66 lines
1.7 KiB
Rust
66 lines
1.7 KiB
Rust
use ahash::AHashMap;
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use serde_derive::{Deserialize, Serialize};
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use crate::{math::Rect, paint::PaintCmd, Id};
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/// Different layer categories
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#[derive(Clone, Copy, Debug, Hash, Eq, PartialEq, Ord, PartialOrd, Deserialize, Serialize)]
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pub enum Order {
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/// Painted behind all floating windows
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Background,
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/// Normal moveable windows that you reorder by click
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Middle,
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/// Popups, menus etc that should always be painted on top of windows
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Foreground,
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/// Debug layer, always painted last / on top
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Debug,
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}
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/// An ideintifer for a paint layer.
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/// Also acts as an identifier for `Area`:s.
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#[derive(Clone, Copy, Debug, Hash, Eq, PartialEq, Deserialize, Serialize)]
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pub struct Layer {
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pub order: Order,
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pub id: Id,
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}
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impl Layer {
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pub fn debug() -> Self {
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Self {
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order: Order::Debug,
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id: Id::new("debug"),
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}
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}
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}
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/// Each `PaintCmd` is paired with a clip rectangle.
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type PaintList = Vec<(Rect, PaintCmd)>;
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/// TODO: improve this
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#[derive(Clone, Default)]
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pub struct GraphicLayers(AHashMap<Layer, PaintList>);
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impl GraphicLayers {
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pub fn layer(&mut self, layer: Layer) -> &mut PaintList {
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self.0.entry(layer).or_default()
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}
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pub fn drain(
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&mut self,
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area_order: &[Layer],
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) -> impl ExactSizeIterator<Item = (Rect, PaintCmd)> {
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let mut all_commands: Vec<_> = Default::default();
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for layer in area_order {
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if let Some(commands) = self.0.get_mut(layer) {
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all_commands.extend(commands.drain(..));
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}
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}
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if let Some(commands) = self.0.get_mut(&Layer::debug()) {
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all_commands.extend(commands.drain(..));
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}
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all_commands.into_iter()
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}
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}
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