Resize of DX12 Example Causes Problems

[PaltryProgrammer]

greetings kind regards please see attached GIF demonstrate subsequent to resize of example selection of GUI elements via mouse pointer becomes incorrect . thank you kindly

[Zelif]

Oddly enough I was getting a similar issue last week with glfw + webGPU trying to track it down was maddening(2 days lost trying to fix it), ended up rebooting and it went away. I've tried running the example and resizing and seems to not be showing this issue. I noticed the viewport fixes itself up if you move it via the title bar, but still would break if resized.

[ocornut]

I cannot repro here.

• Are you on Master or Docking branch?

• You confirm this happens on unmodified DX12 examples ?

• What's the "Target Platform Version" and "Platform Toolset" used ? (visible in Project Properties>General?)

• Can you open "Metrics->Viewports" and capture with Size showing so we can see what value of io.DisplaySize is seen by Dear ImGui, and if it matches the visible client area?

• I'd suggest updating drivers.

[shmadchenko]

Hello. I apologize in advance, I am not a native speaker, I used Google for translation.

I thought that my observations might be useful in some way. I observed the behavior described above with unmodified examples with vulcan and dx12 backends. The problem was not reproduced with other backends (olg2, ogl3, dx9, dx10, dx11). I checked only with glfw and win32.

The offset disappears after I move the window and appears again when I resize the window again.

At the same time, I did not observe any difference in renderdoc captures before and after resizing the window. Values in "Dead ImGui Metrics/Debugger" window are looks good too.

It seems that this is a problem not on the imgui side, but on the operating system or driver side. I noticed that other dx12 applications behave a little strangely. A black screen was displayed for a while when switching to them in fullscreen mode. I remembered that I had not rebooted my pc for more than a week, while I was experimenting a lot with the vulkan and catching many errors. Perhaps something is stuck on the driver side. After rebooting the system, the problem disappeared and is no longer reproducible.