Struct layout_2020::display_list::DisplayList

pub struct DisplayList {
    pub wr: DisplayListBuilder,
    pub compositor_info: CompositorDisplayListInfo,
    pub spatial_tree_count: u64,
}

Where the information that’s used to build display lists is stored. This includes both a wr::DisplayListBuilder for building up WebRender-specific display list information and a CompositorDisplayListInfo used to store information used by the compositor, such as a compositor-side scroll tree.

Fields

wr: DisplayListBuilder

The wr::DisplayListBuilder used to collect display list items.

compositor_info: CompositorDisplayListInfo

The information about the WebRender display list that the compositor consumes. This curerntly contains the out-of-band hit testing information data structure that the compositor uses to map hit tests to information about the item hit.

spatial_tree_count: u64

A count of the number of SpatialTree nodes pushed to the WebRender display list. This is merely to ensure that the currently-unused SpatialTreeItemKey produced for every SpatialTree node is unique.

Implementations

impl DisplayList

fn get_next_spatial_tree_item_key(&mut self) -> SpatialTreeItemKey

Produce a new SpatialTreeItemKey. This is currently unused by WebRender, but has to be unique to the entire scene.

pub fn build_stacking_context_tree( &mut self, fragment_tree: &FragmentTree, debug: &DebugOptions, ) -> StackingContext

fn push_reference_frame( &mut self, origin: LayoutPoint, parent_scroll_node_id: &ScrollTreeNodeId, transform_style: TransformStyle, transform: PropertyBinding<LayoutTransform>, kind: ReferenceFrameKind, ) -> ScrollTreeNodeId

fn pop_reference_frame(&mut self)

fn define_scroll_frame( &mut self, parent_scroll_node_id: &ScrollTreeNodeId, parent_clip_chain_id: &ClipChainId, external_id: ExternalScrollId, content_rect: LayoutRect, clip_rect: LayoutRect, scroll_sensitivity: ScrollSensitivity, ) -> (ScrollTreeNodeId, ClipChainId)

fn define_sticky_frame( &mut self, parent_scroll_node_id: &ScrollTreeNodeId, frame_rect: LayoutRect, margins: SideOffsets2D<Option<f32>, LayoutPixel>, vertical_offset_bounds: StickyOffsetBounds, horizontal_offset_bounds: StickyOffsetBounds, ) -> ScrollTreeNodeId

impl DisplayList

pub fn new( viewport_size: LayoutSize, content_size: LayoutSize, pipeline_id: PipelineId, epoch: Epoch, root_scroll_sensitivity: ScrollSensitivity, ) -> Self

Create a new DisplayList given the dimensions of the layout and the WebRender pipeline id.

pub fn define_clip_chain<I>( &mut self, parent: ClipChainId, clips: I, ) -> ClipChainId

where I: IntoIterator<Item = ClipId>, I::IntoIter: ExactSizeIterator + Clone,

impl DisplayList

pub fn build( &mut self, context: &LayoutContext<'_>, fragment_tree: &FragmentTree, root_stacking_context: &StackingContext, ) -> bool

Build the display list, returning true if it was contentful.