# webrender

**Repository Path**: mirrors_servo/webrender

## Basic Information

- **Project Name**: webrender
- **Description**: A GPU-based renderer for the web
- **Primary Language**: Unknown
- **License**: MPL-2.0
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-09-25
- **Last Updated**: 2026-02-01

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# WebRender

[![Version](https://img.shields.io/crates/v/webrender.svg)](https://crates.io/crates/webrender)

WebRender is a GPU-based 2D rendering engine written in
[Rust](https://www.rust-lang.org/). [Firefox](https://www.mozilla.org/firefox),
the research web browser [Servo](https://github.com/servo/servo), and other GUI
frameworks draw with it. It currently uses the OpenGL API internally.

**Note that the upstream home for this code is in gfx/wr folder of the
mozilla-central repository at https://hg.mozilla.org/mozilla-central.** The
GitHub repository at https://github.com/servo/webrender should be considered
a downstream mirror, although it contains additional metadata (such as Github
wiki pages) that do not exist in mozilla-central.

Generally speaking, improvements to WebRender should be submitted upstream
in Gecko, but those relevant to the Servo project or those unsuitable for
upstream may be accepted here.

If you are familiar with the mozilla-central contribution workflow, filing bugs
in [Bugzilla](https://bugzilla.mozilla.org/enter_bug.cgi?product=Core&component=Graphics%3A%20WebRender)
and submitting patches there would be preferred.

## Update as a Dependency
After updating shaders in WebRender, go to servo and:

  * Go to the servo directory and do ./mach update-cargo -p webrender
  * Create a pull request to servo


## Use WebRender with Servo
To use a local copy of WebRender with servo, go to your servo build directory and:

  * Edit Cargo.toml
  * Add at the end of the file:

```
[patch."https://github.com/servo/webrender"]
"webrender" = { path = "<path>/webrender" }
"webrender_api" = { path = "<path>/webrender_api" }
```

where `<path>` is the path to your local copy of WebRender.

  * Build as normal

## Documentation

The Wiki has a [few pages](https://github.com/servo/webrender/wiki/) describing the internals and conventions of WebRender.

## Testing

Tests run using OSMesa to get consistent rendering across platforms.

Still there may be differences depending on font libraries on your system, for
example.

See [this gist](https://gist.github.com/finalfantasia/129cae811e02bf4551ac) for
how to make the text tests useful in Fedora, for example.