Xash3D FWGS engine.
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/*
in_evdev.c - linux evdev interface support
Copyright (C) 2015-2018 mittorn
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 3 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.
*/
#ifdef XASH_USE_EVDEV
#include <fcntl.h>
#include <errno.h>
#include <linux/input.h>
#include <dirent.h>
#include "common.h"
#include "input.h"
#include "client.h"
#include "vgui_draw.h"
#define MAX_EVDEV_DEVICES 5
struct evdev_s
{
int initialized, devices;
int fds[MAX_EVDEV_DEVICES];
string paths[MAX_EVDEV_DEVICES];
qboolean grab;
float grabtime;
float x, y;
} evdev;
int KeycodeFromEvdev(int keycode, int value);
static void Evdev_CheckPermissions()
{
#ifdef __ANDROID__
system( "su 0 chmod 664 /dev/input/event*" );
#endif
}
void Evdev_Setup( void )
{
if( evdev.initialized )
return;
#ifdef __ANDROID__
system( "su 0 supolicy --live \"allow appdomain input_device dir { ioctl read getattr search open }\" \"allow appdomain input_device chr_file { ioctl read write getattr lock append open }\"" );
system( "su 0 setenforce permissive" );
#endif
evdev.initialized = true;
}
#define EV_HASBIT( x, y ) ( x[y / 32] & (1 << y % 32) )
void Evdev_Autodetect_f( void )
{
int i;
DIR *dir;
struct dirent *entry;
Evdev_Setup();
Evdev_CheckPermissions();
if( !( dir = opendir( "/dev/input" ) ) )
return;
while( ( entry = readdir( dir ) ) )
{
int fd;
string path;
uint types[EV_MAX] = {0};
uint codes[( KEY_MAX - 1 ) / 32 + 1] = {0};
qboolean hasbtnmouse;
if( evdev.devices >= MAX_EVDEV_DEVICES )
continue;
Q_snprintf( path, MAX_STRING, "/dev/input/%s", entry->d_name );
for( i = 0; i < evdev.devices; i++ )
if( !Q_strncmp( evdev.paths[i], path, MAX_STRING ) )
goto next;
if( Q_strncmp( entry->d_name, "event", 5 ) )
continue;
fd = open( path, O_RDONLY | O_NONBLOCK );
if( fd == -1 )
continue;
ioctl( fd, EVIOCGBIT( 0, EV_MAX ), types );
if( !EV_HASBIT( types, EV_KEY ) )
goto close;
ioctl( fd, EVIOCGBIT( EV_KEY, KEY_MAX ), codes );
if( EV_HASBIT( codes, KEY_LEFTCTRL ) && EV_HASBIT( codes, KEY_SPACE ) )
goto open;
if( !EV_HASBIT( codes, BTN_MOUSE ) )
goto close;
if( EV_HASBIT( types, EV_REL ) )
{
Q_memset( codes, 0, sizeof( codes ) );
ioctl( fd, EVIOCGBIT( EV_REL, KEY_MAX ), codes );
if( !EV_HASBIT( codes, REL_X ) )
goto close;
if( !EV_HASBIT( codes, REL_Y ) )
goto close;
if( !EV_HASBIT( codes, REL_WHEEL ) )
goto close;
goto open;
}
goto close;
open:
Q_strncpy( evdev.paths[evdev.devices], path, MAX_STRING );
evdev.fds[evdev.devices++] = fd;
Msg( "Opened device %s\n", path );
goto next;
close:
close( fd );
next:
continue;
}
closedir( dir );
}
/*
===========
Evdev_OpenDevice
For shitty systems that cannot provide relative mouse axes
===========
*/
void Evdev_OpenDevice ( const char *path )
{
int ret, i;
if ( evdev.devices >= MAX_EVDEV_DEVICES )
{
Msg( "Only %d devices supported!\n", MAX_EVDEV_DEVICES );
return;
}
Evdev_Setup();
Evdev_CheckPermissions(); // use root to grant access to evdev
for( i = 0; i < evdev.devices; i++ )
{
