Enum ImageDecodeError 

pub enum ImageDecodeError {
    Decode(ImageError),
    TaskFailed(String),
}

Off-thread image decode: decode_image_async wraps the existing synchronous ImageSource::decode in spawn_blocking, so it composes with use_task for the full load/error/ready idiom without ever blocking the UI thread on a decode. See image_async’s module docs for why this lives in the facade rather than frust-widgets (which stays reactive-free by charter) and for the Arc-move contract the decoded ImageSource crosses threads under. Off-thread image decode: decode_image_async wraps the existing synchronous ImageSource::decode in spawn_blocking, so it composes with use_task for the full load/error/ready idiom without ever blocking the UI thread on a decode. See image_async’s module docs for why this lives in the facade rather than frust-widgets (which stays reactive-free by charter) and for the Arc-move contract the decoded ImageSource crosses threads under. Off-thread image decode: decode_image_async wraps the existing synchronous ImageSource::decode in spawn_blocking, so it composes with use_task for the full load/error/ready idiom without ever blocking the UI thread on a decode. See image_async’s module docs for why this lives in the facade rather than frust-widgets (which stays reactive-free by charter) and for the Arc-move contract the decoded ImageSource crosses threads under. The error decode_image_async can fail with.

Two distinct failure modes, kept apart rather than collapsed into one message: the synchronous decode itself can fail (Decode, wrapping the existing ImageError unchanged), or the background spawn_blocking task can fail to run to completion at all (TaskFailed — a panic inside the decode closure, or the task being dropped/aborted before it finished; mirrors tokio::task::JoinError’s own two cases). The join-failure text is kept as a plain String here rather than naming tokio::task::JoinError directly: frust has no direct dependency on tokio (only a transitive one through frust-reactive), and this is the one place that would otherwise need one just to name the type.

Variants

Decode(ImageError)

ImageSource::decode ran to completion and reported a decode failure (bad bytes, unsupported format, …).

TaskFailed(String)

The background decode task itself panicked or was cancelled before it could report a result.

Trait Implementations

impl Debug for ImageDecodeError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ImageDecodeError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for ImageDecodeError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.