%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2017. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%%-------------------------------------------------------------------
%%% File : wxe_server.erl
%%% Author : Dan Gudmundsson <[email protected]>
%%% Description :
%%%
%%% Created : 17 Jan 2007 by Dan Gudmundsson <[email protected]>
%%%-------------------------------------------------------------------
%% @hidden
-module(wxe_master).
-behaviour(gen_server).
%% API
-export([start/1, init_port/1, init_opengl/0, fetch_msgs/0]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-record(state, {cb_port, %% Callback port and to erlang messages goes via it.
users, %% List of wx servers, needed ??
driver, %% Driver name so wx_server can create it's own port
msgs=[] %% Early messages (such as openfiles on OSX)
}).
-include("wxe.hrl").
-include("gen/wxe_debug.hrl").
-define(DRIVER, "wxe_driver").
%%====================================================================
%% API
%%====================================================================
%%--------------------------------------------------------------------
%% Function: start(SilentStart) -> {ok,Pid} | ignore | {error,Error}
%% Description: Starts the server
%%--------------------------------------------------------------------
start(SilentStart) ->
gen_server:start({local, ?MODULE}, ?MODULE, [SilentStart], []).
%%--------------------------------------------------------------------
%% Function: init_port(SilentStart) -> {UserPort,CallBackPort} | error(Error)
%% Description: Creates the port
%%--------------------------------------------------------------------
init_port(SilentStart) ->
case whereis(?MODULE) of
undefined ->
case start(SilentStart) of
{ok,Pid} -> Pid;
{error,{already_started,Pid}} -> Pid;
{error, {Reason,Stack}} ->
erlang:raise(error, Reason, Stack)
end;
Pid ->
Pid
end,
{Driver, CBport} = gen_server:call(?MODULE, init_port, infinity),
Port = open_port({spawn,Driver},[binary]),
receive wx_port_initiated -> ok end,
{Port, CBport}.
%%--------------------------------------------------------------------
%% Initalizes the opengl library
%%--------------------------------------------------------------------
init_opengl() ->
case get(wx_init_opengl) of
true -> {ok, "already initialized"};
_ ->
GLLib = wxe_util:wxgl_dl(),
Res = wxe_util:call(?WXE_INIT_OPENGL, <<(list_to_binary(GLLib))/binary, 0:8>>),
element(1, Res) =:= ok andalso put(wx_init_opengl, true),
Res
end.
%%--------------------------------------------------------------------
%% Fetch early messages, hack to get start up args on mac
%%--------------------------------------------------------------------
fetch_msgs() ->
gen_server:call(?MODULE, fetch_msgs, infinity).
%%====================================================================
%% gen_server callbacks
%%====================================================================
%%--------------------------------------------------------------------
%% Function: init(Args) -> {ok, State} |
%% {ok, State, Timeout} |
%% ignore |
%% {stop, Reason}
%% Description: Initiates the server
%%--------------------------------------------------------------------
init([SilentStart]) ->
DriverName = ?DRIVER,
PrivDir = wxe_util:priv_dir(?DRIVER, SilentStart),
erlang:group_leader(whereis(init), self()),
case catch erlang:system_info(smp_support) of
true -> ok;
_ ->
wxe_util:opt_error_log(SilentStart,
"WX ERROR: SMP emulator required"
" (start with erl -smp)",
[]),
erlang:error(not_smp)
end,
case erl_ddll:load_driver(PrivDir,DriverName) of
ok -> ok;
{error, What} ->
wxe_util:opt_error_log(SilentStart,
"WX Failed loading ~p@~p ~n",
[DriverName,PrivDir]),
Str = erl_ddll:format_error(What),
erlang:error({load_driver,Str})
end,
process_flag(trap_exit, true),
DriverWithArgs = DriverName ++ " " ++ code:priv_dir(wx),
try
Port = open_port({spawn, DriverWithArgs},[binary]),
wx_debug_info = ets:new(wx_debug_info, [named_table]),
wx_non_consts = ets:new(wx_non_consts, [named_table]),
true = ets:insert(wx_debug_info, wxdebug_table()),
spawn_link(fun() -> debug_ping(Port) end),
receive
{wx_consts, List} ->
true = ets:insert(wx_non_consts, List)
end,
{ok, #state{cb_port=Port, driver=DriverName, users=gb_sets:empty()}}
catch _:Err ->
error({Err, "Could not initiate graphics"})
end.
%%--------------------------------------------------------------------
%% Function: %% handle_call(Request, From, State) -> {reply, Reply, State} |
%% {reply, Reply, State, Timeout} |
%% {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, Reply, State} |
%% {stop, Reason, State}
%% Description: Handling call messages
%%--------------------------------------------------------------------
handle_call(init_port, From, State=#state{driver=Driver,cb_port=CBPort, users=Users}) ->
{reply, {Driver,CBPort}, State#state{users=gb_sets:add(From,Users)}};
handle_call(fetch_msgs, _From, State=#state{msgs=Msgs}) ->
{reply, lists:reverse(Msgs), State#state{msgs=[]}};
handle_call(_Request, _From, State) ->
%%io:format("Unknown request ~p sent to ~p from ~p ~n",[_Request, ?MODULE, _From]),
Reply = ok,
{reply, Reply, State}.
%%--------------------------------------------------------------------
%% Function: handle_cast(Msg, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% Description: Handling cast messages
%%--------------------------------------------------------------------
handle_cast(_Msg, State) ->
%%io:format("Unknown message ~p sent to ~p~n",[_Msg, ?MODULE]),
{noreply, State}.
%%--------------------------------------------------------------------
%% Function: handle_info(Info, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% Description: Handling all non call/cast messages
%%--------------------------------------------------------------------
handle_info({wxe_driver, error, Msg}, State) ->
error_logger:error_report([{wx, error}, {message, lists:flatten(Msg)}]),
{noreply, State};
handle_info({wxe_driver, internal_error, Msg}, State) ->
error_logger:error_report([{wx, internal_error}, {message, lists:flatten(Msg)}]),
{noreply, State};
handle_info({wxe_driver, debug, Msg}, State) ->
io:format("WX DBG: ~s~n", [Msg]),
{noreply, State};
handle_info({wxe_driver, open_file, File}, State=#state{msgs=Msgs}) ->
{noreply, State#state{msgs=[File|Msgs]}};
handle_info(_Info, State) ->
io:format("Unknown message ~p sent to ~p~n",[_Info, ?MODULE]),
{noreply, State}.
%%--------------------------------------------------------------------
%% Function: terminate(Reason, State) -> void()
%% Description: This function is called by a gen_server when it is about to
%% terminate. It should be the opposite of Module:init/1 and do any necessary
%% cleaning up. When it returns, the gen_server terminates with Reason.
%% The return value is ignored.
%%--------------------------------------------------------------------
terminate(_Reason, _State) ->
erlang:display({?MODULE, killed, process_info(self(),trap_exit),_Reason}),
ok.
%%--------------------------------------------------------------------
%% Func: code_change(OldVsn, State, Extra) -> {ok, NewState}
%% Description: Convert process state when code is changed
%%--------------------------------------------------------------------
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
%%%%%%%%%%%% INTERNAL %%%%%%%%%%%%%%%%%%%%%%%%
debug_ping(Port) ->
timer:sleep(1*333),
_R = (catch erlang:port_call(Port, 0, [])),
%% io:format("Erlang ping ~p ~n", [_R]),
debug_ping(Port).
