rafx-assets 0.0.12

Rendering framework built on an extensible asset pipeline
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178

use crate::resource_loader::ResourceLoadResult;
use crate::ResourceLoader;
use crossbeam_channel::{Receiver, Sender};
use distill::loader::storage::AssetLoadOp;
use distill::loader::LoadHandle;
use std::marker::PhantomData;
use type_uuid::TypeUuid;

//
// Message handling for asset load/commit/free events
//
pub struct LoadRequest<AssetDataT, AssetT> {
    pub load_handle: LoadHandle,
    pub load_op: AssetLoadOp,
    pub result_tx: Sender<AssetT>,
    pub asset: AssetDataT,
}

pub struct CommitRequest<T> {
    pub load_handle: LoadHandle,
    phantom_data: PhantomData<T>,
}

pub struct FreeRequest<T> {
    pub load_handle: LoadHandle,
    phantom_data: PhantomData<T>,
}

pub struct LoadQueuesTx<AssetDataT, AssetT> {
    load_request_tx: Sender<LoadRequest<AssetDataT, AssetT>>,
    commit_request_tx: Sender<CommitRequest<AssetDataT>>,
    free_request_tx: Sender<FreeRequest<AssetDataT>>,
}

impl<AssetDataT, AssetT> Clone for LoadQueuesTx<AssetDataT, AssetT> {
    fn clone(&self) -> Self {
        LoadQueuesTx {
            load_request_tx: self.load_request_tx.clone(),
            commit_request_tx: self.commit_request_tx.clone(),
            free_request_tx: self.free_request_tx.clone(),
        }
    }
}

pub struct LoadQueuesRx<AssetDataT, AssetT> {
    load_request_rx: Receiver<LoadRequest<AssetDataT, AssetT>>,
    commit_request_rx: Receiver<CommitRequest<AssetDataT>>,
    free_request_rx: Receiver<FreeRequest<AssetDataT>>,
}

pub struct LoadQueues<AssetDataT, AssetT> {
    tx: LoadQueuesTx<AssetDataT, AssetT>,
    rx: LoadQueuesRx<AssetDataT, AssetT>,
}

impl<AssetDataT, AssetT> LoadQueues<AssetDataT, AssetT> {
    pub fn take_load_requests(&mut self) -> Vec<LoadRequest<AssetDataT, AssetT>> {
        self.rx.load_request_rx.try_iter().collect()
    }

    pub fn take_commit_requests(&mut self) -> Vec<CommitRequest<AssetDataT>> {
        self.rx.commit_request_rx.try_iter().collect()
    }

    pub fn take_free_requests(&mut self) -> Vec<FreeRequest<AssetDataT>> {
        self.rx.free_request_rx.try_iter().collect()
    }
}

impl<AssetDataT, AssetT> LoadQueues<AssetDataT, AssetT>
where
    AssetDataT: for<'a> serde::Deserialize<'a> + 'static + Send + Clone,
    AssetT: TypeUuid + 'static + Send,
{
    pub fn create_loader(&self) -> GenericLoader<AssetDataT, AssetT> {
        GenericLoader {
            load_queues: self.tx.clone(),
        }
    }
}

impl<AssetDataT, AssetT> Default for LoadQueues<AssetDataT, AssetT> {
    fn default() -> Self {
        let (load_request_tx, load_request_rx) = crossbeam_channel::unbounded();
        let (commit_request_tx, commit_request_rx) = crossbeam_channel::unbounded();
        let (free_request_tx, free_request_rx) = crossbeam_channel::unbounded();

        let tx = LoadQueuesTx {
            load_request_tx,
            commit_request_tx,
            free_request_tx,
        };

        let rx = LoadQueuesRx {
            load_request_rx,
            commit_request_rx,
            free_request_rx,
        };

        LoadQueues { tx, rx }
    }
}

//
// A generic load handler that allows routing load/commit/free events
//
pub struct GenericLoader<AssetDataT, AssetT>
where
    AssetDataT: for<'a> serde::Deserialize<'a> + 'static + Send,
    AssetT: TypeUuid + 'static + Send,
{
    load_queues: LoadQueuesTx<AssetDataT, AssetT>,
}

impl<AssetDataT, AssetT> ResourceLoader<AssetDataT, AssetT> for GenericLoader<AssetDataT, AssetT>
where
    AssetDataT: for<'a> serde::Deserialize<'a> + 'static + Send,
    AssetT: TypeUuid + 'static + Send,
{
    fn update_asset(
        &mut self,
        load_handle: LoadHandle,
        load_op: AssetLoadOp,
        asset: AssetDataT,
    ) -> ResourceLoadResult<AssetT> {
        log::trace!(
            "GenericLoader update_asset {} {:?}",
            core::any::type_name::<AssetDataT>(),
            load_handle
        );

        let (result_tx, result_rx) = crossbeam_channel::bounded(1);

        let request = LoadRequest {
            load_handle,
            load_op,
            result_tx,
            asset,
        };

        self.load_queues.load_request_tx.send(request).unwrap();
        ResourceLoadResult::new(result_rx)
    }

    fn commit_asset_version(
        &mut self,
        load_handle: LoadHandle,
    ) {
        log::trace!(
            "GenericLoader commit_asset_version {} {:?}",
            core::any::type_name::<AssetDataT>(),
            load_handle
        );
        let request = CommitRequest {
            load_handle,
            phantom_data: Default::default(),
        };

        self.load_queues.commit_request_tx.send(request).unwrap();
    }

    fn free(
        &mut self,
        load_handle: LoadHandle,
    ) {
        log::trace!(
            "GenericLoader free {} {:?}",
            core::any::type_name::<AssetDataT>(),
            load_handle
        );
        let request = FreeRequest {
            load_handle,
            phantom_data: Default::default(),
        };

        self.load_queues.free_request_tx.send(request).unwrap();
    }
}