Enum Error 

#[non_exhaustive]
pub enum Error {
    Mpv(Error),
    AlreadyAttached,
    RenderBackendMismatch,
    NotAttached,
}

Everything this crate’s fallible calls can return.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Mpv(Error)

An error from libmpv itself, via rsmpv (its Display carries mpv’s mpv_error_string text plus the numeric code).

AlreadyAttached

An attach called while a render context is already live. mpv supports exactly one render context per handle, of either backend.

RenderBackendMismatch

A render call against the wrong attached backend (e.g. render_gl while the software context is attached) — a wiring bug in the shell, surfaced loudly rather than silently dropped.

NotAttached

A call that needs a live render context ran before any attach. Today only Engine::set_render_update_callback returns this — a callback that could never fire is a wiring bug, surfaced loudly like RenderBackendMismatch. The frame path deliberately does not use it: unattached, render_gl/render_sw return Ok untouched and render_update returns false, because “not attached yet” is an ordinary startup state there, not a bug — don’t match on this variant to detect a missing attach from a draw handler.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.