Trait Process

pub trait Process:
    Send
    + Sync
    + Sized
    + 'static {
    type Settings: Settings + Default + Serialize + for<'a> Deserialize<'a>;
    type OutputLoader: AssetLoader;

    // Required method
    fn process<'a>(
        &'a self,
        context: &'a mut ProcessContext<'_>,
        meta: AssetMeta<(), Self>,
        writer: &'a mut Writer,
    ) -> impl ConditionalSendFuture<Output = Result<<Self::OutputLoader as AssetLoader>::Settings, ProcessError>>;
}

Asset “processor” logic that reads input asset bytes (stored on ProcessContext), processes the value in some way, and then writes the final processed bytes with Writer. The resulting bytes must be loadable with the given Process::OutputLoader.

This is a “low level”, maximally flexible interface. Most use cases are better served by the LoadTransformAndSave implementation of Process.

Required Associated Types

type Settings: Settings + Default + Serialize + for<'a> Deserialize<'a>

The configuration / settings used to process the asset. This will be stored in the AssetMeta and is user-configurable per-asset.

type OutputLoader: AssetLoader

The AssetLoader that will be used to load the final processed asset.

Required Methods

fn process<'a>( &'a self, context: &'a mut ProcessContext<'_>, meta: AssetMeta<(), Self>, writer: &'a mut Writer, ) -> impl ConditionalSendFuture<Output = Result<<Self::OutputLoader as AssetLoader>::Settings, ProcessError>>

Processes the asset stored on context in some way using the settings stored on meta. The results are written to writer. The final written processed asset is loadable using Process::OutputLoader. This load will use the returned AssetLoader::Settings.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Process for ()

The () processor should never be called. This implementation exists to make the meta format nicer to work with.

type Settings = ()

type OutputLoader = ()

async fn process<'a>( &'a self, _context: &'a mut ProcessContext<'_>, _meta: AssetMeta<(), Self>, _writer: &'a mut Writer, ) -> Result<(), ProcessError>

Implementors

impl<Loader, Transformer, Saver> Process for LoadTransformAndSave<Loader, Transformer, Saver>

where Loader: AssetLoader, Transformer: AssetTransformer<AssetInput = Loader::Asset>, Saver: AssetSaver<Asset = Transformer::AssetOutput>,

type Settings = LoadTransformAndSaveSettings<<Loader as AssetLoader>::Settings, <Transformer as AssetTransformer>::Settings, <Saver as AssetSaver>::Settings>

type OutputLoader = <Saver as AssetSaver>::OutputLoader

impl<Loader: AssetLoader, Saver: AssetSaver<Asset = Loader::Asset>> Process for LoadAndSave<Loader, Saver>

type Settings = LoadAndSaveSettings<<Loader as AssetLoader>::Settings, <Saver as AssetSaver>::Settings>

type OutputLoader = <Saver as AssetSaver>::OutputLoader