// NewWindow returns a new window.
func NewWindow(title string, w, h int) *Window {
win := &Window{
events: make(chan interface{}, eventChanSize),
imgs: make(map[string]texture),
}
do(func() {
ctitle := C.CString(title)
defer C.free(unsafe.Pointer(ctitle))
x, y := C.SDL_WINDOWPOS_UNDEFINED, C.SDL_WINDOWPOS_UNDEFINED
flags := C.SDL_WINDOW_SHOWN | C.SDL_WINDOW_OPENGL
win.win = C.SDL_CreateWindow(ctitle, C.int(x), C.int(y), C.int(w), C.int(h), C.Uint32(flags))
if win.win == nil {
panic(sdlError())
}
win.rend = C.SDL_CreateRenderer(win.win, 0, C.SDL_RENDERER_ACCELERATED)
if win.rend == nil {
panic(sdlError())
}
if C.SDL_SetRenderDrawBlendMode(win.rend, C.SDL_BLENDMODE_BLEND) < 0 {
panic(sdlError())
}
win.id = windowID(C.SDL_GetWindowID(win.win))
windows[win.id] = win
})
return win
}
// CreateRenderer (https://wiki.libsdl.org/SDL_CreateRenderer)
func CreateRenderer(window *Window, index int, flags uint32) (*Renderer, error) {
_renderer := C.SDL_CreateRenderer(window.cptr(), C.int(index), C.Uint32(flags))
if _renderer == nil {
return nil, GetError()
}
return (*Renderer)(unsafe.Pointer(_renderer)), nil
}
func CreateRenderer(w *Window, index int, flags uint32) *Renderer {
GlobalMutex.Lock()
defer GlobalMutex.Unlock()
renderer := C.SDL_CreateRenderer(w.cWindow, C.int(index), C.Uint32(flags))
return wrapRenderer(renderer)
}
func (w *Window) CreateRenderer(i int, flags RendererFlags) (*Renderer, error) {
r := C.SDL_CreateRenderer(w.c, C.int(i), C.Uint32(flags))
if r == nil {
return nil, getError()
}
return &Renderer{r}, nil
}
func CreateRenderer(_window *Window, _index int) (renderer *Renderer, error string) {
raw := C.SDL_CreateRenderer(_window.window, C.int(_index), C.SDL_RENDERER_PRESENTVSYNC|C.SDL_RENDERER_ACCELERATED)
if raw == nil {
error = GetError()
return
}
renderer = (*Renderer)(cast(raw))
return
}
func OpenDisplay(w, h int, full bool) {
runtime.LockOSThread()
var i C.int = 0
if full {
i = 1
}
screen = C.openDisplay(C.int(w), C.int(h), i)
renderer = C.SDL_CreateRenderer(screen, -1, C.SDL_RENDERER_ACCELERATED)
C.SDL_SetRenderDrawBlendMode(renderer, C.SDL_BLENDMODE_BLEND)
Event_DrawEvent = C.SDL_RegisterEvents(1)
Event_MainOpEvent = C.SDL_RegisterEvents(1)
}
func NewWindow(title string, xpos, ypos, w, h int) (*Window, error) {
cs := C.CString(title)
defer C.free(unsafe.Pointer(cs))
ww := C.SDL_CreateWindow(cs, C.int(xpos), C.int(ypos), C.int(w), C.int(h), 0)
if ww == nil {
return nil, sdlerr()
}
r := C.SDL_CreateRenderer(ww, -1, C.SDL_RENDERER_ACCELERATED|C.SDL_RENDERER_PRESENTVSYNC)
if r == nil {
return nil, sdlerr()
}
win := &Window{ww, r}
runtime.SetFinalizer(win, freewin)
return win, nil
}
func LaunchGame(title string, width, height int) error {
// Convert the title to a c-string
ctitle := C.CString(title)
defer C.free(unsafe.Pointer(ctitle))
// Initialize SDL
if C.SDL_Init(C.SDL_INIT_VIDEO) < 0 {
return errors.New("SDL_Init")
}
defer C.SDL_Quit()
// Create the window
window = C.SDL_CreateWindow(ctitle, C.SDL_WINDOWPOS_UNDEFINED, C.SDL_WINDOWPOS_UNDEFINED, C.int(width), C.int(height), C.SDL_WINDOW_SHOWN)
if window == nil {
return errors.New("SDL_CreateWindow")
}
defer C.SDL_DestroyWindow(window)
// Create the renderer
renderer = C.SDL_CreateRenderer(window, C.int(-1), C.SDL_RENDERER_ACCELERATED|C.SDL_RENDERER_PRESENTVSYNC)
if renderer == nil {
return errors.New("SDL_CreateRenderer")
}
defer C.SDL_DestroyRenderer(renderer)
// Initialize image support
if success := int(C.initIMG()); success == 0 {
return errors.New("IMG_Init")
}
EventInit()
C.gameLoop()
destroyTextures()
return nil
}
func CreateRenderer(w *Window, index int, flags uint32) *Renderer {
renderer := C.SDL_CreateRenderer(w.cWindow, C.int(index), C.Uint32(flags))
return wrapRenderer(renderer)
}
func main() {
runtime.GOMAXPROCS(32)
// sdl
C.SDL_Init(C.SDL_INIT_AUDIO | C.SDL_INIT_VIDEO | C.SDL_INIT_TIMER)
