enso/app
Kaz Wesley b9ec6d4ec3
Context restoration (#7662)
Add support for recovering from GL context loss. When the context is restored, the loading spinner is shown until shaders finish recompiling.

[vokoscreenNG-2023-08-25_09-39-11.webm](https://github.com/enso-org/enso/assets/1047859/cfa90ec5-72a1-41e6-bafa-177fa5e85fb2)

*While the context is missing, the loading spinner is rendered in the 0% state. (This condition will not normally be observed, except momentarily, as the browser should restore the context immediately if it is lost while the page is visible.) When we receive a new context, the spinner switches to the 90% state until restoration completes. Restoration is fast, as we don't need to do much work except recompiling shaders.*

# Important Notes
- A new debug hotkey, Ctrl+Alt+Shift+X, causes context loss for testing. Pressing it a second time causes context restoration.
- `Texture` is still a CPU-bound texture. It now uses the "immutable" `texStorage/texSubImage` API, which is a ["preferred alternative"](https://registry.khronos.org/webgl/specs/latest/2.0/#3.7.6) to the `texImage` API because it can be more efficient.
- The type for texture uniforms is now `Uniform<Option<Texture>>`. Texture uniforms are decoupled from the context.
- A new `ContextLost` error type can be returned by functions that cannot complete if the context is lost.
- Fix some crashes that could occur when context was lost.
- Clarify ownership of some rendering-related types: Externalize, and where possible eliminate, `Rc/RefCell`s.
2023-09-14 14:40:28 +00:00
..
gui Context restoration (#7662) 2023-09-14 14:40:28 +00:00
gui2 Vue widgets (#7728) 2023-09-13 10:06:24 +00:00
ide-desktop Rename trash to delete; fix search bar autofocus (#7710) 2023-09-07 13:06:54 +00:00