Struct GpuValueCache 

pub struct GpuValueCache {
    pub transform_keys: HashMap<NodeId, TransformKey>,
    pub current_transform_values: HashMap<NodeId, ComputedTransform3D>,
    pub h_transform_keys: HashMap<NodeId, TransformKey>,
    pub h_current_transform_values: HashMap<NodeId, ComputedTransform3D>,
    pub css_transform_keys: HashMap<NodeId, TransformKey>,
    pub css_current_transform_values: HashMap<NodeId, ComputedTransform3D>,
    pub opacity_keys: HashMap<NodeId, OpacityKey>,
    pub current_opacity_values: HashMap<NodeId, f32>,
    pub scrollbar_v_opacity_keys: HashMap<(DomId, NodeId), OpacityKey>,
    pub scrollbar_h_opacity_keys: HashMap<(DomId, NodeId), OpacityKey>,
    pub scrollbar_v_opacity_values: HashMap<(DomId, NodeId), f32>,
    pub scrollbar_h_opacity_values: HashMap<(DomId, NodeId), f32>,
}

Caches GPU transform and opacity keys and their current values for all nodes.

This cache stores the WebRender keys and computed values for nodes with CSS transforms or opacity. It’s synchronized with the StyledDom to detect changes and generate minimal update events.

Fields

transform_keys: HashMap<NodeId, TransformKey>

Vertical scrollbar thumb transform keys (keyed by scrollable node ID)

current_transform_values: HashMap<NodeId, ComputedTransform3D>

Current vertical scrollbar thumb transform values

h_transform_keys: HashMap<NodeId, TransformKey>

Horizontal scrollbar thumb transform keys (keyed by scrollable node ID)

h_current_transform_values: HashMap<NodeId, ComputedTransform3D>

Current horizontal scrollbar thumb transform values

css_transform_keys: HashMap<NodeId, TransformKey>

CSS transform keys (keyed by node ID) — for CSS transform property animation. Separate from scrollbar transform keys to avoid SpatialTreeItemKey collisions.

css_current_transform_values: HashMap<NodeId, ComputedTransform3D>

Current CSS transform values (keyed by node ID)

opacity_keys: HashMap<NodeId, OpacityKey>

CSS opacity keys (keyed by node ID)

current_opacity_values: HashMap<NodeId, f32>

Current CSS opacity values (keyed by node ID)

scrollbar_v_opacity_keys: HashMap<(DomId, NodeId), OpacityKey>

Vertical scrollbar opacity keys (keyed by DOM ID and scrollable node ID)

scrollbar_h_opacity_keys: HashMap<(DomId, NodeId), OpacityKey>

Horizontal scrollbar opacity keys (keyed by DOM ID and scrollable node ID)

scrollbar_v_opacity_values: HashMap<(DomId, NodeId), f32>

Current vertical scrollbar opacity values

scrollbar_h_opacity_values: HashMap<(DomId, NodeId), f32>

Current horizontal scrollbar opacity values

Implementations

impl GpuValueCache

pub fn empty() -> Self

Creates an empty GPU value cache.

pub fn synchronize(&mut self, styled_dom: &StyledDom) -> GpuEventChanges

Synchronizes the cache with the current StyledDom, generating change events for CSS transform and opacity additions, modifications, and removals.

Trait Implementations

impl Clone for GpuValueCache

fn clone(&self) -> GpuValueCache

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GpuValueCache

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

Formats the value using the given formatter.

impl Default for GpuValueCache

fn default() -> GpuValueCache

Returns the “default value” for a type.