Example usage for java.awt.image BufferedImage getAlphaRaster

Introduction

In this page you can find the example usage for java.awt.image BufferedImage getAlphaRaster.

Prototype

public WritableRaster getAlphaRaster() 

Source Link

Document

Returns a WritableRaster representing the alpha channel for BufferedImage objects with ColorModel objects that support a separate spatial alpha channel, such as ComponentColorModel and DirectColorModel .

Usage

From source file:de.fhg.igd.swingrcp.SwingRCPUtilities.java

/**
 * Applies the given transparency mask to a buffered image. Always creates a
 * new buffered image containing an alpha channel. Copies the old image into
 * the new one and then sets the alpha pixels according to the given mask.
 * /*from   ww  w. j a  v  a  2s .  c  o m*/
 * @param img the old image
 * @param mask the alpha mask
 * @return the new image with alpha channel applied
 * @throws IllegalArgumentException if the image's size does not match the
 *             mask's size
 */
public static BufferedImage applyTransparencyMask(BufferedImage img, ImageData mask) {
    if (mask.width != img.getWidth() || mask.height != img.getHeight()) {
        throw new IllegalArgumentException("Image size does not match the mask size");
    }

    // copy image and also convert to RGBA
    BufferedImage result = new BufferedImage(img.getWidth(), img.getHeight(), BufferedImage.TYPE_INT_ARGB);
    Graphics g = result.getGraphics();
    g.drawImage(img, 0, 0, null);

    WritableRaster alphaRaster = result.getAlphaRaster();
    int alpha0[] = new int[] { 0 };
    int alpha255[] = new int[] { 255 };
    for (int y = 0; y < img.getHeight(); y++) {
        for (int x = 0; x < img.getWidth(); x++) {
            alphaRaster.setPixel(x, y, mask.getPixel(x, y) == 0 ? alpha0 : alpha255);
        }
    }

    return result;
}

---

From source file:oct.util.Util.java

/**
 * Convert the supplied image to a 2D pixel array such that an (X,Y) value
 * indexes as array[x][y].// w  w w.j  av  a2s  . c  o m
 *
 * Credit for this method goes to Stack Overflow user Mota and their post
 * here:
 * http://stackoverflow.com/questions/6524196/java-get-pixel-array-from-image
 * for this implementation.
 *
 * This method will return the red, green and blue values directly for each
 * pixel, and if there is an alpha channel it will add the alpha value.
 * Using this method is harder in terms of calculating indices, but is much
 * faster than using getRGB to build this same array.
 *
 * @param image
 * @return
 */
public static int[][] convertTo2D(BufferedImage image) {

    final byte[] pixels = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
    final int width = image.getWidth();
    final int height = image.getHeight();
    final boolean hasAlphaChannel = image.getAlphaRaster() != null;

    int[][] result = new int[width][height];
    if (hasAlphaChannel) {
        final int pixelLength = 4;
        for (int pixel = 0, row = 0, col = 0; pixel < pixels.length; pixel += pixelLength) {
            int argb = 0;
            argb += (((int) pixels[pixel] & 0xff) << 24); // alpha
            argb += ((int) pixels[pixel + 1] & 0xff); // blue
            argb += (((int) pixels[pixel + 2] & 0xff) << 8); // green
            argb += (((int) pixels[pixel + 3] & 0xff) << 16); // red
            result[col][row] = argb;
            col++;
            if (col == width) {
                col = 0;
                row++;
            }
        }
    } else {
        final int pixelLength = 3;
        for (int pixel = 0, row = 0, col = 0; pixel < pixels.length; pixel += pixelLength) {
            int argb = 0;
            argb += -16777216; // 255 alpha
            argb += ((int) pixels[pixel] & 0xff); // blue
            argb += (((int) pixels[pixel + 1] & 0xff) << 8); // green
            argb += (((int) pixels[pixel + 2] & 0xff) << 16); // red
            result[col][row] = argb;
            col++;
            if (col == width) {
                col = 0;
                row++;
            }
        }
    }