if( !Q_strncmp( evdev.paths[i], path, MAX_STRING ) )
{
Msg( "device %s already open!\n", path );
return;
}
}
ret = open( path, O_RDONLY | O_NONBLOCK );
if( ret < 0 )
{
MsgDev( D_ERROR, "Could not open input device %s: %s\n", path, strerror( errno ) );
return;
}
Msg( "Input device #%d: %s opened sucessfully\n", evdev.devices, path );
evdev.fds[evdev.devices] = ret;
Q_strncpy( evdev.paths[evdev.devices++], path, MAX_STRING );
}
void Evdev_OpenDevice_f( void )
{
if( Cmd_Argc() < 2 )
Msg( S_USAGE "evdev_opendevice <path>\n" );
Evdev_OpenDevice( Cmd_Argv( 1 ) );
}
/*
===========
Evdev_CloseDevice_f
===========
*/
void Evdev_CloseDevice_f ( void )
{
uint i;
char *arg;
if( Cmd_Argc() < 2 )
return;
arg = Cmd_Argv( 1 );
if( Q_isdigit( arg ) )
i = Q_atoi( arg );
else for( i = 0; i < evdev.devices; i++ )
if( !Q_strncmp( evdev.paths[i], arg, MAX_STRING ) )
break;
if( i >= evdev.devices )
{
Msg( "Device %s is not open\n", arg );
return;
}
close( evdev.fds[i] );
evdev.devices--;
Msg( "Device %s closed successfully\n", evdev.paths[i] );
for( ; i < evdev.devices; i++ )
{
Q_strncpy( evdev.paths[i], evdev.paths[i+1], MAX_STRING );
evdev.fds[i] = evdev.fds[i+1];
}
}
void IN_EvdevFrame ()
{
int dx = 0, dy = 0, i;
for( i = 0; i < evdev.devices; i++ )
{
struct input_event ev;
while ( read( evdev.fds[i], &ev, 16) == 16 )
{
if ( ev.type == EV_REL )
{
switch ( ev.code )
{
case REL_X: dx += ev.value;
break;
case REL_Y: dy += ev.value;
break;
case REL_WHEEL:
if( ev.value > 0)
{
Key_Event( K_MWHEELDOWN, 1 );
Key_Event( K_MWHEELDOWN, 0 );
}
else
{
Key_Event( K_MWHEELUP, 1 );
Key_Event( K_MWHEELUP, 0 );
}
break;
}
}
else if ( ( ev.type == EV_KEY ) && cls.key_dest == key_game )
{
switch( ev.code )
{
case BTN_LEFT:
Key_Event( K_MOUSE1, ev.value );
break;
case BTN_MIDDLE:
Key_Event( K_MOUSE3, ev.value );
break;
case BTN_RIGHT:
Key_Event( K_MOUSE2, ev.value );
break;
default:
Key_Event ( KeycodeFromEvdev( ev.code, ev.value ) , ev.value);
}
}
}
if( evdev.grab && evdev.grabtime <= host.realtime )
{
ioctl( evdev.fds[i], EVIOCGRAB, (void*) 1 );
Key_ClearStates();
}
if( m_ignore->integer )
continue;
evdev.x += -dx * m_yaw->value;
evdev.y += dy * m_pitch->value;
}
if( evdev.grabtime <= host.realtime )
evdev.grab = false;
}
void Evdev_SetGrab( qboolean grab )
{
int i;
if( grab )
{
Key_Event( K_ESCAPE, 0 ); //Do not leave ESC down
evdev.grabtime = host.realtime + 0.5;
Key_ClearStates();
}
else
{
for( i = 0; i < evdev.devices; i++ )
ioctl( evdev.fds[i], EVIOCGRAB, (void*) 0 );
}
evdev.grab = grab;
}
void IN_EvdevMove( float *yaw, float *pitch )
{
*yaw += evdev.x;
*pitch += evdev.y;
evdev.x = evdev.y = 0.0f;
}
void Evdev_Init( void )
{
Cmd_AddCommand ("evdev_open", Evdev_OpenDevice_f, "Open event device");
Cmd_AddCommand ("evdev_close", Evdev_CloseDevice_f, "Close event device");
Cmd_AddCommand ("evdev_autodetect", Evdev_Autodetect_f, "Automaticly open mouses and keyboards");
}
void Evdev_Shutdown( void )
{
Cmd_RemoveCommand( "evdev_open" );
Cmd_RemoveCommand( "evdev_close" );
Cmd_RemoveCommand( "evdev_autodetect" );
}
#endif // XASH_USE_EVDEV