From eff9a362bea9a8ad8b7c533bf34dd181c8097045 Mon Sep 17 00:00:00 2001
From: Michael Palmos <toqoz@hotmail.com>
Date: Sun, 10 Dec 2023 19:32:36 +1100
Subject: [PATCH] Add `COPY_SRC` to Metal's surface usage bits. (#4852)

---
 CHANGELOG.md                  | 4 ++++
 wgpu-hal/src/metal/adapter.rs | 4 +++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 00d53de0c2..4c33eef76b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -189,6 +189,10 @@ Passing an owned value `window` to `Surface` will return a `Surface<'static>`. S
 
 - Record the names of WGSL `alias` declarations in Naga IR `Type`s. By @jimblandy in [#4733](https://github.com/gfx-rs/wgpu/pull/4733).
 
+#### Metal
+
+- Allow the `COPY_SRC` usage flag in surface configuration. By @Toqozz in [#4852](https://github.com/gfx-rs/wgpu/pull/4852).
+
 ### Examples
 
 - remove winit dependency from hello-compute example by @psvri in [#4699](https://github.com/gfx-rs/wgpu/pull/4699)
diff --git a/wgpu-hal/src/metal/adapter.rs b/wgpu-hal/src/metal/adapter.rs
index c398b28583..3d8f6f3e57 100644
--- a/wgpu-hal/src/metal/adapter.rs
+++ b/wgpu-hal/src/metal/adapter.rs
@@ -339,7 +339,9 @@ impl crate::Adapter<super::Api> for super::Adapter {
             ],
 
             current_extent,
-            usage: crate::TextureUses::COLOR_TARGET | crate::TextureUses::COPY_DST, //TODO: expose more
+            usage: crate::TextureUses::COLOR_TARGET
+                | crate::TextureUses::COPY_SRC
+                | crate::TextureUses::COPY_DST,
         })
     }