Struct Filter 

pub struct Filter {
    pub graph: Arc<FilterGraph>,
}

The main filter system.

A filter combines a graph of filter primitives with optional spatial bounds. If bounds are specified, the filter only applies within that region.

Fields

graph: Arc<FilterGraph>

Filter graph defining the effect pipeline.

Implementations

impl Filter

pub fn from_function(function: FilterFunction) -> Self

Create a simple filter system from a filter function.

Converts a high-level CSS-style filter function into a filter graph. Use this for simple effects like blur, brightness, etc.

pub fn from_primitive(primitive: FilterPrimitive) -> Self

Create a filter system from a filter primitive.

Creates a simple filter graph with a single primitive. Use this for direct access to low-level SVG filter operations.

pub fn bounds_expansion(&self, transform: &Affine) -> Rect

Calculate the bounds expansion for this filter in pixel/device space.

Returns a Rect representing how many extra pixels are needed around the filtered region to correctly compute the filter effect. For example, a blur filter needs to sample beyond the original bounds to avoid edge artifacts.

The expansion accounts for the transform (rotation, scale, and shear) to compute the correct axis-aligned bounding box expansion in device space.

The returned rect is centered at origin:

• x0: negative left expansion (in pixels)
• y0: negative top expansion (in pixels)
• x1: positive right expansion (in pixels)
• y1: positive bottom expansion (in pixels)

Arguments

• transform - The transform applied to this filter layer

Trait Implementations

impl Clone for Filter

fn clone(&self) -> Filter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Filter

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

Formats the value using the given formatter.

impl PartialEq for Filter

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Filter