Hand Android's develop frame to the compositor as a texture again

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With Skia drawing pre-rotated on wgpu's Vulkan swapchain, Android no
longer needs to draw with Skia over OpenGL, which was the only reason
the develop view read its frame back through memory (TD-1).

So `unstable-wgpu-29` moves back to the common slint dependency. The
android-activity backend then builds `SkiaRenderer::default_wgpu_29`,
and `shared_gpu` loses its Android arm. The one wgpu device is handed to
Slint through `BackendSelector::require_wgpu_29` on both platforms.
`slint::android::init_with_event_listener` runs before `dr_ui::run`, so
the selector reaches the Android adapter before its window exists.
`renderer-femtovg-wgpu` stays desktop-only, since Android has no FemtoVG.

The two `#[cfg(target_os = "android")]` readbacks in `develop::render`
(the frame through `export_pixels` and the focus overlay through
`read_overlay`) are gone. `read_overlay` stays for the tests that check
what the overlay marks.

Built for arm64 and release-signed. Not yet run on the tablet.

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This commit is contained in:

dtourolle

2026-09-25 04:20:19 -04:00

parent 4b4c9e2e6d

commit a8043e6827

6 changed files with 72 additions and 159 deletions

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docs/dev/traceability.md

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