func main() {
if len(os.Args) != 2 {
fmt.Printf("Usage: %s imagefile\n", os.Args[0])
return
}
f, err := os.Open(os.Args[1])
if err != nil {
fmt.Println(err)
return
}
defer f.Close()
m, _, err := image.Decode(f)
if err != nil {
fmt.Println(err)
return
}
w, err := x11.NewWindow()
if err != nil {
fmt.Println(err)
return
}
draw.Draw(w.Screen(), w.Screen().Bounds(), m, image.ZP, draw.Src)
w.FlushImage()
for e := range w.EventChan() {
switch e := e.(type) {
case ui.KeyEvent:
if e.Key == ' ' {
return
}
}
}
}
func openDisplay() (window ui.Window) {
window, err := x11.NewWindow()
if err != nil {
panic(fmt.Sprintf("%s", err))
}
return window
}
func main() {
Display = make(chan []Point)
go morph(Display)
pic := makePicture(400, 600, 20)
v := <-Display
pic.Plot(v)
w, err := x11.NewWindow()
if err != nil {
fmt.Println(err)
return
}
for {
draw.Draw(w.Screen(), w.Screen().Bounds(), pic, image.ZP, draw.Src)
w.FlushImage()
time.Sleep(5 * time.Millisecond)
/*
next_picture:
for e := range w.EventChan() {
switch e := e.(type) {
case ui.KeyEvent:
if e.Key == ' ' {
break next_picture
}
}
}
*/
v := <-Display
pic.Clear()
// pic := makePicture(400, 600, 20)
pic.Plot(v)
}
}
func main() {
tc := runtime.NumCPU()
runtime.GOMAXPROCS(tc)
// Initiate a new x11 screen to print images onto
win, err := x11.NewWindow()
if err != nil {
log.Fatalln(err)
}
defer win.Close()
screen := win.Screen()
_, ok := screen.(*image.RGBA)
if !ok {
log.Fatalln("screen isn't an RGBA image.")
}
//Create lookup table for every combination of 16 black/white pixels
var i, j uint
for i = 0; i < 65536; i++ {
for j = 0; j < 16; j++ {
if i&(1<<j) > 0 {
bw[i][j*4+0] = 0xFF
bw[i][j*4+1] = 0xFF
bw[i][j*4+2] = 0xFF
}
}
}
// Start fps counter in a new goroutin
go fps()
// Start goroutines
for i := 0; i < tc; i++ {
go createNoise(win, screen)
}
createNoise(win, screen)
}
func do_worldgen2() {
win, err := x11.NewWindow()
Panic(err)
defer win.Close()
eventchan := win.EventChan()
scr := win.Screen()
w := worldgen2.NewWorld(17, 5)
translate := noise.NewTranslate(float64(scr.Bounds().Max.X), float64(scr.Bounds().Max.Y))
translate.Zoom(0, 0, 1, 1)
drawworld2(translate, w, scr)
selecting := false
selectx := uint32(0)
selecty := uint32(0)
stop := false
for !stop {
win.FlushImage()
tlevent := <-eventchan
switch event := tlevent.(type) {
case nil:
fmt.Printf("Window closed\n")
stop = true
//case draw.KeyEvent:
case ui.MouseEvent:
if event.Buttons&1 == 1 {
if !selecting {
selecting = true
selectx = uint32(event.Loc.X)
selecty = uint32(event.Loc.Y)
} else {
selecting = false
translate.ZoomBox(float64(selectx), float64(selecty), float64(event.Loc.X), float64(event.Loc.Y))
drawworld2(translate, w, scr)
}
} else {
posx, posy := translate.Into(float64(event.Loc.X), float64(event.Loc.Y))
per := w.GetHeight_Island(posx, posy)
fmt.Printf("%f, %f = %f\n", posx, posy, per)
}
case ui.ConfigEvent:
fmt.Printf("CONFIG\n")
scr = win.Screen()
translate.Resize(float64(scr.Bounds().Max.X), float64(scr.Bounds().Max.Y))
drawworld2(translate, w, scr)
case ui.ErrEvent:
fmt.Printf("ERR\n")
Panic(event.Err)
}
}
}
func (me *Canvas) ensureHasWindow() error {
if me.window != nil {
return nil
}
window, err := x11.NewWindow()
if err != nil {
return err
}
me.window = window
return nil
}
func main() {
win, err := x11.NewWindow()
if err != nil {
