Example usage for java.awt.image BufferedImage createGraphics

Introduction

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

Prototype

public Graphics2D createGraphics()

Source Link

Document

Creates a Graphics2D , which can be used to draw into this BufferedImage .

Usage

From source file:com.openbravo.pos.util.ThumbNailBuilder.java

public Image getThumbNailText(Image img, String text) {
    /*// ww  w.  j av a2 s.com
     * Create an image containing a thumbnail of the product image,
     * or default image.
     * 
     * Then apply the text of the product name. Use text wrapping.
     * 
     * If the product name is too big for the label, ensure that
     * the first part is displayed.
     */

    img = getThumbNail(img);

    BufferedImage imgtext = new BufferedImage(img.getWidth(null), img.getHeight(null),
            BufferedImage.TYPE_INT_ARGB);
    Graphics2D g2d = imgtext.createGraphics();

    // The text
    // <p style="width: 100px"> DOES NOT WORK PROPERLY.
    // use width= instead.
    String html = "<html><p style=\"text-align:center\" width=\"" + imgtext.getWidth() + "\">"
            + StringEscapeUtils.escapeHtml(text) + "</p>";

    JLabel label = new JLabel(html);
    label.setOpaque(false);
    //label.setText("<html><center>Line1<br>Line2");
    label.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
    label.setVerticalAlignment(javax.swing.SwingConstants.TOP);
    Dimension d = label.getPreferredSize();
    label.setBounds(0, 0, imgtext.getWidth(), d.height);

    // The background
    Color c1 = new Color(0xff, 0xff, 0xff, 0x40);
    Color c2 = new Color(0xff, 0xff, 0xff, 0xd0);

    //        Point2D center = new Point2D.Float(imgtext.getWidth() / 2, label.getHeight());
    //        float radius = imgtext.getWidth() / 3;
    //        float[] dist = {0.1f, 1.0f};
    //        Color[] colors = {c2, c1};        
    //        Paint gpaint = new RadialGradientPaint(center, radius, dist, colors);
    Paint gpaint = new GradientPaint(new Point(0, 0), c1, new Point(label.getWidth() / 2, 0), c2, true);

    g2d.drawImage(img, 0, 0, null);
    int ypos = imgtext.getHeight() - label.getHeight();
    int ypos_min = -4; // todo: configurable
    if (ypos < ypos_min)
        ypos = ypos_min; // Clamp label
    g2d.translate(0, ypos);
    g2d.setPaint(gpaint);
    g2d.fillRect(0, 0, imgtext.getWidth(), label.getHeight());
    label.paint(g2d);

    g2d.dispose();

    return imgtext;
}

From source file:com.cubusmail.server.services.RetrieveImageServlet.java

/**
 * @param bufInputStream/*from  w w w  . j a  v a  2s .c  om*/
 * @param outputStream
 */
private void writeScaledImage(BufferedInputStream bufInputStream, OutputStream outputStream) {

    long millis = System.currentTimeMillis();
    try {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        int bytesRead = 0;
        byte[] buffer = new byte[8192];
        while ((bytesRead = bufInputStream.read(buffer, 0, 8192)) != -1) {
            bos.write(buffer, 0, bytesRead);
        }
        bos.close();

        byte[] imageBytes = bos.toByteArray();

        Image image = Toolkit.getDefaultToolkit().createImage(imageBytes);
        MediaTracker mediaTracker = new MediaTracker(new Container());
        mediaTracker.addImage(image, 0);
        mediaTracker.waitForID(0);
        // determine thumbnail size from WIDTH and HEIGHT
        int thumbWidth = 300;
        int thumbHeight = 200;
        double thumbRatio = (double) thumbWidth / (double) thumbHeight;
        int imageWidth = image.getWidth(null);
        int imageHeight = image.getHeight(null);
        double imageRatio = (double) imageWidth / (double) imageHeight;
        if (thumbRatio < imageRatio) {
            thumbHeight = (int) (thumbWidth / imageRatio);
        } else {
            thumbWidth = (int) (thumbHeight * imageRatio);
        }
        // draw original image to thumbnail image object and
        // scale it to the new size on-the-fly
        BufferedImage thumbImage = new BufferedImage(thumbWidth, thumbHeight, BufferedImage.TYPE_INT_RGB);
        Graphics2D graphics2D = thumbImage.createGraphics();
        graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        graphics2D.drawImage(image, 0, 0, thumbWidth, thumbHeight, null);

        JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(outputStream);
        JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(thumbImage);
        int quality = 70;
        quality = Math.max(0, Math.min(quality, 100));
        param.setQuality((float) quality / 100.0f, false);
        encoder.setJPEGEncodeParam(param);
        encoder.encode(thumbImage);
    } catch (IOException ex) {
        log.error(ex.getMessage(), ex);
    } catch (InterruptedException ex) {
        log.error(ex.getMessage(), ex);
    } finally {
        log.debug("Time for thumbnail: " + (System.currentTimeMillis() - millis) + "ms");
    }
}

From source file:com.neophob.sematrix.generator.Textwriter.java

/**
 * create image.//from   ww w . j  av  a2  s . c  om
 *
 * @param text the text
 */
public void createTextImage(String text) {
    //only load if needed
    if (StringUtils.equals(text, this.text)) {
        return;
    }

    this.text = text;

    BufferedImage img = new BufferedImage(TEXT_BUFFER_X_SIZE, internalBufferYSize, BufferedImage.TYPE_INT_RGB);

    Graphics2D g2 = img.createGraphics();
    FontRenderContext frc = g2.getFontRenderContext();
    TextLayout layout = new TextLayout(text, font, frc);
    Rectangle2D rect = layout.getBounds();

    int h = (int) (0.5f + rect.getHeight());
    maxXPos = (int) (0.5f + rect.getWidth()) + 5;
    ypos = internalBufferYSize - (internalBufferYSize - h) / 2;

    img = new BufferedImage(maxXPos, internalBufferYSize, BufferedImage.TYPE_INT_RGB);
    g2 = img.createGraphics();

    g2.setColor(color);
    g2.setFont(font);
    g2.setClip(0, 0, maxXPos, internalBufferYSize);
    g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);

    g2.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);

    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

    g2.drawString(text, xpos, ypos);
    DataBufferInt dbi = (DataBufferInt) img.getRaster().getDataBuffer();
    textBuffer = dbi.getData();
    g2.dispose();

    wait = 0;
    xofs = 0;
    scrollRight = false;
}

From source file:org.pentaho.plugin.jfreereport.reportcharts.JFreeChartReportDrawable.java

/**
 * Returns an optional image-map for the entry.
 *
 * @param bounds the bounds for which the image map is computed.
 * @return the computed image-map or null if there is no image-map available.
 *//*from w w  w. j  a v  a2  s.co m*/
public ImageMap getImageMap(final Rectangle2D bounds) {
    if (chartRenderingInfo == null) {
        return null;
    }
    final Rectangle2D dataArea = getDataAreaOffset();
    final Rectangle2D otherArea = new Rectangle2D.Double();

    if ((ObjectUtilities.equal(bounds, this.bounds)) == false) {
        final BufferedImage image = new BufferedImage(1, 1, BufferedImage.TYPE_4BYTE_ABGR);
        final Graphics2D graphics = image.createGraphics();
        draw(graphics, bounds);
        graphics.dispose();
    }

    final ImageMap map = new ImageMap();
    final EntityCollection entityCollection = chartRenderingInfo.getEntityCollection();
    final int count = entityCollection.getEntityCount();
    for (int i = 0; i < count; i++) {
        final ChartEntity chartEntity = entityCollection.getEntity(i);
        final Shape area = chartEntity.getArea();
        final String hrefValue = chartEntity.getURLText();
        final String tooltipValue = chartEntity.getToolTipText();
        if (StringUtils.isEmpty(tooltipValue) == false || StringUtils.isEmpty(hrefValue) == false) {
            final AbstractImageMapEntry entry;
            if (chartEntity instanceof XYItemEntity || chartEntity instanceof CategoryItemEntity
                    || chartEntity instanceof PieSectionEntity) {
                entry = createMapEntry(area, dataArea);
            } else {
                entry = createMapEntry(area, otherArea);
            }
            if (entry == null) {
                continue;
            }
            if (StringUtils.isEmpty(hrefValue) == false) {
                entry.setAttribute(LibXmlInfo.XHTML_NAMESPACE, "href", hrefValue);
            } else {
                entry.setAttribute(LibXmlInfo.XHTML_NAMESPACE, "href", "#");
            }
            if (StringUtils.isEmpty(tooltipValue) == false) {
                entry.setAttribute(LibXmlInfo.XHTML_NAMESPACE, "title", tooltipValue);
            }
            map.addMapEntry(entry);
        }
    }

