On 07/11/16 01:04 AM, Clemens Eisserer wrote: > Hello, > > Java performs antialiased rendering by rasterizing coverage masks (<= > 64x64 pixels in size, PictStandardA8) on the client instead of sending > trapezoid-lists to the XServer. The masks are uploaded using XPutImage > and are later used for XRenderComposite. > On the pro side this approach is *way* better than the > XGetImage+XPutImage call involved before XRender was used. However, > the downside is the really high per-primitive overhead and while SNA > does cope with this workload quite well, glamor does not. > > Here are some upload bandwidth results for 64x64 masks + > XRenderComposite (src=vram_pixmap, mask=uploaded_mask, dst=window): > > Haswell Laptop: > XPutImage-Glamor: 80MB/s > ShmPixmap-Glamor: 177.5MB/s > XPutImage-SNA: 585MB/s > ShmPixmap-SNA: 4000MB/s
Since glamor is much slower in this case as well, you should bring this up on the xorg-devel mailing list, where glamor development is discussed. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ xorg-driver-ati mailing list [email protected] https://lists.x.org/mailman/listinfo/xorg-driver-ati
