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Bug#989085: ITP: gamescope -- micro-compositor for games

Package: wnpp
Severity: wishlist
Owner: Stephan Lachnit <stephanlachnit@debian.org.com>
X-Debbugs-Cc: debian-devel@lists.debian.org, stephanlachnit@debian.org.com

* Package name    : gamescope
  Version         : 3.8.1
  Upstream Author : Pierre-Loup A. Griffais
* URL             : https://github.com/Plagman/gamescope
* License         : BSD-2-Clause
  Programming Lang: C
  Description     : micro-compositor for games

Will maintain in Games team.

Description on GitHub:

In an embedded session usecase, gamescope does the same thing as steamcompmgr,
but with less extra copies and latency:

    It's getting game frames through Wayland by way of Xwayland, so there's no
copy within X itself before it gets the frame.
    It can use DRM/KMS to directly flip game frames to the screen, even when
stretching or when notifications are up, removing another copy.
    When it does need to composite with the GPU, it does so with async Vulkan
compute, meaning you get to see your frame quick even if the game already has
the GPU busy with the next frame.

It also runs on top of a regular desktop, the 'nested' usecase steamcompmgr
didn't support.

    Because the game is running in its own personal Xwayland sandbox desktop,
it can't interfere with your desktop and your desktop can't interfere with it.
    You can spoof a virtual screen with a desired resolution and refresh rate
as the only thing the game sees, and control/resize the output as needed. This
can be useful in exotic display configurations like ultrawide or multi-monitor
setups that involve rotation.

It runs on Mesa+AMDGPU, and could be made to run on other Mesa/DRM drivers with
minimal work. Can support NVIDIA if/when they support accelerated Xwayland.

- Stephan

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