    return map;
}

From source file:piramide.interaction.reasoner.FuzzyReasonerWizardFacade.java

private BufferedImage createErrorMessagesImage(String text) {
    final Font font = TextTitle.DEFAULT_FONT;
    final Font bigBold = new Font(font.getName(), Font.BOLD, 24);
    final FontRenderContext frc = new FontRenderContext(null, true, false);
    final TextLayout layout = new TextLayout(text, bigBold, frc);
    final Rectangle2D bounds = layout.getBounds();
    final int w = (int) Math.ceil(bounds.getWidth());
    final int h = (int) Math.ceil(bounds.getHeight());
    final BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
    final Graphics2D g = image.createGraphics();
    g.setColor(Color.WHITE);/*from  w w  w. j a v a 2s  . c o m*/
    g.fillRect(0, 0, w, h);
    g.setColor(Color.RED);
    g.setFont(bigBold);
    g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
    g.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_OFF);
    g.drawString(text, (float) -bounds.getX(), (float) -bounds.getY());
    g.dispose();
    return image;
}

From source file:de.thm.arsnova.util.ImageUtils.java

/**
 * Rescales an image represented by a Base64-encoded {@link String}
 *
 * @param originalImageString//from  w ww . java2s .co m
 *            The original image represented by a Base64-encoded
 *            {@link String}
 * @param width
 *            the new width
 * @param height
 *            the new height
 * @return The rescaled Image as Base64-encoded {@link String}, returns null
 *         if the passed-on image isn't in a valid format (a Base64-Image).
 */
String createCover(String originalImageString, final int width, final int height) {
    if (!isBase64EncodedImage(originalImageString)) {
        return null;
    } else {
        final String[] imgInfo = extractImageInfo(originalImageString);

        // imgInfo isn't null and contains two fields, this is checked by "isBase64EncodedImage"-Method
        final String extension = imgInfo[0];
        final String base64String = imgInfo[1];

        byte[] imageData = Base64.decodeBase64(base64String);
        try (final ByteArrayInputStream bais = new ByteArrayInputStream(imageData);
                final ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
            BufferedImage originalImage = ImageIO.read(bais);
            BufferedImage newImage = new BufferedImage(width, height, originalImage.getType());
            Graphics2D g = newImage.createGraphics();

            final double ratio = ((double) originalImage.getWidth()) / ((double) originalImage.getHeight());

            int x = 0, y = 0, w = width, h = height;
            if (originalImage.getWidth() > originalImage.getHeight()) {
                final int newWidth = (int) Math.round((float) height * ratio);
                x = -(newWidth - width) >> 1;
                w = newWidth;
            } else if (originalImage.getWidth() < originalImage.getHeight()) {
                final int newHeight = (int) Math.round((float) width / ratio);
                y = -(newHeight - height) >> 1;
                h = newHeight;
            }
            g.drawImage(originalImage, x, y, w, h, null);
            g.dispose();

            StringBuilder result = new StringBuilder();
            result.append(IMAGE_PREFIX_START);
            result.append(extension);
            result.append(IMAGE_PREFIX_MIDDLE);

            ImageIO.write(newImage, extension, baos);

            baos.flush();

            result.append(Base64.encodeBase64String(baos.toByteArray()));

            return result.toString();
        } catch (IOException e) {
            logger.error(e.getLocalizedMessage());
            return null;
        }
    }
}

From source file:edu.emory.library.tast.images.ThumbnailServlet.java

protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    // location of images
    String baseUrl = AppConfig.getConfiguration().getString(AppConfig.IMAGES_URL);
    baseUrl = StringUtils.trimEnd(baseUrl, '/');

    // image name and size
    String imageFileName = request.getParameter("i");
    int thumbnailWidth = Integer.parseInt(request.getParameter("w"));
    int thumbnailHeight = Integer.parseInt(request.getParameter("h"));

