See Also: Pixmap Members
Pixmaps are offscreen drawables that reside on the server on the X11 platform. They can be drawn upon with the standard drawing primitives, then copied to another drawable (such as a Gdk.Window) with Pixmap.Draw().
The depth of a pixmap is the number of bits per pixels. Bitmaps are simply pixmaps with a depth of 1. (That is, they are monochrome bitmaps - each pixel can be either on or off).
For client-side images, see the Gdk.Pixbuf class.