[libpicofe.git] / in_sdl.c

/*
 * (C) Gražvydas "notaz" Ignotas, 2012
 *
 * This work is licensed under the terms of any of these licenses
 * (at your option):
 *  - GNU GPL, version 2 or later.
 *  - GNU LGPL, version 2.1 or later.
 *  - MAME license.
 * See the COPYING file in the top-level directory.
 */

#include <stdio.h>
#include <SDL.h>
#include "input.h"
#include "in_sdl.h"

#define IN_SDL_PREFIX "sdl:"
/* should be machine word for best performace */
typedef unsigned long keybits_t;
#define KEYBITS_WORD_BITS (sizeof(keybits_t) * 8)

struct in_sdl_state {
	SDL_Joystick *joy;
	int joy_id;
	int axis_keydown[2];
	keybits_t keystate[SDLK_LAST / KEYBITS_WORD_BITS + 1];
};

static void (*ext_event_handler)(void *event);

static const char * const in_sdl_keys[SDLK_LAST] = {
	[SDLK_BACKSPACE] = "backspace",
	[SDLK_TAB] = "tab",
	[SDLK_CLEAR] = "clear",
	[SDLK_RETURN] = "return",
	[SDLK_PAUSE] = "pause",
	[SDLK_ESCAPE] = "escape",
	[SDLK_SPACE] = "space",
	[SDLK_EXCLAIM]  = "!",
	[SDLK_QUOTEDBL]  = "\"",
	[SDLK_HASH]  = "#",
	[SDLK_DOLLAR]  = "$",
	[SDLK_AMPERSAND]  = "&",
	[SDLK_QUOTE] = "'",
	[SDLK_LEFTPAREN] = "(",
	[SDLK_RIGHTPAREN] = ")",
	[SDLK_ASTERISK] = "*",
	[SDLK_PLUS] = "+",
	[SDLK_COMMA] = ",",
	[SDLK_MINUS] = "-",
	[SDLK_PERIOD] = ".",
	[SDLK_SLASH] = "/",
	[SDLK_0] = "0",
	[SDLK_1] = "1",
	[SDLK_2] = "2",
	[SDLK_3] = "3",
	[SDLK_4] = "4",
	[SDLK_5] = "5",
	[SDLK_6] = "6",
	[SDLK_7] = "7",
	[SDLK_8] = "8",
	[SDLK_9] = "9",
	[SDLK_COLON] = ":",
	[SDLK_SEMICOLON] = ";",
	[SDLK_LESS] = "<",
	[SDLK_EQUALS] = "=",
	[SDLK_GREATER] = ">",
	[SDLK_QUESTION] = "?",
	[SDLK_AT] = "@",
	[SDLK_LEFTBRACKET] = "[",
	[SDLK_BACKSLASH] = "\\",
	[SDLK_RIGHTBRACKET] = "]",
	[SDLK_CARET] = "^",
	[SDLK_UNDERSCORE] = "_",
	[SDLK_BACKQUOTE] = "`",
	[SDLK_a] = "a",
	[SDLK_b] = "b",
	[SDLK_c] = "c",
	[SDLK_d] = "d",
	[SDLK_e] = "e",
	[SDLK_f] = "f",
	[SDLK_g] = "g",
	[SDLK_h] = "h",
	[SDLK_i] = "i",
	[SDLK_j] = "j",
	[SDLK_k] = "k",
	[SDLK_l] = "l",
	[SDLK_m] = "m",
	[SDLK_n] = "n",
	[SDLK_o] = "o",
	[SDLK_p] = "p",
	[SDLK_q] = "q",
	[SDLK_r] = "r",
	[SDLK_s] = "s",
	[SDLK_t] = "t",
	[SDLK_u] = "u",
	[SDLK_v] = "v",
	[SDLK_w] = "w",
	[SDLK_x] = "x",
	[SDLK_y] = "y",
	[SDLK_z] = "z",
	[SDLK_DELETE] = "delete",

	[SDLK_KP0] = "[0]",
	[SDLK_KP1] = "[1]",
	[SDLK_KP2] = "[2]",
	[SDLK_KP3] = "[3]",
	[SDLK_KP4] = "[4]",
	[SDLK_KP5] = "[5]",
	[SDLK_KP6] = "[6]",
	[SDLK_KP7] = "[7]",
	[SDLK_KP8] = "[8]",
	[SDLK_KP9] = "[9]",
	[SDLK_KP_PERIOD] = "[.]",
	[SDLK_KP_DIVIDE] = "[/]",
	[SDLK_KP_MULTIPLY] = "[*]",
	[SDLK_KP_MINUS] = "[-]",
	[SDLK_KP_PLUS] = "[+]",
	[SDLK_KP_ENTER] = "enter",
	[SDLK_KP_EQUALS] = "equals",

