Method Shutdown

ImGUI GLFW Tutorial/imgui/imgui.cpp:4157–4234

This function is merely here to free heap allocations.

// This function is merely here to free heap allocations.
void ImGui::Shutdown(ImGuiContext* context)
{
    // The fonts atlas can be used prior to calling NewFrame(), so we clear it even if g.Initialized is FALSE (which would happen if we never called NewFrame)
    ImGuiContext& g = *context;
    if (g.IO.Fonts && g.FontAtlasOwnedByContext)
    {
        g.IO.Fonts->Locked = false;
        IM_DELETE(g.IO.Fonts);
    }
    g.IO.Fonts = NULL;

    // Cleanup of other data are conditional on actually having initialized Dear ImGui.
    if (!g.Initialized)
        return;

    // Save settings (unless we haven't attempted to load them: CreateContext/DestroyContext without a call to NewFrame shouldn't save an empty file)
    if (g.SettingsLoaded && g.IO.IniFilename != NULL)
    {
        ImGuiContext* backup_context = GImGui;
        SetCurrentContext(&g);
        SaveIniSettingsToDisk(g.IO.IniFilename);
        SetCurrentContext(backup_context);
    }

    CallContextHooks(&g, ImGuiContextHookType_Shutdown);

    // Clear everything else
    for (int i = 0; i < g.Windows.Size; i++)
        IM_DELETE(g.Windows[i]);
    g.Windows.clear();
    g.WindowsFocusOrder.clear();
    g.WindowsTempSortBuffer.clear();
    g.CurrentWindow = NULL;
    g.CurrentWindowStack.clear();
    g.WindowsById.Clear();
    g.NavWindow = NULL;
    g.HoveredWindow = g.HoveredWindowUnderMovingWindow = NULL;
    g.ActiveIdWindow = g.ActiveIdPreviousFrameWindow = NULL;
    g.MovingWindow = NULL;
    g.ColorStack.clear();
    g.StyleVarStack.clear();
    g.FontStack.clear();
    g.OpenPopupStack.clear();
    g.BeginPopupStack.clear();

    for (int i = 0; i < g.Viewports.Size; i++)
        IM_DELETE(g.Viewports[i]);
    g.Viewports.clear();

    g.TabBars.Clear();
    g.CurrentTabBarStack.clear();
    g.ShrinkWidthBuffer.clear();

    g.Tables.Clear();
    for (int i = 0; i < g.TablesTempDataStack.Size; i++)
        g.TablesTempDataStack[i].~ImGuiTableTempData();
    g.TablesTempDataStack.clear();
    g.DrawChannelsTempMergeBuffer.clear();