Uploaded August 2026 | Updated September 2026, 2 weeks ago
Today Peter continues looking at porting his Haskell NES emulator to Lean 4, and focuses with laser-like intensity on only one question: is there a graphics library he can use to draw on screen? The answer, unsurprisingly, involves using FFI bindings to a library written in C. So we look at how Lean 4 accesses foreign function interfaces.
Thumbnail Painting: "Rustic Life" (1888) by Akseli Gallen-Kallela
Today Peter continues looking at porting his Haskell NES emulator to Lean 4, and focuses with laser-like intensity on only one question: is there a graphics library he can use to draw on screen? The answer, unsurprisingly, involves using FFI bindings to a library written in C. So we look at how Lean 4 accesses foreign function interfaces.
Thumbnail Painting: "Rustic Life" (1888) by Akseli Gallen-Kallela
