Enum BlurError 

pub enum BlurError {
    ResourceCreation {
        stage: BlurStage,
        source: BackendError,
    },
    UnsupportedTarget {
        format: String,
    },
    GrabFailed {
        region: GlRegion,
        source: BackendError,
    },
    UnsupportedContext {
        detail: String,
    },
}

Everything that can go wrong producing a frosted surface. Each Display is a complete sentence; ResourceCreation.stage localizes a 3 AM kiosk failure to the exact resource that died.

Variants

ResourceCreation

A GPU resource could not be created during prepare.

Fields

stage: BlurStage

Which resource failed.

source: BackendError

The backend’s underlying error.

UnsupportedTarget

The caller’s target color format is not on the backend’s supported-composite allowlist. Distinct from a backend’s own must-match-format validation (DESIGN §4.4/§4.5).

Fields

format: String

The rejected format, captured as text at the backend boundary because core cannot name wgpu::TextureFormat (a deliberate String exception, documented in DESIGN §4.5).

GrabFailed

The grab-pass backend could not produce a sampleable source from the live framebuffer. (Reserved for the deferred glow path; the socket exists now so adding it is not a core rewrite.)

Fields

region: GlRegion

The region the grab was attempted for. A GlRegion (GL bottom-left), not a reinterpreted Region: this is a human-facing error, and GlRegion’s Display marks the origin bottom-left so a debugger cannot misread it against Region’s top-left convention.

source: BackendError

The backend’s underlying error.

UnsupportedContext

The live GL context lacks a capability the grab-pass backend requires (too-old GL/GLES, a missing float-render extension). Raised at backend construction, before any frame.

Fields

detail: String

What was required vs. found, captured as text because core cannot name a glow version/extension type (the same documented String exception as UnsupportedTarget, DESIGN §4.5).

Trait Implementations

impl Debug for BlurError

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

Formats the value using the given formatter.

impl Display for BlurError

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

Formats the value using the given formatter.

impl Error for BlurError

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.