RetroArch/input/sdl_joypad.c
Themaister d40cd53e24 Rewrite retroarch-joyconfig.
Rewrites a large chunk of retroarch-joyconfig to work with "any" joypad
driver. This allows e.g. the tool to work without X. SDL event pumps
require X to work (for some reason).
2012-09-29 21:57:03 +02:00

168 lines
4.0 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2012 - 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 "input_common.h"
#include "SDL.h"
#include "../general.h"
struct sdl_joypad
{
SDL_Joystick *joypad;
unsigned num_axes;
unsigned num_buttons;
unsigned num_hats;
};
static struct sdl_joypad g_pads[MAX_PLAYERS];
static void sdl_joypad_destroy(void)
{
for (unsigned i = 0; i < MAX_PLAYERS; i++)
{
if (g_pads[i].joypad)
SDL_JoystickClose(g_pads[i].joypad);
}
SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
memset(g_pads, 0, sizeof(g_pads));
}
static bool sdl_joypad_init(void)
{
if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
return false;
unsigned num_sticks = SDL_NumJoysticks();
if (num_sticks > MAX_PLAYERS)
num_sticks = MAX_PLAYERS;
for (unsigned i = 0; i < num_sticks; i++)
{
struct sdl_joypad *pad = &g_pads[i];
pad->joypad = SDL_JoystickOpen(i);
if (!pad->joypad)
{
RARCH_ERR("Couldn't open SDL joystick #%u.\n", i);
goto error;
}
RARCH_LOG("Opened Joystick: %s (#%u).\n",
SDL_JoystickName(i), i);
pad->num_axes = SDL_JoystickNumAxes(pad->joypad);
pad->num_buttons = SDL_JoystickNumButtons(pad->joypad);
pad->num_hats = SDL_JoystickNumHats(pad->joypad);
RARCH_LOG("Joypad has: %u axes, %u buttons, %u hats.\n",
pad->num_axes, pad->num_buttons, pad->num_hats);
}
return true;
error:
sdl_joypad_destroy();
return false;
}
static bool sdl_joypad_button(unsigned port, uint16_t joykey)
{
if (joykey == NO_BTN)
return false;
const struct sdl_joypad *pad = &g_pads[port];
if (!pad->joypad)
return false;
// Check hat.
if (GET_HAT_DIR(joykey))
{
uint16_t hat = GET_HAT(joykey);
if (hat >= pad->num_hats)
return false;
Uint8 dir = SDL_JoystickGetHat(pad->joypad, hat);
switch (GET_HAT_DIR(joykey))
{
case HAT_UP_MASK:
return dir & SDL_HAT_UP;
case HAT_DOWN_MASK:
return dir & SDL_HAT_DOWN;
case HAT_LEFT_MASK:
return dir & SDL_HAT_LEFT;
case HAT_RIGHT_MASK:
return dir & SDL_HAT_RIGHT;
default:
return false;
}
}
else // Check the button
{
if (joykey < pad->num_buttons && SDL_JoystickGetButton(pad->joypad, joykey))
return true;
return false;
}
}
static int16_t sdl_joypad_axis(unsigned port, uint32_t joyaxis)
{
if (joyaxis == AXIS_NONE)
return 0;
const struct sdl_joypad *pad = &g_pads[port];
if (!pad->joypad)
return false;
Sint16 val = 0;
if (AXIS_NEG_GET(joyaxis) < pad->num_axes)
{
val = SDL_JoystickGetAxis(pad->joypad, AXIS_NEG_GET(joyaxis));
if (val > 0)
val = 0;
else if (val < -0x7fff) // -0x8000 can cause trouble if we later abs() it.
val = -0x7fff;
}
else if (AXIS_POS_GET(joyaxis) < pad->num_axes)
{
val = SDL_JoystickGetAxis(pad->joypad, AXIS_POS_GET(joyaxis));
if (val < 0)
val = 0;
}
return val;
}
static void sdl_joypad_poll(void)
{
SDL_JoystickUpdate();
}
static bool sdl_joypad_query_pad(unsigned pad)
{
return pad < MAX_PLAYERS && g_pads[pad].joypad;
}
const rarch_joypad_driver_t sdl_joypad = {
sdl_joypad_init,
sdl_joypad_query_pad,
sdl_joypad_destroy,
sdl_joypad_button,
sdl_joypad_axis,
sdl_joypad_poll,
"sdl",
};