scale origin.lua

local lg = love.graphics
local canvas = lg.newCanvas(128,128) -- treat canvas as your sprite, but I was too lazy to draw a debug image, so I made one from a canvas
lg.setCanvas(canvas) -- French flag debug graphic
lg.clear(1,1,1)
lg.setColor(0.2,0.2,0.8)
lg.rectangle("fill", 0, 0, 43,128)
lg.setColor(0.8,0.2,0.2)
lg.rectangle("fill",88,0, 43,128)
lg.setColor(1,1,1)
lg.setCanvas()

local time = 0
local dir = 1
function love.update(dt)
	time = time + dt * dir
	if dir == 1 and time > 1 then
		dir = -1
		time = 1
	elseif dir == -1 and time < -1 then
		dir = 1
		time = -1
	end
end

local halfwidth = canvas:getWidth()/2
function love.draw()
	lg.push()
	lg.translate(200+halfwidth,200)	
	lg.scale(time, 1) -- ensure there's a 1 or it'll scale on both axis
	lg.translate(   -halfwidth,  0)
	lg.draw(canvas)
	lg.pop()
end