add optional wgpu tracing feature

Cargo.toml

@@ -15,6 +15,7 @@ exclude = ["assets/**/*", "tools/**/*", ".github/**/*", "crates/**/*"]
 [features]
 default = ["bevy_audio", "bevy_gltf", "bevy_wgpu", "bevy_winit", "png", "hdr", "mp3"]
 profiler = ["bevy_ecs/profiler", "bevy_diagnostic/profiler"]
+wgpu_trace = ["bevy_wgpu/trace"]
 
 # Image format support for texture loading (PNG and HDR are enabled by default)
 png = ["bevy_render/png"]

crates/bevy_wgpu/Cargo.toml

@@ -11,6 +11,7 @@ keywords = ["bevy"]
 
 [features]
 default = ["bevy_winit"]
+trace = ["wgpu/trace"]
 
 [dependencies]
 # bevy

crates/bevy_wgpu/src/wgpu_renderer.rs

@@ -27,6 +27,11 @@ impl WgpuRenderer {
             .await
             .expect("Unable to find a GPU! Make sure you have installed required drivers!");
 
+        #[cfg(feature = "trace")]
+        let trace_path = Some(std::path::Path::new("wgpu_trace"));
+        #[cfg(not(feature = "trace"))]
+        let trace_path = None;
+
         let (device, queue) = adapter
             .request_device(
                 &wgpu::DeviceDescriptor {
@@ -34,7 +39,7 @@ impl WgpuRenderer {
                     limits: wgpu::Limits::default(),
                     shader_validation: true,
                 },
-                None,
+                trace_path,
             )
             .await
             .unwrap();