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Implement Primitive::Cached

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This commit is contained in:
Héctor Ramón Jiménez 2020-03-07 23:45:54 +01:00
parent 37f0d97159
commit b74e7e7353
12 changed files with 151 additions and 105 deletions
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13
wgpu/src/widget/canvas/layer/cache.rs
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@ -3,8 +3,8 @@ use crate::{
Primitive,
};
use iced_native::{Point, Size};
use std::{cell::RefCell, marker::PhantomData};
use iced_native::Size;
use std::{cell::RefCell, marker::PhantomData, sync::Arc};
/// A simple cache that stores generated geometry to avoid recomputation.
///
@ -22,7 +22,10 @@ pub struct Cache<T: Drawable> {
#[derive(Debug)]
enum State {
Empty,
Filled { bounds: Size, primitive: Primitive },
Filled {
bounds: Size,
primitive: Arc<Primitive>,
},
}
impl<T> Cache<T>
@ -70,7 +73,7 @@ impl<'a, T> Layer for Bind<'a, T>
where
T: Drawable + std::fmt::Debug,
{
fn draw(&self, origin: Point, current_bounds: Size) -> Primitive {
fn draw(&self, current_bounds: Size) -> Arc<Primitive> {
use std::ops::Deref;
if let State::Filled { bounds, primitive } =
@ -84,7 +87,7 @@ where
let mut frame = Frame::new(current_bounds.width, current_bounds.height);
self.input.draw(&mut frame);
let primitive = frame.into_primitive(origin);
let primitive = Arc::new(frame.into_primitive());
*self.cache.state.borrow_mut() = State::Filled {
bounds: current_bounds,