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

// Copyright (c) 2016 The vulkano developers
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT
// license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
// at your option. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.

use descriptor::descriptor::DescriptorDesc;
use descriptor::descriptor_set::DescriptorSet;
use descriptor::descriptor_set::DescriptorSetDesc;

/// A collection of descriptor set objects.
pub unsafe trait DescriptorSetsCollection {
    fn into_vec(self) -> Vec<Box<dyn DescriptorSet + Send + Sync>>;

    /// Returns the number of descriptors in the set. Includes possibly empty descriptors.
    ///
    /// Returns `None` if the set is out of range.
    // TODO: remove ; user should just use `into_vec` instead
    fn num_bindings_in_set(&self, set: usize) -> Option<usize>;

    /// Returns the descriptor for the given binding of the given set.
    ///
    /// Returns `None` if out of range.
    // TODO: remove ; user should just use `into_vec` instead
    fn descriptor(&self, set: usize, binding: usize) -> Option<DescriptorDesc>;
}

unsafe impl DescriptorSetsCollection for () {
    #[inline]
    fn into_vec(self) -> Vec<Box<dyn DescriptorSet + Send + Sync>> {
        vec![]
    }

    #[inline]
    fn num_bindings_in_set(&self, _: usize) -> Option<usize> {
        None
    }

    #[inline]
    fn descriptor(&self, _: usize, _: usize) -> Option<DescriptorDesc> {
        None
    }
}

unsafe impl<T> DescriptorSetsCollection for T
    where T: DescriptorSet + Send + Sync + 'static
{
    #[inline]
    fn into_vec(self) -> Vec<Box<dyn DescriptorSet + Send + Sync>> {
        vec![Box::new(self) as Box<_>]
    }

    #[inline]
    fn num_bindings_in_set(&self, set: usize) -> Option<usize> {
        match set {
            0 => Some(self.num_bindings()),
            _ => None,
        }
    }

    #[inline]
    fn descriptor(&self, set: usize, binding: usize) -> Option<DescriptorDesc> {
        match set {
            0 => self.descriptor(binding),
            _ => None,
        }
    }
}

unsafe impl<T> DescriptorSetsCollection for Vec<T>
    where T: DescriptorSet + Send + Sync + 'static
{
    #[inline]
    fn into_vec(self) -> Vec<Box<dyn DescriptorSet + Send + Sync>> {
        let mut v = Vec::new();
        for o in self {
            v.push(Box::new(o) as Box<_>);
        }
        return v;
    }

    #[inline]
    fn num_bindings_in_set(&self, set: usize) -> Option<usize> {
        self.get(set).map(|x| x.num_bindings())
    }
    #[inline]
    fn descriptor(&self, set: usize, binding: usize) -> Option<DescriptorDesc> {
        self.get(set).and_then(|x| x.descriptor(binding))
    }
}

macro_rules! impl_collection {
    ($first:ident $(, $others:ident)+) => (
        unsafe impl<$first$(, $others)+> DescriptorSetsCollection for ($first, $($others),+)
            where $first: DescriptorSet + DescriptorSetDesc + Send + Sync + 'static
                  $(, $others: DescriptorSet + DescriptorSetDesc + Send + Sync + 'static)*
        {
            #[inline]
            fn into_vec(self) -> Vec<Box<dyn DescriptorSet + Send + Sync>> {
                #![allow(non_snake_case)]

                let ($first, $($others,)*) = self;

                let mut list = Vec::new();
                list.push(Box::new($first) as Box<_>);
                $(
                    list.push(Box::new($others) as Box<_>);
                )+
                list
            }

            #[inline]
            fn num_bindings_in_set(&self, mut set: usize) -> Option<usize> {
                #![allow(non_snake_case)]
                #![allow(unused_mut)]       // For the `set` parameter.

                if set == 0 {
                    return Some(self.0.num_bindings());
                }

                let &(_, $(ref $others,)*) = self;

                $(
                    set -= 1;
                    if set == 0 {
                        return Some($others.num_bindings());
                    }
                )*

                None
            }

            #[inline]
            fn descriptor(&self, mut set: usize, binding: usize) -> Option<DescriptorDesc> {
                #![allow(non_snake_case)]
                #![allow(unused_mut)]       // For the `set` parameter.

                if set == 0 {
                    return self.0.descriptor(binding);
                }

                let &(_, $(ref $others,)*) = self;

                $(
                    set -= 1;
                    if set == 0 {
                        return $others.descriptor(binding);
                    }
                )*

                None
            }
        }

        impl_collection!($($others),+);
    );

    ($i:ident) => ();
}

impl_collection!(Z,
                 Y,
                 X,
                 W,
                 V,
                 U,
                 T,
                 S,
                 R,
                 Q,
                 P,
                 O,
                 N,
                 M,
                 L,
                 K,
                 J,
                 I,
                 H,
                 G,
                 F,
                 E,
                 D,
                 C,
                 B,
                 A);