C++ SDL_OutOfMemory函数代码示例

static int ROM_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
	long info;
	
	/* Check out some things about the system */
	Gestalt(gestaltQuickdrawVersion, &info);
	if ( info == gestaltOriginalQD ) {
		SDL_SetError("Color Quickdraw not available");
		return(-1);
	}

	/* Start ROMintosh events */
	Mac_InitEvents(this);

	/* Get a handle to the main monitor */
	SDL_Display = GetMainDevice();

	/* Determine the current screen size */
	this->info.current_w = (**SDL_Display).gdRect.right;
	this->info.current_h = (**SDL_Display).gdRect.bottom;

	/* Determine pixel format */
	vformat->BitsPerPixel = (**(**SDL_Display).gdPMap).pixelSize;
	switch (vformat->BitsPerPixel) {
		case 16:	/* 5-5-5 RGB */
			vformat->Rmask = 0x00007c00;
			vformat->Gmask = 0x000003e0;
			vformat->Bmask = 0x0000001f;
			break;
		default:
			break;
	}

	/* Create our palette */
	SDL_CTab = (CTabHandle)NewHandle(sizeof(ColorSpec)*256 + 8);
	if ( SDL_CTab == nil ) {
		SDL_OutOfMemory();
		return(-1);
	}
	(**SDL_CTab).ctSeed = GetCTSeed();
	(**SDL_CTab).ctFlags = 0;
	(**SDL_CTab).ctSize = 255;
	CTabChanged(SDL_CTab);
	SDL_CPal = NewPalette(256, SDL_CTab, pmExplicit+pmTolerant, 0);

	/* Get a list of available fullscreen modes */
	SDL_modelist = (SDL_Rect **)SDL_malloc((1+1)*sizeof(SDL_Rect *));
	if ( SDL_modelist ) {
		SDL_modelist[0] = (SDL_Rect *)SDL_malloc(sizeof(SDL_Rect));
		if ( SDL_modelist[0] ) {
			SDL_modelist[0]->x = 0;
			SDL_modelist[0]->y = 0;
			SDL_modelist[0]->w = (**SDL_Display).gdRect.right;
			SDL_modelist[0]->h = (**SDL_Display).gdRect.bottom;
		}
		SDL_modelist[1] = NULL;
	}

	/* Fill in some window manager capabilities */
	this->info.wm_available = 1;

	/* We're done! */
	return(0);
}

/* Function to open a joystick for use.
   The joystick to open is specified by the index field of the joystick.
   This should fill the nbuttons and naxes fields of the joystick structure.
   It returns 0, or -1 if there is an error.
 */
int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
{
    int     index;
    UInt32  count, gotCount, count2;
    long    numAxis, numButtons, numHats, numBalls;

    count = kMaxReferences;
    count2 = 0;
    numAxis = numButtons = numHats = numBalls = 0;

    index = joystick->index;

    /* allocate memory for system specific hardware data */
    joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata));
    if (joystick->hwdata == NULL)
    {
		SDL_OutOfMemory();
		return(-1);
    }
    SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata));
    SDL_strlcpy(joystick->hwdata->name, SDL_SYS_JoystickName(index), SDL_arraysize(joystick->hwdata->name));
    joystick->name = joystick->hwdata->name;

    ISpElementList_ExtractByKind(
        SYS_Elements[index],
        kISpElementKind_Axis,
        count,
        &gotCount,
        joystick->hwdata->refs);

    numAxis = gotCount;
    count -= gotCount;
    count2 += gotCount;

    ISpElementList_ExtractByKind(
        SYS_Elements[index],
        kISpElementKind_DPad,
        count,
        &gotCount,
        &(joystick->hwdata->refs[count2]));

    numHats = gotCount;
    count -= gotCount;
    count2 += gotCount;

    ISpElementList_ExtractByKind(
        SYS_Elements[index],
        kISpElementKind_Button,
        count,
        &gotCount,
        &(joystick->hwdata->refs[count2]));

    numButtons = gotCount;
    count -= gotCount;
    count2 += gotCount;

    joystick->naxes = numAxis;
    joystick->nhats = numHats;
    joystick->nballs = numBalls;
    joystick->nbuttons = numButtons;

    ISpDevices_Activate(
        1,
        &SYS_Joysticks[index]);

    return 0;
}

static int
XAUDIO2_OpenDevice(_THIS, const char *devname, int iscapture)
{
    HRESULT result = S_OK;
    WAVEFORMATEX waveformat;
    int valid_format = 0;
    SDL_AudioFormat test_format = SDL_FirstAudioFormat(_this->spec.format);
    IXAudio2 *ixa2 = NULL;
    IXAudio2SourceVoice *source = NULL;
    UINT32 devId = 0;  /* 0 == system default device. */

    if (iscapture) {
        return SDL_SetError("XAudio2: capture devices unsupported.");
    } else if (XAudio2Create(&ixa2, 0, XAUDIO2_DEFAULT_PROCESSOR) != S_OK) {
        return SDL_SetError("XAudio2: XAudio2Create() failed at open.");
    }

    if (devname != NULL) {
        UINT32 devcount = 0;
        UINT32 i = 0;

        if (i == devcount) {
            ixa2->Release();
            return SDL_SetError("XAudio2: Requested device not found.");
        }
    }

    /* Initialize all variables that we clean on shutdown */
    _this->hidden = (struct SDL_PrivateAudioData *)
        SDL_malloc((sizeof *_this->hidden));
    if (_this->hidden == NULL) {
        return SDL_OutOfMemory();
    }
    SDL_memset(_this->hidden, 0, (sizeof *_this->hidden));

