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libfprint/libfprint/fp-device.c
Marco Trevisan (Treviño) 41f8737b48 device: Deprecate fp_device_{supports,has}_* functions for has_feature 
We can avoid having multiple device feature-check functions now and
just rely on a few.

Add uncrustify config to properly handle begin/end deprecation macros.
2021-04-12 22:14:06 +02:00

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/*
* FpDevice - A fingerprint reader device
* Copyright (C) 2019 Benjamin Berg <bberg@redhat.com>
* Copyright (C) 2019 Marco Trevisan <marco.trevisan@canonical.com>
*
* 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 2.1 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define FP_COMPONENT "device"
#include "fpi-log.h"
#include "fp-device-private.h"
/**
* SECTION: fp-device
* @title: FpDevice
* @short_description: Fingerpint device routines
*
* These are the public #FpDevice routines.
*/
static void fp_device_async_initable_iface_init (GAsyncInitableIface *iface);
G_DEFINE_TYPE_EXTENDED (FpDevice, fp_device, G_TYPE_OBJECT, G_TYPE_FLAG_ABSTRACT,
G_IMPLEMENT_INTERFACE (G_TYPE_ASYNC_INITABLE,
fp_device_async_initable_iface_init)
G_ADD_PRIVATE (FpDevice))
enum {
PROP_0,
PROP_DRIVER,
PROP_DEVICE_ID,
PROP_NAME,
PROP_OPEN,
PROP_REMOVED,
PROP_NR_ENROLL_STAGES,
PROP_SCAN_TYPE,
PROP_FINGER_STATUS,
PROP_FPI_ENVIRON,
PROP_FPI_USB_DEVICE,
PROP_FPI_UDEV_DATA_SPIDEV,
PROP_FPI_UDEV_DATA_HIDRAW,
PROP_FPI_DRIVER_DATA,
N_PROPS
};
static GParamSpec *properties[N_PROPS];
enum {
REMOVED_SIGNAL,
N_SIGNALS
};
static guint signals[N_SIGNALS] = { 0, };
/**
* fp_device_retry_quark:
*
* Return value: Quark representing a retryable error.
**/
G_DEFINE_QUARK (fp - device - retry - quark, fp_device_retry)
/**
* fp_device_error_quark:
*
* Return value: Quark representing a device error.
**/
G_DEFINE_QUARK (fp - device - error - quark, fp_device_error)
static gboolean
fp_device_cancel_in_idle_cb (gpointer user_data)
{
FpDevice *self = user_data;
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (self);
FpDevicePrivate *priv = fp_device_get_instance_private (self);
g_assert (cls->cancel);
g_assert (priv->current_action != FPI_DEVICE_ACTION_NONE);
g_debug ("Idle cancelling on ongoing operation!");
priv->current_idle_cancel_source = NULL;
cls->cancel (self);
fpi_device_report_finger_status (self, FP_FINGER_STATUS_NONE);
return G_SOURCE_REMOVE;
}
/* Notify the class that the task was cancelled; this should be connected
* with the GTask as the user_data object for automatic cleanup together
* with the task. */
static void
fp_device_cancelled_cb (GCancellable *cancellable, FpDevice *self)
{
FpDevicePrivate *priv = fp_device_get_instance_private (self);
priv->current_idle_cancel_source = g_idle_source_new ();
g_source_set_callback (priv->current_idle_cancel_source,
fp_device_cancel_in_idle_cb,
self,
NULL);
g_source_attach (priv->current_idle_cancel_source, NULL);
g_source_unref (priv->current_idle_cancel_source);
}
static void
maybe_cancel_on_cancelled (FpDevice *device,
GCancellable *cancellable)
{
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (device);
FpDevicePrivate *priv = fp_device_get_instance_private (device);
if (!cancellable || !cls->cancel)
return;
priv->current_cancellable_id = g_cancellable_connect (cancellable,
G_CALLBACK (fp_device_cancelled_cb),
device,
NULL);
}
static void
fp_device_constructed (GObject *object)
{
FpDevice *self = (FpDevice *) object;
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (self);
FpDevicePrivate *priv = fp_device_get_instance_private (self);
g_assert (cls->features != FP_DEVICE_FEATURE_NONE);
priv->type = cls->type;
if (cls->nr_enroll_stages)
priv->nr_enroll_stages = cls->nr_enroll_stages;
priv->scan_type = cls->scan_type;
priv->device_name = g_strdup (cls->full_name);
priv->device_id = g_strdup ("0");
G_OBJECT_CLASS (fp_device_parent_class)->constructed (object);
}
static void
fp_device_finalize (GObject *object)
{
FpDevice *self = (FpDevice *) object;
FpDevicePrivate *priv = fp_device_get_instance_private (self);
g_assert (priv->current_action == FPI_DEVICE_ACTION_NONE);
g_assert (priv->current_task == NULL);
if (priv->is_open)
g_warning ("User destroyed open device! Not cleaning up properly!");
g_slist_free_full (priv->sources, (GDestroyNotify) g_source_destroy);
g_clear_pointer (&priv->current_idle_cancel_source, g_source_destroy);
g_clear_pointer (&priv->current_task_idle_return_source, g_source_destroy);
g_clear_pointer (&priv->device_id, g_free);
g_clear_pointer (&priv->device_name, g_free);
g_clear_object (&priv->usb_device);
g_clear_pointer (&priv->virtual_env, g_free);
g_clear_pointer (&priv->udev_data.spidev_path, g_free);
g_clear_pointer (&priv->udev_data.hidraw_path, g_free);
G_OBJECT_CLASS (fp_device_parent_class)->finalize (object);
}
static void
fp_device_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
FpDevice *self = FP_DEVICE (object);
FpDevicePrivate *priv = fp_device_get_instance_private (self);
switch (prop_id)
{
case PROP_NR_ENROLL_STAGES:
