gdkPixbufRenderThresholdAlpha

[<code><a href="/link/GdkPixbuf?package=RGtk2&version=2.8.8" rd-options="" data-mini-rdoc="RGtk2::GdkPixbuf">GdkPixbuf</a></code>]  A pixbuf.

<code>object</code>

[<code><a href="/link/GdkBitmap?package=RGtk2&version=2.8.8" rd-options="" data-mini-rdoc="RGtk2::GdkBitmap">GdkBitmap</a></code>]  Bitmap where the bilevel mask will be painted to.

<code>bitmap</code>

<code>src.x</code>

<code>src.y</code>

<code>dest.x</code>

<code>dest.y</code>

[integer]  Width of region to threshold, or -1 to use pixbuf width

<code>width</code>

[integer]  Height of region to threshold, or -1 to use pixbuf height

<code>height</code>

[integer]  Opacity values below this will be painted as zero; all
other values will be painted as one.

<code>alpha.threshold</code>

Takes the opacity values in a rectangular portion of a pixbuf and thresholds
them to produce a bi-level alpha mask that can be used as a clipping mask for
a drawable.

internal

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

gdkPixbufRenderThresholdAlpha: gdkPixbufRenderThresholdAlpha

Description

Usage

Arguments