Struct ImageFilterLut 

pub struct ImageFilterLut { /* private fields */ }

Image filter weight lookup table.

Stores precomputed filter weights at subpixel resolution for fast image resampling. Weights are stored as 14-bit fixed-point integers.

Port of C++ image_filter_lut.

Implementations

impl ImageFilterLut

pub fn new() -> Self

Create an empty (uninitialized) filter LUT.

pub fn new_with_filter<F: ImageFilterFunction>( filter: &F, normalization: bool, ) -> Self

Create and populate a filter LUT from a filter function.

pub fn radius(&self) -> f64

pub fn diameter(&self) -> u32

pub fn start(&self) -> i32

pub fn weight_array(&self) -> &[i16]

pub fn calculate<F: ImageFilterFunction>( &mut self, filter: &F, normalization: bool, )

Populate the LUT from a filter function.

Port of C++ image_filter_lut::calculate.

pub fn normalize(&mut self)

Normalize weights so that for every subpixel offset, the filter weights sum to exactly IMAGE_FILTER_SCALE.

Port of C++ image_filter_lut::normalize.

Trait Implementations

impl Default for ImageFilterLut

fn default() -> Self

Returns the “default value” for a type.