	[SDLK_UP] = "up",
	[SDLK_DOWN] = "down",
	[SDLK_RIGHT] = "right",
	[SDLK_LEFT] = "left",
	[SDLK_INSERT] = "insert",
	[SDLK_HOME] = "home",
	[SDLK_END] = "end",
	[SDLK_PAGEUP] = "page up",
	[SDLK_PAGEDOWN] = "page down",

	[SDLK_F1] = "f1",
	[SDLK_F2] = "f2",
	[SDLK_F3] = "f3",
	[SDLK_F4] = "f4",
	[SDLK_F5] = "f5",
	[SDLK_F6] = "f6",
	[SDLK_F7] = "f7",
	[SDLK_F8] = "f8",
	[SDLK_F9] = "f9",
	[SDLK_F10] = "f10",
	[SDLK_F11] = "f11",
	[SDLK_F12] = "f12",
	[SDLK_F13] = "f13",
	[SDLK_F14] = "f14",
	[SDLK_F15] = "f15",

	[SDLK_NUMLOCK] = "numlock",
	[SDLK_CAPSLOCK] = "caps lock",
	[SDLK_SCROLLOCK] = "scroll lock",
	[SDLK_RSHIFT] = "right shift",
	[SDLK_LSHIFT] = "left shift",
	[SDLK_RCTRL] = "right ctrl",
	[SDLK_LCTRL] = "left ctrl",
	[SDLK_RALT] = "right alt",
	[SDLK_LALT] = "left alt",
	[SDLK_RMETA] = "right meta",
	[SDLK_LMETA] = "left meta",
	[SDLK_LSUPER] = "left super",	/* "Windows" keys */
	[SDLK_RSUPER] = "right super",	
	[SDLK_MODE] = "alt gr",
	[SDLK_COMPOSE] = "compose",
};

static void in_sdl_probe(void)
{
	struct in_sdl_state *state;
	SDL_Joystick *joy;
	int i, joycount;
	char name[256];

	state = calloc(1, sizeof(*state));
	if (state == NULL) {
		fprintf(stderr, "in_sdl: OOM\n");
		return;
	}

	in_register(IN_SDL_PREFIX "keys", -1, state, SDLK_LAST,
		in_sdl_keys, 0);

	/* joysticks go here too */
	SDL_InitSubSystem(SDL_INIT_JOYSTICK);

	joycount = SDL_NumJoysticks();
	for (i = 0; i < joycount; i++) {
		joy = SDL_JoystickOpen(i);
		if (joy == NULL)
			continue;

		state = calloc(1, sizeof(*state));
		if (state == NULL) {
			fprintf(stderr, "in_sdl: OOM\n");
			break;
		}
		state->joy = joy;
		state->joy_id = i;

		snprintf(name, sizeof(name), IN_SDL_PREFIX "%s", SDL_JoystickName(i));
		in_register(name, -1, state, SDLK_LAST, in_sdl_keys, 0);
	}

	if (joycount > 0)
		SDL_JoystickEventState(SDL_ENABLE);
}

static void in_sdl_free(void *drv_data)
{
	struct in_sdl_state *state = drv_data;

	if (state != NULL) {
		if (state->joy != NULL)
			SDL_JoystickClose(state->joy);
		free(state);
	}
}

static const char * const *
in_sdl_get_key_names(int *count)
{
	*count = SDLK_LAST;
	return in_sdl_keys;
}

/* could use SDL_GetKeyState, but this gives better packing */
static void update_keystate(keybits_t *keystate, int sym, int is_down)
{
	keybits_t *ks_word, mask;

	mask = 1;
	mask <<= sym & (KEYBITS_WORD_BITS - 1);
	ks_word = keystate + sym / KEYBITS_WORD_BITS;
	if (is_down)
		*ks_word |= mask;
	else
		*ks_word &= ~mask;
}

static int handle_event(struct in_sdl_state *state, SDL_Event *event,
	int *kc_out, int *down_out)
{
	if (event->type != SDL_KEYDOWN && event->type != SDL_KEYUP)
		return -1;

	update_keystate(state->keystate, event->key.keysym.sym,
		event->type == SDL_KEYDOWN);
	if (kc_out != NULL)
		*kc_out = event->key.keysym.sym;
	if (down_out != NULL)
		*down_out = event->type == SDL_KEYDOWN;

	return 1;
}

static int handle_joy_event(struct in_sdl_state *state, SDL_Event *event,
	int *kc_out, int *down_out)
{
	int kc = -1, down = 0, ret = 0;

