[ CCode ( cprefix = "GDK_PIXBUF_ALPHA_" , type_id = "gdk_pixbuf_alpha_mode_get_type ()" ) ]
[ Version ( deprecated = true , deprecated_since = "2.42" ) ]
public enum PixbufAlphaMode
Warning: PixbufAlphaMode is deprecated since 2.42.
Control the alpha channel for drawables.
There is no user of GdkPixbufAlphaMode in GdkPixbuf, and the Xlib utility functions have been split out to their own library, gdk-pixbuf-xlib
These values can be passed to gdk_pixbuf_xlib_render_to_drawable_alpha in gdk-pixbuf-xlib to control how the alpha channel
of an image should be handled.
This function can create a bilevel clipping mask (black and white) and use it while painting the image.
In the future, when the X Window System gets an alpha channel extension, it will be possible to do full alpha compositing onto arbitrary drawables. For now both cases fall back to a bilevel clipping mask.