linebender / linebender/vello

Vello GPU not rendering when window gets to a certain size

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Dominant language
Rust
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Merged PRs (30d)
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Description

> Somehow does not render when window gets to a certain size.
> Things that I've noticed:
> - When window is enlarged but grid size is small, it still renders.
> - It doesn't matter if there are 2 `VelloScene2d`, all of them will also not render at the same time.
> - Using CPU makes everything renders again!

> https://github.com/user-attachments/assets/bbe21e82-671e-4228-a621-3340471aa03a

> Reporting here as I really can't figure what's the problem here yet.
> You can try the example here: https://github.com/voxell-tech/motiongfx/blob/e74ed5f5cf750f96d0fbd57824b4f5741a4a7b04/examples/bevy_examples/examples/velyst_demo.rs

Issue up-streamed from https://github.com/linebender/bevy_vello/issues/219

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  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the reproduction in examples/bevy_examples/examples/velyst_demo.rs and run it while enlarging the window and comparing GPU with CPU rendering. Use the reported window-size behavior and the upstream bevy_vello issue as the investigation context; done means the Vello GPU scene continues rendering at the affected size.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
computer-graphics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
48/100

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