Iimage::readsigcapfile - Intermec 700 Series User Manual

Chapter 6 — Scanner Support

IImage::ReadSigCapFile

246
Syntax
HRESULT IImage::ReadSigCapFile( ITC_SIGCAP_SPEC
*pSigCapSpec, LPCTSTR pszFileName );
Parameters
pSigCapSpec [in] Pointer to the structure that identifies the signature
pszFileName [in] Name of the file in which to copy the image.
Return Values
HRESULT identifying success or error. On error, the following codes will
be returned:
S S_OK
Image successfully returned.
S ITC_RESULT_ERR_BADREGION_E
The specified region is not in the image.
S ITC_RESULT_NO_BC_DECODED_E
A bar code has not yet been decoded or the last bar code decoded was
not a signature capture symbology.
S ITC_FILE_OPEN_E
The file could not be opened.
S ITC_INV_PARAMETER_E
One of the parameters is invalid.
S S_DEVICE_NOT_OPENED_E
The device had not been opened.
Remarks
ReadSigCapFile() will write the image from the last decoded label with
dimensions identified by the calling parameter. If the file already exists, its
contents will be overwritten.
This signature capture region must include the signature capture bar code.
The supported bar codes for signature capture are: PDF417, Code 128,
and Code 39. The caller specifies the width, height, and center of the
image to be retrieved. This image is independent of any rotation of the bar
code relative to the imager. Thus, if the bar code is decoded with the code
itself upside down to the imager, the retrieved image will still be right side
up. However, if the specified image is outside the field of view a result
code of ITC_RESULT_ERR_BADREGION_E will be returned.
This function uses the dimensions of the last decoded bar code as its coor-
dinate system. Thus, all the parameters describing the image size and posi-
tion are in units called "Intelligent Bar Code Units". An Intelligent Bar
Code Unit is equivalent to the narrow element width of the bar code.
capture region. See ReadSigCapFile (page 243) for
a description of this structure.
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