Typedefs
typedef struct GLFWwindow	GLFWwindow
	Opaque window object. More...

typedef void(*	GLFWwindowposfun) (GLFWwindow *, int, int)
	The function signature for window position callbacks. More...

typedef void(*	GLFWwindowsizefun) (GLFWwindow *, int, int)
	The function signature for window resize callbacks. More...

typedef void(*	GLFWwindowclosefun) (GLFWwindow *)
	The function signature for window close callbacks. More...

typedef void(*	GLFWwindowrefreshfun) (GLFWwindow *)
	The function signature for window content refresh callbacks. More...

typedef void(*	GLFWwindowfocusfun) (GLFWwindow *, int)
	The function signature for window focus/defocus callbacks. More...

typedef void(*	GLFWwindowiconifyfun) (GLFWwindow *, int)
	The function signature for window iconify/restore callbacks. More...

typedef void(*	GLFWframebuffersizefun) (GLFWwindow *, int, int)
	The function signature for framebuffer resize callbacks. More...

Functions
void	glfwDefaultWindowHints (void)
	Resets all window hints to their default values. More...

void	glfwWindowHint (int target, int hint)
	Sets the specified window hint to the desired value. More...

GLFWwindow *	glfwCreateWindow (int width, int height, const char title, GLFWmonitor monitor, GLFWwindow *share)
	Creates a window and its associated context. More...

void	glfwDestroyWindow (GLFWwindow *window)
	Destroys the specified window and its context. More...

int	glfwWindowShouldClose (GLFWwindow *window)
	Checks the close flag of the specified window. More...

void	glfwSetWindowShouldClose (GLFWwindow *window, int value)
	Sets the close flag of the specified window. More...

void	glfwSetWindowTitle (GLFWwindow window, const char title)
	Sets the title of the specified window. More...

void	glfwGetWindowPos (GLFWwindow window, int xpos, int *ypos)
	Retrieves the position of the client area of the specified window. More...

void	glfwSetWindowPos (GLFWwindow *window, int xpos, int ypos)
	Sets the position of the client area of the specified window. More...

void	glfwGetWindowSize (GLFWwindow window, int width, int *height)
	Retrieves the size of the client area of the specified window. More...

void	glfwSetWindowSize (GLFWwindow *window, int width, int height)
	Sets the size of the client area of the specified window. More...

void	glfwGetFramebufferSize (GLFWwindow window, int width, int *height)
	Retrieves the size of the framebuffer of the specified window. More...

void	glfwIconifyWindow (GLFWwindow *window)
	Iconifies the specified window. More...

void	glfwRestoreWindow (GLFWwindow *window)
	Restores the specified window. More...

void	glfwShowWindow (GLFWwindow *window)
	Makes the specified window visible. More...

void	glfwHideWindow (GLFWwindow *window)
	Hides the specified window. More...

GLFWmonitor *	glfwGetWindowMonitor (GLFWwindow *window)
	Returns the monitor that the window uses for full screen mode. More...

int	glfwGetWindowAttrib (GLFWwindow *window, int attrib)
	Returns an attribute of the specified window. More...

void	glfwSetWindowUserPointer (GLFWwindow window, void pointer)
	Sets the user pointer of the specified window. More...

void *	glfwGetWindowUserPointer (GLFWwindow *window)
	Returns the user pointer of the specified window. More...

GLFWwindowposfun	glfwSetWindowPosCallback (GLFWwindow *window, GLFWwindowposfun cbfun)
	Sets the position callback for the specified window. More...

GLFWwindowsizefun	glfwSetWindowSizeCallback (GLFWwindow *window, GLFWwindowsizefun cbfun)
	Sets the size callback for the specified window. More...

GLFWwindowclosefun	glfwSetWindowCloseCallback (GLFWwindow *window, GLFWwindowclosefun cbfun)
	Sets the close callback for the specified window. More...

GLFWwindowrefreshfun	glfwSetWindowRefreshCallback (GLFWwindow *window, GLFWwindowrefreshfun cbfun)
	Sets the refresh callback for the specified window. More...

