BufferMemoryCompression property (ILTDataTransfer)

Syntax	long BufferMemoryCompression
Overview	Refer to Getting and Setting Capabilities

Remarks

Gets or sets the value indicating the compression to be used when the TransferMode property is set to Memory Buffered Transfer Mode (L_TWSX_MEMORY). Possible values are (according to the TWAIN 1.9 specification):

Value	Meaning
L_TWCP_NONE	No compression is to be used.
L_TWCP_PACKBITS	Pack Bits compression.
L_TWCP_GROUP31D	CCITT Group 3 compression with no End of Line.
L_TWCP_GROUP31DEOL	CCITT Group 3 compression with End of Line.
L_TWCP_GROUP32D	CCITT Group 3 compression (use cap for K Factor).
L_TWCP_GROUP4	CCITT Group 4 compression.
L_TWCP_JPEG	JPEG compression.
L_TWCP_LZW	LZW compression (like gifs).
L_TWCP_JBIG	JBIG compression, used mostly for bi-tonal images.
L_TWCP_PNG	PNG compressed.
L_TWCP_RLE4	RLE4 compression.
L_TWCP_RLE8	RLE8 compression.
L_TWCP_BITFIELDS	Bit Fields compression.

This property is updated with the driver’s current setting when the GetProperties method is called.

To update the data transfer options, set this property and the other ILTDataTransfer properties accessed by the DataTransfer property and call the SetProperties method.

See Also

Elements	DataTransfer property, FillOrder property, TransferMode property, ScanFileFormat property, MemoryBufferSize property, EnableSaveMultipageFile property, EnableAppendToFile property, EnableDumpMemoryBuffersToFile property, GetProperties method, SetProperties method
Topics	TWAIN Functionality: Driver Settings