	/* TODO: remaining axis */
	switch (event->type) {
	case SDL_JOYAXISMOTION:
		if (event->jaxis.which != state->joy_id)
			return -2;
		if (event->jaxis.axis > 1)
			break;
		if (-16384 <= event->jaxis.value && event->jaxis.value <= 16384) {
			kc = state->axis_keydown[event->jaxis.axis];
			state->axis_keydown[event->jaxis.axis] = 0;
			ret = 1;
		}
		else if (event->jaxis.value < -16384) {
			kc = state->axis_keydown[event->jaxis.axis];
			if (kc)
				update_keystate(state->keystate, kc, 0);
			kc = event->jaxis.axis ? SDLK_UP : SDLK_LEFT;
			state->axis_keydown[event->jaxis.axis] = kc;
			down = 1;
			ret = 1;
		}
		else if (event->jaxis.value > 16384) {
			kc = state->axis_keydown[event->jaxis.axis];
			if (kc)
				update_keystate(state->keystate, kc, 0);
			kc = event->jaxis.axis ? SDLK_DOWN : SDLK_RIGHT;
			state->axis_keydown[event->jaxis.axis] = kc;
			down = 1;
			ret = 1;
		}
		break;

	case SDL_JOYBUTTONDOWN:
	case SDL_JOYBUTTONUP:
		if (event->jbutton.which != state->joy_id)
			return -2;
		kc = (int)event->jbutton.button + SDLK_WORLD_0;
		down = event->jbutton.state == SDL_PRESSED;
		ret = 1;
		break;
	default:
		return -1;
	}

	if (ret)
		update_keystate(state->keystate, kc, down);
	if (kc_out != NULL)
		*kc_out = kc;
	if (down_out != NULL)
		*down_out = down;

	return ret;
}

#define JOY_EVENTS (SDL_JOYAXISMOTIONMASK | SDL_JOYBALLMOTIONMASK | SDL_JOYHATMOTIONMASK \
		    | SDL_JOYBUTTONDOWNMASK | SDL_JOYBUTTONUPMASK)

static int collect_events(struct in_sdl_state *state, int *one_kc, int *one_down)
{
	SDL_Event events[4];
	Uint32 mask = state->joy ? JOY_EVENTS : (SDL_ALLEVENTS & ~JOY_EVENTS);
	int count, maxcount;
	int i, ret, retval = 0;
	int num_events, num_peeped_events;
	SDL_Event *event;

	maxcount = (one_kc != NULL) ? 1 : sizeof(events) / sizeof(events[0]);

	SDL_PumpEvents();

	num_events = SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, mask);

	for (num_peeped_events = 0; num_peeped_events < num_events; num_peeped_events += count) {
		count = SDL_PeepEvents(events, maxcount, SDL_GETEVENT, mask);
		if (count <= 0)
			break;
		for (i = 0; i < count; i++) {
			event = &events[i];
			if (state->joy)
				ret = handle_joy_event(state,
					event, one_kc, one_down);
			else
				ret = handle_event(state,
					event, one_kc, one_down);
			if (ret < 0) {
				switch (ret) {
					case -2:
						SDL_PushEvent(event);
						break;
					default:
						if (ext_event_handler != NULL)
							ext_event_handler(event);
						break;
				}
				continue;
			}

			retval |= ret;
			if (one_kc != NULL && ret)
			{
				// don't lose events other devices might want to handle
				for (i++; i < count; i++)
					SDL_PushEvent(&events[i]);
				goto out;
			}
		}
	}

out:
	return retval;
}

static int in_sdl_update(void *drv_data, const int *binds, int *result)
{
	struct in_sdl_state *state = drv_data;
	keybits_t mask;
	int i, sym, bit, b;

	collect_events(state, NULL, NULL);

	for (i = 0; i < SDLK_LAST / KEYBITS_WORD_BITS + 1; i++) {
		mask = state->keystate[i];
		if (mask == 0)
			continue;
		for (bit = 0; mask != 0; bit++, mask >>= 1) {
			if ((mask & 1) == 0)
				continue;
			sym = i * KEYBITS_WORD_BITS + bit;

			for (b = 0; b < IN_BINDTYPE_COUNT; b++)
				result[b] |= binds[IN_BIND_OFFS(sym, b)];
		}
	}

	return 0;
}

static int in_sdl_update_keycode(void *drv_data, int *is_down)
{
	struct in_sdl_state *state = drv_data;
	int ret_kc = -1, ret_down = 0;

	collect_events(state, &ret_kc, &ret_down);

	if (is_down != NULL)
		*is_down = ret_down;

	return ret_kc;
}

struct menu_keymap {
	short key;
	short pbtn;
};

static const struct menu_keymap key_pbtn_map[] =
{
	{ SDLK_UP,	PBTN_UP },
	{ SDLK_DOWN,	PBTN_DOWN },
	{ SDLK_LEFT,	PBTN_LEFT },
	{ SDLK_RIGHT,	PBTN_RIGHT },
	/* XXX: maybe better set this from it's plat code somehow */
	{ SDLK_RETURN,	PBTN_MOK },
	{ SDLK_ESCAPE,	PBTN_MBACK },
	{ SDLK_SEMICOLON,    PBTN_MA2 },
	{ SDLK_QUOTE,        PBTN_MA3 },
	{ SDLK_BACKSLASH,    PBTN_MENU },
	{ SDLK_LEFTBRACKET,  PBTN_L },
	{ SDLK_RIGHTBRACKET, PBTN_R },
};
#define KEY_PBTN_MAP_SIZE (sizeof(key_pbtn_map) / sizeof(key_pbtn_map[0]))

