func initSDLSubSystems(app *spectrum.Application) error {
if sdl.Init(sdl.INIT_VIDEO|sdl.INIT_AUDIO|sdl.INIT_JOYSTICK) != 0 {
return errors.New(sdl.GetError())
}
if ttf.Init() != 0 {
return errors.New(sdl.GetError())
}
if sdl.NumJoysticks() > 0 {
// Open joystick
joystick = sdl.JoystickOpen(DEFAULT_JOYSTICK_ID)
if joystick != nil {
if app.Verbose {
app.PrintfMsg("Opened Joystick %d", DEFAULT_JOYSTICK_ID)
app.PrintfMsg("Name: %s", sdl.JoystickName(DEFAULT_JOYSTICK_ID))
app.PrintfMsg("Number of Axes: %d", joystick.NumAxes())
app.PrintfMsg("Number of Buttons: %d", joystick.NumButtons())
app.PrintfMsg("Number of Balls: %d", joystick.NumBalls())
}
} else {
return errors.New("Couldn't open Joystick!")
}
}
sdl.WM_SetCaption("GoSpeccy - ZX Spectrum Emulator", "")
sdl.EnableUNICODE(1)
return nil
}
func newSDLSurface(app *spectrum.Application, w, h int) *SDLSurface {
surface := sdl.CreateRGBSurface(sdl.SWSURFACE, w, h, 32, 0, 0, 0, 0)
if surface == nil {
app.PrintfMsg("%s", sdl.GetError())
app.RequestExit()
return nil
}
return &SDLSurface{surface}
}
func playbackLoop(app *spectrum.Application, audio *SDLAudio) {
for audioData := range audio.playback {
audio.bufferRemove()
audio.render(audioData)
}
if app.Verbose {
app.PrintfMsg("audio playback loop: exit")
}
audio.playbackLoopFinished <- 0
}
// The composer's command loop.
// This function runs in a separate goroutine.
func (composer *SDLSurfaceComposer) commandLoop(app *spectrum.Application) {
evtLoop := app.NewEventLoop()
shutdown.Add(1)
for {
select {
case <-evtLoop.Pause:
evtLoop.Pause <- 0
case <-evtLoop.Terminate:
// Terminate this goroutine
if app.Verbose {
app.PrintfMsg("surface compositing loop: exit")
}
evtLoop.Terminate <- 0
shutdown.Done()
return
case untyped_cmd := <-composer.commandChannel:
switch cmd := untyped_cmd.(type) {
case cmd_add:
composer.add(app, cmd.surface, cmd.x, cmd.y, cmd.updatedRectsCh)
case cmd_remove:
composer.remove(cmd.surface, cmd.done)
case cmd_removeAll:
composer.removeAll(cmd.done)
case cmd_setPosition:
composer.setPosition(cmd.surface, cmd.x, cmd.y)
case cmd_replaceOutputSurface:
composer.output_orNil = cmd.surface_orNil
cmd.done <- 0
case cmd_showPaintedRegions:
composer.showPaintedRegions = cmd.enable
composer.repaintTheWholeOutputSurface()
case cmd_update:
composer.performCompositing(cmd.surface.x, cmd.surface.y, cmd.rects)
}
}
}
}
// Opens SDL audio.
// If 'playbackFrequency' is 0, the frequency will be equivalent to PLAYBACK_FREQUENCY.
