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. _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
