fix DrawText func && add enum with text encoding && update manual && other

doc/manual.md

@@ -12,18 +12,70 @@ local syscalls = require("syscalls")
 syscalls.Event.<EventName>
 ```
 
-
++ `Redraw`
++ `Button`
++ `Key`
++ `Desktop`
++ `Mouse`
++ `Network`
++ `IPC`
++ `Debug`
 
 ## Graphic
 
+### Text encoding
 
++ `cp866`
++ `utf8`
++ `utf16`
+
+### Text sizes
+
+```lua
+syscalls.textSize.<value>
+```
+
++ `6x9` (cp866 only)
++ `8x16`
++ `12x18` (cp866 only)
++ `16x32`
++ `18x27` (cp866 only)
++ `24x36` (cp866 only)
++ `24x48`
++ `30x45` (cp866 only)
++ `32x64`
++ `36x54` (cp866 only)
++ `40x80`
++ `42x63` (cp866 only)
++ `48x72` (cp866 only)
++ `48x96`
++ `56x112`
++ `64x128`
+
+### `DrawText(text, xPos, yPos, textColor, textSize, textLen, backgroundColor, encoding)`
+
+Draw text.
+
+textSize, textLen, backgroundColor, encoding are optional.
+
+### `DrawLine(x1, y1, x2, y2)`
+
+### `DrawRectangle(x, y, w, h color)`
+
+### `ReadPoint(x, y)`
+
+return color
 
 ## Sockets
 
-### OpenSocket
+### `OpenSocket(domain, type, protocol)`
 
 ```lua
-local socket, err = syscalls.OpenSocket()
+local socket, err = syscalls.OpenSocket(
+	syscalls.SOCK.STREAM, 
+	syscalls.AF.INET,
+	syscalls.IPPROTO.IP
+)
 
 if err then
 	print("Error", err)
@@ -32,9 +84,9 @@ else
 end
 ```
 
-### CloseSocket(socket)
+### `CloseSocket(socket)`
 
-### PairSocket()
+### `PairSocket()`
 
 ```lua
 local first, second = PairSocket()
@@ -46,19 +98,19 @@ else
 end
 ```
 
-### Bind(socket, address)
+### `Bind(socket, address)`
 
-### Listen(socket, backlog)
+### `Listen(socket, backlog)`
 
-### Connect()
+### `Connect(socket, address)`
 
-### Accept
+### `Accept(socket, , flags)`
 
-### Receive
+### `Receive(socket, , flags)`
 
-## SetSocketOption
+### `SetSocketOption(socket, opt)`
 
-### GetSocketOption
+### `GetSocketOption(socket, opt)`
 
 ### Socket types