Enum GraphRebuildReason 

pub enum GraphRebuildReason {
    RootLayerUnavailable,
    DirtyLayerUnavailable,
    UnmatchedDirtyNodes(usize),
}

Why a scoped scene update could not be applied, forcing the caller to throw the render graph away and build it again from the applier.

The reason has to travel with the outcome because the shell picks the scoped path from the shape of the dirty set, before this code runs, and logs that choice. A frame that chose the scoped path and then rebuilt the whole scene is the expensive case, and in the log it reads exactly like a cheap patch – so the fallback says so itself.

Variants

RootLayerUnavailable

The root was dirty and its replacement layer could not be built.

DirtyLayerUnavailable

A dirty subtree’s replacement layer could not be built.

UnmatchedDirtyNodes(usize)

This many dirty nodes own no layer in the render graph, so the scoped walk never reached them. A node enters the graph only as a LayerNode; a dirty node that never produced one – or whose layer left the graph this frame – cannot be patched in place.

Trait Implementations

impl Clone for GraphRebuildReason

fn clone(&self) -> GraphRebuildReason

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for GraphRebuildReason

impl Debug for GraphRebuildReason

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

Formats the value using the given formatter.

impl Eq for GraphRebuildReason

impl PartialEq for GraphRebuildReason

fn eq(&self, other: &GraphRebuildReason) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for GraphRebuildReason