Enum Error 

#[non_exhaustive]
pub enum Error {
    TargetTooLarge {
        width: u32,
        height: u32,
        limit: u32,
    },
    TargetEmpty {
        width: u32,
        height: u32,
    },
    Limit(LimitExceeded),
    Png(String),
    Io(String),
}

A render that could not produce a pixmap.

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.

TargetTooLarge

The requested target exceeds what a backend can allocate.

vello_cpu sizes every scene, pixmap and mask with u16, so 65535 is the hard ceiling in either axis; the bound is enforced in the engine so both backends agree rather than one of them failing later.

Fields

width: u32

The requested width in pixels.

height: u32

The requested height in pixels.

limit: u32

The largest dimension a backend accepts.

TargetEmpty

The requested target has a zero axis, so there is nothing to render into.

Fields

width: u32

The requested width in pixels.

height: u32

The requested height in pixels.

Limit(LimitExceeded)

RenderSession::deadline passed: before the target was allocated, or during the walk, which stops at the next object and reports here rather than handing back a page with the rest missing.

Png(String)

Available on crate feature png only.

A PNG could not be encoded — only with the png feature. The encoder’s own message, since its error type is neither comparable nor cloneable and this one is both.

Io(String)

Available on crate feature png only.

A file could not be written — only with the png feature; the I/O error’s message.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Self

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

Formats the value using the given formatter.

impl Eq for Error

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<EncodingError> for Error

Available on crate feature png only.

fn from(error: EncodingError) -> Self

Converts to this type from the input type.

impl From<Error> for Error

Available on crate feature png only.

fn from(error: Error) -> Self

Converts to this type from the input type.

impl PartialEq for Error

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Error