Retrieve new width and height of BufferedImage bounds after a AffineTransform.rotate()

Question

I'm working on a type of image editor which includes snapping to other elements as a feature. The snapping works by using the image width and height.

However, after an AffineTransform.rotate() the image width and height are no longer the actual bounds of the rendered image and thus the snapping fails.

What's the best way of determining the width and height of the rectangular area that encompasses the rotated image?

Answer 1

For int:

affineTransform.createTransformedShape(new Rectangle(width, height))
        .getBounds();

For double:

affineTransform.createTransformedShape(
        new Rectangle2D.Double(width, height)).getBounds2D();