static const struct menu_keymap joybtn_pbtn_map[] =
{
	{ SDLK_UP,	PBTN_UP },
	{ SDLK_DOWN,	PBTN_DOWN },
	{ SDLK_LEFT,	PBTN_LEFT },
	{ SDLK_RIGHT,	PBTN_RIGHT },
	/* joystick */
	{ SDLK_WORLD_0,	PBTN_MOK },
	{ SDLK_WORLD_1,	PBTN_MBACK },
	{ SDLK_WORLD_2,	PBTN_MA2 },
	{ SDLK_WORLD_3,	PBTN_MA3 },
};
#define JOYBTN_PBTN_MAP_SIZE (sizeof(joybtn_pbtn_map) / sizeof(joybtn_pbtn_map[0]))

static int in_sdl_menu_translate(void *drv_data, int keycode, char *charcode)
{
	struct in_sdl_state *state = drv_data;
	const struct menu_keymap *map;
	int map_len;
	int ret = 0;
	int i;

	map = state->joy ? joybtn_pbtn_map : key_pbtn_map;
	map_len = state->joy ? JOYBTN_PBTN_MAP_SIZE : KEY_PBTN_MAP_SIZE;

	if (keycode < 0)
	{
		/* menu -> kc */
		keycode = -keycode;
		for (i = 0; i < map_len; i++)
			if (map[i].pbtn == keycode)
				return map[i].key;
	}
	else
	{
		for (i = 0; i < map_len; i++) {
			if (map[i].key == keycode) {
				ret = map[i].pbtn;
				break;
			}
		}

		if (charcode != NULL && (unsigned int)keycode < SDLK_LAST &&
		    in_sdl_keys[keycode] != NULL && in_sdl_keys[keycode][1] == 0)
		{
			ret |= PBTN_CHAR;
			*charcode = in_sdl_keys[keycode][0];
		}
	}

	return ret;
}

static const in_drv_t in_sdl_drv = {
	.prefix         = IN_SDL_PREFIX,
	.probe          = in_sdl_probe,
	.free           = in_sdl_free,
	.get_key_names  = in_sdl_get_key_names,
	.update         = in_sdl_update,
	.update_keycode = in_sdl_update_keycode,
	.menu_translate = in_sdl_menu_translate,
};

