Is there a function that converts any image into a circle of 150x150 pixels-java?

Question

I need a function/method that can mold(crop and resize) an imported (.png format) image into a circle of exact 150x150 pixels and it should keep transparency. I have searched all over internet, also I have my own code but I think its completely useless. I need this function for a code I am using to make GUI of a social-media app database.

private ImageIcon logo = new ImageIcon(getClass().getResource("/test/test200x200.png"));
toCircle(logo);

I need the code for the following function:

public ImageIcon toCircle(ImageIcon icon)
{
    //code
    return icon;
 }

This function should convert this picture:

To this:

StackOverflow is not a code-request site. It is a question-and-answer site where you present problems that you face when programming, including all the research you have done and your best effort at the code, and we give an answer to your specific problem. Please read [ask]. — RealSkeptic, Feb 26 '17 at 10:34
I'm voting to close this question as off-topic because it is a request for code rather than a question. — RealSkeptic, Feb 26 '17 at 10:34
i am sorry i have my code but i thought it would make the question confusing — Ammar H Sufyan, Feb 26 '17 at 10:55

score 4 · Accepted Answer · edited May 23 '17 at 11:46

4

Create a new transparent image
Get a Graphics object from the image.
Set a clip for the graphics object.
Paint the PNG format image.

See also this answer that uses a clipped region.

edited May 23 '17 at 11:46

Community

1
1

answered Feb 26 '17 at 10:46

Andrew Thompson

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Hmm... the link provided links to this question Andrew :P – Frakcool Feb 26 '17 at 16:28
1

Yup the link fixed now :) 1+ – Frakcool Feb 26 '17 at 17:32

score 1 · Answer 2 · answered Feb 27 '17 at 20:31

An alternative approach, that might be more straight-forward to implement for this use case, is:

Create a transparent BufferedImage the size of your icon
Create Graphics2D from image, set hints for antialias
Fill a circle the size of your background circle
Draw the image on top of your circle, using AlphaComposite.SrcIn

Something like:

public Icon toCircle(ImageIcon logo) {
    BufferedImage image = new BufferedImage(150, 150); // Assuming logo 150x150
    Graphics2D g = image.createGraphics();
    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g.fillOval(1, 1, 148, 148); // Leaving some room for antialiasing if needed
    g.setComposite(AlphaComposite.SrcIn);
    g.drawImage(logo.getImage(), 0, 0, null);
    g.dispose();

    return new ImageIcon(image);
}

Is there a function that converts any image into a circle of 150x150 pixels-java?

2 Answers2