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|
use stockton_levels::prelude::HasTextures;
use super::{
block::TexturesBlock,
loader::{BlockRef, LoaderRequest, TextureLoader, TextureLoaderRemains, NUM_SIMULTANEOUS_CMDS},
resolver::TextureResolver,
LoadableImage,
};
use crate::types::*;
use std::{
collections::HashMap,
marker::PhantomData,
mem::drop,
mem::ManuallyDrop,
sync::{
mpsc::{channel, Receiver, Sender},
Arc, RwLock, RwLockReadGuard,
},
thread::JoinHandle,
};
use hal::{
prelude::*,
pso::{DescriptorSetLayoutBinding, DescriptorType, ShaderStageFlags},
Features,
};
use log::debug;
/// The number of textures in one 'block'
/// The textures of the loaded file are divided into blocks of this size.
/// Whenever a texture is needed, the whole block its in is loaded.
pub const BLOCK_SIZE: usize = 8;
pub struct TextureRepo<'a> {
joiner: ManuallyDrop<JoinHandle<Result<TextureLoaderRemains, &'static str>>>,
ds_layout: Arc<RwLock<DescriptorSetLayout>>,
req_send: Sender<LoaderRequest>,
resp_recv: Receiver<TexturesBlock<DynamicBlock>>,
blocks: HashMap<BlockRef, Option<TexturesBlock<DynamicBlock>>>,
_a: PhantomData<&'a ()>,
}
impl<'a> TextureRepo<'a> {
pub fn new<
T: 'static + HasTextures + Send + Sync,
R: 'static + TextureResolver<I> + Send + Sync,
I: 'static + LoadableImage + Send,
>(
device_lock: Arc<RwLock<Device>>,
adapter: &Adapter,
texs_lock: Arc<RwLock<T>>,
resolver: R,
) -> Result<Self, &'static str> {
let (req_send, req_recv) = channel();
let (resp_send, resp_recv) = channel();
let family = adapter
.queue_families
.iter()
.find(|family| {
family.queue_type().supports_transfer()
&& family.max_queues() >= NUM_SIMULTANEOUS_CMDS
})
.unwrap();
let gpu = unsafe {
adapter
.physical_device
.open(&[(family, &[1.0])], Features::empty())
.unwrap()
};
let device = device_lock.write().unwrap();
let ds_lock = Arc::new(RwLock::new(
unsafe {
device.create_descriptor_set_layout(
&[
DescriptorSetLayoutBinding {
binding: 0,
ty: DescriptorType::SampledImage,
count: BLOCK_SIZE,
stage_flags: ShaderStageFlags::FRAGMENT,
immutable_samplers: false,
},
DescriptorSetLayoutBinding {
binding: 1,
ty: DescriptorType::Sampler,
count: BLOCK_SIZE,
stage_flags: ShaderStageFlags::FRAGMENT,
immutable_samplers: false,
},
],
&[],
)
}
.map_err(|_| "Couldn't create descriptor set layout")?,
));
drop(device);
let joiner = {
let loader = TextureLoader::new(
device_lock,
adapter,
family.id(),
gpu,
ds_lock.clone(),
req_recv,
resp_send,
texs_lock,
resolver,
)?;
std::thread::spawn(move || loader.loop_forever())
};
Ok(TextureRepo {
joiner: ManuallyDrop::new(joiner),
ds_layout: ds_lock,
blocks: HashMap::new(),
req_send,
resp_recv,
_a: PhantomData::default(),
})
}
pub fn get_ds_layout(&self) -> RwLockReadGuard<DescriptorSetLayout> {
self.ds_layout.read().unwrap()
}
pub fn queue_load(&mut self, block_id: BlockRef) -> Result<(), &'static str> {
if self.blocks.contains_key(&block_id) {
return Ok(());
}
self.force_queue_load(block_id)
}
pub fn force_queue_load(&mut self, block_id: BlockRef) -> Result<(), &'static str> {
self.req_send
.send(LoaderRequest::Load(block_id))
.map_err(|_| "Couldn't send load request")?;
self.blocks.insert(block_id, None);
Ok(())
}
pub fn attempt_get_descriptor_set(&mut self, block_id: BlockRef) -> Option<&DescriptorSet> {
self.blocks
.get(&block_id)
.and_then(|opt| opt.as_ref().map(|z| z.descriptor_set.raw()))
}
pub fn process_responses(&mut self) {
let resp_iter: Vec<_> = self.resp_recv.try_iter().collect();
for resp in resp_iter {
debug!("Got block {:?} back from loader", resp.id);
self.blocks.insert(resp.id, Some(resp));
}
}
pub fn deactivate(mut self, device_lock: &mut Arc<RwLock<Device>>) {
unsafe {
use std::ptr::read;
// Join the loader thread
self.req_send.send(LoaderRequest::End).unwrap();
let mut remains = read(&*self.joiner).join().unwrap().unwrap();
// Process any ones that just got done loading
self.process_responses();
// Only now can we lock device without deadlocking
let mut device = device_lock.write().unwrap();
// Return all the texture memory and descriptors.
for (i, v) in self.blocks.drain() {
debug!("Deactivating blockref {:?}", i);
if let Some(block) = v {
block.deactivate(
&mut device,
&mut *remains.tex_allocator,
&mut remains.descriptor_allocator,
);
}
}
debug!("Deactivated all blocks");
// Dispose of both allocators
read(&*remains.tex_allocator).dispose();
read(&*remains.descriptor_allocator).dispose(&device);
debug!("Disposed of allocators");
}
}
}
|