g_value_set_uint (value, priv->nr_enroll_stages);
break;
case PROP_SCAN_TYPE:
g_value_set_enum (value, priv->scan_type);
break;
case PROP_FINGER_STATUS:
g_value_set_flags (value, priv->finger_status);
break;
case PROP_DRIVER:
g_value_set_static_string (value, FP_DEVICE_GET_CLASS (self)->id);
break;
case PROP_DEVICE_ID:
g_value_set_string (value, priv->device_id);
break;
case PROP_NAME:
g_value_set_string (value, priv->device_name);
break;
case PROP_OPEN:
g_value_set_boolean (value, priv->is_open);
break;
case PROP_REMOVED:
g_value_set_boolean (value, priv->is_removed);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
fp_device_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
FpDevice *self = FP_DEVICE (object);
FpDevicePrivate *priv = fp_device_get_instance_private (self);
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (self);
/* _construct has not run yet, so we cannot use priv->type. */
switch (prop_id)
{
case PROP_FPI_ENVIRON:
if (cls->type == FP_DEVICE_TYPE_VIRTUAL)
priv->virtual_env = g_value_dup_string (value);
else
g_assert (g_value_get_string (value) == NULL);
break;
case PROP_FPI_USB_DEVICE:
if (cls->type == FP_DEVICE_TYPE_USB)
priv->usb_device = g_value_dup_object (value);
else
g_assert (g_value_get_object (value) == NULL);
break;
case PROP_FPI_UDEV_DATA_SPIDEV:
if (cls->type == FP_DEVICE_TYPE_UDEV)
priv->udev_data.spidev_path = g_value_dup_string (value);
else
g_assert (g_value_get_string (value) == NULL);
break;
case PROP_FPI_UDEV_DATA_HIDRAW:
if (cls->type == FP_DEVICE_TYPE_UDEV)
priv->udev_data.hidraw_path = g_value_dup_string (value);
else
g_assert (g_value_get_string (value) == NULL);
break;
case PROP_FPI_DRIVER_DATA:
priv->driver_data = g_value_get_uint64 (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
fp_device_async_initable_init_async (GAsyncInitable *initable,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
FpDevice *self = FP_DEVICE (initable);
FpDevicePrivate *priv = fp_device_get_instance_private (self);
/* It is next to impossible to call async_init at the wrong time. */
g_assert (!priv->is_open);
g_assert (!priv->current_task);
task = g_task_new (self, cancellable, callback, user_data);
if (g_task_return_error_if_cancelled (task))
return;
if (!FP_DEVICE_GET_CLASS (self)->probe)
{
g_task_return_boolean (task, TRUE);
return;
}
priv->current_action = FPI_DEVICE_ACTION_PROBE;
priv->current_task = g_steal_pointer (&task);
maybe_cancel_on_cancelled (self, cancellable);
FP_DEVICE_GET_CLASS (self)->probe (self);
}
static gboolean
fp_device_async_initable_init_finish (GAsyncInitable *initable,
GAsyncResult *res,
GError **error)
{
return g_task_propagate_boolean (G_TASK (res), error);
}
static void
fp_device_async_initable_iface_init (GAsyncInitableIface *iface)
{
iface->init_async = fp_device_async_initable_init_async;
iface->init_finish = fp_device_async_initable_init_finish;
}
static void
fp_device_class_init (FpDeviceClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->constructed = fp_device_constructed;
object_class->finalize = fp_device_finalize;
object_class->get_property = fp_device_get_property;
object_class->set_property = fp_device_set_property;
properties[PROP_NR_ENROLL_STAGES] =
g_param_spec_uint ("nr-enroll-stages",
"EnrollStages",
"Number of enroll stages needed on the device",
0, G_MAXUINT,
0,
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
properties[PROP_SCAN_TYPE] =
g_param_spec_enum ("scan-type",
"ScanType",
"The scan type of the device",
FP_TYPE_SCAN_TYPE, FP_SCAN_TYPE_SWIPE,
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
properties[PROP_FINGER_STATUS] =
g_param_spec_flags ("finger-status",
"FingerStatus",
"The status of the finger",
FP_TYPE_FINGER_STATUS_FLAGS, FP_FINGER_STATUS_NONE,
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
properties[PROP_DRIVER] =
g_param_spec_string ("driver",
"Driver",
"String describing the driver",
NULL,
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
properties[PROP_DEVICE_ID] =
g_param_spec_string ("device-id",
"Device ID",
"String describing the device, often generic but may be a serial number",
"",
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
properties[PROP_NAME] =
g_param_spec_string ("name",
"Device Name",
"Human readable name for the device",
NULL,
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
properties[PROP_OPEN] =
g_param_spec_boolean ("open",
"Opened",
"Whether the device is open or not", FALSE,
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
properties[PROP_REMOVED] =
g_param_spec_boolean ("removed",
"Removed",
"Whether the device has been removed from the system", FALSE,
G_PARAM_STATIC_STRINGS | G_PARAM_READABLE);
/**
* FpDevice::removed:
* @device: the #FpDevice instance that emitted the signal
*
* This signal is emitted after the device has been removed and no operation
* is pending anymore.
*
* The API user is still required to close a removed device. The above
* guarantee means that the call to close the device can be made immediately
* from the signal handler.
