The Window Manager subsystem provides basic capabilities of window and display management. It is the basis for UI display. The following figure shows the architecture of the Window Manager subsystem.
**Figure 1** Architecture of the Window Manager subsystem
Provides window object abstraction and window management interfaces, and connects to the ability and UI framework.
-**Display Manager Client**
Provides display information abstraction and display management interfaces.
-**Window Manager Server**
Provides capabilities such as window layout, Z-order control, window tree structure, window dragging, and window snapshot, and offers the window layout and focus window for multimodal input.
-**Display Manager Server**
Provides display information, screenshot, screen on/off, and brightness processing control, and processes the mapping between the display and screen.