void in_sdl_init(const struct in_default_bind *defbinds,
		 void (*handler)(void *event))
{
	in_register_driver(&in_sdl_drv, defbinds);
	ext_event_handler = handler;
}
Commit	Line	Data
d1dc092f	1	/*
	2	* (C) Gražvydas "notaz" Ignotas, 2012
	3	*
	4	* This work is licensed under the terms of any of these licenses
	5	* (at your option):
	6	* - GNU GPL, version 2 or later.
	7	* - GNU LGPL, version 2.1 or later.
f89d8471	8	* - MAME license.
d1dc092f	9	* See the COPYING file in the top-level directory.
	10	*/
	11
	12	#include <stdio.h>
	13	#include <SDL.h>
	14	#include "input.h"
	15	#include "in_sdl.h"
	16
	17	#define IN_SDL_PREFIX "sdl:"
	18	/* should be machine word for best performace */
	19	typedef unsigned long keybits_t;
	20	#define KEYBITS_WORD_BITS (sizeof(keybits_t) * 8)
	21
6407ad5b	22	struct in_sdl_state {
	23	SDL_Joystick *joy;
	24	int joy_id;
	25	int axis_keydown[2];
	26	keybits_t keystate[SDLK_LAST / KEYBITS_WORD_BITS + 1];
	27	};
	28
9227a777	29	static void (ext_event_handler)(void event);
9227a777	30
d1dc092f	31	static const char * const in_sdl_keys[SDLK_LAST] = {
	32	[SDLK_BACKSPACE] = "backspace",
	33	[SDLK_TAB] = "tab",
	34	[SDLK_CLEAR] = "clear",
	35	[SDLK_RETURN] = "return",
	36	[SDLK_PAUSE] = "pause",
	37	[SDLK_ESCAPE] = "escape",
	38	[SDLK_SPACE] = "space",
	39	[SDLK_EXCLAIM] = "!",
	40	[SDLK_QUOTEDBL] = "\"",
	41	[SDLK_HASH] = "#",
	42	[SDLK_DOLLAR] = "$",
	43	[SDLK_AMPERSAND] = "&",
	44	[SDLK_QUOTE] = "'",
	45	[SDLK_LEFTPAREN] = "(",
	46	[SDLK_RIGHTPAREN] = ")",
	47	[SDLK_ASTERISK] = "*",
	48	[SDLK_PLUS] = "+",
	49	[SDLK_COMMA] = ",",
	50	[SDLK_MINUS] = "-",
	51	[SDLK_PERIOD] = ".",
	52	[SDLK_SLASH] = "/",
	53	[SDLK_0] = "0",
	54	[SDLK_1] = "1",
	55	[SDLK_2] = "2",
	56	[SDLK_3] = "3",
	57	[SDLK_4] = "4",
	58	[SDLK_5] = "5",
	59	[SDLK_6] = "6",
	60	[SDLK_7] = "7",
	61	[SDLK_8] = "8",
	62	[SDLK_9] = "9",
	63	[SDLK_COLON] = ":",
d1f5849c	64	[SDLK_SEMICOLON] = ";",
d1dc092f	65	[SDLK_LESS] = "<",
	66	[SDLK_EQUALS] = "=",
	67	[SDLK_GREATER] = ">",
	68	[SDLK_QUESTION] = "?",
	69	[SDLK_AT] = "@",
	70	[SDLK_LEFTBRACKET] = "[",
	71	[SDLK_BACKSLASH] = "\\",
	72	[SDLK_RIGHTBRACKET] = "]",
	73	[SDLK_CARET] = "^",
	74	[SDLK_UNDERSCORE] = "_",
	75	[SDLK_BACKQUOTE] = "`",
	76	[SDLK_a] = "a",
	77	[SDLK_b] = "b",
	78	[SDLK_c] = "c",
	79	[SDLK_d] = "d",
	80	[SDLK_e] = "e",
	81	[SDLK_f] = "f",
	82	[SDLK_g] = "g",
	83	[SDLK_h] = "h",
	84	[SDLK_i] = "i",
	85	[SDLK_j] = "j",
	86	[SDLK_k] = "k",
	87	[SDLK_l] = "l",
	88	[SDLK_m] = "m",
	89	[SDLK_n] = "n",
	90	[SDLK_o] = "o",
	91	[SDLK_p] = "p",
	92	[SDLK_q] = "q",
	93	[SDLK_r] = "r",
	94	[SDLK_s] = "s",
	95	[SDLK_t] = "t",
	96	[SDLK_u] = "u",
	97	[SDLK_v] = "v",
	98	[SDLK_w] = "w",
	99	[SDLK_x] = "x",
	100	[SDLK_y] = "y",
	101	[SDLK_z] = "z",
	102	[SDLK_DELETE] = "delete",
	103
	104	[SDLK_KP0] = "[0]",
	105	[SDLK_KP1] = "[1]",
	106	[SDLK_KP2] = "[2]",
	107	[SDLK_KP3] = "[3]",
	108	[SDLK_KP4] = "[4]",
	109	[SDLK_KP5] = "[5]",
	110	[SDLK_KP6] = "[6]",
	111	[SDLK_KP7] = "[7]",
	112	[SDLK_KP8] = "[8]",
	113	[SDLK_KP9] = "[9]",
	114	[SDLK_KP_PERIOD] = "[.]",
	115	[SDLK_KP_DIVIDE] = "[/]",
	116	[SDLK_KP_MULTIPLY] = "[*]",
	117	[SDLK_KP_MINUS] = "[-]",
	118	[SDLK_KP_PLUS] = "[+]",
	119	[SDLK_KP_ENTER] = "enter",
	120	[SDLK_KP_EQUALS] = "equals",
	121
	122	[SDLK_UP] = "up",
	123	[SDLK_DOWN] = "down",
	124	[SDLK_RIGHT] = "right",
	125	[SDLK_LEFT] = "left",
d1dc092f	126	[SDLK_INSERT] = "insert",
	127	[SDLK_HOME] = "home",
	128	[SDLK_END] = "end",
	129	[SDLK_PAGEUP] = "page up",
	130	[SDLK_PAGEDOWN] = "page down",