    _this->hidden->ixa2 = ixa2;
    _this->hidden->semaphore = CreateSemaphoreEx(NULL, 1, 2, NULL, 0, 0);
    if (_this->hidden->semaphore == NULL) {
        XAUDIO2_CloseDevice(_this);
        return SDL_SetError("XAudio2: CreateSemaphore() failed!");
    }

    while ((!valid_format) && (test_format)) {
        switch (test_format) {
        case AUDIO_U8:
        case AUDIO_S16:
        case AUDIO_S32:
        case AUDIO_F32:
            _this->spec.format = test_format;
            valid_format = 1;
            break;
        }
        test_format = SDL_NextAudioFormat();
    }

    if (!valid_format) {
        XAUDIO2_CloseDevice(_this);
        return SDL_SetError("XAudio2: Unsupported audio format");
    }

    /* Update the fragment size as size in bytes */
    SDL_CalculateAudioSpec(&_this->spec);

    /* We feed a Source, it feeds the Mastering, which feeds the device. */
    _this->hidden->mixlen = _this->spec.size;
    _this->hidden->mixbuf = (Uint8 *) SDL_malloc(2 * _this->hidden->mixlen);
    if (_this->hidden->mixbuf == NULL) {
        XAUDIO2_CloseDevice(_this);
        return SDL_OutOfMemory();
    }
    _this->hidden->nextbuf = _this->hidden->mixbuf;
    SDL_memset(_this->hidden->mixbuf, 0, 2 * _this->hidden->mixlen);

    /* We use XAUDIO2_DEFAULT_CHANNELS instead of _this->spec.channels. On
       Xbox360, _this means 5.1 output, but on Windows, it means "figure out
       what the system has." It might be preferable to let XAudio2 blast
       stereo output to appropriate surround sound configurations
       instead of clamping to 2 channels, even though we'll configure the
       Source Voice for whatever number of channels you supply. */
    result = ixa2->CreateMasteringVoice(&_this->hidden->mastering,
											XAUDIO2_DEFAULT_CHANNELS, _this->spec.freq, 0,
											nullptr, nullptr, AudioCategory_GameMedia);
//                                            XAUDIO2_DEFAULT_CHANNELS,
//                                            _this->spec.freq, 0, devId, NULL);
    if (result != S_OK) {
        XAUDIO2_CloseDevice(_this);
        return SDL_SetError("XAudio2: Couldn't create mastering voice");
    }

    SDL_zero(waveformat);
    if (SDL_AUDIO_ISFLOAT(_this->spec.format)) {
        waveformat.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
    } else {
        waveformat.wFormatTag = WAVE_FORMAT_PCM;
    }
    waveformat.wBitsPerSample = SDL_AUDIO_BITSIZE(_this->spec.format);
    waveformat.nChannels = _this->spec.channels;
    waveformat.nSamplesPerSec = _this->spec.freq;
    waveformat.nBlockAlign =
        waveformat.nChannels * (waveformat.wBitsPerSample / 8);
//.........这里部分代码省略.........

SDL_Renderer *
GL_CreateRenderer(SDL_Window * window, Uint32 flags)
{
    SDL_Renderer *renderer;
    GL_RenderData *data;
    const char *hint;
    GLint value;
    Uint32 window_flags;

    window_flags = SDL_GetWindowFlags(window);
    if (!(window_flags & SDL_WINDOW_OPENGL)) {
        if (SDL_RecreateWindow(window, window_flags | SDL_WINDOW_OPENGL) < 0) {
            return NULL;
        }
    }

    renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
    if (!renderer) {
        SDL_OutOfMemory();
        return NULL;
    }

    data = (GL_RenderData *) SDL_calloc(1, sizeof(*data));
    if (!data) {
        GL_DestroyRenderer(renderer);
        SDL_OutOfMemory();
        return NULL;
    }

    renderer->WindowEvent = GL_WindowEvent;
    renderer->CreateTexture = GL_CreateTexture;
    renderer->UpdateTexture = GL_UpdateTexture;
    renderer->LockTexture = GL_LockTexture;
    renderer->UnlockTexture = GL_UnlockTexture;
    renderer->UpdateViewport = GL_UpdateViewport;
    renderer->RenderClear = GL_RenderClear;
    renderer->RenderDrawPoints = GL_RenderDrawPoints;
    renderer->RenderDrawLines = GL_RenderDrawLines;
    renderer->RenderFillRects = GL_RenderFillRects;
    renderer->RenderCopy = GL_RenderCopy;
    renderer->RenderReadPixels = GL_RenderReadPixels;
    renderer->RenderPresent = GL_RenderPresent;
    renderer->DestroyTexture = GL_DestroyTexture;
    renderer->DestroyRenderer = GL_DestroyRenderer;
    renderer->info = GL_RenderDriver.info;
    renderer->info.flags = SDL_RENDERER_ACCELERATED;
    renderer->driverdata = data;

    data->context = SDL_GL_CreateContext(window);
    if (!data->context) {
        GL_DestroyRenderer(renderer);
        return NULL;
    }
    if (SDL_GL_MakeCurrent(window, data->context) < 0) {
        GL_DestroyRenderer(renderer);
        return NULL;
    }

    if (GL_LoadFunctions(data) < 0) {
        GL_DestroyRenderer(renderer);
        return NULL;
    }

#ifdef __MACOSX__
    /* Enable multi-threaded rendering */
    /* Disabled until Ryan finishes his VBO/PBO code...
       CGLEnable(CGLGetCurrentContext(), kCGLCEMPEngine);
     */
#endif

    if (flags & SDL_RENDERER_PRESENTVSYNC) {
        SDL_GL_SetSwapInterval(1);
    } else {
        SDL_GL_SetSwapInterval(0);
    }
    if (SDL_GL_GetSwapInterval() > 0) {
        renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
    }

    data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
    renderer->info.max_texture_width = value;
    data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
    renderer->info.max_texture_height = value;

    if (SDL_GL_ExtensionSupported("GL_ARB_texture_rectangle")
        || SDL_GL_ExtensionSupported("GL_EXT_texture_rectangle")) {
        data->GL_ARB_texture_rectangle_supported = SDL_TRUE;
    }

