I am working on a DirectX 11 app and I am having difficulties creating an instance of IDXGIFactory7. I could not find a CreateDXGIFactory7() function so I am using CreateDXGIFactory2() like this:
IDXGIFactory7* factory;
HRESULT hr = ::CreateDXGIFactory2(DXGI_CREATE_FACTORY_DEBUG, __uuidof(IDXGIFactory7), (void**)&factory);
The difficulty I am having is that this call throws an exception when attempting to use the graphics debugger in Visual Studio 2019. I also tried IDXGIFactory6 which also throws an exception. If I change it to IDXGIFactory2 it works and I can use the graphics debugger.
This code does run and debug fine using the regular debugger, but not the graphics debugger. I get the following exception:
Exception thrown at 0x00007FFAE1513B29 in DirectXTemplated.exe: Microsoft C++ exception: GRFXTool::ToolException at memory location 0x0000004D28BFE010.
I downloaded the sample from https://www.3dgep.com/introduction-to-directx-11/ and modified it to use IDXGIFactory7 and CreateDXGIFactory2() instead of IDXGIFactory in the QueryRefreshRate() function. You will need to set g_EnableVSync = TRUE at the top of main.cpp for it to create the factory. This does generate the exception when attempting to use the graphics debugger.
This is a Windows 10 Pro x64 installation with Visual Studio v16.7.6.
Based on the comment from Roman R., the way to get around the problem seems to be to use CreateDXGIFactory2() to create an IDXGIFactory2 and use QueryInterface() on that to obtain the one for IDXGIFactory7.
Doing it this way avoids the exception and the app runs under the graphics debugger without issue.