Scaling with Push

Your game logic uses a tiny virtual resolution (e.g. 480×270). push.lua letterboxes it to any real window. This is how BTTF stays crisp fullscreen.

push = require("push")
 
local VIRTUAL_W, VIRTUAL_H = 480, 270
local WINDOW_W, WINDOW_H = 1280, 800
 
function love.load()
  push:setupScreen(VIRTUAL_W, VIRTUAL_H, WINDOW_W, WINDOW_H, {
    fullscreen = false,
    resizable = true,
    pixelperfect = true,
  })
end
 
function love.resize(w, h)
  push:resize(w, h)
end
 
function love.draw()
  push:start()
  -- draw your game in virtual coordinates here
  push:finish()
end

Rules: always draw between start()/finish(), design UI in virtual pixels, set love.graphics.setDefaultFilter("nearest", "nearest") in love.load for crisp pixels.

Full example: main.lua + push.lua in the template.

When it breaks

Symptom	Fix
Blurry pixels	setDefaultFilter("nearest","nearest") before loading images
Mouse clicks misaligned	Convert with push:toGame(x, y) — screen coords ≠ virtual coords
Black bars look wrong	Expected — that’s letterboxing preserving aspect ratio