// Quit causes Run() to return after processing any pending events.
func Quit() {
sdl.PushEvent(&sdl.QuitEvent{Type: sdl.QUIT})
}
func run() int {
// See discussion at https://github.com/golang/go/wiki/LockOSThread
runtime.LockOSThread()
defer runtime.UnlockOSThread()
// Create window
window, err := sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight, sdl.WINDOW_SHOWN)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %v\n", err)
panic(err)
}
defer window.Destroy()
// Create renderer
width, height := window.GetSize()
renderer, err := sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED|sdl.RENDERER_PRESENTVSYNC)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create renderer: %v\n", err)
panic(err)
}
defer renderer.Destroy()
// Create texture
tex, err := renderer.CreateTexture(sdl.PIXELFORMAT_ARGB8888, sdl.TEXTUREACCESS_STREAMING, width, height)
if err != nil {
fmt.Fprintf(os.Stderr, "renderer.CreateTexture: %v\n", err)
panic(err)
}
defer tex.Destroy()
// Show crosshair animation. Quit when a key comes up.
var mouseX, mouseY int
for {
for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
switch t := event.(type) {
case *sdl.QuitEvent:
return 0
case *sdl.MouseMotionEvent:
mouseX = int(t.X)
mouseY = int(t.Y)
case *sdl.KeyUpEvent:
sdl.PushEvent(&sdl.QuitEvent{Type: sdl.QUIT})
}
}
pixels, pitch := lockTexture(tex, width, height)
drawCross(pixels, pitch, width, height, mouseX, mouseY)
tex.Unlock()
err := renderer.Clear()
if err != nil {
fmt.Fprintf(os.Stderr, "renderer.Clear: %v", err)
panic(err)
}
renderer.Copy(tex, nil, nil)
if err != nil {
fmt.Fprintf(os.Stderr, "renderer.Copy: %v", err)
panic(err)
}
renderer.Present()
}
return 0
}
func main() {
var window *sdl.Window
var renderer *sdl.Renderer
var event sdl.Event
var running bool
window = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight, sdl.WINDOW_SHOWN)
if window == nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", sdl.GetError())
os.Exit(1)
}
renderer = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
if renderer == nil {
fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", sdl.GetError())
os.Exit(2)
}
running = true
lastPushTime := sdl.GetTicks()
for running {
// Push a UserEvent every second
if lastPushTime+pushTime < sdl.GetTicks() {
lastPushTime = sdl.GetTicks()
pEvent := &sdl.UserEvent{sdl.USEREVENT, sdl.GetTicks(), window.GetID(), 1331, nil, nil}
retVal := sdl.PushEvent(pEvent) // Here's where the event is actually pushed
switch retVal {
case 1:
fmt.Println("PushEvent returned success")
case 0:
fmt.Println("PushEvent returned filtered")
case -1:
fmt.Printf("PushEvent returned error: %s\n", sdl.GetError)
}
}
for event = sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
switch t := event.(type) {
case *sdl.QuitEvent:
running = false
case *sdl.MouseMotionEvent:
fmt.Printf("[%d ms] MouseMotion\ttype:%d\tid:%d\tx:%d\ty:%d\txrel:%d\tyrel:%d\n",
t.Timestamp, t.Type, t.Which, t.X, t.Y, t.XRel, t.YRel)
case *sdl.MouseButtonEvent:
fmt.Printf("[%d ms] MouseButton\ttype:%d\tid:%d\tx:%d\ty:%d\tbutton:%d\tstate:%d\n",
t.Timestamp, t.Type, t.Which, t.X, t.Y, t.Button, t.State)
case *sdl.MouseWheelEvent:
fmt.Printf("[%d ms] MouseWheel\ttype:%d\tid:%d\tx:%d\ty:%d\n",
t.Timestamp, t.Type, t.Which, t.X, t.Y)
case *sdl.KeyUpEvent:
fmt.Printf("[%d ms] Keyboard\ttype:%d\tsym:%c\tmodifiers:%d\tstate:%d\trepeat:%d\n",
t.Timestamp, t.Type, t.Keysym.Sym, t.Keysym.Mod, t.State, t.Repeat)
case *sdl.UserEvent:
fmt.Printf("[%d ms] UserEvent\tcode:%d\n", t.Timestamp, t.Code)
}
}
sdl.Delay(1000 / 30)
}
renderer.Destroy()
window.Destroy()
}
// SetEventMode sets the event handler mode to polling or event-based
func (g *GameManager) SetEventMode(eventMode int) {
g.eventMode = eventMode
// Push an empty event to kick out of WaitEvent() or WaitEventTimeout()
sdl.PushEvent(&sdl.UserEvent{Type: 0})
}