Enum Invocation 

pub enum Invocation {
    Scalar,
    Quads,
}

How evaluate_raw runs the program over the grid.

Variants

Scalar

One pixel at a time; a derivative is the grid’s step for an input the caller places with Lane::U or Lane::V (zero for a constant input), and of nothing computed.

Quads

2 x 2 quads, as a GPU runs them (PixelShader::execute_quad): a derivative is the difference inside the quad, of inputs and computed values alike, and an implicit-LOD sample’s footprint the quad’s gradients of its coordinates. A quad past the grid’s last row or column runs its outside lanes as helpers (their coordinates continue past the edge), their values not kept.

Trait Implementations

impl Clone for Invocation

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Invocation

impl Debug for Invocation

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

Formats the value using the given formatter.

impl Eq for Invocation

impl PartialEq for Invocation

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Invocation