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:net.rptools.lib.image.ThumbnailManager.java

private Image createThumbnail(File file) throws IOException {
    // Gather info
    File thumbnailFile = getThumbnailFile(file);
    if (thumbnailFile.exists()) {
        return ImageUtil.getImage(thumbnailFile);
    }//  w  w  w .jav  a2 s . co  m

    Image image = ImageUtil.getImage(file);
    Dimension imgSize = new Dimension(image.getWidth(null), image.getHeight(null));

    // Test if we Should we bother making a thumbnail ?
    // Jamz: New size 100k (was 30k) and put in check so we're not creating thumbnails LARGER than the original...
    if (file.length() < 102400
            || (imgSize.width <= thumbnailSize.width && imgSize.height <= thumbnailSize.height)) {
        return image;
    }
    // Transform the image
    SwingUtil.constrainTo(imgSize, Math.min(image.getWidth(null), thumbnailSize.width),
            Math.min(image.getHeight(null), thumbnailSize.height));
    BufferedImage thumbnailImage = new BufferedImage(imgSize.width, imgSize.height,
            ImageUtil.pickBestTransparency(image));

    Graphics2D g = thumbnailImage.createGraphics();
    g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
    g.drawImage(image, 0, 0, imgSize.width, imgSize.height, null);
    g.dispose();

    // Use png to preserve transparency
    FileUtils.writeByteArrayToFile(thumbnailFile, ImageUtil.imageToBytes(thumbnailImage, "png"));

    return thumbnailImage;
}

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From source file:org.shredzone.commons.captcha.impl.DefaultCaptchaGenerator.java

@Override
public BufferedImage createCaptcha(char[] text) {
    if (text == null || text.length == 0) {
        throw new IllegalArgumentException("No captcha text given");
    }/*from w w w . j  ava2s . c o m*/

    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    Graphics2D g2d = image.createGraphics();
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2d.setBackground(Color.WHITE);
    g2d.setColor(Color.BLACK);

    clearCanvas(g2d);

    if (showGrid) {
        drawGrid(g2d);
    }

    int charMaxWidth = width / text.length;
    int xPos = 0;
    for (char ch : text) {
        drawCharacter(g2d, ch, xPos, charMaxWidth);
        xPos += charMaxWidth;
    }

    g2d.dispose();
    return image;
}

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From source file:com.t3.image.ThumbnailManager.java

private Image createThumbnail(File file) throws IOException {

    // Gather info
    File thumbnailFile = getThumbnailFile(file);
    if (thumbnailFile.exists()) {
        return ImageUtil.getImage(thumbnailFile);
    }//  w  w w.  ja v a2  s.co  m

    Image image = ImageUtil.getImage(file);

    // Should we bother making a thumbnail ?
    if (file.length() < 30 * 1024) {
        return image;
    }

    // Transform the image
    Dimension imgSize = new Dimension(image.getWidth(null), image.getHeight(null));
    SwingUtil.constrainTo(imgSize, thumbnailSize.width, thumbnailSize.height);

    BufferedImage thumbnailImage = new BufferedImage(imgSize.width, imgSize.height,
            ImageUtil.pickBestTransparency(image));

    Graphics2D g = thumbnailImage.createGraphics();
    g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
    g.drawImage(image, 0, 0, imgSize.width, imgSize.height, null);
    g.dispose();

    // Ensure path exists
    if (thumbnailFile.exists())
        thumbnailFile.delete();
    else
        thumbnailFile.getParentFile().mkdirs();

    try (OutputStream os = new FileOutputStream(thumbnailFile)) {
        IOUtils.write(ImageUtil.imageToBytes(thumbnailImage, "png"), os);
    }

    return thumbnailImage;
}

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From source file:org.n52.server.io.DiagramGenerator.java

public void createLegend(DesignOptions options, OutputStream out) throws OXFException, IOException {

    int topMargin = 10;
    int leftMargin = 30;
    int iconWidth = 15;
    int iconHeight = 15;
    int verticalSpaceBetweenEntries = 20;
    int horizontalSpaceBetweenIconAndText = 15;

