Metal API masters, is there a trick to flip the viewport other than flipping the y-axis of the projection matrix? I started out with GL conventions and Vulkan supports flipping the viewport rectangle so I just ignored the issue until now. Doing it CPU side would be messy, but maybe I can do some macro magic shader side with spirv-cross...
Solution: I'm using spirv-cross, and it has a --flip-vert-y flag. I totally missed that because I was only looking in the Metal specific section, whoops.
