odd line artefacts on my screen? (C++ DirectX11)

Question

I'm getting some odd lines on my screen in my program:

They seem to be in a static location on the screen and occur at regular intervals. They are also on the horizontal too but are harder to see in the image.

So far I have tried:

turning anti-aliasing off, turning multi-sampling off, rendering my images at full size (no scaling) and using texture sizes of a power of 2.

And none of that seems to work. Right now I am working on adding fonts in, but this issue means that lines of the fonts can disappear (the bottom of an 'o' the middle of a 'B' (so it looks like a 'D'), etc).

Answer 1

A frequent cause of this is running in windowed mode, and making the back buffer a different size to the client area. D3D will automatically stretch the back buffer to fill the client area, but it doesn't do it with a good quality filter.

This is easily fixed either by using AdjustWindowRectEx() when creating the window, or by calling GetClientRect() to get the client area size when creating the back buffer.