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	glfwGetWindowFrameSize (GLFWwindow window, int left, int top, int right, int *bottom)
	Retrieves the size of the frame of the 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 queued and processes them. More...

void	glfwPostEmptyEvent (void)
	Posts an empty event to the event queue. More...

void	glfwSwapBuffers (GLFWwindow *window)
	Swaps the front and back buffers of the specified window. 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 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 gained or lost input focus.
[in]	focused	`GL_TRUE` if the window was given input focus, or `GL_FALSE` if it lost it.

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 was 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 was 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 OpenGL or OpenGL ES context. Most of the options controlling how the window and its context should be created are specified with window hints.

Successful creation does not change which context is current. Before you can use the newly created context, you need to make it current. For information about the share parameter, see Context object sharing.

The created window, framebuffer 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 query the actual attributes of the created window, framebuffer and context, see glfwGetWindowAttrib, glfwGetWindowSize and glfwGetFramebufferSize.

To create a full screen window, you need to specify the monitor the window will cover. 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 query connected monitors, see Retrieving monitors.

For full screen windows, the specified size becomes the resolution of the window's desired video mode. As long as a full screen window has input focus, the supported video mode most closely matching the desired video mode is set for the specified monitor. For more information about full screen windows, including the creation of so called windowed full screen or borderless full screen windows, see "Windowed full screen" windows.

By default, newly created windows use the placement recommended by the window system. 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 has input focus, the screensaver is prohibited from starting.

Window systems put limits on window sizes. Very large or very small window dimensions may be overridden by the window system on creation. Check the actual size after creation.

The swap interval is not set during window creation and the initial value may vary depending on driver settings and defaults.

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.; Windows: The context to share resources with may not be current on any other thread.; 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. For more information on bundles, see the Bundle Programming Guide in the Mac Developer Library.; OS X: The first time a window is created the menu bar is populated with common commands like Hide, Quit and About. The About entry opens a minimal about dialog with information from the application's bundle. The menu bar can be disabled with a compile-time option.; OS X: On OS X 10.10 and later the window frame will not be rendered at full resolution on Retina displays unless the NSHighResolutionCapable key is enabled in the application bundle's Info.plist. For more information, see High Resolution Guidelines for OS X in the Mac Developer Library. The GLFW test and example programs use a custom Info.plist template for this, which can be found as CMake/MacOSXBundleInfo.plist.in in the source tree.; X11: There is no mechanism for setting the window icon yet.; X11: Some window managers will not respect the placement of initially hidden windows.; X11: Due to the asynchronous nature of X11, it may take a moment for a window to reach its requested state. This means you may not be able to query the final size, position or other attributes directly after window creation.

Reentrancy: This function may not be called from a callback.

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

See also: Window creation; glfwDestroyWindow

Since: Added in GLFW 3.0. Replaces glfwOpenWindow.

◆ glfwDefaultWindowHints()

void glfwDefaultWindowHints ( void )

This function resets all window hints to their default values.

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

See also: Window creation hints; glfwWindowHint

Since: Added in GLFW 3.0.

◆ 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.

If the context of the specified window is current on the main thread, it is detached before being destroyed.

Parameters

[in] window The window to destroy.

Note: The context of the specified window must not be current on any other thread when this function is called.

Reentrancy: This function may not be called from a callback.

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

See also: Window creation; glfwCreateWindow

Since: Added in GLFW 3.0. Replaces glfwCloseWindow.

◆ 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.

Any or all of the size arguments may be NULL. If an error occurs, all non-NULL size arguments will be set to zero.

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`.

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

See also: Framebuffer size; glfwSetFramebufferSizeCallback

Since: Added in GLFW 3.0.

◆ glfwGetWindowAttrib()

int glfwGetWindowAttrib	(	GLFWwindow *	window,
		int	attrib
	)

This function returns the value of an attribute of the specified window or its OpenGL or OpenGL ES 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.

Remarks: Framebuffer related hints are not window attributes. See Framebuffer related attributes for more information.; Zero is a valid value for many window and context related attributes so you cannot use a return value of zero as an indication of errors. However, this function should not fail as long as it is passed valid arguments and the library has been initialized.

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

See also: Window attributes

Since: Added in GLFW 3.0. Replaces glfwGetWindowParam and glfwGetGLVersion.

◆ glfwGetWindowFrameSize()

void glfwGetWindowFrameSize	(	GLFWwindow *	window,
		int *	left,
		int *	top,
		int *	right,
		int *	bottom
	)

This function retrieves the size, in screen coordinates, of each edge of the frame of the specified window. This size includes the title bar, if the window has one. The size of the frame may vary depending on the window-related hints used to create it.

