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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
// Copyright (C) 2019 Oscar Shrimpton
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
// You should have received a copy of the GNU General Public License along
// with this program. If not, see <http://www.gnu.org/licenses/>.
use std::iter::once;
use std::ops::{Index, IndexMut};
use std::convert::TryInto;
use core::mem::{ManuallyDrop, size_of};
use hal::prelude::*;
use hal::{
MemoryTypeId,
buffer::Usage,
memory::{Properties, Segment},
queue::Submission
};
use crate::error::CreationError;
use crate::types::*;
pub(crate) fn create_buffer(device: &mut Device,
adapter: &Adapter,
usage: Usage,
properties: Properties,
size: u64) -> Result<(Buffer, Memory), CreationError> {
let mut buffer = unsafe { device
.create_buffer(size, usage) }
.map_err(|e| CreationError::BufferError (e))?;
let requirements = unsafe { device.get_buffer_requirements(&buffer) };
let memory_type_id = adapter.physical_device
.memory_properties().memory_types
.iter().enumerate()
.find(|&(id, memory_type)| {
requirements.type_mask & (1 << id) != 0 && memory_type.properties.contains(properties)
})
.map(|(id, _)| MemoryTypeId(id))
.ok_or(CreationError::BufferNoMemory)?;
let memory = unsafe {device
.allocate_memory(memory_type_id, requirements.size) }
.map_err(|_| CreationError::OutOfMemoryError)?;
unsafe { device
.bind_buffer_memory(&memory, 0, &mut buffer) }
.map_err(|_| CreationError::BufferNoMemory)?;
Ok((buffer, memory))
}
pub trait ModifiableBuffer: IndexMut<usize> {
fn commit<'a>(&'a mut self, device: &Device,
command_queue: &mut CommandQueue,
command_pool: &mut CommandPool) -> &'a Buffer;
}
pub struct StagedBuffer<'a, T: Sized> {
staged_buffer: ManuallyDrop<Buffer>,
staged_memory: ManuallyDrop<Memory>,
buffer: ManuallyDrop<Buffer>,
memory: ManuallyDrop<Memory>,
staged_mapped_memory: &'a mut [T],
staged_is_dirty: bool,
pub highest_used: usize
}
impl<'a, T: Sized> StagedBuffer<'a, T> {
/// size is the size in T
pub fn new(device: &mut Device, adapter: &Adapter, usage: Usage, size: u64) -> Result<Self, CreationError> {
let size_bytes = size * size_of::<T>() as u64;
let (staged_buffer, staged_memory) = create_buffer(device, adapter, Usage::TRANSFER_SRC, Properties::CPU_VISIBLE, size_bytes)?;
let (buffer, memory) = create_buffer(device, adapter, Usage::TRANSFER_DST | usage, Properties::DEVICE_LOCAL, size_bytes)?;
// Map it somewhere and get a slice to that memory
let staged_mapped_memory = unsafe {
let ptr = device.map_memory(&staged_memory, Segment::ALL).unwrap(); // TODO
std::slice::from_raw_parts_mut(ptr as *mut T, size.try_into().unwrap())
};
Ok(StagedBuffer {
staged_buffer: ManuallyDrop::new(staged_buffer),
staged_memory: ManuallyDrop::new(staged_memory),
buffer: ManuallyDrop::new(buffer),
memory: ManuallyDrop::new(memory),
staged_mapped_memory,
staged_is_dirty: false,
highest_used: 0
})
}
pub(crate) fn deactivate(mut self, device: &mut Device) {
unsafe {
device.unmap_memory(&self.staged_memory);
device.free_memory(ManuallyDrop::take(&mut self.staged_memory));
device.destroy_buffer(ManuallyDrop::take(&mut self.staged_buffer));
device.free_memory(ManuallyDrop::take(&mut self.memory));
device.destroy_buffer(ManuallyDrop::take(&mut self.buffer));
};
}
}
impl <'a, T: Sized> ModifiableBuffer for StagedBuffer<'a, T> {
fn commit<'b>(&'b mut self, device: &Device,
command_queue: &mut CommandQueue,
command_pool: &mut CommandPool) -> &'b Buffer {
if self.staged_is_dirty {
// Flush mapped memory to ensure the staged buffer is filled
unsafe {
use std::ops::Deref;
device.flush_mapped_memory_ranges(once((self.staged_memory.deref(), Segment::ALL))).unwrap();
}
// Copy from staged to buffer
let buf = unsafe {
use hal::command::{CommandBufferFlags, BufferCopy};
// Get a command buffer
let mut buf = command_pool.allocate_one(hal::command::Level::Primary);
// Put in our copy command
buf.begin_primary(CommandBufferFlags::ONE_TIME_SUBMIT);
buf.copy_buffer(&self.staged_buffer, &self.buffer, &[
BufferCopy {
src: 0,
dst: 0,
size: ((self.highest_used + 1) * size_of::<T>()) as u64
}
]);
buf.finish();
buf
};
// Submit it and wait for completion
// TODO: We could use more semaphores or something?
// TODO: Better error handling
unsafe {
let copy_finished = device.create_fence(false).unwrap();
command_queue.submit::<_, _, Semaphore, _, _>(Submission {
command_buffers: &[&buf],
wait_semaphores: std::iter::empty::<_>(),
signal_semaphores: std::iter::empty::<_>()
}, Some(©_finished));
device
.wait_for_fence(©_finished, core::u64::MAX).unwrap();
// Destroy temporary resources
device.destroy_fence(copy_finished);
command_pool.free(once(buf));
}
self.staged_is_dirty = false;
}
&self.buffer
}
}
impl<'a, T: Sized> Index<usize> for StagedBuffer<'a, T> {
type Output = T;
fn index(&self, index: usize) -> &Self::Output {
&self.staged_mapped_memory[index]
}
}
impl<'a, T: Sized> IndexMut<usize> for StagedBuffer<'a, T> {
fn index_mut(&mut self, index: usize) -> &mut Self::Output {
self.staged_is_dirty = true;
if index > self.highest_used {
self.highest_used = index;
}
&mut self.staged_mapped_memory[index]
}
}
|
