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-   -   Does 90 Rotated display have hardware acceleration? (http://www.nvnews.net/vbulletin/showthread.php?t=87626)

foice 03-06-07 07:30 AM

Does 90 Rotated display have hardware acceleration?
 
Hi people, I'm going to change my graphic card because it's not able to run at 1280x768 and 90 rotation with hardware acceleration. This is a common missing feature of both the mga and matrox driver of my old G400 card.
So I'm looking for a new card whose driver supports hardware accelerated 1280x768 90 rotated display. Are the lates nvidia driver for linux capable of 1280x768 with 90 rotation and hardware acceleration?
Thanks
Roberto

Any hint of the status of Ati drivers?
Thanks again

AaronP 03-06-07 12:08 PM

Re: Does 90 Rotated display have hardware acceleration?
 
Yes, rotation is hardware-accelerated.

foice 03-06-07 01:15 PM

Re: Does 90 Rotated display have hardware acceleration?
 
So *every* card supported by the current driver can run hardware accelerated 1280x768@16bit 90 rotated, even the good old MX440 chip ... ?

netllama 03-06-07 01:38 PM

Re: Does 90 Rotated display have hardware acceleration?
 
Per the driver REAMDE:

Option "Rotate" "string"

Enable static rotation support. Unlike the RandRRotation option above,
this option takes effect as soon as the X server is started and will work
with older versions of X. This feature is supported on GeForce2 or better
hardware using depth 24. This feature does not work with hardware
overlays, and emulated overlays will be used instead at a substantial
performance penalty. This option is not compatible with the RandR
extension. Valid rotations are "normal", "left", "inverted", and "right".
Default: off.


Option "RandRRotation" "boolean"

Enable rotation support for the XRandR extension. This allows use of the
XRandR X server extension for configuring the screen orientation through
rotation. This feature is supported on GeForce2 or better hardware using
depth 24. This requires an X.Org X 6.8.1 or newer X server. This feature
does not work with hardware overlays, and emulated overlays will be used
instead at a substantial performance penalty. See Appendix U for details.
Default: off.

foice 03-06-07 02:27 PM

Re: Does 90 Rotated display have hardware acceleration?
 
THX for the answer and for not writing "RTFM"
Actually the point was that the documentation, which i had already read, is unclear because doesn't specify it's an hardware accelerated mode, even though not saying the opposite one is lead to think i't's accelerated, but in my mind a clear and firm statement is needed in such a thing.
On the side of the minumum hw the point about
"This feature
does not work with hardware overlays, and emulated overlays will be used
instead at a substantial performance penalty."
make the hw acceleration a little "foggy" and *before* buying I prefer to ask someone expert.

Anyhow thanks for the useful reply.
Roberto

Dragoran 03-06-07 03:23 PM

Re: Does 90 Rotated display have hardware acceleration?
 
if you don't have a quadro card your card does not support overlays anyway so it does not really matter ;)


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