From 276a44441d8795cd29a215dff35ab6aefcdc6557 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= <essen@ninenines.eu>
Date: Wed, 21 Oct 2015 03:41:03 +0200
Subject: Add sdl_hints:add_callback/3 function

This also sets up esdl2 to start accepting callbacks.
The module/process esdl2_callbacks must always be running
for that purpose, so esdl2 was made an OTP application
instead of a simple library.

Implementation of the rest of SDL_hints will follow in
subsequent commits.
---
 src/esdl2.erl | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/esdl2.erl')

diff --git a/src/esdl2.erl b/src/esdl2.erl
index 3e0db38..7bacb71 100644
--- a/src/esdl2.erl
+++ b/src/esdl2.erl
@@ -14,6 +14,9 @@
 
 -module(esdl2).
 
+%% internal
+-export([register_callback_process/0]).
+
 %% sdl
 -export([init/1]).
 -export([init_subsystem/1]).
@@ -53,6 +56,9 @@
 -export([gl_create_context/1]).
 -export([gl_swap_window/1]).
 
+%% sdl_hints
+-export([add_hint_callback/3]).
+
 %% sdl_keyboard
 -export([is_text_input_active/0]).
 -export([start_text_input/0]).
@@ -137,6 +143,8 @@
 -export([set_window_title/2]).
 -export([show_window/1]).
 
+%% internal
+
 %% @todo We probably want to accept an env variable or somthing for the location.
 -on_load(on_load/0).
 on_load() ->
@@ -149,6 +157,9 @@ on_load() ->
 	end,
 	erlang:load_nif(filename:join(PrivDir, atom_to_list(?MODULE)), 0).
 
+register_callback_process() ->
+	erlang:nif_error({not_loaded, ?MODULE}).
+
 %% sdl
 
 init(_) ->
@@ -242,6 +253,11 @@ gl_create_context(_) ->
 gl_swap_window(_) ->
 	erlang:nif_error({not_loaded, ?MODULE}).
 
+%% sdl_hints
+
+add_hint_callback(_, _, _) ->
+	erlang:nif_error({not_loaded, ?MODULE}).
+
 %% sdl_keyboard
 
 is_text_input_active() ->
-- 
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