Add beginEvent and endEvent using DX12.

Author: borisrp

h2d/Scene.hx

@@ -785,6 +785,7 @@ class Scene extends Layers implements h3d.IDrawable implements hxd.SceneEvents.I
 		ctx.time += ctx.elapsedTime;
 		ctx.globalAlpha = alpha;
 		mark("s2d");
+		ctx.engine.driver.beginEvent("Render 2D");
 		sync(ctx);
 		if( children.length != 0 ) {
 			ctx.begin();
@@ -793,6 +794,7 @@ class Scene extends Layers implements h3d.IDrawable implements hxd.SceneEvents.I
 			#if sceneprof h3d.impl.SceneProf.end(); #end
 			ctx.end();
 		}
+		ctx.engine.driver.endEvent();
 		mark("vsync");
 	}
 

h3d/impl/DX12Driver.hx

@@ -2684,6 +2684,20 @@ class DX12Driver extends h3d.impl.Driver {
 		}
 	}
 
+	// MARKING
+
+	override function beginEvent( name : String ) {
+		#if heaps_debug_events
+		frame.commandList.pixBeginEvent(0, @:privateAccess name.bytes);
+		#end
+	}
+
+	override function endEvent() {
+		#if heaps_debug_events
+		frame.commandList.pixEndEvent();
+		#end
+	}
+
 	// QUERIES
 
 	static inline var QUERY_COUNT = 128;

h3d/impl/Driver.hx

@@ -294,6 +294,14 @@ class Driver {
 		return false;
 	}
 
+	// --- MARKING API
+
+	public function beginEvent( name : String ) {
+	}
+
+	public function endEvent() {
+	}
+
 	// --- QUERY API
 
 	public function allocQuery( queryKind : QueryKind ) : Query {

h3d/pass/Output.hx

@@ -80,6 +80,7 @@ class Output {
 	public function draw( passes : h3d.pass.PassList, ?sort : h3d.pass.PassList -> Void ) {
 		if( passes.isEmpty() )
 			return;
+		ctx.engine.driver.beginEvent(@:privateAccess passes.current.pass.name);
 		#if sceneprof
 		h3d.impl.SceneProf.begin('draw_${@:privateAccess passes.current.pass.name}', ctx.frame);
 		#end
@@ -118,6 +119,7 @@ class Output {
 			}
 			drawObject(p);
 		}
+		ctx.engine.driver.endEvent();
 		#if sceneprof h3d.impl.SceneProf.end(); #end
 		ctx.nextPass();
 	}

h3d/scene/Scene.hx

@@ -372,8 +372,10 @@ class Scene extends Object implements h3d.IDrawable implements hxd.SceneEvents.I
 		h3d.impl.SceneProf.end();
 		h3d.impl.SceneProf.begin("emit", ctx.frame);
 		#end
+		ctx.engine.driver.beginEvent("Emit");
 		mark("emit");
 		emitRec(ctx);
+		ctx.engine.driver.endEvent();
 		#if sceneprof h3d.impl.SceneProf.end(); #end
 
 		var passes = [];