Rotating images wit odd pixel sides length

Question

Hello, what is the best approach of solving this problem:

If you have an image whose sides are even for example 48 x 24 you may do this and you are just fine:

matrix.translate(-24, -12);
matrix.rotate(Math.PI);
matrix.translate(24, 12);

But if you have an image of size something like 49 x 25, then there is a problem with those odd pixels, how to compute when and where to add or remove those odd pixels so image gets allways perfectly rotated?

Thank you for any help!

Answer 1

Just translate by -24.5 and -12.5, etc, instead of -24 and -12.