sparse_strips/README.md - external/github.com/linebender/vello - Git at Google

 # Vello Sparse Strips

 We are developing a new implementation for Vello that aims to:

 - Be compatible with a wider range of devices (should be able to run on GPUs without compute shader support, using only fragment and vertex shaders).
 - Mitigate some performance cliffs.
 - Handle a wider range of memory conditions (e.g., when less memory is available).

 This folder is being used to develop this implementation and is **not yet suitable for production use**. Our plan is to move the packages in this folder to the top level of the repository once they are ready for use.

 This implementation is based on the **sparse rendering approach** outlined by Raph Levien (@raphlinus) in
 [*Potato: a hybrid CPU/GPU 2D renderer design*](https://docs.google.com/document/d/1gEqf7ehTzd89Djf_VpkL0B_Fb15e0w5fuv_UzyacAPU/edit).
 It leverages **efficient tiling, sorting, and sparse strip allocation** to optimize rendering for both CPU and hybrid CPU/GPU workloads.

 ## Overview

 This directory contains the core crates for the Vello rendering. Each crate serves a distinct role in the architecture, allowing modular development and easier maintenance.

 ### Crates

 - **`vello_api`** – Defines the public API types shared across implementations.
 - **`vello_common`** – Provides shared data structures and utilities for rendering.
 - **`vello_cpu`** – Implements a CPU-based renderer optimized for multithreading and SIMD.
 - **`vello_hybrid`** – A hybrid CPU/GPU renderer, balancing workload between CPU and GPU.
 - **`vello_sparse_shaders`** – Provide compilation of wgsl to glsl to support the WebGL `vello_hybrid` backend.

 ## Development Status

 This structure is **under active development** and subject to changes as the integration progresses. Contributions and feedback are welcome!

 ## Community

 Discussion of Vello Hybrid development happens in the [Linebender Zulip](https://xi.zulipchat.com/), specifically the [#vello channel](https://xi.zulipchat.com/#narrow/channel/197075-vello).
 All public content can be read without logging in.

 Contributions are welcome by pull request.
 The [Rust code of conduct] applies.

 ## License

 Licensed under either of

 - Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or <http://www.apache.org/licenses/LICENSE-2.0>)
 - MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>)

 at your option.

 [Rust code of conduct]: https://www.rust-lang.org/policies/code-of-conduct
	# Vello Sparse Strips

	We are developing a new implementation for Vello that aims to:

	- Be compatible with a wider range of devices (should be able to run on GPUs without compute shader support, using only fragment and vertex shaders).
	- Mitigate some performance cliffs.
	- Handle a wider range of memory conditions (e.g., when less memory is available).

	This folder is being used to develop this implementation and is not yet suitable for production use. Our plan is to move the packages in this folder to the top level of the repository once they are ready for use.

	This implementation is based on the sparse rendering approach outlined by Raph Levien (@raphlinus) in
	[Potato: a hybrid CPU/GPU 2D renderer design](https://docs.google.com/document/d/1gEqf7ehTzd89Djf_VpkL0B_Fb15e0w5fuv_UzyacAPU/edit).
	It leverages efficient tiling, sorting, and sparse strip allocation to optimize rendering for both CPU and hybrid CPU/GPU workloads.

	## Overview

	This directory contains the core crates for the Vello rendering. Each crate serves a distinct role in the architecture, allowing modular development and easier maintenance.

	### Crates

	- `vello_api` – Defines the public API types shared across implementations.
	- `vello_common` – Provides shared data structures and utilities for rendering.
	- `vello_cpu` – Implements a CPU-based renderer optimized for multithreading and SIMD.
	- `vello_hybrid` – A hybrid CPU/GPU renderer, balancing workload between CPU and GPU.
	- `vello_sparse_shaders` – Provide compilation of wgsl to glsl to support the WebGL `vello_hybrid` backend.

	## Development Status

	This structure is under active development and subject to changes as the integration progresses. Contributions and feedback are welcome!

	## Community

	Discussion of Vello Hybrid development happens in the [Linebender Zulip](https://xi.zulipchat.com/), specifically the [#vello channel](https://xi.zulipchat.com/#narrow/channel/197075-vello).
	All public content can be read without logging in.

	Contributions are welcome by pull request.
	The [Rust code of conduct] applies.

	## License

	Licensed under either of

	- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or <http://www.apache.org/licenses/LICENSE-2.0>)
	- MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>)

	at your option.

	[Rust code of conduct]: https://www.rust-lang.org/policies/code-of-conduct