    return result;
}

---

From source file:com.flexive.shared.media.impl.FxMediaNativeEngine.java

public static BufferedImage scale(BufferedImage bi, int width, int height) {
    BufferedImage bi2;//  w w w. j a v  a  2s  . c o m
    int scaleWidth = bi.getWidth(null);
    int scaleHeight = bi.getHeight(null);
    double scaleX = (double) width / scaleWidth;
    double scaleY = (double) height / scaleHeight;
    double scale = Math.min(scaleX, scaleY);
    scaleWidth = (int) ((double) scaleWidth * scale);
    scaleHeight = (int) ((double) scaleHeight * scale);
    Image scaledImage;
    if (HEADLESS) {
        // create a new buffered image, don't rely on a local graphics system (headless mode)
        final int type;
        if (bi.getType() != BufferedImage.TYPE_CUSTOM) {
            type = bi.getType();
        } else if (bi.getAlphaRaster() != null) {
            // alpha channel available
            type = BufferedImage.TYPE_INT_ARGB;
        } else {
            type = BufferedImage.TYPE_INT_RGB;
        }
        bi2 = new BufferedImage(scaleWidth, scaleHeight, type);
    } else {
        GraphicsConfiguration gc = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice()
                .getDefaultConfiguration();
        bi2 = gc.createCompatibleImage(scaleWidth, scaleHeight, bi.getTransparency());
    }
    Graphics2D g = bi2.createGraphics();
    if (scale < 0.3 && Math.max(scaleWidth, scaleHeight) < 500) {
        scaledImage = bi.getScaledInstance(scaleWidth, scaleHeight, Image.SCALE_SMOOTH);
        new ImageIcon(scaledImage).getImage();
        g.drawImage(scaledImage, 0, 0, scaleWidth, scaleHeight, null);
    } else {
        g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
        g.drawImage(bi, 0, 0, scaleWidth, scaleHeight, null);
    }
    g.dispose();
    return bi2;
}

---

From source file:at.gv.egiz.pdfas.lib.impl.stamping.pdfbox.PDFAsVisualSignatureBuilder.java

private void readTableResources(PDFBoxTable table, PDDocument template) throws PdfAsException, IOException {

    float[] colsSizes = table.getColsRelativeWith();
    int max_cols = table.getColCount();
    float padding = table.getPadding();
    if (colsSizes == null) {
        colsSizes = new float[max_cols];
        // set the column ratio for all columns to 1
        for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) {
            colsSizes[cols_idx] = 1;//from   w w w.  j  a  va2  s  .  c  om
        }
    }

    logger.debug("TOTAL Width: " + table.getWidth());

    float total = 0;

    for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) {
        total += colsSizes[cols_idx];
    }

    for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) {
        colsSizes[cols_idx] = (colsSizes[cols_idx] / total) * table.getWidth();
    }

    for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) {
        logger.debug("Col: " + cols_idx + " : " + colsSizes[cols_idx]);
    }

    /*
     * if(!addedFonts.contains(table.getFont().getFont(null))) { PDFont font
     * = table.getFont().getFont(template); addedFonts.add(font);
     * innerFormResources.addFont(font); }
     *
     * if(!addedFonts.contains(table.getValueFont().getFont(null))) { PDFont
     * font = table.getValueFont().getFont(template); addedFonts.add(font);
     * innerFormResources.addFont(font); }
     */

    for (int i = 0; i < table.getRowCount(); i++) {
        ArrayList<Entry> row = table.getRow(i);
        for (int j = 0; j < row.size(); j++) {
            Entry cell = (Entry) row.get(j);
            if (cell.getType() == Entry.TYPE_IMAGE) {
                String img_value = (String) cell.getValue();
                String img_ref = createHashedId(img_value);
                if (!images.containsKey(img_ref)) {
                    BufferedImage img = ImageUtils.getImage(img_value, settings);

                    float width = colsSizes[j];
                    float height = table.getRowHeights()[i] + padding * 2;

                    float iwidth = (int) Math.floor((double) width);
                    iwidth -= 2 * padding;

                    float iheight = (int) Math.floor((double) height);
                    iheight -= 2 * padding;

                    float origWidth = (float) img.getWidth();
                    float origHeight = (float) img.getHeight();

                    if (table.style != null) {
                        if (table.style.getImageScaleToFit() != null) {
                            iwidth = table.style.getImageScaleToFit().getWidth();
                            iheight = table.style.getImageScaleToFit().getHeight();
                        }
                    }

                    float wfactor = iwidth / origWidth;
                    float hfactor = iheight / origHeight;
                    float scaleFactor = wfactor;
                    if (hfactor < wfactor) {
                        scaleFactor = hfactor;
                    }

