TRANSFEROPTIONS

typedef struct _tagTransferOptions 
{ 
   L_UINT uStructSize; 
   TWAIN_TRANSFER_MODES TransferMode; 
   L_TCHAR szFileName[L_MAX_PATH]; 
   L_UINT uFileFormat; 
   L_UINT uCompType; 
} TRANSFEROPTIONS,  * pTRANSFEROPTIONS; 

The TRANSFEROPTIONS structure provides information about transfer options to be used when acquiring an image.

Members

L_UINT uStructSize

Size of this structure in bytes, for versioning. Use the sizeof() operator to calculate this value.

TWAIN_TRANSFER_MODES TransferMode

Specifies the transfer mode. For possible values, refer to the TWAIN_TRANSFER_MODES enumeration.

L_TCHAR szFileName

Character string that contains the file name to transfer if the TransferMode is set to TWAIN_TRANSFER_FILE flag.

L_UINT uFileFormat

The file format to transfer if the TransferMode is set to TWAIN_TRANSFER_FILE flag.  Possible values are (according to the TWAIN specification):

Value Meaning
TWFF_TIFF Tagged image file.
TWFF_PICT Macintosh PICT.
TWFF_BMP Windows regular bitmap.
TWFF_XBM X-Windows bitmap.
TWFF_JFIF JPEG file interchange format.
TWFF_FPX Flash pix file.
TWFF_TIFFMULTI Multipage tiff file format.
TWFF_PNG PNG file.
TWFF_SPIFF SPIFF file.
TWFF_EXIF EXIF file.

L_UINT uCompType

The compression type to be used if the TransferMode is set to TWAIN_TRANSFER_MEMORY flag.  Possible values are (according to the TWAIN specification):

Value Meaning
TWCP_NONE No compression is to be used.
TWCP_PACKBITS Pack Bits compression.
TWCP_GROUP31D CCITT Group 3 compression with no End of Line.
TWCP_GROUP31DEOL CCITT Group 3 compression with End of Line.
TWCP_GROUP32D CCITT Group 3 compression (use cap for K Factor).
TWCP_GROUP4 CCITT Group 4 compression.
TWCP_JPEG JPEG compression.
TWCP_LZW LZW compression (like gifs).
TWCP_JBIG JBIG compression, used mostly for bitonal images.
TWCP_PNG PNG compressed.
TWCP_RLE4 RLE4 compression.
TWCP_RLE8 RLE8 compression.
TWCP_BITFIELDS Bit Fields compression.

Comments

pTRANSFEROPTIONS is a pointer to a TRANSFEROPTIONS structure. Where the function parameter type is pTRANSFEROPTIONS, you can declare a TRANSFEROPTIONS variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pTRANSFEROPTIONS variable is necessary only if your program requires a pointer.

TRANSFEROPTIONS is used with the L_TwainSetTransferOptions and L_TwainGetTransferOptions functions.

Help Version 21.0.2021.4.7
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS TWAIN C API Help