    // image dir//from w w w.j ava 2 s . c  o  m
    String imagesDir = AppConfig.getConfiguration().getString(AppConfig.IMAGES_DIRECTORY);

    // create the thumbnail name
    String thumbnailFileName = FilenameUtils.getBaseName(imageFileName) + "-" + thumbnailWidth + "x"
            + thumbnailHeight + ".png";

    // does it exist?
    File thumbnailFile = new File(imagesDir, thumbnailFileName);
    if (thumbnailFile.exists()) {
        response.sendRedirect(baseUrl + "/" + thumbnailFileName);
        return;
    }

    // read the image
    File imageFile = new File(imagesDir, imageFileName);
    BufferedImage image = ImageIO.read(imageFile);
    int imageWidth = image.getWidth();
    int imageHeight = image.getHeight();
    BufferedImage imageCopy = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);
    imageCopy.getGraphics().drawImage(image, 0, 0, imageWidth, imageHeight, 0, 0, imageWidth, imageHeight,
            null);

    // height is calculated automatically
    if (thumbnailHeight == 0)
        thumbnailHeight = (int) ((double) thumbnailWidth / (double) imageWidth * (double) imageHeight);

    // width is calculated automatically
    if (thumbnailWidth == 0)
        thumbnailWidth = (int) ((double) thumbnailHeight / (double) imageHeight * (double) imageWidth);

    // create an empty thumbnail
    BufferedImage thumbnail = new BufferedImage(thumbnailWidth, thumbnailHeight, BufferedImage.TYPE_INT_RGB);
    Graphics2D gr = thumbnail.createGraphics();
    gr.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
    gr.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);

    // determine the piece of the image which we want to clip
    int clipX1, clipX2, clipY1, clipY2;
    if (imageWidth * thumbnailHeight > thumbnailWidth * imageHeight) {

        int clipWidth = (int) Math
                .round(((double) thumbnailWidth / (double) thumbnailHeight) * (double) imageHeight);
        int imgCenterX = imageWidth / 2;
        clipX1 = imgCenterX - clipWidth / 2;
        clipX2 = imgCenterX + clipWidth / 2;
        clipY1 = 0;
        clipY2 = imageHeight;
    } else {
        int clipHeight = (int) Math
                .round(((double) thumbnailHeight / (double) thumbnailWidth) * (double) imageWidth);
        int imgCenterY = imageHeight / 2;
        clipX1 = 0;
        clipX2 = imageWidth;
        clipY1 = imgCenterY - clipHeight / 2;
        clipY2 = imgCenterY + clipHeight / 2;
    }

    // we filter the image first to get better results when shrinking
    if (2 * thumbnailWidth < clipX2 - clipX1 || 2 * thumbnailHeight < clipY2 - clipY1) {

        int kernelDimX = (clipX2 - clipX1) / (thumbnailWidth);
        int kernelDimY = (clipY2 - clipY1) / (thumbnailHeight);

        if (kernelDimX % 2 == 0)
            kernelDimX++;
        if (kernelDimY % 2 == 0)
            kernelDimY++;

        if (kernelDimX < kernelDimY)
            kernelDimX = kernelDimY;
        if (kernelDimY < kernelDimX)
            kernelDimY = kernelDimX;

        float[] blurKernel = new float[kernelDimX * kernelDimY];
        for (int i = 0; i < kernelDimX; i++)
            for (int j = 0; j < kernelDimY; j++)
                blurKernel[i * kernelDimX + j] = 1.0f / (float) (kernelDimX * kernelDimY);

        BufferedImageOp op = new ConvolveOp(new Kernel(kernelDimX, kernelDimY, blurKernel));
        imageCopy = op.filter(imageCopy, null);

    }

    // draw the thumbnail
    gr.drawImage(imageCopy, 0, 0, thumbnailWidth, thumbnailHeight, clipX1, clipY1, clipX2, clipY2, null);

    // and we are done
    gr.dispose();
    ImageIO.write(thumbnail, "png", thumbnailFile);

    // redirect to it
    response.sendRedirect(baseUrl + "/" + thumbnailFileName);

}

From source file:main.MapKit.java

private BufferedImage convert(BufferedImage loadImg, Color newColor) {
    int w = loadImg.getWidth();
    int h = loadImg.getHeight();
    BufferedImage imgOut = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
    BufferedImage imgColor = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);

