Enum Error 

#[non_exhaustive]
pub enum Error {
    NotWebp,
    Truncated,
    MissingImage,
    InvalidBitstream {
        codec: Codec,
    },
    InvalidDimensions,
    PixelBufferMismatch,
    UnsupportedFeature,
    InvalidContainer,
    LimitExceeded {
        pixels: u64,
        limit: u64,
    },
    Io(ErrorKind),
}

Errors returned by the WebP codecs (VP8L lossless, VP8 lossy) and this shell crate.

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.

NotWebp

The input is not a well-formed WebP file (bad RIFF/WEBP magic).

Truncated

The input ended in the middle of a header, chunk, or bitstream.

MissingImage

The file contains no image chunk (VP8L or VP8) that this crate can decode.

InvalidBitstream

The input is not a well-formed WebP bitstream; codec names which bitstream (VP8L lossless or VP8 lossy) failed to parse — a bad Huffman stream / transform for Lossless, or a bad frame tag / key-frame start code / dimensions for Lossy.

Fields

codec: Codec

Which codec’s bitstream was malformed.

InvalidDimensions

A requested width or height is 0 or exceeds the VP8L maximum of 16384 (the crate-internal MAX_DIMENSION).

PixelBufferMismatch

The pixel buffer length does not equal width * height * 4 bytes.

UnsupportedFeature

A well-formed WebP that uses a feature this build does not decode.

InvalidContainer

The extended (VP8X) container or one of its chunks is malformed.

LimitExceeded

The image’s pixel count exceeds a caller-supplied decode limit; reported before any large allocation so a hostile header cannot exhaust memory.

Fields

pixels: u64

The image’s width * height.

limit: u64

The configured maximum.

Io(ErrorKind)

An I/O error from a std::io::Read/std::io::Write source. The std::io::ErrorKind is retained; the original message is not.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

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, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Error

impl Error for Error

Available on crate feature std only.

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

Available on crate feature std only.

fn from(err: Error) -> Self

Converts to this type from the input type.

impl PartialEq for Error

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Error