*
* The close operation will return FP_DEVICE_ERROR_REMOVED, but the device
* will still be considered closed afterwards.
*
* The device will only be removed from the #FpContext after it has been
* closed by the API user.
**/
signals[REMOVED_SIGNAL] = g_signal_new ("removed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL,
NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE,
0);
/* Private properties */
/**
* FpDevice::fpi-environ: (skip)
*
* This property is only for internal purposes.
*
* Stability: private
*/
properties[PROP_FPI_ENVIRON] =
g_param_spec_string ("fpi-environ",
"Virtual Environment",
"Private: The environment variable for the virtual device",
NULL,
G_PARAM_STATIC_STRINGS | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY);
/**
* FpDevice::fpi-usb-device: (skip)
*
* This property is only for internal purposes.
*
* Stability: private
*/
properties[PROP_FPI_USB_DEVICE] =
g_param_spec_object ("fpi-usb-device",
"USB Device",
"Private: The USB device for the device",
G_USB_TYPE_DEVICE,
G_PARAM_STATIC_STRINGS | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY);
/**
* FpDevice::fpi-udev-data-spidev: (skip)
*
* This property is only for internal purposes.
*
* Stability: private
*/
properties[PROP_FPI_UDEV_DATA_SPIDEV] =
g_param_spec_string ("fpi-udev-data-spidev",
"Udev data: spidev path",
"Private: The path to /dev/spidevN.M",
NULL,
G_PARAM_STATIC_STRINGS | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY);
/**
* FpDevice::fpi-udev-data-hidraw: (skip)
*
* This property is only for internal purposes.
*
* Stability: private
*/
properties[PROP_FPI_UDEV_DATA_HIDRAW] =
g_param_spec_string ("fpi-udev-data-hidraw",
"Udev data: hidraw path",
"Private: The path to /dev/hidrawN",
NULL,
G_PARAM_STATIC_STRINGS | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY);
/**
* FpDevice::fpi-driver-data: (skip)
*
* This property is only for internal purposes.
*
* Stability: private
*/
properties[PROP_FPI_DRIVER_DATA] =
g_param_spec_uint64 ("fpi-driver-data",
"Driver Data",
"Private: The driver data from the ID table entry",
0,
G_MAXUINT64,
0,
G_PARAM_STATIC_STRINGS | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_properties (object_class, N_PROPS, properties);
}
static void
fp_device_init (FpDevice *self)
{
}
/**
* fp_device_get_driver:
* @device: A #FpDevice
*
* Returns: (transfer none): The ID of the driver
*/
const gchar *
fp_device_get_driver (FpDevice *device)
{
g_return_val_if_fail (FP_IS_DEVICE (device), NULL);
return FP_DEVICE_GET_CLASS (device)->id;
}
/**
* fp_device_get_device_id:
* @device: A #FpDevice
*
* Returns: (transfer none): The ID of the device
*/
const gchar *
fp_device_get_device_id (FpDevice *device)
{
FpDevicePrivate *priv = fp_device_get_instance_private (device);
g_return_val_if_fail (FP_IS_DEVICE (device), NULL);
return priv->device_id;
}
/**
* fp_device_get_name:
* @device: A #FpDevice
*
* Returns: (transfer none): The human readable name of the device
*/
const gchar *
fp_device_get_name (FpDevice *device)
{
FpDevicePrivate *priv = fp_device_get_instance_private (device);
g_return_val_if_fail (FP_IS_DEVICE (device), NULL);
return priv->device_name;
}
/**
* fp_device_is_open:
* @device: A #FpDevice
*
* Returns: Whether the device is open or not
*/
gboolean
fp_device_is_open (FpDevice *device)
{
FpDevicePrivate *priv = fp_device_get_instance_private (device);
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
return priv->is_open;
}
/**
* fp_device_get_scan_type:
* @device: A #FpDevice
*
* Retrieves the scan type of the device.
*
* Returns: The #FpScanType
*/
FpScanType
fp_device_get_scan_type (FpDevice *device)
{
FpDevicePrivate *priv = fp_device_get_instance_private (device);
g_return_val_if_fail (FP_IS_DEVICE (device), FP_SCAN_TYPE_SWIPE);
return priv->scan_type;
}
/**
* fp_device_get_finger_status:
* @device: A #FpDevice
*
* Retrieves the finger status flags for the device.
* This can be used by the UI to present the relevant feedback, although it
* is not guaranteed to be a relevant value when not performing any action.
*
* Returns: The current #FpFingerStatusFlags
*/
FpFingerStatusFlags
fp_device_get_finger_status (FpDevice *device)
{
FpDevicePrivate *priv = fp_device_get_instance_private (device);
g_return_val_if_fail (FP_IS_DEVICE (device), FP_FINGER_STATUS_NONE);
return priv->finger_status;
}
/**
* fp_device_get_nr_enroll_stages:
* @device: A #FpDevice
*
* Retrieves the number of enroll stages for this device.
*
* Returns: The number of enroll stages
*/
gint
fp_device_get_nr_enroll_stages (FpDevice *device)
{
FpDevicePrivate *priv = fp_device_get_instance_private (device);
g_return_val_if_fail (FP_IS_DEVICE (device), -1);
return priv->nr_enroll_stages;
}
/**
* fp_device_supports_identify:
* @device: A #FpDevice
*
* Check whether the device supports identification.
*
* Returns: Whether the device supports identification
* Deprecated: 1.92.0: Use fp_device_has_feature() instead.
