completely rewrote gpu, still broken but getting better, i hope?

include/luares.h

@@ -13,7 +13,6 @@ extern char lua_init[];
 extern char lua_internet[];
 extern char lua_sandbox[];
 extern char lua_textgpu[];
-extern char lua_textgpu_new[];
 extern char lua_textgpu_old[];
 extern char lua_util_buffer[];
 extern char lua_util_color[];

src/lua/core/textgpu.lua

@@ -1,262 +1,283 @@
 local textgpu = {}
 
 local mapping = {}
+local palette = {}
 
--- generate the mapping
+-- generate color mapping
 
-local i = 0
 for g=0, 255, 0x24 do
-  for b=0, 255, 0x40 do
+  for b=0, 256, 0x40 do
     for r=0, 255, 0x33 do
-      mapping[tostring(i)] = (r * 0x10000) + (g * 0x100) + b
+      mapping[#mapping+1] = (math.min(r, 255) * 0x10000)
-      i = i + 1
+                          + (math.min(g, 255) * 0x100) + math.min(b, 255)
     end
   end
 end
 
---[[local nw = io.write
+for i=0, 15, 1 do
-io.write = function(...)
+  mapping[#mapping+1] = (i+1) * 0x0f0f0f
-  nw(...)
+  palette[i] = (i+1) * 0x0f0f0f
-  io.flush()
+end
-  native.sleep(20000)
-end]]--
 
 local write = io.write
 local flush = io.flush
 
-local background = "\0"
+local background = 1
-local foreground = "\255"
+local foreground = 256
 
 local tbuffer = {}
 local bbuffer = {}
 local fbuffer = {}
 
-local function prepareBuffers(w, h)
+local function prep(w, h)
-  local tbline = (" "):rep(w)
+  local tl = string.rep(" ", w)
-  local bbline = ("\0"):rep(w)
+  local bb = string.rep("\0", w)
-  local fbline = ("\7"):rep(w)
+  local fb = string.rep("\255", w)
-  for i=1, h do
+
-    tbuffer[i] = tbline
+  for i=1, h, 1 do
-    bbuffer[i] = bbline
+    tbuffer[i] = tl
-    fbuffer[i] = fbline
+    bbuffer[i] = bb
+    fbuffer[i] = fb
   end
 end
 
-local usub
+local fg = 256
-local function insertString(main, sub, at)
+local bg = 1
-  checkArg(1, main, "string")
+local w, h = 1, 1
-  checkArg(2, sub, "string")
-  checkArg(3, at, "number")
 
