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Return images through enroll/verify path

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Added new API functions to obtain images, even when scans are bad, perhaps
a useful way to show the user just how good/bad the scan actually was.

Drivers and examples updated accordingly.
This commit is contained in:
Daniel Drake
2007-11-13 20:46:15 +00:00
parent a86cd51959
commit 5485f8031d
10 changed files with 115 additions and 26 deletions
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37
libfprint/fprint.h
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@@ -128,7 +128,25 @@ enum fp_enroll_result {
FP_ENROLL_RETRY_REMOVE_FINGER,
};
int fp_enroll_finger(struct fp_dev *dev, struct fp_print_data **print_data);
int fp_enroll_finger_img(struct fp_dev *dev, struct fp_print_data **print_data,
struct fp_img **img);
/** \ingroup dev
* Performs an enroll stage. See \ref enrolling for an explanation of enroll
* stages. This function is just a shortcut to calling fp_enroll_finger_img()
* with a NULL image parameter. Be sure to read the description of
* fp_enroll_finger_img() in order to understand its behaviour.
*
* \param dev the device
* \param print_data a location to return the resultant enrollment data from
* the final stage. Must be freed with fp_print_data_free() after use.
* \return negative code on error, otherwise a code from #fp_enroll_result
*/
static inline int fp_enroll_finger(struct fp_dev *dev,
struct fp_print_data **print_data)
{
return fp_enroll_finger_img(dev, print_data, NULL);
}
/** \ingroup dev
* Verification result codes returned from fp_verify_finger().
@@ -158,7 +176,22 @@ enum fp_verify_result {
FP_VERIFY_RETRY_REMOVE_FINGER = FP_ENROLL_RETRY_REMOVE_FINGER,
};
int fp_verify_finger(struct fp_dev *dev, struct fp_print_data *enrolled_print);
int fp_verify_finger_img(struct fp_dev *dev,
struct fp_print_data *enrolled_print, struct fp_img **img);
/** \ingroup dev
* Performs a new scan and verify it against a previously enrolled print.
* \param dev the device to perform the scan.
* \param enrolled_print the print to verify against. Must have been previously
* enrolled with a device compatible to the device selected to perform the scan.
* \return negative code on error, otherwise a code from #fp_verify_result
* \sa fp_verify_finger_img()
*/
static inline int fp_verify_finger(struct fp_dev *dev,
struct fp_print_data *enrolled_print)
{
return fp_verify_finger_img(dev, enrolled_print, NULL);
}
/* Data handling */
int fp_print_data_load(struct fp_dev *dev, enum fp_finger finger,