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How to change setting during state 5 or 6 for ADF scanner

Forums › TWAIN Classic › How to change setting during state 5 or 6 for ADF scanner

  • This topic has 1 reply, 2 voices, and was last updated 13 years, 10 months ago by gabe.
Viewing 2 posts - 1 through 2 (of 2 total)
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  • June 12, 2007 at 12:46 am #22158 Reply
    fredzhouca
    Participant
    • Topics - 1
    • Replies - 0
    • Total Posts - 1

    My scanner is HP8290 with ADF enabled, when I scan multi-page,
    I try to change the DPI setting for second page after I scaned first page, but always got fail.
    Then I try to use CAP_EXTENDEDCAPS, but it seems not supported by my scanner.
    If I call DAT_PENDINGXFERS with MSG_RESET, the second paper will eject out, this is not what I want.

    So is there any other solution can change the setting for second page
    without ejecting paper.

    I notice that the XP tool — paint can do both preview and scan with
    different DPI for my ADF scanner, I am confused how it implement this.

    thanks so much in advance

    June 12, 2007 at 11:50 pm #23845 Reply
    gabe
    Participant
    • Topics - 9
    • Replies - 583
    • Total Posts - 592

    I dunno, but it seems that the spec is pretty clear about setting caps when you’re above state 4, pretty much requires cap_extendedcaps. If your device doesn’t support cap_extendedcaps/get or doesn’t like when you try to send cap_extendedcaps/set you are probably hosed.

    If you are always changing the setting for the second page, couldn’t you just request a single page from the device then close your session and open a new session for the second|next page?

    .

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Viewing 2 posts - 1 through 2 (of 2 total)
Reply To: How to change setting during state 5 or 6 for ADF scanner
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