Struct Recomb 

pub struct Recomb { /* private fields */ }

Recombine channels through a matrix (sharp’s recomb): sepia, channel swaps and the like.

A 3x3 matrix mixes red, green and blue and leaves alpha alone; a 4x4 one mixes alpha in too, and adds an opaque alpha to an image without one so there is somewhere to put it. A greyscale input becomes colour.

Implementations

impl Recomb

pub fn rgb(matrix: [[f32; 3]; 3]) -> Result<Recomb, PixelsError>

Recombine red, green and blue: out[i] = sum(matrix[i][j] * in[j]).

Errors

Returns PixelsError::InvalidArgument if any entry is not finite.

pub fn rgba(matrix: [[f32; 4]; 4]) -> Result<Recomb, PixelsError>

Recombine red, green, blue and alpha.

Errors

As Recomb::rgb.

Trait Implementations

impl Clone for Recomb

fn clone(&self) -> Recomb

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Recomb

impl Debug for Recomb

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

Formats the value using the given formatter.

impl Op for Recomb

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 Recomb

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Recomb