Contents

getCompression(_:factor:)

Returns by indirection the bitmap image representation’s compression type and compression factor.

Declaration

func getCompression(_ compression: UnsafeMutablePointer<NSBitmapImageRep.TIFFCompression>?, factor: UnsafeMutablePointer<Float>?)

Parameters

  • compression:

    On return, an enum constant that represents the compression type used on the data; it corresponds to one of the values returned by the class method Gettiffcompressiontypes(_:count:).

  • factor:

    A float value that is specific to the compression type. Many types of compression don’t support varying degrees of compression and thus ignore factor. JPEG compression allows a compression factor ranging from 0.0 to 1.0, with 0.0 being the lowest and 1.0 being the highest.

Discussion

Use this method to get information on the compression type for the source image data.

See Also

Managing Compression Types