Example usage for java.awt.image BufferedImage getGraphics

Introduction

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

Prototype

public java.awt.Graphics getGraphics() 

Source Link

Document

This method returns a Graphics2D , but is here for backwards compatibility.

Usage

From source file:Main.java

public static BufferedImage createRotatedTextImage(String text, int angle, Font ft) {
    Graphics2D g2d = null;//ww  w  . j  a  va  2s . c o  m
    try {
        if (text == null || text.trim().length() == 0) {
            return null;
        }

        BufferedImage stringImage = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);

        g2d = (Graphics2D) stringImage.getGraphics();
        g2d.setFont(ft);

        FontMetrics fm = g2d.getFontMetrics();
        Rectangle2D bounds = fm.getStringBounds(text, g2d);

        TextLayout tl = new TextLayout(text, ft, g2d.getFontRenderContext());

        g2d.dispose();
        g2d = null;

        return createRotatedImage(tl, (int) bounds.getWidth(), (int) bounds.getHeight(), angle);
    } catch (Exception e) {
        e.printStackTrace();

        if (g2d != null) {
            g2d.dispose();
        }
    }

    return null;
}

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From source file:com.smash.revolance.ui.model.helper.ImageHelper.java

public static BufferedImage scaleImage(BufferedImage image, double widthPerCent, double heightPerCent) {
    int w = (int) (image.getWidth() * widthPerCent);
    int h = (int) (image.getHeight() * heightPerCent);
    int t = image.getType();

    Image scaledImage = image.getScaledInstance(w, h, Image.SCALE_SMOOTH);

    BufferedImage newImg = new BufferedImage(w, h, t);
    newImg.getGraphics().drawImage(scaledImage, 0, 0, null);

    return newImg;
}

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From source file:ImageUtils.java

/**
 * Scales down an image into a box of maxSideLenght x maxSideLength.
 * @param image the image to scale down. It remains untouched.
 * @param maxSideLength the maximum side length of the scaled down instance. Has to be > 0.
 * @return the scaled image, the//from  ww w.ja v a  2s.  com
 */
public static BufferedImage scaleImage(BufferedImage image, int maxSideLength) {
    assert (maxSideLength > 0);
    double originalWidth = image.getWidth();
    double originalHeight = image.getHeight();
    double scaleFactor = 0.0;
    if (originalWidth > originalHeight) {
        scaleFactor = ((double) maxSideLength / originalWidth);
    } else {
        scaleFactor = ((double) maxSideLength / originalHeight);
    }
    // create smaller image
    BufferedImage img = new BufferedImage((int) (originalWidth * scaleFactor),
            (int) (originalHeight * scaleFactor), BufferedImage.TYPE_INT_RGB);
    // fast scale (Java 1.4 & 1.5)
    Graphics g = img.getGraphics();
    g.drawImage(image, 0, 0, img.getWidth(), img.getHeight(), null);
    return img;
}

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From source file:QRCode.java

public static String createQRCode(String arg) {
    int size = 125;
    String fileType = "png";
    File myFile = null;/*  w w  w.java2 s  .c o m*/
    UUID uuid = UUID.nameUUIDFromBytes(arg.getBytes());

    try {
        myFile = File.createTempFile("temp-file-name", ".png");

        Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
        hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        BitMatrix byteMatrix = qrCodeWriter.encode(uuid.toString(), BarcodeFormat.QR_CODE, size, size, hintMap);
        int CrunchifyWidth = byteMatrix.getWidth();
        BufferedImage image = new BufferedImage(CrunchifyWidth, CrunchifyWidth, BufferedImage.TYPE_INT_RGB);
        image.createGraphics();

        Graphics2D graphics = (Graphics2D) image.getGraphics();
        graphics.setColor(Color.WHITE);
        graphics.fillRect(0, 0, CrunchifyWidth, CrunchifyWidth);
        graphics.setColor(Color.BLACK);

        for (int i = 0; i < CrunchifyWidth; i++) {
            for (int j = 0; j < CrunchifyWidth; j++) {
                if (byteMatrix.get(i, j)) {
                    graphics.fillRect(i, j, 1, 1);
                }
            }
        }
        ImageIO.write(image, fileType, myFile);
        //System.out.println("\n\nYou have successfully created QR Code " + myFile.getCanonicalPath());
        return myFile.getCanonicalPath();
    } catch (WriterException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return null;
}

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From source file:davmail.util.IOUtil.java

