Function SetWindowViewport

engine/3rdparty/imgui/imgui.cpp:12445–12454

}

static void SetWindowViewport(ImGuiWindow* window, ImGuiViewportP* viewport)
{
    // Abandon viewport
    if (window->ViewportOwned && window->Viewport->Window == window)
        window->Viewport->Size = ImVec2(0.0f, 0.0f);

    window->Viewport = viewport;
    window->ViewportId = viewport->ID;
    window->ViewportOwned = (viewport->Window == window);
}

static bool ImGui::GetWindowAlwaysWantOwnViewport(ImGuiWindow* window)
{