[Bug 92220] GL_NV_vdpau_interop partially available

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=92220

--- Comment #10 from riaasm@yahoo.com ---
So if I understand this correctly, all versions of UVD can perform frame-based
interop. I assume that the UVD hardware was created to perform frame-based
interop, but after the GL_NV_vdpau_interop extension was
proposed/suggested/completed by Nvidia the UVD hardware was updated to also
allow field-based interop. The version in which this update was done is UVD
2.2. 

This explains why the UVD hardware only partially supports the GL extension,
since it wasn't aware of the extension at the time the UVD hardware was
created. Is this correct?

If so, userspace apps that only need frame-based interop can just check if UVD
is available since it should work on any UVD hardware. And userspace apps that
need field-based interop can check for the GL extension. Would this be a
reasonable and correct way to check for interop functionality

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