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
use crate::buffer::BufferAccess;
use crate::buffer::TypedBufferAccess;
use crate::pipeline::shader::ShaderInterface;
use crate::pipeline::vertex::AttributeInfo;
use crate::pipeline::vertex::IncompatibleVertexDefinitionError;
use crate::pipeline::vertex::InputRate;
use crate::pipeline::vertex::Vertex;
use crate::pipeline::vertex::VertexDefinition;
use crate::pipeline::vertex::VertexSource;
use std::marker::PhantomData;
use std::mem;
use std::sync::Arc;
use std::vec::IntoIter as VecIntoIter;
pub struct OneVertexOneInstanceDefinition<T, U>(pub PhantomData<(T, U)>);
impl<T, U> OneVertexOneInstanceDefinition<T, U> {
#[inline]
pub fn new() -> OneVertexOneInstanceDefinition<T, U> {
OneVertexOneInstanceDefinition(PhantomData)
}
}
unsafe impl<T, U> VertexDefinition for OneVertexOneInstanceDefinition<T, U>
where
T: Vertex,
U: Vertex,
{
type BuffersIter = VecIntoIter<(u32, usize, InputRate)>;
type AttribsIter = VecIntoIter<(u32, u32, AttributeInfo)>;
fn definition(
&self,
interface: &ShaderInterface,
) -> Result<(Self::BuffersIter, Self::AttribsIter), IncompatibleVertexDefinitionError> {
let attrib = {
let mut attribs = Vec::with_capacity(interface.elements().len());
for e in interface.elements() {
let name = e.name.as_ref().unwrap();
let (infos, buf_offset) = if let Some(infos) = <T as Vertex>::member(name) {
(infos, 0)
} else if let Some(infos) = <U as Vertex>::member(name) {
(infos, 1)
} else {
return Err(IncompatibleVertexDefinitionError::MissingAttribute {
attribute: name.clone().into_owned(),
});
};
if !infos.ty.matches(
infos.array_size,
e.format,
e.location.end - e.location.start,
) {
return Err(IncompatibleVertexDefinitionError::FormatMismatch {
attribute: name.clone().into_owned(),
shader: (e.format, (e.location.end - e.location.start) as usize),
definition: (infos.ty, infos.array_size),
});
}
let mut offset = infos.offset;
for loc in e.location.clone() {
attribs.push((
loc,
buf_offset,
AttributeInfo {
offset: offset,
format: e.format,
},
));
offset += e.format.size().unwrap();
}
}
attribs
}
.into_iter();
let buffers = vec![
(0, mem::size_of::<T>(), InputRate::Vertex),
(1, mem::size_of::<U>(), InputRate::Instance),
]
.into_iter();
Ok((buffers, attrib))
}
}
unsafe impl<T, U> VertexSource<Vec<Arc<dyn BufferAccess + Send + Sync>>>
for OneVertexOneInstanceDefinition<T, U>
where
T: Vertex,
U: Vertex,
{
#[inline]
fn decode(
&self,
mut source: Vec<Arc<dyn BufferAccess + Send + Sync>>,
) -> (Vec<Box<dyn BufferAccess + Send + Sync>>, usize, usize) {
assert_eq!(source.len(), 2);
let len = source[0].size() / mem::size_of::<T>();
let inst = source[1].size() / mem::size_of::<U>();
let s0 = source.remove(0);
let s1 = source.remove(0);
(
vec![Box::new(s0) as Box<_>, Box::new(s1) as Box<_>],
len,
inst,
)
}
}
unsafe impl<'a, T, U, Bt, Bu> VertexSource<(Bt, Bu)> for OneVertexOneInstanceDefinition<T, U>
where
T: Vertex,
Bt: TypedBufferAccess<Content = [T]> + Send + Sync + 'static,
U: Vertex,
Bu: TypedBufferAccess<Content = [U]> + Send + Sync + 'static,
{
#[inline]
fn decode(&self, source: (Bt, Bu)) -> (Vec<Box<dyn BufferAccess + Send + Sync>>, usize, usize) {
let s1l = source.0.len();
let s2l = source.1.len();
(
vec![Box::new(source.0) as Box<_>, Box::new(source.1) as Box<_>],
s1l,
s2l,
)
}
}