diff options
Diffstat (limited to 'c_src/sdl_hints.c')
-rw-r--r-- | c_src/sdl_hints.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/c_src/sdl_hints.c b/c_src/sdl_hints.c new file mode 100644 index 0000000..fe4eceb --- /dev/null +++ b/c_src/sdl_hints.c @@ -0,0 +1,101 @@ +// Copyright (c) 2015, Loïc Hoguin <[email protected]> +// +// Permission to use, copy, modify, and/or distribute this software for any +// purpose with or without fee is hereby granted, provided that the above +// copyright notice and this permission notice appear in all copies. +// +// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + +#include "esdl2.h" + +// SDL_HintCallback + +typedef struct esdl2_callback { + char* module; + char* function; +} esdl2_callback; + +void esdl2_hint_callback(void* userdata, const char* name, const char* oldValue, const char* newValue) +{ + ErlNifEnv* env = enif_alloc_env(); + esdl2_callback* callback = (esdl2_callback*)userdata; + ERL_NIF_TERM old; + ERL_NIF_TERM new; + + if (oldValue == NULL) + old = atom_undefined; + else + old = enif_make_string(env, oldValue, ERL_NIF_LATIN1); + + if (newValue == NULL) + new = atom_undefined; + else + new = enif_make_string(env, newValue, ERL_NIF_LATIN1); + + enif_send(NULL, get_callback_process(), env, + enif_make_tuple4(env, atom_callback, + enif_make_atom(env, callback->module), + enif_make_atom(env, callback->function), + enif_make_list3(env, + enif_make_string(env, name, ERL_NIF_LATIN1), + old, + new))); + + enif_free_env(env); +} + +// add_hint_callback +// @todo We must free the userdata in SDL_DelHintCallback. + +NIF_CAST_HANDLER(thread_add_hint_callback) +{ + esdl2_callback* callback = (esdl2_callback*)enif_alloc(sizeof(esdl2_callback)); + + callback->module = args[1]; + callback->function = args[2]; + + SDL_AddHintCallback(args[0], &esdl2_hint_callback, callback); + + enif_free(args[0]); +} + +NIF_FUNCTION(add_hint_callback) +{ + unsigned int hint_len, module_len, function_len; + char* hint; + char* module; + char* function; + + BADARG_IF(!enif_get_list_length(env, argv[0], &hint_len)); + BADARG_IF(!enif_get_atom_length(env, argv[1], &module_len, ERL_NIF_LATIN1)); + BADARG_IF(!enif_get_atom_length(env, argv[2], &function_len, ERL_NIF_LATIN1)); + + hint = (char*)enif_alloc(hint_len + 1); + if (!enif_get_string(env, argv[0], hint, hint_len + 1, ERL_NIF_LATIN1)) { + enif_free(hint); + return enif_make_badarg(env); + } + + module = (char*)enif_alloc(module_len + 1); + if (!enif_get_atom(env, argv[1], module, module_len + 1, ERL_NIF_LATIN1)) { + enif_free(hint); + enif_free(module); + return enif_make_badarg(env); + } + + function = (char*)enif_alloc(function_len + 1); + if (!enif_get_atom(env, argv[2], function, function_len + 1, ERL_NIF_LATIN1)) { + enif_free(hint); + enif_free(module); + enif_free(function); + return enif_make_badarg(env); + } + + return nif_thread_cast(env, thread_add_hint_callback, 3, hint, module, function); +} |