func LoadImage(path string) *Image {
var retval *Image
var texture *C.SDL_Texture
i := C.IMG_Load(C.CString(path))
if i == nil {
errlog.Println("Surface for", path, "loaded nil")
return nil
}
if renderer == nil {
errlog.Println("Cannot load image because renderer is nil")
return nil
}
runMainOp(func() {
texture = C.SDL_CreateTextureFromSurface(renderer, i)
})
if texture == nil {
errlog.Println("Texture for", path, "loaded nil")
return nil
}
retval = new(Image)
retval.surface = texture
C.SDL_FreeSurface(i)
return retval
}
func LoadPNG(path, name string) error {
// Make sure this name isn't already in use
if _, ok := Textures[name]; ok {
return errors.New("Texture name already in use")
}
// Convert the path to a c-string
cpath := C.CString(path)
defer C.free(unsafe.Pointer(cpath))
// Load the surface
surface := C.IMG_Load(cpath)
if surface == nil {
return errors.New("SDL_LoadBMP")
}
defer C.SDL_FreeSurface(surface)
// Create the texture
tex := C.SDL_CreateTextureFromSurface(renderer, surface)
if tex == nil {
return errors.New("SDL_CreateTextureFromSurface")
}
Textures[name] = Texture{tex: tex}
return nil
}
//Closes the window.
func CloseDisplay() {
if screen != nil {
close(kill)
C.SDL_FreeSurface(screen)
screen = nil
C.SDL_Quit()
}
}
func NewPaletteSurface(w, h int) (s *Surface) {
mutex.Lock()
defer mutex.Unlock()
ptr := C.SDL_CreateRGBSurface(0, C.int(w), C.int(h), 8, 0, 0, 0, 0)
s = &Surface{ptr}
runtime.SetFinalizer(s, func(s *Surface) { C.SDL_FreeSurface(s.ptr) })
return
}
func resize(img *C.SDL_Surface, width, height int) *C.SDL_Surface {
if img.w == 0 || img.h == 0 {
return nil
}
xstretch := C.double(float64(width) / float64(img.w))
ystretch := C.double(float64(height) / float64(img.h))
retval := C.zoomSurface(img, xstretch, ystretch, 1)
C.SDL_FreeSurface(img)
return retval
}
// Frees (deletes) a Surface
func (screen *Surface) Free() {
GlobalMutex.Lock()
screen.mutex.Lock()
C.SDL_FreeSurface(screen.cSurface)
screen.destroy()
if screen == currentVideoSurface {
currentVideoSurface = nil
}
screen.mutex.Unlock()
GlobalMutex.Unlock()
}
func NewSurface(w, h int) (s *Surface) {
mutex.Lock()
defer mutex.Unlock()
video := C.SDL_GetVideoSurface()
ptr := C.SDL_CreateRGBSurface(
0, C.int(w), C.int(h), C.int(video.format.BitsPerPixel),
video.format.Rmask,
video.format.Gmask,
video.format.Bmask,
video.format.Amask)
s = &Surface{ptr}
runtime.SetFinalizer(s, func(s *Surface) { C.SDL_FreeSurface(s.ptr) })
return
}
path string
width int
height int
}
func (me *imageKey) String() string {
return me.path + strconv.Itoa(me.width) + strconv.Itoa(me.height)
}
//Resizes images from imageFiles and caches them.
var images = newFlyweight(
func(path key) interface{} {
key := path.(*imageKey)
tmp := C.IMG_Load(C.CString(key.path))
i := C.SDL_DisplayFormatAlpha(tmp)
C.SDL_FreeSurface(tmp)
if key.width != -1 && key.height != -1 {
if (i != nil) && (int(i.w) != key.width || int(i.h) != key.height) {
i = resize(i, key.width, key.height)
}
}
return i
},
func(path key, img interface{}) {
i := img.(*C.SDL_Surface)
C.SDL_FreeSurface(i)
})
type Image struct {
img *C.SDL_Surface
key imageKey
func (surface *Surface) Free() {
C.SDL_FreeSurface(surface.cptr())
}
// Frees (deletes) a Surface
func (screen *Surface) Free() { C.SDL_FreeSurface((*C.SDL_Surface)(cast(screen))) }
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)
}
}
}
}
// Free frees a surface.
func (surface *Surface) Free() {
C.SDL_FreeSurface(surface.cSurface)
}
func (me *Text) Free() {
C.SDL_FreeSurface(me.text)
}
func (surface *Surface) Free() {
_surface := (*C.SDL_Surface)(unsafe.Pointer(surface))
C.SDL_FreeSurface(_surface)
}
func (s *Surface) Release() {
C.SDL_FreeSurface(s.Get())
}
// Frees (deletes) a Surface
func (screen *Surface) Free() {
C.SDL_FreeSurface(screen.cSurface)
screen.destroy()
}
// Frees the memory associated with the surface
func freeSurface(surface *C.SDL_Surface) {
C.SDL_FreeSurface(surface)
}
func freesurf(s *Surface) {
C.SDL_FreeSurface(s.surf)
C.SDL_FreeFormat(s.pixfmt)
}
func (s *Surface) Free() {
C.SDL_FreeSurface(s.c())
}
func (this Surface) Free() {
c_surface := (*C.SDL_Surface)(this.Ptr)
C.SDL_FreeSurface(c_surface)
}