With Windows Vista’s new interface and driver model the way DirectX is implemented into the operating system is somewhat different than before, however, it appears that these changes have had a knock on effect with other graphics API’s, which, being the only alternative to Direct3D on the Windows platform currently, affects OpenGL.


Evidently, as it stands now, the only provision for OpenGL Microsoft are making under Windows Vista is for it to be wrapped on top of DirectX. Windows Vista will provide two core 3D API specifications, DirectX9.L (formerly WGF1.0), which the main 3D GUI will utilise, and the yet to be finalised DirectX10 (WGF2.0), however at present it seems that MS will be layering OpenGL not on the more advanced DX10 specification, but the core DX9.L, pinning the specification to OpenGL1.4 and removing any IHV extension provisions.


more: Beyond3D

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