2D 图形的抽象。
Cross-platform 2D graphics.
The Piet project consists of a core crate (piet) which describes a 2D graphics API,
and a number of "backends", which implement that API on top of the built-in
2D graphics system of a given platform. This allows the same drawing code to be
used on different platforms, without having to bundle a full 2D renderer.
The motivation for this crate is set forth in this blog post. It is used as the basis of Druid, a cross-platform GUI toolkit.
A companion for Bézier path representation and geometry is kurbo.
Running the examples requires that submodules be checked out. From the root directory, run
git submodule update --init
Piet has largely stabilized, and no major API additions are planned by the original developers. Bug fixes and performance improvements are welcome.
If there is a significant feature you would like to add that can be discussed. For a new feature to be considered, there must be a plan for how it would be implemented in at least the coregraphics, direct2d, and cairo backends, and the actual implementation should include support for at least two of these.
For questions and discussions we use a zulip chat instance at xi.zulipchat.com under the #piet stream.
For cross-platform use, the piet-common crate reexports the most
appropriate implementation for the current target.
piet-cairo The piet-cairo crate depends on the cairo library. A simple test of the cairo
backend is to run cargo run --example test-picture 0 in the piet-cairo directory,
which should produce an image file called cairo-test-00-2.00.png.
piet-coregraphics The piet-coregraphics crate works on macOS only. A simple test of the coregraphics
backend is to run cargo run --example test-picture 0 in the piet-coregraphics directory,
which should produce an image file called coregraphics-test-00-2.00.png.
piet-direct2d The piet-direct2d crate works on Windows only. A simple test of the direct2d
backend is to run cargo run --example test-picture 0 in the piet-direct2d directory,
which should produce an image called d2d-test-00-2.00.png.
piet-svg piet-web This version of Piet has been verified to compile with Rust 1.92 and later.
Future versions of Piet might increase the Rust version requirement. It will not be treated as a breaking change and as such can even happen with small patch releases.
Click here if compiling fails.As time has passed, some of Piet's dependencies could have released versions with a higher Rust requirement. If you encounter a compilation issue due to a dependency and don't want to upgrade your Rust toolchain, then you could downgrade the dependency.
# Use the problematic dependency's name and version
cargo update -p package_name --precise 0.1.1
Discussion of Piet development happens in the Linebender Zulip, specifically the #piet stream. All public content can be read without logging in.
Contributions are welcome by pull request. The Rust code of conduct applies.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache 2.0 license, shall be licensed as noted in the License section, without any additional terms or conditions.
Piet's interface is largely inspired by the Skia Graphics Library as well as the C++ 2D graphics api proposal although piet aims to be much more lightweight and modular.
The library is named after Piet Mondrian. It is abstract and intended to be used for drawing lots of rectangles.
Licensed under either of
at your option.
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