /* NB: the actual pixel size can be smaller than
                         * size of used DataBuffer element.
                         * For example: in case of TYPE_INT_RGB actual pixel
                         * size is 24 bits, but size of DataBuffere element
                         * is 32 bits
                         */
                    int[] sample_sizes = sampleModel.getSampleSize();
                    bitsPerPixel = 0;
                    for (int size : sample_sizes) {
                        bitsPerPixel += size;
                    }
                    bitsPerPixel = roundBpp(bitsPerPixel);
                    if (bitsPerPixel != DataBuffer.getDataTypeSize(sampleModel.getDataType())) {
                        noTransform = false;
                    }
                    destScanlineBytes = w * bitsPerPixel + 7 >> 3;
                }
            }
        }
    }
    // actual writing of image data
    int fileSize = 0;
    int offset = 0;
    int headerSize = 0;
    int imageSize = 0;
    int xPelsPerMeter = 0;
    int yPelsPerMeter = 0;
    int colorsUsed = 0;
    int colorsImportant = paletteEntries;
    // Calculate padding for each scanline
    int padding = destScanlineBytes % 4;
    if (padding != 0) {
        padding = 4 - padding;
    }
    // FileHeader is 14 bytes, BitmapHeader is 40 bytes,
    // add palette size and that is where the data will begin
    offset = 54 + paletteEntries * 4;
    imageSize = (destScanlineBytes + padding) * h;
    fileSize = imageSize + offset;
    headerSize = 40;
    long headPos = stream.getStreamPosition();
    writeFileHeader(fileSize, offset);
    /* According to MSDN description, the top-down image layout
         * is allowed only if compression type is BI_RGB or BI_BITFIELDS.
         * Images with any other compression type must be wrote in the
         * bottom-up layout.
         */
    if (compressionType == BI_RGB || compressionType == BI_BITFIELDS) {
        isTopDown = bmpParam.isTopDown();
    } else {
        isTopDown = false;
    }
    writeInfoHeader(headerSize, bitsPerPixel);
    // compression
    stream.writeInt(compressionType);
    // imageSize
    stream.writeInt(imageSize);
    // xPelsPerMeter
    stream.writeInt(xPelsPerMeter);
    // yPelsPerMeter
    stream.writeInt(yPelsPerMeter);
    // Colors Used
    stream.writeInt(colorsUsed);
    // Colors Important
    stream.writeInt(colorsImportant);
    // palette
    if (isPalette == true) {
        // write palette
        if (compressionType == BI_BITFIELDS) {
            // write masks for red, green and blue components.
            for (int i = 0; i < 3; i++) {
                int mask = (a[i] & 0xFF) + ((r[i] & 0xFF) * 0x100) + ((g[i] & 0xFF) * 0x10000) + ((b[i] & 0xFF) * 0x1000000);
                stream.writeInt(mask);
            }
        } else {
            for (int i = 0; i < paletteEntries; i++) {
                stream.writeByte(b[i]);
                stream.writeByte(g[i]);
                stream.writeByte(r[i]);
                stream.writeByte(a[i]);
            }
        }
    }
    // Writing of actual image data
    int scanlineBytes = w * numBands;
    // Buffer for up to 8 rows of pixels
    int[] pixels = new int[scanlineBytes * scaleX];
    // Also create a buffer to hold one line of the data
    // to be written to the file, so we can use array writes.
    bpixels = new byte[destScanlineBytes];
    int l;
    if (compressionType == BI_JPEG || compressionType == BI_PNG) {
        // prepare embedded buffer
        embedded_stream = new ByteArrayOutputStream();
        writeEmbedded(image, bmpParam);
        // update the file/image Size
        embedded_stream.flush();
        imageSize = embedded_stream.size();
        long endPos = stream.getStreamPosition();
        fileSize = (int) (offset + imageSize);
        stream.seek(headPos);
        writeSize(fileSize, 2);
        stream.seek(headPos);
        writeSize(imageSize, 34);
        stream.seek(endPos);
        stream.write(embedded_stream.toByteArray());
        embedded_stream = null;
        if (abortRequested()) {
            processWriteAborted();
        } else {
            processImageComplete();
            stream.flushBefore(stream.getStreamPosition());
        }
        return;
    }
    int maxBandOffset = bandOffsets[0];
    for (int i = 1; i < bandOffsets.length; i++) if (bandOffsets[i] > maxBandOffset)
        maxBandOffset = bandOffsets[i];
    int[] pixel = new int[maxBandOffset + 1];
    int destScanlineLength = destScanlineBytes;
    if (noTransform && noSubband) {
        destScanlineLength = destScanlineBytes / (DataBuffer.getDataTypeSize(dataType) >> 3);
    }
    for (int i = 0; i < h; i++) {
        if (abortRequested()) {
            break;
        }
        int row = minY + i;
        if (!isTopDown)
            row = minY + h - i - 1;
        // Get the pixels
        Raster src = inputRaster;
