func main() {
spec := &sdl.AudioSpec{
Freq: sampleHz,
Format: sdl.AUDIO_U8,
Channels: 2,
Samples: sampleHz,
Callback: sdl.AudioCallback(C.SineWave),
}
sdl.OpenAudio(spec, nil)
sdl.PauseAudio(0)
time.Sleep(1 * time.Second)
}
func main() {
if err := sdl.Init(sdl.INIT_AUDIO); err != nil {
log.Println(err)
return
}
defer sdl.Quit()
spec := &sdl.AudioSpec{
Freq: sampleHz,
Format: sdl.AUDIO_U8,
Channels: 2,
Samples: sampleHz,
Callback: sdl.AudioCallback(C.SineWave),
}
sdl.OpenAudio(spec, nil)
sdl.PauseAudio(false)
time.Sleep(1 * time.Second)
}
// win==nil requests a full-screen window
func Run(win WindowSpec) int {
// All SDL calls must come from same thread.
runtime.LockOSThread()
defer runtime.UnlockOSThread()
err := sdl.Init(sdl.INIT_EVERYTHING)
if err != nil {
panic(err)
}
defer sdl.Quit()
// Install audio callback
spec := &sdl.AudioSpec{
Freq: SampleRate,
Format: sdl.AUDIO_F32SYS,
Channels: 1,
Samples: 4096,
Callback: sdl.AudioCallback(C.getSoundSamplesAdaptor),
}
audioDevice, err := sdl.OpenAudioDevice("", false, spec, nil, 0)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to open audio device: %v\n", err)
panic(err)
}
if audioDevice < 2 {
fmt.Fprintf(os.Stderr, "Audio device=%v < 2 contrary to SDL-2 documentation\n", audioDevice, err)
}
sdl.PauseAudioDevice(audioDevice, false)
// Create window
var window *sdl.Window
if win != nil {
// Partial screen
winWidth, winHeight := win.Size()
window, err = sdl.CreateWindow(win.Title(), sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
int(winWidth), int(winHeight), sdl.WINDOW_SHOWN)
} else {
// Full screen
if isMacOS {
// Contrary to https://wiki.libsdl.org/SDL_CreateWindow, on MacOS 10.11.1
// a call to sdl.CreateWindow in fullscreen mode *does* use the w and h parameters.
// So ask what the display size is.
var mode sdl.DisplayMode
err = sdl.GetDesktopDisplayMode(0, &mode)
if err != nil {
fmt.Fprintf(os.Stderr, "Cannot get desktop display mode")
panic(err)
}
window, err = sdl.CreateWindow("", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
int(mode.W), int(mode.H), sdl.WINDOW_SHOWN|sdl.WINDOW_FULLSCREEN_DESKTOP)
} else {
window, err = sdl.CreateWindow("", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
0, 0, sdl.WINDOW_SHOWN|sdl.WINDOW_FULLSCREEN_DESKTOP)
}
}
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()
var nTex = 1
if isMacOS {
// Work around MacOS bug via double buffering
nTex = 2
}
// Create texture
tex := make([]*sdl.Texture, nTex)
for i := range tex {
tex[i], 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[i].Destroy()
}
for _, r := range renderClientList {
r.Init(int32(width), int32(height))
}
// Loop until quit
for i := 0; ; i ^= nTex - 1 {
for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
switch e := event.(type) {
case *sdl.QuitEvent:
return 0
case *sdl.MouseMotionEvent:
// Go equivalent of SDL_PRESSED seems to be missing, so compare with zero.
