gtkPreviewSetGamma

<code>gamma</code>


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:
<code>destination_value * pow (source_value/255, 1/gamma)</code>.
The gamma value is applied when the data is
set with <code><a rd-options="" href="/link/gtkPreviewDrawRow?package=RGtk2&version=2.20.31" data-mini-rdoc="RGtk2::gtkPreviewDrawRow">gtkPreviewDrawRow</a></code> so changing this
value will not affect existing data in preview
widgets.
<strong>WARNING: <code>gtk_preview_set_gamma</code> is deprecated and should not be used in newly-written code.</strong>


internal

Facilities in the R language for programming
graphical interfaces using Gtk, the Gimp Tool Kit.

Michael Lawrence

RGtk2

R bindings for Gtk 2.8.0 and above

gtkPreviewSetGamma function


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:
<code>destination_value * pow (source_value/255, 1/gamma)</code>.
The gamma value is applied when the data is
set with <code><a rd-options='' href='gtkPreviewDrawRow'>gtkPreviewDrawRow</a></code> so changing this
value will not affect existing data in preview
widgets.
<strong>WARNING: <code>gtk_preview_set_gamma</code> is deprecated and should not be used in newly-written code.</strong>


gtkPreviewSetGamma: gtkPreviewSetGamma

Description

Usage

Arguments