    DesignDescriptionList ddList = buildUpDesignDescriptionList(options);
    int width = 800;
    int height = topMargin + (ddList.size() * (iconHeight + verticalSpaceBetweenEntries));

    BufferedImage legendImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    Graphics2D legendGraphics = legendImage.createGraphics();
    legendGraphics.setColor(Color.white);
    legendGraphics.fillRect(0, 0, width, height);

    int offset = 0;
    for (RenderingDesign dd : ddList.getAllDesigns()) {
        int yPos = topMargin + offset * iconHeight + offset * verticalSpaceBetweenEntries;

        // icon:/*from  ww w .  ja  v  a 2 s  . c  o  m*/
        legendGraphics.setColor(dd.getColor());
        legendGraphics.fillRect(leftMargin, yPos, iconWidth, iconHeight);

        // text:
        legendGraphics.setColor(Color.black);

        legendGraphics.drawString(dd.getFeature().getLabel() + " - " + dd.getLabel(),
                leftMargin + iconWidth + horizontalSpaceBetweenIconAndText, yPos + iconHeight);

        offset++;
    }

    JPEGImageWriteParam p = new JPEGImageWriteParam(null);
    p.setCompressionMode(JPEGImageWriteParam.MODE_DEFAULT);
    write(legendImage, FORMAT, out);
}

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From source file:Composite.java

public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D) g;

    Dimension d = getSize();//  w w w  . j a  v a  2  s  . c  o m
    int w = d.width;
    int h = d.height;

    // Creates the buffered image.
    BufferedImage buffImg = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
    Graphics2D gbi = buffImg.createGraphics();

    // Clears the previously drawn image.
    g2.setColor(Color.white);
    g2.fillRect(0, 0, d.width, d.height);

    int rectx = w / 4;
    int recty = h / 4;

    // Draws the rectangle and ellipse into the buffered image.
    gbi.setColor(new Color(0.0f, 0.0f, 1.0f, 1.0f));
    gbi.fill(new Rectangle2D.Double(rectx, recty, 150, 100));
    gbi.setColor(new Color(1.0f, 0.0f, 0.0f, 1.0f));
    gbi.setComposite(ac);
    gbi.fill(new Ellipse2D.Double(rectx + rectx / 2, recty + recty / 2, 150, 100));

    // Draws the buffered image.
    g2.drawImage(buffImg, null, 0, 0);
}

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From source file:org.n52.oxf.render.sos.TimeSeriesChartRenderer.java

/**
 * The resulting IVisualization shows a chart which consists a TimeSeries for each FeatureOfInterest
 * contained in the observationCollection.
 *//*from ww  w  .  j a v  a 2 s. com*/
public IVisualization renderChart(OXFFeatureCollection observationCollection, ParameterContainer paramCon,
        int width, int height) {
    JFreeChart chart = renderChart(observationCollection, paramCon);

    Plot plot = chart.getPlot();

    // draw plot into image:

    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

    Graphics2D g = image.createGraphics();

    g.setColor(Color.white);
    g.fillRect(0, 0, width, height);

    plot.draw(g, new Rectangle2D.Float(0, 0, width, height), null, null, null);

    return new StaticVisualization(image);
}

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From source file:edu.kit.dama.ui.components.TextImage.java

/**
 * Get the bytes of the final image./*w  w  w.  j  ava 2s.  c o  m*/
 *
 * @return The byte array containing the bytes of the resulting image.
 *
 * @throws IOException if creating the image fails.
 */
public byte[] getBytes() throws IOException {
    Image transparentImage = Toolkit.getDefaultToolkit().createImage(new FilteredImageSource(
            new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB).getSource(), new RGBImageFilter() {
                @Override
                public final int filterRGB(int x, int y, int rgb) {
                    return (rgb << 8) & 0xFF000000;
                }
            }));

    //create the actual image and overlay it by the transparent background
    BufferedImage outputImage = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
    Graphics2D g2d = outputImage.createGraphics();
    g2d.drawImage(transparentImage, 0, 0, null);
    //draw the remaining stuff
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
    g2d.setColor(color);
    g2d.fillRoundRect(0, 0, size, size, 20, 20);
    g2d.setColor(new Color(Math.round((float) color.getRed() * .9f), Math.round((float) color.getGreen() * .9f),
            Math.round((float) color.getBlue() * .9f)));
    g2d.drawRoundRect(0, 0, size - 1, size - 1, 20, 20);

