[Bug 16001] XVideo gamma curve is wrong at least for r300 chips

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=16001





--- Comment #12 from Tobias Diedrich <ranma+freedesktop at tdiedrich.de>  2008-05-21 13:34:27 PST ---
(In reply to comment #9)
> Ok. I still see 3 problems. One is purely cosmetic (no need for reading/writing
> ov0_scale_cntl at all for r200 and up chips in the setgamma function), but the
> other two look real. First, it seems (for r100 chips) the gamma set in the
> ov0_scale_cntl reg gets overwritten in the RadeonDisplayVideo function (makes
> me wonder actually why those bogus gamma_sel bits on r200 and up have any
> effect at all since they just gets set to 0 anyway?).

Well, I did notice that they only had an effect until the image was moved or
unpaused (I did my most of my tests with a paused MPlayer window, before I
modified the XVideo test application).

> Also, if the first 3 values for the gamma 1.0 curve were wrong, those for the
> other gamma curves look wrong to me too.

Yeah, that was my impression too.


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