glamor: Delay making pixmaps shared until needed.

[Michel Dänzer]

On 07.11.2015 05:51, Eric Anholt wrote:
> This is a branch I've been working on for a while for glamor,
> targeting 1.19.  The observation is that X allocates many pixmaps,
> only a few of which will be shared between clients, and sharing a new
> pixmap between clients is infrequent.  Given this, we can allocate
> higher-performance non-shared pixmaps, and just use a quick CopyArea
> to a shared pixmap when we need to produce an fd for one (aka when
> texture_from_pixmap is used on a new window).
> 
> This is particularly important for VC4 (Raspberry Pi), since the 3D
> engine can't read from the raster format, but you really want raster
> format for anything you might pageflip to (the scanout engine is slow
> at tiled texture formats).  Window dragging in LXDE or XFCE4 goes from
> rendering at a few fps to mostly smooth.
> 
> This is available in the glamor-delay-shareable branch of my tree.

Patches 1 & 3-9 are

Reviewed-by: Michel Dänzer <michel.daenzer at amd.com>


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer