Enum ImageFilter 

pub enum ImageFilter {
    Blur {
        sigma_x: f32,
        sigma_y: f32,
    },
    Color(ColorFilter),
    DropShadow {
        offset: Point,
        sigma_x: f32,
        sigma_y: f32,
        color: Color,
    },
    Compose {
        outer: Arc<ImageFilter>,
        inner: Arc<ImageFilter>,
    },
}

ImageFilter transforms a rasterized draw or layer.

In a composition, the inner filter runs first and feeds the outer filter.

Variants

Blur

Blur applies a Gaussian blur in local x and y units.

Fields

sigma_x: f32

sigma_x is the horizontal standard deviation.

sigma_y: f32

sigma_y is the vertical standard deviation.

Color(ColorFilter)

Color applies a color filter after rasterization.

DropShadow

DropShadow composites the input over a blurred, colored copy of its alpha.

Fields

offset: Point

offset moves the shadow in local coordinates.

sigma_x: f32

sigma_x is the horizontal standard deviation.

sigma_y: f32

sigma_y is the vertical standard deviation.

color: Color

color colors the shadow.

Compose

Compose applies inner and then outer.

Fields

outer: Arc<ImageFilter>

outer receives the filtered result of inner.

inner: Arc<ImageFilter>

inner receives the original input.

Implementations

impl ImageFilter

pub fn blur(sigma_x: f32, sigma_y: f32) -> Self

blur creates a Gaussian image filter with nonnegative sigmas.

pub fn color(filter: ColorFilter) -> Self

color creates an image filter from a color filter.

pub fn compose(outer: ImageFilter, inner: ImageFilter) -> Self

compose applies inner first and outer second.

pub fn drop_shadow( offset: Point, sigma_x: f32, sigma_y: f32, color: Color, ) -> Self

drop_shadow creates a shadow that retains the original input.

pub fn is_nop(&self) -> bool

is_nop reports whether the filter leaves every input pixel unchanged.

pub fn padding(&self) -> [f32; 2]

padding returns conservative local x and y expansion for this filter.

pub fn modifies_transparent_black(&self) -> bool

modifies_transparent_black reports whether this filter can create visible output from a transparent input pixel.

Trait Implementations

impl Clone for ImageFilter

fn clone(&self) -> ImageFilter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ImageFilter

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

Formats the value using the given formatter.

impl PartialEq for ImageFilter

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ImageFilter