Struct SpanSubdivAdaptor 

pub struct SpanSubdivAdaptor<T: Transformer> { /* private fields */ }

Span subdivision adaptor.

Breaks long spans into sub-spans of subdiv_size pixels, calling resynchronize() on the inner interpolator at each break point. This corrects accumulated error for non-linear transforms used with linear interpolation.

Port of C++ span_subdiv_adaptor<Interpolator, SubpixelShift>.

Implementations

impl<T: Transformer> SpanSubdivAdaptor<T>

pub fn new(interpolator: SpanInterpolatorLinear<T>) -> Self

Create a new subdivision adaptor with default subdivision shift of 4 (16 pixels).

pub fn new_with_shift( interpolator: SpanInterpolatorLinear<T>, subdiv_shift: u32, ) -> Self

Create with a custom subdivision shift.

pub fn interpolator(&self) -> &SpanInterpolatorLinear<T>

pub fn interpolator_mut(&mut self) -> &mut SpanInterpolatorLinear<T>

pub fn transformer(&self) -> &T

pub fn subdiv_shift(&self) -> u32

pub fn set_subdiv_shift(&mut self, shift: u32)

pub fn begin(&mut self, x: f64, y: f64, len: u32)

Initialize interpolation for a span starting at (x, y) with len pixels.

pub fn next(&mut self)

Advance to the next pixel.

pub fn coordinates(&self, x: &mut i32, y: &mut i32)

Get the current transformed coordinates (in subpixel units).