Löve 2D canvas scaling

scaling_canvas.lua

function love.draw()
  local width, height = love.graphics.getDimensions()
	local gameScale = canvasWidth / canvasHeight
	local windowScale = width / height
	local sw, sh = width/canvasWidth, height/canvasHeight

	if windowScale > gameScale then
		drawScale = sh
	else
		drawScale = sw
	end

	local hSpace = width - (canvasWidth * drawScale)
	local vSpace = height - (canvasHeight * drawScale)

	local drawOffsetHorizontal = hSpace / 2
	local drawOffsetVertical = vSpace / 2





	love.graphics.setCanvas(gameCanvas)
	love.graphics.clear(0,0,0,1)

	
	
	for _,particle in ipairs(particle_collection) do
		particle:draw()
	end

	-- try to draw player
	player:draw()
	draw_enemies()

  love.graphics.setCanvas()
	love.graphics.draw(gameCanvas, drawOffsetHorizontal, drawOffsetVertical, 0, drawScale, drawScale)
 end