/**
 * Resize image to a max width or height image size.
 *
 * @param inputImage input image//w w w. j  a  v a  2 s . c  o m
 * @param max        max size
 * @return scaled image
 */
public static BufferedImage resizeImage(BufferedImage inputImage, int max) {
    int width = inputImage.getWidth();
    int height = inputImage.getHeight();
    int targetWidth;
    int targetHeight;
    if (width <= max && height <= max) {
        return inputImage;
    } else if (width > height) {
        targetWidth = max;
        targetHeight = targetWidth * height / width;
    } else {
        targetHeight = max;
        targetWidth = targetHeight * width / height;
    }
    Image scaledImage = inputImage.getScaledInstance(targetWidth, targetHeight, Image.SCALE_SMOOTH);
    BufferedImage targetImage = new BufferedImage(targetWidth, targetHeight, BufferedImage.TYPE_INT_RGB);
    targetImage.getGraphics().drawImage(scaledImage, 0, 0, null);
    return targetImage;
}

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From source file:SWTUtils.java

/**
 * Converts an AWT image to SWT.//from   w  ww.j  a va  2s.  com
 *
 * @param image  the image (<code>null</code> not permitted).
 *
 * @return Image data.
 */
public static ImageData convertAWTImageToSWT(Image image) {
    if (image == null) {
        throw new IllegalArgumentException("Null 'image' argument.");
    }
    int w = image.getWidth(null);
    int h = image.getHeight(null);
    if (w == -1 || h == -1) {
        return null;
    }
    BufferedImage bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
    Graphics g = bi.getGraphics();
    g.drawImage(image, 0, 0, null);
    g.dispose();
    return convertToSWT(bi);
}

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From source file:Utils.java

/** 
 * Renders a paragraph of text (line breaks ignored) to an image (created and returned). 
 *
 * @param font The font to use//from   w  w  w.j  a va 2 s .  com
 * @param textColor The color of the text
 * @param text The message
 * @param width The width the text should be limited to
 * @return An image with the text rendered into it
 */
public static BufferedImage renderTextToImage(Font font, Color textColor, String text, int width) {
    Hashtable map = new Hashtable();
    map.put(TextAttribute.FONT, font);
    AttributedString attributedString = new AttributedString(text, map);
    AttributedCharacterIterator paragraph = attributedString.getIterator();

    FontRenderContext frc = new FontRenderContext(null, false, false);
    int paragraphStart = paragraph.getBeginIndex();
    int paragraphEnd = paragraph.getEndIndex();
    LineBreakMeasurer lineMeasurer = new LineBreakMeasurer(paragraph, frc);

    float drawPosY = 0;

    //First time around, just determine the height
    while (lineMeasurer.getPosition() < paragraphEnd) {
        TextLayout layout = lineMeasurer.nextLayout(width);

        // Move it down
        drawPosY += layout.getAscent() + layout.getDescent() + layout.getLeading();
    }

    BufferedImage image = createCompatibleImage(width, (int) drawPosY);
    Graphics2D graphics = (Graphics2D) image.getGraphics();
    graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);

    drawPosY = 0;
    lineMeasurer.setPosition(paragraphStart);
    while (lineMeasurer.getPosition() < paragraphEnd) {
        TextLayout layout = lineMeasurer.nextLayout(width);

        // Move y-coordinate by the ascent of the layout.
        drawPosY += layout.getAscent();

        /* Compute pen x position.  If the paragraph is
           right-to-left, we want to align the TextLayouts
           to the right edge of the panel.
         */
        float drawPosX;
        if (layout.isLeftToRight()) {
            drawPosX = 0;
        } else {
            drawPosX = width - layout.getAdvance();
        }

        // Draw the TextLayout at (drawPosX, drawPosY).
        layout.draw(graphics, drawPosX, drawPosY);

        // Move y-coordinate in preparation for next layout.
        drawPosY += layout.getDescent() + layout.getLeading();
    }

    graphics.dispose();
    return image;
}

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From source file:net.sqs2.omr.session.logic.PageImageRenderer.java

private static void copyImage(BufferedImage src, BufferedImage image) {
    Graphics2D g = (Graphics2D) image.getGraphics();
    int w = image.getWidth();
    int h = image.getHeight();
    g.drawImage(src, 0, 0, w, h, null);/*w  w  w  .j  av  a 2s  .  c  o  m*/
    src.flush();
}