                    iwidth = (float) Math.floor((double) (scaleFactor * origWidth));
                    iheight = (float) Math.floor((double) (scaleFactor * origHeight));

                    logger.debug("Scaling image to: " + iwidth + " x " + iheight);

                    if (this.designer.properties.getSignatureProfileSettings().isPDFA()) {
                        img = ImageUtils.removeAlphaChannel(img);
                    } else {
                        if (img.getAlphaRaster() == null && img.getColorModel().hasAlpha()) {
                            img = ImageUtils.removeAlphaChannel(img);
                        }
                    }
                    // img = ImageUtils.convertRGBAToIndexed(img);

                    PDXObjectImage pdImage = new PDPixelMap(template, img);

                    ImageObject image = new ImageObject(pdImage, iwidth, iheight);
                    images.put(img_ref, image);
                    innerFormResources.addXObject(pdImage, "Im");
                }
            } else if (cell.getType() == Entry.TYPE_TABLE) {
                PDFBoxTable tbl_value = (PDFBoxTable) cell.getValue();
                readTableResources(tbl_value, template);
            }
        }
    }
}

---

From source file:at.gv.egiz.pdfas.lib.impl.stamping.pdfbox2.PDFAsVisualSignatureBuilder.java

private void readTableResources(PDFBoxTable table, PDDocument template) throws PdfAsException, IOException {

    float[] colsSizes = table.getColsRelativeWith();
    int max_cols = table.getColCount();
    float padding = table.getPadding();
    if (colsSizes == null) {
        colsSizes = new float[max_cols];
        // set the column ratio for all columns to 1
        for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) {
            colsSizes[cols_idx] = 1;//from ww  w .  ja  v a2  s .c  o  m
        }
    }

    logger.debug("TOTAL Width: " + table.getWidth());

    float total = 0;

    for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) {
        total += colsSizes[cols_idx];
    }

    for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) {
        colsSizes[cols_idx] = (colsSizes[cols_idx] / total) * table.getWidth();
    }

    for (int cols_idx = 0; cols_idx < colsSizes.length; cols_idx++) {
        logger.debug("Col: " + cols_idx + " : " + colsSizes[cols_idx]);
    }

    /*
     * if(!addedFonts.contains(table.getFont().getFont(null))) { PDFont font
     * = table.getFont().getFont(template); addedFonts.add(font);
     * innerFormResources.addFont(font); }
     * 
     * if(!addedFonts.contains(table.getValueFont().getFont(null))) { PDFont
     * font = table.getValueFont().getFont(template); addedFonts.add(font);
     * innerFormResources.addFont(font); }
     */

    for (int i = 0; i < table.getRowCount(); i++) {
        ArrayList<Entry> row = table.getRow(i);
        for (int j = 0; j < row.size(); j++) {
            Entry cell = (Entry) row.get(j);
            if (cell.getType() == Entry.TYPE_IMAGE) {
                String img_value = (String) cell.getValue();
                String img_ref = createHashedId(img_value);
                if (!images.containsKey(img_ref)) {
                    BufferedImage img = ImageUtils.getImage(img_value, settings);

                    float width = colsSizes[j];
                    float height = table.getRowHeights()[i] + padding * 2;

                    float iwidth = (int) Math.floor((double) width);
                    iwidth -= 2 * padding;

                    float iheight = (int) Math.floor((double) height);
                    iheight -= 2 * padding;

                    float origWidth = (float) img.getWidth();
                    float origHeight = (float) img.getHeight();

                    if (table.style != null) {
                        if (table.style.getImageScaleToFit() != null) {
                            iwidth = table.style.getImageScaleToFit().getWidth();
                            iheight = table.style.getImageScaleToFit().getHeight();
                        }
                    }

                    float wfactor = iwidth / origWidth;
                    float hfactor = iheight / origHeight;
                    float scaleFactor = wfactor;
                    if (hfactor < wfactor) {
                        scaleFactor = hfactor;
                    }

                    iwidth = (float) Math.floor((double) (scaleFactor * origWidth));
                    iheight = (float) Math.floor((double) (scaleFactor * origHeight));

                    logger.debug("Scaling image to: " + iwidth + " x " + iheight);

                    if (this.designer.properties.getSignatureProfileSettings().isPDFA()) {
                        img = ImageUtils.removeAlphaChannel(img);
                    } else {
                        if (img.getAlphaRaster() == null && img.getColorModel().hasAlpha()) {
                            img = ImageUtils.removeAlphaChannel(img);
                        }
                    }
                    // img = ImageUtils.convertRGBAToIndexed(img);

