/*
* FpImageDevice - An image based fingerprint reader device - Private APIs
* Copyright (C) 2019 Benjamin Berg <bberg@redhat.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 "image_device"
#include "fpi-log.h"
#include "fp-image-device-private.h"
#include "fp-image-device.h"
/**
* SECTION: fpi-image-device
* @title: Internal FpImageDevice
* @short_description: Internal image device functions
*
* Internal image device functions. See #FpImageDevice for public routines.
*/
/* Manually redefine what G_DEFINE_* macro does */
static inline gpointer
fp_image_device_get_instance_private (FpImageDevice *self)
{
FpImageDeviceClass *img_class = g_type_class_peek_static (FP_TYPE_IMAGE_DEVICE);
return G_STRUCT_MEMBER_P (self,
g_type_class_get_instance_private_offset (img_class));
}
static void fp_image_device_change_state (FpImageDevice *self,
FpiImageDeviceState state);
/* Private shared functions */
void
fpi_image_device_activate (FpImageDevice *self)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
FpImageDeviceClass *cls = FP_IMAGE_DEVICE_GET_CLASS (self);
g_assert (!priv->active);
fp_dbg ("Activating image device");
fp_image_device_change_state (self, FPI_IMAGE_DEVICE_STATE_ACTIVATING);
cls->activate (self);
}
void
fpi_image_device_deactivate (FpImageDevice *self, gboolean cancelling)
{
FpDevice *device = FP_DEVICE (self);
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
FpImageDeviceClass *cls = FP_IMAGE_DEVICE_GET_CLASS (device);
if (!priv->active || priv->state == FPI_IMAGE_DEVICE_STATE_DEACTIVATING)
{
/* XXX: We currently deactivate both from minutiae scan result
* and finger off report. */
fp_dbg ("Already deactivated, ignoring request.");
return;
}
if (!cancelling && priv->state != FPI_IMAGE_DEVICE_STATE_IDLE)
g_warning ("Deactivating image device while it is not idle, this should not happen.");
fp_dbg ("Deactivating image device");
fp_image_device_change_state (self, FPI_IMAGE_DEVICE_STATE_DEACTIVATING);
cls->deactivate (self);
}
/* Static helper functions */
/* This should not be called directly to activate/deactivate the device! */
static void
fp_image_device_change_state (FpImageDevice *self, FpiImageDeviceState state)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
g_autofree char *prev_state_str = NULL;
g_autofree char *state_str = NULL;
gboolean transition_is_valid = FALSE;
gint i;
struct
{
FpiImageDeviceState from;
FpiImageDeviceState to;
} valid_transitions[] = {
{ FPI_IMAGE_DEVICE_STATE_INACTIVE, FPI_IMAGE_DEVICE_STATE_ACTIVATING },
{ FPI_IMAGE_DEVICE_STATE_ACTIVATING, FPI_IMAGE_DEVICE_STATE_IDLE },
{ FPI_IMAGE_DEVICE_STATE_ACTIVATING, FPI_IMAGE_DEVICE_STATE_INACTIVE },
{ FPI_IMAGE_DEVICE_STATE_IDLE, FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_ON },
{ FPI_IMAGE_DEVICE_STATE_IDLE, FPI_IMAGE_DEVICE_STATE_CAPTURE }, /* raw mode -- currently not supported */
{ FPI_IMAGE_DEVICE_STATE_IDLE, FPI_IMAGE_DEVICE_STATE_DEACTIVATING },
{ FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_ON, FPI_IMAGE_DEVICE_STATE_CAPTURE },
{ FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_ON, FPI_IMAGE_DEVICE_STATE_DEACTIVATING }, /* cancellation */
{ FPI_IMAGE_DEVICE_STATE_CAPTURE, FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_OFF },
{ FPI_IMAGE_DEVICE_STATE_CAPTURE, FPI_IMAGE_DEVICE_STATE_IDLE }, /* raw mode -- currently not supported */
{ FPI_IMAGE_DEVICE_STATE_CAPTURE, FPI_IMAGE_DEVICE_STATE_DEACTIVATING }, /* cancellation */
{ FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_OFF, FPI_IMAGE_DEVICE_STATE_IDLE },
{ FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_OFF, FPI_IMAGE_DEVICE_STATE_DEACTIVATING }, /* cancellation */
{ FPI_IMAGE_DEVICE_STATE_DEACTIVATING, FPI_IMAGE_DEVICE_STATE_INACTIVE },
};
prev_state_str = g_enum_to_string (FPI_TYPE_IMAGE_DEVICE_STATE, priv->state);
state_str = g_enum_to_string (FPI_TYPE_IMAGE_DEVICE_STATE, state);
fp_dbg ("Image device internal state change from %s to %s",
prev_state_str, state_str);
for (i = 0; i < G_N_ELEMENTS (valid_transitions); i++)
{
if (valid_transitions[i].from == priv->state && valid_transitions[i].to == state)
{
transition_is_valid = TRUE;
break;
}
}
if (!transition_is_valid)
g_warning ("Internal state machine issue: transition from %s to %s should not happen!",
prev_state_str, state_str);
priv->state = state;
g_object_notify (G_OBJECT (self), "fpi-image-device-state");
g_signal_emit_by_name (self, "fpi-image-device-state-changed", priv->state);
if (state == FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_ON)
{
fpi_device_report_finger_status_changes (FP_DEVICE (self),
FP_FINGER_STATUS_NEEDED,
FP_FINGER_STATUS_NONE);
}
else if (state == FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_OFF)
{
fpi_device_report_finger_status_changes (FP_DEVICE (self),
FP_FINGER_STATUS_NONE,
FP_FINGER_STATUS_NEEDED);
}
}
static void
fp_image_device_enroll_maybe_await_finger_on (FpImageDevice *self)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
/* We wait for both the minutiae scan to complete and the finger to
* be removed before we switch to AWAIT_FINGER_ON. */
if (priv->minutiae_scan_active || priv->finger_present)
return;
fp_image_device_change_state (self, FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_ON);
}
static void
fp_image_device_maybe_complete_action (FpImageDevice *self, GError *error)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
FpDevice *device = FP_DEVICE (self);
FpiDeviceAction action;
if (error)
{
/* Keep the first error we encountered, but not if it is of type retry */
if (priv->action_error && !(priv->action_error->domain == FP_DEVICE_RETRY))
{
g_warning ("Will complete with first error, new error was: %s", error->message);
g_clear_error (&error);
}
else
{
g_clear_error (&priv->action_error);
priv->action_error = error;
}
}
/* Do not complete if the device is still active or a minutiae scan is pending. */
if (priv->active || priv->minutiae_scan_active)
return;
if (!priv->action_error)
g_cancellable_set_error_if_cancelled (fpi_device_get_cancellable (device), &priv->action_error);
if (priv->action_error)
{
fpi_device_action_error (device, g_steal_pointer (&priv->action_error));
g_clear_object (&priv->capture_image);
return;
}
/* We are done, report the result. */
action = fpi_device_get_current_action (FP_DEVICE (self));
if (action == FPI_DEVICE_ACTION_ENROLL)
{
FpPrint *enroll_print;
fpi_device_get_enroll_data (device, &enroll_print);
fpi_device_enroll_complete (device, g_object_ref (enroll_print), NULL);
}
else if (action == FPI_DEVICE_ACTION_VERIFY)
{
fpi_device_verify_complete (device, NULL);
}
else if (action == FPI_DEVICE_ACTION_IDENTIFY)
{
fpi_device_identify_complete (device, NULL);
}
else if (action == FPI_DEVICE_ACTION_CAPTURE)
{
fpi_device_capture_complete (device, g_steal_pointer (&priv->capture_image), NULL);
}
else
{
g_assert_not_reached ();
}
}
static void
fpi_image_device_minutiae_detected (GObject *source_object, GAsyncResult *res, gpointer user_data)
