mirrors/libfprint
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/libfprint/libfprint.git synced 2025-11-15 07:38:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

Improve print_data structure and on-disk format

Browse Source 
Drivers now have an ID number. These will be assigned by me and documented
on the wiki. 0 cannot be used.

Drivers now define a devtype for each device they initialise. This is to
cope with the situation where a driver can support varying devices where
their print data is incompatible (i.e. image scaling is totally changed).
This doesn't apply to any existing supported devices.

Print data no longer includes driver name, and includes driver ID instead.

Paths to saved print data now include driver ID and devtype, and no longer
include driver name.

APIs exposed for converting a print_data into a blob which can then
be loaded back again later. Useful for systems who don't want to use
my simple storage system (which is only aimed at a single user).

File format is now defined and will be documented on the wiki. The header
is larger as we can no longer rely on directory paths in all scenarios.

Print data compat check now checks devtype and driver ID.
This commit is contained in:
Daniel Drake
2007-10-28 22:02:04 +00:00
parent 4e5cfdf92a
commit 294f9ad447
10 changed files with 210 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
libfprint/img.c
View File

@@ -243,7 +243,8 @@ int fpi_img_detect_minutiae(struct fp_img_dev *imgdev, struct fp_img *img,
/* FIXME: space is wasted if we dont hit the max minutiae count. would
* be good to make this dynamic. */
print = fpi_print_data_new(imgdev->dev, sizeof(struct xyt_struct));
minutiae_to_xyt(minutiae, bw, bh, print->buffer);
print->type = PRINT_DATA_NBIS_MINUTIAE;
minutiae_to_xyt(minutiae, bw, bh, print->data);
/* FIXME: the print buffer at this point is endian-specific, and will
* only work when loaded onto machines with identical endianness. not good!
* data format should be platform-independant. */
@@ -263,11 +264,17 @@ int fpi_img_detect_minutiae(struct fp_img_dev *imgdev, struct fp_img *img,
int fpi_img_compare_print_data(struct fp_print_data *enrolled_print,
struct fp_print_data *new_print)
{
struct xyt_struct *gstruct = (struct xyt_struct *) enrolled_print->buffer;
struct xyt_struct *pstruct = (struct xyt_struct *) new_print->buffer;
struct xyt_struct *gstruct = (struct xyt_struct *) enrolled_print->data;
struct xyt_struct *pstruct = (struct xyt_struct *) new_print->data;
GTimer *timer;
int r;
if (enrolled_print->type != PRINT_DATA_NBIS_MINUTIAE ||
new_print->type != PRINT_DATA_NBIS_MINUTIAE) {
fp_err("invalid print format");
return -EINVAL;
}
timer = g_timer_new();
r = bozorth_main(pstruct, gstruct);
g_timer_stop(timer);