Reverse Integer Values

Question

I have a scenario which I think I can convey giving PC Monitor example (not real though).

Assume I have two monitors both of different resolution and properties. One monitor draws mouse cursor on screen from top (0) to bottom (max-value) and other draws mouse from bottom (0) to top (max-value). In other words both have reverse y-axis of each other in drawing mouse cursor and I need to write a formula that will convert one monitor cursor position to another and vice versa given one monitor x and y cursor positions.

What formula is the best suited for this?

Answer 1

right_x = (1 - left_x / left_width) * right_width
right_y = (1 - left_y / left_height) * right_height

The left_x and left_y (as well as the resolutions for each display) would need to be known.