Ngenuity TWAIN Data Source November 19, 2009
Page 34 of 99
3.6.3 DG_IMAGE / DAT_CUSTOMDSDATA
Supported Messages: MSG_GET (state 4), MSG_SET (state 4)
MSG_GET shall fill the TW_CUSTOMDATA structure with the current state of all the settings
MSG_SET shall fill accept the TW_CUSTOMDATA, check for version integrity, and accept the
settings as the current state.
3.6.4 DG_IMAGE / DAT_EXTIMAGEINFO
Supported Messages: MSG_GET (state 7(after XFERDONE))
Shall provide appropriate responses for the following Extended Image Info Attributes
3.6.4.1
TWEI_DOCUMENTNUMBER
This attribute reports the current document number. Since the Ngenuity scanner currently does not
support any means of document separation or job control, this attribute always responds with 1.
Value Type: TW_UINT32
Value: 1 (always)
3.6.4.2
TWEI_PAGENUMBER
This attribute reports the current page number.
Value Type: TW_UINT32
Value: Current page number (numbers are per-session)
3.6.4.3
TWEI_CAMERA
This attribute reports the current Camera name.
Value Type: TW_STR255
Value: Camera_Top or Camera_Bottom (depends on which side of the page was scanned)
3.6.4.4
TWEI_FRAMENUMBER
This attribute reports the current frame number.
Value Type: TW_UINT32
Value: Current frame number
3.6.4.5
TWEI_FRAME
This attribute reports the frame for the current image.
Value Type: TW_FRAME
Value: Always the same value as reported in ICAP_FRAMES, DAT_IMAGELAYOUT
3.6.4.6
TWEI_PIXELFLAVOR
This attribute reports the pixel gender for the current image.
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