glfw

package
v2.8.5 Latest Latest
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 Go to latest Published: Nov 17, 2024 License: Apache-2.0 Imports: 8 Imported by: 0

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Index

Constants

View Source 
const (
	DontCare = -1
	False    = 0
	True     = 1
)
View Source 
const (
	Release = Action(0)
	Press   = Action(1)
	Repeat  = Action(2)
)
View Source 
const (
	ModAlt      = ModifierKey(0x0004)
	ModCapsLock = ModifierKey(0x0010)
	ModControl  = ModifierKey(0x0002)
	ModNumLock  = ModifierKey(0x0020)
	ModShift    = ModifierKey(0x0001)
	ModSuper    = ModifierKey(0x0008)
)
View Source 
const (
	MouseButton1      = MouseButton(0)
	MouseButton2      = MouseButton(1)
	MouseButton3      = MouseButton(2)
	MouseButton4      = MouseButton(3)
	MouseButton5      = MouseButton(4)
	MouseButton6      = MouseButton(5)
	MouseButton7      = MouseButton(6)
	MouseButton8      = MouseButton(7)
	MouseButtonLast   = MouseButton8
	MouseButtonLeft   = MouseButton1
	MouseButtonRight  = MouseButton2
	MouseButtonMiddle = MouseButton3
)
View Source 
const (
	AccumAlphaBits         = Hint(0x0002100A)
	AccumBlueBits          = Hint(0x00021009)
	AccumGreenBits         = Hint(0x00021008)
	AccumRedBits           = Hint(0x00021007)
	AlphaBits              = Hint(0x00021004)
	AutoIconify            = Hint(0x00020006)
	AuxBuffers             = Hint(0x0002100B)
	BlueBits               = Hint(0x00021003)
	CenterCursor           = Hint(0x00020009)
	ClientAPI              = Hint(0x00022001)
	ContextCreationAPI     = Hint(0x0002200B)
	ContextNoError         = Hint(0x0002200A)
	ContextReleaseBehavior = Hint(0x00022009)
	ContextRevision        = Hint(0x00022004)
	ContextRobustness      = Hint(0x00022005)
	ContextVersionMajor    = Hint(0x00022002)
	ContextVersionMinor    = Hint(0x00022003)
	Decorated              = Hint(0x00020005)
	DepthBits              = Hint(0x00021005)
	DoubleBuffer           = Hint(0x00021010)
	Floating               = Hint(0x00020007)
	Focused                = Hint(0x00020001)
	FocusOnShow            = Hint(0x0002000C)
	GreenBits              = Hint(0x00021002)
	Hovered                = Hint(0x0002000B)
	Iconified              = Hint(0x00020002)
	Maximized              = Hint(0x00020008)
	MousePassthrough       = Hint(0x0002000D)
	OpenGLDebugContext     = Hint(0x00022007)
	OpenGLForwardCompat    = Hint(0x00022006)
	OpenGLProfile          = Hint(0x00022008)
	RedBits                = Hint(0x00021001)
	RefreshRate            = Hint(0x0002100F)
	Resizable              = Hint(0x00020003)
	Samples                = Hint(0x0002100D)
	ScaleToMonitor         = Hint(0x0002200C)
	SRGBCapable            = Hint(0x0002100E)
	StencilBits            = Hint(0x00021006)
	Stereo                 = Hint(0x0002100C)
	TransparentFramebuffer = Hint(0x0002000A)
	Visible                = Hint(0x00020004)
	X11ClassName           = Hint(0x00024001)
	X11InstanceName        = Hint(0x00024002)
)
View Source 
const (
	CursorMode             = InputMode(0x00033001)
	LockKeyMods            = InputMode(0x00033004)
	RawMouseMotion         = InputMode(0x00033005)
	StickyKeysMode         = InputMode(0x00033002)
	StickyMouseButtonsMode = InputMode(0x00033003)
)
View Source 
const (
	AnyReleaseBehavior   = 0
	CursorDisabled       = 0x00034003
	CursorHidden         = 0x00034002
	CursorNormal         = 0x00034001
	EGLContextAPI        = 0x00036002
	LoseContextOnReset   = 0x00031002
	NativeContextAPI     = 0x00036001
	NoAPI                = 0
	NoResetNotification  = 0x00031001
	NoRobustness         = 0
	OpenGLAPI            = 0x00030001
	OpenGLAnyProfile     = 0
	OpenGLCompatProfile  = 0x00032002
	OpenGLCoreProfile    = 0x00032001
	OpenGLESAPI          = 0x00030002
	OSMesaContextAPI     = 0x00036003
	ReleaseBehaviorFlush = 0x00035001
	ReleaseBehaviorNone  = 0x00035002
)
View Source 
const (
	NotInitialized     = ErrorCode(0x00010001)
	NoCurrentContext   = ErrorCode(0x00010002)
	InvalidEnum        = ErrorCode(0x00010003)
	InvalidValue       = ErrorCode(0x00010004)
	OutOfMemory        = ErrorCode(0x00010005)
	APIUnavailable     = ErrorCode(0x00010006)
	VersionUnavailable = ErrorCode(0x00010007)
	PlatformError      = ErrorCode(0x00010008)
	FormatUnavailable  = ErrorCode(0x00010009)
	NoWindowContext    = ErrorCode(0x0001000A)
)
View Source 
const (
	Connected    = PeripheralEvent(0x00040001)
	Disconnected = PeripheralEvent(0x00040002)
)
View Source 
const (
	ArrowCursor     = StandardCursor(0x00036001)
	IBeamCursor     = StandardCursor(0x00036002)
	CrosshairCursor = StandardCursor(0x00036003)
	HandCursor      = StandardCursor(0x00036004)
	HResizeCursor   = StandardCursor(0x00036005)
	VResizeCursor   = StandardCursor(0x00036006)

	// v3.4
	ResizeNWSECursor = StandardCursor(0x00036007)
	ResizeNESWCursor = StandardCursor(0x00036008)
	ResizeAllCursor  = StandardCursor(0x00036009)
	NotAllowedCursor = StandardCursor(0x0003600A)
)
View Source 
const (
	VersionMajor    = C.GLFW_VERSION_MAJOR    // This is incremented when the API is changed in non-compatible ways.
	VersionMinor    = C.GLFW_VERSION_MINOR    // This is incremented when features are added to the API but it remains backward-compatible.
	VersionRevision = C.GLFW_VERSION_REVISION // This is incremented when a bug fix release is made that does not contain any API changes.
)

Version constants.

