These packages are copied from Dmitri Shuralyov's mtl packages and edited with Dmitri's permission: * `github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/ca` (copied from `dmitri.shuralyov.com/gpu/mtl/example/movingtriangle/internal/ca`) * `github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/mtl` (copied from `dmitri.shuralyov.com/gpu/mtl`) * `github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/ns` (copied from `dmitri.shuralyov.com/gpu/mtl/example/movingtriangle/internal/ns`)