GLFWwindowfocusfun	glfwSetWindowFocusCallback (GLFWwindow *window, GLFWwindowfocusfun cbfun)
	Sets the focus callback for the specified window. More...

GLFWwindowiconifyfun	glfwSetWindowIconifyCallback (GLFWwindow *window, GLFWwindowiconifyfun cbfun)
	Sets the iconify callback for the specified window. More...

GLFWframebuffersizefun	glfwSetFramebufferSizeCallback (GLFWwindow *window, GLFWframebuffersizefun cbfun)
	Sets the framebuffer resize callback for the specified window. More...

void	glfwPollEvents (void)
	Processes all pending events. More...

void	glfwWaitEvents (void)
	Waits until events are pending and processes them. More...

Detailed Description

This is the reference documentation for window related functions and types, including creation, deletion and event polling. For more information, see the Window handling guide.

Typedef Documentation

◆ GLFWframebuffersizefun

typedef void(* GLFWframebuffersizefun) (GLFWwindow *, int, int)

This is the function signature for framebuffer resize callback functions.

Parameters

[in]	window	The window whose framebuffer was resized.
[in]	width	The new width, in pixels, of the framebuffer.
[in]	height	The new height, in pixels, of the framebuffer.

See also: glfwSetFramebufferSizeCallback

◆ GLFWwindow

typedef struct GLFWwindow GLFWwindow

Opaque window object.

◆ GLFWwindowclosefun

typedef void(* GLFWwindowclosefun) (GLFWwindow *)

This is the function signature for window close callback functions.

Parameters

[in] window The window that the user attempted to close.

See also: glfwSetWindowCloseCallback

◆ GLFWwindowfocusfun

typedef void(* GLFWwindowfocusfun) (GLFWwindow *, int)

This is the function signature for window focus callback functions.

Parameters

[in]	window	The window that was focused or defocused.
[in]	focused	`GL_TRUE` if the window was focused, or `GL_FALSE` if it was defocused.

See also: glfwSetWindowFocusCallback

◆ GLFWwindowiconifyfun

typedef void(* GLFWwindowiconifyfun) (GLFWwindow *, int)

This is the function signature for window iconify/restore callback functions.

Parameters

[in]	window	The window that was iconified or restored.
[in]	iconified	`GL_TRUE` if the window was iconified, or `GL_FALSE` if it was restored.

See also: glfwSetWindowIconifyCallback

◆ GLFWwindowposfun

typedef void(* GLFWwindowposfun) (GLFWwindow *, int, int)

This is the function signature for window position callback functions.

Parameters

[in]	window	The window that the user moved.
[in]	xpos	The new x-coordinate, in screen coordinates, of the upper-left corner of the client area of the window.
[in]	ypos	The new y-coordinate, in screen coordinates, of the upper-left corner of the client area of the window.

See also: glfwSetWindowPosCallback

◆ GLFWwindowrefreshfun

typedef void(* GLFWwindowrefreshfun) (GLFWwindow *)

This is the function signature for window refresh callback functions.

Parameters

[in] window The window whose content needs to be refreshed.

See also: glfwSetWindowRefreshCallback

◆ GLFWwindowsizefun

typedef void(* GLFWwindowsizefun) (GLFWwindow *, int, int)

This is the function signature for window size callback functions.

Parameters

[in]	window	The window that the user resized.
[in]	width	The new width, in screen coordinates, of the window.
[in]	height	The new height, in screen coordinates, of the window.

See also: glfwSetWindowSizeCallback

Function Documentation

◆ glfwCreateWindow()

GLFWwindow* glfwCreateWindow	(	int	width,
		int	height,
		const char *	title,
		GLFWmonitor *	monitor,
		GLFWwindow *	share
	)

This function creates a window and its associated context. Most of the options controlling how the window and its context should be created are specified through glfwWindowHint.

Successful creation does not change which context is current. Before you can use the newly created context, you need to make it current using glfwMakeContextCurrent.

Note that the created window and context may differ from what you requested, as not all parameters and hints are hard constraints. This includes the size of the window, especially for full screen windows. To retrieve the actual attributes of the created window and context, use queries like glfwGetWindowAttrib and glfwGetWindowSize.