    /* Check for multitexture support */
    if (SDL_GL_ExtensionSupported("GL_ARB_multitexture")) {
        data->glActiveTextureARB = (PFNGLACTIVETEXTUREARBPROC) SDL_GL_GetProcAddress("glActiveTextureARB");
        if (data->glActiveTextureARB) {
            data->GL_ARB_multitexture_supported = SDL_TRUE;
            data->glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &data->num_texture_units);
        }
    }

    /* Check for shader support */
    hint = SDL_GetHint(SDL_HINT_RENDER_OPENGL_SHADERS);
//.........这里部分代码省略.........

static int
N3DSAUD_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
{
    int format, mixlen, i;
    this->hidden = (struct SDL_PrivateAudioData *)
                   SDL_malloc(sizeof(*this->hidden));
    if (this->hidden == NULL) {
        return SDL_OutOfMemory();
    }
    SDL_memset(this->hidden, 0, sizeof(*this->hidden));
    switch (this->spec.format & 0xff) {
    case 8:
    case 16:
        this->spec.format = AUDIO_S16LSB;
        break;
    default:
        return SDL_SetError("Unsupported audio format");
    }

    /* The sample count must be a multiple of 64. */
    // this->spec.samples = PSP_AUDIO_SAMPLE_ALIGN(this->spec.samples);
    this->spec.freq = 44100;

    /* Update the fragment size as size in bytes. */
    /*  SDL_CalculateAudioSpec(this->spec); MOD */
    /* switch (this->spec.format) {
     case AUDIO_U8:
         this->spec.silence = 0x80;
         break;
     default:
         this->spec.silence = 0x00;
         break;
     }*/
    this->spec.size = SDL_AUDIO_BITSIZE(this->spec.format) / 8;
    this->spec.size *= this->spec.channels;
    this->spec.size *= this->spec.samples;

    /* ========================================== */

    /* Allocate the mixing buffer.  Its size and starting address must
       be a multiple of 64 bytes.  Our sample count is already a multiple of
       64, so spec->size should be a multiple of 64 as well. */
    mixlen = this->spec.size * NUM_BUFFERS;
    this->hidden->rawbuf = (Uint8 *) memalign(64, mixlen);
    if (this->hidden->rawbuf == NULL) {
        return SDL_SetError("Couldn't allocate mixing buffer");
    }

    /* Setup the hardware channel. */
    if (this->spec.channels == 1) {
        //format = PSP_AUDIO_FORMAT_MONO;
    } else {
        //format = PSP_AUDIO_FORMAT_STEREO;
    }
    // this->hidden->channel = sceAudioChReserve(PSP_AUDIO_NEXT_CHANNEL, this->spec.samples, format);
    if (this->hidden->channel < 0) {
        free(this->hidden->rawbuf);
        this->hidden->rawbuf = NULL;
        return SDL_SetError("Couldn't reserve hardware channel");
    }

    memset(this->hidden->rawbuf, 0, mixlen);
    for (i = 0; i < NUM_BUFFERS; i++) {
        this->hidden->mixbufs[i] = &this->hidden->rawbuf[i * this->spec.size];
    }

    this->hidden->next_buffer = 0;
    return 0;
}

/*
 * Create an empty RGB surface of the appropriate depth
 */
SDL_Surface *
SDL_CreateRGBSurface(Uint32 flags,
                     int width, int height, int depth,
                     Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
{
    SDL_Surface *surface;
    Uint32 format;

    /* The flags are no longer used, make the compiler happy */
    (void)flags;

    /* Get the pixel format */
    format = SDL_MasksToPixelFormatEnum(depth, Rmask, Gmask, Bmask, Amask);
    if (format == SDL_PIXELFORMAT_UNKNOWN) {
        SDL_SetError("Unknown pixel format");
        return NULL;
    }

    /* Allocate the surface */
    surface = (SDL_Surface *) SDL_calloc(1, sizeof(*surface));
    if (surface == NULL) {
        SDL_OutOfMemory();
        return NULL;
    }

    surface->format = SDL_AllocFormat(format);
    if (!surface->format) {
        SDL_FreeSurface(surface);
        return NULL;
    }
    surface->w = width;
    surface->h = height;
    surface->pitch = SDL_CalculatePitch(surface);
    SDL_SetClipRect(surface, NULL);

    if (SDL_ISPIXELFORMAT_INDEXED(surface->format->format)) {
        SDL_Palette *palette =
            SDL_AllocPalette((1 << surface->format->BitsPerPixel));
        if (!palette) {
            SDL_FreeSurface(surface);
            return NULL;
        }
        if (palette->ncolors == 2) {
            /* Create a black and white bitmap palette */
            palette->colors[0].r = 0xFF;
            palette->colors[0].g = 0xFF;
            palette->colors[0].b = 0xFF;
            palette->colors[1].r = 0x00;
            palette->colors[1].g = 0x00;
            palette->colors[1].b = 0x00;
        }
        SDL_SetSurfacePalette(surface, palette);
        SDL_FreePalette(palette);
    }

    /* Get the pixels */
    if (surface->w && surface->h) {
        surface->pixels = SDL_malloc(surface->h * surface->pitch);
        if (!surface->pixels) {
            SDL_FreeSurface(surface);
            SDL_OutOfMemory();
            return NULL;
        }
        /* This is important for bitmaps */
        SDL_memset(surface->pixels, 0, surface->h * surface->pitch);
    }

    /* Allocate an empty mapping */
    surface->map = SDL_AllocBlitMap();
    if (!surface->map) {
        SDL_FreeSurface(surface);
        return NULL;
    }

    /* By default surface with an alpha mask are set up for blending */
    if (Amask) {
        SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND);
    }

    /* The surface is ready to go */
    surface->refcount = 1;
    return surface;
}

SDL_Renderer *
GLES_CreateRenderer(SDL_Window * window, Uint32 flags)
{

    SDL_Renderer *renderer;
    GLES_RenderData *data;
    GLint value;
    Uint32 windowFlags;

