[FEATURE] Add swapchain skeleton classes

src/anki/gr/vulkan/SwapchainFactory.cpp

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+// Copyright (C) 2009-2017, Panagiotis Christopoulos Charitos and contributors.
+// All rights reserved.
+// Code licensed under the BSD License.
+// http://www.anki3d.org/LICENSE
+
+#include <anki/gr/vulkan/SwapchainFactory.h>

src/anki/gr/vulkan/SwapchainFactory.h

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+// Copyright (C) 2009-2017, Panagiotis Christopoulos Charitos and contributors.
+// All rights reserved.
+// Code licensed under the BSD License.
+// http://www.anki3d.org/LICENSE
+
+#pragma once
+
+#include <anki/gr/vulkan/FenceFactory.h>
+#include <anki/util/Ptr.h>
+
+namespace anki
+{
+
+// Forward
+class SwapchainFactory;
+
+/// @addtogroup vulkan
+/// @{
+
+/// A wrapper for the swapchain.
+class MicroSwapchain
+{
+public:
+	VkSwapchainKHR m_swapchain = VK_NULL_HANDLE;
+
+	Array<VkImage, MAX_FRAMES_IN_FLIGHT> m_image = {};
+	Array<VkImageView, MAX_FRAMES_IN_FLIGHT> m_imageView = {};
+
+	MicroSwapchain(SwapchainFactory* factory);
+
+	~MicroSwapchain();
+
+	Atomic<U32>& getRefcount()
+	{
+		return m_refcount;
+	}
+
+	GrAllocator<U8> getAllocator() const;
+
+private:
+	Atomic<U32> m_refcount = {0};
+	SwapchainFactory* m_factory = nullptr;
+};
+
+/// Deleter for MicroSwapchainPtr smart pointer.
+class MicroSwapchainPtrDeleter
+{
+public:
+	void operator()(MicroSwapchain* x);
+};
+
+/// MicroSwapchain smart pointer.
+using MicroSwapchainPtr = IntrusivePtr<MicroSwapchain, MicroSwapchainPtrDeleter>;
+/// @}
+
+} // end namespace anki