It easily allows visual effects that string together visuals from multiple applications, such as transparency, because the compositor has access to the graphics of all applications. For example in Windows 7 with WDDM 1.1 drivers, DWM just writes the program's buffer to the video RAM, because thanks to the hardware acceleration of GDI, it doesn’t need to keep a copy of the buffer in system RAM. DWM works in different ways depending on the operating system and on the version of the graphics drivers it uses.
The Desktop Window Manager is a compositing window manager (each program has a buffer in which it writes data, DWM composites each program's buffer into a final image). Direct3D 9 Pixel Shader 2.0 Passes the Windows Aero acceptance test in the Windows Driver Kit (WDK) The implementation of computing tasks in hardware to decrease latency and increase throughput is known as hardware acceleration.Ī GPU that supports the Windows Display Driver Model (WDDM, the graphic driver architecture for video card drivers running Windows versions from Vista). In computing, hardware acceleration is the use of computer hardware specially made to perform some functions more efficiently than is possible in software running on a general-purpose CPU. Windows manager work in conjunction with the underlying graphical system (that provides required functionality) and most window managers are designed to help provide a desktop environment. It is also included with Windows Server 2008, but requires the "Desktop Experience" feature and compatible graphics drivers to be installed.ģ Window Manager A window manager is a software that controls the placement and appearance of windows within a windowing system in a graphical user interface. It was originally created to enable portions of the new "Windows Aero“ (a design language introduced in Windows Vista, which introduced a new look and changes to interface guidelines) user experience, which allowed for effects such as transparency, 3D window switching and more. Presentation on theme: "Desktop Window Manager"- Presentation transcript:ĭesktop Window Manager (DWM) is the window manager in Windows Vista, Windows 7, Windows 8 and Windows 10 that enables the use of hardware acceleration to render the graphical user interface of Windows.
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