View Source 
const (
	Key0            = Key(48)
	Key1            = Key(49)
	Key2            = Key(50)
	Key3            = Key(51)
	Key4            = Key(52)
	Key5            = Key(53)
	Key6            = Key(54)
	Key7            = Key(55)
	Key8            = Key(56)
	Key9            = Key(57)
	KeyA            = Key(65)
	KeyApostrophe   = Key(39)
	KeyB            = Key(66)
	KeyBackslash    = Key(92)
	KeyBackspace    = Key(259)
	KeyC            = Key(67)
	KeyCapsLock     = Key(280)
	KeyComma        = Key(44)
	KeyD            = Key(68)
	KeyDelete       = Key(261)
	KeyDown         = Key(264)
	KeyE            = Key(69)
	KeyEnd          = Key(269)
	KeyEnter        = Key(257)
	KeyEqual        = Key(61)
	KeyEscape       = Key(256)
	KeyF            = Key(70)
	KeyF1           = Key(290)
	KeyF10          = Key(299)
	KeyF11          = Key(300)
	KeyF12          = Key(301)
	KeyF13          = Key(302)
	KeyF14          = Key(303)
	KeyF15          = Key(304)
	KeyF16          = Key(305)
	KeyF17          = Key(306)
	KeyF18          = Key(307)
	KeyF19          = Key(308)
	KeyF2           = Key(291)
	KeyF20          = Key(309)
	KeyF21          = Key(310)
	KeyF22          = Key(311)
	KeyF23          = Key(312)
	KeyF24          = Key(313)
	KeyF3           = Key(292)
	KeyF4           = Key(293)
	KeyF5           = Key(294)
	KeyF6           = Key(295)
	KeyF7           = Key(296)
	KeyF8           = Key(297)
	KeyF9           = Key(298)
	KeyG            = Key(71)
	KeyGraveAccent  = Key(96)
	KeyH            = Key(72)
	KeyHome         = Key(268)
	KeyI            = Key(73)
	KeyInsert       = Key(260)
	KeyJ            = Key(74)
	KeyK            = Key(75)
	KeyKP0          = Key(320)
	KeyKP1          = Key(321)
	KeyKP2          = Key(322)
	KeyKP3          = Key(323)
	KeyKP4          = Key(324)
	KeyKP5          = Key(325)
	KeyKP6          = Key(326)
	KeyKP7          = Key(327)
	KeyKP8          = Key(328)
	KeyKP9          = Key(329)
	KeyKPAdd        = Key(334)
	KeyKPDecimal    = Key(330)
	KeyKPDivide     = Key(331)
	KeyKPEnter      = Key(335)
	KeyKPEqual      = Key(336)
	KeyKPMultiply   = Key(332)
	KeyKPSubtract   = Key(333)
	KeyL            = Key(76)
	KeyLast         = Key(348)
	KeyLeft         = Key(263)
	KeyLeftAlt      = Key(342)
	KeyLeftBracket  = Key(91)
	KeyLeftControl  = Key(341)
	KeyLeftShift    = Key(340)
	KeyLeftSuper    = Key(343)
	KeyM            = Key(77)
	KeyMenu         = Key(348)
	KeyMinus        = Key(45)
	KeyN            = Key(78)
	KeyNumLock      = Key(282)
	KeyO            = Key(79)
	KeyP            = Key(80)
	KeyPageDown     = Key(267)
	KeyPageUp       = Key(266)
	KeyPause        = Key(284)
	KeyPeriod       = Key(46)
	KeyPrintScreen  = Key(283)
	KeyQ            = Key(81)
	KeyR            = Key(82)
	KeyRight        = Key(262)
	KeyRightAlt     = Key(346)
	KeyRightBracket = Key(93)
	KeyRightControl = Key(345)
	KeyRightShift   = Key(344)
	KeyRightSuper   = Key(347)
	KeyS            = Key(83)
	KeyScrollLock   = Key(281)
	KeySemicolon    = Key(59)
	KeySlash        = Key(47)
	KeySpace        = Key(32)
	KeyT            = Key(84)
	KeyTab          = Key(258)
	KeyU            = Key(85)
	KeyUnknown      = Key(-1)
	KeyUp           = Key(265)
	KeyV            = Key(86)
	KeyW            = Key(87)
	KeyWorld1       = Key(161)
	KeyWorld2       = Key(162)
	KeyX            = Key(88)
	KeyY            = Key(89)
	KeyZ            = Key(90)
)

Variables

This section is empty.

Functions

func DefaultWindowHints added in v2.7.0 

func DefaultWindowHints() error

DefaultWindowHints resets all window hints to their default values.

This function may only be called from the main thread.

func DetachCurrentContext added in v2.7.0 

func DetachCurrentContext() error

DetachCurrentContext detaches the current context.

func ExtensionSupported added in v2.7.0 

func ExtensionSupported(extension string) (bool, error)

ExtensionSupported reports whether the specified OpenGL or context creation API extension is supported by the current context. For example, on Windows both the OpenGL and WGL extension strings are checked.

