LÖVE rescale

camera.lua

function Camera:resize(w, h)
  local dw, dh = config.graphics.width, config.graphics.height
  local x, y = w / dw, h / dh
  local scale = math.min(x, y)
  local width, height = dw * scale, dh * scale
  self.camera:setScale(scale)
  local wPadding, hPadding = (w - width) / 2, (h - height) / 2
  self.padding = {
    x = wPadding, y = hPadding
  }
  self.camera:setWindow(wPadding, hPadding, width, height)
  Signal.emit('cameraResize')
end