To create a full screen window, you need to specify the monitor to use. If no monitor is specified, windowed mode will be used. Unless you have a way for the user to choose a specific monitor, it is recommended that you pick the primary monitor. For more information on how to retrieve monitors, see Retrieving monitors.

To create the window at a specific position, make it initially invisible using the GLFW_VISIBLE window hint, set its position and then show it.

If a full screen window is active, the screensaver is prohibited from starting.

Parameters

[in]	width	The desired width, in screen coordinates, of the window. This must be greater than zero.
[in]	height	The desired height, in screen coordinates, of the window. This must be greater than zero.
[in]	title	The initial, UTF-8 encoded window title.
[in]	monitor	The monitor to use for full screen mode, or `NULL` to use windowed mode.
[in]	share	The window whose context to share resources with, or `NULL` to not share resources.

Returns: The handle of the created window, or NULL if an error occurred.

Remarks: Windows: Window creation will fail if the Microsoft GDI software OpenGL implementation is the only one available.; Windows: If the executable has an icon resource named GLFW_ICON, it will be set as the icon for the window. If no such icon is present, the IDI_WINLOGO icon will be used instead.; OS X: The GLFW window has no icon, as it is not a document window, but the dock icon will be the same as the application bundle's icon. Also, the first time a window is opened the menu bar is populated with common commands like Hide, Quit and About. The (minimal) about dialog uses information from the application's bundle. For more information on bundles, see the Bundle Programming Guide provided by Apple.; X11: There is no mechanism for setting the window icon yet.; The swap interval is not set during window creation, but is left at the default value for that platform. For more information, see glfwSwapInterval.

Note: This function may only be called from the main thread.

See also: glfwDestroyWindow

◆ glfwDefaultWindowHints()

void glfwDefaultWindowHints ( void )

This function resets all window hints to their default values.

Note: This function may only be called from the main thread.

See also: glfwWindowHint

◆ glfwDestroyWindow()

void glfwDestroyWindow ( GLFWwindow * window )

This function destroys the specified window and its context. On calling this function, no further callbacks will be called for that window.

Parameters

[in] window The window to destroy.

Note: This function may only be called from the main thread.; This function may not be called from a callback.; If the window's context is current on the main thread, it is detached before being destroyed.

Warning: The window's context must not be current on any other thread.

See also: glfwCreateWindow

◆ glfwGetFramebufferSize()

void glfwGetFramebufferSize	(	GLFWwindow *	window,
		int *	width,
		int *	height
	)

This function retrieves the size, in pixels, of the framebuffer of the specified window. If you wish to retrieve the size of the window in screen coordinates, see glfwGetWindowSize.

Parameters

[in]	window	The window whose framebuffer to query.
[out]	width	Where to store the width, in pixels, of the framebuffer, or `NULL`.
[out]	height	Where to store the height, in pixels, of the framebuffer, or `NULL`.

See also: glfwSetFramebufferSizeCallback

◆ glfwGetWindowAttrib()

int glfwGetWindowAttrib	(	GLFWwindow *	window,
		int	attrib
	)

This function returns an attribute of the specified window. There are many attributes, some related to the window and others to its context.

Parameters

[in]	window	The window to query.
[in]	attrib	The window attribute whose value to return.

Returns: The value of the attribute, or zero if an error occurred.

◆ glfwGetWindowMonitor()

GLFWmonitor* glfwGetWindowMonitor ( GLFWwindow * window )

This function returns the handle of the monitor that the specified window is in full screen on.

Parameters

[in] window The window to query.

Returns: The monitor, or NULL if the window is in windowed mode.

◆ glfwGetWindowPos()

void glfwGetWindowPos	(	GLFWwindow *	window,
		int *	xpos,
		int *	ypos
	)

This function retrieves the position, in screen coordinates, of the upper-left corner of the client area of the specified window.

Parameters

[in]	window	The window to query.
[out]	xpos	Where to store the x-coordinate of the upper-left corner of the client area, or `NULL`.
[out]	ypos	Where to store the y-coordinate of the upper-left corner of the client area, or `NULL`.

