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How to Use DXGI Factory 2 to Create Swap Chains with More Features


DXGI Factory 2: What Is It and How to Download It




If you are a Windows developer or gamer, you might have heard of DXGI, which stands for DirectX Graphics Infrastructure. DXGI is a set of interfaces and functions that enable applications to communicate with graphics hardware and manage resources. DXGI also provides features such as swap chains, adapters, outputs, modes, and surfaces.




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In this article, we will introduce you to DXGI Factory 2, which is a newer version of DXGI Factory that you can use to create other DXGI objects. DXGI Factory 2 has more features and capabilities than its predecessor, such as improved performance, compatibility, and debugging. We will also show you how to create, use, and download DXGI Factory 2 for your Windows applications.


How to Create a DXGI Factory 2 Object




To create a DXGI Factory 2 object, you need to use the CreateDXGIFactory2 function. This function accepts a flag indicating whether DXGIDebug.dll is loaded, which is useful for debugging purposes. The function also takes a globally unique identifier (GUID) of the IDXGIFactory2 interface and returns a pointer to an IDXGIFactory2 object.


The syntax and parameters of the CreateDXGIFactory2 function are as follows:


HRESULT CreateDXGIFactory2( UINT Flags, REFIID riid, [out] void ppFactory );


The Flags parameter can be either zero or DXGI_CREATE_FACTORY_DEBUG, which requests DXGIDebug.dll to be loaded if it is present on the system. The riid parameter is the GUID of the IDXGIFactory2 interface, which is 770AAE78-F26F-4DBA-A829-253C83D1B387. The ppFactory parameter is the address of a pointer to an IDXGIFactory2 object.


An example code snippet of how to use the CreateDXGIFactory2 function is as follows:


IDXGIFactory2* factory; HRESULT hr = CreateDXGIFactory2(0, IID_IDXGIFactory2, (void)&factory); if (SUCCEEDED(hr)) // Use the factory object here...


The CreateDXGIFactory2 function returns S_OK if successful; an error code otherwise. For a list of error codes, see . Some of the possible errors are:


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  • DXGI_ERROR_INVALID_CALL: The application has already created a factory.



  • DXGI_ERROR_NOT_FOUND: The requested interface is not supported.



  • E_OUTOFMEMORY: The system ran out of memory.



  • E_INVALIDARG: One or more arguments are invalid.



If an error occurs, you should release the factory object and handle the error accordingly.


How to Use a DXGI Factory 2 Object




Once you have created a DXGI Factory 2 object, you can use it to access the methods and properties of the IDXGIFactory2 interface. This interface inherits from the IDXGIFactory1 interface and provides additional features and capabilities for DXGI Factory 2.


The methods and properties of the IDXGIFactory2 interface are as follows:


Method/Property


Description


CreateSwapChainForHwnd


Creates a swap chain that is associated with an HWND handle.


CreateSwapChainForCoreWindow


Creates a swap chain that is associated with a CoreWindow object.


CreateSwapChainForComposition


Creates a swap chain that can be used for composition with other DirectComposition surfaces.


GetSharedResourceAdapterLuid


Gets the locally unique identifier (LUID) of the adapter that owns a shared resource.


RegisterStereoStatusWindow


Registers an application window to receive notifications of changes in stereo status.


RegisterStereoStatusEvent


Registers an event object to receive notifications of changes in stereo status.


UnregisterStereoStatus


Cancels the registration of an application window or event object for stereo status notifications.


RegisterOcclusionStatusWindow


Registers an application window to receive notifications of changes in occlusion status.


RegisterOcclusionStatusEvent


Registers an event object to receive notifications of changes in occlusion status.


UnregisterOcclusionStatus


Cancels the registration of an application window or event object for occlusion status notifications.



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[assistant](#message) IsWindowedStereoEnabled


Indicates whether the system supports stereo display mode.


CreateSwapChainForDComposition


Creates a swap chain that can be used for composition with other DirectComposition surfaces.


IsCurrent


Indicates whether the DXGI Factory 2 object was created with the current version of the operating system.


IsWindowed


Indicates whether the swap chain is in windowed mode.


GetWindowAssociation


Gets the window handle associated with the DXGI Factory 2 object.


MakeWindowAssociation


Sets the window handle associated with the DXGI Factory 2 object.


EnumAdapters1


Enumerates the adapters (video cards) available to the DXGI Factory 2 object.


EnumAdapters2


Enumerates the adapters (video cards) available to the DXGI Factory 2 object, including those that are not active.




An example code snippet of how to use the IDXGIFactory2 interface is as follows:


// Create a DXGI Factory 2 object IDXGIFactory2* factory; HRESULT hr = CreateDXGIFactory2(0, IID_IDXGIFactory2, (void)&factory); if (SUCCEEDED(hr)) // Create a swap chain for an HWND handle IDXGISwapChain1* swapChain; DXGI_SWAP_CHAIN_DESC1 desc = ; // Set the swap chain parameters here... hr = factory->CreateSwapChainForHwnd(device, hwnd, &desc, nullptr, nullptr, &swapChain); if (SUCCEEDED(hr)) // Use the swap chain here... // Enumerate the adapters available to the factory IDXGIAdapter1* adapter; UINT i = 0; while (factory->EnumAdapters1(i, &adapter) != DXGI_ERROR_NOT_FOUND) // Use the adapter here... i++;


How to Download DXGI Factory 2




If you want to use DXGI Factory 2 for your Windows applications, you need to make sure that you have the following requirements and compatibility:



  • You need to have Windows 8 or later installed on your system.



  • You need to have Visual Studio 2012 or later installed on your system.



  • You need to have DirectX SDK or Windows SDK installed on your system.



  • You need to have a graphics card that supports DirectX 11 or later.



You need to target your application for Windows Store or Windows Desktop


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