{
g_autoptr(FpImage) image = FP_IMAGE (source_object);
g_autoptr(FpPrint) print = NULL;
GError *error = NULL;
FpImageDevice *self = FP_IMAGE_DEVICE (user_data);
FpDevice *device = FP_DEVICE (self);
FpImageDevicePrivate *priv;
FpiDeviceAction action;
/* Note: We rely on the device to not disappear during an operation. */
priv = fp_image_device_get_instance_private (FP_IMAGE_DEVICE (device));
priv->minutiae_scan_active = FALSE;
if (!fp_image_detect_minutiae_finish (image, res, &error))
{
/* Cancel operation . */
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
{
fp_image_device_maybe_complete_action (self, g_steal_pointer (&error));
fpi_image_device_deactivate (self, TRUE);
return;
}
/* Replace error with a retry condition. */
g_warning ("Failed to detect minutiae: %s", error->message);
g_clear_pointer (&error, g_error_free);
error = fpi_device_retry_new_msg (FP_DEVICE_RETRY_GENERAL, "Minutiae detection failed, please retry");
}
action = fpi_device_get_current_action (device);
if (action == FPI_DEVICE_ACTION_CAPTURE)
{
priv->capture_image = g_steal_pointer (&image);
fp_image_device_maybe_complete_action (self, g_steal_pointer (&error));
return;
}
if (!error)
{
print = fp_print_new (device);
fpi_print_set_type (print, FPI_PRINT_NBIS);
if (!fpi_print_add_from_image (print, image, &error))
{
g_clear_object (&print);
if (error->domain != FP_DEVICE_RETRY)
{
fp_image_device_maybe_complete_action (self, g_steal_pointer (&error));
/* We might not yet be deactivating, if we are enrolling. */
fpi_image_device_deactivate (self, TRUE);
return;
}
}
}
if (action == FPI_DEVICE_ACTION_ENROLL)
{
FpPrint *enroll_print;
fpi_device_get_enroll_data (device, &enroll_print);
if (print)
{
fpi_print_add_print (enroll_print, print);
priv->enroll_stage += 1;
}
fpi_device_enroll_progress (device, priv->enroll_stage,
g_steal_pointer (&print), error);
/* Start another scan or deactivate. */
if (priv->enroll_stage == IMG_ENROLL_STAGES)
{
fp_image_device_maybe_complete_action (self, g_steal_pointer (&error));
fpi_image_device_deactivate (self, FALSE);
}
else
{
fp_image_device_enroll_maybe_await_finger_on (FP_IMAGE_DEVICE (device));
}
}
else if (action == FPI_DEVICE_ACTION_VERIFY)
{
FpPrint *template;
FpiMatchResult result;
fpi_device_get_verify_data (device, &template);
if (print)
result = fpi_print_bz3_match (template, print, priv->bz3_threshold, &error);
else
result = FPI_MATCH_ERROR;
if (!error || error->domain == FP_DEVICE_RETRY)
fpi_device_verify_report (device, result, g_steal_pointer (&print), g_steal_pointer (&error));
fp_image_device_maybe_complete_action (self, g_steal_pointer (&error));
}
else if (action == FPI_DEVICE_ACTION_IDENTIFY)
{
gint i;
GPtrArray *templates;
FpPrint *result = NULL;
fpi_device_get_identify_data (device, &templates);
for (i = 0; !error && i < templates->len; i++)
{
FpPrint *template = g_ptr_array_index (templates, i);
if (fpi_print_bz3_match (template, print, priv->bz3_threshold, &error) == FPI_MATCH_SUCCESS)
{
result = template;
break;
}
}
if (!error || error->domain == FP_DEVICE_RETRY)
fpi_device_identify_report (device, result, g_steal_pointer (&print), g_steal_pointer (&error));
fp_image_device_maybe_complete_action (self, g_steal_pointer (&error));
}
else
{
/* XXX: This can be hit currently due to a race condition in the enroll code!
* In that case we scan a further image even though the minutiae for the previous
* one have not yet been detected.
