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/*
Copyright (C) 1997-2001 Id Software, Inc.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "common.h"
#include "key_public.h"
#include "in_public.h"
#include "cl_public.h"
#include "io_sleep.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <fcntl.h>
#include <linux/input.h>
#include <SDL.h>
static cvar_t *in_device;
static struct {
qboolean initialized;
grab_t grabbed;
int fd;
int dx, dy;
ioentry_t *io;
} evdev;
#define MAX_EVENTS 64
#define EVENT_SIZE sizeof( struct input_event )
static void ShutdownMouse( void );
static void GetMouseEvents( void ) {
struct input_event ev[MAX_EVENTS];
ssize_t bytes;
size_t i, count;
unsigned button, time;
if( !evdev.initialized || !evdev.grabbed /*|| !evdev.io->canread*/ ) {
return;
}
bytes = read( evdev.fd, ev, EVENT_SIZE * MAX_EVENTS );
if( bytes == -1 ) {
if( errno == EAGAIN || errno == EINTR ) {
return;
}
Com_EPrintf( "Couldn't read event: %s\n", strerror( errno ) );
ShutdownMouse();
return;
}
if( bytes < EVENT_SIZE ) {
return; // should not happen
}
count = bytes / EVENT_SIZE;
for( i = 0 ; i < count; i++ ) {
time = ev[i].time.tv_sec * 1000 + ev[i].time.tv_usec / 1000;
switch( ev[i].type ) {
case EV_KEY:
if( ev[i].code >= BTN_MOUSE && ev[i].code < BTN_MOUSE + 8 ) {
button = K_MOUSE1 + ev[i].code - BTN_MOUSE;
Key_Event( button, !!ev[i].value, time );
}
break;
case EV_REL:
switch( ev[i].code ) {
case REL_X:
evdev.dx += ( int )ev[i].value;
break;
case REL_Y:
evdev.dy += ( int )ev[i].value;
break;
case REL_WHEEL:
if( ( int )ev[i].value == 1 ) {
Key_Event( K_MWHEELUP, qtrue, time );
Key_Event( K_MWHEELUP, qfalse, time );
} else if( ( int )ev[i].value == -1 ) {
Key_Event( K_MWHEELDOWN, qtrue, time );
Key_Event( K_MWHEELDOWN, qfalse, time );
}
break;
case REL_HWHEEL:
if( ( int )ev[i].value == 1 ) {
Key_Event( K_MWHEELRIGHT, qtrue, time );
Key_Event( K_MWHEELRIGHT, qfalse, time );
} else if( ( int )ev[i].value == -1 ) {
Key_Event( K_MWHEELLEFT, qtrue, time );
Key_Event( K_MWHEELLEFT, qfalse, time );
}
break;
default:
break;
}
break;
default:
break;
}
}
}
static qboolean GetMouseMotion( int *dx, int *dy ) {
if( !evdev.initialized || !evdev.grabbed ) {
return qfalse;
}
*dx = evdev.dx;
*dy = evdev.dy;
evdev.dx = 0;
evdev.dy = 0;
return qtrue;
}
static void ShutdownMouse( void ) {
if( !evdev.initialized ) {
return;
}
IO_Remove( evdev.fd );
close( evdev.fd );
SDL_ShowCursor( SDL_ENABLE );
SDL_WM_GrabInput( SDL_GRAB_OFF );
SDL_WM_SetCaption( PRODUCT, APPLICATION );
memset( &evdev, 0, sizeof( evdev ) );
}
static qboolean InitMouse( void ) {
in_device = Cvar_Get( "in_device", "", 0 );
if( !in_device->string[0] ) {
Com_WPrintf( "No evdev input device specified.\n" );
return qfalse;
}
evdev.fd = open( in_device->string, O_RDONLY );
if( evdev.fd == -1 ) {
Com_EPrintf( "Couldn't open %s: %s\n", in_device->string,
strerror( errno ) );
return qfalse;
}
fcntl( evdev.fd, F_SETFL, fcntl( evdev.fd, F_GETFL, 0 ) | FNDELAY );
evdev.io = IO_Add( evdev.fd );
Com_Printf( "Evdev interface initialized.\n" );
evdev.initialized = qtrue;
return qtrue;
}
static void GrabMouse( grab_t grab ) {
if( !evdev.initialized ) {
return;
}
if( evdev.grabbed == grab ) {
evdev.dx = 0;
evdev.dy = 0;
return;
}
if( grab == IN_GRAB ) {
SDL_WM_GrabInput( SDL_GRAB_ON );
SDL_WM_SetCaption( "[" PRODUCT "]", APPLICATION );
SDL_ShowCursor( SDL_DISABLE );
evdev.io->wantread = qtrue;
} else {
if( evdev.grabbed == IN_GRAB ) {
SDL_WM_GrabInput( SDL_GRAB_OFF );
SDL_WM_SetCaption( PRODUCT, APPLICATION );
}
if( grab == IN_HIDE ) {
SDL_ShowCursor( SDL_DISABLE );
} else {
SDL_ShowCursor( SDL_ENABLE );
}
evdev.io->wantread = !!grab;
}
// pump pending events
if( grab ) {
struct input_event ev;
while( read( evdev.fd, &ev, EVENT_SIZE ) == EVENT_SIZE )
;
}
evdev.dx = 0;
evdev.dy = 0;
evdev.grabbed = grab;
}
static void WarpMouse( int x, int y ) {
SDL_WarpMouse( x, y );
}
/*
@@@@@@@@@@@@@@@@@@@
DI_FillAPI
@@@@@@@@@@@@@@@@@@@
*/
void DI_FillAPI( inputAPI_t *api ) {
api->Init = InitMouse;
api->Shutdown = ShutdownMouse;
api->Grab = GrabMouse;
api->Warp = WarpMouse;
api->GetEvents = GetMouseEvents;
api->GetMotion = GetMouseMotion;
}
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