*/
gboolean
fp_device_supports_identify (FpDevice *device)
{
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (device);
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
return cls->identify && !!(cls->features & FP_DEVICE_FEATURE_IDENTIFY);
}
/**
* fp_device_supports_capture:
* @device: A #FpDevice
*
* Check whether the device supports capturing images.
*
* Returns: Whether the device supports image capture
* Deprecated: 1.92.0: Use fp_device_has_feature() instead.
*/
gboolean
fp_device_supports_capture (FpDevice *device)
{
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (device);
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
return cls->capture && !!(cls->features & FP_DEVICE_FEATURE_CAPTURE);
}
/**
* fp_device_has_storage:
* @device: A #FpDevice
*
* Whether the device has on-chip storage. If it has, you can list the
* prints stored on the with fp_device_list_prints() and you should
* always delete prints from the device again using
* fp_device_delete_print().
* Deprecated: 1.92.0: Use fp_device_has_feature() instead.
*/
gboolean
fp_device_has_storage (FpDevice *device)
{
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (device);
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
return !!(cls->features & FP_DEVICE_FEATURE_STORAGE);
}
/**
* fp_device_open:
* @device: a #FpDevice
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: the function to call on completion
* @user_data: the data to pass to @callback
*
* Start an asynchronous operation to open the device. The callback will
* be called once the operation has finished. Retrieve the result with
* fp_device_open_finish().
*/
void
fp_device_open (FpDevice *device,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
FpDevicePrivate *priv = fp_device_get_instance_private (device);
GError *error = NULL;
task = g_task_new (device, cancellable, callback, user_data);
if (g_task_return_error_if_cancelled (task))
return;
if (priv->is_open)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_ALREADY_OPEN));
return;
}
if (priv->current_task)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_BUSY));
return;
}
switch (priv->type)
{
case FP_DEVICE_TYPE_USB:
if (!g_usb_device_open (priv->usb_device, &error))
{
g_task_return_error (task, error);
return;
}
break;
case FP_DEVICE_TYPE_VIRTUAL:
case FP_DEVICE_TYPE_UDEV:
break;
default:
g_assert_not_reached ();
g_task_return_error (task, fpi_device_error_new (FP_DEVICE_ERROR_GENERAL));
return;
}
priv->current_action = FPI_DEVICE_ACTION_OPEN;
priv->current_task = g_steal_pointer (&task);
maybe_cancel_on_cancelled (device, cancellable);
fpi_device_report_finger_status (device, FP_FINGER_STATUS_NONE);
FP_DEVICE_GET_CLASS (device)->open (device);
}
/**
* fp_device_open_finish:
* @device: A #FpDevice
* @result: A #GAsyncResult
* @error: Return location for errors, or %NULL to ignore
*
* Finish an asynchronous operation to open the device.
* See fp_device_open().
*
* Returns: (type void): %FALSE on error, %TRUE otherwise
*/
gboolean
fp_device_open_finish (FpDevice *device,
GAsyncResult *result,
GError **error)
{
return g_task_propagate_boolean (G_TASK (result), error);
}
/**
* fp_device_close:
* @device: a #FpDevice
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: the function to call on completion
* @user_data: the data to pass to @callback
*
* Start an asynchronous operation to close the device. The callback will
* be called once the operation has finished. Retrieve the result with
* fp_device_close_finish().
*/
void
fp_device_close (FpDevice *device,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
FpDevicePrivate *priv = fp_device_get_instance_private (device);
task = g_task_new (device, cancellable, callback, user_data);
if (g_task_return_error_if_cancelled (task))
return;
if (!priv->is_open)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_NOT_OPEN));
return;
}
if (priv->current_task)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_BUSY));
return;
}
priv->current_action = FPI_DEVICE_ACTION_CLOSE;
priv->current_task = g_steal_pointer (&task);
maybe_cancel_on_cancelled (device, cancellable);
FP_DEVICE_GET_CLASS (device)->close (device);
}
/**
* fp_device_close_finish:
* @device: A #FpDevice
* @result: A #GAsyncResult
* @error: Return location for errors, or %NULL to ignore
*
* Finish an asynchronous operation to close the device.
* See fp_device_close().
*
* Returns: (type void): %FALSE on error, %TRUE otherwise
*/
gboolean
fp_device_close_finish (FpDevice *device,
GAsyncResult *result,
GError **error)
{
return g_task_propagate_boolean (G_TASK (result), error);
}
/**
* fp_device_enroll:
* @device: a #FpDevice
* @template_print: (transfer floating): a #FpPrint
* @cancellable: (nullable): a #GCancellable, or %NULL
* @progress_cb: (nullable) (scope notified): progress reporting callback
* @progress_data: (closure progress_cb): user data for @progress_cb
* @progress_destroy: (destroy progress_data): Destroy notify for @progress_data
* @callback: (scope async): the function to call on completion
* @user_data: the data to pass to @callback
*
* Start an asynchronous operation to enroll a print. The callback will
* be called once the operation has finished. Retrieve the result with
* fp_device_enroll_finish().
*
* The @template_print parameter is a #FpPrint with available metadata filled
* in. The driver may make use of this metadata, when e.g. storing the print on
* device memory. It is undefined whether this print is filled in by the driver
* and returned, or whether the driver will return a newly created print after
* enrollment succeeded.
