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xorgproto 2022.2

Filed under
Graphics/Benchmarks
Linux

This release introduces an new "XWAYLAND" extension:

    This extension exists to serve one purpose: reliably identifying
    Xwayland. Previous attempts at doing so included querying root window
    properties, output names or input device names. All these attempts are
    somewhat unreliable. Instead, let's use an extension - where that
    extension is present we have an Xwayland server.

    Clients should never need to do anything but check whether the extension
    exists through XQueryExtension/XListExtensions.

The DRI3 protocol was bumped to 1.3 and has a new DRI3SetDRMDeviceInUse request:

     This request provides a hint to the server about the device
     in use by this window. This is used to provide
     DRI3GetSupportedModifiers with a hint of what device to
     return modifiers for in the window_modifiers return value.
     Using this hint allows for device-specific modifiers to
     be returned by DRI3GetSupportedModifiers, for example
     when an application is renderoffloaded and eligible for
     direct scanout.

The remaining commits are the usual combination of housekeeping and
maintenance.

Read on

The new XWAYLAND extension is available

  • The new XWAYLAND extension is available

    As of xorgproto 2022.2, we have a new X11 protocol extension. First, you may rightly say "whaaaat? why add new extensions to the X protocol?" in a rather unnecessarily accusing way, followed up by "that's like adding lipstick to a dodo!". And that's not completely wrong, but nevertheless, we have a new protocol extension to the ... [checks calendar] almost 40 year old X protocol. And that extension is, ever creatively, named "XWAYLAND".

    If you recall, Xwayland is a different X server than Xorg. It doesn't try to render directly to the hardware, instead it's a translation layer between the X protocol and the Wayland protocol so that X clients can continue to function on a Wayland compositor. The X application is generally unaware that it isn't running on Xorg and Xwayland (and the compositor) will do their best to accommodate for all the quirks that the application expects because it only speaks X. In a way, it's like calling a restaurant and ordering a burger because the person answering speaks American English. Without realising that you just called the local fancy French joint and now the chefs will have to make a burger for you, totally without avec.

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