Specifying device state and frame latency in WDDM 1.3

Starting in Windows Display Driver Model (WDDM) 1.3, user-mode display drivers can use escape flags to pass device status and frame latency info to the display miniport driver when the pfnEscapeCb function is called. These flags are available in the D3DDDI_ESCAPEFLAGS structure starting in Windows 8.1.

These reference topics describe how to implement this capability in your user-mode display driver:

• D3DDDI_DEVICEEXECUTION_STATE
• D3DDDI_EXECUTIONSTATEESCAPE
• D3DDDI_FRAMELATENCYESCAPE
• D3DDDI_ESCAPEFLAGS (new DeviceStatusQuery and ChangeFrameLatency members)