As this functions searches one or more extension strings on each call, it is recommended that you cache its results if it's going to be used frequently. The extension strings will not change during the lifetime of a context, so there is no danger in doing this.

func GetClipboardString added in v2.7.0 

func GetClipboardString() (string, error)

GetClipboardString returns the contents of the system clipboard, if it contains or is convertible to a UTF-8 encoded string.

This function may only be called from the main thread.

func GetKeyName added in v2.5.0 

func GetKeyName(key Key, scancode int) (string, error)

GetKeyName returns the localized name of the specified printable key.

If the key is glfw.KeyUnknown, the scancode is used, otherwise the scancode is ignored.

func GetKeyScancode added in v2.7.0 

func GetKeyScancode(key Key) int

GetKeyScancode function returns the platform-specific scancode of the specified key.

If the key is KeyUnknown or does not exist on the keyboard this method will return -1.

func GetProcAddress added in v2.7.0 

func GetProcAddress(procname string) (unsafe.Pointer, error)

GetProcAddress returns the address of the specified OpenGL or OpenGL ES core or extension function, if it is supported by the current context.

A context must be current on the calling thread. Calling this function without a current context will cause a GLFW_NO_CURRENT_CONTEXT error.

This function is used to provide GL proc resolving capabilities to an external C library.

func GetVersion added in v2.7.0 

func GetVersion() (major, minor, revision int)

GetVersion retrieves the major, minor and revision numbers of the GLFW library. It is intended for when you are using GLFW as a shared library and want to ensure that you are using the minimum required version.

This function may be called before Init.

func GetVersionString added in v2.7.0 

func GetVersionString() string

GetVersionString returns a static string generated at compile-time according to which configuration macros were defined. This is intended for use when submitting bug reports, to allow developers to see which code paths are enabled in a binary.

This function may be called before Init.

func GetX11Display added in v2.7.0 

func GetX11Display() (*C.Display, error)

func GetX11SelectionString added in v2.7.0 

func GetX11SelectionString() string

GetX11SelectionString gets the X11 selection string.

func Init 

func Init() error

Init initializes the GLFW library. Before most GLFW functions can be used, GLFW must be initialized, and before a program terminates GLFW should be terminated in order to free any resources allocated during or after initialization.

If this function fails, it calls Terminate before returning. If it succeeds, you should call Terminate before the program exits.

Additional calls to this function after successful initialization but before termination will succeed but will do nothing.

This function may take several seconds to complete on some systems, while on other systems it may take only a fraction of a second to complete.

On Mac OS X, this function will change the current directory of the application to the Contents/Resources subdirectory of the application's bundle, if present.

This function may only be called from the main thread.

func InitHint added in v2.7.0 

func InitHint(hint Hint, value int)

InitHint function sets hints for the next initialization of GLFW.

The values you set hints to are never reset by GLFW, but they only take effect during initialization. Once GLFW has been initialized, any values you set will be ignored until the library is terminated and initialized again.

Some hints are platform specific. These may be set on any platform but they will only affect their specific platform. Other platforms will ignore them. Setting these hints requires no platform specific headers or functions.

This function must only be called from the main thread.

func PollEvents 

func PollEvents() error

PollEvents 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.

This function may not be called from a callback.

This function may only be called from the main thread.

func PostEmptyEvent added in v2.2.0 

func PostEmptyEvent() error

PostEmptyEvent posts an empty event from the current thread to the main thread event queue, causing WaitEvents to return.

If no windows exist, this function returns immediately. For synchronization of threads in applications that do not create windows, use native Go primitives.

This function may be called from secondary threads.

func RawMouseMotionSupported added in v2.7.0 

func RawMouseMotionSupported() bool

RawMouseMotionSupported returns whether raw mouse motion is supported on the current system. This status does not change after GLFW has been initialized so you only need to check this once. If you attempt to enable raw motion on a system that does not support it, PlatformError will be emitted.

Raw mouse motion is closer to the actual motion of the mouse across a surface. It is not affected by the scaling and acceleration applied to the motion of the desktop cursor. That processing is suitable for a cursor while raw motion is better for controlling for example a 3D camera. Because of this, raw mouse motion is only provided when the cursor is disabled.

This function must only be called from the main thread.

func SetClipboardString added in v2.7.0 

func SetClipboardString(str string) error

SetClipboardString sets the system clipboard to the specified UTF-8 encoded string.

This function may only be called from the main thread.

func SetX11SelectionString added in v2.7.0 

func SetX11SelectionString(str string)

SetX11SelectionString sets the X11 selection string.

func SwapInterval 

func SwapInterval(interval int) error

SwapInterval sets the swap interval for the current context, i.e. the number of screen updates to wait before swapping the buffers of a window and returning from SwapBuffers. This is sometimes called 'vertical synchronization', 'vertical retrace synchronization' or 'vsync'.

Contexts that support either of the WGL_EXT_swap_control_tear and GLX_EXT_swap_control_tear extensions also accept negative swap intervals, which allow the driver to swap even if a frame arrives a little bit late. You can check for the presence of these extensions using ExtensionSupported. For more information about swap tearing, see the extension specifications.

Some GPU drivers do not honor the requested swap interval, either because of user settings that override the request or due to bugs in the driver.

func Terminate 

func Terminate() error

Terminate destroys all remaining windows, frees any allocated resources and sets the library to an uninitialized state. Once this is called, you must again call Init successfully before you will be able to use most GLFW functions.

If GLFW has been successfully initialized, this function should be called before the program exits. If initialization fails, there is no need to call this function, as it is called by Init before it returns failure.

This function may only be called from the main thread.

func WaitEvents added in v2.2.0 

func WaitEvents() error

WaitEvents puts the calling thread to sleep until at least one event has been received. Once one or more events have been recevied, it behaves as if PollEvents 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 may not be called from a callback.

