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GNOME 48 Mutter To Enjoy Improved Cursor Scaling For Wine Wayland & More
Merged this week to GNOME's Mutter compositor for the GNOME 48 release is support for the wp_viewport protocol for cursor surfaces in order to provide a nicer experience on cursor scaling.
Alexandros Frantzis explained last year in the issue ticket tracking support for wp_viewport for cursor surfaces: "Wine Wayland allows applications to render in the native output resolution, regardless of any compositor side scaling. It uses wp_viewport to achieve this goal (e.g., if scale=2 buffer=100x100 it sets viewport destination to 50x50 in order for the buffer to be displayed as 100x100 physical pixels on screen).
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