rotate button sucks on the XO

NoiseEHC NoiseEHC at freemail.hu
Mon Mar 2 04:52:00 EST 2009


Jordan, thanks for the info.
I only started to use the XV overlay because I had this little hope that 
somehow I could get a pointer to a hardware buffer to avoid blitting the 
data but as I see it now the LX driver simply copies the overlay data to 
the hardware buffer so I could just use simple X surfaces as well 
speedwise. Is it true?
Could you please answer those question from my earlier message? (copied 
here):

"A little question to Jordan Crouse or anybody else who can answer.
Here Jodran told me that the Geode can do XV flipping:
http://lists.laptop.org/pipermail/devel/2007-May/005208.html
It can be that he either did not reflect to that one part of my message 
or I am just too stupid to make it work. So what I do not see in the XV 
documentation is how to allocate two xvideo frames and flip between 
them? What this code currently does is allocating one frame and doing 
XvShmPutImage. Because its speed depends on the size of the xvideo frame 
I think it does blittting (copying) and not flipping (switching).
So how to do flipping?
ps:
Actually I would need 3 frames for triple buffering but I would be happy 
even with 2 frames. "




Jordan Crouse wrote:
> Benjamin M. Schwartz wrote:
>> Jordan Crouse wrote:
>>> NoiseEHC wrote:
>>>
>>>> 2. An Xvideo RGB overlay displays the big nothing (black) while the 
>>>> screen is rotated.
>>> Indeed - XV is purposely turned off when the screen is rotated (or 
>>> at least, not displayed):
>>
>> The LX hardware supports rotated blits, right?  So in principle, rotated
>> XV could be added to the driver if someone cared sufficiently...?
>
> Absolutely - and as a special bonus, the LX groks how to rotate YUV 
> data natively, so both YUV and RGB video can be rotated.
>
> Jordan
>
>



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