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156 lines
8.1 KiB
Markdown
156 lines
8.1 KiB
Markdown
<img align="right" width="25%" src="logo.png">
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# wgpu
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[](https://matrix.to/#/#Wgpu:matrix.org)
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[](https://matrix.to/#/#wgpu:matrix.org)
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[](https://matrix.to/#/#wgpu-users:matrix.org)
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[](https://github.com/gfx-rs/wgpu/actions)
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[](https://codecov.io/gh/gfx-rs/wgpu)
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`wgpu` is a cross-platform, safe, pure-rust graphics api. It runs natively on Vulkan, Metal, D3D12, D3D11, and OpenGLES; and on top of WebGPU on wasm.
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The api is based on the [WebGPU standard](https://gpuweb.github.io/gpuweb/). It serves as the core of the WebGPU integration in Firefox, Servo, and Deno.
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## Repo Overview
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The repository hosts the following libraries:
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- [](https://crates.io/crates/wgpu) [](https://docs.rs/wgpu/) - User facing Rust API.
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- [](https://crates.io/crates/wgpu-core) [](https://docs.rs/wgpu-core/) - Internal WebGPU implementation.
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- [](https://crates.io/crates/wgpu-hal) [](https://docs.rs/wgpu-hal/) - Internal unsafe GPU API abstraction layer.
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- [](https://crates.io/crates/wgpu-types) [](https://docs.rs/wgpu-types/) - Rust types shared between all crates.
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- [](https://crates.io/crates/deno_webgpu) - WebGPU implementation for the Deno JavaScript/TypeScript runtime
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The following binaries:
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- `cts_runner` - WebGPU Conformance Test Suite runner using `deno_webgpu`.
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- `player` - standalone application for replaying the API traces.
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- `wgpu-info` - program that prints out information about all the adapters on the system or invokes a command for every adapter.
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For an overview of all the components in the gfx-rs ecosystem, see [the big picture](./etc/big-picture.png).
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## Getting Started
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### Rust
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Rust examples can be found at `wgpu/examples`. You can run the examples with `cargo run --example name`. See the [list of examples](wgpu/examples). For detailed instructions, look at our [Get Started](https://github.com/gfx-rs/wgpu/wiki/Getting-Started) wiki.
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If you are looking for a wgpu tutorial, look at the following:
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- https://sotrh.github.io/learn-wgpu/
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### C/C++
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To use wgpu in C/C++, you need [wgpu-native](https://github.com/gfx-rs/wgpu-native).
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### Others
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If you want to use wgpu in other languages, there are many bindings to wgpu-native from languages such as Python, D, Julia, Kotlin, and more. See [the list](https://github.com/gfx-rs/wgpu-native#bindings).
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## Community
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We have the Matrix space [](https://matrix.to/#/#Wgpu:matrix.org) with a few different rooms that form the wgpu community:
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- [](https://matrix.to/#/#wgpu:matrix.org) - discussion of the library's development.
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- [](https://matrix.to/#/#wgpu-users:matrix.org) - discussion of using the library and the surrounding ecosystem.
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- [](https://matrix.to/#/#wgpu-random:matrix.org) - discussion of everything else.
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## Wiki
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We have a [wiki](https://github.com/gfx-rs/wgpu/wiki) that serves as a knowledge base.
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## Supported Platforms
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API | Windows | Linux & Android | macOS & iOS |
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----- | ----------------------------- | ------------------ | ------------------ |
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Vulkan | :white_check_mark: | :white_check_mark: | |
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Metal | | | :white_check_mark: |
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DX12 | :white_check_mark: (W10 only) | | |
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DX11 | :construction: | | |
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GLES3 | | :ok: | |
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:white_check_mark: = First Class Support — :ok: = Best Effort Support — :construction: = Unsupported, but support in progress
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## Environment Variables
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All testing and example infrastructure shares the same set of environment variables that determine which Backend/GPU it will run on.
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- `WGPU_ADAPTER_NAME` with a substring of the name of the adapter you want to use (ex. `1080` will match `NVIDIA GeForce 1080ti`).
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- `WGPU_BACKEND` with a comma separated list of the backends you want to use (`vulkan`, `metal`, `dx12`, `dx11`, or `gl`).
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- `WGPU_POWER_PREFERENCE` with the power preference to choose when a specific adapter name isn't specified (`high` or `low`)
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When running the CTS, use the variables `DENO_WEBGPU_ADAPTER_NAME`, `DENO_WEBGPU_BACKEND`, `DENO_WEBGPU_POWER_PREFERENCE`.
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## Testing
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We have multiple methods of testing, each of which tests different qualities about wgpu. We automatically run our tests on CI if possible. The current state of CI testing:
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| Backend/Platform | Status |
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| ---------------- | ---------------------------------------------------------------------- |
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| DX12/Windows 10 | :heavy_check_mark: (over WARP) |
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| DX11/Windows 10 | :construction: (over WARP) |
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| Metal/MacOS | :x: (no CPU runner) |
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| Vulkan/Linux | :ok: ([cts hangs](https://github.com/gfx-rs/wgpu/issues/1974)) |
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| GLES/Linux | :x: ([egl fails init](https://github.com/gfx-rs/wgpu/issues/1551)) |
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### Core Test Infrastructure
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All framework based examples have image comparison tested against their screenshot.
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To run the test suite on the default device:
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```
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cargo test --no-fail-fast
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```
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There's logic which can automatically run the tests once for each adapter on your system.
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```
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cargo run --bin wgpu-info -- cargo test --no-fail-fast
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```
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Then to run an example's image comparison tests, run:
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```
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cargo test --example <example-name> --no-fail-fast
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```
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Or run a part of the integration test suite:
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```
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cargo test -p wgpu -- <name-of-test>
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```
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If you are a user and want a way to help contribute to wgpu, we always need more help writing test cases.
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### WebGPU Conformance Test Suite
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WebGPU includes a Conformance Test Suite to validate that implementations are working correctly. We can run this CTS against wgpu.
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To run the CTS, first you need to check it out:
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```
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git clone https://github.com/gpuweb/cts.git
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cd cts
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# works in bash and powershell
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git checkout $(cat ../cts_runner/revision.txt)
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```
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To run a given set of tests:
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```
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# Must be inside the cts folder we just checked out, else this will fail
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cargo run --manifest-path ../cts_runner/Cargo.toml --frozen -- ./tools/run_deno --verbose "<test string>"
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```
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To find the full list of tests, go to the [online cts viewer](https://gpuweb.github.io/cts/standalone/?runnow=0&worker=0&debug=0&q=webgpu:*).
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The list of currently enabled CTS tests can be found [here](./cts_runner/test.lst).
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## Coordinate Systems
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wgpu uses the coordinate systems of D3D and Metal:
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Render | Depth | Texture
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-------|-------|--------
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 |  | 
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