This function may only be called from the main thread.

func WaitEventsTimeout added in v2.2.0 

func WaitEventsTimeout(timeout float64) error

WaitEventsTimeout puts the calling thread to sleep until at least one event is available in the event queue, or until the specified timeout is reached. If one or more events are available, it behaves exactly like PollEvents, 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.

The timeout value must be a positive finite number.

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 native Go primitives.

Event processing is not required for joystick input to work.

func WindowHint 

func WindowHint(target Hint, hint int) error

WindowHint sets hints for the next call to CreateWindow. The hints, once set, retain their values until changed by a call to WindowHint or DefaultWindowHints, or until the library is terminated with Terminate.

This function may only be called from the main thread.

func WindowHintString added in v2.7.0 

func WindowHintString(hint Hint, value string) error

WindowHintString sets hints for the next call to CreateWindow. The hints, once set, retain their values until changed by a call to this function or DefaultWindowHints, or until the library is terminated.

Only string type hints can be set with this function. Integer value hints are set with WindowHint.

This function does not check whether the specified hint values are valid. If you set hints to invalid values this will instead be reported by the next call to CreateWindow.

Some hints are platform specific. These may be set on any platform but they will only affect their specific platform. Other platforms will ignore them. Setting these hints requires no platform specific headers or functions.

This function must only be called from the main thread.

Types

type Action 

type Action int

type CharCallback added in v2.7.0 

type CharCallback func(w *Window, char rune)

CharCallback is the character callback.

type CharModsCallback 

type CharModsCallback func(w *Window, char rune, mods ModifierKey)

CharModsCallback is the character with modifiers callback.

type CloseCallback added in v2.2.0 

type CloseCallback func(w *Window)

CloseCallback is the window close callback.

type ContentScaleCallback added in v2.7.0 

type ContentScaleCallback func(w *Window, x float32, y float32)

ContentScaleCallback is the function signature for window content scale callback functions.

type Cursor added in v2.1.0 

type Cursor struct {
	// contains filtered or unexported fields
}

Cursor represents a cursor.

func CreateCursor added in v2.7.0 

func CreateCursor(img image.Image, xhot, yhot int) (*Cursor, error)

CreateCursor creates a new custom cursor image that can be set for a window with SetCursor. The cursor can be destroyed with Destroy. Any remaining cursors are destroyed by Terminate.

The image is ideally provided in the form of *image.NRGBA. The pixels are 32-bit, little-endian, non-premultiplied RGBA, i.e. eight bits per channel with the red channel first. They are arranged canonically as packed sequential rows, starting from the top-left corner. If the image type is not *image.NRGBA, it will be converted to it.

The cursor hotspot is specified in pixels, relative to the upper-left corner of the cursor image. Like all other coordinate systems in GLFW, the X-axis points to the right and the Y-axis points down.

func CreateStandardCursor added in v2.1.0 

func CreateStandardCursor(shape StandardCursor) (*Cursor, error)

CreateStandardCursor returns a cursor with a standard shape, that can be set for a window with SetCursor.

func (*Cursor) Destroy added in v2.7.0 

func (c *Cursor) Destroy() error

Destroy destroys a cursor previously created with CreateCursor. Any remaining cursors will be destroyed by Terminate.

type CursorEnterCallback added in v2.7.0 

type CursorEnterCallback func(w *Window, entered bool)

CursorEnterCallback is the cursor boundary crossing callback.

type CursorPosCallback added in v2.7.0 

type CursorPosCallback func(w *Window, xpos float64, ypos float64)

CursorPosCallback the cursor position callback.

type DropCallback added in v2.5.0 

type DropCallback func(w *Window, names []string)

DropCallback is the drop callback.

type ErrorCode 

type ErrorCode int

func (ErrorCode) Error added in v2.7.0 

func (e ErrorCode) Error() string

type FocusCallback added in v2.7.0 

type FocusCallback func(w *Window, focused bool)

FocusCallback is the window focus callback.

type FramebufferSizeCallback 

type FramebufferSizeCallback func(w *Window, width int, height int)

FramebufferSizeCallback is the framebuffer size callback.

type GammaRamp added in v2.7.0 

type GammaRamp struct {
	Red   []uint16 // A slice of value describing the response of the red channel.
	Green []uint16 // A slice of value describing the response of the green channel.
	Blue  []uint16 // A slice of value describing the response of the blue channel.
}

GammaRamp describes the gamma ramp for a monitor.

type Hint 

type Hint int

type IconifyCallback added in v2.7.0 

type IconifyCallback func(w *Window, iconified bool)

IconifyCallback is the window iconification callback.

type Image added in v2.7.0 

type Image struct {
	Width  int
	Height int
	Pixels []byte
}

type InputMode 

type InputMode int

type Key 

type Key int

type KeyCallback added in v2.7.0 

type KeyCallback func(w *Window, key Key, scancode int, action Action, mods ModifierKey)

KeyCallback is the key callback.

type MaximizeCallback added in v2.7.0 

type MaximizeCallback func(w *Window, maximized bool)

MaximizeCallback is the function signature for window maximize callback functions.

type ModifierKey 

type ModifierKey int

type Monitor 

type Monitor struct {
	// contains filtered or unexported fields
}

Monitor represents a monitor.

func GetMonitors 

func GetMonitors() ([]*Monitor, error)

GetMonitors returns a slice of handles for all currently connected monitors.

func GetPrimaryMonitor 

func GetPrimaryMonitor() (*Monitor, error)

GetPrimaryMonitor returns the primary monitor. This is usually the monitor where elements like the Windows task bar or the OS X menu bar is located.

func (*Monitor) GetContentScale 

func (m *Monitor) GetContentScale() (float32, float32, error)

GetContentScale function retrieves the content scale for the specified monitor. The content scale is the ratio between the current DPI and the platform's default DPI. If you scale all pixel dimensions by this scale then your content should appear at an appropriate size. This is especially important for text and any UI elements.

