--Get Font
dofile("draw/characters")

--For each letter draw a character.
function drawText(gpu, cstring, x, y, red, green, blue, alpha)
  for pos=1,string.len(cstring),1 do
    drawChar(gpu, string.sub(string.lower(cstring), pos, pos), x + ((pos - 1) * 4), y, red, green, blue, alpha)
  end
end
--Draw a single character.
function drawChar(gpu, character, x, y, red, green, blue, alpha)
  gpured, gpublue, gpugreen, gpualpha = gpu.getColor()
  red = red or gpured
  blue = blue or gpublue
  green = green or gpugreen
  alpha = alpha or gpualpha
  if (type(alpha) == "nil") then
    alpha = 255
  end
  gpu.setColor(red, green, blue, alpha)
  for ix=1,h,1 do
    for iy=1,v,1 do
      if (type(characters[character]) == "table") then
        if(characters[character][iy][ix] == true) then
          gpu.plot(ix+x,iy+y)
        end
      else
        if(characters["?"][iy][ix] == true) then
          gpu.setColor(255, 0, 0, 255)
          gpu.plot(ix+x,iy+y)
        else
          gpu.setColor(0, 0, 0, 255)
          gpu.plot(ix+x,iy+y)
        end
        gpu.setColor(red, green, blue, alpha)
      end
    end
  end
end