// DrawAll() draws the Screen contents
func (s *Screen) DrawAll() {
gl.ClearColor(s.backgroundColor.R, s.backgroundColor.G, s.backgroundColor.B, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT)
if s.drawContentsCallback != nil {
s.drawContentsCallback()
}
s.drawWidgets()
s.window.SwapBuffers()
}
func (c *canvas) Clear(color gxui.Color) {
c.appendOp("Clear", func(ctx *context, dss *drawStateStack) {
gl.ClearColor(
color.R,
color.G,
color.B,
color.A,
)
gl.Clear(gl.COLOR_BUFFER_BIT)
})
}
func newViewport(driver *driver, width, height int, title string, fullscreen bool) *viewport {
v := &viewport{
fullscreen: fullscreen,
scaling: 1,
title: title,
}
glfw.DefaultWindowHints()
glfw.WindowHint(glfw.Samples, 4)
var monitor *glfw.Monitor
if fullscreen {
monitor = glfw.GetPrimaryMonitor()
if width == 0 || height == 0 {
vm := monitor.GetVideoMode()
width, height = vm.Width, vm.Height
}
}
wnd, err := glfw.CreateWindow(width, height, v.title, monitor, nil)
if err != nil {
panic(err)
}
width, height = wnd.GetSize() // At this time, width and height serve as a "hint" for glfw.CreateWindow, so get actual values from window.
wnd.MakeContextCurrent()
v.context = newContext()
cursorPoint := func(x, y float64) math.Point {
// HACK: xpos is off by 1 and ypos is off by 3 on OSX.
// Compensate until real fix is found.
x -= 1.0
y -= 3.0
return math.Point{X: int(x), Y: int(y)}.ScaleS(1 / v.scaling)
}
wnd.SetCloseCallback(func(*glfw.Window) {
v.Close()
})
wnd.SetPosCallback(func(w *glfw.Window, x, y int) {
v.Lock()
v.position = math.NewPoint(x, y)
v.Unlock()
})
wnd.SetSizeCallback(func(_ *glfw.Window, w, h int) {
v.Lock()
v.sizeDipsUnscaled = math.Size{W: w, H: h}
v.sizeDips = v.sizeDipsUnscaled.ScaleS(1 / v.scaling)
v.Unlock()
v.onResize.Fire()
})
wnd.SetFramebufferSizeCallback(func(_ *glfw.Window, w, h int) {
v.Lock()
v.sizePixels = math.Size{W: w, H: h}
v.Unlock()
gl.Viewport(0, 0, w, h)
gl.ClearColor(kClearColorR, kClearColorG, kClearColorB, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
})
wnd.SetCursorPosCallback(func(w *glfw.Window, x, y float64) {
p := cursorPoint(w.GetCursorPos())
v.Lock()
if v.pendingMouseMoveEvent == nil {
v.pendingMouseMoveEvent = &gxui.MouseEvent{}
driver.Call(func() {
v.Lock()
ev := *v.pendingMouseMoveEvent
v.pendingMouseMoveEvent = nil
v.Unlock()
v.onMouseMove.Fire(ev)
})
}
v.pendingMouseMoveEvent.Point = p
v.pendingMouseMoveEvent.State = getMouseState(w)
v.Unlock()
})
wnd.SetCursorEnterCallback(func(w *glfw.Window, entered bool) {
p := cursorPoint(w.GetCursorPos())
ev := gxui.MouseEvent{
Point: p,
}
ev.State = getMouseState(w)
if entered {
v.onMouseEnter.Fire(ev)
} else {
v.onMouseExit.Fire(ev)
}
})
wnd.SetScrollCallback(func(w *glfw.Window, xoff, yoff float64) {
p := cursorPoint(w.GetCursorPos())
v.Lock()
if v.pendingMouseScrollEvent == nil {
v.pendingMouseScrollEvent = &gxui.MouseEvent{}
driver.Call(func() {
v.Lock()
ev := *v.pendingMouseScrollEvent
v.pendingMouseScrollEvent = nil
ev.ScrollX, ev.ScrollY = int(v.scrollAccumX), int(v.scrollAccumY)
if ev.ScrollX != 0 || ev.ScrollY != 0 {
v.scrollAccumX -= float64(ev.ScrollX)
v.scrollAccumY -= float64(ev.ScrollY)
v.Unlock()
v.onMouseScroll.Fire(ev)
} else {
v.Unlock()
}
})
}
v.pendingMouseScrollEvent.Point = p
v.scrollAccumX += xoff * platform.ScrollSpeed
v.scrollAccumY += yoff * platform.ScrollSpeed
v.pendingMouseScrollEvent.State = getMouseState(w)
v.Unlock()
})
wnd.SetMouseButtonCallback(func(w *glfw.Window, button glfw.MouseButton, action glfw.Action, mod glfw.ModifierKey) {
p := cursorPoint(w.GetCursorPos())
ev := gxui.MouseEvent{
Point: p,
Modifier: translateKeyboardModifier(mod),
}
ev.Button = translateMouseButton(button)
ev.State = getMouseState(w)
if action == glfw.Press {
v.onMouseDown.Fire(ev)
} else {
v.onMouseUp.Fire(ev)
}
})