This function must only be called from the main thread.

func (*Monitor) GetGammaRamp added in v2.7.0 

func (m *Monitor) GetGammaRamp() (*GammaRamp, error)

GetGammaRamp retrieves the current gamma ramp of the monitor.

func (*Monitor) GetName added in v2.6.0 

func (m *Monitor) GetName() (string, error)

GetName returns a human-readable name of the monitor, encoded as UTF-8.

func (*Monitor) GetPhysicalSize added in v2.7.0 

func (m *Monitor) GetPhysicalSize() (width, height int, err error)

GetPhysicalSize returns the size, in millimetres, of the display area of the monitor.

Note: Some operating systems do not provide accurate information, either because the monitor's EDID data is incorrect, or because the driver does not report it accurately.

func (*Monitor) GetPos 

func (m *Monitor) GetPos() (x, y int, err error)

GetPos returns the position, in screen coordinates, of the upper-left corner of the monitor.

func (*Monitor) GetUserPointer added in v2.7.0 

func (m *Monitor) GetUserPointer() unsafe.Pointer

GetUserPointer returns the current value of the user-defined pointer of the monitor. The initial value is nil.

This function may be called from the monitor callback, even for a monitor that is being disconnected.

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

func (*Monitor) GetVideoMode 

func (m *Monitor) GetVideoMode() (*VidMode, error)

GetVideoMode returns the current video mode of the monitor. If you are using a full screen window, the return value will therefore depend on whether it is focused.

func (*Monitor) GetVideoModes added in v2.7.0 

func (m *Monitor) GetVideoModes() ([]*VidMode, error)

GetVideoModes returns an array of all video modes supported by the monitor. The returned array is sorted in ascending order, first by color bit depth (the sum of all channel depths) and then by resolution area (the product of width and height).

func (*Monitor) GetWorkarea added in v2.7.0 

func (m *Monitor) GetWorkarea() (x, y, width, height int)

GetWorkarea returns the position, in screen coordinates, of the upper-left corner of the work area of the specified monitor along with the work area size in screen coordinates. The work area is defined as the area of the monitor not occluded by the operating system task bar where present. If no task bar exists then the work area is the monitor resolution in screen coordinates.

This function must only be called from the main thread.

func (*Monitor) GetX11Adapter added in v2.7.0 

func (m *Monitor) GetX11Adapter() (C.RRCrtc, error)

GetX11Adapter returns the RRCrtc of the monitor.

func (*Monitor) GetX11Monitor added in v2.7.0 

func (m *Monitor) GetX11Monitor() (C.RROutput, error)

GetX11Monitor returns the RROutput of the monitor.

func (*Monitor) SetGamma added in v2.7.0 

func (m *Monitor) SetGamma(gamma float32) error

SetGamma generates a 256-element gamma ramp from the specified exponent and then calls SetGamma with it.

func (*Monitor) SetGammaRamp added in v2.7.0 

func (m *Monitor) SetGammaRamp(ramp *GammaRamp) error

SetGammaRamp sets the current gamma ramp for the monitor.

func (*Monitor) SetUserPointer added in v2.7.0 

func (m *Monitor) SetUserPointer(pointer unsafe.Pointer)

SetUserPointer sets the user-defined pointer of the monitor. The current value is retained until the monitor is disconnected. The initial value is nil.

This function may be called from the monitor callback, even for a monitor that is being disconnected.

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

type MonitorCallback added in v2.4.0 

type MonitorCallback func(monitor *Monitor, event PeripheralEvent)

MonitorCallback is the signature for monitor configuration callback functions.

func SetMonitorCallback 

func SetMonitorCallback(cbfun MonitorCallback) (MonitorCallback, error)

SetMonitorCallback sets the monitor configuration callback, or removes the currently set callback. This is called when a monitor is connected to or disconnected from the system.

This function must only be called from the main thread.

type MouseButton 

type MouseButton int

type MouseButtonCallback added in v2.7.0 

type MouseButtonCallback func(w *Window, button MouseButton, action Action, mods ModifierKey)

MouseButtonCallback is the mouse button callback.

type PeripheralEvent 

type PeripheralEvent int

type PosCallback added in v2.7.0 

type PosCallback func(w *Window, xpos int, ypos int)

PosCallback is the window position callback.

type RefreshCallback added in v2.7.0 

type RefreshCallback func(w *Window)

RefreshCallback is the window refresh callback.

type ScrollCallback 

type ScrollCallback func(w *Window, xoff float64, yoff float64)

ScrollCallback is the scroll callback.

type SizeCallback 

type SizeCallback func(w *Window, width int, height int)

SizeCallback is the window size callback.

type StandardCursor added in v2.1.0 

type StandardCursor int

type VidMode 

type VidMode struct {
	Width       int
	Height      int
	RedBits     int
	GreenBits   int
	BlueBits    int
	RefreshRate int
}

type Window 

type Window struct {
	// contains filtered or unexported fields
}

Window represents a window.

func CreateWindow 

func CreateWindow(width, height int, title string, monitor *Monitor, share *Window) (*Window, error)

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

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

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 Window.GetAttrib and Window.GetSize.

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

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

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.

Mac 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.

This function may only be called from the main thread.

func GetCurrentContext added in v2.7.0 

func GetCurrentContext() (*Window, error)

GetCurrentContext returns the window whose context is current.

func GoWindow added in v2.7.0 

func GoWindow(window unsafe.Pointer) *Window

GoWindow creates a Window from a *C.GLFWwindow reference. Used when an external C library is calling your Go handlers.

func (*Window) Destroy 

func (w *Window) Destroy() error

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

This function may only be called from the main thread.

func (*Window) Focus added in v2.4.0 

func (w *Window) Focus() error

Focus brings the specified window to front and sets input focus. The window should already be visible and not iconified.

