Enum Refusal 

#[non_exhaustive]
pub enum Refusal {
    Composition(Option<Composition>),
    Placement,
    Interpretation,
    MissingStoredRegion {
        required: Rect,
        available: Rect,
    },
    AuxiliaryGrid {
        index: usize,
        dimensions: (usize, usize),
        registration: AuxiliaryGrid,
    },
}

Required geometry or interpretation could not be established.

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.

Composition(Option<Composition>)

Input is not explicitly composited.

Placement

Input still requires placement or composition.

Interpretation

Required orientation or packed interpretation is unknown or unsupported.

MissingStoredRegion

The decoded source does not cover all requested samples.

Fields

required: Rect

Required source-coordinate rectangle.

available: Rect

Actually stored source rectangle.

AuxiliaryGrid

An auxiliary plane lacks qualified alignment with color samples.

Fields

index: usize

Auxiliary plane index.

dimensions: (usize, usize)

Actual auxiliary dimensions.

registration: AuxiliaryGrid

Adapter-provided alignment evidence.

Trait Implementations

impl Debug for Refusal

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

Formats the value using the given formatter.

impl Display for Refusal

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

Formats the value using the given formatter.

impl Eq for Refusal

impl Error for Refusal

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 PartialEq for Refusal

fn eq(&self, other: &Refusal) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Refusal