//// Helper
func redraw(display *Display) {
col = uint8(int8(col) + add)
if col == 255 {
add = -1
} else if col == 0 {
add = 1
}
for i, _ := range display.data {
display.data[i] = byte(col)
}
display.surface.Damage(0, 0, 250, 250)
cb := gowl.NewCallback()
done := make(chan gowl.CallbackDone)
cb.AddDoneListener(done)
display.surface.Frame(cb)
display.surface.Commit()
func() {
for {
select {
case <-done:
redraw(display)
default:
display.display.Iterate()
c := time.Tick(time.Second / 100)
<-c
}
}
}()
}
func waitForSync(display *gowl.Display) {
cb := gowl.NewCallback()
done := make(chan gowl.CallbackDone)
cb.AddDoneListener(done)
display.Sync(cb)
func() {
for {
select {
case <-done:
return
default:
display.Iterate()
}
}
}()
}
func (w *Window) FlushImage(bounds ...image.Rectangle) {
w.surface.Attach(w.buffer, 0, 0)
for _, b := range bounds {
w.surface.Damage(int32(b.Min.X), int32(b.Min.Y), int32(b.Dx()), int32(b.Dy()))
}
// Wait for redraw to finish
cb := gowl.NewCallback()
done := make(chan interface{})
cb.AddDoneListener(done)
w.surface.Frame(cb)
func() {
for {
select {
case <-done:
return
default:
w.display.Iterate()
}
}
}()
}