    SDL_GL_SetAttribute(SDL_GL_CONTEXT_EGL, 1);
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 1);
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);

    windowFlags = SDL_GetWindowFlags(window);
    if (!(windowFlags & SDL_WINDOW_OPENGL)) {
        if (SDL_RecreateWindow(window, windowFlags | SDL_WINDOW_OPENGL) < 0) {
            /* Uh oh, better try to put it back... */
            SDL_RecreateWindow(window, windowFlags);
            return NULL;
        }
    }

    renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
    if (!renderer) {
        SDL_OutOfMemory();
        return NULL;
    }

    data = (GLES_RenderData *) SDL_calloc(1, sizeof(*data));
    if (!data) {
        GLES_DestroyRenderer(renderer);
        SDL_OutOfMemory();
        return NULL;
    }

    renderer->WindowEvent = GLES_WindowEvent;
    renderer->CreateTexture = GLES_CreateTexture;
    renderer->UpdateTexture = GLES_UpdateTexture;
    renderer->LockTexture = GLES_LockTexture;
    renderer->UnlockTexture = GLES_UnlockTexture;
    renderer->SetRenderTarget = GLES_SetRenderTarget;
    renderer->UpdateViewport = GLES_UpdateViewport;
    renderer->UpdateClipRect = GLES_UpdateClipRect;
    renderer->RenderClear = GLES_RenderClear;
    renderer->RenderDrawPoints = GLES_RenderDrawPoints;
    renderer->RenderDrawLines = GLES_RenderDrawLines;
    renderer->RenderFillRects = GLES_RenderFillRects;
    renderer->RenderCopy = GLES_RenderCopy;
    renderer->RenderCopyEx = GLES_RenderCopyEx;
    renderer->RenderReadPixels = GLES_RenderReadPixels;
    renderer->RenderPresent = GLES_RenderPresent;
    renderer->DestroyTexture = GLES_DestroyTexture;
    renderer->DestroyRenderer = GLES_DestroyRenderer;
    renderer->GL_BindTexture = GLES_BindTexture;
    renderer->GL_UnbindTexture = GLES_UnbindTexture;
    renderer->info = GLES_RenderDriver.info;
    renderer->info.flags = SDL_RENDERER_ACCELERATED;
    renderer->driverdata = data;
    renderer->window = window;

    data->context = SDL_GL_CreateContext(window);
    if (!data->context) {
        GLES_DestroyRenderer(renderer);
        return NULL;
    }
    if (SDL_GL_MakeCurrent(window, data->context) < 0) {
        GLES_DestroyRenderer(renderer);
        return NULL;
    }

    if (GLES_LoadFunctions(data) < 0) {
        GLES_DestroyRenderer(renderer);
        return NULL;
    }

    if (flags & SDL_RENDERER_PRESENTVSYNC) {
        SDL_GL_SetSwapInterval(1);
    } else {
        SDL_GL_SetSwapInterval(0);
    }
    if (SDL_GL_GetSwapInterval() > 0) {
        renderer->info.flags |= SDL_RENDERER_PRESENTVSYNC;
    }

#if SDL_VIDEO_DRIVER_PANDORA
    data->GL_OES_draw_texture_supported = SDL_FALSE;
    data->useDrawTexture = SDL_FALSE;
#else
    if (SDL_GL_ExtensionSupported("GL_OES_draw_texture")) {
        data->GL_OES_draw_texture_supported = SDL_TRUE;
        data->useDrawTexture = SDL_TRUE;
    } else {
        data->GL_OES_draw_texture_supported = SDL_FALSE;
        data->useDrawTexture = SDL_FALSE;
    }
#endif

    value = 0;
    data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
    renderer->info.max_texture_width = value;
//.........这里部分代码省略.........

static int
SNDMGR_OpenDevice(_THIS, const char *devname, int iscapture)
{
    SDL_AudioSpec *spec = &this->spec;
    SndChannelPtr channel = NULL;
    SndCallBackUPP callback;
    int sample_bits;
    int i;
    long initOptions;

    /* Initialize all variables that we clean on shutdown */
    this->hidden = (struct SDL_PrivateAudioData *)
        SDL_malloc((sizeof *this->hidden));
    if (this->hidden == NULL) {
        SDL_OutOfMemory();
        return 0;
    }
    SDL_memset(this->hidden, 0, (sizeof *this->hidden));

    /* !!! FIXME: iterate through format matrix... */
    /* Very few conversions are required, but... */
    switch (spec->format) {
    case AUDIO_S8:
        spec->format = AUDIO_U8;
        break;
    case AUDIO_U16LSB:
        spec->format = AUDIO_S16LSB;
        break;
    case AUDIO_U16MSB:
        spec->format = AUDIO_S16MSB;
        break;
    case AUDIO_F32LSB:
        spec->format = AUDIO_F32MSB;
        break;
    }
    SDL_CalculateAudioSpec(&this->spec);

    /* initialize bufferCmd header */
    SDL_memset(&header, 0, sizeof(header));
    callback = (SndCallBackUPP) NewSndCallBackUPP(callBackProc);
    sample_bits = spec->size / spec->samples / spec->channels * 8;

#ifdef DEBUG_AUDIO
    fprintf(stderr,
            "Audio format 0x%x, channels = %d, sample_bits = %d, frequency = %d\n",
            spec->format, spec->channels, sample_bits, spec->freq);
#endif /* DEBUG_AUDIO */

    header.numChannels = spec->channels;
    header.sampleSize = sample_bits;
    header.sampleRate = spec->freq << 16;
    header.numFrames = spec->samples;
    header.encode = cmpSH;

