func main() {
done := false
redraw := true
if !allegro.Init() {
log.Fatalln("Failed to init Allegro.")
}
if !imageio.Init() {
log.Fatalln("Failed to init IIO addon.")
}
font.InitFont()
display := allegro.CreateDisplay(640, 480)
defer display.Destroy()
if display == nil {
log.Fatalln("Error creating display.")
}
if !allegro.InstallKeyboard() {
log.Fatalln("Error installing keyboard.")
}
font := font.LoadFont("data/fixed_font.tga", 0, 0)
if font == nil {
log.Fatalln("Error loading data/fixed_font.tga")
}
bmp := allegro.LoadBitmap("data/mysha.pcx")
dispBmp := bmp
defer bmp.Destroy()
if bmp == nil {
log.Fatalln("Error loading data/mysha.pcx")
}
text := "Display bitmap (space to change)"
allegro.SetNewBitmapFlags(allegro.MemoryBitmap)
memBmp := allegro.LoadBitmap("data/mysha.pcx")
defer memBmp.Destroy()
if memBmp == nil {
log.Fatalln("Error loading data/mysha.pcx")
}
timer := allegro.CreateTimer(INTERVAL)
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(display.GetEventSource())
queue.RegisterEventSource(timer.GetEventSource())
timer.Start()
allegro.SetBlender(allegro.Add, allegro.One, allegro.InverseAlpha)
for !done {
if redraw && queue.IsEmpty() {
update(bmp)
allegro.ClearToColor(allegro.MapRgbF(0, 0, 0))
bmp.DrawTinted(allegro.MapRgbaF(1, 1, 1, 0.5), bmpX, bmpY, bmpFlag)
font.DrawText(allegro.MapRgbaF(1, 1, 1, 0.5), 0, 0, 0, text)
allegro.FlipDisplay()
redraw = false
}
event := queue.WaitForEvent()
switch event.Type() {
case allegro.EventKeyDown:
if event.KeyboardKeycode() == allegro.KeyEscape {
done = true
} else if event.KeyboardKeycode() == allegro.KeySpace {
if bmp == memBmp {
bmp = dispBmp
text = "Display bitmap (space to change)"
} else {
bmp = memBmp
text = "Memory bitmap (space to change)"
}
}
case allegro.EventDisplayClose:
done = true
case allegro.EventTimer:
redraw = true
}
}
}
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
}
}
}