By default, both windowed and full screen mode windows are focused when initially created. Set the glfw.Focused to disable this behavior.

Do not use this function to steal focus from other applications unless you are certain that is what the user wants. Focus stealing can be extremely disruptive.

func (*Window) GetAttrib 

func (w *Window) GetAttrib(attrib Hint) (int, error)

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

func (*Window) GetClipboardString added in v2.7.0 

func (w *Window) GetClipboardString() (string, error)

GetClipboardString returns the contents of the system clipboard, if it contains or is convertible to a UTF-8 encoded string.

Ownership to the Window is no longer necessary, see glfw.GetClipboardString()

This function may only be called from the main thread.

func (*Window) GetContentScale added in v2.7.0 

func (w *Window) GetContentScale() (float32, float32)

GetContentScale function retrieves the content scale for the specified window. The content scale is the ratio between the current DPI and the platform's default DPI. If you scale all pixel dimensions by this scale then your content should appear at an appropriate size. This is especially important for text and any UI elements.

This function may only be called from the main thread.

func (*Window) GetCursorPos 

func (w *Window) GetCursorPos() (x, y float64, err error)

GetCursorPos returns the last reported position of the cursor.

If the cursor is disabled (with CursorDisabled) then the cursor position is unbounded and limited only by the minimum and maximum values of a double.

The coordinate can be converted to their integer equivalents with the floor function. Casting directly to an integer type works for positive coordinates, but fails for negative ones.

func (*Window) GetFrameSize added in v2.7.0 

func (w *Window) GetFrameSize() (left, top, right, bottom int, err error)

GetFrameSize 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.

func (*Window) GetFramebufferSize added in v2.7.0 

func (w *Window) GetFramebufferSize() (width, height int, err error)

GetFramebufferSize retrieves the size, in pixels, of the framebuffer of the specified window.

func (*Window) GetGLXContext added in v2.7.0 

func (w *Window) GetGLXContext() (C.GLXContext, error)

GetGLXContext returns the GLXContext of the window.

func (*Window) GetGLXWindow added in v2.7.0 

func (w *Window) GetGLXWindow() (C.GLXWindow, error)

GetGLXWindow returns the GLXWindow of the window.

func (*Window) GetInputMode 

func (w *Window) GetInputMode(mode InputMode) (int, error)

GetInputMode returns the value of an input option of the window.

func (*Window) GetKey 

func (w *Window) GetKey(key Key) (Action, error)

GetKey returns the last reported state of a keyboard key. The returned state is one of Press or Release. The higher-level state Repeat is only reported to the key callback.

If the StickyKeys input mode is enabled, this function returns Press the first time you call this function after a key has been pressed, even if the key has already been released.

The key functions deal with physical keys, with key tokens named after their use on the standard US keyboard layout. If you want to input text, use the Unicode character callback instead.

func (*Window) GetMonitor 

func (w *Window) GetMonitor() (*Monitor, error)

GetMonitor returns the handle of the monitor that the window is in fullscreen on.

Returns nil if the window is in windowed mode.

func (*Window) GetMouseButton 

func (w *Window) GetMouseButton(button MouseButton) (Action, error)

GetMouseButton returns the last state reported for the specified mouse button.

If the StickyMouseButtons input mode is enabled, this function returns Press the first time you call this function after a mouse button has been pressed, even if the mouse button has already been released.

func (*Window) GetOpacity added in v2.7.0 

func (w *Window) GetOpacity() float32

GetOpacity function returns the opacity of the window, including any decorations.

The opacity (or alpha) value is a positive finite number between zero and one, where zero is fully transparent and one is fully opaque. If the system does not support whole window transparency, this function always returns one.

The initial opacity value for newly created windows is one.

This function may only be called from the main thread.

func (*Window) GetPos 

func (w *Window) GetPos() (x, y int, err error)

GetPos returns the position, in screen coordinates, of the upper-left corner of the client area of the window.

func (*Window) GetSize 

func (w *Window) GetSize() (width, height int, err error)

GetSize returns the size, in screen coordinates, of the client area of the specified window.

func (*Window) GetUserPointer added in v2.7.0 

func (w *Window) GetUserPointer() (unsafe.Pointer, error)

GetUserPointer returns the current value of the user-defined pointer of the window. The initial value is nil.

func (*Window) GetX11Window added in v2.7.0 

func (w *Window) GetX11Window() (C.Window, error)

GetX11Window returns the Window of the window.

func (*Window) Handle added in v2.7.0 

func (w *Window) Handle() unsafe.Pointer

Handle returns a *C.GLFWwindow reference (i.e. the GLFW window itself). This can be used for passing the GLFW window handle to external libraries like vulkan-go.

func (*Window) Hide added in v2.2.0 

func (w *Window) Hide() error

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

This function may only be called from the main thread.

func (*Window) Iconify 

func (w *Window) Iconify() error

Iconify iconifies/minimizes the 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.

This function may only be called from the main thread.

func (*Window) MakeContextCurrent 

func (w *Window) MakeContextCurrent() error

MakeContextCurrent makes the context of the window current. Originally GLFW 3 passes a null pointer to detach the context. But since we're using receivers, DetachCurrentContext should be used instead.

func (*Window) Maximize 

func (w *Window) Maximize() error

Maximize maximizes the specified window if it was previously not maximized. If the window is already maximized, this function does nothing.

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

func (*Window) RequestAttention added in v2.7.0 

func (w *Window) RequestAttention() error

RequestAttention function requests user attention to the specified window. On platforms where this is not supported, attention is requested to the application as a whole.

Once the user has given attention, usually by focusing the window or application, the system will end the request automatically.

This function must only be called from the main thread.

func (*Window) Restore 

func (w *Window) Restore() error

Restore restores the 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.

