Struct Flip 

pub struct Flip;

Mirror an image vertically: the top row becomes the bottom row.

Access pattern and order

Flip is AccessPattern::Sequential: it reads exactly one input row per output row, reads no neighbours, and wants full-width strips — square tiles would buy it nothing. AccessPattern describes tile shape, and on shape Flip is as sequential as crop.

What Flip reverses is tile order, and that is deliberately not declared here. Op::input_regions already states the mapping exactly — output rows y0..y1 come from input rows H-y1..H-y0 — so the scheduler can derive the order itself and act on it only where it matters: against a forward-only source it inserts a materialization buffer, and against a random-access source (tiled TIFF, a memory buffer) it inserts nothing and the pipeline streams (ADR-0009).

The point is that reversal is a property of the seam, not of this op. A static “always materialize” flag here would force a full-image buffer even where the upstream could serve bands bottom-up perfectly well.

Trait Implementations

impl Clone for Flip

fn clone(&self) -> Flip

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Flip

impl Debug for Flip

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

Formats the value using the given formatter.

impl Default for Flip

fn default() -> Flip

Returns the “default value” for a type.

impl Eq for Flip

impl Op for Flip

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

A mirror permutes pixels and carries no length, so it means the same thing at any resolution.

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

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

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 access_pattern(&self) -> AccessPattern

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

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.

impl PartialEq for Flip

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Flip