librsvg 2.62.2

A library to render SVG images to Cairo surfaces. GNOME uses this to render SVG icons. Outside of GNOME, other desktop environments use it for similar purposes. Wikimedia uses it for Wikipedia's SVG diagrams.
Documentation 
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use crate::color::{Color, resolve_color};
use crate::document::AcquiredNodes;
use crate::element::ElementTrait;
use crate::node::{CascadedValues, Node};
use crate::rect::IRect;
use crate::rsvg_log;
use crate::session::Session;
use crate::xml::Attributes;

use super::bounds::BoundsBuilder;
use super::context::{FilterContext, FilterOutput};
use super::{
    FilterEffect, FilterError, FilterResolveError, InputRequirements, Primitive, PrimitiveParams,
    ResolvedPrimitive,
};

/// The `feFlood` filter primitive.
#[derive(Default)]
pub struct FeFlood {
    base: Primitive,
}

/// Resolved `feFlood` primitive for rendering.
pub struct Flood {
    pub color: Color,
}

impl ElementTrait for FeFlood {
    fn set_attributes(&mut self, attrs: &Attributes, session: &Session) {
        self.base.parse_no_inputs(attrs, session);
    }
}

impl Flood {
    pub fn render(
        &self,
        bounds_builder: BoundsBuilder,
        ctx: &FilterContext,
    ) -> Result<FilterOutput, FilterError> {
        let bounds: IRect = bounds_builder.compute(ctx).clipped.into();
        rsvg_log!(ctx.session(), "(feFlood bounds={:?}", bounds);

        let surface = ctx.source_graphic().flood(bounds, self.color)?;

        Ok(FilterOutput { surface, bounds })
    }

    pub fn get_input_requirements(&self) -> InputRequirements {
        InputRequirements::default()
    }
}

impl FilterEffect for FeFlood {
    fn resolve(
        &self,
        _acquired_nodes: &mut AcquiredNodes<'_>,
        node: &Node,
    ) -> Result<Vec<ResolvedPrimitive>, FilterResolveError> {
        let cascaded = CascadedValues::new_from_node(node);
        let values = cascaded.get();

        Ok(vec![ResolvedPrimitive {
            primitive: self.base.clone(),
            params: PrimitiveParams::Flood(Flood {
                color: resolve_color(
                    &values.flood_color().0,
                    values.flood_opacity().0,
                    &values.color().0,
                ),
            }),
        }])
    }
}