Enum GlBackendError 

#[non_exhaustive]
pub enum GlBackendError {
    NoFont,
    MixedGlyphSizes,
    FontChainTooLarge,
    ZeroScale,
    ZeroGrid,
    SurfaceTooLarge,
    Tileset(TilesetError),
}

Errors from configuring the GL backend.

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.

NoFont

No font was provided and the default-font feature is not enabled.

MixedGlyphSizes

The fonts in the configured FontChain disagree on their glyph size.

FontChainTooLarge

The configured FontChain has more glyphs in total than the atlas can address.

ZeroScale

scale was set to 0, which would produce a zero-size surface.

ZeroGrid

The grid was configured with a zero column or row count.

SurfaceTooLarge

cols, rows, and scale combine to a surface wider or taller than u32::MAX physical pixels.

Tileset(TilesetError)

A registered tileset failed to decode (issue #366).

Trait Implementations

impl Debug for GlBackendError

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

Formats the value using the given formatter.

impl Display for GlBackendError

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

Formats the value using the given formatter.

impl Error for GlBackendError

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.