IMGUI_APIImDrawData*GetDrawData();// same value as passed to your RenderDrawListsFn() function. valid after Render() and until the next call to NewFrame()
IMGUI_APIImDrawData*GetDrawData();// same value as passed to your io.RenderDrawListsFn() function. valid after Render() and until the next call to NewFrame().
IMGUI_APIvoidNewFrame();
IMGUI_APIvoidRender();
IMGUI_APIvoidRender();// finalize rendering data, then call your io.RenderDrawListsFn() function if set.