for d, mfg, mdl, t in devices:
if d == device_uri:
break
else:
log.error(
"Unable to locate device %s using SANE backend hpaio:. Please check HPLIP installation."
% device_uri)
sys.exit(1)
log.info(log.bold("Using device %s" % device_uri))
log.info("Opening connection to device...")
try:
device = sane.openDevice(device_uri)
except scanext.error, e:
sane.reportError(e)
sys.exit(1)
tlx = device.getOptionObj('tl-x').limitAndSet(tlx)
tly = device.getOptionObj('tl-y').limitAndSet(tly)
brx = device.getOptionObj('br-x').limitAndSet(brx)
bry = device.getOptionObj('br-y').limitAndSet(bry)
scan_area = (brx - tlx) * (bry - tly) # mm^2
scan_px = scan_area * res * res / 645.16 # res is in DPI
valid_res = device.getOptionObj('resolution').constraint
log.debug("Device supported resolutions %s" % valid_res)
if res not in valid_res:
log.warn(
"Invalid resolution. Using closest valid resolution of %d dpi"
# Make sure SANE backend sees the device...
for d, mfg, mdl, t in devices:
if d == device_uri:
break
else:
log.error("Unable to locate device %s using SANE backend hpaio:. Please check HPLIP installation." % device_uri)
sys.exit(1)
log.info(log.bold("Using device %s" % device_uri))
log.info("Opening connection to device...")
try:
device = sane.openDevice(device_uri)
except scanext.error as e:
sane.reportError(e.args[0])
sys.exit(1)
try:
source_option = device.getOptionObj("source").constraint
log.debug("Supported source Options: %s size=%d" % (source_option,len(source_option)))
if source_option is None:
log.error("Device doesn't have scanner.")
sys.exit(1)
except:
log.error("Failed to get the source from device.")
#check if device has only ADF
if len(source_option) == 1 and 'ADF' in source_option:
log.debug("Device has only ADF support")
adf = True
# Make sure SANE backend sees the device...
for d, mfg, mdl, t in devices:
if d == device_uri:
break
else:
log.error("Unable to locate device %s using SANE backend hpaio:. Please check HPLIP installation." % device_uri)
sys.exit(1)
log.info(log.bold("Using device %s" % device_uri))
log.info("Opening connection to device...")
try:
device = sane.openDevice(device_uri)
except scanext.error, e:
sane.reportError(e)
sys.exit(1)
tlx = device.getOptionObj('tl-x').limitAndSet(tlx)
tly = device.getOptionObj('tl-y').limitAndSet(tly)
brx = device.getOptionObj('br-x').limitAndSet(brx)
bry = device.getOptionObj('br-y').limitAndSet(bry)
scan_area = (brx - tlx) * (bry - tly) # mm^2
scan_px = scan_area * res * res / 645.16 # res is in DPI
valid_res = device.getOptionObj('resolution').constraint
log.debug("Device supported resolutions %s" % (valid_res,))
if 0 in valid_res: #min-max range in tuple
if res < valid_res[0] or res > valid_res[1]:
log.warn("Invalid resolution. Using closest valid resolution of %d dpi" % res)
# Make sure SANE backend sees the device...
for d, mfg, mdl, t in devices:
if d == device_uri:
break
else:
log.error("Unable to locate device %s using SANE backend hpaio:. Please check HPLIP installation." % device_uri)
sys.exit(1)
log.info(log.bold("Using device %s" % device_uri))
log.info("Opening connection to device...")
try:
device = sane.openDevice(device_uri)
except scanext.error as e:
sane.reportError(e.args[0])
sys.exit(1)
try:
source_option = device.getOptionObj("source").constraint
log.debug("Supported source Options: %s size=%d" % (source_option,len(source_option)))
if source_option is None:
log.error("Device doesn't have scanner.")
sys.exit(1)
except:
log.error("Failed to get the source from device.")
#check if device has only ADF
if len(source_option) == 1 and 'ADF' in source_option:
log.debug("Device has only ADF support")
adf = True