23 releases (12 breaking)
|0.30.1||Jul 28, 2020|
|0.29.3||May 26, 2020|
|0.27.1||Mar 19, 2020|
|0.21.2||Dec 19, 2019|
|0.19.0||Nov 11, 2019|
#75 in Graphics APIs
1,353 downloads per month
Used in 8 crates (2 directly)
This package contains three components.
- First, full configuration and build support for Skia in
- Additional C bindings to help out bindgen with stuff it has problems with or to work around linker errors. These are
- And a number of functions that are used to download prebuilt binaries.
Building Skia is quite exceptional, a number of prerequisites need to be available and configured properly for the target platform.
To configure and build Skia,
build_support/skia.rs does all the hard work: it pulls
skia/ from Google's repositories and a number of additional dependencies by executing
skia/tools/git-sync-deps with Python. After that, it configures Skia with Google's GN tool, and finally builds it by giving control to the
ninja executable from the
src/shaper.cpp contain the C++ code that Rust needs to interact with Skia's codebase. These files are processed by the Rust's binding generator that uses libclang for the layout computation and also compiled by clang.
If both steps went well, the resulting Rust binding code is written to
src/bindings.rs, and the
skia-bindings library is found in the output directory alongside where Skia was built previously.
By default, and for performance reasons, Skia is built in release mode even when cargo creates debug output. Skia debug builds can be enabled only by explicitly setting the environment variable
Because building Skia and creating the bindings is slow and depend on a number of components that lie outside the Rust ecosystem, we decided to experiment with prebuilt binaries.
Whenever a new version of
rust-skia is built from the
release branch on our CI server, the resulting Skia library,
skia-bindings library, and
bindings.rs are uploaded to the releases tab of the skia-binaries repository.
And whenever the build script detects that
skia-bindings is built from inside a crate and a prebuilt archive is available that matches the repository's hash, platform, and features, it downloads the package, unpacks it, and skips the full build step of Skia and the bindings.
A full build of Skia downloads several repositories from the Internet. For specific scenarios, like, for example, a packaging script, it can be useful to build Skia offline. To configure that, the build script supports the following environment variables:
||An absolute path pointing to a complete Skia source tree including all dependencies. Setting this variable activates the offline build mode.|
||The ninja command to run. This can be either a filename, or a absolute path to the ninja executable.||
Besides of the features
textlayout that can be directly specified when the package is added as a cargo dependency, the Skia build can be customized further in
build.rs by adjusting one of two structs that are defined in
This struct represents the top level build configuration for
skia-bindings and contains a number of individual feature flags.
FinalBuildConfiguration is created from the
BuildConfiguration and contains name value pairs used by GN to parameterize the Skia build and preprocessor defines used to create the
src/bindings.rs file and the