A Bevy AssetIo
implementation that allows reading from optionally
obfuscated zip asset bundles. Using the bevy_assetio_zip_bundler
crate you can also
automatically bundle your assets in the desired format in your build.rs
script.
Simply enable the plugin when setting up your Bevy app to enable loading from asset bundle files.
App::build()
// Any config must be inserted before adding plugins. This is optional.
.add_resource(AssetIoZipConfig {
// The name of the asset bundle file, excluding the extension, to load
file_name: "assets".into(), // This is the default
})
// Add the default plugins
.add_plugins_with(DefaultPlugins, |group| {
// With our additinoal asset IO plugin
group.add_before::<bevy::asset::AssetPlugin, _>(AssetIoZipPlugin)
})
.run();
Once enabling the plugin, the game will now search for assets.zip
and assets.bin
files
adjacent to the executable when attempting to load assets. If an asset is not found in the zip
file, it will attempt to load the asset using the default Bevy asset loader for the target
platform.
There are two kinds of asset bundle files supported by this plugin, plain .zip
files and
obfuscated zip files ( which have a .bin
extension ). Plain .zip
files are typical zip files
that can be created with normal zip software. Obfuscated zip files can be created with
bevy_assetio_zip_bundler
and are simply a normal zip file that has had the bytes XOR-ed by
0b01010101
.
โ ๏ธ WARNING: Obfuscated zip files provide no real security or protection for your assets. It is trivial to decript the asset bundle even if it is obfuscated. Obfuscation of the zip is only a measure to prevent casual users from being able to immediately introspect the data.
To bundle your bevy assets you can use the bevy_assetio_zip_bundler
crate. The easiest way
to use it is to add this to your build.rs
file:
fn main() {
bevy_assetio_zip_bundler::bundle_crate_assets();
}
This will automatically zip up your crate's assets
folder and put it in your target/
dir
when compiling release builds. When distributing your application simply take your asset bundle
and place it adjacent to the executable and Bevy will attempt to load assets from the bundle
before falling back to the assets
dir.
You can configure the name, obfuscation, and compression of the bundle by creating and
asset_config.toml
file next to your Cargo.toml
file:
# Bundle assets even for debug builds
bundle-for-debug-builds = true # Default: false
# Obfuscate assets. This doesn't protect from reverse-engineering, but it makes it a little harder
# for the average user to read them.
obfuscate = true # Default: false
# Compress the asset bundle using Bzip2 compression. Other options are "deflate" and "none".
compression = "bzip2" # Default: "bzip2"
# The name of the file, not counting the exention, which will be different based on the `obfuscate`
# setting. Obfuscated bundles will end in `.bin` and non-obfuscated bundles will end in `.zip`.
file-name = "assets" # Default: "assets"
# Set the directory that asset bundle should be placed.
out-dir = "../target" # Default "./target"
Alternatively, if you want to create your own tooling or customize the asset bundling process,
you can manually bundle the assets using the bevy_assetio_zip_bundler::bundle_assets
function.
Supported bevy versions per plugin version:
Bevy Version | Plugin Version |
---|---|
0.4 | 0.1 |
master | 0.1 with the bevy-unstable feature ( see below ) |
You can use this crate with Bevy master by adding a patch to your Cargo.toml
and by adding the
bevy-unstable
feature to this crate:
[dependencies]
# Bevy version must be set to "0.4" and we will
# override it in the patch below.
bevy = "0.4"
bevy_assetio_zip = { version = "0.1", features = ["bevy-unstable"] }
[patch.crates-io]
bevy = { git = "https://github.com/bevyengine/bevy.git" }
Note that as Bevy master may or may not introduce breaking API changes, this crate may or may
not compile when using the bevy-unstable
feature.
This crate is licensed under the Katharos License which places certain restrictions on what you are allowed to use it for. Please read and understand the terms before using this crate for your project.