1 files changed, 104 insertions, 0 deletions
diff --git a/Runtime/Camera/RenderLayers/GUILayer.cpp b/Runtime/Camera/RenderLayers/GUILayer.cpp
new file mode 100644
index 0000000..69deeb8
--- /dev/null
+++ b/Runtime/Camera/RenderLayers/GUILayer.cpp
@@ -0,0 +1,104 @@
+#include "UnityPrefix.h"
+#include "GUILayer.h"
+#include "Runtime/Camera/Camera.h"
+#include "Runtime/Graphics/Transform.h"
+#include "Runtime/Camera/RenderManager.h"
+#include "Runtime/Math/Vector2.h"
+#include "Runtime/BaseClasses/Tags.h"
+#include "Runtime/Allocator/MemoryMacros.h"
+#include "Runtime/Profiler/ExternalGraphicsProfiler.h"
+
+PROFILER_INFORMATION(gGUILayerProfile, "Camera.GUILayer", kProfilerRender);
+
+GUILayer::GUIElements* GUILayer::ms_GUIElements = NULL;
+
+GUILayer::GUILayer(MemLabelId label, ObjectCreationMode mode)
+: Super(label, mode) 	
+{
+}
+
+GUILayer::~GUILayer ()
+{
+}
+
+inline bool SortGUIByDepth (GUIElement* lhs, GUIElement* rhs)
+{
+	return lhs->GetComponent (Transform).GetLocalPosition ().z < rhs->GetComponent (Transform).GetLocalPosition ().z;
+}
+
+void GUILayer::InitializeClass ()
+{
+	ms_GUIElements = new GUIElements;
+}
+
+void GUILayer::CleanupClass()
+{
+	delete ms_GUIElements;
+}
+
+
+void GUILayer::RenderGUILayer ()
+{
+	PROFILER_AUTO_GFX(gGUILayerProfile, this);
+	
+	ms_GUIElements->apply_delayed ();
+	if (ms_GUIElements->empty())
+		return;
+
+	typedef UNITY_TEMP_VECTOR(GUIElement*) TempElements;
+	TempElements elements (ms_GUIElements->begin (), ms_GUIElements->end ());
+	
+	std::sort (elements.begin (), elements.end (), SortGUIByDepth);
+
+	Camera& camera = GetComponent(Camera);
+	UInt32 cullingMask = camera.GetCullingMask ();
+	Rectf cameraRect = camera.GetScreenViewportRect();
+	
+	for (TempElements::iterator it=elements.begin(), itEnd = elements.end(); it != itEnd; ++it)
+	{
+		GUIElement& element = **it;
+		if (element.GetGameObject ().GetLayerMask () & cullingMask)
+			element.RenderGUIElement (cameraRect);
+	}
+}
+
+GUIElement* GUILayer::HitTest (const Vector2f& screenPosition)
+{
+	Camera& camera = GetComponent (Camera);
+	Vector3f viewportPos3D = camera.ScreenToViewportPoint (Vector3f (screenPosition.x, screenPosition.y, camera.GetNear()));
+	Vector2f viewportPos (viewportPos3D.x, viewportPos3D.y);
+	Rectf normalized (0.0F,0.0F,1.0F,1.0F);
+	
+	if (!normalized.Contains (viewportPos.x, viewportPos.y))
+		return NULL;
+
+	Rectf cameraRect = camera.GetScreenViewportRect();
+
+	Rectf windowRect = GetRenderManager ().GetWindowRect ();
+	viewportPos.x *= windowRect.Width ();
+	viewportPos.y *= windowRect.Height ();
+	
+	GUIElement* topmost = NULL;
+	float topmostZ = -std::numeric_limits<float>::infinity ();
+	
+	// GUI hit testing always ignores IgnoreRaycast layer
+	UInt32 cullingMask = camera.GetCullingMask() & ~(kIgnoreRaycastMask);
+
+	for (GUIElements::iterator it=ms_GUIElements->begin (), itEnd = ms_GUIElements->end (); it != itEnd; ++it)
+	{
+		GUIElement* element = *it;
+		if (element && (element->GetGameObject ().GetLayerMask () & cullingMask) && element->HitTest (viewportPos, cameraRect))
+		{
+			float z = element->GetComponent (Transform).GetLocalPosition ().z;
+			if (z > topmostZ)
+			{
+				topmost = element;
+				topmostZ = z;
+			}
+		}
+	}
+	
+	return topmost;
+}
+
+IMPLEMENT_CLASS_HAS_INIT(GUILayer)