mirror of
https://github.com/libretro/RetroArch.git
synced 2024-10-07 22:33:27 +00:00
492 lines
13 KiB
C
492 lines
13 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "../driver.h"
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#include "../gfx/gfx_context.h"
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#include "../boolean.h"
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#include "../general.h"
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#include <stdint.h>
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#include <stdlib.h>
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#include "../libretro.h"
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#include "rarch_sdl_input.h"
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struct key_bind
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{
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unsigned sdl;
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enum retro_key sk;
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};
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static unsigned keysym_lut[RETROK_LAST];
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static const struct key_bind lut_binds[] = {
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{ SDLK_LEFT, RETROK_LEFT },
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{ SDLK_RIGHT, RETROK_RIGHT },
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{ SDLK_UP, RETROK_UP },
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{ SDLK_DOWN, RETROK_DOWN },
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{ SDLK_RETURN, RETROK_RETURN },
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{ SDLK_TAB, RETROK_TAB },
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{ SDLK_INSERT, RETROK_INSERT },
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{ SDLK_DELETE, RETROK_DELETE },
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{ SDLK_RSHIFT, RETROK_RSHIFT },
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{ SDLK_LSHIFT, RETROK_LSHIFT },
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{ SDLK_LCTRL, RETROK_LCTRL },
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{ SDLK_END, RETROK_END },
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{ SDLK_HOME, RETROK_HOME },
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{ SDLK_PAGEDOWN, RETROK_PAGEDOWN },
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{ SDLK_PAGEUP, RETROK_PAGEUP },
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{ SDLK_LALT, RETROK_LALT },
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{ SDLK_SPACE, RETROK_SPACE },
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{ SDLK_ESCAPE, RETROK_ESCAPE },
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{ SDLK_BACKSPACE, RETROK_BACKSPACE },
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{ SDLK_KP_ENTER, RETROK_KP_ENTER },
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{ SDLK_KP_PLUS, RETROK_KP_PLUS },
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{ SDLK_KP_MINUS, RETROK_KP_MINUS },
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{ SDLK_KP_MULTIPLY, RETROK_KP_MULTIPLY },
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{ SDLK_KP_DIVIDE, RETROK_KP_DIVIDE },
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{ SDLK_BACKQUOTE, RETROK_BACKQUOTE },
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{ SDLK_PAUSE, RETROK_PAUSE },
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{ SDLK_KP0, RETROK_KP0 },
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{ SDLK_KP1, RETROK_KP1 },
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{ SDLK_KP2, RETROK_KP2 },
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{ SDLK_KP3, RETROK_KP3 },
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{ SDLK_KP4, RETROK_KP4 },
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{ SDLK_KP5, RETROK_KP5 },
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{ SDLK_KP6, RETROK_KP6 },
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{ SDLK_KP7, RETROK_KP7 },
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{ SDLK_KP8, RETROK_KP8 },
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{ SDLK_KP9, RETROK_KP9 },
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{ SDLK_0, RETROK_0 },
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{ SDLK_1, RETROK_1 },
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{ SDLK_2, RETROK_2 },
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{ SDLK_3, RETROK_3 },
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{ SDLK_4, RETROK_4 },
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{ SDLK_5, RETROK_5 },
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{ SDLK_6, RETROK_6 },
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{ SDLK_7, RETROK_7 },
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{ SDLK_8, RETROK_8 },
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{ SDLK_9, RETROK_9 },
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{ SDLK_F1, RETROK_F1 },
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{ SDLK_F2, RETROK_F2 },
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{ SDLK_F3, RETROK_F3 },
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{ SDLK_F4, RETROK_F4 },
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{ SDLK_F5, RETROK_F5 },
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{ SDLK_F6, RETROK_F6 },
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{ SDLK_F7, RETROK_F7 },
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{ SDLK_F8, RETROK_F8 },
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{ SDLK_F9, RETROK_F9 },
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{ SDLK_F10, RETROK_F10 },
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{ SDLK_F11, RETROK_F11 },
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{ SDLK_F12, RETROK_F12 },
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{ SDLK_a, RETROK_a },
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{ SDLK_b, RETROK_b },
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{ SDLK_c, RETROK_c },
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{ SDLK_d, RETROK_d },
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{ SDLK_e, RETROK_e },
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{ SDLK_f, RETROK_f },
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{ SDLK_g, RETROK_g },
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{ SDLK_h, RETROK_h },
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{ SDLK_i, RETROK_i },
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{ SDLK_j, RETROK_j },
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{ SDLK_k, RETROK_k },
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{ SDLK_l, RETROK_l },
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{ SDLK_m, RETROK_m },
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{ SDLK_n, RETROK_n },
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{ SDLK_o, RETROK_o },
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{ SDLK_p, RETROK_p },
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{ SDLK_q, RETROK_q },
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{ SDLK_r, RETROK_r },
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{ SDLK_s, RETROK_s },
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{ SDLK_t, RETROK_t },
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{ SDLK_u, RETROK_u },
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{ SDLK_v, RETROK_v },
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{ SDLK_w, RETROK_w },
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{ SDLK_x, RETROK_x },
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{ SDLK_y, RETROK_y },
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{ SDLK_z, RETROK_z },
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};
