second attempt.
----- Original Message -----
From: Norbert Schade
To: UPD group
Sent: Monday, January 12, 2004 11:27 AM
Subject: DeviceFeature
The attribute has been moved up a level from the feature records to the feature level.
We still want to offer a chance to provide consistent text strings of common driver features, even if they are not supported by the device, but are common use (e.g. N-Up, driver collation).
Advantage:
A driver is supposed to check, if a feature is a device feature. If it's not the driver has to check, if it can provide functionality for that specific feature (e.g. is the driver able to do N-Up on the host?). If the driver is not able, it cannot show that specific feature in a driver's user interface.
In the past it was necessary to check each single record. This could have slowed down the performance of a driver.
Now the first check is on feature level only. Very quick. If DeviceFeature is set to 'false', at least on record is to be expected, which will require the driver to emulate the functionality on the host.
The basic philosophy of attribute DeviceFeature is unchanged.
Regards
Norbert Schade
Norbert Schade
69 Prescott Drive
North Chelmsford
MA 01863
phone: 1-978-251-1017
email: norbertschade at comcast.net
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