Struct DropShadow 

pub struct DropShadow {
    pub dx: f32,
    pub dy: f32,
    pub color: AlphaColor<Srgb>,
    pub std_deviation: f32,
    pub edge_mode: EdgeMode,
    pub composite_original: bool,
    pub n_decimations: usize,
    pub kernel: [f32; 13],
    pub kernel_size: u8,
}

A drop shadow filter.

Fields

dx: f32

The x-offset of the shadow.

dy: f32

The y-offset of the shadow.

color: AlphaColor<Srgb>

The color of the shadow.

std_deviation: f32

Standard deviation for the blur (for reference/debugging).

edge_mode: EdgeMode

Edge mode for blur sampling.

composite_original: bool

Whether to composite the original input over the colored shadow.

n_decimations: usize

Number of 2x2 decimation levels to use (0 means direct convolution).

kernel: [f32; 13]

Pre-computed Gaussian kernel weights for the reduced blur. Only the first kernel_size elements are valid.

kernel_size: u8

Actual length of the kernel (kernel is padded to MAX_KERNEL_SIZE).

Implementations

impl DropShadow

pub fn new( dx: f32, dy: f32, std_deviation: f32, edge_mode: EdgeMode, color: AlphaColor<Srgb>, ) -> Self

Create a new drop shadow filter with the specified parameters.

This precomputes the blur decimation plan and kernel for optimal performance.

pub fn new_shadow_only( dx: f32, dy: f32, std_deviation: f32, edge_mode: EdgeMode, color: AlphaColor<Srgb>, ) -> Self

Create a new shadow-only drop shadow with the specified parameters.

fn new_impl( dx: f32, dy: f32, std_deviation: f32, edge_mode: EdgeMode, color: AlphaColor<Srgb>, composite_original: bool, ) -> Self

Trait Implementations

impl Debug for DropShadow

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

Formats the value using the given formatter.