    /* Note that we install the 16bitLittleEndian Converter if needed. */
    if (spec->format == AUDIO_S16LSB) {
        header.compressionID = fixedCompression;
        header.format = k16BitLittleEndianFormat;
    } else if (spec->format == AUDIO_S32MSB) {
        header.compressionID = fixedCompression;
        header.format = k32BitFormat;
    } else if (spec->format == AUDIO_S32LSB) {
        header.compressionID = fixedCompression;
        header.format = k32BitLittleEndianFormat;
    } else if (spec->format == AUDIO_F32MSB) {
        header.compressionID = fixedCompression;
        header.format = kFloat32Format;
    }

    /* allocate 2 buffers */
    for (i = 0; i < 2; i++) {
        buffer[i] = (UInt8 *) SDL_malloc(sizeof(UInt8) * spec->size);
        if (buffer[i] == NULL) {
            SNDMGR_CloseDevice(this);
            SDL_OutOfMemory();
            return 0;
        }
        SDL_memset(buffer[i], 0, spec->size);
    }

    /* Create the sound manager channel */
    channel = (SndChannelPtr) SDL_malloc(sizeof(*channel));
    if (channel == NULL) {
        SNDMGR_CloseDevice(this);
        SDL_OutOfMemory();
        return 0;
    }
    this->hidden->channel = channel;
    if (spec->channels >= 2) {
        initOptions = initStereo;
    } else {
        initOptions = initMono;
    }
    channel->userInfo = (long) this;
    channel->qLength = 128;
    if (SndNewChannel(&channel, sampledSynth, initOptions, callback) != noErr) {
        SNDMGR_CloseDevice(this);
        SDL_SetError("Unable to create audio channel");
        return 0;
    }
//.........这里部分代码省略.........

static int
COREAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
{
    AudioStreamBasicDescription strdesc;
    SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
    int valid_datatype = 0;

    /* Initialize all variables that we clean on shutdown */
    this->hidden = (struct SDL_PrivateAudioData *)
        SDL_malloc((sizeof *this->hidden));
    if (this->hidden == NULL) {
        return SDL_OutOfMemory();
    }
    SDL_memset(this->hidden, 0, (sizeof *this->hidden));

    /* Setup a AudioStreamBasicDescription with the requested format */
    SDL_memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription));
    strdesc.mFormatID = kAudioFormatLinearPCM;
    strdesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
    strdesc.mChannelsPerFrame = this->spec.channels;
    strdesc.mSampleRate = this->spec.freq;
    strdesc.mFramesPerPacket = 1;

    while ((!valid_datatype) && (test_format)) {
        this->spec.format = test_format;
        /* Just a list of valid SDL formats, so people don't pass junk here. */
        switch (test_format) {
        case AUDIO_U8:
        case AUDIO_S8:
        case AUDIO_U16LSB:
        case AUDIO_S16LSB:
        case AUDIO_U16MSB:
        case AUDIO_S16MSB:
        case AUDIO_S32LSB:
        case AUDIO_S32MSB:
        case AUDIO_F32LSB:
        case AUDIO_F32MSB:
            valid_datatype = 1;
            strdesc.mBitsPerChannel = SDL_AUDIO_BITSIZE(this->spec.format);
            if (SDL_AUDIO_ISBIGENDIAN(this->spec.format))
                strdesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;

            if (SDL_AUDIO_ISFLOAT(this->spec.format))
                strdesc.mFormatFlags |= kLinearPCMFormatFlagIsFloat;
            else if (SDL_AUDIO_ISSIGNED(this->spec.format))
                strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
            break;
        }
    }

    if (!valid_datatype) {      /* shouldn't happen, but just in case... */
        COREAUDIO_CloseDevice(this);
        return SDL_SetError("Unsupported audio format");
    }

    strdesc.mBytesPerFrame =
        strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
    strdesc.mBytesPerPacket =
        strdesc.mBytesPerFrame * strdesc.mFramesPerPacket;

    if (!prepare_audiounit(this, handle, iscapture, &strdesc)) {
        COREAUDIO_CloseDevice(this);
        return -1;      /* prepare_audiounit() will call SDL_SetError()... */
    }

    return 0;   /* good to go. */
}

static Cursor
X11_CreatePixmapCursor(SDL_Surface * surface, int hot_x, int hot_y)
{
    Display *display = GetDisplay();
    XColor fg, bg;
    Cursor cursor = None;
    Uint32 *ptr;
    Uint8 *data_bits, *mask_bits;
    Pixmap data_pixmap, mask_pixmap;
    int x, y;
    unsigned int rfg, gfg, bfg, rbg, gbg, bbg, fgBits, bgBits;
    unsigned int width_bytes = ((surface->w + 7) & ~7) / 8;

    data_bits = SDL_calloc(1, surface->h * width_bytes);
    mask_bits = SDL_calloc(1, surface->h * width_bytes);
    if (!data_bits || !mask_bits) {
        SDL_OutOfMemory();
        return None;
    }

    /* Code below assumes ARGB pixel format */
    SDL_assert(surface->format->format == SDL_PIXELFORMAT_ARGB8888);

    rfg = gfg = bfg = rbg = gbg = bbg = fgBits = bgBits = 0;
    for (y = 0; y < surface->h; ++y) {
        ptr = (Uint32 *)((Uint8 *)surface->pixels + y * surface->pitch);
        for (x = 0; x < surface->w; ++x) {
            int alpha = (*ptr >> 24) & 0xff;
            int red   = (*ptr >> 16) & 0xff;
            int green = (*ptr >> 8) & 0xff;
            int blue  = (*ptr >> 0) & 0xff;
            if (alpha > 25) {
                mask_bits[y * width_bytes + x / 8] |= (0x01 << (x % 8));

                if ((red + green + blue) > 0x40) {
                    fgBits++;
                    rfg += red;
                    gfg += green;
                    bfg += blue;
                    data_bits[y * width_bytes + x / 8] |= (0x01 << (x % 8));
                } else {
                    bgBits++;
                    rbg += red;
                    gbg += green;
                    bbg += blue;
                }
            }
            ++ptr;
        }
    }