* We need to keep track on the pending minutiae detection and the fact that
* it will finish eventually (or we may need to retry on error and activate the
* device again). */
g_assert_not_reached ();
}
}
/*********************************************************/
/* Private API */
/**
* fpi_image_device_set_bz3_threshold:
* @self: a #FpImageDevice imaging fingerprint device
* @bz3_threshold: BZ3 threshold to use
*
* Dynamically adjust the bz3 threshold. This is only needed for drivers
* that support devices with different properties. It should generally be
* called from the probe callback, but is acceptable to call from the open
* callback.
*/
void
fpi_image_device_set_bz3_threshold (FpImageDevice *self,
gint bz3_threshold)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
g_return_if_fail (FP_IS_IMAGE_DEVICE (self));
g_return_if_fail (bz3_threshold > 0);
priv->bz3_threshold = bz3_threshold;
}
/**
* fpi_image_device_report_finger_status:
* @self: a #FpImageDevice imaging fingerprint device
* @present: whether the finger is present on the sensor
*
* Reports from the driver whether the user's finger is on
* the sensor.
*/
void
fpi_image_device_report_finger_status (FpImageDevice *self,
gboolean present)
{
FpDevice *device = FP_DEVICE (self);
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
FpiDeviceAction action;
if (present)
{
fpi_device_report_finger_status_changes (device,
FP_FINGER_STATUS_PRESENT,
FP_FINGER_STATUS_NONE);
}
else
{
fpi_device_report_finger_status_changes (device,
FP_FINGER_STATUS_NONE,
FP_FINGER_STATUS_PRESENT);
}
if (priv->state == FPI_IMAGE_DEVICE_STATE_INACTIVE)
{
/* Do we really want to always ignore such reports? We could
* also track the state in case the user had the finger on
* the device at initialisation time and the driver reports
* this early.
*/
g_debug ("Ignoring finger presence report as the device is not active!");
return;
}
action = fpi_device_get_current_action (device);
g_assert (action != FPI_DEVICE_ACTION_OPEN);
g_assert (action != FPI_DEVICE_ACTION_CLOSE);
g_debug ("Image device reported finger status: %s", present ? "on" : "off");
priv->finger_present = present;
if (present && priv->state == FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_ON)
{
fp_image_device_change_state (self, FPI_IMAGE_DEVICE_STATE_CAPTURE);
}
else if (!present && priv->state == FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_OFF)
{
/* If we are in the non-enroll case, we always deactivate.
*
* In the enroll case, the decision can only be made after minutiae
* detection has finished.
*/
fp_image_device_change_state (self, FPI_IMAGE_DEVICE_STATE_IDLE);
if (action != FPI_DEVICE_ACTION_ENROLL)
fpi_image_device_deactivate (self, FALSE);
else
fp_image_device_enroll_maybe_await_finger_on (self);
}
}
/**
* fpi_image_device_image_captured:
* @self: a #FpImageDevice imaging fingerprint device
* @image: whether the finger is present on the sensor
*
* Reports an image capture. Only use this function if the image was
* captured successfully. If there was an issue where the user should
* retry, use fpi_image_device_retry_scan() to report the retry condition.
*
* In the event of a fatal error for the operation use
* fpi_image_device_session_error(). This will abort the entire operation
* including e.g. an enroll operation which captures multiple images during
* one session.
*/
void
fpi_image_device_image_captured (FpImageDevice *self, FpImage *image)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
FpiDeviceAction action;
action = fpi_device_get_current_action (FP_DEVICE (self));
g_return_if_fail (image != NULL);
g_return_if_fail (priv->state == FPI_IMAGE_DEVICE_STATE_CAPTURE);
g_return_if_fail (action == FPI_DEVICE_ACTION_ENROLL ||
action == FPI_DEVICE_ACTION_VERIFY ||
action == FPI_DEVICE_ACTION_IDENTIFY ||
action == FPI_DEVICE_ACTION_CAPTURE);
g_debug ("Image device captured an image");
priv->minutiae_scan_active = TRUE;
/* XXX: We also detect minutiae in capture mode, we solely do this
* to normalize the image which will happen as a by-product. */
fp_image_detect_minutiae (image,
fpi_device_get_cancellable (FP_DEVICE (self)),
fpi_image_device_minutiae_detected,
self);
/* XXX: This is wrong if we add support for raw capture mode. */
fp_image_device_change_state (self, FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_OFF);
}
/**
* fpi_image_device_retry_scan:
* @self: a #FpImageDevice imaging fingerprint device
* @retry: The #FpDeviceRetry error code to report
*
* Reports a scan failure to the user. This may or may not abort the
* current session. It is the equivalent of fpi_image_device_image_captured()
* in the case of a retryable error condition (e.g. short swipe).
