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|
use crate::image::AtlasArray;
use iced_native::image;
use std::{
collections::{HashMap, HashSet},
};
use guillotiere::{Allocation, Size};
use debug_stub_derive::*;
#[derive(DebugStub)]
pub enum Memory {
Host(::image::ImageBuffer<::image::Bgra<u8>, Vec<u8>>),
Device {
layer: u32,
#[debug_stub="ReplacementValue"]
allocation: Allocation,
},
NotFound,
Invalid,
}
impl Memory {
pub fn dimensions(&self) -> (u32, u32) {
match self {
Memory::Host(image) => image.dimensions(),
Memory::Device { allocation, .. } => {
let size = &allocation.rectangle.size();
(size.width as u32, size.height as u32)
},
Memory::NotFound => (1, 1),
Memory::Invalid => (1, 1),
}
}
}
#[derive(Debug)]
pub struct Cache {
map: HashMap<u64, Memory>,
hits: HashSet<u64>,
}
impl Cache {
pub fn new() -> Self {
Self {
map: HashMap::new(),
hits: HashSet::new(),
}
}
pub fn load(&mut self, handle: &image::Handle) -> &mut Memory {
if self.contains(handle) {
return self.get(handle).unwrap();
}
let memory = match handle.data() {
image::Data::Path(path) => {
if let Ok(image) = ::image::open(path) {
Memory::Host(image.to_bgra())
} else {
Memory::NotFound
}
}
image::Data::Bytes(bytes) => {
if let Ok(image) = ::image::load_from_memory(&bytes) {
Memory::Host(image.to_bgra())
} else {
Memory::Invalid
}
}
};
self.insert(handle, memory);
self.get(handle).unwrap()
}
pub fn upload(
&mut self,
handle: &image::Handle,
device: &wgpu::Device,
encoder: &mut wgpu::CommandEncoder,
atlas_array: &mut AtlasArray,
) -> &Memory {
let _ = self.load(handle);
let memory = self.map.get_mut(&handle.id()).unwrap();
if let Memory::Host(image) = memory {
let (width, height) = image.dimensions();
let size = Size::new(width as i32, height as i32);
let (layer, allocation) = atlas_array.allocate(size).unwrap_or_else(|| {
atlas_array.grow(1, device, encoder);
atlas_array.allocate(size).unwrap()
});
let flat_samples = image.as_flat_samples();
let slice = flat_samples.as_slice();
atlas_array.upload(slice, layer, &allocation, device, encoder);
*memory = Memory::Device { layer, allocation };
}
memory
}
pub fn trim(&mut self, atlas_array: &mut AtlasArray) {
let hits = &self.hits;
for (id, mem) in &self.map {
if let Memory::Device { layer, allocation } = mem {
if !hits.contains(&id) {
atlas_array.deallocate(*layer, allocation);
}
}
}
self.map.retain(|k, _| hits.contains(k));
self.hits.clear();
}
fn get(&mut self, handle: &image::Handle) -> Option<&mut Memory> {
let _ = self.hits.insert(handle.id());
self.map.get_mut(&handle.id())
}
fn insert(&mut self, handle: &image::Handle, memory: Memory) {
let _ = self.map.insert(handle.id(), memory);
}
fn contains(&self, handle: &image::Handle) -> bool {
self.map.contains_key(&handle.id())
}
}
|