Because this function retrieves the size of each window frame edge and not the offset along a particular coordinate axis, the retrieved values will always be zero or positive.

Any or all of the size arguments may be NULL. If an error occurs, all non-NULL size arguments will be set to zero.

Parameters

[in]	window	The window whose frame size to query.
[out]	left	Where to store the size, in screen coordinates, of the left edge of the window frame, or `NULL`.
[out]	top	Where to store the size, in screen coordinates, of the top edge of the window frame, or `NULL`.
[out]	right	Where to store the size, in screen coordinates, of the right edge of the window frame, or `NULL`.
[out]	bottom	Where to store the size, in screen coordinates, of the bottom edge of the window frame, or `NULL`.

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

See also: Window size

Since: Added in GLFW 3.1.

◆ 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 or an error occurred.

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

See also: Window monitor

Since: Added in GLFW 3.0.

◆ 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.

Any or all of the position arguments may be NULL. If an error occurs, all non-NULL position arguments will be set to zero.

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`.

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

See also: Window position; glfwSetWindowPos

Since: Added in GLFW 3.0.

◆ 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 of the window in pixels, see glfwGetFramebufferSize.

Any or all of the size arguments may be NULL. If an error occurs, all non-NULL size arguments will be set to zero.

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`.

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

See also: Window size; glfwSetWindowSize

Since: Added in GLFW 1.0.

: GLFW 3: Added window handle parameter.

◆ 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.

Thread Safety: This function may be called from any thread. Access is not synchronized.

See also: User pointer; glfwSetWindowUserPointer

Since: Added in GLFW 3.0.

◆ 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.

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

See also: Window visibility; glfwShowWindow

Since: Added in GLFW 3.0.

◆ glfwIconifyWindow()

void glfwIconifyWindow ( GLFWwindow * window )

This function iconifies (minimizes) the specified window if it was previously restored. If the window is already iconified, this function does nothing.

If the specified window is a full screen window, the original monitor resolution is restored until the window is restored.

Parameters

[in] window The window to iconify.

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

See also: Window iconification; glfwRestoreWindow

Since: Added in GLFW 2.1.

: GLFW 3: Added window handle parameter.

◆ glfwPollEvents()

void glfwPollEvents ( void )

This function processes only those events that are already in the event queue and then returns immediately. Processing events will cause the window and input callbacks associated with those events to be called.

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 such operations.

On some platforms, certain events are sent directly to the application without going through the event queue, causing callbacks to be called outside of a call to one of the event processing functions.

Event processing is not required for joystick input to work.

Reentrancy: This function may not be called from a callback.

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

See also: Event processing; glfwWaitEvents

Since: Added in GLFW 1.0.

◆ glfwPostEmptyEvent()

void glfwPostEmptyEvent ( void )

This function posts an empty event from the current thread to the event queue, causing glfwWaitEvents to return.

If no windows exist, this function returns immediately. For synchronization of threads in applications that do not create windows, use your threading library of choice.

Thread Safety: This function may be called from any thread.

See also: Event processing; glfwWaitEvents

Since: Added in GLFW 3.1.

◆ glfwRestoreWindow()

void glfwRestoreWindow ( GLFWwindow * window )

This function restores the specified window if it was previously iconified (minimized). If the window is already restored, this function does nothing.

If the specified window is a full screen window, the resolution chosen for the window is restored on the selected monitor.

Parameters

[in] window The window to restore.

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

See also: Window iconification; glfwIconifyWindow

Since: Added in GLFW 2.1.

: GLFW 3: Added window handle parameter.

◆ 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 the library had not been initialized.

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

See also: Framebuffer size

Since: Added in GLFW 3.0.

◆ 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 the library had not been initialized.

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

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

See also: Window closing and close flag

Since: Added in GLFW 2.5.

: GLFW 3: Added window handle parameter. Updated callback signature.

◆ 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 input focus.

After the focus callback is called for a window that lost input 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 the library had not been initialized.

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

See also: Window input focus

Since: Added in GLFW 3.0.

◆ 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 the library had not been initialized.

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

See also: Window iconification

Since: Added in GLFW 3.0.

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

Do not use this function to move an already visible window unless you have very good reasons for doing so, as it will confuse and annoy the user.

The window manager may put limits on what positions are allowed. GLFW cannot and should not override these limits.

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.

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

See also: Window position; glfwGetWindowPos

Since: Added in GLFW 1.0.

