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@metux metux commented Aug 26, 2025

This is a RFC on dropping the obsolete XvMC extension.

Since this is affecting ABI, it's done two separate iterations:

  1. drop the X11 protocol extension, but leave the DDX side intact --> can be done within ABI-25 window
  2. drop the DDX part --> needs to wait for ABI-26 / next major release

See discussion:
https://github.com/orgs/X11Libre/discussions/336

@metux metux added this to the future milestone Aug 26, 2025
@metux metux self-assigned this Aug 26, 2025
@metux metux added the janitor Minor cleanups helping to improve overall code quality. label Aug 26, 2025
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@metux Could you please convert this PR to a draft since the discussion is still ongoing?

@metux metux marked this pull request as draft August 26, 2025 17:46
@metux metux force-pushed the rfc/drop-xvmc branch 2 times, most recently from a03a3b0 to 32ed50f Compare September 4, 2025 09:45
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metux added 5 commits October 23, 2025 13:14
Drop the XvMC protocol handling code, so clients cannot access it anymore,
but still leaving enough of the DDX/driver intact in order not to break
the module ABI.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Since XvMC protocol has been removed, there's no way that XvMC images
ever getting created anymore, so no point in trying to find/use one.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
XvMC X11 extension alredy has been removed, but for ABI compatibility,
we did leave the DDX side intact. Now it's time to remove that, too.

This is explicitly breaking ABI: drivers that still did support XvMC
need to be recompiled.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
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