diff --git a/example/Vulkan/RenderSurfaceAttribute.cpp b/example/Vulkan/RenderSurfaceAttribute.cpp
index 551779b1..e9b2c87e 100644
--- a/example/Vulkan/RenderSurfaceAttribute.cpp
+++ b/example/Vulkan/RenderSurfaceAttribute.cpp
@@ -166,4 +166,24 @@ RenderSurfaceAttribute::~RenderSurfaceAttribute()
     if(surface)
         vkDestroySurfaceKHR(instance,surface,nullptr);
 }
+
+bool RenderSurfaceAttribute::CheckMemoryType(uint32_t typeBits,VkFlags requirements_mask,uint32_t *typeIndex)
+{
+    // Search memtypes to find first index with those properties
+    for(uint32_t i=0; i<memory_properties.memoryTypeCount; i++)
+    {
+        if((typeBits&1)==1)
+        {
+            // Type is available, does it match user properties?
+            if((memory_properties.memoryTypes[i].propertyFlags&requirements_mask)==requirements_mask)
+            {
+                *typeIndex=i;
+                return true;
+            }
+        }
+        typeBits>>=1;
+    }
+    // No memory types matched, return failure
+    return false;
+}
 VK_NAMESPACE_END
diff --git a/example/Vulkan/RenderSurfaceAttribute.h b/example/Vulkan/RenderSurfaceAttribute.h
index 7730173a..5e7783ec 100644
--- a/example/Vulkan/RenderSurfaceAttribute.h
+++ b/example/Vulkan/RenderSurfaceAttribute.h
@@ -51,5 +51,7 @@ public:
 
     RenderSurfaceAttribute(VkInstance inst,VkPhysicalDevice pd,VkSurfaceKHR s);
     ~RenderSurfaceAttribute();
+
+    bool CheckMemoryType(uint32_t,VkFlags,uint32_t *);
 };//class RenderSurfaceAttribute
 VK_NAMESPACE_END
diff --git a/example/Vulkan/RenderSurfaceCreater.cpp b/example/Vulkan/RenderSurfaceCreater.cpp
index 85fa7a60..a0a619fc 100644
--- a/example/Vulkan/RenderSurfaceCreater.cpp
+++ b/example/Vulkan/RenderSurfaceCreater.cpp
@@ -171,27 +171,7 @@ namespace
 
         return(true);
     }
-
-    bool memory_type_from_properties(VkPhysicalDeviceMemoryProperties memory_properties,uint32_t typeBits,VkFlags requirements_mask,uint32_t *typeIndex)
-    {
-        // Search memtypes to find first index with those properties
-        for(uint32_t i=0; i<memory_properties.memoryTypeCount; i++)
-        {
-            if((typeBits&1)==1)
-            {
-                // Type is available, does it match user properties?
-                if((memory_properties.memoryTypes[i].propertyFlags&requirements_mask)==requirements_mask)
-                {
-                    *typeIndex=i;
-                    return true;
-                }
-            }
-            typeBits>>=1;
-        }
-        // No memory types matched, return failure
-        return false;
-    }
-
+    
     bool CreateDepthBuffer(RenderSurfaceAttribute *rsa)
     {
         VkImageCreateInfo image_info={};
@@ -258,7 +238,8 @@ namespace
         mem_alloc.memoryTypeIndex=0;
         mem_alloc.allocationSize=mem_reqs.size;
 
-        bool pass=memory_type_from_properties(rsa->memory_properties,mem_reqs.memoryTypeBits,VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,&mem_alloc.memoryTypeIndex);
+        if(!rsa->CheckMemoryType(mem_reqs.memoryTypeBits,VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,&mem_alloc.memoryTypeIndex))
+            return(false);
 
         if(vkAllocateMemory(rsa->device,&mem_alloc,nullptr,&rsa->depth.mem)!=VK_SUCCESS)
             return(false);