diff --git a/Source/Engine/Graphics/GPUDevice.cpp b/Source/Engine/Graphics/GPUDevice.cpp
index cdf1da0d3..5ea4914ba 100644
--- a/Source/Engine/Graphics/GPUDevice.cpp
+++ b/Source/Engine/Graphics/GPUDevice.cpp
@@ -298,6 +298,11 @@ bool GPUDevice::LoadContent()
     return false;
 }
 
+bool GPUDevice::CanDraw()
+{
+    return true;
+}
+
 void GPUDevice::preDispose()
 {
     RenderTargetPool::Flush();
@@ -449,6 +454,11 @@ void GPUDevice::Dispose()
     VideoOutputModes.Resize(0);
 }
 
+uint64 GPUDevice::GetMemoryUsage() const
+{
+    return Resources.GetMemoryUsage();
+}
+
 MaterialBase* GPUDevice::GetDefaultMaterial() const
 {
     return _res->DefaultMaterial;
diff --git a/Source/Engine/Graphics/GPUDevice.h b/Source/Engine/Graphics/GPUDevice.h
index e1deb16cc..8290df1aa 100644
--- a/Source/Engine/Graphics/GPUDevice.h
+++ b/Source/Engine/Graphics/GPUDevice.h
@@ -224,10 +224,7 @@ public:
     /// <summary>
     /// Gets the amount of memory usage by all the GPU resources (in bytes).
     /// </summary>
-    API_PROPERTY() FORCE_INLINE uint64 GetMemoryUsage() const
-    {
-        return Resources.GetMemoryUsage();
-    }
+    API_PROPERTY() uint64 GetMemoryUsage() const;
 
     /// <summary>
     /// Gets the default material.
@@ -287,10 +284,7 @@ public:
     /// Checks if GPU can render frame now (all data is ready), otherwise will skip frame rendering.
     /// </summary>
     /// <returns>True if skip rendering, otherwise false.</returns>
-    virtual bool CanDraw()
-    {
-        return true;
-    }
+    virtual bool CanDraw();
 
     /// <summary>
     /// Call frame rendering and process data using GPU
@@ -389,7 +383,7 @@ public:
 /// <summary>
 /// Utility structure to safety graphics device locking.
 /// </summary>
-struct GPUDeviceLock : NonCopyable
+struct FLAXENGINE_API GPUDeviceLock : NonCopyable
 {
     const GPUDevice* Device;