DisplayXR Browser v1.3.2

Fixes

• Windows: scrolling pages with 3D tiles no longer degrades over time. This was a 1.3.1 regression in the whole-page 2D-under-the-lens overlay. On pages such as the DisplayXR gallery, scrolling could slow to about 48 fps with 41 ms frame gaps, because every frame made three full-window surface copies and the GPU process saturated a CPU core. Those copies are gone, and scrolling now holds 58-60 fps with 16.8 ms gaps. In a 100 s scroll test there were 23 slow frames, down from 149-603 in 1.3.1. (browser-pvt#226, browser-pvt#232)
• Windows: static pages with several 3D tiles now reuse the lens-filtered 2D layer. On the gallery the cached 2D layer is now reused on 100% of frames (1.3.1: 0%), so the display processor reruns its lens filter only when the flat content actually changes. (browser-pvt#232)

Notes

• New safety floor. While 3D tiles are moving (for example during a scroll), the page temporarily falls back to the classic composite. Lens filtering of the 2D page returns about 10 frames after scrolling stops. A page that never reuses the cached layer and also misses its frame budget is backed off to the classic composite automatically.
• three.js-style pages behave as in 1.3.1: about 98% reuse at 60 fps.
• Measured on the panel with an RTX 3080 laptop at 3840x2040.
• The whole-page 2D overlay is Windows-only, so Android and Linux see no user-visible change in this release. Same requirements as 1.3.0: LeiaSR runtime 1.38.0+1874 or later for the 2D-under-the-lens path, otherwise the previous composite is used.

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Auto-published from displayxr-browser-pvt @ 037cf8c414fb4b53bec6602f054c98707c46f40a.

Security updates follow Chrome stable. Every Chrome stable point release is rebuilt and published automatically when the browser's own code is untouched upstream, and verified on a DisplayXR display first when it is not. Not affiliated with Google; Google account sign-in and sync are not available.

Android APK: release-signed (CN=DisplayXR Browser). If you have any preview up to and including 0.1.24 installed, UNINSTALL it before installing this one - those were debug-key signed and Android refuses an install that changes the signing key (browser#188).

Linux (.deb, x64): sudo apt install ./displayxr-browser_1.3.2-1_amd64.deb - needs displayxr-runtime (>= 2.22.2) from DisplayXR/displayxr-runtime releases. A newer .deb upgrades in place; there is no apt repository.