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.

Member Description
uStructSize Size of this structure in bytes, for versioning. Use the sizeof() macro to calculate this value.
TransferMode Specifies the transfer mode. For possible values, refer to the TWAIN_TRANSFER_MODES enumeration.
szFileName Character string that contains the file name to transfer if the TransferMode is set to TWAIN_TRANSFER_FILE flag.
uFileFormat The file format to transfer if the TransferMode is set to TWAIN_TRANSFER_FILE flag.  Possible values are (according to the TWAIN 1.9 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 Multi-page tiff file format.
  TWFF_PNG PNG file.
  TWFF_SPIFF SPIFF file.
  TWFF_EXIF EXIF file.
uCompType The compression type to be used if the TransferMode is set to TWAIN_TRANSFER_MEMORY flag.  Possible values are (according to the TWAIN 1.9 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.

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