FASTCONFIG

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 this structure in bytes, for versioning. Use the sizeof() macro to calculate this 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.

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.

Comments

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 L_TwainFindFastConfig, L_TwainGetScanConfigs and L_TwainFreeScanConfig functions.