Similarly to b1ac865abd, downgrade
fp_err() to be non-fatal. A number of drivers would spit out an error
when encountering this call, but not crash, carry on and most of the
time recover.
Make sure we don't assert in those cases.
BUG() and BUG_ON() didn't use to assert, but only print an error if
debugging was enabled. This was hiding a lot of state bugs in drivers,
and transforming those into assertions causes crashes.
Downgrade the assertion to only print a warning, and hope that those
eventually get fixed in the drivers so we can re-enable them.
Closes: #77
The driver will at least need to close its hardware resources, and
free memory, so it must have had one.
This case was never actually used as can be seen from the fact that
we would assert in fpi_drvcb_close_complete() if the state was wrong
but never set it to the expected value.
Which avoids passing zero lines to fpi_assemble_lines()
"gmem.c:130: failed to allocate 18446744073709551612 bytes"
#3 0x00007fe4f6ef428f in g_log (log_domain=log_domain@entry=0x7fe4f6f3506e "GLib", log_level=log_level@entry=G_LOG_LEVEL_ERROR, format=format@entry=0x7fe4f6f3e610 "%s: failed to allocate %lu bytes") at gmessages.c:1398
#4 0x00007fe4f6ef2ac4 in g_malloc0 (n_bytes=n_bytes@entry=18446744073709551612) at gmem.c:129
#5 0x00007fe4f8052020 in median_filter (filtersize=25, size=-1, data=0x0) at assembling.c:309
#6 fpi_assemble_lines (ctx=ctx@entry=0x7fe4f82ac3c0 <assembling_ctx>, lines=0x0, lines_len=0) at assembling.c:389
#7 0x00007fe4f805f3db in submit_image (ssm=ssm@entry=0x16c3cba360, data=data@entry=0x16c3cb9cc0) at drivers/vfs5011.c:412
See https://bugzilla.redhat.com/show_bug.cgi?id=1484812Closes: #42
Every frame stores the delta from the previous frame, in reverse mode
it stores the delta to the next frame. This causes images to use the
wrong delta while assembling in forward mode.
The broken assembling in forward mode will create a small error for
linear motion, because the delta of all frames is approximately the
same in this case. But if you move your finger, stop and then continue
moving in a single scan, the misplaced frames should be visible in
the assembled output.
This could result in false positives and verification failing.
https://bugs.freedesktop.org/show_bug.cgi?id=105027
