mirror of https://github.com/FWGS/xash3d-fwgs
338 lines
6.7 KiB
C
338 lines
6.7 KiB
C
/*
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in_evdev.c - linux evdev interface support
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Copyright (C) 2015-2018 mittorn
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#ifdef XASH_USE_EVDEV
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#include <fcntl.h>
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#include <errno.h>
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#include <linux/input.h>
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#include <dirent.h>
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#include "common.h"
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#include "input.h"
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#include "client.h"
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#include "vgui_draw.h"
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#define MAX_EVDEV_DEVICES 5
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struct evdev_s
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{
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int initialized, devices;
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int fds[MAX_EVDEV_DEVICES];
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string paths[MAX_EVDEV_DEVICES];
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qboolean grab;
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float grabtime;
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float x, y;
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} evdev;
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int KeycodeFromEvdev(int keycode, int value);
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static void Evdev_CheckPermissions()
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{
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#ifdef __ANDROID__
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system( "su 0 chmod 664 /dev/input/event*" );
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#endif
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}
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void Evdev_Setup( void )
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{
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if( evdev.initialized )
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return;
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#ifdef __ANDROID__
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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 }\"" );
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system( "su 0 setenforce permissive" );
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#endif
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evdev.initialized = true;
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}
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#define EV_HASBIT( x, y ) ( x[y / 32] & (1 << y % 32) )
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void Evdev_Autodetect_f( void )
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{
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int i;
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DIR *dir;
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struct dirent *entry;
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Evdev_Setup();
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Evdev_CheckPermissions();
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if( !( dir = opendir( "/dev/input" ) ) )
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return;
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while( ( entry = readdir( dir ) ) )
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{
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int fd;
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string path;
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uint types[EV_MAX] = {0};
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uint codes[( KEY_MAX - 1 ) / 32 + 1] = {0};
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qboolean hasbtnmouse;
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if( evdev.devices >= MAX_EVDEV_DEVICES )
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continue;
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Q_snprintf( path, MAX_STRING, "/dev/input/%s", entry->d_name );
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for( i = 0; i < evdev.devices; i++ )
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if( !Q_strncmp( evdev.paths[i], path, MAX_STRING ) )
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goto next;
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if( Q_strncmp( entry->d_name, "event", 5 ) )
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continue;
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fd = open( path, O_RDONLY | O_NONBLOCK );
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if( fd == -1 )
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continue;
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ioctl( fd, EVIOCGBIT( 0, EV_MAX ), types );
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if( !EV_HASBIT( types, EV_KEY ) )
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goto close;
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ioctl( fd, EVIOCGBIT( EV_KEY, KEY_MAX ), codes );
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if( EV_HASBIT( codes, KEY_LEFTCTRL ) && EV_HASBIT( codes, KEY_SPACE ) )
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goto open;
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if( !EV_HASBIT( codes, BTN_MOUSE ) )
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goto close;
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if( EV_HASBIT( types, EV_REL ) )
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{
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Q_memset( codes, 0, sizeof( codes ) );
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ioctl( fd, EVIOCGBIT( EV_REL, KEY_MAX ), codes );
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if( !EV_HASBIT( codes, REL_X ) )
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goto close;
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if( !EV_HASBIT( codes, REL_Y ) )
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goto close;
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if( !EV_HASBIT( codes, REL_WHEEL ) )
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goto close;
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goto open;
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}
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goto close;
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open:
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Q_strncpy( evdev.paths[evdev.devices], path, MAX_STRING );
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evdev.fds[evdev.devices++] = fd;
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Msg( "Opened device %s\n", path );
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goto next;
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close:
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close( fd );
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next:
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continue;
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}
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closedir( dir );
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}
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/*
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===========
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Evdev_OpenDevice
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For shitty systems that cannot provide relative mouse axes
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===========
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*/
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void Evdev_OpenDevice ( const char *path )
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{
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int ret, i;
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if ( evdev.devices >= MAX_EVDEV_DEVICES )
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{
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Msg( "Only %d devices supported!\n", MAX_EVDEV_DEVICES );
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return;
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}
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Evdev_Setup();
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Evdev_CheckPermissions(); // use root to grant access to evdev
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for( i = 0; i < evdev.devices; i++ )
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{
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if( !Q_strncmp( evdev.paths[i], path, MAX_STRING ) )
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{
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Msg( "device %s already open!\n", path );
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return;
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}
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}
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ret = open( path, O_RDONLY | O_NONBLOCK );
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if( ret < 0 )
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{
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Con_Reportf( S_ERROR "Could not open input device %s: %s\n", path, strerror( errno ) );
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return;
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}
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Msg( "Input device #%d: %s opened sucessfully\n", evdev.devices, path );