	131
	132	[SDLK_F1] = "f1",
	133	[SDLK_F2] = "f2",
	134	[SDLK_F3] = "f3",
	135	[SDLK_F4] = "f4",
	136	[SDLK_F5] = "f5",
	137	[SDLK_F6] = "f6",
	138	[SDLK_F7] = "f7",
	139	[SDLK_F8] = "f8",
	140	[SDLK_F9] = "f9",
	141	[SDLK_F10] = "f10",
	142	[SDLK_F11] = "f11",
	143	[SDLK_F12] = "f12",
	144	[SDLK_F13] = "f13",
	145	[SDLK_F14] = "f14",
	146	[SDLK_F15] = "f15",
	147
	148	[SDLK_NUMLOCK] = "numlock",
	149	[SDLK_CAPSLOCK] = "caps lock",
	150	[SDLK_SCROLLOCK] = "scroll lock",
	151	[SDLK_RSHIFT] = "right shift",
	152	[SDLK_LSHIFT] = "left shift",
	153	[SDLK_RCTRL] = "right ctrl",
	154	[SDLK_LCTRL] = "left ctrl",
	155	[SDLK_RALT] = "right alt",
	156	[SDLK_LALT] = "left alt",
	157	[SDLK_RMETA] = "right meta",
	158	[SDLK_LMETA] = "left meta",
	159	[SDLK_LSUPER] = "left super", /* "Windows" keys */
	160	[SDLK_RSUPER] = "right super",
	161	[SDLK_MODE] = "alt gr",
	162	[SDLK_COMPOSE] = "compose",
	163	};
	164
	165	static void in_sdl_probe(void)
	166	{
6407ad5b	167	struct in_sdl_state *state;
	168	SDL_Joystick *joy;
	169	int i, joycount;
	170	char name[256];
d1dc092f	171
6407ad5b	172	state = calloc(1, sizeof(*state));
6407ad5b	173	if (state == NULL) {
d1dc092f	174	fprintf(stderr, "in_sdl: OOM\n");
	175	return;
	176	}
	177
6407ad5b	178	in_register(IN_SDL_PREFIX "keys", -1, state, SDLK_LAST,
d1dc092f	179	in_sdl_keys, 0);
6407ad5b	180
	181	/* joysticks go here too */
	182	SDL_InitSubSystem(SDL_INIT_JOYSTICK);
	183
	184	joycount = SDL_NumJoysticks();
	185	for (i = 0; i < joycount; i++) {
	186	joy = SDL_JoystickOpen(i);
	187	if (joy == NULL)
	188	continue;
	189
	190	state = calloc(1, sizeof(*state));
	191	if (state == NULL) {
	192	fprintf(stderr, "in_sdl: OOM\n");
	193	break;
	194	}
	195	state->joy = joy;
	196	state->joy_id = i;
	197
	198	snprintf(name, sizeof(name), IN_SDL_PREFIX "%s", SDL_JoystickName(i));
	199	in_register(name, -1, state, SDLK_LAST, in_sdl_keys, 0);
	200	}
	201
	202	if (joycount > 0)
	203	SDL_JoystickEventState(SDL_ENABLE);
d1dc092f	204	}
	205
	206	static void in_sdl_free(void *drv_data)
	207	{
6407ad5b	208	struct in_sdl_state *state = drv_data;
d1dc092f	209
6407ad5b	210	if (state != NULL) {
	211	if (state->joy != NULL)
	212	SDL_JoystickClose(state->joy);
	213	free(state);
	214	}
d1dc092f	215	}
	216
	217	static const char * const *
	218	in_sdl_get_key_names(int *count)
	219	{
	220	*count = SDLK_LAST;
	221	return in_sdl_keys;
	222	}
	223
	224	/* could use SDL_GetKeyState, but this gives better packing */
	225	static void update_keystate(keybits_t *keystate, int sym, int is_down)
	226	{
	227	keybits_t *ks_word, mask;
	228
	229	mask = 1;
	230	mask <<= sym & (KEYBITS_WORD_BITS - 1);
	231	ks_word = keystate + sym / KEYBITS_WORD_BITS;
	232	if (is_down)
	233	*ks_word \|= mask;
	234	else
	235	*ks_word &= ~mask;
	236	}
	237
6407ad5b	238	static int handle_event(struct in_sdl_state state, SDL_Event event,
6407ad5b	239	int kc_out, int down_out)
d1dc092f	240	{
6407ad5b	241	if (event->type != SDL_KEYDOWN && event->type != SDL_KEYUP)
9227a777	242	return -1;
d1dc092f	243
6407ad5b	244	update_keystate(state->keystate, event->key.keysym.sym,
	245	event->type == SDL_KEYDOWN);
	246	if (kc_out != NULL)
	247	*kc_out = event->key.keysym.sym;
	248	if (down_out != NULL)
	249	*down_out = event->type == SDL_KEYDOWN;
	250
	251	return 1;
	252	}
d1dc092f	253
6407ad5b	254	static int handle_joy_event(struct in_sdl_state state, SDL_Event event,
	255	int kc_out, int down_out)
	256	{
	257	int kc = -1, down = 0, ret = 0;
	258
6407ad5b	259	/* TODO: remaining axis */
