Method NewFrame

KBotExt/imgui/imgui.cpp:4500–4771

}

void ImGui::NewFrame()
{
	IM_ASSERT(GImGui != NULL && "No current context. Did you call ImGui::CreateContext() and ImGui::SetCurrentContext() ?");
	ImGuiContext& g = *GImGui;

	// Remove pending delete hooks before frame start.
	// This deferred removal avoid issues of removal while iterating the hook vector
	for (int n = g.Hooks.Size - 1; n >= 0; n--)
		if (g.Hooks[n].Type == ImGuiContextHookType_PendingRemoval_)
			g.Hooks.erase(&g.Hooks[n]);

	CallContextHooks(&g, ImGuiContextHookType_NewFramePre);

	// Check and assert for various common IO and Configuration mistakes
	ErrorCheckNewFrameSanityChecks();

	// Load settings on first frame, save settings when modified (after a delay)
	UpdateSettings();

	g.Time += g.IO.DeltaTime;
	g.WithinFrameScope = true;
	g.FrameCount += 1;
	g.TooltipOverrideCount = 0;
	g.WindowsActiveCount = 0;
	g.MenusIdSubmittedThisFrame.resize(0);

	// Calculate frame-rate for the user, as a purely luxurious feature
	g.FramerateSecPerFrameAccum += g.IO.DeltaTime - g.FramerateSecPerFrame[g.FramerateSecPerFrameIdx];
	g.FramerateSecPerFrame[g.FramerateSecPerFrameIdx] = g.IO.DeltaTime;
	g.FramerateSecPerFrameIdx = (g.FramerateSecPerFrameIdx + 1) % IM_ARRAYSIZE(g.FramerateSecPerFrame);
	g.FramerateSecPerFrameCount = ImMin(g.FramerateSecPerFrameCount + 1, IM_ARRAYSIZE(g.FramerateSecPerFrame));
	g.IO.Framerate = (g.FramerateSecPerFrameAccum > 0.0f) ? (1.0f / (g.FramerateSecPerFrameAccum / (float)g.FramerateSecPerFrameCount)) : FLT_MAX;

	// Process input queue (trickle as many events as possible), turn events into writes to IO structure
	g.InputEventsTrail.resize(0);
	UpdateInputEvents(g.IO.ConfigInputTrickleEventQueue);

	// Update viewports (after processing input queue, so io.MouseHoveredViewport is set)
	UpdateViewportsNewFrame();

	// Setup current font and draw list shared data
	g.IO.Fonts->Locked = true;
	SetCurrentFont(GetDefaultFont());
	IM_ASSERT(g.Font->IsLoaded());
	ImRect virtual_space(FLT_MAX, FLT_MAX, -FLT_MAX, -FLT_MAX);
	for (ImGuiViewportP* viewport : g.Viewports)
		virtual_space.Add(viewport->GetMainRect());
	g.DrawListSharedData.ClipRectFullscreen = virtual_space.ToVec4();
	g.DrawListSharedData.CurveTessellationTol = g.Style.CurveTessellationTol;
	g.DrawListSharedData.SetCircleTessellationMaxError(g.Style.CircleTessellationMaxError);
	g.DrawListSharedData.InitialFlags = ImDrawListFlags_None;
	if (g.Style.AntiAliasedLines)
		g.DrawListSharedData.InitialFlags |= ImDrawListFlags_AntiAliasedLines;
	if (g.Style.AntiAliasedLinesUseTex && !(g.Font->ContainerAtlas->Flags & ImFontAtlasFlags_NoBakedLines))
		g.DrawListSharedData.InitialFlags |= ImDrawListFlags_AntiAliasedLinesUseTex;
	if (g.Style.AntiAliasedFill)
		g.DrawListSharedData.InitialFlags |= ImDrawListFlags_AntiAliasedFill;
	if (g.IO.BackendFlags & ImGuiBackendFlags_RendererHasVtxOffset)