Solaris X Window System Developer's Guide

Visual Overlay Windows

The Solaris X server supports two application programmer's interfaces (APIs) that enable use of overlay windows. An overlay is a pixel buffer (either physical or software-simulated) into which graphics can be drawn. Applications can use overlays to display temporary imagery in a display window. For more information on the overlay APIs, see Chapter 5, Server Overlay Windowsand Chapter 6, Transparent Overlay Windows.