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RetroArch/input/sdl_input.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "../driver.h"
#include "SDL.h"
#include "../gfx/gfx_context.h"
#include <boolean.h>
#include "../general.h"
#include <stdint.h>
#include <stdlib.h>
#include "../libretro.h"
#include "input_autodetect.h"
#include "input_common.h"
#include "input_keymaps.h"
#include "keyboard_line.h"
typedef struct sdl_input
{
const rarch_joypad_driver_t *joypad;
int mouse_x, mouse_y;
int mouse_abs_x, mouse_abs_y;
int mouse_l, mouse_r, mouse_m, mouse_wu, mouse_wd, mouse_wl, mouse_wr;
} sdl_input_t;
static void *sdl_input_init(void)
{
input_init_keyboard_lut(rarch_key_map_sdl);
sdl_input_t *sdl = (sdl_input_t*)calloc(1, sizeof(*sdl));
if (!sdl)
return NULL;
sdl->joypad = input_joypad_init_driver(g_settings.input.joypad_driver);
RARCH_LOG("[SDL]: Input driver initialized.\n");
return sdl;
}
static bool sdl_key_pressed(int key)
{
if (key >= RETROK_LAST)
return false;
unsigned sym = input_translate_rk_to_keysym((enum retro_key)key);
int num_keys;
const uint8_t *keymap;
#if HAVE_SDL2
sym = SDL_GetScancodeFromKey(sym);
keymap = SDL_GetKeyboardState(&num_keys);
#else
keymap = SDL_GetKeyState(&num_keys);
#endif
if (sym < 0 || sym >= num_keys)
return false;
return keymap[sym];
}
static bool sdl_is_pressed(sdl_input_t *sdl, unsigned port_num, const struct retro_keybind *binds, unsigned key)
{
if (sdl_key_pressed(binds[key].key))
return true;
return input_joypad_pressed(sdl->joypad, port_num, binds, key);
}
static int16_t sdl_analog_pressed(sdl_input_t *sdl, const struct retro_keybind *binds,
unsigned idx, unsigned id)
{
unsigned id_minus = 0;
unsigned id_plus = 0;
input_conv_analog_id_to_bind_id(idx, id, &id_minus, &id_plus);
int16_t pressed_minus = sdl_key_pressed(binds[id_minus].key) ? -0x7fff : 0;
int16_t pressed_plus = sdl_key_pressed(binds[id_plus].key) ? 0x7fff : 0;
return pressed_plus + pressed_minus;
}
static bool sdl_bind_button_pressed(void *data, int key)
{
const struct retro_keybind *binds = g_settings.input.binds[0];
if (key >= 0 && key < RARCH_BIND_LIST_END)
return sdl_is_pressed((sdl_input_t*)data, 0, binds, key);
return false;
}
static int16_t sdl_joypad_device_state(sdl_input_t *sdl, const struct retro_keybind **binds_,
unsigned port_num, unsigned id)
{
const struct retro_keybind *binds = binds_[port_num];
if (id < RARCH_BIND_LIST_END)
return binds[id].valid && sdl_is_pressed(sdl, port_num, binds, id);
return 0;
}
static int16_t sdl_analog_device_state(sdl_input_t *sdl, const struct retro_keybind **binds,
unsigned port_num, unsigned idx, unsigned id)
{
int16_t ret = sdl_analog_pressed(sdl, binds[port_num], idx, id);
if (!ret)
