WIA scanner driver doubt - Last attempt

NTDEV
1

Hi guys,

I have asked the question here before, just trying again before i attempt
for a paid Microsoft technical incident or so.

We are developing a WIA scanner minidriver. The scan UI is supplied by
Microsoft components. There is a “Preview” button and “Scan” button in the
UI.

  1. Preview is supposed to be faster - so we need to identify that in the
    Minidriver. There is a property called “WIA_DPS_PREVIEW” which has two
    values - “DPS_PREVIEW_SCAN and DPS_FINAL_SCAN”. Wia UI is supposed to set
    DPS_PREVIEW_SCAN when the user clicks the “Preview” button in the UI. But
    that it is not happening.

  2. Also Preview image is appearing as vertically flipped for us.

The same two bugs exist in Microsoft sample code in DDK also
\ddk\src\wdm\wia\wiascanr

I would like to know whether there is any mail id in Microsoft where i can
query this problem. I just want to know whether this bug exists in WIA
scanner UI. If not whether it is possible to get a updated sample driver or
information. The first question answer itself might help me.

regards,
Anoop

2

Anoop,

  1. Preview is supposed to be faster - so we need to identify that in the
    Minidriver. There is a property called “WIA_DPS_PREVIEW” which has two
    values - “DPS_PREVIEW_SCAN and DPS_FINAL_SCAN”. Wia UI is supposed to set
    DPS_PREVIEW_SCAN when the user clicks the “Preview” button in the UI. But
    that it is not happening.

I guess you need this to differentiate between Preview and Scan operations.
This can be achieved by checking PMINIDRV_TRANSFER_CONTEXT.tymed .

  1. Also Preview image is appearing as vertically flipped for us.
    You need to flip the raw image you obtain from scanner in case of preview.

Check the following id,
xxxxx@microsoft.com

Hope this helps you…

Regards
SRinidhi.

----- Original Message -----
From: “ANOOP.G”
To: “NT Developers Interest List”
Cc: “ANOOP.G”
Sent: Saturday, August 10, 2002 9:04 AM
Subject: [ntdev] WIA scanner driver doubt - Last attempt

>
> Hi guys,
>
> I have asked the question here before, just trying again before i attempt
> for a paid Microsoft technical incident or so.
>
> We are developing a WIA scanner minidriver. The scan UI is supplied by
> Microsoft components. There is a “Preview” button and “Scan” button in the
> UI.
>
> 1) Preview is supposed to be faster - so we need to identify that in the
> Minidriver. There is a property called “WIA_DPS_PREVIEW” which has two
> values - “DPS_PREVIEW_SCAN and DPS_FINAL_SCAN”. Wia UI is supposed to set
> DPS_PREVIEW_SCAN when the user clicks the “Preview” button in the UI. But
> that it is not happening.
>
> 2) Also Preview image is appearing as vertically flipped for us.
>
> The same two bugs exist in Microsoft sample code in DDK also
> \ddk\src\wdm\wia\wiascanr
>
> I would like to know whether there is any mail id in Microsoft where i can
> query this problem. I just want to know whether this bug exists in WIA
> scanner UI. If not whether it is possible to get a updated sample driver
or
> information. The first question answer itself might help me.
>
> regards,
> Anoop
>
>
>
> —
> You are currently subscribed to ntdev as: xxxxx@robosoftin.com
> To unsubscribe send a blank email to %%email.unsub%%
>

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