-  return usub(main, 1, at - 1)
+local unsub
-    .. sub .. usub(main, at + (utf8.len(sub) or 0))
+local function set(x, y, text, f, b)
+  if x > w or x < 1 or y > h or y < 1 or not tbuffer[y] then
+    error("index out of bounds: " .. y, 3)
+  end
+  f = f or fg
+  b = b or bg
+  local len = utf8.len(text)
+  if x + len > w then
+    text = unsub(text, 1, -1 - ((x + len) - w))
+  end
+  tbuffer[y] = tbuffer[y]:sub(1, x - 1) ..
+    text .. tbuffer[y]:sub(x + len)
+  if type(f) == "string" then
+    fbuffer[y] = fbuffer[y]:sub(1, x - 1) ..
+      f .. fbuffer[y]:sub(x + len)
+  else
+    fbuffer[y] = fbuffer[y]:sub(1, x - 1) ..
+     string.rep(string.char(f - 1), len) .. fbuffer[y]:sub(x + len)
+  end
+  if type(b) == "string" then
+    bbuffer[y] = bbuffer[y]:sub(1, x - 1) ..
+      b .. bbuffer[y]:sub(x + len)
+  else
+    bbuffer[y] = fbuffer[y]:sub(1, x - 1) ..
+      string.rep(string.char(b - 1), len) .. bbuffer[y]:sub(x + len)
+  end
+  local F, B = mapping[f], mapping[b]
+  write("\27[38;2;", F&0xFF0000, ";", F&0x00FF00, ";", F&0x0000FF, "m")
+  write("\27[48;2;", B&0xFF0000, ";", B&0x00FF00, ";", B&0x0000FF, "m")
+  write("\27[", x, ";", y, "H", text)
+end
+
+local function fullRefresh()
+  for i=1, h, 1 do
+    local text = tbuffer[i]
+    local fgt = fbuffer[i]
+    local bgt = bbuffer[i]
+    local pb, pf
+    fgt = fgt:gsub("()(.)", function(n, fc)
+      local bc, tc = bgt:sub(n,n), text:sub(n,n)
+      local str = ""
+      if bc ~= pb then
+        pb = bc
+        local B = mapping[bc]
+        str = str .. string.format("\27[48;2;%d;%d;%dm",
+          B&0xFF0000, B&0x00FF00, B&0x0000FF)
+      end
+      if fc ~= pf then
+        pf = fc
+        local F = mapping[fc]
+        str = str .. string.format("\27[38;2;%d;%d;%dm",
+          F&0xFF0000, F&0x00FF00, F&0x0000FF)
+      end
+      str = str .. tc
+      return str
+    end)
+    write("\27[", h, ";1H", fgt)
+    flush()
+  end
+end
+
+local function get(x, y, len)
+  if x < 1 or x > w or y < 1 or y > h then
+    error("index out of bounds: " .. y, 3)
+  end
+  len = (len or 1) - 1
+  local txt = unsub(tbuffer[y], x, x + len)
+  if len == 0 then
+    return text,
+      mapping[fbuffer[y]:sub(x, x):byte() + 1],
+      mapping[bbuffer[y]:sub(x, x):byte() + 1]
+  else
+    return text, fbuffer[y]:sub(x, x + len), bbuffer[y]:sub(x, x + len)
+  end
 end
 
