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/* sdljoystick.c: routines for dealing with the SDL joystick
Copyright (c) 2003-2004 Darren Salt, Fredrick Meunier, Philip Kendall
$Id: sdljoystick.c 3749 2008-08-15 12:47:44Z fredm $
This program 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 Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
Fred: fredm@spamcop.net
*/
#include <config.h>
#if !defined USE_JOYSTICK || defined HAVE_JSW_H
/* Fake joystick, or override UI-specific handling */
#include "../uijoystick.c"
#else /* #if !defined USE_JOYSTICK || defined HAVE_JSW_H */
#include <SDL.h>
#include "compat.h"
#include "input.h"
#include "sdljoystick.h"
#include "settings.h"
#include "ui/ui.h"
#include "ui/uijoystick.h"
static SDL_Joystick *joystick1 = NULL;
static SDL_Joystick *joystick2 = NULL;
static void do_axis( int which, Sint16 value, input_key negative,
input_key positive );
int
ui_joystick_init( void )
{
int error, retval;
error = SDL_InitSubSystem( SDL_INIT_JOYSTICK );
if ( error ) {
ui_error( UI_ERROR_ERROR, "failed to initialise joystick subsystem" );
return 0;
}
retval = SDL_NumJoysticks();
if( retval >= 2 ) {
retval = 2;
if( ( joystick2 = SDL_JoystickOpen( 1 ) ) == NULL ) {
ui_error( UI_ERROR_ERROR, "failed to initialise joystick 2" );
return 0;
}
if( SDL_JoystickNumAxes( joystick2 ) < 2 ||
SDL_JoystickNumButtons( joystick2 ) < 1 ) {
ui_error( UI_ERROR_ERROR, "sorry, joystick 2 is inadequate!" );
return 0;
}
}
if( retval > 0 ) {
if( ( joystick1 = SDL_JoystickOpen( 0 ) ) == NULL ) {
ui_error( UI_ERROR_ERROR, "failed to initialise joystick 1" );
return 0;
}
if( SDL_JoystickNumAxes( joystick1 ) < 2 ||
SDL_JoystickNumButtons( joystick1 ) < 1 ) {
ui_error( UI_ERROR_ERROR, "sorry, joystick 1 is inadequate!" );
return 0;
}
}
SDL_JoystickEventState( SDL_ENABLE );
return retval;
}
void
ui_joystick_poll( void )
{
/* No action needed; joysticks already handled by the SDL events
system */
}
static void
button_action( SDL_JoyButtonEvent *buttonevent, input_event_type type )
{
int button;
input_event_t event;
button = buttonevent->button;
if( button > 9 ) return; /* We support 'only' 10 fire buttons */
event.type = type;
event.types.joystick.which = buttonevent->which;
event.types.joystick.button = INPUT_JOYSTICK_FIRE_1 + button;
input_event( &event );
}
void
sdljoystick_buttonpress( SDL_JoyButtonEvent *buttonevent )
{
button_action( buttonevent, INPUT_EVENT_JOYSTICK_PRESS );
}
void
sdljoystick_buttonrelease( SDL_JoyButtonEvent *buttonevent )
{
button_action( buttonevent, INPUT_EVENT_JOYSTICK_RELEASE );
}
void
sdljoystick_axismove( SDL_JoyAxisEvent *axisevent )
{
if( axisevent->axis == 0 ) {
do_axis( axisevent->which, axisevent->value,
INPUT_JOYSTICK_LEFT, INPUT_JOYSTICK_RIGHT );
} else if( axisevent->axis == 1 ) {
do_axis( axisevent->which, axisevent->value,
INPUT_JOYSTICK_UP, INPUT_JOYSTICK_DOWN );
}
}
static void
do_axis( int which, Sint16 value, input_key negative, input_key positive )
{
input_event_t event1, event2;
event1.types.joystick.which = event2.types.joystick.which = which;
event1.types.joystick.button = negative;
event2.types.joystick.button = positive;
if( value > 16384 ) {
event1.type = INPUT_EVENT_JOYSTICK_RELEASE;
event2.type = INPUT_EVENT_JOYSTICK_PRESS;
} else if( value < -16384 ) {
event1.type = INPUT_EVENT_JOYSTICK_PRESS;
event2.type = INPUT_EVENT_JOYSTICK_RELEASE;
} else {
event1.type = INPUT_EVENT_JOYSTICK_RELEASE;
event2.type = INPUT_EVENT_JOYSTICK_RELEASE;
}
input_event( &event1 );
input_event( &event2 );
}
void
ui_joystick_end( void )
{
if( joystick1 != NULL || joystick2 != NULL ) {
SDL_JoystickEventState( SDL_IGNORE );
if( joystick1 != NULL ) SDL_JoystickClose( joystick1 );
if( joystick2 != NULL ) SDL_JoystickClose( joystick2 );
joystick1 = NULL;
joystick2 = NULL;
}
SDL_QuitSubSystem( SDL_INIT_JOYSTICK );
}
#endif /* #if !defined USE_JOYSTICK || defined HAVE_JSW_H */
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