Abstract: Described herein are embodiments performed by a computing device capable of having a first display and a second display. The device may also execute a windowing system. Arbitrary applications execute on the computing device. Each such application has a corresponding application window managed by the windowing system. A start-projecting request may be received from an arbitrary one of the applications, and the windowing system may respond to the start request by generating, displaying, and managing a projection window. The application may generate and display content via the projection window. Responsive to the start-projecting request, display information about the first display and the second display may be used by the windowing system to display the projection window. A stop-projecting request from the application may cause the windowing system to terminate the projection window.

Abstract: In response to certain inputs to an application, the operating system generates a snapshot of the graphical interface of an application. Such inputs include, but are not limited, actions that initiate an update of the graphical interface in the display area for the application, such as repositioning, resizing and/or rotating the display area, bringing the display area onto the display, and removing the display area from the display. Other actions that may initiate creation and use of a snapshot include suspending an application, bringing an application into the foreground, and swapping data for an application into and out of main memory. The operating system updates the display area for the application using the snapshot until the application has completed updating its graphical interface for the modified display area. While the application is updating its graphical interface, the operating system can manage other inputs to the application.