log.Fatalf("Error: %v\n", err)
}
defer win.Close()
for ev := range win.EventChan() {
switch e := ev.(type) {
case ui.ErrEvent:
log.Fatalf("Error: %v\n", e.Err)
}
}
}
func main() {
ps[0].plot = linesPlot()
ps[1].plot = histPlot()
var err error
font, err = vg.MakeFont("Times-Roman", vg.Points(12))
if err != nil {
panic(err)
}
win, err := x11.NewWindow()
if err != nil {
panic(err)
}
drawPlots(win.Screen())
win.FlushImage()
if cpuProfile != "" {
f, err := os.Create(cpuProfile)
if err != nil {
panic(err)
}
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
if memProfile != "" {
f, err := os.Create(memProfile)
if err != nil {
panic(err)
}
pprof.WriteHeapProfile(f)
f.Close()
}
events := win.EventChan()
for ev := range events {
if m, ok := ev.(ui.MouseEvent); ok && m.Buttons == 1 {
winHeight := 600 // hard-coded for ui/x11…
p, x, y := dataCoord(m.Loc.X, winHeight-m.Loc.Y)
if p >= 0 {
str := fmt.Sprintf("plot: %d, coord: %g, %g\n", p, x, y)
crosshair(win.Screen(), m.Loc.X, winHeight-m.Loc.Y, str)
win.FlushImage()
}
}
}
}
func main() {
// Ticker that keeps the world ticking
ticker = time.NewTicker(time.Nanosecond * 40000)
// Initialize screen
win, err := x11.NewWindow()
if win == nil {
log.Fatalf("no window: %v", err)
}
screen := win.Screen()
bg := canvas.NewBackground(screen.(*image.RGBA), image.White, nil)
cvs = canvas.NewCanvas(nil, bg.Rect())
bg.SetItem(cvs)
bbox := cvs.Bbox()
height = uint32(bbox.Dy())
width = uint32(bbox.Dx())
// Set even handler for ui events
ec := win.EventChan()
go readKeyboardInput(ec)
var last time.Time
var now time.Time
last = time.Now()
// Parse scene
sceneparser.ParseJsonFile(world, defaultScenePath)
// Clear output buffer
clear()
renderer.Render(world, width, height, output)
paint()
win.FlushImage()
// Main loop
for {
now = <-ticker.C
paint()
win.FlushImage()
dt := now.Nanosecond() - last.Nanosecond()
last = now
dt = dt
}
}
func main() {
win, err := x11.NewWindow()
if err != nil {
fmt.Printf("Error: %v\n", err)
os.Exit(1)
}
defer win.Close()
evchan := win.EventChan()
for ev := range evchan {
switch e := ev.(type) {
case ui.ErrEvent:
fmt.Printf("Error: %v\n", e.Err)
os.Exit(1)
}
}
}
func main() {
win, err := x11.NewWindow()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer win.Close()
go func() {
upfps := fps()
screen := win.Screen()
for {
gennoise(screen)
win.FlushImage()
upfps <- true
}
}()
for _ = range win.EventChan() {
}
}
func main() {
flag.Parse()
var rocket image.Image
rfile, err := os.Open("rocket.png")
if err == nil {
rocket, err = png.Decode(rfile)
}
if err != nil {
log.Fatal("Cannot open rocket.png:", err)
}
rfile.Close()
rocketHeight := rocket.Bounds().Dy()
var flame image.Image
ffile, err := os.Open("flame.png")
if err == nil {
flame, err = png.Decode(ffile)
}
if err != nil {
log.Fatal("Cannot open flame.png:", err)
}
ffile.Close()
urls := make(chan string, 4)
imgReady := make(chan *image.Image, 4)
go imagePuller(urls, imgReady)
go urlGen(urls)
xdisp, err := x11.NewWindow()
if err != nil {
log.Fatal("X11 error: ", err)
}
screen := xdisp.Screen()
//2010/11/29 16:23:17 one tile is sized (0,0)-(256,256)
//2010/11/29 16:23:17 the screen is sized (0,0)-(800,600)
// log.Print("one tile is sized ", img.Bounds())
// log.Print("the screen is sized ", screen.Bounds())
numTiles := screen.Bounds().Dx()/tileWidth + 2