 function textgpu.start()
-  usub = modules.sandbox.unicode.sub
+  unsub = modules.sandbox.unicode.sub
-  local _height = 0
   local gpu = {}
-  function gpu.bind() return false, "This is static bound gpu" end
+
-  function gpu.setBackground(color, isPaletteIndex)
+  function gpu.setForeground(color, ispalette)
     checkArg(1, color, "number")
-    checkArg(2, isPaletteIndex, "boolean", "nil")
+    checkArg(2, ispalette, "boolean", "nil")
-    if isPaletteIndex then
+    if ispalette then
-      return --TODO: Maybe?
+      if not palette[color] then
+        error("invalid palette index", 2)
+      end
+      color = palette[color]
     end
-    local old = background
+    local index = math.floor(modules.color.nearest(color, mapping))
-    background = tostring(math.floor(modules.color.nearest(color, mapping)))
+    fg = index or fg
-    write("\x1b[48;5;" .. background:byte() .. "m")
+    return true
-    flush()
-    return mapping[old]
   end
-  function gpu.setForeground(color, isPaletteIndex)
+
+  function gpu.setBackground(color, ispalette)
     checkArg(1, color, "number")
-    checkArg(2, isPaletteIndex, "boolean", "nil")
+    checkArg(2, ispalette, "boolean", "nil")
-    if isPaletteIndex then
+    if ispalette then
-      return --TODO: Maybe?
+      if not palette[color] then
+        error("invalid palette index", 2)
+      end
+      color = palette[color]
     end
-    local old = foreground
+    local index = math.floor(modules.color.nearest(color, mapping))
-    foreground = tostring(math.floor(modules.color.nearest(color, mapping)))
+    bg = index or bg
-    write("\x1b[38;5;" .. foreground:byte() .. "m")
+    return true
-    flush()
-    return mapping[old]
   end
-  function gpu.getBackground()
+
-    return mapping[background], false
+  function gpu.setPaletteColor(c, v)
+    checkArg(1, c, "number")
+    checkArg(2, v, "number")
+    if not palette[c] then
+      error("invalid palette index", 2)
+    end
+    palette[c] = v
   end
+
+  function gpu.getPaletteColor(c)
+    checkArg(1, c, "number")
+    if not palette[c] then
+      error("invalid palette index", 2)
+    end
+    return palette[c]
+  end
+
   function gpu.getForeground()
-    return mapping[foreground], false
+    return mapping[fg]
   end
-  function gpu.getPaletteColor()
+
-    return nil
+  function gpu.getBackground()
-  end
+    return mapping[bg]
-  function gpu.setPaletteColor()
-    return nil
-  end
-  function gpu.maxDepth()
-    return 3
-  end
-  function gpu.setDepth()
-    return false
   end
+
   function gpu.getDepth()
-    return 3
+    return 4
   end
-  function gpu.maxResolution()
+  
-    return termutils.getSize()
+  function gpu.maxDepth()
+    return 4
   end
+
+  function gpu.setDepth()
+    return true
+  end
+
   function gpu.getResolution()
     return termutils.getSize()
   end
-  function gpu.getViewport()
+
-    return termutils.getSize()
+  function gpu.setResolution()
+    return false
   end
-  function gpu.setViewport(w, h)
+
-    checkArg(1, w, "number")
+  gpu.maxResolution = gpu.getResolution
-    checkArg(2, h, "number")
+  gpu.getViewport = gpu.getResolution
-    return false, "Viewport not supported for this gpu"
+  gpu.setViewport = gpu.setResolution
-  end
+
-  function gpu.setResolution(w, h)
+  function gpu.set(x, y, text, vert)
-    checkArg(1, w, "number")
+    checkArg(1, x, "number")
-    checkArg(2, h, "number")
+    checkArg(2, y, "number")
-    return false, "Non resizeable gpu"
+    checkArg(3, text, "string")
+    checkArg(4, vert, "boolean", "nil")
+    if vert then
+      local i = 1
+      local len = utf8.len(text)
+      while i <= len do
+        set(x, y + i - 1, unsub(text, i, i))
+        i = i + 1
+      end
+      return true
+    else
+      set(x, y, text)
+    end
   end
+
   function gpu.get(x, y)
     checkArg(1, x, "number")
     checkArg(2, y, "number")
-    
+    return get(x, y)
-    return tbuffer[y]:sub(x,x), mapping[fbuffer[y]:sub(x,x)], mapping[bbuffer[y]:sub(x,x)]
   end
-  function gpu.set(x, y, value, vertical)
-    checkArg(1, x, "number")
-    checkArg(2, y, "number")
-    checkArg(3, value, "string")
-    checkArg(4, vertical, "boolean", "nil")
-    x = math.floor(x)
-    y = math.floor(y)
-    if not vertical then
-      if not tbuffer[y] then
-        native.log("GPU Set failed: under buffer")
-        return false
-      end
-      tbuffer[y] = insertString(tbuffer[y], value, x)
-      bbuffer[y] = insertString(bbuffer[y], background:rep(utf8.len(value)), x)
-      fbuffer[y] = insertString(fbuffer[y], foreground:rep(utf8.len(value)), x)
-      write("\x1b[" .. y .. ";" .. x .. "H" .. value)
-    else
-      --TODO: Buffers!
-      write("\x1b[" .. y .. ";" .. x .. "H")
-      value:gsub("([%z\1-\127\194-\244][\128-\191]*)", function(c)
-        write(c .. "\x1b[D\x1b[B")
-      end)
-    end
-    flush()
-    return true
-  end
-  function gpu.copy(x, y, w, h, tx, ty) --TODO: Check(check X multiple times)
-    checkArg(1, x, "number")
-    checkArg(2, y, "number")
-    checkArg(3, w, "number")
-    checkArg(4, h, "number")
-    checkArg(5, tx, "number")
-    checkArg(6, ty, "number")
-    local ttbuf = {}
-    local btbuf = {}
-    local ftbuf = {}
-    for i=1, h do
-      if i + y - 2 <= _height and i + y > 1 then
-        ttbuf[i] = tbuffer[y + i - 1] and usub(tbuffer[y + i - 1], x, x + w - 1) or (" "):rep(w)
-        btbuf[i] = bbuffer[y + i - 1] and bbuffer[y + i - 1]:sub(x, x + w - 1) or background:rep(w)
-        ftbuf[i] = fbuffer[y + i - 1] and fbuffer[y + i - 1]:sub(x, x + w - 1) or foreground:rep(w)
-      else
-        ttbuf[i] = (" "):rep(w)
-        btbuf[i] = background:rep(w)
-        ftbuf[i] = foreground:rep(w)
-      end
-    end
-    local bg = background
-    local fg = foreground
 