if e.State != 0 {
forwardMouseEvent(MouseDrag, int32(e.X), int32(e.Y))
} else {
forwardMouseEvent(MouseMove, int32(e.X), int32(e.Y))
}
case *sdl.MouseButtonEvent:
switch e.Type {
case sdl.MOUSEBUTTONDOWN:
forwardMouseEvent(MouseDown, int32(e.X), int32(e.Y))
case sdl.MOUSEBUTTONUP:
forwardMouseEvent(MouseUp, int32(e.X), int32(e.Y))
}
case *sdl.KeyDownEvent:
var k Key
if 0x20 <= e.Keysym.Sym && e.Keysym.Sym < 0x7F {
// Printable ASCII
k = Key(e.Keysym.Sym)
} else {
// Try special character table
k = keyMap[e.Keysym.Sym]
}
if k != 0 {
forwardKeyEvent(k)
}
}
}
pixels, pitch := lockTexture(tex[i], width, height)
pm := MakePixMap(int32(width), int32(height), pixels, int32(pitch))
for _, r := range renderClientList {
r.Render(pm)
}
tex[i].Unlock()
err := renderer.Clear()
if err != nil {
fmt.Fprintf(os.Stderr, "renderer.Clear: %v", err)
panic(err)
}
renderer.Copy(tex[i], nil, nil)
if err != nil {
fmt.Fprintf(os.Stderr, "renderer.Copy: %v", err)
panic(err)
}
renderer.Present()
}
}
func main() {
flags := flag.Args()
if len(flags) != 1 {
fmt.Println("Chippy - CHIP8 Emulator")
fmt.Println("Copyright (C) 2016 Andreas T Jonsson")
fmt.Printf("Version: %v\n\n", chip8.Version)
fmt.Printf("usage: chippy [program]\n\n")
return
}
sdl.Init(sdl.INIT_EVERYTHING)
defer sdl.Quit()
window, err := sdl.CreateWindow("", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, 800, 600, sdl.WINDOW_SHOWN)
if err != nil {
log.Fatalln(err)
}
defer window.Destroy()
renderer, err := sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
if err != nil {
log.Fatalln(err)
}
defer renderer.Destroy()
renderer.SetLogicalSize(800, 600)
renderer.SetDrawColor(0, 0, 0, 255)
texture, err := renderer.CreateTexture(sdl.PIXELFORMAT_BGR24, sdl.TEXTUREACCESS_STREAMING, 64, 32)
if err != nil {
log.Fatalln(err)
}
var specIn sdl.AudioSpec
specIn.Channels = 1
specIn.Format = sdl.AUDIO_U8
specIn.Freq = 11025
specIn.Samples = 4096
specIn.Callback = sdl.AudioCallback(C.audioCallback)
if err := sdl.OpenAudio(&specIn, nil); err != nil {
log.Fatalln(err)
}
defer sdl.CloseAudio()
m := &machine{
programPath: flags[0],
cpuSpeedHz: defaultCPUSpeed,
texture: texture,
renderer: renderer,
videoWidth: 64,
video: make([]byte, 64*32*3),
}
defer func() {
m.texture.Destroy()
}()
updateTitle(window, m)
sys := chip8.NewSystem(m)
cpuSpeedHz := m.cpuSpeedHz
tickRender := time.Tick(time.Second / 65)
tickCPU := time.Tick(time.Second / cpuSpeedHz)
for {
select {
case <-tickRender:
for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
switch t := event.(type) {
case *sdl.QuitEvent:
return
case *sdl.KeyUpEvent:
switch t.Keysym.Sym {
case sdl.K_ESCAPE:
return
case sdl.K_BACKSPACE:
sys.Reset()
case sdl.K_g:
toggleFullscreen(window)
case sdl.K_p:
if m.cpuSpeedHz < 2000 {
m.cpuSpeedHz += 100
}
case sdl.K_m:
if m.cpuSpeedHz > 100 {
m.cpuSpeedHz -= 100
}
case sdl.K_d:
if t.Keysym.Mod&sdl.KMOD_CTRL != 0 {
dumpSystem(sys, flags[0])
}
}
}
}
if cpuSpeedHz != m.cpuSpeedHz {
cpuSpeedHz = m.cpuSpeedHz
updateTitle(window, m)
tickCPU = time.Tick(time.Second / m.cpuSpeedHz)
}
sys.Refresh()
renderer.Clear()
texture.Update(nil, unsafe.Pointer(&m.video[0]), m.videoWidth*3)
renderer.Copy(m.texture, nil, nil)
renderer.Present()
case <-tickCPU:
if err := sys.Step(); err != nil {
dumpSystem(sys, flags[0])
log.Fatalln(err)
}
}
}
}
