Enum StateQueryError 

#[non_exhaustive]
pub enum StateQueryError {
    UnavailableWebGL2State,
    UnknownArrayBufferInitialState,
    UnknownViewportInitialState,
    UnknownClearColorInitialState,
    UnknownClearDepthInitialState,
    UnknownClearStencilInitialState,
    UnknownStencilComparisonInitialState,
    UnknownStencilReferenceState,
    UnknownStencilMaskState,
    UnknownStencilOpState,
    UnknownDepthWriteMaskState,
    UnknownBlendingEquation(u32),
    CannotRetrieveBlendingEquationRGB,
    CannotRetrieveBlendingEquationAlpha,
    CannotRetrieveBlendingSrcFactorRGB,
    CannotRetrieveBlendingSrcFactorAlpha,
    CannotRetrieveBlendingDstFactorRGB,
    CannotRetrieveBlendingDstFactorAlpha,
    CannotRetrieveRequiredWebGL2Extensions(Vec<String>),
    UnknownBlendingSrcFactorRGB(u32),
    UnknownBlendingSrcFactorAlpha(u32),
    UnknownBlendingDstFactorRGB(u32),
    UnknownBlendingDstFactorAlpha(u32),
    UnknownFaceCullingOrder,
    UnknownFaceCullingMode,
    UnknownScissorRegionInitialState,
}

An error that might happen when the context is queried.

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.

UnavailableWebGL2State

The WebGL2State object is unavailable.

That might occur if the current thread doesn’t support allocating a new graphics state. It might happen if you try to have more than one state on the same thread, for instance.

UnknownArrayBufferInitialState

Unknown array buffer initial state.

UnknownViewportInitialState

Unknown viewport initial state.

UnknownClearColorInitialState

Unknown clear color initial state.

UnknownClearDepthInitialState

Unknown clear depth initial state.

UnknownClearStencilInitialState

Unknown clear stencil initial state.

UnknownStencilComparisonInitialState

Unknown stencil comparison function initial state.

UnknownStencilReferenceState

Unknown stencil reference initial state.

UnknownStencilMaskState

Unknown stencil mask initial state.

UnknownStencilOpState

Unknown stencil operation initial state.

UnknownDepthWriteMaskState

Unknown depth write mask initial state.

UnknownBlendingEquation(u32)

Corrupted blending equation.

CannotRetrieveBlendingEquationRGB

RGB blending equation couldn’t be retrieved when initializing the WebGL2 state.

CannotRetrieveBlendingEquationAlpha

Alpha blending equation couldn’t be retrieved when initializing the WebGL2 state.

CannotRetrieveBlendingSrcFactorRGB

Source RGB factor couldn’t be retrieved when initializing the WebGL2 state.

CannotRetrieveBlendingSrcFactorAlpha

Source alpha factor couldn’t be retrieved when initializing the WebGL2 state.

CannotRetrieveBlendingDstFactorRGB

Destination RGB factor couldn’t be retrieved when initializing the WebGL2 state.

CannotRetrieveBlendingDstFactorAlpha

Destination alpha factor couldn’t be retrieved when initializing the WebGL2 state.

CannotRetrieveRequiredWebGL2Extensions(Vec<String>)

Required WebGL extensions cannot be enabled

UnknownBlendingSrcFactorRGB(u32)

Corrupted blending source factor (RGB).

UnknownBlendingSrcFactorAlpha(u32)

Corrupted blending source factor (alpha).

UnknownBlendingDstFactorRGB(u32)

Corrupted blending destination factor (RGB).

UnknownBlendingDstFactorAlpha(u32)

Corrupted blending destination factor (alpha).

UnknownFaceCullingOrder

Corrupted face culling order.

UnknownFaceCullingMode

Corrupted face culling mode.

UnknownScissorRegionInitialState

Unknown scissor region initial state.

Trait Implementations

impl Debug for StateQueryError

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

Formats the value using the given formatter.

impl Display for StateQueryError

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

Formats the value using the given formatter.

impl Error for StateQueryError

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.