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.
*/
#include "platform/platform.h"
#ifdef XASH_USE_EVDEV
#include "common.h"
#include "input.h"
#include "client.h"
#include <fcntl.h>
#include <errno.h>
#include <linux/input.h>
#include <dirent.h>
#define MAX_EVDEV_DEVICES 5
struct evdev_s
{
int initialized, devices;
int fds[MAX_EVDEV_DEVICES];
string paths[MAX_EVDEV_DEVICES];
qboolean grab;
double grabtime;
float x, y;
qboolean chars;
qboolean shift;
} evdev;
static int KeycodeFromEvdev(int keycode, int value)
{
switch (keycode) {
case KEY_0: return '0';
case KEY_1: return '1';
case KEY_2: return '2';
case KEY_3: return '3';
case KEY_4: return '4';
case KEY_5: return '5';
case KEY_6: return '6';
case KEY_7: return '7';
case KEY_8: return '8';
case KEY_9: return '9';
case KEY_BACKSPACE: return K_BACKSPACE;
case KEY_ENTER: return K_ENTER;
case KEY_ESC: return K_ESCAPE;
case KEY_KP0: return K_KP_INS;
case KEY_KP1: return K_KP_END;
case KEY_KP2: return K_KP_DOWNARROW;
case KEY_KP3: return K_KP_PGDN;
case KEY_KP4: return K_KP_LEFTARROW;
case KEY_KP5: return K_KP_5;
case KEY_KP6: return K_KP_RIGHTARROW;
case KEY_KP7: return K_KP_HOME;
case KEY_KP8: return K_KP_UPARROW;
case KEY_KP9: return K_KP_PGUP;
case KEY_KPDOT: return K_KP_DEL;
case KEY_KPENTER: return K_KP_ENTER;
case KEY_Q: return 'q';
case KEY_W: return 'w';
case KEY_E: return 'e';
case KEY_R: return 'r';
case KEY_T: return 't';
case KEY_Y: return 'y';
case KEY_U: return 'u';
case KEY_I: return 'i';
case KEY_O: return 'o';
case KEY_P: return 'p';
case KEY_A: return 'a';
case KEY_S: return 's';
case KEY_D: return 'd';
case KEY_F: return 'f';
case KEY_G: return 'g';
case KEY_H: return 'h';
case KEY_J: return 'j';
case KEY_K: return 'k';
case KEY_L: return 'l';
case KEY_Z: return 'z';
case KEY_X: return 'x';
case KEY_C: return 'c';
case KEY_V: return 'v';
case KEY_B: return 'b';
case KEY_N: return 'n';
case KEY_M: return 'm';
case KEY_LEFTBRACE: return '[';
case KEY_RIGHTBRACE: return ']';
case KEY_MINUS: return '-';
case KEY_EQUAL: return '=';
case KEY_TAB: return K_TAB;
case KEY_SEMICOLON: return ';';
case KEY_APOSTROPHE: return '\'';
case KEY_GRAVE: return '`';
case KEY_BACKSLASH: return '\\';
case KEY_COMMA: return ',';
case KEY_DOT: return '.';
case KEY_SLASH: return '/';
case KEY_SPACE: return K_SPACE;
case KEY_KPASTERISK: return '*';
case KEY_RIGHTCTRL:
case KEY_LEFTCTRL:
return K_CTRL;
case KEY_RIGHTSHIFT:
case KEY_LEFTSHIFT:
return K_SHIFT;
case KEY_LEFT: return K_LEFTARROW;
case KEY_RIGHT: return K_RIGHTARROW;
case KEY_UP: return K_UPARROW;
case KEY_DOWN: return K_DOWNARROW;
case BTN_LEFT: return K_MOUSE1;
case BTN_RIGHT: return K_MOUSE2;
case BTN_MIDDLE: return K_MOUSE3;
default:
break;
}
return 0;
}
static void Evdev_CheckPermissions( void )
{
#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 ) )
{
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 );
#if XASH_INPUT == INPUT_EVDEV
if( Sys_CheckParm( "-grab" ) )
ioctl( evdev.fds[i], EVIOCGRAB, (void*) 1 );
#endif
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 )
{
Con_Reportf( S_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 );
#if XASH_INPUT == INPUT_EVDEV
if( Sys_CheckParm( "-grab" ) )
ioctl( evdev.fds[i], EVIOCGRAB, (void*) 1 );
#endif
}
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;
const 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 ( void )
{
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 || XASH_INPUT == INPUT_EVDEV ) )
{
int key = KeycodeFromEvdev( ev.code, ev.value );
Key_Event ( key , ev.value );
if( evdev.chars && ev.value )
{
if( key >= 32 && key < 127 )
{
if( evdev.shift )
{
key = Q_toupper( key );
if( key == '-' )
key = '_';
if( key == '=' )
key = '+';
}
CL_CharEvent( key );
}
}
if( key == K_SHIFT )
evdev.shift = ev.value;
}
}
if( evdev.grab && evdev.grabtime <= host.realtime )
{
ioctl( evdev.fds[i], EVIOCGRAB, (void*) 1 );
Key_ClearStates();
}
if( CVAR_TO_BOOL(m_ignore) )
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 )
{
// grab only if evdev is secondary input source
#if XASH_INPUT != INPUT_EVDEV
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;
#endif
}
void IN_EvdevMove( float *yaw, float *pitch )
{
*yaw += evdev.x;
*pitch += evdev.y;
evdev.x = evdev.y = 0.0f;
}
#if XASH_INPUT == INPUT_EVDEV
void Platform_EnableTextInput( qboolean enable )
{
evdev.chars = enable;
evdev.shift = false;
}
#endif
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");
#if XASH_INPUT == INPUT_EVDEV
Evdev_Autodetect_f();
#endif
}
void Evdev_Shutdown( void )
{
int i;
Cmd_RemoveCommand( "evdev_open" );
Cmd_RemoveCommand( "evdev_close" );
Cmd_RemoveCommand( "evdev_autodetect" );
for( i = 0; i < evdev.devices; i++ )
{
ioctl( evdev.fds[i], EVIOCGRAB, (void*) 0 );
close( evdev.fds[i] );
evdev.fds[i] = -1;
}
evdev.devices = 0;
}
#endif // XASH_USE_EVDEV