Resolve a validation layer warnings on destruction order of Image/Buffer and bound DeviceMemory. (#1636)

RAII_Samples/06_InitDepthBuffer/06_InitDepthBuffer.cpp

@@ -92,6 +92,10 @@ int main( int /*argc*/, char ** /*argv*/ )
     vk::ImageViewCreateInfo imageViewCreateInfo( {}, *depthImage, vk::ImageViewType::e2D, depthFormat, {}, { vk::ImageAspectFlagBits::eDepth, 0, 1, 0, 1 } );
     vk::raii::ImageView     depthView( device, imageViewCreateInfo );
 
+    // while all vk::raii objects are automatically destroyed on scope leave, the Image should to be destroyed before the bound DeviceMemory
+    // but the standard destruction order would destroy the DeviceMemory before the Image, so destroy the Image here
+    depthImage.clear();
+
     /* VULKAN_HPP_KEY_END */
   }
   catch ( vk::SystemError & err )

RAII_Samples/07_InitUniformBuffer/07_InitUniformBuffer.cpp

@@ -78,6 +78,10 @@ int main( int /*argc*/, char ** /*argv*/ )
 
     uniformDataBuffer.bindMemory( *uniformDataMemory, 0 );
 
+    // while all vk::raii objects are automatically destroyed on scope leave, the Buffer should to be destroyed before the bound DeviceMemory
+    // but the standard destruction order would destroy the DeviceMemory before the Buffer, so destroy the Buffer here
+    uniformDataBuffer.clear();
+
     /* VULKAN_HPP_KEY_END */
   }
   catch ( vk::SystemError & err )

RAII_Samples/utils/utils.hpp

@@ -185,13 +185,13 @@ namespace vk
                     vk::BufferUsageFlags             usage,
                     vk::MemoryPropertyFlags          propertyFlags = vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent )
           : buffer( device, vk::BufferCreateInfo( {}, size, usage ) )
-          , deviceMemory( vk::raii::su::allocateDeviceMemory( device, physicalDevice.getMemoryProperties(), buffer.getMemoryRequirements(), propertyFlags ) )
 #if !defined( NDEBUG )
           , m_size( size )
           , m_usage( usage )
           , m_propertyFlags( propertyFlags )
 #endif
         {
+          deviceMemory = vk::raii::su::allocateDeviceMemory( device, physicalDevice.getMemoryProperties(), buffer.getMemoryRequirements(), propertyFlags );
           buffer.bindMemory( *deviceMemory, 0 );
         }
 
@@ -246,9 +246,10 @@ namespace vk
                                        { commandBuffer.copyBuffer( *stagingBuffer.buffer, *this->buffer, vk::BufferCopy( 0, 0, dataSize ) ); } );
         }
 
-        // the order of buffer and deviceMemory here is important to get the constructor running !
+        // the DeviceMemory should be destroyed before the Buffer it is bound to; to get that order with the standard destructor
-        vk::raii::Buffer       buffer       = nullptr;
+        // of the BufferData, the order of DeviceMemory and Buffer here matters
         vk::raii::DeviceMemory deviceMemory = nullptr;
+        vk::raii::Buffer       buffer       = nullptr;
 #if !defined( NDEBUG )
       private:
         vk::DeviceSize          m_size;
@@ -282,17 +283,19 @@ namespace vk
                      vk::SharingMode::eExclusive,
                      {},
                      initialLayout } )
-          , deviceMemory( vk::raii::su::allocateDeviceMemory( device, physicalDevice.getMemoryProperties(), image.getMemoryRequirements(), memoryProperties ) )
         {
+          deviceMemory = vk::raii::su::allocateDeviceMemory( device, physicalDevice.getMemoryProperties(), image.getMemoryRequirements(), memoryProperties );
           image.bindMemory( *deviceMemory, 0 );
           imageView = vk::raii::ImageView( device, vk::ImageViewCreateInfo( {}, *image, vk::ImageViewType::e2D, format, {}, { aspectMask, 0, 1, 0, 1 } ) );
         }
 
         ImageData( std::nullptr_t ) {}
 
+        // the DeviceMemory should be destroyed before the Image it is bound to; to get that order with the standard destructor
+        // of the ImageData, the order of DeviceMemory and Image here matters
         vk::Format             format;
-        vk::raii::Image        image        = nullptr;
         vk::raii::DeviceMemory deviceMemory = nullptr;
+        vk::raii::Image        image        = nullptr;
         vk::raii::ImageView    imageView    = nullptr;
       };
 

samples/06_InitDepthBuffer/06_InitDepthBuffer.cpp

@@ -89,10 +89,10 @@ int main( int /*argc*/, char ** /*argv*/ )
     vk::ImageView depthView = device.createImageView( vk::ImageViewCreateInfo(
       vk::ImageViewCreateFlags(), depthImage, vk::ImageViewType::e2D, depthFormat, {}, { vk::ImageAspectFlagBits::eDepth, 0, 1, 0, 1 } ) );
 
-    // destroy depthView, depthMemory, and depthImage
+    // destroy depthView, depthImage, and depthMemory
     device.destroyImageView( depthView );
+    device.destroyImage( depthImage );  // the Image should to be destroyed before the bound DeviceMemory is freed
     device.freeMemory( depthMemory );
-    device.destroyImage( depthImage );
 
     /* VULKAN_HPP_KEY_END */
 

samples/07_InitUniformBuffer/07_InitUniformBuffer.cpp

@@ -78,8 +78,8 @@ int main( int /*argc*/, char ** /*argv*/ )
     device.bindBufferMemory( uniformDataBuffer, uniformDataMemory, 0 );
 
     // free device memory and destroy buffer
+    device.destroyBuffer( uniformDataBuffer );  // the Buffer should be destroyed before the bound DeviceMemory is freed
     device.freeMemory( uniformDataMemory );
-    device.destroyBuffer( uniformDataBuffer );
 
     /* VULKAN_HPP_KEY_END */
 

samples/utils/utils.hpp

@@ -107,8 +107,8 @@ namespace vk
 
       void clear( vk::Device const & device )
       {
+        device.destroyBuffer( buffer );  // to prevent some validation layer warning, the Buffer needs to be destroyed before the bound DeviceMemory
         device.freeMemory( deviceMemory );
-        device.destroyBuffer( buffer );
       }
 
       template <typename DataType>
@@ -187,8 +187,8 @@ namespace vk
       void clear( vk::Device const & device )
       {
         device.destroyImageView( imageView );
+        device.destroyImage( image );  // the Image should to be destroyed before the bound DeviceMemory is freed
         device.freeMemory( deviceMemory );
-        device.destroyImage( image );
       }
 
       vk::Format       format;