: GLFW 3: Added window handle parameter.

◆ 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 the library had not been initialized.

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

See also: Window position

Since: Added in GLFW 3.0.

◆ 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 the library had not been initialized.

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

See also: Window damage and refresh

Since: Added in GLFW 2.5.

: GLFW 3: Added window handle parameter. Updated callback signature.

◆ 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.

Thread Safety: This function may be called from any thread. Access is not synchronized.

See also: Window closing and close flag

Since: Added in GLFW 3.0.

◆ 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.

The window manager may put limits on what sizes are allowed. GLFW cannot and should not override these limits.

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.

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

See also: Window size; glfwGetWindowSize

Since: Added in GLFW 1.0.

: GLFW 3: Added window handle parameter.

◆ 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 the library had not been initialized.

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

See also: Window size

Since: Added in GLFW 1.0.

: GLFW 3: Added window handle parameter. Updated callback signature.

◆ 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.

Remarks: OS X: The window title will not be updated until the next time you process events.

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

See also: Window title

Since: Added in GLFW 1.0.

: GLFW 3: Added window handle parameter.

◆ 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.

Thread Safety: This function may be called from any thread. Access is not synchronized.

See also: User pointer; glfwGetWindowUserPointer

Since: Added in GLFW 3.0.

◆ 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.

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

See also: Window visibility; glfwHideWindow

Since: Added in GLFW 3.0.

◆ glfwSwapBuffers()

void glfwSwapBuffers ( GLFWwindow * window )

This function swaps the front and back buffers of the specified window. If the swap interval is greater than zero, the GPU driver waits the specified number of screen updates before swapping the buffers.

Parameters

[in] window The window whose buffers to swap.

Thread Safety: This function may be called from any thread.

See also: Buffer swapping; glfwSwapInterval

Since: Added in GLFW 1.0.

: GLFW 3: Added window handle parameter.

◆ glfwWaitEvents()

void glfwWaitEvents ( void )

This function puts the calling thread to sleep until at least one event is available in the event queue. Once one or more events are available, it behaves exactly like glfwPollEvents, i.e. the events in the queue 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.

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 such operations.

On some platforms, certain callbacks may be called outside of a call to one of the event processing functions.

If no windows exist, this function returns immediately. For synchronization of threads in applications that do not create windows, use your threading library of choice.

Event processing is not required for joystick input to work.

Reentrancy: This function may not be called from a callback.

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

See also: Event processing; glfwPollEvents

Since: Added in GLFW 2.5.

◆ 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.

Parameters

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

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

See also: Window creation hints; glfwDefaultWindowHints

Since: Added in GLFW 3.0. Replaces glfwOpenWindowHint.

◆ 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.

Thread Safety: This function may be called from any thread. Access is not synchronized.

See also: Window closing and close flag

Since: Added in GLFW 3.0.

Typedefs

Functions

Detailed Description

Typedef Documentation

◆ GLFWframebuffersizefun

◆ GLFWwindow

◆ GLFWwindowclosefun

◆ GLFWwindowfocusfun

◆ GLFWwindowiconifyfun

◆ GLFWwindowposfun

◆ GLFWwindowrefreshfun

◆ GLFWwindowsizefun

Function Documentation

◆ glfwCreateWindow()

◆ glfwDefaultWindowHints()

◆ glfwDestroyWindow()

◆ glfwGetFramebufferSize()

◆ glfwGetWindowAttrib()

◆ glfwGetWindowFrameSize()

◆ glfwGetWindowMonitor()

◆ glfwGetWindowPos()

◆ glfwGetWindowSize()

◆ glfwGetWindowUserPointer()

◆ glfwHideWindow()

◆ glfwIconifyWindow()

◆ glfwPollEvents()

◆ glfwPostEmptyEvent()

◆ glfwRestoreWindow()

◆ glfwSetFramebufferSizeCallback()

◆ glfwSetWindowCloseCallback()

◆ glfwSetWindowFocusCallback()

◆ glfwSetWindowIconifyCallback()

◆ glfwSetWindowPos()

◆ glfwSetWindowPosCallback()

◆ glfwSetWindowRefreshCallback()

◆ glfwSetWindowShouldClose()

◆ glfwSetWindowSize()

◆ glfwSetWindowSizeCallback()

◆ glfwSetWindowTitle()

◆ glfwSetWindowUserPointer()

◆ glfwShowWindow()

◆ glfwSwapBuffers()

◆ glfwWaitEvents()

◆ glfwWindowHint()

◆ glfwWindowShouldClose()