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bevy/docs/cargo_features.md
MichiRecRoom 94d40d206e
Replace the wgpu_trace feature with a field in bevy_render::settings::WgpuSettings (#14842) 
# Objective
- Remove the `wgpu_trace` feature while still making it easy/possible to
record wgpu traces for debugging.
- Close #14725.
- Get a taste of the bevy codebase. :P

## Solution
This PR performs the above objective by removing the `wgpu_trace`
feature from all `Cargo.toml` files.

However, wgpu traces are still useful for debugging - but to record
them, you need to pass in a directory path to store the traces in. To
avoid forcing users into manually creating the renderer,
`bevy_render::settings::WgpuSettings` now has a `trace_path` field, so
that all of Bevy's automatic initialization can happen while still
allowing for tracing.

## Testing
- Did you test these changes? If so, how?
- I have tested these changes, but only via running `cargo run -p ci`. I
am hoping the Github Actions workflows will catch anything I missed.
- Are there any parts that need more testing?
  - I do not believe so.
- How can other people (reviewers) test your changes? Is there anything
specific they need to know?
- If you want to test these changes, I have updated the debugging guide
(`docs/debugging.md`) section on WGPU Tracing.
- If relevant, what platforms did you test these changes on, and are
there any important ones you can't test?
- I ran the above command on a Windows 10 64-bit (x64) machine, using
the `stable-x86_64-pc-windows-msvc` toolchain. I do not have anything
set up for other platforms or targets (though I can't imagine this needs
testing on other platforms).

---

## Migration Guide

1. The `bevy/wgpu_trace`, `bevy_render/wgpu_trace`, and
`bevy_internal/wgpu_trace` features no longer exist. Remove them from
your `Cargo.toml`, CI, tooling, and what-not.
2. Follow the instructions in the updated `docs/debugging.md` file in
the repository, under the WGPU Tracing section.

Because of the changes made, you can now generate traces to any path,
rather than the hardcoded `%WorkspaceRoot%/wgpu_trace` (where
`%WorkspaceRoot%` is... the root of your crate's workspace) folder.

(If WGPU hasn't restored tracing functionality...) Do note that WGPU has
not yet restored tracing functionality. However, once it does, the above
should be sufficient to generate new traces.

---------

Co-authored-by: TrialDragon <31419708+TrialDragon@users.noreply.github.com>
2024-08-25 14:16:11 +00:00