	260	switch (event->type) {
	261	case SDL_JOYAXISMOTION:
18306c32 VL	262	if (event->jaxis.which != state->joy_id)
18306c32 VL	263	return -2;
6407ad5b	264	if (event->jaxis.axis > 1)
	265	break;
	266	if (-16384 <= event->jaxis.value && event->jaxis.value <= 16384) {
	267	kc = state->axis_keydown[event->jaxis.axis];
	268	state->axis_keydown[event->jaxis.axis] = 0;
	269	ret = 1;
	270	}
	271	else if (event->jaxis.value < -16384) {
	272	kc = state->axis_keydown[event->jaxis.axis];
	273	if (kc)
	274	update_keystate(state->keystate, kc, 0);
	275	kc = event->jaxis.axis ? SDLK_UP : SDLK_LEFT;
	276	state->axis_keydown[event->jaxis.axis] = kc;
	277	down = 1;
	278	ret = 1;
	279	}
	280	else if (event->jaxis.value > 16384) {
	281	kc = state->axis_keydown[event->jaxis.axis];
	282	if (kc)
	283	update_keystate(state->keystate, kc, 0);
	284	kc = event->jaxis.axis ? SDLK_DOWN : SDLK_RIGHT;
	285	state->axis_keydown[event->jaxis.axis] = kc;
	286	down = 1;
	287	ret = 1;
	288	}
	289	break;
	290
	291	case SDL_JOYBUTTONDOWN:
	292	case SDL_JOYBUTTONUP:
18306c32 VL	293	if (event->jbutton.which != state->joy_id)
18306c32 VL	294	return -2;
6407ad5b	295	kc = (int)event->jbutton.button + SDLK_WORLD_0;
	296	down = event->jbutton.state == SDL_PRESSED;
	297	ret = 1;
	298	break;
9227a777	299	default:
9227a777	300	return -1;
d1dc092f	301	}
d1dc092f	302
6407ad5b	303	if (ret)
	304	update_keystate(state->keystate, kc, down);
	305	if (kc_out != NULL)
	306	*kc_out = kc;
	307	if (down_out != NULL)
	308	*down_out = down;
	309
	310	return ret;
	311	}
	312
	313	#define JOY_EVENTS (SDL_JOYAXISMOTIONMASK \| SDL_JOYBALLMOTIONMASK \| SDL_JOYHATMOTIONMASK \
	314	\| SDL_JOYBUTTONDOWNMASK \| SDL_JOYBUTTONUPMASK)
	315
	316	static int collect_events(struct in_sdl_state state, int one_kc, int *one_down)
	317	{
	318	SDL_Event events[4];
	319	Uint32 mask = state->joy ? JOY_EVENTS : (SDL_ALLEVENTS & ~JOY_EVENTS);
	320	int count, maxcount;
	321	int i, ret, retval = 0;
18306c32 VL	322	int num_events, num_peeped_events;
18306c32 VL	323	SDL_Event *event;
6407ad5b	324
	325	maxcount = (one_kc != NULL) ? 1 : sizeof(events) / sizeof(events[0]);
	326
	327	SDL_PumpEvents();
18306c32 VL	328
	329	num_events = SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, mask);
	330
	331	for (num_peeped_events = 0; num_peeped_events < num_events; num_peeped_events += count) {
6407ad5b	332	count = SDL_PeepEvents(events, maxcount, SDL_GETEVENT, mask);
	333	if (count <= 0)
	334	break;
	335	for (i = 0; i < count; i++) {
18306c32	336	event = &events[i];
6407ad5b	337	if (state->joy)
6407ad5b	338	ret = handle_joy_event(state,
18306c32	339	event, one_kc, one_down);
6407ad5b	340	else
6407ad5b	341	ret = handle_event(state,
18306c32 VL	342	event, one_kc, one_down);
	343	if (ret < 0) {
	344	switch (ret) {
	345	case -2:
	346	SDL_PushEvent(event);
	347	break;
	348	default:
	349	if (ext_event_handler != NULL)
	350	ext_event_handler(event);
	351	break;
	352	}
9227a777	353	continue;
	354	}
	355
6407ad5b	356	retval \|= ret;
6407ad5b	357	if (one_kc != NULL && ret)
18306c32 VL	358	{
	359	// don't lose events other devices might want to handle
	360	for (i++; i < count; i++)
	361	SDL_PushEvent(&events[i]);
6407ad5b	362	goto out;
18306c32	363	}
6407ad5b	364	}
	365	}
	366
	367	out:
	368	return retval;
	369	}
	370
	371	static int in_sdl_update(void drv_data, const int binds, int *result)
	372	{
	373	struct in_sdl_state *state = drv_data;
	374	keybits_t mask;
	375	int i, sym, bit, b;
	376
	377	collect_events(state, NULL, NULL);
