play_ac

10 ms·

1. 31.▲
   by play_ac 3y ago

   >Xrender is completely orthogonal to having windows or not. Heck, Xrender takes a _window_ as target -- Xrender is just an extension to allow more complicated drawing commands to be sent to the server (like alpha composition). Yes, that&
2. 32.▲
   by play_ac 3y ago

   Very few clients I've seen actually call XShmGetImage to draw on the root window because this is incredibly slow and error prone. Having multiple clients do this at the same time is an almost guaranteed way to cause graphical corruptio
3. 33.▲
   by play_ac 3y ago

   No, nothing like this exists in X11. Xorg still doesn't really have support for non-RGB surfaces. DRI3 gets you part of the way there for attaching GPU buffers but the way surfaces work would have to be overhauled to work more like Way
4. 34.▲
   by play_ac 3y ago

   >In any case, X also allowed this for ages, with XV and XShm and the like. No, XShm doesn't do that and the way XV does it is completely dependent on drivers. If you're using Glamour then XV won't use overlays at all. XShm
5. 35.▲
   by play_ac 3y ago

   No, that isn't allowing exposure to kernel graphics buffers. That's allowing clients to draw to the main framebuffer with no acceleration at all. If you're memory mapping pixels into user space and drawing with the CPU then y