mirror of
https://github.com/libretro/RetroArch.git
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344 lines
9.0 KiB
C
344 lines
9.0 KiB
C
/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
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* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
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*
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* Some code herein may be based on code found in BSNES.
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*
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* SSNES 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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* SSNES 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 SSNES.
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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 "SDL.h"
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#include <stdbool.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 <libsnes.hpp>
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#include "ssnes_sdl_input.h"
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static void* sdl_input_init(void)
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{
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sdl_input_t *sdl = 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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SSNES_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] == SSNES_NO_JOYPAD)
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continue;
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if (sdl->num_joysticks > g_settings.input.joypad_map[i])
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{
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sdl->joysticks[i] = SDL_JoystickOpen(g_settings.input.joypad_map[i]);
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if (!sdl->joysticks[i])
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{
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SSNES_ERR("Couldn't open SDL joystick #%u on SNES port %u\n", g_settings.input.joypad_map[i], 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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SSNES_LOG("Opened Joystick: %s #%u on port %u\n",
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SDL_JoystickName(g_settings.input.joypad_map[i]), g_settings.input.joypad_map[i], 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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}
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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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int num_keys;
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Uint8 *keymap = SDL_GetKeyState(&num_keys);
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if (key >= num_keys)
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return false;
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return keymap[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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int hat = GET_HAT(joykey);
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if (hat < sdl->num_hats[port_num])
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{
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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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if (dir & SDL_HAT_UP)
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return true;
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break;
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case HAT_DOWN_MASK:
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if (dir & SDL_HAT_DOWN)
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return true;
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break;
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case HAT_LEFT_MASK:
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if (dir & SDL_HAT_LEFT)
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return true;
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break;
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case HAT_RIGHT_MASK:
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if (dir & SDL_HAT_RIGHT)
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return true;
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break;
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default:
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break;
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}
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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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}
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return false;
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}
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static bool sdl_axis_pressed(sdl_input_t *sdl, int port_num, uint32_t joyaxis)
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{
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if (joyaxis == AXIS_NONE)
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return false;
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if (AXIS_NEG_GET(joyaxis) < sdl->num_axes[port_num])
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{
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Sint16 val = SDL_JoystickGetAxis(sdl->joysticks[port_num], AXIS_NEG_GET(joyaxis));
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float scaled = (float)val / 0x8000;
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if (scaled < -g_settings.input.axis_threshold)
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return true;
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}
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if (AXIS_POS_GET(joyaxis) < sdl->num_axes[port_num])
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{
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Sint16 val = SDL_JoystickGetAxis(sdl->joysticks[port_num], AXIS_POS_GET(joyaxis));
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float scaled = (float)val / 0x8000;
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if (scaled > g_settings.input.axis_threshold)
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return true;
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}
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return false;
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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 snes_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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// Only let player 1 use special binds called from main loop.
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const struct snes_keybind *binds = g_settings.input.binds[0];
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for (unsigned i = 0; binds[i].id != -1; i++)
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{
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if (binds[i].id == key)
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return sdl_is_pressed(data, 0, &binds[i]);
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}
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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 snes_keybind **binds,
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unsigned port_num, int id)
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{
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const struct snes_keybind *snes_keybinds = binds[port_num];
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for (unsigned i = 0; snes_keybinds[i].id != -1; i++)
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{
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if (snes_keybinds[i].id == id)
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return sdl_is_pressed(sdl, port_num, &snes_keybinds[i]) ? 1 : 0;
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}
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return 0;
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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 SNES_DEVICE_ID_MOUSE_LEFT:
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return sdl->mouse_l;
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case SNES_DEVICE_ID_MOUSE_RIGHT:
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return sdl->mouse_r;
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case SNES_DEVICE_ID_MOUSE_X:
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return sdl->mouse_x;
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case SNES_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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// TODO: Missing some controllers, but hey :)
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static int16_t sdl_scope_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 SNES_DEVICE_ID_SUPER_SCOPE_X:
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return sdl->mouse_x;
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case SNES_DEVICE_ID_SUPER_SCOPE_Y:
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return sdl->mouse_y;
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case SNES_DEVICE_ID_SUPER_SCOPE_TRIGGER:
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return sdl->mouse_l;
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case SNES_DEVICE_ID_SUPER_SCOPE_CURSOR:
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return sdl->mouse_m;
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case SNES_DEVICE_ID_SUPER_SCOPE_TURBO:
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return sdl->mouse_r;
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default:
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return 0;
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}
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}
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// TODO: Support two players.
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static int16_t sdl_justifier_device_state(sdl_input_t *sdl, unsigned index, unsigned id)
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{
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if (index == 0)
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{
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switch (id)
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{
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case SNES_DEVICE_ID_JUSTIFIER_X:
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return sdl->mouse_x;
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case SNES_DEVICE_ID_JUSTIFIER_Y:
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return sdl->mouse_y;
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case SNES_DEVICE_ID_JUSTIFIER_TRIGGER:
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return sdl->mouse_l;
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case SNES_DEVICE_ID_JUSTIFIER_START:
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return sdl->mouse_r;
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default:
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return 0;
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}
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}
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else
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return 0;
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}
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static int16_t sdl_input_state(void *data, const struct snes_keybind **binds, bool port, unsigned device, unsigned index, unsigned id)
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{
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switch (device)
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{
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case SNES_DEVICE_JOYPAD:
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return sdl_joypad_device_state(data, binds, (port == SNES_PORT_1) ? 0 : 1, id);
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case SNES_DEVICE_MULTITAP:
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return sdl_joypad_device_state(data, binds, (port == SNES_PORT_2) ? 1 + index : 0, id);
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case SNES_DEVICE_MOUSE:
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return sdl_mouse_device_state(data, id);
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case SNES_DEVICE_SUPER_SCOPE:
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return sdl_scope_device_state(data, id);
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case SNES_DEVICE_JUSTIFIER:
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case SNES_DEVICE_JUSTIFIERS:
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return sdl_justifier_device_state(data, index, 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 = 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;
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sdl->mouse_m = SDL_BUTTON(SDL_BUTTON_MIDDLE) & btn ? 1 : 0;
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}
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static void sdl_input_poll(void *data)
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{
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SDL_PumpEvents();
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sdl_input_t *sdl = data;
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#ifdef HAVE_DINPUT
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sdl_dinput_poll(sdl->di);
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#else
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SDL_JoystickUpdate();
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#endif
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sdl_poll_mouse(sdl);
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}
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const input_driver_t input_sdl = {
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.init = sdl_input_init,
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.poll = sdl_input_poll,
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.input_state = sdl_input_state,
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.key_pressed = sdl_bind_button_pressed,
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.free = sdl_input_free,
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.ident = "sdl"
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};
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