ret = input_joypad_analog(sdl->joypad, port_num, idx, id, binds[port_num]);
return ret;
}
static int16_t sdl_keyboard_device_state(sdl_input_t *sdl, unsigned id)
{
return sdl_key_pressed(id);
}
static int16_t sdl_mouse_device_state(sdl_input_t *sdl, unsigned id)
{
switch (id)
{
case RETRO_DEVICE_ID_MOUSE_LEFT:
return sdl->mouse_l;
case RETRO_DEVICE_ID_MOUSE_RIGHT:
return sdl->mouse_r;
case RETRO_DEVICE_ID_MOUSE_WHEELUP:
return sdl->mouse_wu;
case RETRO_DEVICE_ID_MOUSE_WHEELDOWN:
return sdl->mouse_wd;
case RETRO_DEVICE_ID_MOUSE_X:
return sdl->mouse_x;
case RETRO_DEVICE_ID_MOUSE_Y:
return sdl->mouse_y;
case RETRO_DEVICE_ID_MOUSE_MIDDLE:
return sdl->mouse_m;
default:
return 0;
}
}
static int16_t sdl_pointer_device_state(sdl_input_t *sdl,
unsigned idx, unsigned id, bool screen)
{
if (idx != 0)
return 0;
int16_t res_x = 0, res_y = 0, res_screen_x = 0, res_screen_y = 0;
bool valid = input_translate_coord_viewport(sdl->mouse_abs_x, sdl->mouse_abs_y,
&res_x, &res_y, &res_screen_x, &res_screen_y);
if (!valid)
return 0;
if (screen)
{
res_x = res_screen_x;
res_y = res_screen_y;
}
bool inside = (res_x >= -0x7fff) && (res_y >= -0x7fff);
if (!inside)
return 0;
switch (id)
{
case RETRO_DEVICE_ID_POINTER_X:
return res_x;
case RETRO_DEVICE_ID_POINTER_Y:
return res_y;
case RETRO_DEVICE_ID_POINTER_PRESSED:
return sdl->mouse_l;
default:
return 0;
}
}
static int16_t sdl_lightgun_device_state(sdl_input_t *sdl, unsigned id)
{
switch (id)
{
case RETRO_DEVICE_ID_LIGHTGUN_X:
return sdl->mouse_x;
case RETRO_DEVICE_ID_LIGHTGUN_Y:
return sdl->mouse_y;
case RETRO_DEVICE_ID_LIGHTGUN_TRIGGER:
return sdl->mouse_l;
case RETRO_DEVICE_ID_LIGHTGUN_CURSOR:
return sdl->mouse_m;
case RETRO_DEVICE_ID_LIGHTGUN_TURBO:
return sdl->mouse_r;
case RETRO_DEVICE_ID_LIGHTGUN_START:
return sdl->mouse_m && sdl->mouse_r;
case RETRO_DEVICE_ID_LIGHTGUN_PAUSE:
return sdl->mouse_m && sdl->mouse_l;
default:
return 0;
}
}
static int16_t sdl_input_state(void *data_, const struct retro_keybind **binds,
unsigned port, unsigned device, unsigned idx, unsigned id)
{
sdl_input_t *data = (sdl_input_t*)data_;
switch (device)
{
case RETRO_DEVICE_JOYPAD:
return sdl_joypad_device_state(data, binds, port, id);
case RETRO_DEVICE_ANALOG:
return sdl_analog_device_state(data, binds, port, idx, id);
case RETRO_DEVICE_MOUSE:
return sdl_mouse_device_state(data, id);
case RETRO_DEVICE_POINTER:
case RARCH_DEVICE_POINTER_SCREEN:
return sdl_pointer_device_state(data, idx, id, device == RARCH_DEVICE_POINTER_SCREEN);
case RETRO_DEVICE_KEYBOARD:
return sdl_keyboard_device_state(data, id);
case RETRO_DEVICE_LIGHTGUN:
return sdl_lightgun_device_state(data, id);
}
return 0;
}
static void sdl_input_free(void *data)
{
if (!data)
return;
// Flush out all pending events.
