Method CheckPen

library/LuaApi.cpp:655–681

}

void Lua::CheckPen(lua_State *L, Screen::Pen *pen, int index, bool allow_nil, bool allow_color)
{
    index = lua_absindex(L, index);

    luaL_checkany(L, index);

    if (lua_isnil(L, index))
    {
        if (!allow_nil)
            luaL_argerror(L, index, "nil pen not allowed");

        *pen = Pen(0,0,0,-1);
    }
    else if (lua_isuserdata(L, index))
    {
        *pen = *check_pen_native(L, index);
    }
    else if (allow_color && lua_isnumber(L, index))
    {
        *pen = Pen(0, lua_tointeger(L, index)&15, 0);
    }
    else
    {
        luaL_checktype(L, index, LUA_TTABLE);
        decode_pen(L, *pen, index);
    }
}

static int adjust_pen(lua_State *L, bool no_copy)
{