Push and pop canvas object in Löve 2D.

useful.lua

useful.canvasStack = {}

function useful.pushCanvas(newCanvas)
  table.insert(useful.canvasStack, love.graphics.getCanvas())
  love.graphics.push()
  love.graphics.origin()
  love.graphics.setCanvas(newCanvas)
end

function useful.popCanvas()
  local n = #useful.canvasStack
  if n > 0 then
    local oldCanvas = useful.canvasStack[n]
    table.remove(useful.canvasStack, n)
    love.graphics.pop()
    love.graphics.setCanvas(oldCanvas)
  else
    love.graphics.pop()
    love.graphics.setCanvas()
  end
end