VK_LAYER_LUNARG_monitor is incompatible with multiple viewport

[alanjian85]

Version/Branch of Dear ImGui:

Version: 1.88 WIP
Branch: docking

Back-end/Renderer/Compiler/OS

Back-ends: imgui_impl_glfw.cpp + imgui_impl_vulkan.cpp
Compiler: MSVC v143
Operating System: Windows 11 Pro Build 22000.739

My Issue/Question:

ImGui creates a new viewport window every time I move a widget out of the main window, but this action would cause the framerate counter on the title bar created by the layer VK_LAYER_LUNARG_monitor enabled during the instance creation stage stop working, this subtle bug makes it hard to profile my program and freeze the title in a strange text.

Screenshots/Video

2022-06-18.21-01-36_Trim.mp4

[PathogenDavid]

This is almost certainly this bug in VK_LAYER_LUNARG_monitor: LunarG/VulkanTools#1590

(If you disable ImGuiIO::ConfigViewportsNoDecoration you will probably find that the monitor has switched to the title of the secondary viewport.)

You're probably better off drawing your own FPS counter.

[ocornut]

I would indeed suggest to further diagnose the bug and submit an issue on LunarG or add to LunarG/VulkanTools#1590