See also: glfwSetWindowPos

◆ glfwGetWindowSize()

void glfwGetWindowSize	(	GLFWwindow *	window,
		int *	width,
		int *	height
	)

This function retrieves the size, in screen coordinates, of the client area of the specified window. If you wish to retrieve the size of the framebuffer in pixels, see glfwGetFramebufferSize.

Parameters

[in]	window	The window whose size to retrieve.
[out]	width	Where to store the width, in screen coordinates, of the client area, or `NULL`.
[out]	height	Where to store the height, in screen coordinates, of the client area, or `NULL`.

See also: glfwSetWindowSize

◆ glfwGetWindowUserPointer()

void* glfwGetWindowUserPointer ( GLFWwindow * window )

This function returns the current value of the user-defined pointer of the specified window. The initial value is NULL.

Parameters

[in] window The window whose pointer to return.

See also: glfwSetWindowUserPointer

◆ glfwHideWindow()

void glfwHideWindow ( GLFWwindow * window )

This function hides the specified window, if it was previously visible. If the window is already hidden or is in full screen mode, this function does nothing.

Parameters

[in] window The window to hide.

Note: This function may only be called from the main thread.

See also: glfwShowWindow

◆ glfwIconifyWindow()

void glfwIconifyWindow ( GLFWwindow * window )

This function iconifies/minimizes the specified window, if it was previously restored. If it is a full screen window, the original monitor resolution is restored until the window is restored. If the window is already iconified, this function does nothing.

Parameters

[in] window The window to iconify.

Note: This function may only be called from the main thread.

See also: glfwRestoreWindow

◆ glfwPollEvents()

void glfwPollEvents ( void )

This function processes only those events that have already been received and then returns immediately. Processing events will cause the window and input callbacks associated with those events to be called.

This function is not required for joystick input to work.

New in GLFW 3: This function is no longer called by glfwSwapBuffers. You need to call it or glfwWaitEvents yourself.

Remarks: On some platforms, a window move, resize or menu operation will cause event processing to block. This is due to how event processing is designed on those platforms. You can use the window refresh callback to redraw the contents of your window when necessary during the operation.

Note: This function may only be called from the main thread.; This function may not be called from a callback.; On some platforms, certain callbacks may be called outside of a call to one of the event processing functions.

See also: glfwWaitEvents

◆ glfwRestoreWindow()

void glfwRestoreWindow ( GLFWwindow * window )

This function restores the specified window, if it was previously iconified/minimized. If it is a full screen window, the resolution chosen for the window is restored on the selected monitor. If the window is already restored, this function does nothing.

Parameters

[in] window The window to restore.

Note: This function may only be called from the main thread.

See also: glfwIconifyWindow

◆ glfwSetFramebufferSizeCallback()

GLFWframebuffersizefun glfwSetFramebufferSizeCallback	(	GLFWwindow *	window,
		GLFWframebuffersizefun	cbfun
	)

This function sets the framebuffer resize callback of the specified window, which is called when the framebuffer of the specified window is resized.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or an error occurred.

◆ glfwSetWindowCloseCallback()

GLFWwindowclosefun glfwSetWindowCloseCallback	(	GLFWwindow *	window,
		GLFWwindowclosefun	cbfun
	)

This function sets the close callback of the specified window, which is called when the user attempts to close the window, for example by clicking the close widget in the title bar.

The close flag is set before this callback is called, but you can modify it at any time with glfwSetWindowShouldClose.

The close callback is not triggered by glfwDestroyWindow.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or an error occurred.

New in GLFW 3: The close callback no longer returns a value.

Remarks: OS X: Selecting Quit from the application menu will trigger the close callback for all windows.

◆ glfwSetWindowFocusCallback()

GLFWwindowfocusfun glfwSetWindowFocusCallback	(	GLFWwindow *	window,
		GLFWwindowfocusfun	cbfun
	)

This function sets the focus callback of the specified window, which is called when the window gains or loses focus.