This function may only be called from the main thread.

func (*Window) SetAspectRatio added in v2.3.0 

func (w *Window) SetAspectRatio(numer, denom int) error

SetAspectRatio sets the required aspect ratio of the client area of the specified window. If the window is full screen or not resizable, this function does nothing.

The aspect ratio is specified as a numerator and a denominator and both values must be greater than zero. For example, the common 16:9 aspect ratio is specified as 16 and 9, respectively.

If the numerator and denominator is set to glfw.DontCare then the aspect ratio limit is disabled.

The aspect ratio is applied immediately and may cause the window to be resized.

func (*Window) SetAttrib 

func (w *Window) SetAttrib(attrib Hint, value int) error

SetAttrib function sets the value of an attribute of the specified window.

The supported attributes are Decorated, Resizeable, Floating and AutoIconify.

Some of these attributes are ignored for full screen windows. The new value will take effect if the window is later made windowed.

Some of these attributes are ignored for windowed mode windows. The new value will take effect if the window is later made full screen.

This function may only be called from the main thread.

func (*Window) SetCharCallback added in v2.7.0 

func (w *Window) SetCharCallback(cbfun CharCallback) (previous CharCallback, err error)

SetCharCallback sets the character callback which is called when a Unicode character is input.

The character callback is intended for Unicode text input. As it deals with characters, it is keyboard layout dependent, whereas the key callback is not. Characters do not map 1:1 to physical keys, as a key may produce zero, one or more characters. If you want to know whether a specific physical key was pressed or released, see the key callback instead.

The character callback behaves as system text input normally does and will not be called if modifier keys are held down that would prevent normal text input on that platform, for example a Super (Command) key on OS X or Alt key on Windows. There is a character with modifiers callback that receives these events.

func (*Window) SetCharModsCallback deprecated 

func (w *Window) SetCharModsCallback(cbfun CharModsCallback) (previous CharModsCallback, err error)

SetCharModsCallback sets the character with modifiers callback which is called when a Unicode character is input regardless of what modifier keys are used.

Deprecated: Scheduled for removal in version 4.0.

The character with modifiers callback is intended for implementing custom Unicode character input. For regular Unicode text input, see the character callback. Like the character callback, the character with modifiers callback deals with characters and is keyboard layout dependent. Characters do not map 1:1 to physical keys, as a key may produce zero, one or more characters. If you want to know whether a specific physical key was pressed or released, see the key callback instead.

func (*Window) SetClipboardString added in v2.7.0 

func (w *Window) SetClipboardString(str string) error

SetClipboardString sets the system clipboard to the specified UTF-8 encoded string.

Ownership to the Window is no longer necessary, see glfw.SetClipboardString(string)

This function may only be called from the main thread.

func (*Window) SetCloseCallback added in v2.2.0 

func (w *Window) SetCloseCallback(cbfun CloseCallback) (previous CloseCallback, err error)

SetCloseCallback sets the close callback of the 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 SetShouldClose.

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

func (*Window) SetContentScaleCallback added in v2.7.0 

func (w *Window) SetContentScaleCallback(cbfun ContentScaleCallback) (ContentScaleCallback, error)

SetContentScaleCallback function sets the window content scale callback of the specified window, which is called when the content scale of the specified window changes.

This function must only be called from the main thread.

func (*Window) SetCursor added in v2.1.0 

func (w *Window) SetCursor(c *Cursor) error

SetCursor sets the cursor image to be used when the cursor is over the client area of the specified window. The set cursor will only be visible when the cursor mode of the window is CursorNormal.

On some platforms, the set cursor may not be visible unless the window also has input focus.

func (*Window) SetCursorEnterCallback added in v2.7.0 

func (w *Window) SetCursorEnterCallback(cbfun CursorEnterCallback) (previous CursorEnterCallback, err error)

SetCursorEnterCallback the cursor boundary crossing callback which is called when the cursor enters or leaves the client area of the window.

func (*Window) SetCursorPos added in v2.6.0 

func (w *Window) SetCursorPos(xpos, ypos float64) error

SetCursorPos sets the position of the cursor. The specified window must be focused. If the window does not have focus when this function is called, it fails silently.

If the cursor is disabled (with CursorDisabled) then the cursor position is unbounded and limited only by the minimum and maximum values of a double.

func (*Window) SetCursorPosCallback added in v2.7.0 

func (w *Window) SetCursorPosCallback(cbfun CursorPosCallback) (previous CursorPosCallback, err error)

SetCursorPosCallback sets the cursor position callback which is called when the cursor is moved. The callback is provided with the position relative to the upper-left corner of the client area of the window.

func (*Window) SetDropCallback added in v2.5.0 

func (w *Window) SetDropCallback(cbfun DropCallback) (previous DropCallback, err error)

SetDropCallback sets the drop callback which is called when an object is dropped over the window.

func (*Window) SetFocusCallback added in v2.7.0 

func (w *Window) SetFocusCallback(cbfun FocusCallback) (previous FocusCallback, err error)

SetFocusCallback sets the focus callback of the 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 SetKeyCallback and SetMouseButtonCallback.

func (*Window) SetFramebufferSizeCallback 

func (w *Window) SetFramebufferSizeCallback(cbfun FramebufferSizeCallback) (previous FramebufferSizeCallback, err error)

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

func (*Window) SetIcon 

func (w *Window) SetIcon(images []image.Image) error

SetIcon sets the icon of the specified window. If passed an array of candidate images, those of or closest to the sizes desired by the system are selected. If no images are specified, the window reverts to its default icon.

The image is ideally provided in the form of *image.NRGBA. The pixels are 32-bit, little-endian, non-premultiplied RGBA, i.e. eight bits per channel with the red channel first. They are arranged canonically as packed sequential rows, starting from the top-left corner. If the image type is not *image.NRGBA, it will be converted to it.