defer C.SDL_Quit()
runtime.LockOSThread()
window := C.SDL_CreateWindow(C.CString("play"), 0, 0, 1680, 1050,
C.SDL_WINDOW_BORDERLESS|C.SDL_WINDOW_RESIZABLE|C.SDL_WINDOW_MAXIMIZED|C.SDL_WINDOW_OPENGL)
if window == nil {
fatalSDLError()
}
defer C.SDL_DestroyWindow(window)
C.SDL_DisableScreenSaver()
renderer := C.SDL_CreateRenderer(window, -1, C.SDL_RENDERER_ACCELERATED)
if renderer == nil {
fatalSDLError()
}
defer C.SDL_DestroyRenderer(renderer)
var width, height C.int
C.SDL_GetWindowSize(window, &width, &height)
texture := C.SDL_CreateTexture(renderer,
C.SDL_PIXELFORMAT_YV12,
C.SDL_TEXTUREACCESS_STREAMING,
width, height)
if texture == nil {
fatalSDLError()
}
defer C.SDL_DestroyTexture(texture)
// sdl ttf
if C.TTF_Init() == C.int(-1) {
log.Fatal("sdl ttf init failed")
}
defer C.TTF_Quit()
font := C.TTF_OpenFont(C.CString("/home/reus/font.ttf"), 32)
if font == nil {
fatalTTFError()
}
defer C.TTF_CloseFont(font)
// open decoder
decoder, err := NewDecoder(os.Args[1])
if err != nil {
log.Fatal(err)
}
if len(decoder.AudioStreams) == 0 || len(decoder.VideoStreams) == 0 {
log.Fatal("no video or audio")
}
defer decoder.Close()
// audio
aCodecCtx := decoder.AudioStreams[0].codec
audioStream := setupAudioOutput(int(aCodecCtx.sample_rate), int(aCodecCtx.channels), decoder)
// call closure in sdl thread
callEventCode := C.SDL_RegisterEvents(1)
callbacks := make(chan func(Env), 1024)
call := func(f func(env Env)) {
var event C.SDL_Event
var userevent C.SDL_UserEvent
userevent._type = C.SDL_USEREVENT
userevent.code = C.Sint32(callEventCode)
C.set_userevent(&event, userevent)
callbacks <- f
C.SDL_PushEvent(&event)
}
// show fps
nFrames := 0
var fpsTexture *C.SDL_Texture
var fpsColor C.SDL_Color
var fpsSrc, fpsDst C.SDL_Rect
fpsColor.r = 255
fpsColor.g = 255
fpsColor.b = 255
fpsColor.a = 0
go func() {
for _ = range time.NewTicker(time.Second * 1).C {
call(func(env Env) {
cText := C.CString(fmt.Sprintf("%d", nFrames))
sur := C.TTF_RenderUTF8_Blended(font, cText, fpsColor)
fpsSrc.w = sur.w
fpsSrc.h = sur.h
fpsDst.w = sur.w
fpsDst.h = sur.h
C.SDL_DestroyTexture(fpsTexture)
fpsTexture = C.SDL_CreateTextureFromSurface(env.renderer, sur)
C.SDL_FreeSurface(sur)
C.free(unsafe.Pointer(cText))
nFrames = 0
})
}
}()
// render
go func() {
for {
frame := <-decoder.timedFrames
nFrames++
call(func(env Env) {
C.SDL_UpdateYUVTexture(env.texture, nil,
(*C.Uint8)(unsafe.Pointer(frame.data[0])), frame.linesize[0],
(*C.Uint8)(unsafe.Pointer(frame.data[1])), frame.linesize[1],
(*C.Uint8)(unsafe.Pointer(frame.data[2])), frame.linesize[2])
C.SDL_RenderCopy(env.renderer, env.texture, nil, nil)
C.SDL_RenderCopy(env.renderer, fpsTexture, &fpsSrc, &fpsDst)
C.SDL_RenderPresent(env.renderer)
decoder.RecycleFrame(frame)
})
}
}()
// start decode
decoder.Start(decoder.VideoStreams[0], decoder.AudioStreams[0], width, height)
ret := C.Pa_StartStream(audioStream)
if ret != C.paNoError {
fatalPAError(ret)
}
// main loop
var ev C.SDL_Event
env := Env{
window: window,
renderer: renderer,
texture: texture,
}
for {
if C.SDL_WaitEvent(&ev) == C.int(0) {
fatalSDLError()
}
switch C.get_event_type(&ev) {
case C.SDL_QUIT:
os.Exit(0)
case C.SDL_KEYDOWN:
key := C.get_event_key(&ev)
switch key.keysym.sym {
case C.SDLK_q: // quit
os.Exit(0)
case C.SDLK_f: // forward
decoder.Seek(time.Second * 60)
}
case C.SDL_USEREVENT:
if C.get_userevent_code(&ev) == callEventCode {
(<-callbacks)(env)
}
}
}
}
func CreateRenderer(window *Window, index int, flags uint32) *Renderer {
_window := (*C.SDL_Window)(unsafe.Pointer(window))
_index := (C.int)(index)
_flags := (C.Uint32)(flags)
return (*Renderer)(unsafe.Pointer(C.SDL_CreateRenderer(_window, _index, _flags)))
}
func CreateRenderer(window *Window, index int, flags uint32) *Renderer {
return (*Renderer)(unsafe.Pointer(C.SDL_CreateRenderer(window.cptr(), C.int(index), C.Uint32(flags))))
}