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RetroArch/input/drivers/sdl_input.c
libretroadmin 963bb92f95 (Input) Style nits/code simplifications
2023-02-19 06:30:14 +01:00

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2017 - Daniel De Matteis
* Copyright (C) 2014-2015 - Higor Euripedes
*
* 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 <stdint.h>
#include <stdlib.h>
#include <boolean.h>
#include <string/stdstring.h>
#include <libretro.h>
#include "SDL.h"
#include "../input_keymaps.h"
#include "../../configuration.h"
#include "../../retroarch.h"
#include "../../tasks/tasks_internal.h"
#ifdef HAVE_SDL2
#include "../../gfx/common/sdl2_common.h"
#endif
#ifdef WEBOS
#include <SDL_webOS.h>
#include <dlfcn.h>
#endif
/* TODO/FIXME -
* fix game focus toggle */
typedef struct sdl_input
{
int mouse_x;
int mouse_y;
int mouse_abs_x;
int mouse_abs_y;
int mouse_l;
int mouse_r;
int mouse_m;
int mouse_b4;
int mouse_b5;
int mouse_wu;
int mouse_wd;
int mouse_wl;
int mouse_wr;
} sdl_input_t;
#ifdef WEBOS
enum sdl_webos_special_key
{
sdl_webos_spkey_back,
sdl_webos_spkey_size,
};
static uint8_t sdl_webos_special_keymap[sdl_webos_spkey_size] = {0};
#endif
static void *sdl_input_init(const char *joypad_driver)
{
sdl_input_t *sdl = (sdl_input_t*)calloc(1, sizeof(*sdl));
if (!sdl)
return NULL;
input_keymaps_init_keyboard_lut(rarch_key_map_sdl);
return sdl;
}
static bool sdl_key_pressed(int key)
{
int num_keys;
#ifdef HAVE_SDL2
const uint8_t *keymap = SDL_GetKeyboardState(&num_keys);
unsigned sym = SDL_GetScancodeFromKey(rarch_keysym_lut[(enum retro_key)key]);
#else
const uint8_t *keymap = SDL_GetKeyState(&num_keys);
unsigned sym = rarch_keysym_lut[(enum retro_key)key];
#endif
#ifdef WEBOS
if ( (key == RETROK_BACKSPACE )
&& sdl_webos_special_keymap[sdl_webos_spkey_back])
{
/* Reset to unpressed state */
sdl_webos_special_keymap[sdl_webos_spkey_back] = 0;
return true;
}
if (key == RETROK_F1 && keymap[SDL_WEBOS_SCANCODE_EXIT])
return true;
if (key == RETROK_x && keymap[SDL_WEBOS_SCANCODE_RED])
return true;
if (key == RETROK_z && keymap[SDL_WEBOS_SCANCODE_GREEN])
return true;
if (key == RETROK_s && keymap[SDL_WEBOS_SCANCODE_YELLOW])
return true;
if (key == RETROK_a && keymap[SDL_WEBOS_SCANCODE_BLUE])
return true;
#endif
if (sym >= (unsigned)num_keys)
return false;
return keymap[sym];
}
static int16_t sdl_input_state(
void *data,
const input_device_driver_t *joypad,
const input_device_driver_t *sec_joypad,
rarch_joypad_info_t *joypad_info,
const retro_keybind_set *binds,
bool keyboard_mapping_blocked,
unsigned port,
unsigned device,
unsigned idx,
unsigned id)
{
int16_t ret = 0;
sdl_input_t *sdl = (sdl_input_t*)data;
switch (device)
{
case RETRO_DEVICE_JOYPAD:
if (id == RETRO_DEVICE_ID_JOYPAD_MASK)
{
unsigned i;
for (i = 0; i < RARCH_FIRST_CUSTOM_BIND; i++)
{
if (binds[port][i].valid)
if (sdl_key_pressed(binds[port][i].key))
ret |= (1 << i);
}
return ret;
}
if (id < RARCH_BIND_LIST_END)
{
if (binds[port][id].valid)
if (sdl_key_pressed(binds[port][id].key))
return 1;
}
break;
case RETRO_DEVICE_ANALOG:
{
int id_minus_key = 0;
int id_plus_key = 0;
unsigned id_minus = 0;
unsigned id_plus = 0;
bool id_plus_valid = false;
bool id_minus_valid = false;
input_conv_analog_id_to_bind_id(idx, id, id_minus, id_plus);
id_minus_valid = binds[port][id_minus].valid;
id_plus_valid = binds[port][id_plus].valid;
id_minus_key = binds[port][id_minus].key;
id_plus_key = binds[port][id_plus].key;
if (id_plus_valid && id_plus_key < RETROK_LAST)
{
if (sdl_key_pressed(id_plus_key))
ret = 0x7fff;
}
if (id_minus_valid && id_minus_key < RETROK_LAST)
{
if (sdl_key_pressed(id_minus_key))
ret += -0x7fff;
}
}
return ret;
case RETRO_DEVICE_MOUSE:
case RARCH_DEVICE_MOUSE_SCREEN:
if (config_get_ptr()->uints.input_mouse_index[ port ] == 0)
{
switch (id)
{
case RETRO_DEVICE_ID_MOUSE_LEFT:
return sdl->mouse_l;
case RETRO_DEVICE_ID_MOUSE_RIGHT:
return sdl->mouse_r;
#ifdef WEBOS
case RETRO_DEVICE_ID_MOUSE_WHEELUP:
/* Note: webOS wheel is reversed */
if (sdl->mouse_wd != 0)
{
sdl->mouse_wd = 0;
return 1;
}
break;
case RETRO_DEVICE_ID_MOUSE_WHEELDOWN:
if (sdl->mouse_wu != 0)