        Rectangle srcRect = new Rectangle(minX * scaleX + xOffset, row * scaleY + yOffset, (w - 1) * scaleX + 1, 1);
        if (!writeRaster)
            src = input.getData(srcRect);
        if (noTransform && noSubband) {
            SampleModel sm = src.getSampleModel();
            int pos = 0;
            int startX = srcRect.x - src.getSampleModelTranslateX();
            int startY = srcRect.y - src.getSampleModelTranslateY();
            if (sm instanceof ComponentSampleModel) {
                ComponentSampleModel csm = (ComponentSampleModel) sm;
                pos = csm.getOffset(startX, startY, 0);
                for (int nb = 1; nb < csm.getNumBands(); nb++) {
                    if (pos > csm.getOffset(startX, startY, nb)) {
                        pos = csm.getOffset(startX, startY, nb);
                    }
                }
            } else if (sm instanceof MultiPixelPackedSampleModel) {
                MultiPixelPackedSampleModel mppsm = (MultiPixelPackedSampleModel) sm;
                pos = mppsm.getOffset(startX, startY);
            } else if (sm instanceof SinglePixelPackedSampleModel) {
                SinglePixelPackedSampleModel sppsm = (SinglePixelPackedSampleModel) sm;
                pos = sppsm.getOffset(startX, startY);
            }
            if (compressionType == BI_RGB || compressionType == BI_BITFIELDS) {
                switch(dataType) {
                    case DataBuffer.TYPE_BYTE:
                        byte[] bdata = ((DataBufferByte) src.getDataBuffer()).getData();
                        stream.write(bdata, pos, destScanlineLength);
                        break;
                    case DataBuffer.TYPE_SHORT:
                        short[] sdata = ((DataBufferShort) src.getDataBuffer()).getData();
                        stream.writeShorts(sdata, pos, destScanlineLength);
                        break;
                    case DataBuffer.TYPE_USHORT:
                        short[] usdata = ((DataBufferUShort) src.getDataBuffer()).getData();
                        stream.writeShorts(usdata, pos, destScanlineLength);
                        break;
                    case DataBuffer.TYPE_INT:
                        int[] idata = ((DataBufferInt) src.getDataBuffer()).getData();
                        stream.writeInts(idata, pos, destScanlineLength);
                        break;
                }
                for (int k = 0; k < padding; k++) {
                    stream.writeByte(0);
                }
            } else if (compressionType == BI_RLE4) {
                if (bpixels == null || bpixels.length < scanlineBytes)
                    bpixels = new byte[scanlineBytes];
                src.getPixels(srcRect.x, srcRect.y, srcRect.width, srcRect.height, pixels);
                for (int h = 0; h < scanlineBytes; h++) {
                    bpixels[h] = (byte) pixels[h];
                }
                encodeRLE4(bpixels, scanlineBytes);
            } else if (compressionType == BI_RLE8) {
                //System.arraycopy(bdata, pos, bpixels, 0, scanlineBytes);
                if (bpixels == null || bpixels.length < scanlineBytes)
                    bpixels = new byte[scanlineBytes];
                src.getPixels(srcRect.x, srcRect.y, srcRect.width, srcRect.height, pixels);
                for (int h = 0; h < scanlineBytes; h++) {
                    bpixels[h] = (byte) pixels[h];
                }
                encodeRLE8(bpixels, scanlineBytes);
            }
        } else {
            src.getPixels(srcRect.x, srcRect.y, srcRect.width, srcRect.height, pixels);
            if (scaleX != 1 || maxBandOffset != numBands - 1) {
                for (int j = 0, k = 0, n = 0; j < w; j++, k += scaleX * numBands, n += numBands) {
                    System.arraycopy(pixels, k, pixel, 0, pixel.length);
                    for (int m = 0; m < numBands; m++) {
                        // pixel data is provided here in RGB order
                        pixels[n + m] = pixel[sourceBands[m]];
                    }
                }
            }
            writePixels(0, scanlineBytes, bitsPerPixel, pixels, padding, numBands, icm);
        }
        processImageProgress(100.0f * (((float) i) / ((float) h)));
    }
    if (compressionType == BI_RLE4 || compressionType == BI_RLE8) {
        // Write the RLE EOF marker and
        stream.writeByte(0);
        stream.writeByte(1);
        incCompImageSize(2);
        // update the file/image Size
        imageSize = compImageSize;
        fileSize = compImageSize + offset;
        long endPos = stream.getStreamPosition();
        stream.seek(headPos);
        writeSize(fileSize, 2);
        stream.seek(headPos);
        writeSize(imageSize, 34);
        stream.seek(endPos);
    }
    if (abortRequested()) {
        processWriteAborted();
    } else {
        processImageComplete();
        stream.flushBefore(stream.getStreamPosition());
    }
}