The desired image sizes varies depending on platform and system settings. The selected images will be rescaled as needed. Good sizes include 16x16, 32x32 and 48x48.

func (*Window) SetIconifyCallback added in v2.7.0 

func (w *Window) SetIconifyCallback(cbfun IconifyCallback) (previous IconifyCallback, err error)

SetIconifyCallback sets the iconification callback of the window, which is called when the window is iconified or restored.

func (*Window) SetInputMode 

func (w *Window) SetInputMode(mode InputMode, value int) error

SetInputMode sets an input option for the window.

func (*Window) SetKeyCallback added in v2.7.0 

func (w *Window) SetKeyCallback(cbfun KeyCallback) (previous KeyCallback, err error)

SetKeyCallback sets the key callback which is called when a key is pressed, repeated or released.

The key functions deal with physical keys, with layout independent key tokens named after their values in the standard US keyboard layout. If you want to input text, use the SetCharCallback instead.

When a window loses focus, it will generate synthetic key release events for all pressed keys. You can tell these events from user-generated events by the fact that the synthetic ones are generated after the window has lost focus, i.e. Focused will be false and the focus callback will have already been called.

func (*Window) SetMaximizeCallback added in v2.7.0 

func (w *Window) SetMaximizeCallback(cbfun MaximizeCallback) MaximizeCallback

SetMaximizeCallback sets the maximization callback of the specified window, which is called when the window is maximized or restored.

This function must only be called from the main thread.

func (*Window) SetMonitor 

func (w *Window) SetMonitor(monitor *Monitor, xpos, ypos, width, height, refreshRate int) error

SetMonitor sets the monitor that the window uses for full screen mode or, if the monitor is NULL, makes it windowed mode.

When setting a monitor, this function updates the width, height and refresh rate of the desired video mode and switches to the video mode closest to it. The window position is ignored when setting a monitor.

When the monitor is NULL, the position, width and height are used to place the window client area. The refresh rate is ignored when no monitor is specified. If you only wish to update the resolution of a full screen window or the size of a windowed mode window, see window.SetSize.

When a window transitions from full screen to windowed mode, this function restores any previous window settings such as whether it is decorated, floating, resizable, has size or aspect ratio limits, etc..

func (*Window) SetMouseButtonCallback added in v2.7.0 

func (w *Window) SetMouseButtonCallback(cbfun MouseButtonCallback) (previous MouseButtonCallback, err error)

SetMouseButtonCallback sets the mouse button callback which is called when a mouse button is pressed or released.

When a window loses focus, it will generate synthetic mouse button release events for all pressed mouse buttons. You can tell these events from user-generated events by the fact that the synthetic ones are generated after the window has lost focus, i.e. Focused will be false and the focus callback will have already been called.

func (*Window) SetOpacity added in v2.7.0 

func (w *Window) SetOpacity(opacity float32)

SetOpacity function sets the opacity of the window, including any decorations. The opacity (or alpha) value is a positive finite number between zero and one, where zero is fully transparent and one is fully opaque.

The initial opacity value for newly created windows is one.

A window created with framebuffer transparency may not use whole window transparency. The results of doing this are undefined.

This function may only be called from the main thread.

func (*Window) SetPos 

func (w *Window) SetPos(xpos, ypos int) error

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

If it 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 Hint and Visible), set its position and then show it.

It is very rarely a good idea to move an already visible window, as it will confuse and annoy the user.

The window manager may put limits on what positions are allowed.

This function may only be called from the main thread.

func (*Window) SetPosCallback added in v2.7.0 

func (w *Window) SetPosCallback(cbfun PosCallback) (previous PosCallback, err error)

SetPosCallback sets the position callback of the 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.

func (*Window) SetRefreshCallback added in v2.7.0 

func (w *Window) SetRefreshCallback(cbfun RefreshCallback) (previous RefreshCallback, err error)

SetRefreshCallback sets the refresh callback of the 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.

func (*Window) SetScrollCallback 

func (w *Window) SetScrollCallback(cbfun ScrollCallback) (previous ScrollCallback, err error)

SetScrollCallback sets the scroll callback which is called when a scrolling device is used, such as a mouse wheel or scrolling area of a touchpad.

func (*Window) SetShouldClose added in v2.2.0 

func (w *Window) SetShouldClose(value bool) error

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

func (*Window) SetSize 

func (w *Window) SetSize(width, height int) error

SetSize sets the size, in screen coordinates, of the client area of the 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 window sizes are allowed.

This function may only be called from the main thread.

func (*Window) SetSizeCallback 

func (w *Window) SetSizeCallback(cbfun SizeCallback) (previous SizeCallback, err error)

SetSizeCallback sets the size callback of the 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.

func (*Window) SetSizeLimits added in v2.1.0 

func (w *Window) SetSizeLimits(minw, minh, maxw, maxh int) error

SetSizeLimits sets the size limits of the client area of the specified window. If the window is full screen or not resizable, this function does nothing.

The size limits are applied immediately and may cause the window to be resized.

func (*Window) SetTitle 

func (w *Window) SetTitle(title string) error

SetTitle sets the window title, encoded as UTF-8, of the window.

This function may only be called from the main thread.

func (*Window) SetUserPointer added in v2.7.0 

func (w *Window) SetUserPointer(pointer unsafe.Pointer) error

SetUserPointer sets the user-defined pointer of the window. The current value is retained until the window is destroyed. The initial value is nil.

func (*Window) ShouldClose 

func (w *Window) ShouldClose() (bool, error)

ShouldClose reports the value of the close flag of the specified window.

func (*Window) Show 

func (w *Window) Show() error

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

This function may only be called from the main thread.

func (*Window) SwapBuffers 

func (w *Window) SwapBuffers() error

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

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