func NewSDLAudio(app *spectrum.Application, playbackFrequency uint, hqAudio bool) (*SDLAudio, error) {
if playbackFrequency == 0 {
playbackFrequency = PLAYBACK_FREQUENCY
}
if playbackFrequency < MIN_PLAYBACK_FREQUENCY {
return nil, errors.New(fmt.Sprintf("playback frequency of %d Hz is too low", playbackFrequency))
}
// Open SDL audio
var spec sdl_audio.AudioSpec
{
spec.Freq = int(playbackFrequency)
spec.Format = sdl_audio.AUDIO_S16SYS
spec.Channels = 1
spec.Samples = uint16(2048 * float32(playbackFrequency) / PLAYBACK_FREQUENCY)
if sdl_audio.OpenAudio(&spec, &spec) != 0 {
return nil, errors.New(sdl.GetError())
}
if app.Verbose {
app.PrintfMsg("%#v", spec)
}
}
audio := &SDLAudio{
data: make(chan *spectrum.AudioData),
playback: make(chan *spectrum.AudioData, 2*BUFSIZE_IDEAL), // Use a buffered Go channel
playbackLoopFinished: make(chan byte),
forwarderLoopFinished: nil,
sdlAudioUnpaused: false,
bufSize: 0,
freq: uint(spec.Freq),
virtualFreq: uint(spec.Freq),
hqAudio: hqAudio,
}
go forwarderLoop(app.NewEventLoop(), audio)
go playbackLoop(app, audio)
return audio, nil
}
func newAppSurface(app *spectrum.Application, scale2x, fullscreen bool) SDLSurfaceAccessor {
var sdlMode int64
if fullscreen {
scale2x = true
sdlMode |= sdl.FULLSCREEN
sdl.ShowCursor(sdl.DISABLE)
} else {
sdl.ShowCursor(sdl.ENABLE)
sdlMode |= sdl.SWSURFACE
}
<-composer.ReplaceOutputSurface(nil)
surface := sdl.SetVideoMode(int(width(scale2x, fullscreen)), int(height(scale2x, fullscreen)), 32, uint32(sdlMode))
if app.Verbose {
app.PrintfMsg("video surface resolution: %dx%d", surface.W, surface.H)
}
<-composer.ReplaceOutputSurface(surface)
return &wrapSurface{surface}
}
func Main() {
var init_waitGroup *sync.WaitGroup
init_waitGroup = env.WaitName("init WaitGroup").(*sync.WaitGroup)
init_waitGroup.Add(1)
var app *spectrum.Application
app = env.Wait(reflect.TypeOf(app)).(*spectrum.Application)
var speccy *spectrum.Spectrum48k
speccy = env.Wait(reflect.TypeOf(speccy)).(*spectrum.Spectrum48k)
if !*enableSDL {
return
}
uiSettings = &InitialSettings{
scale2x: Scale2x,
fullscreen: Fullscreen,
showPaintedRegions: ShowPaintedRegions,
audio: Audio,
audioFreq: AudioFreq,
hqAudio: HQAudio,
}
composer = NewSDLSurfaceComposer(app)
composer.ShowPaintedRegions(*ShowPaintedRegions)
// SDL subsystems init
if err := initSDLSubSystems(app); err != nil {
app.PrintfMsg("%s", err)
app.RequestExit()
return
}
// Setup the display
r = NewSDLRenderer(app, speccy, *Scale2x, *Fullscreen, *Audio, *HQAudio, *AudioFreq)
setUI(r)
initCLI()
// Setup the audio
if *Audio {
audio, err := NewSDLAudio(app, *AudioFreq, *HQAudio)
if err == nil {
speccy.CommandChannel <- spectrum.Cmd_AddAudioReceiver{audio}
} else {
app.PrintfMsg("%s", err)
}
}
// Start the SDL event loop
go sdlEventLoop(app, speccy, *verboseInput)
init_waitGroup.Done()
hint := "Hint: Press F10 to invoke the built-in console.\n"
hint += " Input an empty line in the console to display available commands.\n"
fmt.Print(hint)
// Wait for all event loops to terminate, and then call 'sdl.Quit()'
shutdown.Wait()
if r.app.Verbose {
r.app.PrintfMsg("SDL: sdl.Quit()")
}
sdl.Quit()
}
// A Go routine for processing SDL events.