*/
void
fp_device_enroll (FpDevice *device,
FpPrint *template_print,
GCancellable *cancellable,
FpEnrollProgress progress_cb,
gpointer progress_data,
GDestroyNotify progress_destroy,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
FpDevicePrivate *priv = fp_device_get_instance_private (device);
FpEnrollData *data;
FpiPrintType print_type;
task = g_task_new (device, cancellable, callback, user_data);
if (g_task_return_error_if_cancelled (task))
return;
if (!priv->is_open)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_NOT_OPEN));
return;
}
if (priv->current_task)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_BUSY));
return;
}
if (!FP_IS_PRINT (template_print))
{
g_warning ("User did not pass a print template!");
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_DATA_INVALID));
return;
}
g_object_get (template_print, "fpi-type", &print_type, NULL);
if (print_type != FPI_PRINT_UNDEFINED)
{
g_warning ("Passed print template must be newly created and blank!");
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_DATA_INVALID));
return;
}
priv->current_action = FPI_DEVICE_ACTION_ENROLL;
priv->current_task = g_steal_pointer (&task);
maybe_cancel_on_cancelled (device, cancellable);
data = g_new0 (FpEnrollData, 1);
data->print = g_object_ref_sink (template_print);
data->enroll_progress_cb = progress_cb;
data->enroll_progress_data = progress_data;
data->enroll_progress_destroy = progress_destroy;
// Attach the progress data as task data so that it is destroyed
g_task_set_task_data (priv->current_task, data, (GDestroyNotify) enroll_data_free);
FP_DEVICE_GET_CLASS (device)->enroll (device);
}
/**
* fp_device_enroll_finish:
* @device: A #FpDevice
* @result: A #GAsyncResult
* @error: Return location for errors, or %NULL to ignore
*
* Finish an asynchronous operation to enroll a print. You should check
* for an error of type %FP_DEVICE_RETRY to prompt the user again if there
* was an interaction issue.
* See fp_device_enroll().
*
* Returns: (transfer full): The enrolled #FpPrint, or %NULL on error
*/
FpPrint *
fp_device_enroll_finish (FpDevice *device,
GAsyncResult *result,
GError **error)
{
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* fp_device_verify:
* @device: a #FpDevice
* @enrolled_print: a #FpPrint to verify
* @cancellable: (nullable): a #GCancellable, or %NULL
* @match_cb: (nullable) (scope notified): match reporting callback
* @match_data: (closure match_cb): user data for @match_cb
* @match_destroy: (destroy match_data): Destroy notify for @match_data
* @callback: the function to call on completion
* @user_data: the data to pass to @callback
*
* Start an asynchronous operation to verify a print. The callback will
* be called once the operation has finished. Retrieve the result with
* fp_device_verify_finish().
*/
void
fp_device_verify (FpDevice *device,
FpPrint *enrolled_print,
GCancellable *cancellable,
FpMatchCb match_cb,
gpointer match_data,
GDestroyNotify match_destroy,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
FpDevicePrivate *priv = fp_device_get_instance_private (device);
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (device);
FpMatchData *data;
task = g_task_new (device, cancellable, callback, user_data);
if (g_task_return_error_if_cancelled (task))
return;
if (!priv->is_open)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_NOT_OPEN));
return;
}
if (priv->current_task)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_BUSY));
return;
}
if (!cls->verify || !(cls->features & FP_DEVICE_FEATURE_VERIFY))
{
g_task_return_error (task,
fpi_device_error_new_msg (FP_DEVICE_ERROR_NOT_SUPPORTED,
"Device has no verification support"));
return;
}
priv->current_action = FPI_DEVICE_ACTION_VERIFY;
priv->current_task = g_steal_pointer (&task);
maybe_cancel_on_cancelled (device, cancellable);
data = g_new0 (FpMatchData, 1);
data->enrolled_print = g_object_ref (enrolled_print);
data->match_cb = match_cb;
data->match_data = match_data;
data->match_destroy = match_destroy;
// Attach the match data as task data so that it is destroyed
g_task_set_task_data (priv->current_task, data, (GDestroyNotify) match_data_free);
cls->verify (device);
}
/**
* fp_device_verify_finish:
* @device: A #FpDevice
* @result: A #GAsyncResult
* @match: (out): Whether the user presented the correct finger
* @print: (out) (transfer full) (nullable): Location to store the scanned print, or %NULL to ignore
* @error: Return location for errors, or %NULL to ignore
*
* Finish an asynchronous operation to verify an enrolled print. You should check
* for an error of type %FP_DEVICE_RETRY to prompt the user again if there
* was an interaction issue.
*
* With @print you can fetch the newly created print and retrieve the image data if available.
*
* See fp_device_verify().
*
* Returns: (type void): %FALSE on error, %TRUE otherwise
*/
gboolean
fp_device_verify_finish (FpDevice *device,
GAsyncResult *result,
gboolean *match,
FpPrint **print,
GError **error)
{
gint res;
res = g_task_propagate_int (G_TASK (result), error);
if (print)
{
FpMatchData *data;
data = g_task_get_task_data (G_TASK (result));
*print = data ? data->print : NULL;
if (*print)
g_object_ref (*print);
}
if (match)
*match = res == FPI_MATCH_SUCCESS;
return res != FPI_MATCH_ERROR;
}
/**
* fp_device_identify:
* @device: a #FpDevice
* @prints: (element-type FpPrint) (transfer none): #GPtrArray of #FpPrint
* @cancellable: (nullable): a #GCancellable, or %NULL
* @match_cb: (nullable) (scope notified): match reporting callback
* @match_data: (closure match_cb): user data for @match_cb
* @match_destroy: (destroy match_data): Destroy notify for @match_data
* @callback: the function to call on completion
* @user_data: the data to pass to @callback
*
* Start an asynchronous operation to identify prints. The callback will
* be called once the operation has finished. Retrieve the result with
* fp_device_identify_finish().
