IIRC, the classic Deluxe Paint II (mostly for Amiga, but also PC) had this as a ...

		teddyh 11 months ago \| parent \| context \| favorite \| on: Penguin Tutorial: How Tux was created on a 486 DX2 IIRC, the classic Deluxe Paint II (mostly for Amiga, but also PC) had this as a standard feature when zooming. Classic graphics work was almost all pixel editing.