Weird artefact when rendering with D3D11

Looks like tearing. Does this happen with all scenes or just this one character?

Are you using the sync-related methods correctly?

https://docs.microsoft.com/en-us/windows/win32/api/dxgi/nf-dxgi-idxgiswapchain-present

https://docs.microsoft.com/en-us/windows/win32/api/d3d11/nf-d3d11-d3d11createdeviceandswapchain

Seems like it, I use the following parameters for creating the swap chain:

DXGI_SWAP_CHAIN_DESC SwapChainDesc;
SwapChainDesc.BufferDesc.Width                   = BufferWidth;
SwapChainDesc.BufferDesc.Height                  = BufferHeight;
SwapChainDesc.BufferDesc.RefreshRate.Numerator   = 1;
SwapChainDesc.BufferDesc.RefreshRate.Denominator = 60;
SwapChainDesc.BufferDesc.Format                  = DXGI_FORMAT_R8G8B8A8_UNORM;
SwapChainDesc.BufferDesc.ScanlineOrdering        = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
SwapChainDesc.BufferDesc.Scaling                 = DXGI_MODE_SCALING_UNSPECIFIED;
SwapChainDesc.SampleDesc.Count                   = 4;
SwapChainDesc.SampleDesc.Quality                 = 0;
SwapChainDesc.BufferUsage                        = DXGI_USAGE_RENDER_TARGET_OUTPUT;
SwapChainDesc.BufferCount                        = 1;
SwapChainDesc.OutputWindow                       = WindowHandle;
SwapChainDesc.Windowed                           = true;
SwapChainDesc.SwapEffect                         = DXGI_SWAP_EFFECT_DISCARD;
SwapChainDesc.Flags                              = 0;

And I don't do anything special with the Present call, I have VSync enabled so it's really just this:

SwapChain->Present(1, 0);

Does any of this seem out of the ordinary to you? (I tried using different SwapEffects too like SEQUENTIAL, but to no avail. Also setting the SwapEffect to either FLIP_DISCARD or FLIP_SEQUENTIAL makes the D3D11CreateDeviceAndSwapChain call fail).

This has nothing to do with swapchain tearing. You wouldn't be able to record swapchain tearing in a video unless you physically recorded your screen.

That's a good point, although besides this there's nothing I do w.r.t. vsync, multisampling, or other effects that would affect the entire frame buffer.

Your video hoster likes to display a VPN ad. Not nice.

My guess is also on a mismatching resolution, client size vs. swap chain size.

vinterberg said:

Wondering if what you're seeing is a result of viewport scaling?
Maybe your viewport is scaled by a few pixels because of wrongly-calculated window size?

Edit: a resolution of 1280x696 seems "off"..?

This was indeed the case, and after adjusting the size the artifact is gone! Thank you!!
More specifically, I thought I would get the proper size for my window by doing this:

RECT WindowRect = {0};
WindowRect.right  = 1280;
WindowRect.bottom = 720;
AdjustWindowRect(&WindowRect, WS_OVERLAPPEDWINDOW | WS_VISIBLE, false);    
HWND WindowHandle = CreateWindow(WindowClass.lpszClassName,
                                 "Game Window",
                                 WS_OVERLAPPEDWINDOW | WS_VISIBLE,
                                 CW_USEDEFAULT,
                                 CW_USEDEFAULT,
                                 WindowRect.right,
                                 WindowRect.bottom,
                                 nullptr,
                                 nullptr,
                                 Instance,
                                 nullptr);

But as it turns out, after calling the AdjustWindowRect function, the WindowRect's left and top are no longer 0, so the width and height that I should pass to the CreateWindow function should be WindowRect.right-WindowRect.left and WindowRect.bottom-WindowRect.top respectively.

Endurion said:

Your video hoster likes to display a VPN ad. Not nice.

My guess is also on a mismatching resolution, client size vs. swap chain size.

My apologies, I noticed this but didn't really care that much as I just wanted to get my video up and running. This was the first hit I found on google that hosts for free. Is there any particular host you'd recommend I use in the future?