    Font font = new Font("Dialog", Font.BOLD, size - 4);
    g2d.setFont(font);
    g2d.setColor(Color.WHITE);

    String s = text.toUpperCase().substring(0, 1);
    FontMetrics fm = g2d.getFontMetrics();
    float x = ((float) size - (float) fm.stringWidth(s)) / 2f;
    float y = ((float) fm.getAscent()
            + (float) ((float) size - ((float) fm.getAscent() + (float) fm.getDescent())) / 2f) - 1f;
    g2d.drawString(s, x, y);
    ByteArrayOutputStream bout = new ByteArrayOutputStream();
    ImageIO.write(outputImage, "png", bout);
    g2d.dispose();
    return bout.toByteArray();
}

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From source file:com.igormaznitsa.jhexed.renders.svg.SVGImage.java

public BufferedImage rasterize(final int imageType) throws IOException {
    final int svgWidth = Math.round(getSVGWidth());
    final int svgHeight = Math.round(getSVGHeight());

    final BufferedImage result = new BufferedImage(svgWidth, svgHeight, imageType);
    final Graphics2D g = result.createGraphics();

    processAntialias(this.quality, g);
    this.svgGraphicsNode.primitivePaint(g);

    g.dispose();//www.ja va  2  s  .  co  m
    return result;
}

---

From source file:Paints.java

/** Draw the example */
public void paint(Graphics g1) {
    Graphics2D g = (Graphics2D) g1;
    // Paint the entire background using a GradientPaint.
    // The background color varies diagonally from deep red to pale blue
    g.setPaint(new GradientPaint(0, 0, new Color(150, 0, 0), WIDTH, HEIGHT, new Color(200, 200, 255)));
    g.fillRect(0, 0, WIDTH, HEIGHT); // fill the background

    // Use a different GradientPaint to draw a box.
    // This one alternates between deep opaque green and transparent green.
    // Note: the 4th arg to Color() constructor specifies color opacity
    g.setPaint(new GradientPaint(0, 0, new Color(0, 150, 0), 20, 20, new Color(0, 150, 0, 0), true));
    g.setStroke(new BasicStroke(15)); // use wide lines
    g.drawRect(25, 25, WIDTH - 50, HEIGHT - 50); // draw the box

    // The glyphs of fonts can be used as Shape objects, which enables
    // us to use Java2D techniques with letters Just as we would with
    // any other shape. Here we get some letter shapes to draw.
    Font font = new Font("Serif", Font.BOLD, 10); // a basic font
    Font bigfont = // a scaled up version
            font.deriveFont(AffineTransform.getScaleInstance(30.0, 30.0));
    GlyphVector gv = bigfont.createGlyphVector(g.getFontRenderContext(), "JAV");
    Shape jshape = gv.getGlyphOutline(0); // Shape of letter J
    Shape ashape = gv.getGlyphOutline(1); // Shape of letter A
    Shape vshape = gv.getGlyphOutline(2); // Shape of letter V

    // We're going to outline the letters with a 5-pixel wide line
    g.setStroke(new BasicStroke(5.0f));

    // We're going to fake shadows for the letters using the
    // following Paint and AffineTransform objects
    Paint shadowPaint = new Color(0, 0, 0, 100); // Translucent black
    AffineTransform shadowTransform = AffineTransform.getShearInstance(-1.0, 0.0); // Shear to the right
    shadowTransform.scale(1.0, 0.5); // Scale height by 1/2

    // Move to the baseline of our first letter
    g.translate(65, 270);/* w ww.j  ava  2  s.c o  m*/

    // Draw the shadow of the J shape
    g.setPaint(shadowPaint);
    g.translate(15, 20); // Compensate for the descender of the J
    // transform the J into the shape of its shadow, and fill it
    g.fill(shadowTransform.createTransformedShape(jshape));
    g.translate(-15, -20); // Undo the translation above