    if (fgBits) {
        fg.red   = rfg * 257 / fgBits;
        fg.green = gfg * 257 / fgBits;
        fg.blue  = bfg * 257 / fgBits;
    }
    else fg.red = fg.green = fg.blue = 0;

    if (bgBits) {
        bg.red   = rbg * 257 / bgBits;
        bg.green = gbg * 257 / bgBits;
        bg.blue  = bbg * 257 / bgBits;
    }
    else bg.red = bg.green = bg.blue = 0;

    data_pixmap = XCreateBitmapFromData(display, DefaultRootWindow(display),
                                        (char*)data_bits,
                                        surface->w, surface->h);
    mask_pixmap = XCreateBitmapFromData(display, DefaultRootWindow(display),
                                        (char*)mask_bits,
                                        surface->w, surface->h);
    cursor = XCreatePixmapCursor(display, data_pixmap, mask_pixmap,
                                 &fg, &bg, hot_x, hot_y);
	XFreePixmap(display, data_pixmap);
	XFreePixmap(display, mask_pixmap);

    return cursor;
}

static SDL_VideoDevice *
X11_CreateDevice(int devindex)
{
    SDL_VideoDevice *device;
    SDL_VideoData *data;
    const char *display = NULL; /* Use the DISPLAY environment variable */

    if (!SDL_X11_LoadSymbols()) {
        return NULL;
    }

    /* Initialize all variables that we clean on shutdown */
    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
    if (!device) {
        SDL_OutOfMemory();
        return NULL;
    }
    data = (struct SDL_VideoData *) SDL_calloc(1, sizeof(SDL_VideoData));
    if (!data) {
        SDL_OutOfMemory();
        SDL_free(device);
        return NULL;
    }
    device->driverdata = data;

#if SDL_VIDEO_DRIVER_PANDORA
    device->gles_data = (struct SDL_PrivateGLESData *) SDL_calloc(1, sizeof(SDL_PrivateGLESData));
    if (!device->gles_data) {
        SDL_OutOfMemory();
        return NULL;
    }
#endif

    /* FIXME: Do we need this?
       if ( (SDL_strncmp(XDisplayName(display), ":", 1) == 0) ||
       (SDL_strncmp(XDisplayName(display), "unix:", 5) == 0) ) {
       local_X11 = 1;
       } else {
       local_X11 = 0;
       }
     */
    data->display = XOpenDisplay(display);
#if defined(__osf__) && defined(SDL_VIDEO_DRIVER_X11_DYNAMIC)
    /* On Tru64 if linking without -lX11, it fails and you get following message.
     * Xlib: connection to ":0.0" refused by server
     * Xlib: XDM authorization key matches an existing client!
     *
     * It succeeds if retrying 1 second later
     * or if running xhost +localhost on shell.
     */
    if (data->display == NULL) {
        SDL_Delay(1000);
        data->display = XOpenDisplay(display);
    }
#endif
    if (data->display == NULL) {
        SDL_free(device);
        SDL_SetError("Couldn't open X11 display");
        return NULL;
    }
#ifdef X11_DEBUG
    XSynchronize(data->display, True);
#endif

    /* Set the function pointers */
    device->VideoInit = X11_VideoInit;
    device->VideoQuit = X11_VideoQuit;
    device->GetDisplayModes = X11_GetDisplayModes;
    device->SetDisplayMode = X11_SetDisplayMode;
    device->SuspendScreenSaver = X11_SuspendScreenSaver;
    device->PumpEvents = X11_PumpEvents;

    device->CreateWindow = X11_CreateWindow;
    device->CreateWindowFrom = X11_CreateWindowFrom;
    device->SetWindowTitle = X11_SetWindowTitle;
    device->SetWindowIcon = X11_SetWindowIcon;
    device->SetWindowPosition = X11_SetWindowPosition;
    device->SetWindowSize = X11_SetWindowSize;
    device->ShowWindow = X11_ShowWindow;
    device->HideWindow = X11_HideWindow;
    device->RaiseWindow = X11_RaiseWindow;
    device->MaximizeWindow = X11_MaximizeWindow;
    device->MinimizeWindow = X11_MinimizeWindow;
    device->RestoreWindow = X11_RestoreWindow;
    device->SetWindowFullscreen = X11_SetWindowFullscreen;
    device->SetWindowGammaRamp = X11_SetWindowGammaRamp;
    device->SetWindowGrab = X11_SetWindowGrab;
    device->DestroyWindow = X11_DestroyWindow;
    device->CreateWindowFramebuffer = X11_CreateWindowFramebuffer;
    device->UpdateWindowFramebuffer = X11_UpdateWindowFramebuffer;
    device->DestroyWindowFramebuffer = X11_DestroyWindowFramebuffer;
    device->GetWindowWMInfo = X11_GetWindowWMInfo;

    device->shape_driver.CreateShaper = X11_CreateShaper;
    device->shape_driver.SetWindowShape = X11_SetWindowShape;
    device->shape_driver.ResizeWindowShape = X11_ResizeWindowShape;

#if SDL_VIDEO_OPENGL_GLX
    device->GL_LoadLibrary = X11_GL_LoadLibrary;
    device->GL_GetProcAddress = X11_GL_GetProcAddress;
//.........这里部分代码省略.........

static SDL_VideoDevice*
MIR_CreateDevice(int device_index)
{
    MIR_Data* mir_data;
    SDL_VideoDevice* device = NULL;

    if (!SDL_MIR_LoadSymbols()) {
        return NULL;
    }

    device = SDL_calloc(1, sizeof(SDL_VideoDevice));
    if (!device) {
        SDL_MIR_UnloadSymbols();
        SDL_OutOfMemory();
        return NULL;
    }

    mir_data = SDL_calloc(1, sizeof(MIR_Data));
    if (!mir_data) {
        SDL_free(device);
        SDL_MIR_UnloadSymbols();
        SDL_OutOfMemory();
        return NULL;
    }

    device->driverdata = mir_data;

