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Add independent window UI scaling - #14
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katulevskiy wants to merge 3 commits into
Open
katulevskiy wants to merge 3 commits into
katulevskiy wants to merge 3 commits into
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This was referenced Oct 1, 2026
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GPUI currently offers font-size changes, but cannot scale an entire application interface independently of the monitor density. Add
Window::set_ui_scaleso layout, painting, pointer hit testing, and pixel scrolling share a consistent coordinate system while native window dimensions and rem/font preferences remain unchanged.The window preserves zoom across native bounds/display updates. Native pointer, touch, file-drop, IME, window-menu, and client-inset coordinates are converted at the platform boundary; synthetic UI events keep their existing logical coordinates.
ui_to_platform_boundslets applications position native child views correctly.This supports persistent desktop UI scaling in zeronsh/zeron#705. The application change uses a temporary Cargo patch to this branch until the API is merged upstream.
Validation:
cargo test -p gpui --lib ui_scale -- --test-threads=1passed both regression tests, covering combined display/UI scaling, unchanged native geometry/fonts, invalid factors, resize retention, and pointer/pixel-versus-line scroll conversion. The consuming Zeron UI suite passed all 1,433 tests, and its desktop application passescargo check. Verified native Linux screenshots at 100%, 150%, and light mode 120% are included in the application PR; macOS and Windows still need live verification.