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evdev.fds[evdev.devices] = ret;
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Q_strncpy( evdev.paths[evdev.devices++], path, MAX_STRING );
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}
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void Evdev_OpenDevice_f( void )
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{
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if( Cmd_Argc() < 2 )
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Msg( S_USAGE "evdev_opendevice <path>\n" );
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Evdev_OpenDevice( Cmd_Argv( 1 ) );
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}
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/*
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===========
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Evdev_CloseDevice_f
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===========
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*/
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void Evdev_CloseDevice_f ( void )
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{
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uint i;
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char *arg;
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if( Cmd_Argc() < 2 )
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return;
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arg = Cmd_Argv( 1 );
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if( Q_isdigit( arg ) )
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i = Q_atoi( arg );
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else for( i = 0; i < evdev.devices; i++ )
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if( !Q_strncmp( evdev.paths[i], arg, MAX_STRING ) )
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break;
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if( i >= evdev.devices )
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{
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Msg( "Device %s is not open\n", arg );
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return;
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}
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close( evdev.fds[i] );
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evdev.devices--;
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Msg( "Device %s closed successfully\n", evdev.paths[i] );
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for( ; i < evdev.devices; i++ )
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{
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Q_strncpy( evdev.paths[i], evdev.paths[i+1], MAX_STRING );
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evdev.fds[i] = evdev.fds[i+1];
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}
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}
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void IN_EvdevFrame ()
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{
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int dx = 0, dy = 0, i;
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for( i = 0; i < evdev.devices; i++ )
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{
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struct input_event ev;
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while ( read( evdev.fds[i], &ev, 16) == 16 )
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{
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if ( ev.type == EV_REL )
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{
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switch ( ev.code )
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{
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case REL_X: dx += ev.value;
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break;
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case REL_Y: dy += ev.value;
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break;
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case REL_WHEEL:
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if( ev.value > 0)
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{
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Key_Event( K_MWHEELDOWN, 1 );
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Key_Event( K_MWHEELDOWN, 0 );
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}
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else
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{
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Key_Event( K_MWHEELUP, 1 );
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Key_Event( K_MWHEELUP, 0 );
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}
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break;
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}
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}
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else if ( ( ev.type == EV_KEY ) && cls.key_dest == key_game )
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{
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switch( ev.code )
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{
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case BTN_LEFT:
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Key_Event( K_MOUSE1, ev.value );
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break;
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case BTN_MIDDLE:
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Key_Event( K_MOUSE3, ev.value );
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break;
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case BTN_RIGHT:
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Key_Event( K_MOUSE2, ev.value );
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break;
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default:
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Key_Event ( KeycodeFromEvdev( ev.code, ev.value ) , ev.value);
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}
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}
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}
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if( evdev.grab && evdev.grabtime <= host.realtime )
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{
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ioctl( evdev.fds[i], EVIOCGRAB, (void*) 1 );
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Key_ClearStates();
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}
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if( m_ignore->integer )
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continue;
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evdev.x += -dx * m_yaw->value;
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evdev.y += dy * m_pitch->value;
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}
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if( evdev.grabtime <= host.realtime )
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evdev.grab = false;
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}
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void Evdev_SetGrab( qboolean grab )
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{
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int i;
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if( grab )
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{
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Key_Event( K_ESCAPE, 0 ); //Do not leave ESC down
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evdev.grabtime = host.realtime + 0.5;
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Key_ClearStates();
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}
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else
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{
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for( i = 0; i < evdev.devices; i++ )
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ioctl( evdev.fds[i], EVIOCGRAB, (void*) 0 );
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}
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evdev.grab = grab;
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}
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void IN_EvdevMove( float *yaw, float *pitch )
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{
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*yaw += evdev.x;
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*pitch += evdev.y;
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evdev.x = evdev.y = 0.0f;
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}
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void Evdev_Init( void )
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{
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Cmd_AddCommand ("evdev_open", Evdev_OpenDevice_f, "Open event device");
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Cmd_AddCommand ("evdev_close", Evdev_CloseDevice_f, "Close event device");
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Cmd_AddCommand ("evdev_autodetect", Evdev_Autodetect_f, "Automaticly open mouses and keyboards");
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}
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void Evdev_Shutdown( void )
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{
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Cmd_RemoveCommand( "evdev_open" );
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Cmd_RemoveCommand( "evdev_close" );
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Cmd_RemoveCommand( "evdev_autodetect" );
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}
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#endif // XASH_USE_EVDEV
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