tileStrip := image.NewRGBA(image.Rect(0, 0, numTiles*tileWidth, tileHeight))
// pre-load the tile strip
for i := 0; i < numTiles; i++ {
iptr := <-imgReady
img := *iptr
draw.Draw(tileStrip, image.Rect(i*tileWidth, 0, i*tileWidth+tileWidth, tileHeight), img, image.ZP, draw.Over)
}
rocketLimit = tileHeight/2 - rocketHeight/2
topBlack := (screen.Bounds().Dy() - tileHeight) / 2
origin = image.Pt(10, topBlack+tileHeight/2-rocketHeight/2)
for {
for x := 0; x < tileWidth; x += 7 {
then := time.Now()
draw.Draw(screen, image.Rect(0, topBlack, screen.Bounds().Dx(), topBlack+tileHeight), tileStrip, image.Pt(x, 0), draw.Over)
if *game {
draw.Draw(screen, image.Rect(10, topBlack+tileHeight/2-rocketHeight/2+rocketPos, screen.Bounds().Dx(), topBlack+tileHeight), rocket, image.ZP, draw.Over)
for i := 0; i < 10; i++ {
if flames[i].active {
flames[i].where.X += 40
if flames[i].where.X > screen.Bounds().Dx() {
flames[i].active = false
}
draw.Draw(screen, image.Rectangle{flames[i].where.Add(origin).Add(image.Pt(0, rocketHeight/2)), screen.Bounds().Size()}, flame, image.Pt(0, 0), draw.Over)
}
}
}
now := time.Now()
frameTime := now.Sub(then)
// a flush is just a write on a channel, so it takes negligible time
xdisp.FlushImage()
toSleep := 0.1*1e9 - frameTime
// log.Print("Took ", frameTime, " ns to draw, will sleep ", toSleep, " ns")
time.Sleep(toSleep)
processEvent(xdisp.EventChan())
}
// shift tiles in tileStrip and put in new last one
draw.Draw(tileStrip, image.Rect(0, 0, (numTiles-1)*tileWidth, tileHeight), tileStrip, image.Pt(tileWidth, 0), draw.Over)
iptr := <-imgReady
img := *iptr
draw.Draw(tileStrip, image.Rect((numTiles-1)*tileWidth, 0, numTiles*tileWidth, tileHeight), img, image.ZP, draw.Over)
}
}
func main() {
rand.Seed(0)
ctxt, err := x11.NewWindow()
if ctxt == nil {
log.Fatalf("no window: %v", err)
}
screen := ctxt.Screen()
bg := canvas.NewBackground(screen.(*image.RGBA), image.White, flushFunc(ctxt))
window = canvas.NewCanvas(nil, bg.Rect())
bg.SetItem(window)
nballs := 0
ctxt.FlushImage()
csz := window.Rect().Max
// add edges of window
addLine(image.Pt(-1, -1), image.Pt(csz.X, -1))
addLine(image.Pt(csz.X, -1), image.Pt(csz.X, csz.Y))
addLine(image.Pt(csz.X, csz.Y), image.Pt(-1, csz.Y))
addLine(image.Pt(-1, csz.Y), image.Pt(-1, -1))
go sliderProc()
makeRect(image.Rect(30, 30, 200, 100), setAlpha(red, 128))
makeRect(image.Rect(150, 90, 230, 230), setAlpha(blue, 128))
window.Flush()
mkball := make(chan ball)
delball := make(chan bool)
pause := make(chan bool)
go monitor(mkball, delball, pause)
for i := 0; i < nballs; i++ {
mkball <- randBall()
}
ecc := make(chan (<-chan interface{}))
ec := ctxt.EventChan()
for {
select {
case e, ok := <-ec:
if !ok {
return
}
switch e := e.(type) {
case ui.MouseEvent:
if e.Buttons == 0 {
break
}
if window.HandleMouse(window, e, ec) {
break
}
switch {
case e.Buttons&1 != 0:
go handleMouse(e, ec, ecc, lineMaker)
ec = nil
case e.Buttons&2 != 0:
go handleMouse(e, ec, ecc, func(m ui.MouseEvent, ec <-chan interface{}) {
ballMaker(e, ec, mkball)
})
ec = nil
case e.Buttons&4 != 0:
delball <- true
}
case ui.KeyEvent:
fmt.Printf("got key %c (%d)\n", e.Key, e.Key)
switch e.Key {
case ' ':
pause <- true
case 'd':
delball <- true
}
default:
fmt.Printf("unknown event %v\n", e)
}
case ec = <-ecc:
break
}
}
}