After the focus callback is called for a window that lost focus, synthetic key and mouse button release events will be generated for all such that had been pressed. For more information, see glfwSetKeyCallback and glfwSetMouseButtonCallback.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or an error occurred.

◆ glfwSetWindowIconifyCallback()

GLFWwindowiconifyfun glfwSetWindowIconifyCallback	(	GLFWwindow *	window,
		GLFWwindowiconifyfun	cbfun
	)

This function sets the iconification callback of the specified window, which is called when the window is iconified or restored.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or an error occurred.

◆ glfwSetWindowPos()

void glfwSetWindowPos	(	GLFWwindow *	window,
		int	xpos,
		int	ypos
	)

This function sets the position, in screen coordinates, of the upper-left corner of the client area of the window.

If the specified window is a full screen window, this function does nothing.

If you wish to set an initial window position you should create a hidden window (using glfwWindowHint and GLFW_VISIBLE), set its position and then show it.

Parameters

[in]	window	The window to query.
[in]	xpos	The x-coordinate of the upper-left corner of the client area.
[in]	ypos	The y-coordinate of the upper-left corner of the client area.

Note: It is very rarely a good idea to move an already visible window, as it will confuse and annoy the user.; This function may only be called from the main thread.; The window manager may put limits on what positions are allowed.

See also: glfwGetWindowPos

◆ glfwSetWindowPosCallback()

GLFWwindowposfun glfwSetWindowPosCallback	(	GLFWwindow *	window,
		GLFWwindowposfun	cbfun
	)

This function sets the position callback of the specified window, which is called when the window is moved. The callback is provided with the screen position of the upper-left corner of the client area of the window.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or an error occurred.

◆ glfwSetWindowRefreshCallback()

GLFWwindowrefreshfun glfwSetWindowRefreshCallback	(	GLFWwindow *	window,
		GLFWwindowrefreshfun	cbfun
	)

This function sets the refresh callback of the specified window, which is called when the client area of the window needs to be redrawn, for example if the window has been exposed after having been covered by another window.

On compositing window systems such as Aero, Compiz or Aqua, where the window contents are saved off-screen, this callback may be called only very infrequently or never at all.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or an error occurred.

Note: On compositing window systems such as Aero, Compiz or Aqua, where the window contents are saved off-screen, this callback may be called only very infrequently or never at all.

◆ glfwSetWindowShouldClose()

void glfwSetWindowShouldClose	(	GLFWwindow *	window,
		int	value
	)

This function sets the value of the close flag of the specified window. This can be used to override the user's attempt to close the window, or to signal that it should be closed.

Parameters

[in]	window	The window whose flag to change.
[in]	value	The new value.

Remarks: This function may be called from secondary threads.

◆ glfwSetWindowSize()

void glfwSetWindowSize	(	GLFWwindow *	window,
		int	width,
		int	height
	)

This function sets the size, in screen coordinates, of the client area of the specified window.

For full screen windows, this function selects and switches to the resolution closest to the specified size, without affecting the window's context. As the context is unaffected, the bit depths of the framebuffer remain unchanged.

Parameters

[in]	window	The window to resize.
[in]	width	The desired width of the specified window.
[in]	height	The desired height of the specified window.

Note: This function may only be called from the main thread.; The window manager may put limits on what window sizes are allowed.

See also: glfwGetWindowSize

◆ glfwSetWindowSizeCallback()

GLFWwindowsizefun glfwSetWindowSizeCallback	(	GLFWwindow *	window,
		GLFWwindowsizefun	cbfun
	)

This function sets the size callback of the specified window, which is called when the window is resized. The callback is provided with the size, in screen coordinates, of the client area of the window.

Parameters

[in]	window	The window whose callback to set.
[in]	cbfun	The new callback, or `NULL` to remove the currently set callback.

Returns: The previously set callback, or NULL if no callback was set or an error occurred.

◆ glfwSetWindowTitle()

void glfwSetWindowTitle	(	GLFWwindow *	window,
		const char *	title
	)

This function sets the window title, encoded as UTF-8, of the specified window.

