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33c85bd62a
Same fixes as the previous commits (run no egui pass at all when
nothing will be shown), but the mechanisms are shared instead of
duplicated:
* `Context::run_frame(input, show_ui, f)` is the one entry point for
integrations: one `FramePhase::Logic` (always, outside any pass),
then one `FramePhase::Ui` per pass (none when `show_ui` is false).
`Context::run_logic` is now a thin wrapper around it, and the
logic-outside-of-pass sequencing lives in egui, not in each backend.
* egui itself buffers the input of pass-less frames
(`ViewportState::pending_raw_input`) and prepends it to the next
pass. This replaces `EpiIntegration::pending_raw_input` and the web
backend's `input.raw.append`, so an integration cannot lose input.
* `FullOutput` is now `{ platform_output, viewport_commands,
pass_output: Option<PassOutput> }`, and `LogicOutput` is gone.
One-shot viewport commands (imperative) are separated from
`ViewportOutput` (which viewports should exist - declarative), so
each backend has exactly one command-handling path, shared by frames
with and without a pass. `pass_output: None` encodes "no pass ran:
paint nothing, leave the viewports alone" in the type.
* The glow/wgpu `!show_ui` early-return blocks are gone: a hidden root
viewport flows through the same tail as a visible one, with the
paint and viewport-structure steps gated on `pass_output`.
Behavioral fixes that fall out:
* `App::logic` now sees the current window state in visible frames
too (it was one frame stale outside the hidden path).
* Auto-save keeps working while a window is minimized or occluded.
* Commands sent to a freshly created viewport apply in the same frame.
* The Wayland resize workaround now also covers commands from
pass-less frames.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Test apps
Some application to tests various parts of egui and eframe.
At some point it would be nice to have automatic screenshot regression tests for these.