    Graphics2D g = imgColor.createGraphics();
    g.setColor(newColor);/*ww  w  .j av  a2 s .  c o m*/
    g.fillRect(0, 0, w + 1, h + 1);
    g.dispose();

    Graphics2D graphics = imgOut.createGraphics();
    graphics.drawImage(loadImg, 0, 0, null);
    graphics.setComposite(MultiplyComposite.Default);
    graphics.drawImage(imgColor, 0, 0, null);
    graphics.dispose();

    return imgOut;
}

From source file:at.tuwien.ifs.somtoolbox.visualization.ClusterConnectionsVisualizer.java

@Override
public BufferedImage createVisualization(int variantIndex, GrowingSOM gsom, int width, int height)
        throws SOMToolboxException {
    GrowingLayer layer = gsom.getLayer();
    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    Graphics2D g = image.createGraphics();

    g.setBackground(Color.WHITE);
    g.clearRect(0, 0, width, height);/*w w  w .  ja  v  a  2 s.  c  om*/

    // need to calculate some params relative to the unit width/height, which is relative to the desired output size
    // a unitWidth/Height of 10, as used previously, works by default only fine in the SOMViewer
    int somWidth = layer.getXSize();
    int somHeight = layer.getYSize();
    double unitWidth = width / somWidth;
    double unitHeight = height / somHeight;

    DoubleMatrix2D unitDistanceMatrix = gsom.getLayer().getUnitDistanceMatrix();

    for (int col = 0; col < somWidth; col++) {
        for (int row = 0; row < somHeight; row++) {

            if (col < somWidth - 1) {
                // draw horizontal connection
                double distanceRight = unitDistanceMatrix.get(layer.getUnitIndex(col, row),
                        layer.getUnitIndex(col + 1, row));
                g.setPaint(getColor(distanceRight));
                int xPos = (int) (col * unitHeight + unitHeight * 0.7);
                int yPos = (int) (row * unitWidth + unitWidth * 0.4);
                g.fillRect(xPos, yPos, (int) (unitWidth * 0.6), (int) (unitHeight * 0.2));
            }

            if (row < somHeight - 1) {
                // draw vertical connection
                double distanceLower = unitDistanceMatrix.get(layer.getUnitIndex(col, row),
                        layer.getUnitIndex(col, row + 1));
                g.setPaint(getColor(distanceLower));

                int xPos = (int) (col * unitHeight + unitHeight * 0.4);
                int yPos = (int) (row * unitWidth + unitWidth * 0.7);
                g.fillRect(xPos, yPos, (int) (unitWidth * 0.2), (int) (unitHeight * 0.6));
            }
        }
    }

    return image;
}

From source file:dk.dma.msinm.web.wms.WmsProxyServlet.java

/**
 * Masks out white colour// w ww.j  av  a 2s.  c  o m
 * @param image the image to mask out
 * @return the resulting image
 */
private BufferedImage transformWhiteToTransparent(BufferedImage image) {

    BufferedImage dest = image;
    if (image.getType() != BufferedImage.TYPE_INT_ARGB) {
        dest = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2 = dest.createGraphics();
        g2.drawImage(image, 0, 0, null);
        g2.dispose();

        image.flush();
    }

    // Mask out the white pixels
    final int width = image.getWidth();
    int[] imgData = new int[width];

    for (int y = 0; y < dest.getHeight(); y++) {
        // fetch a line of data from each image
        dest.getRGB(0, y, width, 1, imgData, 0, 1);
        // apply the mask
        for (int x = 0; x < width; x++) {
            for (Color col : MASKED_COLORS) {
                int colDist = Math.abs(col.getRed() - (imgData[x] >> 16 & 0x000000FF))
                        + Math.abs(col.getGreen() - (imgData[x] >> 8 & 0x000000FF))
                        + Math.abs(col.getBlue() - (imgData[x] & 0x000000FF));
                if (colDist <= COLOR_DIST) {
                    imgData[x] = 0x00FFFFFF & imgData[x];
                }
            }
        }
        // replace the data
        dest.setRGB(0, y, width, 1, imgData, 0, 1);
    }
    return dest;
}