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static void init_lut(void)
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{
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memset(keysym_lut, 0, sizeof(keysym_lut));
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for (unsigned i = 0; i < sizeof(lut_binds) / sizeof(lut_binds[0]); i++)
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keysym_lut[lut_binds[i].sk] = lut_binds[i].sdl;
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}
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static void *sdl_input_init(void)
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{
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init_lut();
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sdl_input_t *sdl = (sdl_input_t*)calloc(1, sizeof(*sdl));
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if (!sdl)
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return NULL;
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#ifdef HAVE_DINPUT
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sdl->di = sdl_dinput_init();
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if (!sdl->di)
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{
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free(sdl);
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RARCH_ERR("Failed to init SDL/DInput.\n");
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return NULL;
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}
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#else
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if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
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return NULL;
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SDL_JoystickEventState(SDL_IGNORE);
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sdl->num_joysticks = SDL_NumJoysticks();
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for (unsigned i = 0; i < MAX_PLAYERS; i++)
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{
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if (g_settings.input.joypad_map[i] < 0)
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continue;
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unsigned port = g_settings.input.joypad_map[i];
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if (sdl->num_joysticks <= port)
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continue;
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sdl->joysticks[i] = SDL_JoystickOpen(port);
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if (!sdl->joysticks[i])
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{
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RARCH_ERR("Couldn't open SDL joystick #%u on SNES port %u\n", port, i + 1);
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free(sdl);
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SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
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return NULL;
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}
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RARCH_LOG("Opened Joystick: %s (#%u) on port %u\n",
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SDL_JoystickName(port), port, i + 1);
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sdl->num_axes[i] = SDL_JoystickNumAxes(sdl->joysticks[i]);
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sdl->num_buttons[i] = SDL_JoystickNumButtons(sdl->joysticks[i]);
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sdl->num_hats[i] = SDL_JoystickNumHats(sdl->joysticks[i]);
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RARCH_LOG("Joypad has: %u axes, %u buttons, %u hats.\n",
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sdl->num_axes[i], sdl->num_buttons[i], sdl->num_hats[i]);
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}
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#endif
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sdl->use_keyboard = true;
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return sdl;
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}
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static bool sdl_key_pressed(int key)
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{
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return key < RETROK_LAST && gfx_ctx_key_pressed(keysym_lut[key]);
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}
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#ifndef HAVE_DINPUT
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static bool sdl_joykey_pressed(sdl_input_t *sdl, int port_num, uint16_t joykey)
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{
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if (joykey == NO_BTN)
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return false;
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// Check hat.
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if (GET_HAT_DIR(joykey))
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{
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uint16_t hat = GET_HAT(joykey);
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if (hat >= sdl->num_hats[port_num])
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return false;
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Uint8 dir = SDL_JoystickGetHat(sdl->joysticks[port_num], hat);
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switch (GET_HAT_DIR(joykey))
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{
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case HAT_UP_MASK:
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return dir & SDL_HAT_UP;
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case HAT_DOWN_MASK:
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return dir & SDL_HAT_DOWN;
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case HAT_LEFT_MASK:
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return dir & SDL_HAT_LEFT;
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case HAT_RIGHT_MASK:
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return dir & SDL_HAT_RIGHT;
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default:
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return false;
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}
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}
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else // Check the button
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{
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if (joykey < sdl->num_buttons[port_num] && SDL_JoystickGetButton(sdl->joysticks[port_num], joykey))
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return true;
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return false;
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}
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}
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static int16_t sdl_axis_analog(sdl_input_t *sdl, unsigned port_num, uint32_t joyaxis)
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{
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if (joyaxis == AXIS_NONE)
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return 0;
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Sint16 val = 0;
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if (AXIS_NEG_GET(joyaxis) < sdl->num_axes[port_num])
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{
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val = SDL_JoystickGetAxis(sdl->joysticks[port_num], AXIS_NEG_GET(joyaxis));
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if (val > 0)
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val = 0;
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else if (val < -0x8000) // -0x8000 can cause trouble if we later abs() it.