	378
d1dc092f	379	for (i = 0; i < SDLK_LAST / KEYBITS_WORD_BITS + 1; i++) {
6407ad5b	380	mask = state->keystate[i];
d1dc092f	381	if (mask == 0)
	382	continue;
	383	for (bit = 0; mask != 0; bit++, mask >>= 1) {
	384	if ((mask & 1) == 0)
	385	continue;
	386	sym = i * KEYBITS_WORD_BITS + bit;
	387
	388	for (b = 0; b < IN_BINDTYPE_COUNT; b++)
	389	result[b] \|= binds[IN_BIND_OFFS(sym, b)];
	390	}
	391	}
	392
	393	return 0;
	394	}
	395
	396	static int in_sdl_update_keycode(void drv_data, int is_down)
	397	{
6407ad5b	398	struct in_sdl_state *state = drv_data;
	399	int ret_kc = -1, ret_down = 0;
	400
	401	collect_events(state, &ret_kc, &ret_down);
	402
d1dc092f	403	if (is_down != NULL)
	404	*is_down = ret_down;
	405
	406	return ret_kc;
	407	}
	408
6407ad5b	409	struct menu_keymap {
d1dc092f	410	short key;
d1dc092f	411	short pbtn;
6407ad5b	412	};
	413
	414	static const struct menu_keymap key_pbtn_map[] =
d1dc092f	415	{
	416	{ SDLK_UP, PBTN_UP },
	417	{ SDLK_DOWN, PBTN_DOWN },
	418	{ SDLK_LEFT, PBTN_LEFT },
	419	{ SDLK_RIGHT, PBTN_RIGHT },
	420	/* XXX: maybe better set this from it's plat code somehow */
	421	{ SDLK_RETURN, PBTN_MOK },
	422	{ SDLK_ESCAPE, PBTN_MBACK },
d1f5849c	423	{ SDLK_SEMICOLON, PBTN_MA2 },
d1f5849c	424	{ SDLK_QUOTE, PBTN_MA3 },
d1dc092f	425	{ SDLK_BACKSLASH, PBTN_MENU },
	426	{ SDLK_LEFTBRACKET, PBTN_L },
	427	{ SDLK_RIGHTBRACKET, PBTN_R },
	428	};
d1dc092f	429	#define KEY_PBTN_MAP_SIZE (sizeof(key_pbtn_map) / sizeof(key_pbtn_map[0]))
d1dc092f	430
6407ad5b	431	static const struct menu_keymap joybtn_pbtn_map[] =
	432	{
	433	{ SDLK_UP, PBTN_UP },
	434	{ SDLK_DOWN, PBTN_DOWN },
	435	{ SDLK_LEFT, PBTN_LEFT },
	436	{ SDLK_RIGHT, PBTN_RIGHT },
	437	/* joystick */
	438	{ SDLK_WORLD_0, PBTN_MOK },
	439	{ SDLK_WORLD_1, PBTN_MBACK },
	440	{ SDLK_WORLD_2, PBTN_MA2 },
	441	{ SDLK_WORLD_3, PBTN_MA3 },
	442	};
	443	#define JOYBTN_PBTN_MAP_SIZE (sizeof(joybtn_pbtn_map) / sizeof(joybtn_pbtn_map[0]))
	444
d1dc092f	445	static int in_sdl_menu_translate(void drv_data, int keycode, char charcode)
d1dc092f	446	{
6407ad5b	447	struct in_sdl_state *state = drv_data;
	448	const struct menu_keymap *map;
	449	int map_len;
d1dc092f	450	int ret = 0;
	451	int i;
	452
6407ad5b	453	map = state->joy ? joybtn_pbtn_map : key_pbtn_map;
	454	map_len = state->joy ? JOYBTN_PBTN_MAP_SIZE : KEY_PBTN_MAP_SIZE;
	455
d1dc092f	456	if (keycode < 0)
	457	{
	458	/* menu -> kc */
	459	keycode = -keycode;
6407ad5b	460	for (i = 0; i < map_len; i++)
	461	if (map[i].pbtn == keycode)
	462	return map[i].key;
d1dc092f	463	}
	464	else
	465	{
6407ad5b	466	for (i = 0; i < map_len; i++) {
	467	if (map[i].key == keycode) {
	468	ret = map[i].pbtn;
d1dc092f	469	break;
	470	}
	471	}
	472
	473	if (charcode != NULL && (unsigned int)keycode < SDLK_LAST &&
	474	in_sdl_keys[keycode] != NULL && in_sdl_keys[keycode][1] == 0)
	475	{
	476	ret \|= PBTN_CHAR;
	477	*charcode = in_sdl_keys[keycode][0];
	478	}
	479	}
	480
	481	return ret;
	482	}
	483
	484	static const in_drv_t in_sdl_drv = {
	485	.prefix = IN_SDL_PREFIX,
	486	.probe = in_sdl_probe,
	487	.free = in_sdl_free,
	488	.get_key_names = in_sdl_get_key_names,
	489	.update = in_sdl_update,
	490	.update_keycode = in_sdl_update_keycode,
	491	.menu_translate = in_sdl_menu_translate,
	492	};
	493
9227a777	494	void in_sdl_init(const struct in_default_bind *defbinds,
9227a777	495	void (handler)(void event))
d1dc092f	496	{
d1dc092f	497	in_register_driver(&in_sdl_drv, defbinds);
9227a777	498	ext_event_handler = handler;
d1dc092f	499	}