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Optimize inserting lots of primitives with the same StackingOrder

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This commit is contained in:
Antonio Scandurra 2023-12-13 15:32:32 +01:00
parent 13c064186a
commit 801125974a
1 changed files with 21 additions and 8 deletions
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29
crates/gpui2/src/scene.rs
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@ -17,6 +17,7 @@ pub type LayerId = u32;
pub type DrawOrder = u32;
pub(crate) struct SceneBuilder {
last_order: Option<(StackingOrder, LayerId)>,
layers_by_order: BTreeMap<StackingOrder, LayerId>,
splitter: BspSplitter<(PrimitiveKind, usize)>,
shadows: Vec<Shadow>,
@ -31,6 +32,7 @@ pub(crate) struct SceneBuilder {
impl Default for SceneBuilder {
fn default() -> Self {
SceneBuilder {
last_order: None,
layers_by_order: BTreeMap::new(),
splitter: BspSplitter::new(),
shadows: Vec::new(),
@ -156,14 +158,7 @@ impl SceneBuilder {
return;
}
let layer_id = if let Some(layer_id) = self.layers_by_order.get(order) {
*layer_id
} else {
let next_id = self.layers_by_order.len() as LayerId;
self.layers_by_order.insert(order.clone(), next_id);
next_id
};
let layer_id = self.layer_id_for_order(order);
match primitive {
Primitive::Shadow(mut shadow) => {
shadow.order = layer_id;
@ -196,6 +191,24 @@ impl SceneBuilder {
}
}
}
fn layer_id_for_order(&mut self, order: &StackingOrder) -> u32 {
if let Some((last_order, last_layer_id)) = self.last_order.as_ref() {
if last_order == order {
return *last_layer_id;
}
};
let layer_id = if let Some(layer_id) = self.layers_by_order.get(order) {
*layer_id
} else {
let next_id = self.layers_by_order.len() as LayerId;
self.layers_by_order.insert(order.clone(), next_id);
next_id
};
self.last_order = Some((order.clone(), layer_id));
layer_id
}
}
pub struct Scene {