*/
void
fpi_image_device_retry_scan (FpImageDevice *self, FpDeviceRetry retry)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
FpiDeviceAction action;
GError *error;
action = fpi_device_get_current_action (FP_DEVICE (self));
/* We might be waiting for a finger at this point, so just accept
* all but INACTIVE */
g_return_if_fail (priv->state != FPI_IMAGE_DEVICE_STATE_INACTIVE);
g_return_if_fail (action == FPI_DEVICE_ACTION_ENROLL ||
action == FPI_DEVICE_ACTION_VERIFY ||
action == FPI_DEVICE_ACTION_IDENTIFY ||
action == FPI_DEVICE_ACTION_CAPTURE);
error = fpi_device_retry_new (retry);
if (action == FPI_DEVICE_ACTION_ENROLL)
{
g_debug ("Reporting retry during enroll");
fpi_device_enroll_progress (FP_DEVICE (self), priv->enroll_stage, NULL, error);
fp_image_device_change_state (self, FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_OFF);
}
else if (action == FPI_DEVICE_ACTION_VERIFY)
{
fpi_device_verify_report (FP_DEVICE (self), FPI_MATCH_ERROR, NULL, error);
fp_image_device_maybe_complete_action (self, NULL);
fpi_image_device_deactivate (self, TRUE);
}
else if (action == FPI_DEVICE_ACTION_IDENTIFY)
{
fpi_device_identify_report (FP_DEVICE (self), NULL, NULL, error);
fp_image_device_maybe_complete_action (self, NULL);
fpi_image_device_deactivate (self, TRUE);
}
else
{
/* The capture case where there is no early reporting. */
g_debug ("Abort current operation due to retry (no early-reporting)");
fp_image_device_maybe_complete_action (self, error);
fpi_image_device_deactivate (self, TRUE);
}
}
/**
* fpi_image_device_session_error:
* @self: a #FpImageDevice imaging fingerprint device
* @error: The #GError to report
*
* Report an error while interacting with the device. This effectively
* aborts the current ongoing action. Note that doing so will result in
* the deactivation handler to be called and this function must not be
* used to report an error during deactivation.
*/
void
fpi_image_device_session_error (FpImageDevice *self, GError *error)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
g_return_if_fail (self);
if (!error)
{
g_warning ("Driver did not provide an error, generating a generic one");
error = g_error_new (FP_DEVICE_ERROR, FP_DEVICE_ERROR_GENERAL, "Driver reported session error without an error");
}
if (!priv->active)
{
FpiDeviceAction action = fpi_device_get_current_action (FP_DEVICE (self));
g_warning ("Driver reported session error, but device is inactive.");
if (action != FPI_DEVICE_ACTION_NONE)
{
g_warning ("Translating to activation failure!");
fpi_image_device_activate_complete (self, error);
return;
}
}
else if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED) &&
fpi_device_action_is_cancelled (FP_DEVICE (self)))
{
/* Ignore cancellation errors here, as we will explicitly deactivate
* anyway (or, may already have done so at this point).
