Question

I would like to generate text image same as the JLabel label without displaying JLabel.

I tried same Font, same drawing method.
But generated image is not same as JLabel.

My sourcecode is below.
* ‘super.paintComponent(g)’ has been commented out for clarity that it is the same way. Output image is same.
* Below drawing by ‘View.paint’ method, but I’m tried ‘SwingUtilities2.drawString’ too. Two results are the same.

    /* Label */
    JLabel label = new JLabel(text) {
        @Override
        public void paintComponent(Graphics g) {
            //super.paintComponent(g);
            View v = BasicHTML.createHTMLView(this, getText());
            v.paint(g, new Rectangle(0, 0, getWidth(), getFontMetrics(
                            getFont()).getAscent()));
        }
    };
    label.setFont(new Font("Consolas", Font.PLAIN, 13));

    /* Image */
    FontMetrics fm = label.getFontMetrics(font);
    BufferedImage image = new BufferedImage(fm.stringWidth(text),
                fm.getHeight(), BufferedImage.TYPE_INT_RGB);
    Graphics2D g2d = image.createGraphics();
    g2d.setFont(label.getFont());

    // Clear background.
    g2d.setPaint(label.getBackground());
    g2d.fillRect(0, 0, image.getWidth(), image.getHeight());

    // Draw string.
    g2d.setClip(new Rectangle(0, 0, image.getWidth(), image.getHeight()));
    View v = BasicHTML.createHTMLView(label, text);
    v.paint(g2d, new Rectangle(0, 0, image.getWidth(), 
            g2d.getFontMetrics().getAscent()));

    // ... output image to file ...

Result image is following.
[JLabel]

[Generated image]

Generated image is slightly thin-faced, as compared to JLabel’s capture.
How can I generate text image same as the JLabel label?

Thank you for your consideration.

Answer 1

I’m not sure, but you might need to create a compatible buffered image (compatible to the display)

GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gs = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gs.getDefaultConfiguration();

// Create an image that does not support transparency
BufferedImage bimage = gc.createCompatibleImage(100, 100, Transparency.OPAQUE);

This will at least get you on a close with the graphics been used to render to the screen

You might also like to pay around with the rendering quality as well

Kleopatra did a post on a similar question awhile ago, you might to try and hunt it down