Struct GpuDropShadow 

#[repr(C, align(16))]
pub struct GpuDropShadow {
    pub header: u32,
    pub center_weight: f32,
    pub linear_weights: [f32; 3],
    pub linear_offsets: [f32; 3],
    pub dx: f32,
    pub dy: f32,
    pub color: u32,
    pub _padding: [u32; 1],
}

A drop shadow’s parameter block, as the fragment stage reads it.

header, center_weight, linear_weights and linear_offsets sit at the same offsets crate::filters::blur::GpuGaussianBlur gives them, so the blur passes of a shadow’s own sequence read this block through the exact accessors a plain blur’s does; dx, dy and color are what a blur’s own block leaves as padding, and only the offset and colourize passes this module adds ever read them.

Fields

header: u32

Packed filter kind, edge mode, decimation count and tap count — the composite-original bit is never set, since this engine serves only the shadow-only shape.

center_weight: f32

Weight of the kernel’s centre tap.

linear_weights: [f32; 3]

Merged weight of each bilinear tap pair.

linear_offsets: [f32; 3]

Fractional offset of each bilinear tap pair.

dx: f32

Horizontal device-space offset of the shadow.

dy: f32

Vertical device-space offset of the shadow.

color: u32

The shadow’s own premultiplied colour, packed as RGBA8.

_padding: [u32; 1]

Unused; present so every filter kind is one stride wide.

Trait Implementations

impl Clone for GpuDropShadow

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 GpuDropShadow

impl Debug for GpuDropShadow

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

Formats the value using the given formatter.

impl From<&DropShadow> for GpuDropShadow

fn from(shadow: &DropShadow) -> Self

Converts to this type from the input type.

impl From<GpuDropShadow> for GpuFilterData

fn from(shadow: GpuDropShadow) -> Self

Converts to this type from the input type.

impl PartialEq for GpuDropShadow

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

Equality operator ==.

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

Inequality operator !=.

impl Pod for GpuDropShadow

impl StructuralPartialEq for GpuDropShadow

impl Zeroable for GpuDropShadow

fn zeroed() -> Self

Calls zeroed.