Obsoleted the io.RenderDrawListsFn callback, you can call your graphics engine render function after ImGui::Render(). Use ImGui::GetDrawData() to retrieve the ImDrawData* to display..(#1599)

Examples: Updated examples.

examples/allegro5_example/main.cpp

@@ -114,6 +114,7 @@ int main(int, char**)
         // Rendering
         al_clear_to_color(al_map_rgba_f(clear_color.x, clear_color.y, clear_color.z, clear_color.w));
         ImGui::Render();
+        ImGui_ImplA5_RenderDrawData(ImGui::GetDrawData());
         al_flip_display();
     }