WDDM learning

One 、Windows Display Driver Model (WDDM) structure
WDDM Display driven mode framework , be used for Vista The future system , It is composed of user mode and kernel mode . The following figure shows the supported WDDM Framework .

Graphics hardware suppliers must support user mode display drivers （user-mode display driver） And display the smallest part drive （display miniport driver）. The user mode display driver is a Microsoft Direct3D Dynamic link library loaded at runtime （DLL）. Display the smallest part drive and Microsoft DirectX Graphics kernel subsystem communication .

Two 、WDDM The advantages of
Use WDDM Creating a display driver is simpler , And use Windows 2000 Display Driver Model (XDDM) Is relative , because WDDM The following functions are enhanced .WDDM Drivers contribute to the stability and security of large operating systems , Because only a smaller amount of code runs in kernel mode ,WDDM It can access the system address space and may cause a crash .
Microsoft Direct3D Runtime runtime and Microsoft DirectX The graphics kernel subsystem has better display processing （ Compared with drive , Runtime runtime And subsystems have more code ）. This includes managing video memory and