func sdlEventLoop(app *spectrum.Application, speccy *spectrum.Spectrum48k, verboseInput bool) {
evtLoop := app.NewEventLoop()
consoleIsVisible := false
shutdown.Add(1)
for {
select {
case <-evtLoop.Pause:
evtLoop.Pause <- 0
case <-evtLoop.Terminate:
// Terminate this Go routine
if app.Verbose {
app.PrintfMsg("SDL event loop: exit")
}
evtLoop.Terminate <- 0
shutdown.Done()
return
case event := <-sdl.Events:
switch e := event.(type) {
case sdl.QuitEvent:
if app.Verbose {
app.PrintfMsg("SDL quit -> request[exit the application]")
}
app.RequestExit()
case sdl.JoyAxisEvent:
if verboseInput {
app.PrintfMsg("[Joystick] Axis: %d, Value: %d", e.Axis, e.Value)
}
if e.Axis == 0 {
if e.Value > 0 {
speccy.Joystick.KempstonDown(spectrum.KEMPSTON_RIGHT)
} else if e.Value < 0 {
speccy.Joystick.KempstonDown(spectrum.KEMPSTON_LEFT)
} else {
speccy.Joystick.KempstonUp(spectrum.KEMPSTON_RIGHT)
speccy.Joystick.KempstonUp(spectrum.KEMPSTON_LEFT)
}
} else if e.Axis == 1 {
if e.Value > 0 {
speccy.Joystick.KempstonDown(spectrum.KEMPSTON_UP)
} else if e.Value < 0 {
speccy.Joystick.KempstonDown(spectrum.KEMPSTON_DOWN)
} else {
speccy.Joystick.KempstonUp(spectrum.KEMPSTON_UP)
speccy.Joystick.KempstonUp(spectrum.KEMPSTON_DOWN)
}
}
case sdl.JoyButtonEvent:
if verboseInput {
app.PrintfMsg("[Joystick] Button: %d, State: %d", e.Button, e.State)
}
if e.Button == 0 {
if e.State > 0 {
speccy.Joystick.KempstonDown(spectrum.KEMPSTON_FIRE)
} else {
speccy.Joystick.KempstonUp(spectrum.KEMPSTON_FIRE)
}
}
case sdl.KeyboardEvent:
keyName := sdl.GetKeyName(sdl.Key(e.Keysym.Sym))
if verboseInput {
app.PrintfMsg("\n")
app.PrintfMsg("%v: %v", e.Keysym.Sym, keyName)
app.PrintfMsg("Type: %02x Which: %02x State: %02x\n", e.Type, e.Which, e.State)
app.PrintfMsg("Scancode: %02x Sym: %08x Mod: %04x Unicode: %04x\n", e.Keysym.Scancode, e.Keysym.Sym, e.Keysym.Mod, e.Keysym.Unicode)
}
if (keyName == "escape") && (e.Type == sdl.KEYDOWN) {
if app.Verbose {
app.PrintfMsg("escape key -> request[exit the application]")
}
app.RequestExit()
} else if (keyName == "f10") && (e.Type == sdl.KEYDOWN) {
//if app.Verbose {
// app.PrintfMsg("f10 key -> toggle console")
//}
if !r.toggling {
r.toggling = true
if r.cliSurface_orNil == nil {
done := make(chan bool)
r.cliSurfaceCh <- cmd_newCliSurface{newCLISurface(r.scale2x, r.fullscreen), done}
<-done
}
anim := clingon.NewSliderAnimation(0.500, 1.0)
var targetState int
if consoleIsVisible {
targetState = HIDE
} else {
targetState = SHOW
}
r.sliderCh <- cmd_newSlider{anim, targetState}
anim.Start()
consoleIsVisible = !consoleIsVisible
}
} else {
if r.cliSurface_orNil != nil {
cliSurface := r.cliSurface_orNil
if (keyName == "page up") && (e.Type == sdl.KEYDOWN) {
cliSurface.EventCh() <- clingon.Cmd_Scroll{clingon.SCROLL_UP}
} else if (keyName == "page down") && (e.Type == sdl.KEYDOWN) {
cliSurface.EventCh() <- clingon.Cmd_Scroll{clingon.SCROLL_DOWN}
} else if (keyName == "up") && (e.Type == sdl.KEYDOWN) {
cli.PutReadline(clingon.HISTORY_PREV)
} else if (keyName == "down") && (e.Type == sdl.KEYDOWN) {
cli.PutReadline(clingon.HISTORY_NEXT)
} else if (keyName == "left") && (e.Type == sdl.KEYDOWN) {
cli.PutReadline(clingon.CURSOR_LEFT)
} else if (keyName == "right") && (e.Type == sdl.KEYDOWN) {
cli.PutReadline(clingon.CURSOR_RIGHT)
} else {
unicode := e.Keysym.Unicode
if unicode > 0 {
cli.PutUnicode(unicode)
}
}
} else {
sequence, haveMapping := spectrum.SDL_KeyMap[keyName]
if haveMapping {
switch e.Type {
case sdl.KEYDOWN:
// Normal order
for i := 0; i < len(sequence); i++ {
speccy.Keyboard.KeyDown(sequence[i])
}
case sdl.KEYUP:
// Reverse order
for i := len(sequence) - 1; i >= 0; i-- {
speccy.Keyboard.KeyUp(sequence[i])
}
}
}
}
}
}
}
}
}