Libgdx crop image to circle - libgdx

Question

I'm looking for a way to crop a photo taken from the users gallery to a circle, to be displayed as a profile picture basically.
I've been recommended to use Masking .
But I can't work out how to actually do it. There are virtually no examples of it, except with android code. But since I'm going to port my game to IOS as well I need a Libgdx solution.
So has anyone done this before and have an working example perhaps?
Here's how I'll fetch the image:
ublic void invokeGallery() {
if (utils != null) {
loading = true;
utils.pickImage(new utilsInterface.Callback() {
#Override
public ImageHandler onImagePicked(final InputStream stream) {
loading = true;
final byte[] data;
try {
data = StreamUtils.copyStreamToByteArray(stream);
Gdx.app.postRunnable(new Runnable() {
#Override
public void run() {
loading = false;
}
});
} catch (IOException e) {
e.printStackTrace();
}
loading = false;
return null;
}
});
}
}

Answer 1

I use this, it works, but there is no interpolation, which means the edges are pixelated. You can chose to either implement interpolation or use a border!
public static Pixmap roundPixmap(Pixmap pixmap)
{
int width = pixmap.getWidth();
int height = pixmap.getHeight();
Pixmap round = new Pixmap(pixmap.getWidth(),pixmap.getHeight(),Pixmap.Format.RGBA8888);
if(width != height)
{
Gdx.app.log("error", "Cannot create round image if width != height");
round.dispose();
return pixmap;
}
double radius = width/2.0;
for(int y=0;y<height;y++)
{
for(int x=0;x<width;x++)
{
//check if pixel is outside circle. Set pixel to transparant;
double dist_x = (radius - x);
double dist_y = radius - y;
double dist = Math.sqrt((dist_x*dist_x) + (dist_y*dist_y));
if(dist < radius)
{
round.drawPixel(x, y,pixmap.getPixel(x, y));
}
else
round.drawPixel(x, y, 0);
}
}
Gdx.app.log("info", "pixmal rounded!");
return round;
}
Do keep in mind this will all be unmanaged! To make life easier I usually save the image and load it as a managed texture.