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val = -0x7fff;
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}
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else if (AXIS_POS_GET(joyaxis) < sdl->num_axes[port_num])
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{
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val = SDL_JoystickGetAxis(sdl->joysticks[port_num], AXIS_POS_GET(joyaxis));
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if (val < 0)
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val = 0;
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}
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return val;
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}
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static bool sdl_axis_pressed(sdl_input_t *sdl, unsigned port_num, uint32_t joyaxis)
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{
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int16_t val = sdl_axis_analog(sdl, port_num, joyaxis);
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float scaled = (float)abs(val) / 0x8000;
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return scaled > g_settings.input.axis_threshold;
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}
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#endif
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static bool sdl_is_pressed(sdl_input_t *sdl, unsigned port_num, const struct retro_keybind *key)
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{
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if (sdl->use_keyboard && sdl_key_pressed(key->key))
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return true;
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#ifdef HAVE_DINPUT
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return sdl_dinput_pressed(sdl->di, port_num, key);
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#else
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if (sdl->joysticks[port_num] == NULL)
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return false;
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if (sdl_joykey_pressed(sdl, port_num, key->joykey))
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return true;
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if (sdl_axis_pressed(sdl, port_num, key->joyaxis))
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return true;
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#endif
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return false;
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}
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static bool sdl_bind_button_pressed(void *data, int key)
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{
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const struct retro_keybind *binds = g_settings.input.binds[0];
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if (key >= 0 && key < RARCH_BIND_LIST_END)
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{
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const struct retro_keybind *bind = &binds[key];
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return sdl_is_pressed((sdl_input_t*)data, 0, bind);
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}
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else
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return false;
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}
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static int16_t sdl_joypad_device_state(sdl_input_t *sdl, const struct retro_keybind **binds_,
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unsigned port_num, unsigned id)
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{
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const struct retro_keybind *binds = binds_[port_num];
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if (id < RARCH_BIND_LIST_END)
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{
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const struct retro_keybind *bind = &binds[id];
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return bind->valid ? (sdl_is_pressed(sdl, port_num, bind) ? 1 : 0) : 0;
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}
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else
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return 0;
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}
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static void conv_analog_id_to_bind_id(unsigned index, unsigned id,
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unsigned *id_minus, unsigned *id_plus)
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{
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switch ((index << 1) | id)
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{
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case (RETRO_DEVICE_INDEX_ANALOG_LEFT << 1) | RETRO_DEVICE_ID_ANALOG_X:
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*id_minus = RARCH_ANALOG_LEFT_X_MINUS;
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*id_plus = RARCH_ANALOG_LEFT_X_PLUS;
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break;
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case (RETRO_DEVICE_INDEX_ANALOG_LEFT << 1) | RETRO_DEVICE_ID_ANALOG_Y:
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*id_minus = RARCH_ANALOG_LEFT_Y_MINUS;
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*id_plus = RARCH_ANALOG_LEFT_Y_PLUS;
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break;
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case (RETRO_DEVICE_INDEX_ANALOG_RIGHT << 1) | RETRO_DEVICE_ID_ANALOG_X:
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*id_minus = RARCH_ANALOG_RIGHT_X_MINUS;
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*id_plus = RARCH_ANALOG_RIGHT_X_PLUS;
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break;
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case (RETRO_DEVICE_INDEX_ANALOG_RIGHT << 1) | RETRO_DEVICE_ID_ANALOG_Y:
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*id_minus = RARCH_ANALOG_RIGHT_Y_MINUS;
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*id_plus = RARCH_ANALOG_RIGHT_Y_PLUS;
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break;
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}
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}
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static int16_t sdl_analog_device_state(sdl_input_t *sdl, const struct retro_keybind **binds_,
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unsigned port_num, unsigned index, unsigned id)
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{
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const struct retro_keybind *binds = binds_[port_num];
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if (id >= RARCH_BIND_LIST_END)
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return 0;
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unsigned id_minus = 0;
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unsigned id_plus = 0;
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conv_analog_id_to_bind_id(index, id, &id_minus, &id_plus);
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const struct retro_keybind *bind_minus = &binds[id_minus];
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const struct retro_keybind *bind_plus = &binds[id_plus];
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if (!bind_minus->valid || !bind_plus->valid)
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return 0;
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// A user might have bound minus axis to positive axis in SDL.
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#ifdef HAVE_DINPUT
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int16_t pressed_minus = abs(sdl_dinput_axis(sdl->di, port_num, bind_minus));
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int16_t pressed_plus = abs(sdl_dinput_axis(sdl->di, port_num, bind_plus));
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#else
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int16_t pressed_minus = abs(sdl_axis_analog(sdl, port_num, bind_minus->joyaxis));
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int16_t pressed_plus = abs(sdl_axis_analog(sdl, port_num, bind_plus->joyaxis));
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#endif
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int16_t res = pressed_plus - pressed_minus;
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// TODO: Does it make sense to use axis thresholding here?