Parameters

[in]	window	The window whose title to change.
[in]	title	The UTF-8 encoded window title.

Note: This function may only be called from the main thread.

◆ glfwSetWindowUserPointer()

void glfwSetWindowUserPointer	(	GLFWwindow *	window,
		void *	pointer
	)

This function sets the user-defined pointer of the specified window. The current value is retained until the window is destroyed. The initial value is NULL.

Parameters

[in]	window	The window whose pointer to set.
[in]	pointer	The new value.

See also: glfwGetWindowUserPointer

◆ glfwShowWindow()

void glfwShowWindow ( GLFWwindow * window )

This function makes the specified window visible, if it was previously hidden. If the window is already visible or is in full screen mode, this function does nothing.

Parameters

[in] window The window to make visible.

Note: This function may only be called from the main thread.

See also: glfwHideWindow

◆ glfwWaitEvents()

void glfwWaitEvents ( void )

This function puts the calling thread to sleep until at least one event has been received. Once one or more events have been received, it behaves as if glfwPollEvents was called, i.e. the events are processed and the function then returns immediately. Processing events will cause the window and input callbacks associated with those events to be called.

Since not all events are associated with callbacks, this function may return without a callback having been called even if you are monitoring all callbacks.

This function is not required for joystick input to work.

Remarks: On some platforms, a window move, resize or menu operation will cause event processing to block. This is due to how event processing is designed on those platforms. You can use the window refresh callback to redraw the contents of your window when necessary during the operation.

Note: This function may only be called from the main thread.; This function may not be called from a callback.; On some platforms, certain callbacks may be called outside of a call to one of the event processing functions.

See also: glfwPollEvents

◆ glfwWindowHint()

void glfwWindowHint	(	int	target,
		int	hint
	)

This function sets hints for the next call to glfwCreateWindow. The hints, once set, retain their values until changed by a call to glfwWindowHint or glfwDefaultWindowHints, or until the library is terminated with glfwTerminate.

Parameters

[in]	target	The window hint to set.
[in]	hint	The new value of the window hint.

New in GLFW 3: Hints are no longer reset to their default values on window creation. To set default hint values, use glfwDefaultWindowHints.

Note: This function may only be called from the main thread.

See also: glfwDefaultWindowHints

◆ glfwWindowShouldClose()

int glfwWindowShouldClose ( GLFWwindow * window )

This function returns the value of the close flag of the specified window.

Parameters

[in] window The window to query.

Returns: The value of the close flag.

Remarks: This function may be called from secondary threads.

Typedefs

Functions

Detailed Description

Typedef Documentation

◆ GLFWframebuffersizefun

◆ GLFWwindow

◆ GLFWwindowclosefun

◆ GLFWwindowfocusfun

◆ GLFWwindowiconifyfun

◆ GLFWwindowposfun

◆ GLFWwindowrefreshfun

◆ GLFWwindowsizefun

Function Documentation

◆ glfwCreateWindow()

◆ glfwDefaultWindowHints()

◆ glfwDestroyWindow()

◆ glfwGetFramebufferSize()

◆ glfwGetWindowAttrib()

◆ glfwGetWindowMonitor()

◆ glfwGetWindowPos()

◆ glfwGetWindowSize()

◆ glfwGetWindowUserPointer()

◆ glfwHideWindow()

◆ glfwIconifyWindow()

◆ glfwPollEvents()

◆ glfwRestoreWindow()

◆ glfwSetFramebufferSizeCallback()

◆ glfwSetWindowCloseCallback()

◆ glfwSetWindowFocusCallback()

◆ glfwSetWindowIconifyCallback()

◆ glfwSetWindowPos()

◆ glfwSetWindowPosCallback()

◆ glfwSetWindowRefreshCallback()

◆ glfwSetWindowShouldClose()

◆ glfwSetWindowSize()

◆ glfwSetWindowSizeCallback()

◆ glfwSetWindowTitle()

◆ glfwSetWindowUserPointer()

◆ glfwShowWindow()

◆ glfwWaitEvents()

◆ glfwWindowHint()

◆ glfwWindowShouldClose()