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From source file:ImageUtilities.java

private static BufferedImage convertToARGB(BufferedImage srcImage) {
    BufferedImage newImage = new BufferedImage(srcImage.getWidth(null), srcImage.getHeight(null),
            BufferedImage.TYPE_INT_ARGB);
    Graphics bg = newImage.getGraphics();
    bg.drawImage(srcImage, 0, 0, null);/*from   ww w  . j a  v a 2  s  .  c  o  m*/
    bg.dispose();
    return newImage;
}

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From source file:ddf.metrics.reporting.internal.rrd4j.RrdDumper.java

public static void displayGraph(String metricName, String rrdFilename, long startTime, long endTime,
        String verticalAxisLabel, String title) throws IOException, MetricsGraphException {
    // Create RRD DB in read-only mode for the specified RRD file
    RrdDb rrdDb = new RrdDb(rrdFilename, true);

    // Extract the data source (should always only be one data source per RRD file - otherwise
    // we have a problem)
    if (rrdDb.getDsCount() != 1) {
        throw new MetricsGraphException("Only one data source per RRD file is supported - RRD file "
                + rrdFilename + " has " + rrdDb.getDsCount() + " data sources.");
    }/*from  w w w  .j  ava2  s. c o  m*/

    // Define attributes of the graph to be created for this metric
    RrdGraphDef graphDef = new RrdGraphDef();
    graphDef.setTimeSpan(startTime, endTime);
    graphDef.setImageFormat("PNG");
    graphDef.setShowSignature(false);
    graphDef.setStep(60);
    graphDef.setVerticalLabel(verticalAxisLabel);
    graphDef.setHeight(500);
    graphDef.setWidth(1000);
    graphDef.setTitle(title);

    DsType dataSourceType = rrdDb.getDatasource(0).getType();

    // Determine if the Data Source for this RRD file is a COUNTER or GAUGE
    // (Need to know this because COUNTER data is averaged across samples and the vertical axis
    // of the
    // generated graph by default will show data per rrdStep interval)
    if (dataSourceType == DsType.DERIVE) {
        long rrdStep = rrdDb.getRrdDef().getStep();

        // Multiplied by the rrdStep to "undo" the automatic averaging that RRD does
        // when it collects TOTAL data - we want the actual totals for the step, not
        // the average of the totals.
        graphDef.datasource("myTotal", rrdFilename, "data", ConsolFun.TOTAL);
        graphDef.datasource("realTotal", "myTotal," + rrdStep + ",*");
        graphDef.datasource("validTotal", "realTotal," + METRICS_MAX_THRESHOLD + ",GT,UNKN,realTotal,IF");
        graphDef.line("validTotal", Color.BLUE, convertCamelCase(metricName), 2);

        // Add some spacing between the graph and the summary stats shown beneath the graph
        graphDef.comment("\\s");
        graphDef.comment("\\s");
        graphDef.comment("\\c");

        // Average, Min, and Max over all of the TOTAL data - displayed at bottom of the graph
        graphDef.gprint("validTotal", ConsolFun.AVERAGE, "Average = %.3f%s");
        graphDef.gprint("validTotal", ConsolFun.MIN, "Min = %.3f%s");
        graphDef.gprint("validTotal", ConsolFun.MAX, "Max = %.3f%s");
    } else if (dataSourceType == DsType.GAUGE) {
        graphDef.datasource("myAverage", rrdFilename, "data", ConsolFun.AVERAGE);
        graphDef.line("myAverage", Color.RED, convertCamelCase(metricName), 2);

        // Add some spacing between the graph and the summary stats shown beneath the graph
        graphDef.comment("\\s");
        graphDef.comment("\\s");
        graphDef.comment("\\c");

        // Average, Min, and Max over all of the AVERAGE data - displayed at bottom of the graph
        graphDef.gprint("myAverage", ConsolFun.AVERAGE, "Average = %.3f%s");
        graphDef.gprint("myAverage", ConsolFun.MIN, "Min = %.3f%s");
        graphDef.gprint("myAverage", ConsolFun.MAX, "Max = %.3f%s");
    } else {
        rrdDb.close();
        throw new MetricsGraphException("Unsupported data source type " + dataSourceType.name()
                + " in RRD file " + rrdFilename + ", only COUNTER and GAUGE data source types supported.");
    }

    rrdDb.close();

    // Use "-" as filename so that RRD creates the graph only in memory (no file is
    // created, hence no file locking problems due to race conditions between multiple clients)
    graphDef.setFilename("graph.gif");
    RrdGraph graph = new RrdGraph(graphDef);
    BufferedImage bi = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);
    graph.render(bi.getGraphics());
}

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