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Branches
44.38 %
use cssparser::Parser;
use markup5ever::{expanded_name, local_name, namespace_url, ns};
use crate::document::AcquiredNodes;
use crate::drawing_ctx::DrawingCtx;
use crate::element::{set_attribute, ElementTrait};
use crate::error::*;
use crate::node::{CascadedValues, Node};
use crate::parse_identifiers;
use crate::parsers::{Parse, ParseValue};
use crate::properties::ColorInterpolationFilters;
use crate::rect::IRect;
use crate::session::Session;
use crate::surface_utils::shared_surface::Operator as SurfaceOperator;
use crate::xml::Attributes;
use super::bounds::BoundsBuilder;
use super::context::{FilterContext, FilterOutput};
use super::{
FilterEffect, FilterError, FilterResolveError, Input, Primitive, PrimitiveParams,
ResolvedPrimitive,
};
/// Enumeration of the possible compositing operations.
#[derive(Debug, Default, Clone, Copy, Eq, PartialEq, Hash)]
pub enum Operator {
#[default]
Over,
In,
Out,
Atop,
Xor,
Arithmetic,
}
/// The `feComposite` filter primitive.
#[derive(Default)]
pub struct FeComposite {
base: Primitive,
params: Composite,
/// Resolved `feComposite` primitive for rendering.
#[derive(Clone, Default)]
pub struct Composite {
pub in1: Input,
pub in2: Input,
pub operator: Operator,
pub k1: f64,
pub k2: f64,
pub k3: f64,
pub k4: f64,
pub color_interpolation_filters: ColorInterpolationFilters,
impl ElementTrait for FeComposite {
fn set_attributes(&mut self, attrs: &Attributes, session: &Session) {
let (in1, in2) = self.base.parse_two_inputs(attrs, session);
self.params.in1 = in1;
self.params.in2 = in2;
for (attr, value) in attrs.iter() {
match attr.expanded() {
expanded_name!("", "operator") => {
set_attribute(&mut self.params.operator, attr.parse(value), session)
expanded_name!("", "k1") => {
set_attribute(&mut self.params.k1, attr.parse(value), session)
expanded_name!("", "k2") => {
set_attribute(&mut self.params.k2, attr.parse(value), session)
expanded_name!("", "k3") => {
set_attribute(&mut self.params.k3, attr.parse(value), session)
expanded_name!("", "k4") => {
set_attribute(&mut self.params.k4, attr.parse(value), session)
_ => (),
impl Composite {
pub fn render(
&self,
bounds_builder: BoundsBuilder,
ctx: &FilterContext,
acquired_nodes: &mut AcquiredNodes<'_>,
draw_ctx: &mut DrawingCtx,
) -> Result<FilterOutput, FilterError> {
let input_1 = ctx.get_input(
acquired_nodes,
draw_ctx,
&self.in1,
self.color_interpolation_filters,
)?;
let input_2 = ctx.get_input(
&self.in2,
let bounds: IRect = bounds_builder
.add_input(&input_1)
.add_input(&input_2)
.compute(ctx)
.clipped
.into();
let surface = if self.operator == Operator::Arithmetic {
input_1.surface().compose_arithmetic(
input_2.surface(),
bounds,
self.k1,
self.k2,
self.k3,
self.k4,
)?
} else {
input_1
.surface()
.compose(input_2.surface(), bounds, self.operator.into())?
Ok(FilterOutput { surface, bounds })
impl FilterEffect for FeComposite {
fn resolve(
_acquired_nodes: &mut AcquiredNodes<'_>,
node: &Node,
) -> Result<Vec<ResolvedPrimitive>, FilterResolveError> {
let cascaded = CascadedValues::new_from_node(node);
let values = cascaded.get();
let mut params = self.params.clone();
params.color_interpolation_filters = values.color_interpolation_filters();
Ok(vec![ResolvedPrimitive {
primitive: self.base.clone(),
params: PrimitiveParams::Composite(params),
}])
impl Parse for Operator {
fn parse<'i>(parser: &mut Parser<'i, '_>) -> Result<Self, ParseError<'i>> {
Ok(parse_identifiers!(
parser,
"over" => Operator::Over,
"in" => Operator::In,
"out" => Operator::Out,
"atop" => Operator::Atop,
"xor" => Operator::Xor,
"arithmetic" => Operator::Arithmetic,
)?)
impl From<Operator> for SurfaceOperator {
#[inline]
fn from(x: Operator) -> SurfaceOperator {
use Operator::*;
match x {
Over => SurfaceOperator::Over,
In => SurfaceOperator::In,
Out => SurfaceOperator::Out,
Atop => SurfaceOperator::Atop,
Xor => SurfaceOperator::Xor,
_ => panic!("can't convert Operator::Arithmetic to a shared_surface::Operator"),