-    for i=1, h do
+  function gpu.fill(x, y, W, H, c)
-      local line, linex
+    checkArg(1, x, "number")
-      local lwrite = false
+    checkArg(1, y, "number")
-      for j=1, w do
+    checkArg(1, W, "number")
-        if btbuf[i]:sub(j,j) ~= bg then
+    checkArg(1, H, "number")
-          lwrite = true
+    checkArg(1, c, "string")
-        end
+    c = unsub(c, 1, 1)
-        if ftbuf[i]:sub(j,j) ~= fg then
+    if #c == 0 then return true end
-          lwrite = true
+    local str = c:rep(W)
-        end
+    for i=1, h, 1 do
-        if not line then linex = j end
+      set(x, y + i - 1, str)
-        line = (line or "")
-        if lwrite then
-          local wx = (tx + x + linex - 1)|0
-          local wy = (ty + y + i - 1)|0
-          if tbuffer[wy] then
-            write("\x1b[48;5;" .. bg:byte() .. "m\x1b[38;5;" .. fg:byte() .. "m\x1b[" .. wy
-              .. ";" .. wx .. "H" .. line)
-            tbuffer[wy] = insertString(tbuffer[wy], line, wx)
-            bbuffer[wy] = insertString(bbuffer[wy], bg:rep(utf8.len(line)), wx)
-            fbuffer[wy] = insertString(fbuffer[wy], fg:rep(utf8.len(line)), wx)
-          end
-        
-          bg = btbuf[i]:sub(j,j)
-          fg = ftbuf[i]:sub(j,j)
-          line = nil
-          linex = nil
-          lwrite = false
-        end
-        if not line then linex = j end
-        line = (line or "") .. usub(ttbuf[i], j,j)
-      end
-      if line then
-        local wx = (tx + x + linex - 1)|0
-        local wy = (ty + y + i - 1)|0
-        if tbuffer[wy] then
-          write("\x1b[48;5;" .. bg:byte() .. "m\x1b[38;5;" .. fg:byte() .. "m\x1b[" .. wy
-            .. ";" .. wx .. "H" .. line)
-          tbuffer[wy] = insertString(tbuffer[wy], line, wx)
-          bbuffer[wy] = insertString(bbuffer[wy], bg:rep(utf8.len(line)), wx)
-          fbuffer[wy] = insertString(fbuffer[wy], fg:rep(utf8.len(line)), wx)
-        end
-        line = nil
-        linex = nil
-        lwrite = false
-      end
     end
-    write("\x1b[48;5;" .. background:byte() .. "m")
-    write("\x1b[38;5;" .. foreground:byte() .. "m")
-    flush()
     return true
   end
-  function gpu.fill(x, y, w, h, ch)
+
+  function gpu.copy(x, y, W, H, xd, yd)
     checkArg(1, x, "number")
     checkArg(2, y, "number")
-    checkArg(3, w, "number")
+    checkArg(3, W, "number")
-    checkArg(4, h, "number")
+    checkArg(4, H, "number")
-    checkArg(5, ch, "string")
+    checkArg(5, xd, "number")
-    ch = usub(ch, 1, 1):rep(math.floor(w))
+    checkArg(6, yd, "number")
-    for i=1, h do
+    local start, stop, step
-      if i + y - 1 <= _height and i + y > 1 then
+    if yd > 0 then -- moving up - copy from the top down
-        gpu.set(x, y + i - 1, ch)
+      start, stop, step = y, y + H, 1
-      end
+    else -- moving down - copy from the bottom up
+      start, stop, step = y + H, y, -1
     end
+    for i=start, stop, step do
+      local str, fstr, bstr = get(x, i, W)
+      set(x + xd, i + yd, str, fstr, bstr)
+    end
+    fullRefresh()
     return true
   end
 
