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gpui: Enable MSAA to Path render for Anti-Aliasing (#22812)

Browse source 
Closes #20762

Release Notes:

- N/A

---

Enable MSAA for Anti-Aliasing to Path (`cx.paint_path`) for drawing a
better vector graphics.

```bash
cargo run -p gpui --example gradient --features macos-blade
cargo run -p gpui --example gradient

cargo run -p gpui --example painting --features macos-blade
cargo run -p gpui --example painting
```

**Before**

<img width="1089" alt="image"
src="https://github.com/user-attachments/assets/0ae7240f-4ba9-4ef5-896c-e436c1282770"
/>

**After**

<img width="944" alt="image"
src="https://github.com/user-attachments/assets/71a07ae8-be54-452c-aacc-b8cec1f810c0"
/>

## TODO

- [x] Support Metal and Blade.
- [x] Detect system support to set up sample count.
- [x] Fix extra lines between Path vertices wait #22808 to merge.

Ref https://github.com/kvark/blade/pull/213

Ask @kvark to review.

I am not sure if there is anything I missed. I modified it according to
the
[particle](https://github.com/kvark/blade/tree/main/examples/particle)
example of Blade project. But the difference is that after the first
MSAA render, I did not do it a second time, I tested it and found it was
not necessary.
This commit is contained in:
Jason Lee 2025-01-30 04:14:40 +08:00 • committed by GitHub
parent 31fa414422
commit b9e0aae49f
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6 changed files with 136 additions and 34 deletions
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Cargo.toml
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@ -375,9 +375,9 @@ async-watch = "0.3.1"
async_zip = { version = "0.0.17", features = ["deflate", "deflate64"] }
base64 = "0.22"
bitflags = "2.6.0"
blade-graphics = { git = "https://github.com/kvark/blade", rev = "091a8401033847bb9b6ace3fcf70448d069621c5" }
blade-macros = { git = "https://github.com/kvark/blade", rev = "091a8401033847bb9b6ace3fcf70448d069621c5" }
blade-util = { git = "https://github.com/kvark/blade", rev = "091a8401033847bb9b6ace3fcf70448d069621c5" }
blade-graphics = { git = "https://github.com/kvark/blade", rev = "b16f5c7bd873c7126f48c82c39e7ae64602ae74f" }
blade-macros = { git = "https://github.com/kvark/blade", rev = "b16f5c7bd873c7126f48c82c39e7ae64602ae74f" }
blade-util = { git = "https://github.com/kvark/blade", rev = "b16f5c7bd873c7126f48c82c39e7ae64602ae74f" }
blake3 = "1.5.3"
bytes = "1.0"
cargo_metadata = "0.19"