What happens in memory if my image size is 15 X 15 pixels?

What happens if my image size is 15 X 15 pixels?

will it:

  1. stretch in memory to the next largest power of 2? e.i. 16 x 16?

or

  1. it will go to the max in memory, e.i. 1024 X 1024

It will stretch in memory to the next largest power of 2.

Thank-you Minggo Zhang.