> new_image(x,y) = old_image(y, old_height - x) If you implement this as a view (rather than imperatively), you can get the compiler to optimize out four succe

> new_image(x,y) = old_image(y, old_height - x) If you implement this as a view (rather than imperatively), you can get the compiler to optimize out four successive rotations to nothing :) https://blog.cy.md/2014/03/21/functional-image-processing-in-d/ https://blog.cy.md/2014/03/21/functional-image-processing-in...