Struct webrender::hit_test::HitTestingScene

pub struct HitTestingScene {
    clip_nodes: FastHashMap<ClipNodeId, HitTestClipNode>,
    items: Vec<HitTestingItem>,
}

Defines the immutable part of a hit tester for a given scene. The hit tester is recreated each time a frame is built, since it relies on the current values of the spatial tree. However, the clip chain and item definitions don’t change, so they are created once per scene, and shared between hit tester instances via Arc.

Fields

clip_nodes: FastHashMap<ClipNodeId, HitTestClipNode>

items: Vec<HitTestingItem>

List of hit testing primitives.

Implementations

impl HitTestingScene

pub fn new(stats: &HitTestingSceneStats) -> Self

Construct a new hit testing scene, pre-allocating to size provided by previous scene stats.

pub fn get_stats(&self) -> HitTestingSceneStats

Get stats about the current scene allocation sizes.

fn add_clip_node( &mut self, clip_node_id: ClipNodeId, clip_tree_builder: &ClipTreeBuilder, interners: &Interners )

pub fn add_item( &mut self, tag: ItemTag, anim_id: u64, info: &LayoutPrimitiveInfo, spatial_node_index: SpatialNodeIndex, clip_node_id: ClipNodeId, clip_tree_builder: &ClipTreeBuilder, interners: &Interners )

Add a hit testing primitive.

Trait Implementations

impl MallocSizeOf for HitTestingScene

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.