StratoSDK is a framework with a declarative approach similar to Flutter/React, written and designed entirely for Rust.
| 1 | use crate::rendering::wgpu::{Renderer, Resources}; |
| 2 | use crate::rendering::GlyphConfig; |
| 3 | use pathfinder_geometry::vector::Vector2F; |
| 4 | use std::collections::HashMap; |
| 5 | use std::hash::{DefaultHasher, Hash, Hasher}; |
| 6 | use wgpu::Device; |
| 7 | |
| 8 | pub struct RendererManager { |
| 9 | renderers: HashMap<DeviceID, Renderer>, |
| 10 | } |
| 11 | |
| 12 | #[derive(Copy, Clone, Hash, Eq, PartialEq)] |
| 13 | struct DeviceID(u64); |
| 14 | |
| 15 | impl From<&Device> for DeviceID { |
| 16 | fn from(value: &Device) -> Self { |
| 17 | let mut s = DefaultHasher::new(); |
| 18 | value.hash(&mut s); |
| 19 | DeviceID(s.finish()) |
| 20 | } |
| 21 | } |
| 22 | |
| 23 | impl RendererManager { |
| 24 | pub fn new() -> Self { |
| 25 | Self { |
| 26 | renderers: Default::default(), |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | /// Returns a [`Renderer`] identified by the device contained in [`Resources`]. |
| 31 | pub fn renderer_for_resources( |
| 32 | &mut self, |
| 33 | resources: &Resources, |
| 34 | _window_size: Vector2F, |
| 35 | ) -> &mut Renderer { |
| 36 | use std::collections::hash_map::Entry::*; |
| 37 | match self.renderers.entry((&resources.device).into()) { |
| 38 | Occupied(entry) => entry.into_mut(), |
| 39 | Vacant(entry) => entry.insert(Renderer::new(resources, GlyphConfig::default())), |
| 40 | } |
| 41 | } |
| 42 | } |
| 43 |