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layout: Implement filter per CSS-FILTERS § 5.

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`blur` and `drop-shadow` are not yet supported, because the
`text-shadow` PR makes some fundamental changes to blur rendering that
are needed first.
This commit is contained in:
Patrick Walton 2015-01-05 19:22:02 -08:00
parent 6b3c05cdd2
commit 15d60d7ea4
20 changed files with 499 additions and 62 deletions
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10
components/layout/display_list_builder.rs
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@ -44,6 +44,7 @@ use std::default::Default;
use std::num::FloatMath;
use style::computed::{AngleOrCorner, LengthOrPercentage, HorizontalDirection, VerticalDirection};
use style::computed::{Image, LinearGradient};
use style::computed_values::filter::Filter;
use style::computed_values::{background_attachment, background_repeat, border_style, overflow};
use style::computed_values::{position, visibility};
use style::style_structs::Border;
@ -1147,11 +1148,18 @@ impl BlockFlowDisplayListBuilding for BlockFlow {
let margin = self.fragment.margin.to_physical(self.base.writing_mode);
let overflow = self.base.overflow.translate(&-Point2D(margin.left, Au(0)));
// Create the filter pipeline.
let effects = self.fragment.style().get_effects();
let mut filters = effects.filter.clone();
if effects.opacity != 1.0 {
filters.push(Filter::Opacity(effects.opacity))
}
Arc::new(StackingContext::new(display_list,
&border_box,
&overflow,
self.fragment.style().get_box().z_index.number_or_zero(),
self.fragment.style().get_effects().opacity as f32,
filters,
layer))
}
}