{
sdl->mouse_wu = 0;
return 1;
}
break;
case RETRO_DEVICE_ID_MOUSE_X:
return sdl->mouse_abs_x;
case RETRO_DEVICE_ID_MOUSE_Y:
return sdl->mouse_abs_y;
#else
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;
#endif
case RETRO_DEVICE_ID_MOUSE_MIDDLE:
return sdl->mouse_m;
case RETRO_DEVICE_ID_MOUSE_BUTTON_4:
return sdl->mouse_b4;
case RETRO_DEVICE_ID_MOUSE_BUTTON_5:
return sdl->mouse_b5;
}
}
break;
case RETRO_DEVICE_POINTER:
case RARCH_DEVICE_POINTER_SCREEN:
if (idx == 0)
{
struct video_viewport vp;
bool screen = device ==
RARCH_DEVICE_POINTER_SCREEN;
const int edge_detect = 32700;
bool inside = false;
int16_t res_x = 0;
int16_t res_y = 0;
int16_t res_screen_x = 0;
int16_t res_screen_y = 0;
vp.x = 0;
vp.y = 0;
vp.width = 0;
vp.height = 0;
vp.full_width = 0;
vp.full_height = 0;
if (video_driver_translate_coord_viewport_wrap(
&vp, sdl->mouse_abs_x, sdl->mouse_abs_y,
&res_x, &res_y, &res_screen_x, &res_screen_y))
{
if (screen)
{
res_x = res_screen_x;
res_y = res_screen_y;
}
inside = (res_x >= -edge_detect)
&& (res_y >= -edge_detect)
&& (res_x <= edge_detect)
&& (res_y <= edge_detect);
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;
case RETRO_DEVICE_ID_LIGHTGUN_IS_OFFSCREEN:
return !inside;
}
}
}
break;
case RETRO_DEVICE_KEYBOARD:
return (id < RETROK_LAST) && sdl_key_pressed(id);
case RETRO_DEVICE_LIGHTGUN:
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;
}
break;
}
return 0;
}
static void sdl_input_free(void *data)
{
#ifndef HAVE_SDL2
SDL_Event event;
#endif
sdl_input_t *sdl = (sdl_input_t*)data;
if (!data)
return;
/* Flush out all pending events. */
#ifdef HAVE_SDL2
SDL_FlushEvents(SDL_FIRSTEVENT, SDL_LASTEVENT);
#else
while (SDL_PollEvent(&event));
#endif
free(data);
}
#ifdef HAVE_SDL2
static void sdl2_grab_mouse(void *data, bool state)
{
sdl2_video_t *video_ptr = NULL;
if (string_is_not_equal(video_driver_get_ident(), "sdl2"))
return;
video_ptr = (sdl2_video_t*)video_driver_get_ptr();
if (video_ptr)
SDL_SetWindowGrab(video_ptr->window, state ? SDL_TRUE : SDL_FALSE);
}
#endif
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;
sdl->mouse_b4 = (SDL_BUTTON(SDL_BUTTON_X1) & btn) ? 1 : 0;
sdl->mouse_b5 = (SDL_BUTTON(SDL_BUTTON_X2) & 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_Event event;
sdl_input_t *sdl = (sdl_input_t*)data;
SDL_PumpEvents();
sdl_poll_mouse(sdl);
#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_keymaps_translate_keysym_to_rk(
event.key.keysym.sym);
#ifdef WEBOS
switch ((int) event.key.keysym.scancode)
{
case SDL_WEBOS_SCANCODE_BACK:
/* Because webOS is sending DOWN/UP at the same time,
we save this flag for later */
sdl_webos_special_keymap[sdl_webos_spkey_back] |= event.type == SDL_KEYDOWN;
code = RETROK_BACKSPACE;
break;
case SDL_WEBOS_SCANCODE_RED:
code = RETROK_x;
break;
case SDL_WEBOS_SCANCODE_GREEN:
code = RETROK_z;
break;
case SDL_WEBOS_SCANCODE_YELLOW:
code = RETROK_s;
break;
case SDL_WEBOS_SCANCODE_BLUE:
code = RETROK_a;
break;
case SDL_WEBOS_SCANCODE_EXIT:
code = RETROK_F1;
break;
default:
break;
}
/* Disable cursor when using the buttons */
if (code && code != RETROK_RETURN)
SDL_webOSCursorVisibility(0);
#endif
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,
RETRO_DEVICE_KEYBOARD);
}
#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)
{
return
(1 << RETRO_DEVICE_JOYPAD)
| (1 << RETRO_DEVICE_MOUSE)
| (1 << RETRO_DEVICE_KEYBOARD)
| (1 << RETRO_DEVICE_LIGHTGUN)
| (1 << RETRO_DEVICE_POINTER)
| (1 << RETRO_DEVICE_ANALOG);
}
input_driver_t input_sdl = {
sdl_input_init,
sdl_input_poll,
sdl_input_state,
sdl_input_free,
NULL,
NULL,
sdl_get_capabilities,
#ifdef HAVE_SDL2
"sdl2",
sdl2_grab_mouse,
#else
"sdl",
NULL, /* grab_mouse */
#endif
NULL,
NULL
};
#ifdef WEBOS
SDL_bool SDL_webOSCursorVisibility(SDL_bool visible)
{
static SDL_bool (*fn)(SDL_bool visible) = NULL;
static bool dlsym_called = false;
if (!dlsym_called)
{
fn = dlsym(RTLD_NEXT, "SDL_webOSCursorVisibility");
dlsym_called = true;
}
if (!fn)
{
SDL_ShowCursor(SDL_DISABLE);
SDL_ShowCursor(SDL_ENABLE);
return SDL_TRUE;
}
return fn(visible);
}
#endif
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