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typedef struct _FASTCONFIG{L_UINT uStructSize;L_UINT uTransferMode;L_INT nFileFormat;L_UINT32 ulBufferSize;L_UINT uTime;L_INT nBitsPerPixel;L_BOOL bSuccess;} FASTCONFIG, * pFASTCONFIG;
The FASTCONFIG structure provides information about a scan configuration to be tested or a scan configuration that is the result of testing.
| Member | Description | |
| uStructSize | Size of the FASTCONFIG structure, in bytes, for versioning. Use the sizeof() macro to calculate the value. | |
| uTransferMode | Transfer mode for the scan configuration(s). The possible values are: | |
| Value | Meaning | |
| LTWAIN_FILE_MODE | [0x001] Use File transfer mode | |
| LTWAIN_BUFFER_MODE | [0x002] Use Memory transfer mode | |
| LTWAIN_NATIVE_MODE | [0x004] Use Native transfer mode | |
| nFileFormat | Determines the file format that will be used to save scanned images using this scan configuration. Possible values depend on the value of uTransferMode. | |
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If uTransferMode is LTWAIN_FILE_MODE, the possible values are: TWFF_TIFF TWFF_PICT TWFF_BMP TWFF_XBM TWFF_JFIF TWFF_FPX TWFF_TIFFMULTI TWFF_PNG TWFF_SPIFF TWFF_EXIF |
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If uTransferMode is LTWAIN_BUFFER_MODE, the possible values are: FILE_FAX_G4 FILE_FAX_G3_2D FILE_FAX_G3_1D FILE_FAX_G3_1D_NOEOL FILE_JBIG FILE_TIF_JPEG FILE_JPEG_411 FILE_JPEG_422 FILE_JPEG FILE_TIF |
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If uTransferMode is LTWAIN_NATIVE_MODE, the possible values are: FILE_CCITT_GROUP4 FILE_BMP FILE_JPEG FILE_TIF |
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| ulBufferSize | Determines the buffer size that will be used with the buffer transfer mode. If this value is 0, then use the twain driver preferred buffer size. | |
| uTime | The amount of time required to scan the pages used for testing the scan configuration. The number of pages depends on how many pages the user loads in the scanner when testing a scan configuration. The same pages should be used for each test. | |
| nBitsPerPixel | Bits per pixel that will be used. | |
| bSuccess | Specifies whether the configuration being tested succeeded. Possible values are: | |
| Value | Meaning | |
| TRUE | The current scan configuration was successful. | |
| FALSE | The current scan configuration was not successful. | |
pFASTCONFIG is a pointer to a FASTCONFIG structure. Where the function parameter type is pFASTCONFIG, you can declare an FASTCONFIG variable, update the structure's fields, and pass the variable's address in the parameter. Declaring a pFASTCONFIG variable is necessary only if your program requires a pointer.
FASTCONFIG is used with the LTwain::FindFastConfig, LTwain::GetScanConfigs and LTwain::FreeScanConfig functions.