func drawTile(wg *sync.WaitGroup, w screen.Window, pool *tilePool, origin image.Point, x, y int) {
defer wg.Done()
tp := image.Point{
(x + origin.X) >> 8,
(y + origin.Y) >> 8,
}
tex, err := pool.get(tp)
if err != nil {
log.Println(err)
return
}
screen.Copy(w, image.Point{x, y}, tex, tileBounds, draw.Src, nil)
}
func main() {
driver.Main(func(s screen.Screen) {
w, err := s.NewWindow(nil)
if err != nil {
log.Fatal(err)
}
defer w.Release()
winSize := image.Point{256, 256}
b, err := s.NewBuffer(winSize)
if err != nil {
log.Fatal(err)
}
defer b.Release()
drawGradient(b.RGBA())
t, err := s.NewTexture(winSize)
if err != nil {
log.Fatal(err)
}
defer t.Release()
t.Upload(image.Point{}, b, b.Bounds())
var sz size.Event
for {
e := w.NextEvent()
// This print message is to help programmers learn what events this
// example program generates. A real program shouldn't print such
// messages; they're not important to end users.
format := "got %#v\n"
if _, ok := e.(fmt.Stringer); ok {
format = "got %v\n"
}
fmt.Printf(format, e)
switch e := e.(type) {
case lifecycle.Event:
if e.To == lifecycle.StageDead {
return
}
case key.Event:
if e.Code == key.CodeEscape {
return
}
case paint.Event:
w.Fill(sz.Bounds(), blue0, screen.Src)
w.Fill(sz.Bounds().Inset(10), blue1, screen.Src)
w.Upload(image.Point{}, b, b.Bounds())
w.Fill(image.Rect(50, 50, 350, 120), red, screen.Over)
screen.Copy(w, image.Point{150, 100}, t, t.Bounds(), screen.Over, nil)
w.Draw(f64.Aff3{
+cos30, -sin30, 100,
+sin30, +cos30, 200,
}, t, t.Bounds(), screen.Over, nil)
w.Publish()
case size.Event:
sz = e
case error:
log.Print(e)
}
}
})
}