Fill rectangle with pattern in Java Swing

Question

I know how to fill a rectangle in Swing with a solid color:

Graphics2D g2d = bi.createGraphics();
g2d.setColor(Color.RED);
g2d.fillRect(0,0,100,100);

I know how to fill it with an image:

BufferedImage bi;
Graphics2D g2d = bi.createGraphics();
g2d.setPaint (new Color(r, g, b));
g2d.fillRect (0, 0, bi.getWidth(), bi.getHeight());

But how to fill rectangle of size 950x950 with some tiled pattern of size 100x100?

(pattern image should be used 100 times)

put every elements to the array (in proper ordering), then loop inside array — mKorbel, Mar 10 '13 at 20:32
for better help sooner post an [SSCCE](http://sscce.org/), short, runnable, compilable — mKorbel, Mar 10 '13 at 20:33
Have you tried using a [TexturePaint](http://docs.oracle.com/javase/7/docs/api/java/awt/TexturePaint.html) object for this? — Hovercraft Full Of Eels, Mar 10 '13 at 20:33
@HovercraftFullOfEels No, I haven't known about it, thank you! — Edward Ruchevits, Mar 10 '13 at 20:36

score 13 · Accepted Answer · edited Jan 20 '17 at 13:58

13

You're on the right track with setPaint. However, instead of setting it to a color, you want to set it to a TexturePaint object.

From the Java tutorial:

The pattern for a TexturePaint class is defined by a BufferedImage class. To create a TexturePaint object, you specify the image that contains the pattern and a rectangle that is used to replicate and anchor the pattern. The following image represents this feature:

If you have a BufferedImage for the texture, create a TexturePaint like so:

TexturePaint tp = new TexturePaint(myImage, new Rectangle(0, 0, 16, 16));

where the given rectangle represents the area of the source image you want to tile.

The constructor JavaDoc is here.

Then, run

g2d.setPaint(tp);

and you're good to go.

edited Jan 20 '17 at 13:58

Tilman Hausherr

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answered Mar 10 '13 at 20:37

wchargin

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is it possible to randomize the positions a little bit? – wutzebaer Feb 15 '15 at 13:39
@wutzebaer Not with a texture paint, no. There isn't a concept of "positions" (of, presumably, the circles); the circles are just part of the image, which gets tiled. If you actually want this specific pattern but with randomized circles, you could draw it procedurally: first fill your canvas with the background color, then fill rows of circles, and perturb them slightly from the nominal positions. – wchargin Feb 15 '15 at 15:52

IvanRF · Answer 2 · 2017-02-17T15:30:27.417

As @wchargin said, you can use TexturePaint. Here is an example:

public class TexturePanel extends JPanel {

    private TexturePaint paint;

    public TexturePanel(BufferedImage bi) {
        super();
        this.paint = new TexturePaint(bi, new Rectangle(0, 0, bi.getWidth(), bi.getHeight()));
    }

    @Override
    protected void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;
        g2.setPaint(paint);
        g2.fill(new Rectangle(0, 0, getWidth(), getHeight()));
    }
}

Fill rectangle with pattern in Java Swing

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