Method EndFrame

src/third-party/imgui/imgui.cpp:4767–4845

This is normally called by Render(). You may want to call it directly if you want to avoid calling Render() but the gain will be very minimal.

// This is normally called by Render(). You may want to call it directly if you want to avoid calling Render() but the gain will be very minimal.
void ImGui::EndFrame()
{
    ImGuiContext& g = *GImGui;
    IM_ASSERT(g.Initialized);

    // Don't process EndFrame() multiple times.
    if (g.FrameCountEnded == g.FrameCount)
        return;
    IM_ASSERT(g.WithinFrameScope && "Forgot to call ImGui::NewFrame()?");

    CallContextHooks(&g, ImGuiContextHookType_EndFramePre);

    ErrorCheckEndFrameSanityChecks();

    // Notify Platform/OS when our Input Method Editor cursor has moved (e.g. CJK inputs using Microsoft IME)
    if (g.IO.SetPlatformImeDataFn && memcmp(&g.PlatformImeData, &g.PlatformImeDataPrev, sizeof(ImGuiPlatformImeData)) != 0)
        g.IO.SetPlatformImeDataFn(GetMainViewport(), &g.PlatformImeData);

    // Hide implicit/fallback "Debug" window if it hasn't been used
    g.WithinFrameScopeWithImplicitWindow = false;
    if (g.CurrentWindow && !g.CurrentWindow->WriteAccessed)
        g.CurrentWindow->Active = false;
    End();

    // Update navigation: CTRL+Tab, wrap-around requests
    NavEndFrame();

    // Drag and Drop: Elapse payload (if delivered, or if source stops being submitted)
    if (g.DragDropActive)
    {
        bool is_delivered = g.DragDropPayload.Delivery;
        bool is_elapsed = (g.DragDropPayload.DataFrameCount + 1 < g.FrameCount) && ((g.DragDropSourceFlags & ImGuiDragDropFlags_SourceAutoExpirePayload) || !IsMouseDown(g.DragDropMouseButton));
        if (is_delivered || is_elapsed)
            ClearDragDrop();
    }

    // Drag and Drop: Fallback for source tooltip. This is not ideal but better than nothing.
    if (g.DragDropActive && g.DragDropSourceFrameCount < g.FrameCount && !(g.DragDropSourceFlags & ImGuiDragDropFlags_SourceNoPreviewTooltip))
    {
        g.DragDropWithinSource = true;
        SetTooltip("...");
        g.DragDropWithinSource = false;
    }

    // End frame
    g.WithinFrameScope = false;
    g.FrameCountEnded = g.FrameCount;

    // Initiate moving window + handle left-click and right-click focus
    UpdateMouseMovingWindowEndFrame();

    // Sort the window list so that all child windows are after their parent
    // We cannot do that on FocusWindow() because children may not exist yet
    g.WindowsTempSortBuffer.resize(0);
    g.WindowsTempSortBuffer.reserve(g.Windows.Size);
    for (int i = 0; i != g.Windows.Size; i++)
    {
        ImGuiWindow* window = g.Windows[i];