                    PDImageXObject pdImage = LosslessFactory.createFromImage(template, img);

                    ImageObject image = new ImageObject(pdImage, iwidth, iheight);
                    images.put(img_ref, image);
                    innerFormResources.add(pdImage, "Im");
                }
            } else if (cell.getType() == Entry.TYPE_TABLE) {
                PDFBoxTable tbl_value = (PDFBoxTable) cell.getValue();
                readTableResources(tbl_value, template);
            }
        }
    }
}

---

From source file:org.apache.pdfbox.pdmodel.graphics.xobject.PDPixelMap.java

private void createImageStream(PDDocument doc, BufferedImage bi) throws IOException {
    BufferedImage alphaImage = null;
    BufferedImage rgbImage = null;
    int width = bi.getWidth();
    int height = bi.getHeight();
    if (bi.getColorModel().hasAlpha()) {
        // extract the alpha information
        WritableRaster alphaRaster = bi.getAlphaRaster();
        ColorModel cm = new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY), false, false,
                Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
        alphaImage = new BufferedImage(cm, alphaRaster, false, null);
        // create a RGB image without alpha
        rgbImage = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
        Graphics2D g = rgbImage.createGraphics();
        g.setComposite(AlphaComposite.Src);
        g.drawImage(bi, 0, 0, null);/* ww w .  j  a  va2s . c o m*/
    } else {
        rgbImage = bi;
    }
    java.io.OutputStream os = null;
    try {
        int numberOfComponents = rgbImage.getColorModel().getNumComponents();
        if (numberOfComponents == 3) {
            setColorSpace(PDDeviceRGB.INSTANCE);
        } else {
            if (numberOfComponents == 1) {
                setColorSpace(new PDDeviceGray());
            } else {
                throw new IllegalStateException();
            }
        }
        byte[] outData = new byte[width * height * numberOfComponents];
        rgbImage.getData().getDataElements(0, 0, width, height, outData);
        // add FlateDecode compression
        getPDStream().addCompression();
        os = getCOSStream().createUnfilteredStream();
        os.write(outData);

        COSDictionary dic = getCOSStream();
        dic.setItem(COSName.FILTER, COSName.FLATE_DECODE);
        dic.setItem(COSName.SUBTYPE, COSName.IMAGE);
        dic.setItem(COSName.TYPE, COSName.XOBJECT);
        if (alphaImage != null) {
            PDPixelMap smask = new PDPixelMap(doc, alphaImage);
            dic.setItem(COSName.SMASK, smask);
        }
        setBitsPerComponent(8);
        setHeight(height);
        setWidth(width);
    } finally {
        os.close();
    }
}

---

From source file:org.polymap.rhei.batik.engine.svg.Svg2Png.java

private static void setAlpha(BufferedImage finalThresholdImage, int x, int y, int rgb) {
    int bands = finalThresholdImage.getAlphaRaster().getSampleModel().getNumBands();
    int alpha = (rgb >> 24) & 0xFF;
    for (int b = 0; b < bands; b++) {
        finalThresholdImage.getAlphaRaster().setSample(x, y, b, alpha);
    }//from w  w w .ja v a2  s . c om
}

---

From source file:org.sejda.sambox.pdmodel.graphics.image.JPEGFactory.java

private static BufferedImage getAlphaImage(BufferedImage image) {
    if (!image.getColorModel().hasAlpha()) {
        return null;
    }//from w w  w. j  a  v a  2 s.  c  o  m
    if (image.getTransparency() == Transparency.BITMASK) {
        throw new UnsupportedOperationException(
                "BITMASK Transparency JPEG compression is not" + " useful, use LosslessImageFactory instead");
    }
    WritableRaster alphaRaster = image.getAlphaRaster();
    if (alphaRaster == null) {
        // happens sometimes (PDFBOX-2654) despite colormodel claiming to have alpha
        return null;
    }
    BufferedImage alphaImage = new BufferedImage(image.getWidth(), image.getHeight(),
            BufferedImage.TYPE_BYTE_GRAY);
    alphaImage.setData(alphaRaster);
    return alphaImage;
}

---