Hi, On 12 December 2014 at 18:22, Ville Syrjälä <ville.syrjala at linux.intel.com> wrote: > > On Fri, Dec 12, 2014 at 06:05:49PM +0000, Daniel Stone wrote: > > On 12 December 2014 at 18:00, Ville Syrjälä < > ville.syrjala at linux.intel.com> > > wrote: > > > Well anyone who is serious about quality ought to handle that stuff. > > > Or at least make sure both GL/whatever and planes ignore the hints in > > > the same way. So if you GL implementation is lax then you anyway need > > > to have some driver/hardware specific knowledge to know which way to go > > > when using the plane path to get matching output. > > > > > > > Anyone who's serious about quality and is also using GL for video, is not > > serious about quality. Or accurate timing. > > You're too hung up on the "GL" there. It doesn't actually matter what > you use to render the video when not using the display hardware. The > same problem remains.
Yes, the problem being that sometimes you want to force the hardware to do exactly what you want and literally nothing else, and sometimes you don't care. I posit that a hint-with-optional-force interface is best, because: - if your hint isn't supported, what do you do? fall back to software? - the number of people who care enough to force it is vanishingly small, which is partly shown by how: - it matches GL semantics - not a great deal of hardware supports them > > > I was more thinking of some global "I want exactly what I said" kind > > > of knob. Maybe as a client cap type of thingy. > > > > I like the idea of keeping it local to the chroma-siting/range hints, > > because it makes it far more clear exactly what it affects. > > You're not thinking wide enough. We would need to add similar hints > to pretty much every property. Which other properties do we have right now that drivers treat as optional hints? If the answer involves hypothetical new properties, what are they? Cheers, Daniel -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20141215/2d313d16/attachment-0001.html>
