DTwainCompressedTransfer::GetCompressionType

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Syntax

 

DTwainCompressionType DTwainCompressedTransfer::GetCompressionType( ) const;

 

Return Value

Returns the current compression type to use for buffered transfers.

 

 

Comments

 

 

The compression type can be one of the following values.

 

COMPRESS_NONE

No compression (all Twain Sources must support "no compresion").

COMPRESS_PACKBITS    

Compression using PackBits format.

COMPRESS_GROUP31D    

Compression using Group 3 encoding.

COMPRESS_GROUP31DEOL

Compression using Group 3 encoding.

COMPRESS_GROUP32D

Compression using Group 3 encoding.

COMPRESS_GROUP4

Compression using Group 4 encoding.

COMPRESS_JPEG

Compression using JPEG encoding.

COMPRESS_LZW

Compression using LZW encoding.

COMPRESS_JBIG

Compression using JBIG encoding.

COMPRESS_PNG

Compression using PNG encoding.

COMPRESS_RLE4

Compression using Run Length encoding.

COMPRESS_RLE8

Compression using Run Length encoding.

COMPRESS_BITFIELDS

Compression using Bitfields encoding.