Enum ScaleError 

#[non_exhaustive]
pub enum ScaleError {
    GlyphNotFound(GlyphId),
    InsufficientMemory {
        required: usize,
        supplied: usize,
    },
    Outline(Error),
    Hinting(HintError),
}

An error from drawing a glyph with a ScalerFont.

Each variant names the step that failed and carries what that step knows. kind gives the same failure as a read-fonts Error, for a caller that only sorts errors.

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.

GlyphNotFound(GlyphId)

The font has no outline for the glyph.

InsufficientMemory

The memory supplied for the draw is smaller than the glyph needs.

Fields

required: usize

The size in bytes the glyph needs, as ScalerOutline::required_memory_size reports it.

supplied: usize

The size in bytes that was supplied.

Outline(Error)

Reading or evaluating the outline failed.

Hinting(HintError)

A TrueType program failed.

This is the font or control value program when the scaler was configured, or a glyph program when hinting is pedantic.

Implementations

impl ScaleError

pub fn kind(&self) -> Error

Returns the kind of failure.

pub(super) fn from_outline( error: Error, required: usize, supplied: usize, ) -> Self

Converts an error from drawing an outline into supplied bytes of a required size.

pub(super) fn from_draw_error( error: DrawError, required: usize, supplied: usize, ) -> Self

Converts an error from skrifa’s automatic hinter, which drew into supplied bytes of a required size.

Trait Implementations

impl Clone for ScaleError

fn clone(&self) -> ScaleError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScaleError

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

Formats the value using the given formatter.

impl Display for ScaleError

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

Formats the value using the given formatter.

impl Error for ScaleError

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 ScaleError

fn from(error: Error) -> Self

Converts to this type from the input type.

impl From<HintError> for ScaleError

fn from(error: HintError) -> Self

Converts to this type from the input type.

impl PartialEq for ScaleError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ScaleError