gdkPixbufRenderThresholdAlpha

<code>object</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>

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

<code>width</code>

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

<code>height</code>

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