RetroArch/input/sdl_input.c

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/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
*
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* 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.
*
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* 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.
*
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* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
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#include "../driver.h"
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#include "SDL.h"
#include "../gfx/gfx_context.h"
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#include "../boolean.h"
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#include "../general.h"
#include <stdint.h>
#include <stdlib.h>
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#include "../libretro.h"
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#include "input_common.h"
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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;
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} sdl_input_t;
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static void *sdl_input_init(void)
{
input_init_keyboard_lut(rarch_key_map_sdl);
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sdl_input_t *sdl = (sdl_input_t*)calloc(1, sizeof(*sdl));
if (!sdl)
return NULL;
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sdl->joypad = input_joypad_init_driver(g_settings.input.joypad_driver);
return sdl;
}
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static bool sdl_key_pressed(int key)
{
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if (key >= RETROK_LAST)
return false;
int sym = input_translate_rk_to_keysym((enum retro_key)key);
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int num_keys;
Uint8 *keymap = SDL_GetKeyState(&num_keys);
if (sym < 0 || sym >= num_keys)
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return false;
return keymap[sym];
}
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static bool sdl_is_pressed(sdl_input_t *sdl, unsigned port_num, const struct retro_keybind *binds, unsigned key)
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{
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if (sdl_key_pressed(binds[key].key))
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return true;
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return input_joypad_pressed(sdl->joypad, port_num, binds, key);
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}
static bool sdl_bind_button_pressed(void *data, int key)
{
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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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return sdl_is_pressed((sdl_input_t*)data, 0, binds, key);
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else
return false;
}
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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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const struct retro_keybind *binds = binds_[port_num];
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if (id < RARCH_BIND_LIST_END)
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return binds[id].valid && sdl_is_pressed(sdl, port_num, binds, id);
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else
return 0;
}
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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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return input_joypad_analog(sdl->joypad, port_num, index, id, binds[port_num]);
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}
static int16_t sdl_keyboard_device_state(sdl_input_t *sdl, unsigned id)
{
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return sdl_key_pressed(id);
}
static int16_t sdl_mouse_device_state(sdl_input_t *sdl, unsigned id)
{
switch (id)
{
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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;
default:
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return 0;
}
}
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static int16_t sdl_pointer_device_state(sdl_input_t *sdl, unsigned index, unsigned id, bool screen)
{
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if (index != 0)
return 0;
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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;
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if (screen)
{
res_x = res_screen_x;
res_y = res_screen_y;
}
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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;
}
}
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static int16_t sdl_lightgun_device_state(sdl_input_t *sdl, unsigned id)
{
switch (id)
{
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case RETRO_DEVICE_ID_LIGHTGUN_X:
return sdl->mouse_x;
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case RETRO_DEVICE_ID_LIGHTGUN_Y:
return sdl->mouse_y;
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case RETRO_DEVICE_ID_LIGHTGUN_TRIGGER:
return sdl->mouse_l;
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case RETRO_DEVICE_ID_LIGHTGUN_CURSOR:
return sdl->mouse_m;
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case RETRO_DEVICE_ID_LIGHTGUN_TURBO:
return sdl->mouse_r;
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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;
}
}
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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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sdl_input_t *data = (sdl_input_t*)data_;
switch (device)
{
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case RETRO_DEVICE_JOYPAD:
return sdl_joypad_device_state(data, binds, port, id);
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case RETRO_DEVICE_ANALOG:
return sdl_analog_device_state(data, binds, port, index, id);
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case RETRO_DEVICE_MOUSE:
return sdl_mouse_device_state(data, id);
case RETRO_DEVICE_POINTER:
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case RARCH_DEVICE_POINTER_SCREEN:
return sdl_pointer_device_state(data, index, id, device == RARCH_DEVICE_POINTER_SCREEN);
case RETRO_DEVICE_KEYBOARD:
return sdl_keyboard_device_state(data, id);
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case RETRO_DEVICE_LIGHTGUN:
return sdl_lightgun_device_state(data, id);
default:
return 0;
}
}
static void sdl_input_free(void *data)
{
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if (!data)
return;
// Flush out all pending events.
SDL_Event event;
while (SDL_PollEvent(&event));
sdl_input_t *sdl = (sdl_input_t*)data;
if (sdl->joypad)
sdl->joypad->destroy();
free(data);
}
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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;
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}
static void sdl_input_poll(void *data)
{
SDL_PumpEvents();
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sdl_input_t *sdl = (sdl_input_t*)data;
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input_joypad_poll(sdl->joypad);
sdl_poll_mouse(sdl);
}
const input_driver_t input_sdl = {
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sdl_input_init,
sdl_input_poll,
sdl_input_state,
sdl_bind_button_pressed,
sdl_input_free,
NULL,
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"sdl",
};