*/
g_debug ("Driver reported a cancellation error, this is expected but not required. Ignoring.");
g_clear_error (&error);
return;
}
else if (priv->state == FPI_IMAGE_DEVICE_STATE_INACTIVE)
{
g_warning ("Driver reported session error while deactivating already, ignoring. This indicates a driver bug.");
g_clear_error (&error);
return;
}
if (error->domain == FP_DEVICE_RETRY)
g_warning ("Driver should report retries using fpi_image_device_retry_scan!");
fp_image_device_maybe_complete_action (self, error);
fpi_image_device_deactivate (self, TRUE);
}
/**
* fpi_image_device_activate_complete:
* @self: a #FpImageDevice imaging fingerprint device
* @error: A #GError or %NULL on success
*
* Reports completion of device activation.
*/
void
fpi_image_device_activate_complete (FpImageDevice *self, GError *error)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
FpiDeviceAction action;
action = fpi_device_get_current_action (FP_DEVICE (self));
g_return_if_fail (priv->active == FALSE);
g_return_if_fail (priv->state == FPI_IMAGE_DEVICE_STATE_ACTIVATING);
g_return_if_fail (action == FPI_DEVICE_ACTION_ENROLL ||
action == FPI_DEVICE_ACTION_VERIFY ||
action == FPI_DEVICE_ACTION_IDENTIFY ||
action == FPI_DEVICE_ACTION_CAPTURE);
if (error)
{
g_debug ("Image device activation failed");
fpi_device_action_error (FP_DEVICE (self), error);
return;
}
g_debug ("Image device activation completed");
priv->active = TRUE;
/* We always want to capture at this point, move to AWAIT_FINGER
* state. */
fp_image_device_change_state (self, FPI_IMAGE_DEVICE_STATE_IDLE);
fp_image_device_change_state (self, FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_ON);
}
/**
* fpi_image_device_deactivate_complete:
* @self: a #FpImageDevice imaging fingerprint device
* @error: A #GError or %NULL on success
*
* Reports completion of device deactivation.
*/
void
fpi_image_device_deactivate_complete (FpImageDevice *self, GError *error)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
g_return_if_fail (priv->active == TRUE);
g_return_if_fail (priv->state == FPI_IMAGE_DEVICE_STATE_DEACTIVATING);
g_debug ("Image device deactivation completed");
priv->active = FALSE;
/* Assume finger was removed. */
priv->finger_present = FALSE;
fp_image_device_change_state (self, FPI_IMAGE_DEVICE_STATE_INACTIVE);
fp_image_device_maybe_complete_action (self, error);
}
/**
* fpi_image_device_open_complete:
* @self: a #FpImageDevice imaging fingerprint device
* @error: A #GError or %NULL on success
*
* Reports completion of open operation.
*/
void
fpi_image_device_open_complete (FpImageDevice *self, GError *error)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
FpiDeviceAction action;
action = fpi_device_get_current_action (FP_DEVICE (self));
g_return_if_fail (priv->active == FALSE);
g_return_if_fail (action == FPI_DEVICE_ACTION_OPEN);
g_debug ("Image device open completed");
priv->state = FPI_IMAGE_DEVICE_STATE_INACTIVE;
g_object_notify (G_OBJECT (self), "fpi-image-device-state");
fpi_device_report_finger_status (FP_DEVICE (self), FP_FINGER_STATUS_NONE);
fpi_device_open_complete (FP_DEVICE (self), error);
}
/**
* fpi_image_device_close_complete:
* @self: a #FpImageDevice imaging fingerprint device
* @error: A #GError or %NULL on success
*
* Reports completion of close operation.
*/
void
fpi_image_device_close_complete (FpImageDevice *self, GError *error)
{
FpImageDevicePrivate *priv = fp_image_device_get_instance_private (self);
FpiDeviceAction action;
action = fpi_device_get_current_action (FP_DEVICE (self));
g_debug ("Image device close completed");
g_return_if_fail (priv->active == FALSE);
g_return_if_fail (action == FPI_DEVICE_ACTION_CLOSE);
priv->state = FPI_IMAGE_DEVICE_STATE_INACTIVE;
g_object_notify (G_OBJECT (self), "fpi-image-device-state");
fpi_device_close_complete (FP_DEVICE (self), error);
}