From 7189c7fa842e5bb6df2918b89d1ac73763261a18 Mon Sep 17 00:00:00 2001
From: Jonathan Steyfkens <jonathansty@users.noreply.github.com>
Date: Sun, 28 Oct 2018 07:47:20 +0000
Subject: [PATCH] Impl DescriptorSetCollection for vec (#1094)

---
 CHANGELOG.md                                  |  1 +
 .../descriptor/descriptor_set/collection.rs   | 22 +++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 96c9b6ae..aaaa68bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@
 - Use [google/shaderc](https://github.com/google/shaderc-rs) for shader compilation
 - Reject generation of rust types for SPIR-V arrays that would have incorrect array stride.
 - Removed the `Layout` prefix of the descriptions used for a render pass.
+- Implemented DescriptorSetCollection for `Vec<T>` which allows easier use of construction them for usage when drawing.
 
 # Version 0.10.0 (2018-08-10)
 
diff --git a/vulkano/src/descriptor/descriptor_set/collection.rs b/vulkano/src/descriptor/descriptor_set/collection.rs
index c5014bfb..3d23a571 100644
--- a/vulkano/src/descriptor/descriptor_set/collection.rs
+++ b/vulkano/src/descriptor/descriptor_set/collection.rs
@@ -70,6 +70,28 @@ unsafe impl<T> DescriptorSetsCollection for T
     }
 }
 
+unsafe impl<T> DescriptorSetsCollection for Vec<T>
+    where T: DescriptorSet + Send + Sync + 'static
+{
+    #[inline]
+    fn into_vec(self) -> Vec<Box<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),+)