[Wayland-bugs] [Bug 83918] New: Standardize wl_scaler protocol extension

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83918

          Priority: medium
            Bug ID: 83918
          Assignee: wayland-bugs at lists.freedesktop.org
           Summary: Standardize wl_scaler protocol extension
          Severity: enhancement
    Classification: Unclassified
                OS: All
          Reporter: ppaalanen at gmail.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: wayland
           Product: Wayland

The wl_scaler protocol extension has been laying in Weston for quite some time
now. I think it is ready to be moved into Wayland.

The protocol XML file should be moved into the Wayland repository and installed
along with wayland.xml, but not merged into wayland.xml.

libwayland should not build nor install code or headers generated for
wl_scaler, except just as a build test. Every user project needs to generate
the code and headers itself. This model seems to be the way forward when
promoting extensions from Weston/elsewhere into Wayland repository. It was
already considered for xdg-shell, and it should avoid exposing even more
extension-specific symbols from libwayland-{client,server}.so.

Open questions:

1. Is wl_scaler good enough to be moved as is, so it maintains compatibility
with projects that already use it with a private copy of the XML file?

2. Should wl_viewport.set request be removed as redundant? If yes, voids
question 1.

3. Should we rename wl_scaler?

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