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layout_2020: Implement support for backface-visibility

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This commit is contained in:
Martin Robinson 2020-05-15 10:40:43 +02:00
parent 7d7e987ba0
commit c2875482d6
14 changed files with 37 additions and 32 deletions
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12
components/layout_2020/style_ext.rs
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@ -8,6 +8,7 @@ use crate::ContainingBlock;
use style::computed_values::mix_blend_mode::T as ComputedMixBlendMode;
use style::computed_values::position::T as ComputedPosition;
use style::computed_values::transform_style::T as ComputedTransformStyle;
use style::properties::longhands::backface_visibility::computed_value::T as BackfaceVisiblity;
use style::properties::longhands::box_sizing::computed_value::T as BoxSizing;
use style::properties::ComputedValues;
use style::values::computed::image::Image as ComputedImageLayer;
@ -17,6 +18,7 @@ use style::values::generics::box_::Perspective;
use style::values::generics::length::MaxSize;
use style::values::specified::box_ as stylo;
use style::Zero;
use webrender_api as wr;
#[derive(Clone, Copy, Eq, PartialEq)]
pub(crate) enum Display {
@ -90,6 +92,7 @@ pub(crate) trait ComputedValuesExt {
fn establishes_containing_block(&self) -> bool;
fn establishes_containing_block_for_all_descendants(&self) -> bool;
fn background_is_transparent(&self) -> bool;
fn get_webrender_primitive_flags(&self) -> wr::PrimitiveFlags;
}
impl ComputedValuesExt for ComputedValues {
@ -375,6 +378,15 @@ impl ComputedValuesExt for ComputedValues {
.iter()
.all(|layer| matches!(layer, ComputedImageLayer::None))
}
/// Generate appropriate WebRender `PrimitiveFlags` that should be used
/// for display items generated by the `Fragment` which owns this style.
fn get_webrender_primitive_flags(&self) -> wr::PrimitiveFlags {
match self.get_box().backface_visibility {
BackfaceVisiblity::Visible => wr::PrimitiveFlags::default(),
BackfaceVisiblity::Hidden => wr::PrimitiveFlags::empty(),
}
}
}
impl From<stylo::Display> for Display {