func main() {
if !allegro.Init() {
log.Fatalln("Could not init Allegro.")
}
if !allegro.InstallKeyboard() {
log.Fatalln("Could not init Keyboard.")
}
if !imageio.Init() {
log.Fatalln("Could not init ImageIO.")
}
allegro.SetNewDisplayFlags(allegro.Resizable | allegro.GenerateExposeEvents)
display := allegro.CreateDisplay(640, 480)
defer display.Destroy()
if display == nil {
log.Fatalln("Unable to set any graphic mode")
}
allegro.SetNewBitmapFlags(allegro.MemoryBitmap)
bmp := allegro.LoadBitmap("data/mysha.pcx")
defer bmp.Destroy()
if bmp == nil {
log.Fatalln("Unable to load image")
}
queue := allegro.CreateEventQueue()
defer queue.Destroy()
if queue == nil {
log.Fatalln("Could not create Queue.")
}
queue.RegisterEventSource(allegro.GetKeyboardEventSource())
queue.RegisterEventSource(display.GetEventSource())
redraw := true
for {
if redraw && queue.IsEmpty() {
allegro.ClearToColor(allegro.MapRgb(255, 0, 0))
bmpW := float32(bmp.GetWidth())
bmpH := float32(bmp.GetHeight())
displayW := float32(display.GetWidth())
displayH := float32(display.GetHeight())
bmp.DrawScaled(0, 0, bmpW, bmpH, 0, 0, displayW, displayH, 0)
allegro.FlipDisplay()
redraw = false
}
event := queue.WaitForEvent()
if event.Type() == allegro.EventDisplayResize {
display.AcknowledgeResize()
redraw = true
}
if event.Type() == allegro.EventDisplayExpose {
redraw = true
}
if event.Type() == allegro.EventKeyDown && event.KeyboardKeycode() == allegro.KeyEscape {
break
}
if event.Type() == allegro.EventDisplayClose {
break
}
}
}
func main() {
var zoom float32 = 1.0
redraw := true
filename := "data/mysha.pcx"
if !allegro.Init() {
log.Fatalln("Could not init Allegro.")
}
if !allegro.InstallMouse() {
log.Fatalln("Could not init Mouse.")
}
if !allegro.InstallKeyboard() {
log.Fatalln("Could not init Keyboard.")
}
if !imageio.Init() {
log.Fatalln("Could not init ImageIO.")
}
display := allegro.CreateDisplay(640, 480)
defer display.Destroy()
if display == nil {
log.Fatalln("Could not create Display.")
}
display.SetWindowTitle(filename)
t := time.Now()
bitmap := allegro.LoadBitmap(filename)
defer bitmap.Destroy()
duration := time.Since(t)
if bitmap == nil {
log.Fatalf("%s not found or failed to load\n", filename)
}
fmt.Printf("Loading took %s\n", duration.String())
timer := allegro.CreateTimer(1.0 / 30)
defer timer.Destroy()
if timer == nil {
log.Fatalln("Could not create Timer.")
}
queue := allegro.CreateEventQueue()
defer queue.Destroy()
if queue == nil {
log.Fatalln("Could not create Queue.")
}
queue.RegisterEventSource(allegro.GetKeyboardEventSource())
queue.RegisterEventSource(allegro.GetMouseEventSource())
queue.RegisterEventSource(display.GetEventSource())
queue.RegisterEventSource(timer.GetEventSource())
timer.Start()
for {
event := queue.WaitForEvent()
if event.Type() == allegro.EventDisplayOrientation {
o := event.DisplayOrientation()
if o == allegro.DisplayOrientation0Degrees {
fmt.Println("0 degrees")
} else if o == allegro.DisplayOrientation90Degrees {
fmt.Println("90 degrees")
} else if o == allegro.DisplayOrientation180Degrees {
fmt.Println("180 degrees")
} else if o == allegro.DisplayOrientation270Degrees {
fmt.Println("270 degrees")
} else if o == allegro.DisplayOrientationFaceUp {
fmt.Println("Face up")
} else if o == allegro.DisplayOrientationFaceDown {
fmt.Println("Face down")
}
}
if event.Type() == allegro.EventDisplayClose {
fmt.Println("Closing.")
break
}
if event.Type() == allegro.EventMouseButtonDown {
fmt.Println("Mouse down + ", event.MouseButton())
}
if event.Type() == allegro.EventMouseButtonUp {
fmt.Println("Mouse up + ", event.MouseButton())
}
if event.Type() == allegro.EventKeyChar {
k := event.KeyboardKeycode()
u := event.KeyboardUnichar()
fmt.Println("Keycode + ", k)
fmt.Println("Unichar + ", u)
if k == allegro.KeyEscape {
fmt.Println("Closing (Escape key).")
break
}
if u == '1' {
zoom = 1
}
if u == '+' {
zoom *= 1.1
}
if u == '-' {
zoom /= 1.1
}
if u == 'f' {
zoom = float32(display.GetWidth()) / float32(bitmap.GetWidth())
}
}
if event.Type() == allegro.EventTimer {
redraw = true
}
if redraw && queue.IsEmpty() {
redraw = false
allegro.ClearToColor(allegro.MapRgb(255, 255, 255))
if zoom == 1 {
bitmap.Draw(0, 0, 0)
} else {
bitmap.DrawScaledRotated(0, 0, 0, 0, zoom, zoom, 0, 0)
}
allegro.FlipDisplay()
}
}
}