From dd582e224d97c984e9119b576daa03a5811e2750 Mon Sep 17 00:00:00 2001
From: Jim Blandy <jimb@red-bean.com>
Date: Mon, 4 Sep 2023 14:05:21 -0700
Subject: [PATCH] wgpu_core: Add logging to Instance::new.

For each backend `blah`, log::debug/trace whether we were able to
populate `Instance::blah`.
---
 wgpu-core/src/instance.rs | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/wgpu-core/src/instance.rs b/wgpu-core/src/instance.rs
index ae1a395d85..0aee56ac6e 100644
--- a/wgpu-core/src/instance.rs
+++ b/wgpu-core/src/instance.rs
@@ -84,8 +84,22 @@ impl Instance {
                     dx12_shader_compiler: instance_desc.dx12_shader_compiler.clone(),
                     gles_minor_version: instance_desc.gles_minor_version,
                 };
-                unsafe { hal::Instance::init(&hal_desc).ok() }
+                match unsafe { hal::Instance::init(&hal_desc) } {
+                    Ok(instance) => {
+                        log::debug!("Instance::new: created {:?} backend", A::VARIANT);
+                        Some(instance)
+                    }
+                    Err(err) => {
+                        log::debug!(
+                            "Instance::new: failed to create {:?} backend: {:?}",
+                            A::VARIANT,
+                            err
+                        );
+                        None
+                    }
+                }
             } else {
+                log::trace!("Instance::new: backend {:?} not requested", A::VARIANT);
                 None
             }
         }