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Secondary displays require both hardware and driver support; some graphics cards may support overlay on the second display while their drivers may not yet support it (note: recent (July 2008) graphics chipset driver bugs can cause most video formats apart from mpeg2 to work on both monitors, and mpeg2 only on the primary with most players).
A common design uses a graphics library such as OpenGL or Direct3D which interfaces with the graphics driver to translate received commands to instructions for the accelerator's graphics processing unit (GPU). The GPU uses those instructions to compute the rasterized results and the results are bit blitted to the framebuffer. The framebuffer's ...
WDDM drivers allow video memory to be virtualized, [6] and video data to be paged out of video memory into system RAM. In case the video memory available turns out to be insufficient to store all the video data and textures, currently unused data is moved out to system RAM or to the disk. When the swapped out data is needed, it is fetched back.
These features require the Windows Display Driver Model drivers, which limits DXVA 2.0 to Windows Vista, Windows Server 2008, [1] [5] Windows 7, Windows Server 2008 R2 and Windows 8. On Windows XP and Windows 2000, programs can use DXVA 1.0. DXVA 2.0 allows Enhanced Video Renderer as the video renderer only on Vista, Windows 7, and Windows 8 ...
Video random-access memory (VRAM) is dedicated computer memory used to store the pixels and other graphics data as a framebuffer to be rendered on a computer monitor. [1] It often uses a different technology than other computer memory, in order to be read quickly for display on a screen.
Video overlay is any technique used to display a video window on a computer display while bypassing the chain of CPU to graphics card to computer monitor.This is done in order to speed up the video display, and it is commonly used, for example, by TV tuner cards and early 3D graphics accelerator cards.
Much the way the system BIOS provides a set of functions that are used by software programs to access the system hardware, the video BIOS provides a set of video-related functions that are used by programs to access the video hardware as well as storing vendor-specific settings such as card name, clock frequencies, VRAM types & voltages.
The user-mode drivers as well as the kernel-mode drivers for AMD FirePro products have additional features, and also (not depicted here) additional interfaces. [ 4 ] The FirePro line is designed for compute intensive, multimedia content creation (such as video editors), and mechanical engineering design software (such as CAD programs).