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<!-- MD041 - This file will be included in docs and should not start with a top header -->
<!-- markdownlint-disable-file MD041 -->
## Cargo Features
Bevy exposes many features to customise the engine. Enabling them add functionalities but often come at the cost of longer compilation times and extra dependencies.
### Default Features
The default feature set enables most of the expected features of a game engine, like rendering in both 2D and 3D, asset loading, audio and UI. To help reduce compilation time, consider disabling default features and enabling only those you need.
|feature name|description|
|-|-|
|android_shared_stdcxx|Enable using a shared stdlib for cxx on Android|
|animation|Enable animation support, and glTF animation loading|
|bevy_animation|Provides animation functionality|
|bevy_asset|Provides asset functionality|
|bevy_audio|Provides audio functionality|
|bevy_color|Provides shared color types and operations|
|bevy_core_pipeline|Provides cameras and other basic render pipeline features|
|bevy_gilrs|Adds gamepad support|
|bevy_gizmos|Adds support for rendering gizmos|
|bevy_gltf|[glTF](https://www.khronos.org/gltf/) support|
|bevy_pbr|Adds PBR rendering|
|bevy_picking|Provides picking functionality|
|bevy_render|Provides rendering functionality|
|bevy_scene|Provides scene functionality|
|bevy_sprite|Provides sprite functionality|
|bevy_state|Enable built in global state machines|
|bevy_text|Provides text functionality|
|bevy_ui|A custom ECS-driven UI framework|
|bevy_winit|winit window and input backend|
|default_font|Include a default font, containing only ASCII characters, at the cost of a 20kB binary size increase|
|hdr|HDR image format support|
|ktx2|KTX2 compressed texture support|
|multi_threaded|Enables multithreaded parallelism in the engine. Disabling it forces all engine tasks to run on a single thread.|
|png|PNG image format support|
|smaa_luts|Include SMAA Look Up Tables KTX2 Files|
|sysinfo_plugin|Enables system information diagnostic plugin|
|tonemapping_luts|Include tonemapping Look Up Tables KTX2 files. If everything is pink, you need to enable this feature or change the `Tonemapping` method on your `Camera2dBundle` or `Camera3dBundle`.|
|vorbis|OGG/VORBIS audio format support|
|webgl2|Enable some limitations to be able to use WebGL2. Please refer to the [WebGL2 and WebGPU](https://github.com/bevyengine/bevy/tree/latest/examples#webgl2-and-webgpu) section of the examples README for more information on how to run Wasm builds with WebGPU.|
|x11|X11 display server support|
|zstd|For KTX2 supercompression|
### Optional Features
|feature name|description|
|-|-|
|accesskit_unix|Enable AccessKit on Unix backends (currently only works with experimental screen readers and forks.)|
|asset_processor|Enables the built-in asset processor for processed assets.|
|async-io|Use async-io's implementation of block_on instead of futures-lite's implementation. This is preferred if your application uses async-io.|
|basis-universal|Basis Universal compressed texture support|
|bevy_ci_testing|Enable systems that allow for automated testing on CI|
|bevy_debug_stepping|Enable stepping-based debugging of Bevy systems|
|bevy_dev_tools|Provides a collection of developer tools|
|bmp|BMP image format support|
|dds|DDS compressed texture support|
|debug_glam_assert|Enable assertions in debug builds to check the validity of parameters passed to glam|
|detailed_trace|Enable detailed trace event logging. These trace events are expensive even when off, thus they require compile time opt-in|
|dynamic_linking|Force dynamic linking, which improves iterative compile times|
|embedded_watcher|Enables watching in memory asset providers for Bevy Asset hot-reloading|
|exr|EXR image format support|
|file_watcher|Enables watching the filesystem for Bevy Asset hot-reloading|
|flac|FLAC audio format support|
|glam_assert|Enable assertions to check the validity of parameters passed to glam|
|ios_simulator|Enable support for the ios_simulator by downgrading some rendering capabilities|
|jpeg|JPEG image format support|
|meshlet|Enables the meshlet renderer for dense high-poly scenes (experimental)|
|meshlet_processor|Enables processing meshes into meshlet meshes for bevy_pbr|
|minimp3|MP3 audio format support (through minimp3)|
|mp3|MP3 audio format support|
|pbr_anisotropy_texture|Enable support for anisotropy texture in the `StandardMaterial`, at the risk of blowing past the global, per-shader texture limit on older/lower-end GPUs|
|pbr_multi_layer_material_textures|Enable support for multi-layer material textures in the `StandardMaterial`, at the risk of blowing past the global, per-shader texture limit on older/lower-end GPUs|
|pbr_transmission_textures|Enable support for transmission-related textures in the `StandardMaterial`, at the risk of blowing past the global, per-shader texture limit on older/lower-end GPUs|
|pnm|PNM image format support, includes pam, pbm, pgm and ppm|
|reflect_functions|Enable function reflection|
|serialize|Enable serialization support through serde|
|shader_format_glsl|Enable support for shaders in GLSL|
|shader_format_spirv|Enable support for shaders in SPIR-V|
|symphonia-aac|AAC audio format support (through symphonia)|
|symphonia-all|AAC, FLAC, MP3, MP4, OGG/VORBIS, and WAV audio formats support (through symphonia)|
|symphonia-flac|FLAC audio format support (through symphonia)|
|symphonia-isomp4|MP4 audio format support (through symphonia)|
|symphonia-vorbis|OGG/VORBIS audio format support (through symphonia)|
|symphonia-wav|WAV audio format support (through symphonia)|
|tga|TGA image format support|
|trace|Tracing support|
|trace_chrome|Tracing support, saving a file in Chrome Tracing format|
|trace_tracy|Tracing support, exposing a port for Tracy|
|trace_tracy_memory|Tracing support, with memory profiling, exposing a port for Tracy|
|track_change_detection|Enables source location tracking for change detection, which can assist with debugging|
|wav|WAV audio format support|
|wayland|Wayland display server support|
|webgpu|Enable support for WebGPU in Wasm. When enabled, this feature will override the `webgl2` feature and you won't be able to run Wasm builds with WebGL2, only with WebGPU.|
|webp|WebP image format support|
|zlib|For KTX2 supercompression|
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