add MTLLogStateDescriptor and MTLLogState

Author: tgymnich

lib/mtl/MTL.jl

@@ -34,6 +34,7 @@ include("events.jl")
 include("fences.jl")
 include("heap.jl")
 include("buffer.jl")
+include("log_state.jl")
 include("command_queue.jl")
 include("command_buf.jl")
 include("compute_pipeline.jl")

lib/mtl/log_state.jl

@@ -0,0 +1,39 @@
+export MTLLogLevel
+
+@cenum MTLLogLevel::NSInteger begin
+    MTLLogLevelUndefined = 0
+    MTLLogLevelDebug = 1
+    MTLLogLevelInfo = 2
+    MTLLogLevelNotice = 3
+    MTLLogLevelError = 4
+    MTLLogLevelFault = 5
+end
+
+export MTLLogStateDescriptor
+
+@objcwrapper immutable=false MTLLogStateDescriptor <: NSObject
+
+@objcproperties MTLLogStateDescriptor begin
+    @autoproperty level::MTLLogLevel setter=setLevel
+    @autoproperty bufferSize::NSInteger setter=setBufferSize
+end
+
+function MTLLogStateDescriptor()
+    handle = @objc [MTLLogStateDescriptor alloc]::id{MTLLogStateDescriptor}
+    obj = MTLLogStateDescriptor(handle)
+    finalizer(release, obj)
+    @objc [obj::id{MTLLogStateDescriptor} init]::id{MTLLogStateDescriptor}
+    return obj
+end
+
+
+export MTLLogState
+
+@objcwrapper MTLLogState <: NSObject
+
+function MTLLogState(dev::MTLDevice, descriptor::MTLLogStateDescriptor)
+    err = Ref{id{NSError}}(nil)
+    handle = @objc [dev::id{MTLDevice} newLogStateWithDescriptor:descriptor::id{MTLLogStateDescriptor} 
+                                       error:err::Ptr{id{NSError}}]::id{MTLLogState}
+    MTLLogState(handle)
+end