*/
void
fp_device_identify (FpDevice *device,
GPtrArray *prints,
GCancellable *cancellable,
FpMatchCb match_cb,
gpointer match_data,
GDestroyNotify match_destroy,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
FpDevicePrivate *priv = fp_device_get_instance_private (device);
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (device);
FpMatchData *data;
int i;
task = g_task_new (device, cancellable, callback, user_data);
if (g_task_return_error_if_cancelled (task))
return;
if (!priv->is_open)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_NOT_OPEN));
return;
}
if (priv->current_task)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_BUSY));
return;
}
if (!cls->identify || !(cls->features & FP_DEVICE_FEATURE_IDENTIFY))
{
g_task_return_error (task,
fpi_device_error_new_msg (FP_DEVICE_ERROR_NOT_SUPPORTED,
"Device has not identification support"));
return;
}
priv->current_action = FPI_DEVICE_ACTION_IDENTIFY;
priv->current_task = g_steal_pointer (&task);
maybe_cancel_on_cancelled (device, cancellable);
data = g_new0 (FpMatchData, 1);
/* We cannot store the gallery directly, because the ptr array may not own
* a reference to each print. Also, the caller could in principle modify the
* GPtrArray afterwards.
*/
data->gallery = g_ptr_array_new_full (prints->len, g_object_unref);
for (i = 0; i < prints->len; i++)
g_ptr_array_add (data->gallery, g_object_ref (g_ptr_array_index (prints, i)));
data->match_cb = match_cb;
data->match_data = match_data;
data->match_destroy = match_destroy;
// Attach the match data as task data so that it is destroyed
g_task_set_task_data (priv->current_task, data, (GDestroyNotify) match_data_free);
cls->identify (device);
}
/**
* fp_device_identify_finish:
* @device: A #FpDevice
* @result: A #GAsyncResult
* @match: (out) (transfer full) (nullable): Location for the matched #FpPrint, or %NULL
* @print: (out) (transfer full) (nullable): Location for the new #FpPrint, or %NULL
* @error: Return location for errors, or %NULL to ignore
*
* Finish an asynchronous operation to identify a print. You should check
* for an error of type %FP_DEVICE_RETRY to prompt the user again if there
* was an interaction issue.
*
* Use @match to find the print that matched. With @print you can fetch the
* newly created print and retrieve the image data if available.
*
* See fp_device_identify().
*
* Returns: (type void): %FALSE on error, %TRUE otherwise
*/
gboolean
fp_device_identify_finish (FpDevice *device,
GAsyncResult *result,
FpPrint **match,
FpPrint **print,
GError **error)
{
FpMatchData *data;
data = g_task_get_task_data (G_TASK (result));
if (print)
{
*print = data ? data->print : NULL;
if (*print)
g_object_ref (*print);
}
if (match)
{
*match = data ? data->match : NULL;
if (*match)
g_object_ref (*match);
}
return g_task_propagate_boolean (G_TASK (result), error);
}
/**
* fp_device_capture:
* @device: a #FpDevice
* @wait_for_finger: Whether to wait for a finger or not
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: the function to call on completion
* @user_data: the data to pass to @callback
*
* Start an asynchronous operation to capture an image. The callback will
* be called once the operation has finished. Retrieve the result with
* fp_device_capture_finish().
*/
void
fp_device_capture (FpDevice *device,
gboolean wait_for_finger,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
FpDevicePrivate *priv = fp_device_get_instance_private (device);
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (device);
task = g_task_new (device, cancellable, callback, user_data);
if (g_task_return_error_if_cancelled (task))
return;
if (!priv->is_open)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_NOT_OPEN));
return;
}
if (priv->current_task)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_BUSY));
return;
}
if (!cls->capture || !(cls->features & FP_DEVICE_FEATURE_CAPTURE))
{
g_task_return_error (task,
fpi_device_error_new_msg (FP_DEVICE_ERROR_NOT_SUPPORTED,
"Device has no verification support"));
return;
}
priv->current_action = FPI_DEVICE_ACTION_CAPTURE;
priv->current_task = g_steal_pointer (&task);
maybe_cancel_on_cancelled (device, cancellable);
priv->wait_for_finger = wait_for_finger;
cls->capture (device);
}
/**
* fp_device_capture_finish:
* @device: A #FpDevice
* @result: A #GAsyncResult
* @error: Return location for errors, or %NULL to ignore
*
* Finish an asynchronous operation to capture an image. You should check
* for an error of type %FP_DEVICE_RETRY to prompt the user again if there
* was an interaction issue.
*
* See fp_device_capture().
*
* Returns: (transfer full): #FpImage or %NULL on error
*/
FpImage *
fp_device_capture_finish (FpDevice *device,
GAsyncResult *result,
GError **error)
{
return g_task_propagate_pointer (G_TASK (result), error);
}
/**
* fp_device_delete_print:
* @device: a #FpDevice
* @enrolled_print: a #FpPrint to delete
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: the function to call on completion
* @user_data: the data to pass to @callback
*
* Start an asynchronous operation to delete a print from the device.
* The callback will be called once the operation has finished. Retrieve
* the result with fp_device_delete_print_finish().
*
* This only makes sense on devices that store prints on-chip, but is safe
* to always call.