    /* mirvideo */
    device->VideoInit        = MIR_VideoInit;
    device->VideoQuit        = MIR_VideoQuit;
    device->GetDisplayBounds = MIR_GetDisplayBounds;
    device->GetDisplayModes  = MIR_GetDisplayModes;
    device->SetDisplayMode   = MIR_SetDisplayMode;
    device->free             = MIR_DeleteDevice;

    /* miropengles */
    device->GL_SwapWindow      = MIR_GL_SwapWindow;
    device->GL_MakeCurrent     = MIR_GL_MakeCurrent;
    device->GL_CreateContext   = MIR_GL_CreateContext;
    device->GL_DeleteContext   = MIR_GL_DeleteContext;
    device->GL_LoadLibrary     = MIR_GL_LoadLibrary;
    device->GL_UnloadLibrary   = MIR_GL_UnloadLibrary;
    device->GL_GetSwapInterval = MIR_GL_GetSwapInterval;
    device->GL_SetSwapInterval = MIR_GL_SetSwapInterval;
    device->GL_GetProcAddress  = MIR_GL_GetProcAddress;

    /* mirwindow */
    device->CreateWindow        = MIR_CreateWindow;
    device->DestroyWindow       = MIR_DestroyWindow;
    device->GetWindowWMInfo     = MIR_GetWindowWMInfo;
    device->SetWindowFullscreen = MIR_SetWindowFullscreen;
    device->MaximizeWindow      = MIR_MaximizeWindow;
    device->MinimizeWindow      = MIR_MinimizeWindow;
    device->RestoreWindow       = MIR_RestoreWindow;

    device->CreateWindowFrom     = NULL;
    device->SetWindowTitle       = NULL;
    device->SetWindowIcon        = NULL;
    device->SetWindowPosition    = NULL;
    device->SetWindowSize        = NULL;
    device->SetWindowMinimumSize = NULL;
    device->SetWindowMaximumSize = NULL;
    device->ShowWindow           = NULL;
    device->HideWindow           = NULL;
    device->RaiseWindow          = NULL;
    device->SetWindowBordered    = NULL;
    device->SetWindowGammaRamp   = NULL;
    device->GetWindowGammaRamp   = NULL;
    device->SetWindowGrab        = NULL;
    device->OnWindowEnter        = NULL;

    /* mirframebuffer */
    device->CreateWindowFramebuffer  = MIR_CreateWindowFramebuffer;
    device->UpdateWindowFramebuffer  = MIR_UpdateWindowFramebuffer;
    device->DestroyWindowFramebuffer = MIR_DestroyWindowFramebuffer;

    device->shape_driver.CreateShaper      = MIR_CreateShaper;
    device->shape_driver.SetWindowShape    = MIR_SetWindowShape;
    device->shape_driver.ResizeWindowShape = MIR_ResizeWindowShape;

    device->PumpEvents = MIR_PumpEvents;

    device->SuspendScreenSaver = NULL;

    device->StartTextInput   = NULL;
    device->StopTextInput    = NULL;
    device->SetTextInputRect = NULL;

    device->HasScreenKeyboardSupport = NULL;
    device->ShowScreenKeyboard       = NULL;
    device->HideScreenKeyboard       = NULL;
    device->IsScreenKeyboardShown    = NULL;

    device->SetClipboardText = NULL;
    device->GetClipboardText = NULL;
    device->HasClipboardText = NULL;

    device->ShowMessageBox = NULL;

    return device;
//.........这里部分代码省略.........

SDL_TimerID
SDL_AddTimer(Uint32 interval, SDL_TimerCallback callback, void *param)
{
    SDL_TimerData *data = &SDL_timer_data;
    SDL_Timer *timer;
    SDL_TimerMap *entry;

    if (!data->active) {
        int status = 0;

        SDL_AtomicLock(&data->lock);
        if (!data->active) {
            status = SDL_TimerInit();
        }
        SDL_AtomicUnlock(&data->lock);

        if (status < 0) {
            return 0;
        }
    }

    SDL_AtomicLock(&data->lock);
    timer = data->freelist;
    if (timer) {
        data->freelist = timer->next;
    }
    SDL_AtomicUnlock(&data->lock);

    if (timer) {
        SDL_RemoveTimer(timer->timerID);
    } else {
        timer = (SDL_Timer *)SDL_malloc(sizeof(*timer));
        if (!timer) {
            SDL_OutOfMemory();
            return 0;
        }
    }
    timer->timerID = SDL_AtomicIncRef(&data->nextID);
    timer->callback = callback;
    timer->param = param;
    timer->interval = interval;
    timer->scheduled = SDL_GetTicks() + interval;
    timer->canceled = SDL_FALSE;

    entry = (SDL_TimerMap *)SDL_malloc(sizeof(*entry));
    if (!entry) {
        SDL_free(timer);
        SDL_OutOfMemory();
        return 0;
    }
    entry->timer = timer;
    entry->timerID = timer->timerID;

    SDL_LockMutex(data->timermap_lock);
    entry->next = data->timermap;
    data->timermap = entry;
    SDL_UnlockMutex(data->timermap_lock);

    /* Add the timer to the pending list for the timer thread */
    SDL_AtomicLock(&data->lock);
    timer->next = data->pending;
    data->pending = timer;
    SDL_AtomicUnlock(&data->lock);

    /* Wake up the timer thread if necessary */
    SDL_SemPost(data->sem);

    return entry->timerID;
}

static SDL_VideoDevice *
X11_CreateDevice(int devindex)
{
    SDL_VideoDevice *device;
    SDL_VideoData *data;
    const char *display = NULL; /* Use the DISPLAY environment variable */

    if (!SDL_X11_LoadSymbols()) {
        return NULL;
    }

    /* Need for threading gl calls. This is also required for the proprietary
        nVidia driver to be threaded. */
    X11_XInitThreads();

