Contents

CGSetDisplayTransferByTable(_:_:_:_:_:)

Sets the color gamma function for a display by specifying the values in the RGB gamma tables.

Declaration

func CGSetDisplayTransferByTable(_ display: CGDirectDisplayID, _ tableSize: UInt32, _ redTable: UnsafePointer<CGGammaValue>?, _ greenTable: UnsafePointer<CGGammaValue>?, _ blueTable: UnsafePointer<CGGammaValue>?) -> CGError

Parameters

  • display:

    The identifier of the display to be accessed.

  • tableSize:

    The number of entries in each table.

  • redTable:

    An array of size tableSize containing the values of the red channel in the display’s gamma table. The values should be in the range 0.0 to 1.0.

  • greenTable:

    An array of size tableSize containing the values of the green channel in the display’s gamma table. The values should be in the range 0.0 to 1.0.

  • blueTable:

    An array of size tableSize containing the values of the blue channel in the display’s gamma table. The values should be in the range 0.0 to 1.0.

Return Value

A result code. See Core Graphics Data Types and Constants.

Discussion

The same table may be passed in for the red, green, and blue channels. The tables are interpolated as needed to generate the number of samples required by the graphics hardware.

See Also

Functions