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 in the acquisition process.
|
Member |
Description |
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uStructSize |
Size of this structure in bytes, for versioning. Use the sizeof() macro to calculate this value. |
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TransferMode |
Specifies the transfer mode. For possible values, refer to the TWAIN_TRANSFER_MODES enumeration. |
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szFileName |
Character string that contains the file name to transfer if the TransferMode is set to TWAIN_TRANSFER_FILE flag. |
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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) |
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|
Value |
Meaning |
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TWFF_TIFF |
Tagged image file. |
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TWFF_PICT |
Macintosh PICT. |
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TWFF_BMP |
Windows regular bitmap. |
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TWFF_XBM |
X-Windows bitmap. |
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TWFF_JFIF |
JPEG file interchange format. |
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TWFF_FPX |
Flash pix file. |
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TWFF_TIFFMULTI |
Multi-page tiff file format. |
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TWFF_PNG |
PNG file. |
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TWFF_SPIFF |
SPIFF file. |
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TWFF_EXIF |
EXIF file. |
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uCompType |
The compression type to be used if the TransferMode is set to TWAIN_TRANSFER_MEMORY flag. |
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|
Value |
Meaning |
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TWCP_NONE |
No compression is to be used. |
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TWCP_PACKBITS |
Pack Bits compression. |
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TWCP_GROUP31D |
CCITT Group 3 compression with no End of Line. |
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TWCP_GROUP31DEOL |
CCITT Group 3 compression with End of Line. |
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TWCP_GROUP32D |
CCITT Group 3 compression (use cap for K Factor). |
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TWCP_GROUP4 |
CCITT Group 4 compression. |
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TWCP_JPEG |
JPEG compression. |
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TWCP_LZW |
LZW compression (like gifs). |
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TWCP_JBIG |
JBIG compression, used mostly for bitonal images. |
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TWCP_PNG |
PNG compressed. |
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TWCP_RLE4 |
RLE4 compression. |
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TWCP_RLE8 |
RLE8 compression. |
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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 LTwain::SetTransferOptions and LTwain::GetTransferOptions functions.