Struct CompositorDisplayListInfo

pub struct CompositorDisplayListInfo {
    pub pipeline_id: PipelineId,
    pub viewport_details: ViewportDetails,
    pub content_size: LayoutSize,
    pub epoch: Epoch,
    pub scroll_tree: ScrollTree,
    pub root_reference_frame_id: ScrollTreeNodeId,
    pub root_scroll_node_id: ScrollTreeNodeId,
    pub is_contentful: bool,
    pub first_reflow: bool,
}

A data structure which stores compositor-side information about display lists sent to the compositor.

Fields

pipeline_id: PipelineId

The WebRender PipelineId of this display list.

viewport_details: ViewportDetails

The ViewportDetails that describe the viewport in the script/layout thread at the time this display list was created.

content_size: LayoutSize

The size of this display list’s content.

epoch: Epoch

The epoch of the display list.

scroll_tree: ScrollTree

A ScrollTree used by the compositor to scroll the contents of the display list.

root_reference_frame_id: ScrollTreeNodeId

The ScrollTreeNodeId of the root reference frame of this info’s scroll tree.

root_scroll_node_id: ScrollTreeNodeId

The ScrollTreeNodeId of the topmost scrolling frame of this info’s scroll tree.

is_contentful: bool

Contentful paint i.e. whether the display list contains items of type text, image, non-white canvas or SVG). Used by metrics. See https://w3c.github.io/paint-timing/#first-contentful-paint.

first_reflow: bool

Whether the first layout or a subsequent (incremental) layout triggered this display list creation.

Implementations

impl CompositorDisplayListInfo

pub fn new( viewport_details: ViewportDetails, content_size: LayoutSize, pipeline_id: PipelineId, epoch: Epoch, viewport_scroll_sensitivity: AxesScrollSensitivity, first_reflow: bool, ) -> Self

Create a new CompositorDisplayListInfo with the root reference frame and scroll frame already added to the scroll tree.

pub fn external_scroll_id_for_scroll_tree_node( &self, id: ScrollTreeNodeId, ) -> ExternalScrollId

Trait Implementations

impl Debug for CompositorDisplayListInfo

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CompositorDisplayListInfo

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl MallocSizeOf for CompositorDisplayListInfo

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.

impl Serialize for CompositorDisplayListInfo

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.