    // Now fill the J shape with a solid (and opaque) color
    g.setPaint(Color.blue); // Fill with solid, opaque blue
    g.fill(jshape); // Fill the shape
    g.setPaint(Color.black); // Switch to solid black
    g.draw(jshape); // And draw the outline of the J

    // Now draw the A shadow
    g.translate(75, 0); // Move to the right
    g.setPaint(shadowPaint); // Set shadow color
    g.fill(shadowTransform.createTransformedShape(ashape)); // draw shadow

    // Draw the A shape using a solid transparent color
    g.setPaint(new Color(0, 255, 0, 125)); // Transparent green as paint
    g.fill(ashape); // Fill the shape
    g.setPaint(Color.black); // Switch to solid back
    g.draw(ashape); // Draw the outline

    // Move to the right and draw the shadow of the letter V
    g.translate(175, 0);
    g.setPaint(shadowPaint);
    g.fill(shadowTransform.createTransformedShape(vshape));

    // We're going to fill the next letter using a TexturePaint, which
    // repeatedly tiles an image. The first step is to obtain the image.
    // We could load it from an image file, but here we create it
    // ourselves by drawing a into an off-screen image. Note that we use
    // a GradientPaint to fill the off-screen image, so the fill pattern
    // combines features of both Paint classes.
    BufferedImage tile = // Create an image
            new BufferedImage(50, 50, BufferedImage.TYPE_INT_RGB);
    Graphics2D tg = tile.createGraphics(); // Get its Graphics for drawing
    tg.setColor(Color.pink);
    tg.fillRect(0, 0, 50, 50); // Fill tile background with pink
    tg.setPaint(new GradientPaint(40, 0, Color.green, // diagonal gradient
            0, 40, Color.gray)); // green to gray
    tg.fillOval(5, 5, 40, 40); // Draw a circle with this gradient

    // Use this new tile to create a TexturePaint and fill the letter V
    g.setPaint(new TexturePaint(tile, new Rectangle(0, 0, 50, 50)));
    g.fill(vshape); // Fill letter shape
    g.setPaint(Color.black); // Switch to solid black
    g.draw(vshape); // Draw outline of letter

    // Move to the right and draw the shadow of the final A
    g.translate(160, 0);
    g.setPaint(shadowPaint);
    g.fill(shadowTransform.createTransformedShape(ashape));

    g.fill(ashape); // Fill letter A
    g.setPaint(Color.black); // Revert to solid black
    g.draw(ashape); // Draw the outline of the A
}

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From source file:org.n52.server.sos.generator.DiagramGenerator.java

/**
 * Creates a time series chart diagram and writes it to the OutputStream.
 * //from   w w w  .ja  va2 s  .co  m
 * @param entireCollMap
 * @param options
 * @param out
 * @throws OXFException
 * @throws IOException
 */
public void producePresentation(Map<String, OXFFeatureCollection> entireCollMap, DesignOptions options,
        FileOutputStream out, boolean compress) throws OXFException, IOException {

    // render features:
    int width = options.getWidth();
    int height = options.getHeight();
    Calendar begin = Calendar.getInstance();
    begin.setTimeInMillis(options.getBegin());
    Calendar end = Calendar.getInstance();
    end.setTimeInMillis(options.getEnd());

    DiagramRenderer renderer = new DiagramRenderer(false);

    JFreeChart diagramChart = renderer.renderChart(entireCollMap, options, begin, end, compress);
    diagramChart.removeLegend();

    // draw chart into image:
    BufferedImage diagramImage = new BufferedImage(width, height, TYPE_INT_RGB);
    Graphics2D chartGraphics = diagramImage.createGraphics();
    chartGraphics.setColor(Color.white);
    chartGraphics.fillRect(0, 0, width, height);

    diagramChart.draw(chartGraphics, new Rectangle2D.Float(0, 0, width, height));

    JPEGEncodeParam p = new JPEGEncodeParam();
    p.setQuality(1f);
    ImageEncoder encoder = ImageCodec.createImageEncoder("jpeg", out, p);

    encoder.encode(diagramImage);
}

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