#ifdef HAVE_SDL2
SDL_FlushEvents(SDL_FIRSTEVENT, SDL_LASTEVENT);
#else
SDL_Event event;
while (SDL_PollEvent(&event));
#endif
sdl_input_t *sdl = (sdl_input_t*)data;
if (sdl->joypad)
sdl->joypad->destroy();
free(data);
}
#ifdef HAVE_SDL2
static void sdl_grab_mouse(void *data, bool state)
{
sdl_input_t *sdl = (sdl_input_t*)data;
if (driver.video == &video_sdl2)
{
/* first member of sdl2_video_t is the window */
struct temp{
SDL_Window *w;
};
SDL_SetWindowGrab(((struct temp*)driver.video_data)->w,
state ? SDL_TRUE : SDL_FALSE);
}
}
#endif
static bool sdl_set_rumble(void *data, unsigned port,
enum retro_rumble_effect effect, uint16_t strength)
{
sdl_input_t *sdl = (sdl_input_t*)data;
return input_joypad_set_rumble(sdl->joypad, port, effect, strength);
}
static const rarch_joypad_driver_t *sdl_get_joypad_driver(void *data)
{
sdl_input_t *sdl = (sdl_input_t*)data;
return sdl->joypad;
}
static void sdl_poll_mouse(sdl_input_t *sdl)
{
Uint8 btn = SDL_GetRelativeMouseState(&sdl->mouse_x, &sdl->mouse_y);
SDL_GetMouseState(&sdl->mouse_abs_x, &sdl->mouse_abs_y);
sdl->mouse_l = SDL_BUTTON(SDL_BUTTON_LEFT) & btn ? 1 : 0;
sdl->mouse_r = SDL_BUTTON(SDL_BUTTON_RIGHT) & btn ? 1 : 0;
sdl->mouse_m = SDL_BUTTON(SDL_BUTTON_MIDDLE) & btn ? 1 : 0;
#ifndef HAVE_SDL2
sdl->mouse_wu = SDL_BUTTON(SDL_BUTTON_WHEELUP) & btn ? 1 : 0;
sdl->mouse_wd = SDL_BUTTON(SDL_BUTTON_WHEELDOWN) & btn ? 1 : 0;
#endif
}
static void sdl_input_poll(void *data)
{
SDL_PumpEvents();
sdl_input_t *sdl = (sdl_input_t*)data;
if (sdl->joypad)
sdl->joypad->poll();
sdl_poll_mouse(sdl);
SDL_Event event;
#ifdef HAVE_SDL2
while (SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_KEYDOWN, SDL_MOUSEWHEEL) > 0)
#else
while (SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_KEYEVENTMASK) > 0)
#endif
{
if (event.type == SDL_KEYDOWN || event.type == SDL_KEYUP)
{
uint16_t mod = 0;
unsigned code = input_translate_keysym_to_rk(event.key.keysym.sym);
if (event.key.keysym.mod & KMOD_SHIFT)
mod |= RETROKMOD_SHIFT;
if (event.key.keysym.mod & KMOD_CTRL)
mod |= RETROKMOD_CTRL;
if (event.key.keysym.mod & KMOD_ALT)
mod |= RETROKMOD_ALT;
if (event.key.keysym.mod & KMOD_NUM)
mod |= RETROKMOD_NUMLOCK;
if (event.key.keysym.mod & KMOD_CAPS)
mod |= RETROKMOD_CAPSLOCK;
input_keyboard_event(event.type == SDL_KEYDOWN, code, code, mod);
}
#ifdef HAVE_SDL2
else if (event.type == SDL_MOUSEWHEEL)
{
sdl->mouse_wu = event.wheel.y < 0;
sdl->mouse_wd = event.wheel.y > 0;
sdl->mouse_wl = event.wheel.x < 0;
sdl->mouse_wr = event.wheel.x > 0;
break;
}
#endif
}
}
static uint64_t sdl_get_capabilities(void *data)
{
uint64_t caps = 0;
caps |= (1 << RETRO_DEVICE_JOYPAD);
caps |= (1 << RETRO_DEVICE_MOUSE);
caps |= (1 << RETRO_DEVICE_KEYBOARD);
caps |= (1 << RETRO_DEVICE_LIGHTGUN);
caps |= (1 << RETRO_DEVICE_POINTER);
caps |= (1 << RETRO_DEVICE_ANALOG);
return caps;
}
input_driver_t input_sdl = {
sdl_input_init,
sdl_input_poll,
sdl_input_state,
sdl_bind_button_pressed,
sdl_input_free,
NULL,
NULL,
sdl_get_capabilities,
#ifdef HAVE_SDL2
"sdl2",
sdl_grab_mouse,
#else
"sdl",
NULL,
#endif
sdl_set_rumble,
sdl_get_joypad_driver,
};
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