wnd.SetKeyCallback(func(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
ev := gxui.KeyboardEvent{
Key: translateKeyboardKey(key),
Modifier: translateKeyboardModifier(mods),
}
switch action {
case glfw.Press:
v.onKeyDown.Fire(ev)
case glfw.Release:
v.onKeyUp.Fire(ev)
case glfw.Repeat:
v.onKeyRepeat.Fire(ev)
}
})
wnd.SetCharModsCallback(func(w *glfw.Window, char rune, mods glfw.ModifierKey) {
if !unicode.IsControl(char) &&
!unicode.IsGraphic(char) &&
!unicode.IsLetter(char) &&
!unicode.IsMark(char) &&
!unicode.IsNumber(char) &&
!unicode.IsPunct(char) &&
!unicode.IsSpace(char) &&
!unicode.IsSymbol(char) {
return // Weird unicode character. Ignore
}
ev := gxui.KeyStrokeEvent{
Character: char,
Modifier: translateKeyboardModifier(mods),
}
v.onKeyStroke.Fire(ev)
})
wnd.SetRefreshCallback(func(w *glfw.Window) {
if v.canvas != nil {
v.render()
}
})
fw, fh := wnd.GetFramebufferSize()
posX, posY := wnd.GetPos()
// Pre-multiplied alpha blending
gl.BlendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.BLEND)
gl.Enable(gl.SCISSOR_TEST)
gl.Viewport(0, 0, fw, fh)
gl.Scissor(0, 0, int32(fw), int32(fh))
gl.ClearColor(kClearColorR, kClearColorG, kClearColorB, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT)
wnd.SwapBuffers()
v.window = wnd
v.driver = driver
v.onClose = driver.createAppEvent(func() {})
v.onResize = driver.createAppEvent(func() {})
v.onMouseMove = gxui.CreateEvent(func(gxui.MouseEvent) {})
v.onMouseEnter = driver.createAppEvent(func(gxui.MouseEvent) {})
v.onMouseExit = driver.createAppEvent(func(gxui.MouseEvent) {})
v.onMouseDown = driver.createAppEvent(func(gxui.MouseEvent) {})
v.onMouseUp = driver.createAppEvent(func(gxui.MouseEvent) {})
v.onMouseScroll = gxui.CreateEvent(func(gxui.MouseEvent) {})
v.onKeyDown = driver.createAppEvent(func(gxui.KeyboardEvent) {})
v.onKeyUp = driver.createAppEvent(func(gxui.KeyboardEvent) {})
v.onKeyRepeat = driver.createAppEvent(func(gxui.KeyboardEvent) {})
v.onKeyStroke = driver.createAppEvent(func(gxui.KeyStrokeEvent) {})
v.onDestroy = driver.createDriverEvent(func() {})
v.sizeDipsUnscaled = math.Size{W: width, H: height}
v.sizeDips = v.sizeDipsUnscaled.ScaleS(1 / v.scaling)
v.sizePixels = math.Size{W: fw, H: fh}
v.position = math.Point{X: posX, Y: posY}
return v
}
func main() {
err := glfw.Init(gl.ContextWatcher)
if err != nil {
panic(err)
}
defer glfw.Terminate()
glfw.WindowHint(glfw.StencilBits, 1)
glfw.WindowHint(glfw.Samples, 4)
window, err := glfw.CreateWindow(1000*0.6, 600*0.6, "NanoVGo", nil, nil)
if err != nil {
panic(err)
}
window.SetKeyCallback(key)
window.MakeContextCurrent()
ctx, err := nanovgo.NewContext(0)
defer ctx.Delete()
if err != nil {
panic(err)
}
demoData := LoadDemo(ctx)
glfw.SwapInterval(0)
fps := perfgraph.NewPerfGraph("Frame Time", "sans")
for !window.ShouldClose() {
t, _ := fps.UpdateGraph()
fbWidth, fbHeight := window.GetFramebufferSize()
winWidth, winHeight := window.GetSize()
mx, my := window.GetCursorPos()
pixelRatio := float32(fbWidth) / float32(winWidth)
gl.Viewport(0, 0, fbWidth, fbHeight)
if premult {
gl.ClearColor(0, 0, 0, 0)
} else {
gl.ClearColor(0.3, 0.3, 0.32, 1.0)
}
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT)
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.CULL_FACE)
gl.Disable(gl.DEPTH_TEST)
ctx.BeginFrame(winWidth, winHeight, pixelRatio)
demo.RenderDemo(ctx, float32(mx), float32(my), float32(winWidth), float32(winHeight), t, blowup, demoData)
fps.RenderGraph(ctx, 5, 5)
ctx.EndFrame()
gl.Enable(gl.DEPTH_TEST)
window.SwapBuffers()
glfw.PollEvents()
}
demoData.FreeData(ctx)
}
func main() {
if err := glfw.Init(gl.ContextWatcher); err != nil {
panic(err)
}
defer glfw.Terminate()
window, err := glfw.CreateWindow(400, 400, "", nil, nil)
if err != nil {
panic(err)
}
window.MakeContextCurrent()
glfw.SwapInterval(1) // Vsync.
