Default to capturing with MTLCaptureScope

Author: christiangnrd

lib/mtl/capture.jl

@@ -12,6 +12,15 @@ Use [`beginScope()`](@ref) and [`endScope()`](@ref) to set the boundaries for a
 """
 MTLCaptureScope
 
+function MTLCaptureScope(queue::MTLDevice, manager=MTLCaptureManager())
+    handle = @objc [manager::id{MTLCaptureManager} newCaptureScopeWithDevice:queue::id{MTLDevice}]::id{MTLCaptureScope}
+    MTLCaptureScope(handle)
+end
+function MTLCaptureScope(queue::MTLCommandQueue, manager=MTLCaptureManager())
+    handle = @objc [manager::id{MTLCaptureManager} newCaptureScopeWithCommandQueue:queue::id{MTLCommandQueue}]::id{MTLCaptureScope}
+    MTLCaptureScope(handle)
+end
+
 # @objcwrapper MTLCaptureScope <: NSObject
 
 """
@@ -59,7 +68,7 @@ function MTLCaptureDescriptor()
 end
 
 # TODO: Add capture state
-function MTLCaptureDescriptor(obj::Union{MTLDevice,MTLCommandQueue, MTLCaptureScope},
+function MTLCaptureDescriptor(obj::Union{MTLDevice, MTLCommandQueue, MTLCaptureScope},
                               destination::MTLCaptureDestination;
                               folder::String=nothing)
     desc = MTLCaptureDescriptor()
@@ -110,7 +119,7 @@ end
 
 Start GPU frame capture using the default capture object and specifying capture descriptor parameters directly.
 """
-function startCapture(obj::Union{MTLDevice,MTLCommandQueue, MTLCaptureScope},
+function startCapture(obj::Union{MTLDevice, MTLCommandQueue, MTLCaptureScope},
                       destination::MTLCaptureDestination=MTLCaptureDestinationGPUTraceDocument;
                       folder::String=nothing)
     if destination == MTLCaptureDestinationGPUTraceDocument && folder === nothing

src/utilities.jl

@@ -137,10 +137,13 @@ function captured(f; dest=MTL.MTLCaptureDestinationGPUTraceDocument,
     end
 
     folder = capture_dir()
-    startCapture(object, dest; folder)
+    scope = MTLCaptureScope(object)
+    startCapture(scope, dest; folder)
     try
-       f()
-       synchronize()
+        beginScope(scope)
+        f()
+        endScope(scope)
+        synchronize()
     finally
         @info "GPU frame capture saved to $folder; open the resulting trace in Xcode"
         stopCapture()