Struct EnsureAlpha 

pub struct EnsureAlpha { /* private fields */ }

Add an alpha channel at a fixed level if there is none (sharp’s ensureAlpha); an image that has one is unchanged.

Implementations

impl EnsureAlpha

pub fn new(level: f32) -> Result<EnsureAlpha, PixelsError>

Add alpha at level, 0 transparent to 1 opaque; sharp’s default is 1.

Errors

Returns PixelsError::InvalidArgument unless level is in 0..=1.

Trait Implementations

impl Clone for EnsureAlpha

fn clone(&self) -> EnsureAlpha

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EnsureAlpha

impl Debug for EnsureAlpha

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

Formats the value using the given formatter.

impl Op for EnsureAlpha

fn name(&self) -> &'static str

A short, stable name for this op, used in diagnostics.

fn rescaled(&self) -> Option<Arc<dyn Op>>

A copy of this op fit for a graph rebuilt at a reduced input resolution, or None if this op must not be.

fn output_descriptor( &self, inputs: &[ImageDescriptor], ) -> Result<ImageDescriptor, PixelsError>

Compute the output shape from the input shapes.

fn input_regions( &self, output: Region, _inputs: &[ImageDescriptor], ) -> Result<Vec<Region>, PixelsError>

The input regions needed to produce output.

fn compute( &self, inputs: &[Tile<'_>], output: &mut TileMut<'_>, ) -> Result<(), PixelsError>

Fill output from inputs — the kernel entry point.

fn arity(&self) -> usize

The number of inputs this op consumes.

fn access_pattern(&self) -> AccessPattern

How this op reads its inputs; drives tile negotiation (ADR-0003).

impl PartialEq for EnsureAlpha

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for EnsureAlpha