framebufferSizeCallback := func(w *glfw.Window, framebufferSize0, framebufferSize1 int) {
gl.Viewport(0, 0, framebufferSize0, framebufferSize1)
var windowSize [2]int
windowSize[0], windowSize[1] = w.GetSize()
_, _ = windowSize[0], windowSize[1]
/*inputEvent := InputEvent{
Pointer: windowPointer,
EventTypes: map[EventType]struct{}{AXIS_EVENT: struct{}{}},
InputId: 0,
Buttons: nil,
Sliders: nil,
Axes: []float64{float64(windowSize[0]), float64(windowSize[1])},
}
inputEventQueue = events.EnqueueInputEvent(inputEventQueue, inputEvent)*/
}
{
var framebufferSize [2]int
framebufferSize[0], framebufferSize[1] = window.GetFramebufferSize()
framebufferSizeCallback(window, framebufferSize[0], framebufferSize[1])
}
window.SetFramebufferSizeCallback(framebufferSizeCallback)
var inputEventQueue []events.InputEvent
mousePointer = &events.Pointer{VirtualCategory: events.POINTING}
keyboardPointer = &events.Pointer{VirtualCategory: events.TYPING}
window.SetMouseMovementCallback(func(w *glfw.Window, xpos, ypos, xdelta, ydelta float64) {
inputEvent := events.InputEvent{
Pointer: mousePointer,
EventTypes: map[events.EventType]struct{}{events.SLIDER_EVENT: {}},
InputId: 0,
Buttons: nil,
Sliders: []float64{xdelta, ydelta},
}
if w.GetInputMode(glfw.CursorMode) != glfw.CursorDisabled {
inputEvent.EventTypes[events.AXIS_EVENT] = struct{}{}
inputEvent.Axes = []float64{xpos, ypos}
}
inputEventQueue = events.EnqueueInputEvent(inputEventQueue, inputEvent)
})
window.SetScrollCallback(func(w *glfw.Window, xoff float64, yoff float64) {
inputEvent := events.InputEvent{
Pointer: mousePointer,
EventTypes: map[events.EventType]struct{}{events.SLIDER_EVENT: {}},
InputId: 2,
Buttons: nil,
Sliders: []float64{yoff, xoff},
Axes: nil,
}
inputEventQueue = events.EnqueueInputEvent(inputEventQueue, inputEvent)
})
window.SetMouseButtonCallback(func(w *glfw.Window, button glfw.MouseButton, action glfw.Action, mods glfw.ModifierKey) {
inputEvent := events.InputEvent{
Pointer: mousePointer,
EventTypes: map[events.EventType]struct{}{events.BUTTON_EVENT: {}},
InputId: uint16(button),
Buttons: []bool{action != glfw.Release},
Sliders: nil,
Axes: nil,
ModifierKey: uint8(mods),
}
inputEventQueue = events.EnqueueInputEvent(inputEventQueue, inputEvent)
})
window.SetKeyCallback(func(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
inputEvent := events.InputEvent{
Pointer: keyboardPointer,
EventTypes: map[events.EventType]struct{}{events.BUTTON_EVENT: {}},
InputId: uint16(key),
Buttons: []bool{action != glfw.Release},
Sliders: nil,
Axes: nil,
ModifierKey: uint8(mods),
}
inputEventQueue = events.EnqueueInputEvent(inputEventQueue, inputEvent)
// HACK.
