gdkPixbufRenderPixmapAndMask: gdkPixbufRenderPixmapAndMask

Description Usage Arguments Details Value Author(s)

View source: R/gdkFuncs.R

Description

Creates a pixmap and a mask bitmap which are returned in the pixmap.return and mask.return arguments, respectively, and renders a pixbuf and its corresponding thresholded alpha mask to them. This is merely a convenience function; applications that need to render pixbufs with dither offsets or to given drawables should use gdkDrawPixbuf and gdkPixbufRenderThresholdAlpha.

Usage

1
gdkPixbufRenderPixmapAndMask(object, alpha.threshold = 127)

Arguments

object

A pixbuf.

alpha.threshold

Threshold value for opacity values.

Details

The pixmap that is created is created for the colormap returned by gdkRgbGetColormap. You normally will want to instead use the actual colormap for a widget, and use gdkPixbufRenderPixmapAndMaskForColormap.

If the pixbuf does not have an alpha channel, then *mask.return will be set to NULL.

Value

A list containing the following elements:

pixmap.return

Location to store a pointer to the created pixmap, or NULL if the pixmap is not needed.

mask.return

Location to store a pointer to the created mask, or NULL if the mask is not needed.

Author(s)

Derived by RGtkGen from GTK+ documentation


RGtk2 documentation built on June 12, 2018, 5:06 p.m.