Child window position changes depending on the viewport coordinate sign

[Vucee]

Version/Branch of Dear ImGui:
v1.89.3 docking

Back-end/Renderer/Compiler/OS
Back-ends: imgui_impl_dx11.cpp + imgui_impl_win32.cpp
Operating System: Windows 10

My Issue/Question:
The position of a child window is different on each monitor.
Depedning on which monitor I drag the UI, the result differs. Is there anything I'm doing wrong?

Main Monitor:

Top Monitor:

Left Monitor:

My code for drawing the UI:

ImGui::SetNextWindowBgAlpha(1.0f);
ImGui::PushStyleVar(ImGuiStyleVar_WindowBorderSize, { 0.0f });
ImGui::PushStyleColor(ImGuiCol_Border, ImVec4{ 0.161f, 0.157f, 0.173f, 1.0f });
ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4{ 1,1,1, 1.0f });
//ImGui::GetStyle().Alpha = 1.0f;		
ImGui::SetNextWindowSize({1000,750});
ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0, 0));
ImGui::Begin(lpWindowName, &bDraw, WindowFlags);
{	
	ImVec2 pos = ImGui::GetWindowPos();
	//ImDrawList* draw = ImGui::GetWindowDrawList();
	
	ImGui::PushStyleVar(ImGuiStyleVar_ChildBorderSize, 0.0f );
	ImGui::PushStyleColor(ImGuiCol_Border, ImVec4{ 1.0f, 1.0f ,0.0f , 1.0f });
	ImGui::PushStyleColor(ImGuiCol_ChildBg, ImVec4{ 0.0f, 0.0f, 0.0f, 1.0f });
	ImGui::SetNextWindowPos(pos);
	ImGui::BeginChild("main", {800, 550});
	{

	}
        ImGui::EndChild();
}
ImGui::End();

[ocornut]

What are the monitor coordinates?
You can see them in Tools->Metrics->Viewports

May be caused by rounding, this issue #2176

[Vucee]

Main Monitor:

Top Monitor:

Left Monitor:

[ocornut]

Sorry I have linked #2176 but that goes talking about a different issue.
The actual issue with negative coordinates is #2884. There is a likely trivial fix which is to use ImFloorSigned() instead of ImFloor(), or completely replace the later with the earlier. Doing the 100% fix I worry would need too-careful measurement, but I presume we could do the half fix first which would be to use ImFloorSigned() in a few selected places pertaining to window position, and that would not have measurable impact.

[Vucee]

thanks! ImFloorSigned() worked for me.

It isn't really a big deal anyway. I just wasn't sure if that is a bug or not.