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LibWeb: Resolve backdrop filter length in apply_style()

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Instead of resolving lengths used in the backdrop-filter during
painting, we can do that earlier in apply_style().

This change moves us a bit closer to the point when the stacking
context tree will be completely separated from the layout tree :)
This commit is contained in:
Aliaksandr Kalenik 2023-10-12 01:34:20 +02:00 • committed by Andreas Kling
parent 6528f6db26
commit 7803dcfcf9
7 changed files with 74 additions and 37 deletions
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30
Userland/Libraries/LibWeb/Layout/Node.cpp
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@ -537,7 +537,35 @@ void NodeWithStyle::apply_style(const CSS::StyleProperties& computed_style)
computed_values.set_flex_shrink(computed_style.flex_shrink());
computed_values.set_order(computed_style.order());
computed_values.set_clip(computed_style.clip());
computed_values.set_backdrop_filter(computed_style.backdrop_filter());
if (computed_style.backdrop_filter().has_filters()) {
CSS::ResolvedBackdropFilter resolved_backdrop_filter;
for (auto& filter : computed_style.backdrop_filter().filters()) {
filter.visit(
[&](CSS::Filter::Blur const& blur) {
resolved_backdrop_filter.filters.append(CSS::ResolvedBackdropFilter::Blur {
.radius = blur.resolved_radius(*this) });
},
[&](CSS::Filter::DropShadow const& drop_shadow) {
// The default value for omitted values is missing length values set to 0
// and the missing used color is taken from the color property.
resolved_backdrop_filter.filters.append(CSS::ResolvedBackdropFilter::DropShadow {
.offset_x = drop_shadow.offset_x.to_px(*this).to_double(),
.offset_y = drop_shadow.offset_y.to_px(*this).to_double(),
.radius = drop_shadow.radius.has_value() ? drop_shadow.radius->to_px(*this).to_double() : 0.0,
.color = drop_shadow.color.has_value() ? *drop_shadow.color : this->computed_values().color() });
},
[&](CSS::Filter::Color const& color_operation) {
resolved_backdrop_filter.filters.append(CSS::ResolvedBackdropFilter::ColorOperation {
.operation = color_operation.operation,
.amount = color_operation.resolved_amount() });
},
[&](CSS::Filter::HueRotate const& hue_rotate) {
resolved_backdrop_filter.filters.append(CSS::ResolvedBackdropFilter::HueRotate { .angle_degrees = hue_rotate.angle_degrees() });
});
}
computed_values.set_backdrop_filter(resolved_backdrop_filter);
}
auto justify_content = computed_style.justify_content();
if (justify_content.has_value())