   local screenAddr
-
   function gpu.getScreen()
     return screenAddr
   end
 
+  function gpu.bind() end
+
   if not termutils.init() then
     return nil, "Cannot initialize terminal based gpu"
   end
   write("\x1b[?25l") --Disable cursor
-  local w, h = gpu.getResolution()
+
-  _height = h
+  w, h = gpu.getResolution()
-  prepareBuffers(w, h)
+  prep(w, h)
+
   gpu.setForeground(0xFFFFFF)
   gpu.setBackground(0x000000)
 

src/lua/core/textgpu_new.lua

@@ -1,319 +0,0 @@
-local textgpu = {}
-
-local write = io.write
-local flush = io.flush
-
-local background = 0x000000 -- "0"
-local foreground = 0xFFFFFF -- "0"
-
-local tbuffer = {}
-local bbuffer = {}
-local fbuffer = {}
-
-local palette = {
-  [0] = 0x0f0f0f,
-  0x1e1e1e,
-  0x2d2d2d,
-  0x3c3c3c,
-  0x4b4b4b,
-  0x5a5a5a,
-  0x696969,
-  0x787878,
-  0x878787,
-  0x969696,
-  0xa5a5a5,
-  0xb4b4b4,
-  0xc3c3c3,
-  0xd2d2d2,
-  0xe1e1e1,
-  0xf0f0f0
-}
-
-local function prepareBuffers(w, h)
-  local tbline = (" "):rep(w)
-  local bbline = ("\0\0\0"):rep(w) -- ("0"):rep(w)
-  local fbline = ("\255\255\255"):rep(w) -- ("7"):rep(w)
-  for i=1, h do
-    tbuffer[i] = tbline
-    bbuffer[i] = bbline
-    fbuffer[i] = fbline
-  end
-end
-
-local function setForeground(c)
-  local r = c & 0xFF0000
-  local g = c & 0x00FF00
-  local b = c & 0x0000FF
-  io.write("\27[38;2;", r, ";", g, ";", b, "m")
-end
-
-local function setBackground(c)
-  local r = c & 0xFF0000
-  local g = c & 0x00FF00
-  local b = c & 0x0000FF
-  io.write("\27[48;2;", r, ";", g, ";", b, "m")
-end
-
-local usub
-local function insertString(main, sub, at)
-  checkArg(1, main, "string")
-  checkArg(2, sub, "string")
-  checkArg(3, at, "number")
-
-  return (usub(main, 1, at - 1) or "")
-    .. sub .. (usub(main, at + (utf8.len(sub) or 0)))
-end
-
-function textgpu.start()
-  usub = modules.sandbox.unicode.sub
-  local _height = 0
-  local gpu = {}
-  function gpu.bind() return false, "This is static bound gpu" end
-  function gpu.setBackground(color, isPaletteIndex)
-    checkArg(1, color, "number")
-    checkArg(2, isPaletteIndex, "boolean", "nil")
-    if isPaletteIndex then
-      if color > 15 or color < 0 then
-        error("invalid palette index", 2)
-      end
-      return palette[color]
-    end
-    local old = background
-    background = color -- tostring(math.floor(modules.color.nearest(color, mapping)))
-    setBackground(background)
-    --write("\x1b[4" .. background .. "m")
-    flush()
-    return old -- mapping[old]
-  end
-  function gpu.setForeground(color, isPaletteIndex)
-    checkArg(1, color, "number")
-    checkArg(2, isPaletteIndex, "boolean", "nil")
-    if isPaletteIndex then
-      if color < 0 or color > 15 then
-        error("invalid palette index", 2)
-      end
-      return palette[color]
-    end
-    local old = foreground
-    foreground = color -- tostring(math.floor(modules.color.nearest(color, mapping)))
-    setForeground(foreground)
-    --write("\x1b[3" .. foreground .. "m")
-    flush()
-    return old -- mapping[old]
-  end
-  function gpu.getBackground()
-    return mapping[background], false
-  end
-  function gpu.getForeground()
-    return mapping[foreground], false
-  end
-  function gpu.getPaletteColor(index)
-    if index < 0 or index > 15 then
