erdos/src/draw/picture.lua

return function(draw)

function draw:img(im, x, y, r, sx, sy)
  love.graphics.draw(im, x, y, r, sx, sy)
  return self
end

function draw:cr(cr, x, y, r, sx, sy)
  if cr.fr then return end
  return self:img(cr._cr, x, y, r, sx, sy)
end

end