imgui/examples/opengl3_example/imgui_impl_glfw_gl3.h

// ImGui GLFW binding with OpenGL3 + shaders
// https://github.com/ocornut/imgui

struct GLFWwindow;

bool        ImGui_ImplGlfwGL3_Init(GLFWwindow* window, bool install_callbacks);
void        ImGui_ImplGlfwGL3_Shutdown();
void        ImGui_ImplGlfwGL3_NewFrame();

// Use if you want to reset your rendering device without losing ImGui state.
void        ImGui_ImplGlfwGL3_InvalidateDeviceObjects();
bool        ImGui_ImplGlfwGL3_CreateDeviceObjects();

// GLFW callbacks (installed by default if you enable 'install_callbacks' during initialization)
// Provided here if you want to chain callbacks.
// You can also handle inputs yourself and use those as a reference.
void        ImGui_ImplGlfwGL3_MouseButtonCallback(GLFWwindow* window, int button, int action, int mods);
void        ImGui_ImplGlfwGL3_ScrollCallback(GLFWwindow* window, double xoffset, double yoffset);
void        ImGui_ImplGlFwGL3_KeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods);
void        ImGui_ImplGlfwGL3_CharCallback(GLFWwindow* window, unsigned int c);