-      error("invalid palette index", 2)
-    end
-    return palette[index]
-  end
-  function gpu.setPaletteColor(index, value)
-    if index < 0 or index > 15 then
-      error("invalid palette index", 2)
-    end
-    palette[index] = value
-    return true
-  end
-  function gpu.maxDepth()
-    return 4
-  end
-  function gpu.setDepth()
-    return true
-  end
-  function gpu.getDepth()
-    return 4
-  end
-  function gpu.maxResolution()
-    return termutils.getSize()
-  end
-  function gpu.getResolution()
-    return termutils.getSize()
-  end
-  function gpu.getViewport()
-    return termutils.getSize()
-  end
-  function gpu.setViewport(w, h)
-    checkArg(1, w, "number")
-    checkArg(2, h, "number")
-    return false, "Viewport not supported for this gpu"
-  end
-  function gpu.setResolution(w, h)
-    checkArg(1, w, "number")
-    checkArg(2, h, "number")
-    return false, "Non resizeable gpu"
-  end
-  function gpu.get(x, y)
-    checkArg(1, x, "number")
-    checkArg(2, y, "number")
-    
-    return tbuffer[y]:sub(x,x),
-           fbuffer[y]:sub(x*3-2,x*3):unpack(">I3"),
-           bbuffer[y]:sub(x*3-2,x*3):unpack(">I3")
-  end
-  function gpu.set(x, y, value, vertical)
-    checkArg(1, x, "number")
-    checkArg(2, y, "number")
-    checkArg(3, value, "string")
-    checkArg(4, vertical, "boolean", "nil")
-    x = math.floor(x)
-    y = math.floor(y)
-    if not vertical then
-      if not tbuffer[y] then
-        native.log("GPU Set failed: under buffer")
-        return false
-      end
-      tbuffer[y] = insertString(tbuffer[y], value, x)
-      bbuffer[y] = insertString(bbuffer[y],
-        string.pack(">I3", background):rep(utf8.len(value)), x*3-2)
-      fbuffer[y] = insertString(fbuffer[y],
-        string.pack(">I3", foreground):rep(utf8.len(value)), x*3-2)
-      write("\x1b[" .. y .. ";" .. x .. "H" .. value)
-    else
-      --TODO: Buffers!
-      write("\x1b[" .. y .. ";" .. x .. "H")
-      value:gsub("([%z\1-\127\194-\244][\128-\191]*)", function(c)
-        write(c .. "\x1b[D\x1b[B")
-      end)
-    end
-    flush()
-    return true
-  end
-  function gpu.copy(x, y, w, h, tx, ty) --TODO: Check(check X multiple times)
-    checkArg(1, x, "number")
-    checkArg(2, y, "number")
-    checkArg(3, w, "number")
-    checkArg(4, h, "number")
-    checkArg(5, tx, "number")
-    checkArg(6, ty, "number")
-    local ttbuf = {}
-    local btbuf = {}
-    local ftbuf = {}
-    for i=1, h do
-      if i + y - 2 <= _height and i + y > 1 then
-        ttbuf[i] = tbuffer[y + i - 1] and usub(tbuffer[y + i - 1], x, x + w - 1) or (" "):rep(w)
-        btbuf[i] = bbuffer[y + i - 1] and
-          bbuffer[y + i - 1]:sub(x*3-2, (x + w - 1)*3) or string.pack(">I3", background):rep(w)
-        ftbuf[i] = fbuffer[y + i - 1] and
-          fbuffer[y + i - 1]:sub(x*3-2, (x + w - 1)*3) or string.pack(">I3", foreground):rep(w)
-      else
-        ttbuf[i] = (" "):rep(w)
-        btbuf[i] = string.pack(">I3", background):rep(w)
-        ftbuf[i] = string.pack(">I3", foreground):rep(w)
-      end
-    end
-    local bg = background
-    local fg = foreground
-
-    for i=1, h do
-      local line, linex
-      local lwrite = false
-      for j=1, w do
-        if btbuf[i]:sub(j*3-2,j*3):unpack(">I3") ~= bg then
-          lwrite = true