switch {
case key == glfw.Key1 && action == glfw.Press:
window.SetInputMode(glfw.CursorMode, glfw.CursorNormal)
case key == glfw.Key2 && action == glfw.Press:
window.SetInputMode(glfw.CursorMode, glfw.CursorHidden)
case key == glfw.Key3 && action == glfw.Press:
window.SetInputMode(glfw.CursorMode, glfw.CursorDisabled)
}
})
window.SetCharCallback(func(w *glfw.Window, char rune) {
inputEvent := events.InputEvent{
Pointer: keyboardPointer,
EventTypes: map[events.EventType]struct{}{events.CHARACTER_EVENT: {}},
InputId: uint16(char),
Buttons: nil,
Sliders: nil,
Axes: nil,
}
inputEventQueue = events.EnqueueInputEvent(inputEventQueue, inputEvent)
})
gl.ClearColor(0.85, 0.85, 0.85, 1)
for !window.ShouldClose() {
glfw.PollEvents()
// Process Input.
inputEventQueue = processInputEventQueue(inputEventQueue)
gl.Clear(gl.COLOR_BUFFER_BIT)
mousePointer.Render()
window.SwapBuffers()
runtime.Gosched()
}
}
func NewScreen(width, height int, caption string, resizable, fullScreen bool) *Screen {
screen := &Screen{
//cursor: glfw.CursorNormal,
caption: caption,
}
if runtime.GOARCH == "js" {
glfw.WindowHint(glfw.Hint(0x00021101), 1) // enable stencil for nanovgo
}
glfw.WindowHint(glfw.Samples, 4)
//glfw.WindowHint(glfw.RedBits, 8)
//glfw.WindowHint(glfw.GreenBits, 8)
//glfw.WindowHint(glfw.BlueBits, 8)
glfw.WindowHint(glfw.AlphaBits, 8)
//glfw.WindowHint(glfw.StencilBits, 8)
//glfw.WindowHint(glfw.DepthBits, 8)
//glfw.WindowHint(glfw.Visible, 0)
if resizable {
//glfw.WindowHint(glfw.Resizable, 1)
} else {
//glfw.WindowHint(glfw.Resizable, 0)
}
var err error
if fullScreen {
monitor := glfw.GetPrimaryMonitor()
mode := monitor.GetVideoMode()
screen.window, err = glfw.CreateWindow(mode.Width, mode.Height, caption, monitor, nil)
} else {
screen.window, err = glfw.CreateWindow(width, height, caption, nil, nil)
}
if err != nil {
panic(err)
}
screen.window.MakeContextCurrent()
gl.Viewport(0, 0, screen.fbW, screen.fbH)
gl.ClearColor(0, 0, 0, 1)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT)
glfw.SwapInterval(0)
screen.window.SwapBuffers()
/* Poll for events once before starting a potentially
lengthy loading process. This is needed to be
classified as "interactive" by other software such
as iTerm2 */
if runtime.GOOS == "darwin" {
glfw.PollEvents()
}
screen.window.SetCursorPosCallback(func(w *glfw.Window, xpos, ypos float64) {
if screen, ok := nanoguiScreens[w]; ok {
screen.cursorPositionCallbackEvent(xpos, ypos)
}
})
screen.window.SetMouseButtonCallback(func(w *glfw.Window, button glfw.MouseButton, action glfw.Action, mods glfw.ModifierKey) {
if screen, ok := nanoguiScreens[w]; ok {
screen.mouseButtonCallbackEvent(button, action, mods)
}
})
screen.window.SetKeyCallback(func(w *glfw.Window, key glfw.Key, scanCode int, action glfw.Action, mods glfw.ModifierKey) {
if screen, ok := nanoguiScreens[w]; ok {
screen.keyCallbackEvent(key, scanCode, action, mods)
}
})
screen.window.SetCharCallback(func(w *glfw.Window, char rune) {
if screen, ok := nanoguiScreens[w]; ok {
screen.charCallbackEvent(char)
}
})
screen.window.SetPreeditCallback(func(w *glfw.Window, text []rune, blocks []int, focusedBlock int) {
if screen, ok := nanoguiScreens[w]; ok {
screen.preeditCallbackEvent(text, blocks, focusedBlock)
}
})
screen.window.SetIMEStatusCallback(func(w *glfw.Window) {
if screen, ok := nanoguiScreens[w]; ok {
screen.imeStatusCallbackEvent()
}
})
screen.window.SetDropCallback(func(w *glfw.Window, names []string) {
if screen, ok := nanoguiScreens[w]; ok {
screen.dropCallbackEvent(names)
}
})
screen.window.SetScrollCallback(func(w *glfw.Window, xoff float64, yoff float64) {
if screen, ok := nanoguiScreens[w]; ok {
screen.scrollCallbackEvent(float32(xoff), float32(yoff))
}
})
screen.window.SetFramebufferSizeCallback(func(w *glfw.Window, width int, height int) {
if screen, ok := nanoguiScreens[w]; ok {
screen.resizeCallbackEvent(width, height)
}
})
screen.Initialize(screen.window, true)
InitWidget(screen, nil)
return screen
}