*/
void
fp_device_delete_print (FpDevice *device,
FpPrint *enrolled_print,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
FpDevicePrivate *priv = fp_device_get_instance_private (device);
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (device);
task = g_task_new (device, cancellable, callback, user_data);
if (g_task_return_error_if_cancelled (task))
return;
if (!priv->is_open)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_NOT_OPEN));
return;
}
if (priv->current_task)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_BUSY));
return;
}
/* Succeed immediately if delete is not implemented. */
if (!cls->delete || !(cls->features & FP_DEVICE_FEATURE_STORAGE_DELETE))
{
g_task_return_boolean (task, TRUE);
return;
}
priv->current_action = FPI_DEVICE_ACTION_DELETE;
priv->current_task = g_steal_pointer (&task);
maybe_cancel_on_cancelled (device, cancellable);
g_task_set_task_data (priv->current_task,
g_object_ref (enrolled_print),
g_object_unref);
cls->delete (device);
}
/**
* fp_device_delete_print_finish:
* @device: A #FpDevice
* @result: A #GAsyncResult
* @error: Return location for errors, or %NULL to ignore
*
* Finish an asynchronous operation to delete an enrolled print.
*
* See fp_device_delete_print().
*
* Returns: (type void): %FALSE on error, %TRUE otherwise
*/
gboolean
fp_device_delete_print_finish (FpDevice *device,
GAsyncResult *result,
GError **error)
{
return g_task_propagate_boolean (G_TASK (result), error);
}
/**
* fp_device_list_prints:
* @device: a #FpDevice
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: the function to call on completion
* @user_data: the data to pass to @callback
*
* Start an asynchronous operation to list all prints stored on the device.
* This only makes sense on devices that store prints on-chip.
*
* Retrieve the result with fp_device_list_prints_finish().
*/
void
fp_device_list_prints (FpDevice *device,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
FpDevicePrivate *priv = fp_device_get_instance_private (device);
FpDeviceClass *cls = FP_DEVICE_GET_CLASS (device);
task = g_task_new (device, cancellable, callback, user_data);
if (g_task_return_error_if_cancelled (task))
return;
if (!priv->is_open)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_NOT_OPEN));
return;
}
if (priv->current_task)
{
g_task_return_error (task,
fpi_device_error_new (FP_DEVICE_ERROR_BUSY));
return;
}
if (!cls->list || !(cls->features & FP_DEVICE_FEATURE_STORAGE))
{
g_task_return_error (task,
fpi_device_error_new_msg (FP_DEVICE_ERROR_NOT_SUPPORTED,
"Device has no storage"));
return;
}
priv->current_action = FPI_DEVICE_ACTION_LIST;
priv->current_task = g_steal_pointer (&task);
maybe_cancel_on_cancelled (device, cancellable);
cls->list (device);
}
/**
* fp_device_list_prints_finish:
* @device: A #FpDevice
* @result: A #GAsyncResult
* @error: Return location for errors, or %NULL to ignore
*
* Finish an asynchronous operation to list all device stored prints.
*
* See fp_device_list_prints().
*
* Returns: (element-type FpPrint) (transfer container): Array of prints or %NULL on error
*/
GPtrArray *
fp_device_list_prints_finish (FpDevice *device,
GAsyncResult *result,
GError **error)
{
return g_task_propagate_pointer (G_TASK (result), error);
}
static void
async_result_ready (GObject *source_object, GAsyncResult *res, gpointer user_data)
{
GTask **task = user_data;
*task = g_object_ref (G_TASK (res));
}
/**
* fp_device_open_sync:
* @device: a #FpDevice
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: Return location for errors, or %NULL to ignore
*
* Open the device synchronously.
*
* Returns: (type void): %FALSE on error, %TRUE otherwise
*/
gboolean
fp_device_open_sync (FpDevice *device,
GCancellable *cancellable,
GError **error)
{
g_autoptr(GAsyncResult) task = NULL;
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
fp_device_open (device, cancellable, async_result_ready, &task);
while (!task)
g_main_context_iteration (NULL, TRUE);
return fp_device_open_finish (device, task, error);
}
/**
* fp_device_close_sync:
* @device: a #FpDevice
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: Return location for errors, or %NULL to ignore
*
* Close the device synchronously.
*
* Returns: (type void): %FALSE on error, %TRUE otherwise
*/
gboolean
fp_device_close_sync (FpDevice *device,
GCancellable *cancellable,
GError **error)
{
g_autoptr(GAsyncResult) task = NULL;
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
fp_device_close (device, cancellable, async_result_ready, &task);
while (!task)
g_main_context_iteration (NULL, TRUE);
return fp_device_close_finish (device, task, error);
}
/**
* fp_device_enroll_sync:
* @device: a #FpDevice
* @template_print: (transfer floating): A #FpPrint to fill in or use
* as a template.
* @cancellable: (nullable): a #GCancellable, or %NULL
* @progress_cb: (nullable) (scope call): progress reporting callback
* @progress_data: user data for @progress_cb
* @error: Return location for errors, or %NULL to ignore
*
* Enroll a new print. See fp_device_enroll(). It is undefined whether
* @template_print is updated or a newly created #FpPrint is returned.
*
* Returns:(transfer full): A #FpPrint on success, %NULL otherwise
*/
FpPrint *
fp_device_enroll_sync (FpDevice *device,
FpPrint *template_print,
GCancellable *cancellable,
FpEnrollProgress progress_cb,
gpointer progress_data,
GError **error)
{
g_autoptr(GAsyncResult) task = NULL;
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
fp_device_enroll (device, template_print, cancellable,
progress_cb, progress_data, NULL,
async_result_ready, &task);
while (!task)
g_main_context_iteration (NULL, TRUE);
return fp_device_enroll_finish (device, task, error);
}
/**
* fp_device_verify_sync:
* @device: a #FpDevice
* @enrolled_print: a #FpPrint to verify
* @cancellable: (nullable): a #GCancellable, or %NULL
* @match_cb: (nullable) (scope call): match reporting callback
* @match_data: (closure match_cb): user data for @match_cb
* @match: (out): Whether the user presented the correct finger
* @print: (out) (transfer full) (nullable): Location to store the scanned print, or %NULL to ignore
* @error: Return location for errors, or %NULL to ignore
*
* Verify a given print synchronously.
