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/*
(c) Copyright 2000-2002 convergence integrated media GmbH.
(c) Copyright 2002 convergence GmbH.
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Hundt <andi@fischlustig.de> and
Sven Neumann <sven@convergence.de>.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/poll.h>
#include <fcntl.h>
#include <directfb.h>
#include <core/coredefs.h>
#include <core/coretypes.h>
#include <core/input.h>
#include <direct/mem.h>
#include <direct/messages.h>
#include <direct/thread.h>
#define DFB_INPUTDRIVER_HAS_AXIS_INFO
#include <core/input_driver.h>
DFB_INPUT_DRIVER( divine )
#define PIPE_PATH "/tmp/divine"
/*
* declaration of private data
*/
typedef struct {
int fd;
CoreInputDevice *device;
DirectThread *thread;
} DiVineData;
/*
* Input thread reading from pipe.
* Directly passes read events to input core.
*/
static void*
divineEventThread( DirectThread *thread, void *driver_data )
{
DiVineData *data = (DiVineData*) driver_data;
DFBInputEvent event;
struct pollfd pfd;
/* fill poll info */
pfd.fd = data->fd;
pfd.events = POLLIN;
/* wait for the next event */
while (poll( &pfd, 1, -1 ) > 0 || errno == EINTR) {
direct_thread_testcancel( thread );
/* read the next event from the pipe */
if (read( data->fd, &event, sizeof(DFBInputEvent) ) == sizeof(DFBInputEvent)) {
/* directly dispatch the event */
dfb_input_dispatch( data->device, &event );
} else
usleep( 20000 ); /* avoid 100% CPU usage in case poll() doesn't work */
}
D_PERROR( "divine thread died\n" );
return NULL;
}
/* exported symbols */
/*
* Return the number of available devices.
* Called once during initialization of DirectFB.
*/
static int
driver_get_available()
{
int fd;
/* create the pipe if not already existent */
if (mkfifo( PIPE_PATH, 0660 ) && errno != EEXIST) {
D_PERROR( "DirectFB/DiVine: could not create pipe '%s'\n", PIPE_PATH );
return 0;
}
/* try to open pipe */
fd = open( PIPE_PATH, O_RDONLY | O_NONBLOCK );
if (fd < 0) {
D_PERROR( "DirectFB/DiVine: could not open pipe '%s'\n", PIPE_PATH );
return 0;
}
/* close pipe */
close( fd );
return 1;
}
/*
* Fill out general information about this driver.
* Called once during initialization of DirectFB.
*/
static void
driver_get_info( InputDriverInfo *info )
{
/* fill driver info structure */
snprintf( info->name,
DFB_INPUT_DRIVER_INFO_NAME_LENGTH, "DiVine Driver" );
snprintf( info->vendor,
DFB_INPUT_DRIVER_INFO_VENDOR_LENGTH, "Convergence GmbH" );
info->version.major = DIVINE_MAJOR_VERSION;
info->version.minor = DIVINE_MINOR_VERSION;
}
/*
* Open the pipe, fill out information about device,
* allocate and fill private data, start input thread.
* Called during initialization, resuming or taking over mastership.
*/
static DFBResult
driver_open_device( CoreInputDevice *device,
unsigned int number,
InputDeviceInfo *info,
void **driver_data )
{
int fd;
DiVineData *data;
/* open pipe */
fd = open( PIPE_PATH, O_RDONLY | O_NONBLOCK );
if (fd < 0) {
D_PERROR( "DirectFB/DiVine: could not open pipe '%s'\n", PIPE_PATH );
return DFB_INIT;
}
/* set device name */
snprintf( info->desc.name,
DFB_INPUT_DEVICE_DESC_NAME_LENGTH, "Virtual Input" );
/* set device vendor */
snprintf( info->desc.vendor,
DFB_INPUT_DEVICE_DESC_VENDOR_LENGTH, "DirectFB" );
/* set one of the primary input device IDs */
info->prefered_id = DIDID_ANY;
/* set type flags */
info->desc.type = DIDTF_KEYBOARD | DIDTF_MOUSE |
DIDTF_JOYSTICK | DIDTF_REMOTE | DIDTF_VIRTUAL;
/* set capabilities */
info->desc.caps = DICAPS_ALL;
info->desc.max_axis = DIAI_LAST;
/* allocate and fill private data */
data = D_CALLOC( 1, sizeof(DiVineData) );
data->fd = fd;
data->device = device;
/* start input thread */
data->thread = direct_thread_create( DTT_INPUT, divineEventThread, data, "Virtual Input" );
/* set private data pointer */
*driver_data = data;
return DFB_OK;
}
/*
* Fetch one entry from the device's keymap if supported.
*/
static DFBResult
driver_get_keymap_entry( CoreInputDevice *device,
void *driver_data,
DFBInputDeviceKeymapEntry *entry )
{
return DFB_UNSUPPORTED;
}
static DFBResult
driver_get_axis_info( CoreInputDevice *device,
void *driver_data,
DFBInputDeviceAxisIdentifier axis,
DFBInputDeviceAxisInfo *ret_info )
{
ret_info->flags = DIAIF_ABS_MIN | DIAIF_ABS_MAX;
ret_info->abs_min = 0;
ret_info->abs_max = 65535;
return DFB_OK;
}
/*
* End thread, close device and free private data.
*/
static void
driver_close_device( void *driver_data )
{
DiVineData *data = (DiVineData*) driver_data;
/* stop input thread */
direct_thread_cancel( data->thread );
direct_thread_join( data->thread );
direct_thread_destroy( data->thread );
/* close pipe */
close( data->fd );
/* free private data */
D_FREE( data );
}
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