-        end
-        if ftbuf[i]:sub(j*3-2,j*3):unpack(">I3") ~= fg then
-          lwrite = true
-        end
-        if not line then linex = j end
-        line = (line or "")
-        if lwrite then
-          local wx = (tx + x + linex - 1)|0
-          local wy = (ty + y + i - 1)|0
-          if tbuffer[wy] then
-            setBackground(bg)
-            setForeground(foreground)
-            --write("\x1b[4" .. bg .. "m\x1b[3" .. fg .. "m
-            write("\x1b[" .. wy .. ";" .. wx .. "H" .. line)
-            tbuffer[wy] = insertString(tbuffer[wy], line, wx)
-            bbuffer[wy] = insertString(bbuffer[wy],
-              string.pack(">I3", bg):rep(utf8.len(line)), wx*3-2)
-            fbuffer[wy] = insertString(fbuffer[wy],
-              string.pack(">I3", fg):rep(utf8.len(line)), wx*3-2)
-          end
-        
-          bg = btbuf[i]:sub(j*3-2,j*3):unpack(">I3")
-          fg = ftbuf[i]:sub(j*3-2,j*3):unpack(">I3")
-          line = nil
-          linex = nil
-          lwrite = false
-        end
-        if not line then linex = j end
-        line = (line or "") .. usub(ttbuf[i], j,j)
-      end
-      if line then
-        local wx = (tx + x + linex - 1)|0
-        local wy = (ty + y + i - 1)|0
-        if tbuffer[wy] then
-          setBackground(bg)
-          setForeground(fg)
-          --write("\x1b[4" .. bg .. "m\x1b[3" .. fg .. "m
-          write("\x1b[" .. wy .. ";" .. wx .. "H" .. line)
-          tbuffer[wy] = insertString(tbuffer[wy], line, wx)
-          bbuffer[wy] = insertString(bbuffer[wy],
-            string.pack(">I3", bg):rep(utf8.len(line)), wx*3-2)
-          fbuffer[wy] = insertString(fbuffer[wy],
-            string.pack(">I3", fg):rep(utf8.len(line)), wx*3-2)
-        end
-        line = nil
-        linex = nil
-        lwrite = false
-      end
-    end
-    setBackground(background)
-    setForeground(foreground)
-    --write("\x1b[4" .. background .. "m")
-    --write("\x1b[3" .. foreground .. "m")
-    flush()
-    return true
-  end
-  function gpu.fill(x, y, w, h, ch)
-    checkArg(1, x, "number")
-    checkArg(2, y, "number")
-    checkArg(3, w, "number")
-    checkArg(4, h, "number")
-    checkArg(5, ch, "string")
-    ch = usub(ch, 1, 1):rep(math.floor(w))
-    for i=1, h do
-      if i + y - 1 <= _height and i + y > 1 then
-        gpu.set(x, y + i - 1, ch)
-      end
-    end
-    return true
-  end
-
-  local screenAddr
-
-  function gpu.getScreen()
-    return screenAddr
-  end
-
-  if not termutils.init() then
-    return nil, "Cannot initialize terminal based gpu"
-  end
-  write("\x1b[?25l") --Disable cursor
-  local w, h = gpu.getResolution()
-  _height = h
-  prepareBuffers(w, h)
-  gpu.setForeground(0xFFFFFF)
-  gpu.setBackground(0x000000)
-
-  local gpuaddr = modules.component.api.register(nil, "gpu", gpu)
-  screenAddr = modules.component.api.register(nil, "screen", {getKeyboards = function() return {"TODO:SetThisUuid"} end}) --verry dummy screen, TODO: make it better, kbd uuid also in epoll.c
-  modules.component.api.register("TODO:SetThisUuid", "keyboard", {})
-
-  deadhooks[#deadhooks + 1] = function()
-    write("\x1b[?25h\x1b[" .. ((h-1)|0) .. ";1H") --Enable cursor on quit
-    io.flush()
-    termutils.restore()
-  end
-
-  return gpuaddr
-end
-
-return textgpu