gtkPreviewSetGamma {RGtk2} | R Documentation

## gtkPreviewSetGamma

### Description

Set the gamma-correction value for all preview widgets. (This function will eventually be replaced with a function that sets a per-preview-widget gamma value). The resulting intensity is given by: `destination_value * pow (source_value/255, 1/gamma)`. The gamma value is applied when the data is set with `gtkPreviewDrawRow` so changing this value will not affect existing data in preview widgets. WARNING: `gtk_preview_set_gamma` is deprecated and should not be used in newly-written code.

### Usage

    gtkPreviewSetGamma(gamma)

### Arguments

``gamma`` | the new gamma value.

### Author(s)

Derived by RGtkGen from GTK+ documentation

[Package RGtk2 version 2.20.36.3 Index]