gdkPixbufRenderThresholdAlpha {RGtk2}R Documentation

gdkPixbufRenderThresholdAlpha

Description

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.

Usage

gdkPixbufRenderThresholdAlpha(object, bitmap, src.x, src.y, dest.x, dest.y, width = -1, height = -1, alpha.threshold)

Arguments

object [GdkPixbuf] A pixbuf.
bitmap [GdkBitmap] Bitmap where the bilevel mask will be painted to.
src.x [integer] Source X coordinate.
src.y [integer] source Y coordinate.
dest.x [integer] Destination X coordinate.
dest.y [integer] Destination Y coordinate.
width [integer] Width of region to threshold, or -1 to use pixbuf width
height [integer] Height of region to threshold, or -1 to use pixbuf height
alpha.threshold [integer] Opacity values below this will be painted as zero; all other values will be painted as one.

Author(s)

Derived by RGtkGen from GTK+ documentation


[Package RGtk2 version 2.12.5-3 Index]