Method createBuffer

source/RenderGraph/ResourceHandler.cpp:165–222

	}

	ResourceHandler::CreatedT< VkBuffer > ResourceHandler::createBuffer( GraphContext & context
		, BufferId bufferId )
	{
		ResourceHandler::CreatedT< VkBuffer > result{};

		if ( context.vkCreateBuffer )
		{
			lock_type lock( m_buffersMutex );
			auto [it, ins] = m_buffers.try_emplace( bufferId, std::pair< VkBuffer, VkDeviceMemory >{} );

			if ( ins && context.device )
			{
				// Create buffer
				auto createInfo = reshdl::convert( *bufferId.data );
				auto res = context.vkCreateBuffer( context.device
					, &createInfo
					, context.allocator
					, &it->second.first );
				result.resource = it->second.first;
				checkVkResult( res, "Buffer creation" );
				crgRegisterObjectName( context, bufferId.data->name, result.resource );

				// Create Buffer memory
				VkMemoryRequirements requirements{};
				context.vkGetBufferMemoryRequirements( context.device
					, result.resource
					, &requirements );
				uint32_t deduced = context.deduceMemoryType( requirements.memoryTypeBits
					, getMemoryPropertyFlags( bufferId.data->info.memory ) );
				VkMemoryAllocateInfo allocateInfo{ VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO
					, nullptr
					, requirements.size
					, deduced };
				res = context.vkAllocateMemory( context.device
					, &allocateInfo
					, context.allocator
					, &it->second.second );
				result.memory = it->second.second;
				checkVkResult( res, "Buffer memory allocation" );
				crgRegisterObjectName( context, bufferId.data->name, result.memory );

				// Bind buffer and memory
				res = context.vkBindBufferMemory( context.device
					, result.resource
					, result.memory
					, 0u );
				checkVkResult( res, "Buffer memory binding" );
				result.created = true;
			}
			else
			{
				result.resource = it->second.first;
				result.memory = it->second.second;
			}
		}

		return result;
	}