get("#388") -- rect functions
get("#348") -- rgb functions
get("#430") -- makeIcon
get("#452") -- findGrid
get("#454") -- Java character reference
get("#433") -- iconDiff

function trimTable(tbl)
  for i = 1, #tbl do
    tbl[i] = tbl[i]:gsub(" +$", "")
  end
  while #tbl > 0 and tbl[#tbl] == "" do
    tbl[#tbl] = nil
  end
end

function recognizeChar(icon)
  local best, min
  for _, ic in ipairs(characterReference) do
    local c, reficon = unpack(ic)
    local diff
    if min ~= nil then
      diff = iconDiffWithLimit(icon, reficon, min, fw, fh)
    else
      diff = iconDiff(icon, reficon)
    end
    --print("c", c, "diff", diff, "reficon", reficon)
    if diff ~= nil and (min == nil or diff < min) then
      best, min = c, diff
    end
  end
  return best, min
end

findGrid()

tbl = {}
for yy = sy, h-fh, fh do
  line = {}
  for xx = sx, w-fw, fw do
    cropped = {width=fw, height=fh,
      getInt = function(x, y) return img.getInt(xx+x, yy+y) end}
    local icon = makeIcon(cropped)
    local c, diff = recognizeChar(icon)
    if maxdiff == nil or diff > maxdiff then
      maxdiff, maxc = diff, c
    end
    --print("c: "..tostring(c)..", diff: "..tostring(diff)..", icon: "..icon)
    table.insert(line, c or "?")
  end
  table.insert(tbl, table.concat(line))
end

trimTable(tbl)

print("maxdiff", maxdiff, "c", maxc)

return "Screen text:\n"..table.concat(tbl, "\n")