Previously, any frames in flight (`requestAnimationFrame`) on web were
not being cancelled (`cancelAnimationFrame`) when `WebRunner::destroy`
was called. If a user called `destroy`, then immediately removed the
canvas from the DOM, eframe could panic with a "failed to find (canvas)
element by id" error message.
This PR changes two things:
- The canvas element is directly referenced everywhere it's needed
instead of being looked up by `canvas_id`[^1]
- The RAF handle is stored in `WebRunner` and `cancelAnimationFrame` is
called on it inside of `WebRunner::destroy`[^2]
[^1]: The WebGL/WGPU backends were already holding onto the canvas (and
associated GPU context), so the change is just converting all the
`get_element_by_id` lookups to retrieve the canvas from the web runner
handle.
[^2]: There is only ever one frame in flight, so we store it directly as
a scalar field.
* Clear color values are not explicitely sent to the rendering backend as-is.
Previously, converting from Color32 to Rgba caused an srgb->linear conversion. This conversion is incorrect if the backbuffer doesn't perform automatic conversion from linear->srgb (lack of this conversion is generally what egui assumes!).
* fill in pr numbers in changelog
* Epi comment fix
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
* Color32 comment fix
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
* move changelog line
* rename fix
* use backticks in doc
---------
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
* basic working wgpu @ webgl on websys
* fix glow compile error
* introduced WebPainter trait, provide wgpu renderstate
* WebPainterWgpu destroy implemented
* make custom3d demo work on wgpu backend
* changelog entry for wgpu support eframe wasm
* remove temporary logging hack
* stop using pollster for web
we're actually not allowed to block - this only worked because wgpu on webgl doesn't actually cause anything blocking. However, when trying webgpu this became an issue
* revert cargo update
* compile error if neither glow nor wgpu features are enabled
* code cleanup
* Error handling
* Update changelog with link
* Make sure --all-features work
* Select best framebuffer format from the available ones
* update to wasm-bindgen 0.2.83
* Fix typo
* Clean up Cargo.toml
* Log about using the wgpu painter
* fixup wgpu labels
* fix custom3d_wgpu_shader ub padding
* remove duplicated uniforms struct in wgsl shader for custom3d
* Update docs: add async/await to the web 'start' function
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
