Bug 15065

Summary:	xv overlay when rotated is fail
Product:	xorg	Reporter:	Stuart Bennett <sb476>
Component:	Driver/nouveau	Assignee:	Nouveau Project <nouveau>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Stuart Bennett 2008-03-16 12:14:11 UTC

The overlay does not work when the output is rotated (under randr12)

To reproduce:
1) Start nouveau, using randr12
2) xrandr -o 2
3) mplayer foo.avi
4) cry

Since rotation is commonly used for projectors (where there's a reasonable chance of Xv being used), this is not a made up problem :)

Someone fixing the coordinate-fu would be awesome, but falling back to the blitter is probably far far easier.

Comment 1 Arthur Huillet 2008-03-21 06:49:22 UTC

Very superficial investigation confirms the bug and suggests the overlay cannot do rotation.

Blitter fallback would appear as the only solution.

If you have time to test with the binary blob and see how it deals with rotation and overlay, the data would be greatly appreciated (mmiotrace).

Comment 2 Stuart Bennett 2008-03-26 11:15:58 UTC

From the nvidia README:

"        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 XOrg 6.8.1 or newer
                X server.  This feature does not work with hardware overlays,
                emulated overlays will be used instead at a substantial
                performance penalty.  See APPENDIX W for details.
                Default: off."

Testing with the nvidia driver confirms that even for the non-rotated case the overlay is not used (when the above option is set), so it would seem falling back to blitter is the answer.

Comment 3 Stuart Bennett 2008-04-29 07:07:23 UTC

Fixed in commit c8cec9b2 "randr12, xv: no overlay when the crtc is transformed"

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