    /* Initialize all variables that we clean on shutdown */
    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
    if (!device) {
        SDL_OutOfMemory();
        return NULL;
    }
    data = (struct SDL_VideoData *) SDL_calloc(1, sizeof(SDL_VideoData));
    if (!data) {
        SDL_free(device);
        SDL_OutOfMemory();
        return NULL;
    }
    device->driverdata = data;

    data->global_mouse_changed = SDL_TRUE;

    /* FIXME: Do we need this?
       if ( (SDL_strncmp(X11_XDisplayName(display), ":", 1) == 0) ||
       (SDL_strncmp(X11_XDisplayName(display), "unix:", 5) == 0) ) {
       local_X11 = 1;
       } else {
       local_X11 = 0;
       }
     */
    data->display = X11_XOpenDisplay(display);
#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
    /* On some systems if linking without -lX11, it fails and you get following message.
     * Xlib: connection to ":0.0" refused by server
     * Xlib: XDM authorization key matches an existing client!
     *
     * It succeeds if retrying 1 second later
     * or if running xhost +localhost on shell.
     */
    if (data->display == NULL) {
        SDL_Delay(1000);
        data->display = X11_XOpenDisplay(display);
    }
#endif
    if (data->display == NULL) {
        SDL_free(device->driverdata);
        SDL_free(device);
        SDL_SetError("Couldn't open X11 display");
        return NULL;
    }
#ifdef X11_DEBUG
    X11_XSynchronize(data->display, True);
#endif

    /* Hook up an X11 error handler to recover the desktop resolution. */
    safety_net_triggered = SDL_FALSE;
    orig_x11_errhandler = X11_XSetErrorHandler(X11_SafetyNetErrHandler);

    /* Set the function pointers */
    device->VideoInit = X11_VideoInit;
    device->VideoQuit = X11_VideoQuit;
    device->ResetTouch = X11_ResetTouch;
    device->GetDisplayModes = X11_GetDisplayModes;
    device->GetDisplayBounds = X11_GetDisplayBounds;
    device->GetDisplayUsableBounds = X11_GetDisplayUsableBounds;
    device->GetDisplayDPI = X11_GetDisplayDPI;
    device->SetDisplayMode = X11_SetDisplayMode;
    device->SuspendScreenSaver = X11_SuspendScreenSaver;
    device->PumpEvents = X11_PumpEvents;

    device->CreateSDLWindow = X11_CreateWindow;
    device->CreateSDLWindowFrom = X11_CreateWindowFrom;
    device->SetWindowTitle = X11_SetWindowTitle;
    device->SetWindowIcon = X11_SetWindowIcon;
    device->SetWindowPosition = X11_SetWindowPosition;
    device->SetWindowSize = X11_SetWindowSize;
    device->SetWindowMinimumSize = X11_SetWindowMinimumSize;
    device->SetWindowMaximumSize = X11_SetWindowMaximumSize;
    device->GetWindowBordersSize = X11_GetWindowBordersSize;
    device->SetWindowOpacity = X11_SetWindowOpacity;
    device->SetWindowModalFor = X11_SetWindowModalFor;
    device->SetWindowInputFocus = X11_SetWindowInputFocus;
    device->ShowWindow = X11_ShowWindow;
    device->HideWindow = X11_HideWindow;
    device->RaiseWindow = X11_RaiseWindow;
    device->MaximizeWindow = X11_MaximizeWindow;
    device->MinimizeWindow = X11_MinimizeWindow;
    device->RestoreWindow = X11_RestoreWindow;
    device->SetWindowBordered = X11_SetWindowBordered;
    device->SetWindowResizable = X11_SetWindowResizable;
    device->SetWindowFullscreen = X11_SetWindowFullscreen;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
    case BI_BITFIELDS:
        break;  /* we handled this in the info header. */

    default:
        SDL_SetError("Compressed BMP files not supported");
        was_error = SDL_TRUE;
        goto done;
    }

    /* Create a compatible surface, note that the colors are RGB ordered */
    surface =
        SDL_CreateRGBSurface(0, biWidth, biHeight, biBitCount, Rmask, Gmask,
                             Bmask, Amask);
    if (surface == NULL) {
        was_error = SDL_TRUE;
        goto done;
    }

    /* Load the palette, if any */
    palette = (surface->format)->palette;
    if (palette) {
        SDL_assert(biBitCount <= 8);
        if (biClrUsed == 0) {
            biClrUsed = 1 << biBitCount;
        }
        if ((int) biClrUsed > palette->ncolors) {
            SDL_Color *colors;
            int ncolors = biClrUsed;
            colors =
                (SDL_Color *) SDL_realloc(palette->colors,
                                          ncolors *
                                          sizeof(*palette->colors));
            if (!colors) {
                SDL_OutOfMemory();
                was_error = SDL_TRUE;
                goto done;
            }
            palette->ncolors = ncolors;
            palette->colors = colors;
        } else if ((int) biClrUsed < palette->ncolors) {
            palette->ncolors = biClrUsed;
        }
        if (biSize == 12) {
            for (i = 0; i < (int) biClrUsed; ++i) {
                SDL_RWread(src, &palette->colors[i].b, 1, 1);
                SDL_RWread(src, &palette->colors[i].g, 1, 1);
                SDL_RWread(src, &palette->colors[i].r, 1, 1);
                palette->colors[i].a = SDL_ALPHA_OPAQUE;
            }
        } else {
            for (i = 0; i < (int) biClrUsed; ++i) {
                SDL_RWread(src, &palette->colors[i].b, 1, 1);
                SDL_RWread(src, &palette->colors[i].g, 1, 1);
                SDL_RWread(src, &palette->colors[i].r, 1, 1);
                SDL_RWread(src, &palette->colors[i].a, 1, 1);

                /* According to Microsoft documentation, the fourth element
                   is reserved and must be zero, so we shouldn't treat it as
                   alpha.
                */
                palette->colors[i].a = SDL_ALPHA_OPAQUE;
            }
        }
    }

    /* Read the surface pixels.  Note that the bmp image is upside down */