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if (res != 0)
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return res;
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int16_t digital_left = sdl_is_pressed(sdl, port_num, bind_minus) ? -0x7fff : 0;
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int16_t digital_right = sdl_is_pressed(sdl, port_num, bind_plus) ? 0x7fff : 0;
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return digital_right + digital_left;
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}
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static int16_t sdl_keyboard_device_state(sdl_input_t *sdl, unsigned id)
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{
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return sdl->use_keyboard && sdl_key_pressed(id);
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}
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static int16_t sdl_mouse_device_state(sdl_input_t *sdl, unsigned id)
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{
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switch (id)
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{
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case RETRO_DEVICE_ID_MOUSE_LEFT:
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return sdl->mouse_l;
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case RETRO_DEVICE_ID_MOUSE_RIGHT:
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return sdl->mouse_r;
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case RETRO_DEVICE_ID_MOUSE_X:
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return sdl->mouse_x;
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case RETRO_DEVICE_ID_MOUSE_Y:
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return sdl->mouse_y;
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default:
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return 0;
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}
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}
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static int16_t sdl_lightgun_device_state(sdl_input_t *sdl, unsigned id)
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{
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switch (id)
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{
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case RETRO_DEVICE_ID_LIGHTGUN_X:
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return sdl->mouse_x;
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case RETRO_DEVICE_ID_LIGHTGUN_Y:
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return sdl->mouse_y;
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case RETRO_DEVICE_ID_LIGHTGUN_TRIGGER:
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return sdl->mouse_l;
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case RETRO_DEVICE_ID_LIGHTGUN_CURSOR:
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return sdl->mouse_m;
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case RETRO_DEVICE_ID_LIGHTGUN_TURBO:
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return sdl->mouse_r;
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case RETRO_DEVICE_ID_LIGHTGUN_START:
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return sdl->mouse_m && sdl->mouse_r;
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case RETRO_DEVICE_ID_LIGHTGUN_PAUSE:
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return sdl->mouse_m && sdl->mouse_l;
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default:
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return 0;
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}
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}
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static int16_t sdl_input_state(void *data_, const struct retro_keybind **binds, unsigned port, unsigned device, unsigned index, unsigned id)
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{
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sdl_input_t *data = (sdl_input_t*)data_;
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switch (device)
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{
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case RETRO_DEVICE_JOYPAD:
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return sdl_joypad_device_state(data, binds, port, id);
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case RETRO_DEVICE_ANALOG:
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return sdl_analog_device_state(data, binds, port, index, id);
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case RETRO_DEVICE_MOUSE:
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return sdl_mouse_device_state(data, id);
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case RETRO_DEVICE_KEYBOARD:
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return sdl_keyboard_device_state(data, id);
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case RETRO_DEVICE_LIGHTGUN:
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return sdl_lightgun_device_state(data, id);
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default:
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return 0;
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}
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}
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static void sdl_input_free(void *data)
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{
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if (data)
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{
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// Flush out all pending events.
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SDL_Event event;
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while (SDL_PollEvent(&event));
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sdl_input_t *sdl = (sdl_input_t*)data;
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#ifdef HAVE_DINPUT
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sdl_dinput_free(sdl->di);
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#else
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for (int i = 0; i < MAX_PLAYERS; i++)
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{
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if (sdl->joysticks[i])
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SDL_JoystickClose(sdl->joysticks[i]);
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}
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SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
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#endif
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free(data);
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}
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}
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static void sdl_poll_mouse(sdl_input_t *sdl)
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{
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int _x, _y;
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Uint8 btn = SDL_GetRelativeMouseState(&_x, &_y);
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sdl->mouse_x = _x;
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sdl->mouse_y = _y;
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sdl->mouse_l = SDL_BUTTON(SDL_BUTTON_LEFT) & btn ? 1 : 0;
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sdl->mouse_r = SDL_BUTTON(SDL_BUTTON_RIGHT) & btn ? 1 : 0;
|
|
sdl->mouse_m = SDL_BUTTON(SDL_BUTTON_MIDDLE) & btn ? 1 : 0;
|
|
}
|
|
|
|
static void sdl_input_poll(void *data)
|
|
{
|
|
SDL_PumpEvents();
|
|
sdl_input_t *sdl = (sdl_input_t*)data;
|
|
|
|
#ifdef HAVE_DINPUT
|
|
sdl_dinput_poll(sdl->di);
|
|
#else
|
|
SDL_JoystickUpdate();
|
|
#endif
|
|
|
|
sdl_poll_mouse(sdl);
|
|
}
|
|
|
|
const input_driver_t input_sdl = {
|
|
sdl_input_init,
|
|
sdl_input_poll,
|
|
sdl_input_state,
|
|
sdl_bind_button_pressed,
|
|
sdl_input_free,
|
|
"sdl"
|
|
};
|
|
|