*
* Returns: (type void): %FALSE on error, %TRUE otherwise
*/
gboolean
fp_device_verify_sync (FpDevice *device,
FpPrint *enrolled_print,
GCancellable *cancellable,
FpMatchCb match_cb,
gpointer match_data,
gboolean *match,
FpPrint **print,
GError **error)
{
g_autoptr(GAsyncResult) task = NULL;
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
fp_device_verify (device,
enrolled_print,
cancellable,
match_cb, match_data, NULL,
async_result_ready, &task);
while (!task)
g_main_context_iteration (NULL, TRUE);
return fp_device_verify_finish (device, task, match, print, error);
}
/**
* fp_device_identify_sync:
* @device: a #FpDevice
* @prints: (element-type FpPrint) (transfer none): #GPtrArray of #FpPrint
* @cancellable: (nullable): a #GCancellable, or %NULL
* @match_cb: (nullable) (scope call): match reporting callback
* @match_data: (closure match_cb): user data for @match_cb
* @match: (out) (transfer full) (nullable): Location for the matched #FpPrint, or %NULL
* @print: (out) (transfer full) (nullable): Location for the new #FpPrint, or %NULL
* @error: Return location for errors, or %NULL to ignore
*
* Identify a print synchronously.
*
* Returns: (type void): %FALSE on error, %TRUE otherwise
*/
gboolean
fp_device_identify_sync (FpDevice *device,
GPtrArray *prints,
GCancellable *cancellable,
FpMatchCb match_cb,
gpointer match_data,
FpPrint **match,
FpPrint **print,
GError **error)
{
g_autoptr(GAsyncResult) task = NULL;
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
fp_device_identify (device,
prints,
cancellable,
match_cb, match_data, NULL,
async_result_ready, &task);
while (!task)
g_main_context_iteration (NULL, TRUE);
return fp_device_identify_finish (device, task, match, print, error);
}
/**
* fp_device_capture_sync:
* @device: a #FpDevice
* @wait_for_finger: Whether to wait for a finger or not
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: Return location for errors, or %NULL to ignore
*
* Start an synchronous operation to capture an image.
*
* Returns: (transfer full): A new #FpImage or %NULL on error
*/
FpImage *
fp_device_capture_sync (FpDevice *device,
gboolean wait_for_finger,
GCancellable *cancellable,
GError **error)
{
g_autoptr(GAsyncResult) task = NULL;
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
fp_device_capture (device,
wait_for_finger,
cancellable,
async_result_ready, &task);
while (!task)
g_main_context_iteration (NULL, TRUE);
return fp_device_capture_finish (device, task, error);
}
/**
* fp_device_delete_print_sync:
* @device: a #FpDevice
* @enrolled_print: a #FpPrint to verify
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: Return location for errors, or %NULL to ignore
*
* Delete a given print from the device.
*
* Returns: %FALSE on error, %TRUE otherwise
*/
gboolean
fp_device_delete_print_sync (FpDevice *device,
FpPrint *enrolled_print,
GCancellable *cancellable,
GError **error)
{
g_autoptr(GAsyncResult) task = NULL;
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
fp_device_delete_print (device,
enrolled_print,
cancellable,
async_result_ready, &task);
while (!task)
g_main_context_iteration (NULL, TRUE);
return fp_device_delete_print_finish (device, task, error);
}
/**
* fp_device_list_prints_sync:
* @device: a #FpDevice
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: Return location for errors, or %NULL to ignore
*
* List device stored prints synchronously.
*
* Returns: (element-type FpPrint) (transfer container): Array of prints, or %NULL on error
*/
GPtrArray *
fp_device_list_prints_sync (FpDevice *device,
GCancellable *cancellable,
GError **error)
{
g_autoptr(GAsyncResult) task = NULL;
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
fp_device_list_prints (device,
NULL,
async_result_ready, &task);
while (!task)
g_main_context_iteration (NULL, TRUE);
return fp_device_list_prints_finish (device, task, error);
}
/**
* fp_device_get_features:
* @device: a #FpDevice
*
* Gets the #FpDeviceFeature's supported by the @device.
*
* Returns: #FpDeviceFeature flags of supported features
*/
FpDeviceFeature
fp_device_get_features (FpDevice *device)
{
g_return_val_if_fail (FP_IS_DEVICE (device), FP_DEVICE_FEATURE_NONE);
return FP_DEVICE_GET_CLASS (device)->features;
}
/**
* fp_device_has_feature:
* @device: a #FpDevice
* @feature: #FpDeviceFeature flags to check against device supported features
*
* Checks if @device supports the requested #FpDeviceFeature's.
* See fp_device_get_features()
*
* Returns: %TRUE if supported, %FALSE otherwise
*/
gboolean
fp_device_has_feature (FpDevice *device,
FpDeviceFeature feature)
{
g_return_val_if_fail (FP_IS_DEVICE (device), FALSE);
if (feature == FP_DEVICE_FEATURE_NONE)
return fp_device_get_features (device) == feature;
return (fp_device_get_features (device) & feature) == feature;
}
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