Graphical glitches on android

[iota-xSK]

I tried using Vello to develop an android app and while it runs, on some devices there are graphical glitches. I made a minimal example here. It is basically the simple example adapted to run on android using cargo mobile 2. Am I doing something wrong or is this a glitch with the library?

[DJMcNab]

Does this reproduce with our with_winit example, which already runs on Android? Your example code is hard for us to use as it is all rights reserved, and so we don't have permission to run it.

Unfortunately, I don't have a device to hand with that GPU; it's hard to reproduce this without that. It seems most likely that the Vulkan implementation on that device is incorrect, but it's possible that a mistake on our end is causing this.

[iota-xSK]

I am having issues with running it with cargo apk:

$ cargo apk run -p with_winit
Already configuring "src/main.rs"
Using package `with_winit` in `/home/iota/Downloads/vello/examples/with_winit/Cargo.toml`
Error: Invalid args.

As for the all rights reserved code, I just forgot to add a license, will do that now so that it's easier for you guys. Sorry for the mistake

[DJMcNab]

Apologies, our readme is out of date. You need to run the command as:

cargo apk run -p with_winit --lib

[iota-xSK]

Thank you! Weirdly enough the glitches don't happen with those examples. I must have done something wrong when converting the simple example to android. Any other ideas? Maybe I can help debug this somehow since I own a device with the issue?

[DJMcNab]

I don't have the bandwidth to dive into this right now, but if you do reach any conclusions I'd be interested to see them.

[iota-xSK]

Understandable, I'll play around with it and report if I get findings. Thanks!

[iota-xSK]

I found the issue - I left msaa16 antialiasing in my code. As soon as I set antialiasing to area only, it fixed everything and there were no more graphical glitches.