// Renderer (https://wiki.libsdl.org/SDL_CreateTextureFromSurface)
func (renderer *Renderer) CreateTextureFromSurface(surface *Surface) (*Texture, error) {
_texture := C.SDL_CreateTextureFromSurface(renderer.cptr(), surface.cptr())
if _texture == nil {
return nil, GetError()
}
return (*Texture)(unsafe.Pointer(_texture)), nil
}
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 CreateTextureFromSurface(r *Renderer, s *Surface) *Texture {
GlobalMutex.Lock()
defer GlobalMutex.Unlock()
texture := C.SDL_CreateTextureFromSurface(r.cRenderer, s.cSurface)
return wrapTexture(texture)
}
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
}
func (r *Renderer) CreateTextureFromSurface(s *Surface) (*Texture, error) {
t := C.SDL_CreateTextureFromSurface(r.c, s.c())
if t == nil {
return nil, getError()
}
return &Texture{t}, nil
}
func (w *Window) NewTexture(s *Surface) (*Texture, error) {
t := C.SDL_CreateTextureFromSurface(w.ren, s.surf)
if t == nil {
return nil, sdlerr()
}
tex := &Texture{t}
runtime.SetFinalizer(tex, freetex)
return tex, nil
}
func (me *Font) WriteTo(text string, t *Image, c Color) bool {
sur := C.TTF_RenderText_Blended(me.font, C.CString(text), c.toSDL_Color())
runMainOp(func() {
t.surface = C.SDL_CreateTextureFromSurface(renderer, sur)
})
var w, h C.int
C.SDL_QueryTexture(t.surface, nil, nil, &w, &h)
t.Width = int(w)
t.Height = int(h)
return t.surface != nil
}
func (r *Renderer) CreateTextureFromSurface(s *Surface) *Texture {
texture := C.SDL_CreateTextureFromSurface(r.cRenderer, s.cSurface)
return wrapTexture(texture)
}
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 (renderer *Renderer) CreateTextureFromSurface(surface *Surface) *Texture {
_renderer := (*C.SDL_Renderer)(unsafe.Pointer(renderer))
_surface := (*C.SDL_Surface)(unsafe.Pointer(surface))
return (*Texture)(unsafe.Pointer(C.SDL_CreateTextureFromSurface(_renderer, _surface)))
}
func (s *Surface) CreateTexture(_renderer *Renderer) *Texture {
var tex = C.SDL_CreateTextureFromSurface(_renderer.Get(), s.Get())
return (*Texture)(cast(tex))
}
func (renderer *Renderer) CreateTextureFromSurface(surface *Surface) *Texture {
return (*Texture)(unsafe.Pointer(C.SDL_CreateTextureFromSurface(renderer.cptr(), surface.cptr())))
}