Пример #1
0
ILboolean iLoadMngInternal()
{
	mng_handle mng;

	if (iCurImage == NULL) {
		ilSetError(IL_ILLEGAL_OPERATION);
		return IL_FALSE;
	}

	mng = mng_initialize(MNG_NULL, mymngalloc, mymngfree, MNG_NULL);
	if (mng == MNG_NULL) {
		ilSetError(IL_LIB_MNG_ERROR);
		return IL_FALSE;
	}

	// If .mng background is available, use it.
	mng_set_usebkgd(mng, MNG_TRUE);

	// Set the callbacks.
	mng_setcb_errorproc(mng, mymngerror);
    mng_setcb_openstream(mng, mymngopenstream);
    mng_setcb_closestream(mng, mymngclosestream);
    mng_setcb_readdata(mng, (mng_readdata)mymngreadstream);
	mng_setcb_gettickcount(mng, mymnggetticks);
	mng_setcb_settimer(mng, mymngsettimer);
	mng_setcb_processheader(mng, mymngprocessheader);
	mng_setcb_getcanvasline(mng, mymnggetcanvasline);
	mng_setcb_refresh(mng, mymngrefresh);

	mng_read(mng);
	mng_display(mng);

	return ilFixImage();
}
Пример #2
0
bool
CMNGAnimation::Load(const char* filename, IFileSystem& fs)
{
  this->~CMNGAnimation();

  // open the file
  m_file = fs.Open(filename, IFileSystem::read);
  if (m_file == NULL) {
    return false;
  }

  // initialize MNG playback
  m_stream = mng_initialize(this, CB_Allocate, CB_Free, NULL);

  // set all of the callbacks
  mng_setcb_openstream(m_stream, CB_OpenStream);
  mng_setcb_closestream(m_stream, CB_CloseStream);
  mng_setcb_readdata(m_stream, CB_ReadData);
  mng_setcb_processheader(m_stream, CB_ProcessHeader);
  mng_setcb_gettickcount(m_stream, CB_GetTickCount);
  mng_setcb_getcanvasline(m_stream, CB_GetCanvasLine);
  mng_setcb_refresh(m_stream, CB_Refresh);
  mng_setcb_settimer(m_stream, CB_SetTimer);

  // do some reading
  if (mng_read(m_stream) != MNG_NOERROR) {
    return false;
  }

  return true;
}
Пример #3
0
/**
**  Load a MNG
**
**  @param name  Name of the MNG file
*/
int Mng::Load(const char *name)
{
	mng_retcode myretcode;
	char buf[PATH_MAX];

	LibraryFileName(name, buf, sizeof(buf));

	this->name = new_strdup(buf);
	handle = mng_initialize(this, my_alloc, my_free, MNG_NULL);
	if (handle == MNG_NULL) {
		return -1;
	}
	mng_setcb_openstream(handle, my_openstream);
	mng_setcb_closestream(handle, my_closestream);
	mng_setcb_readdata(handle, my_readdata);
	mng_setcb_processheader(handle, my_processheader);
	mng_setcb_processmend(handle, my_processmend);
	mng_setcb_getcanvasline(handle, my_getcanvasline);
	mng_setcb_refresh(handle, my_refresh);
	mng_setcb_gettickcount(handle, my_gettickcount);
	mng_setcb_settimer(handle, my_settimer);
	mng_setcb_errorproc(handle, my_errorproc);

	mng_read(handle);
	if (surface && iteration != 0x7fffffff) {
		myretcode = mng_display(handle);
	}

	if (!surface || iteration == 0x7fffffff) {
		return -1;
	}
	return 0;
}
Пример #4
0
/**
**  Load a MNG
**
**  @param name  Name of the MNG file
*/
int Mng::Load(const std::string &name)
{
	this->name = LibraryFileName(name.c_str());
	handle = mng_initialize(this, my_alloc, my_free, MNG_NULL);
	if (handle == MNG_NULL) {
		return -1;
	}
	mng_setcb_openstream(handle, my_openstream);
	mng_setcb_closestream(handle, my_closestream);
	mng_setcb_readdata(handle, my_readdata);
	mng_setcb_processheader(handle, my_processheader);
	mng_setcb_processmend(handle, my_processmend);
	mng_setcb_getcanvasline(handle, my_getcanvasline);
	mng_setcb_refresh(handle, my_refresh);
	mng_setcb_gettickcount(handle, my_gettickcount);
	mng_setcb_settimer(handle, my_settimer);
	mng_setcb_errorproc(handle, my_errorproc);

	mng_read(handle);
	if (surface && iteration != 0x7fffffff) {
		mng_display(handle);
	}

	if (!surface || iteration == 0x7fffffff) {
		return -1;
	}
	return 0;
}
Пример #5
0
static gboolean
gtk_mng_view_init_libmng (GtkMngView * mng_view)
{
    FUNCTION_ENTRY();
  GtkWidget * widget;

  g_return_val_if_fail (IS_GTK_MNG_VIEW (mng_view), FALSE);

  if (mng_view->MNG_handle)
    mng_cleanup (&mng_view->MNG_handle);

  mng_view->MNG_handle = mng_initialize (mng_view,
					 mng_malloc_callback,
					 mng_free_callback,
					 MNG_NULL);

  if (mng_view->MNG_handle == MNG_NULL) {
      FUNCTION_EXIT();
    return FALSE;
  }

  mng_set_storechunks(mng_view->MNG_handle, MNG_TRUE);
  //mng_set_dfltimggamma(mng_view->MNG_handle, 5);
  //mng_set_displaygamma(mng_view->MNG_handle, 4);
  if (mng_setcb_openstream (mng_view->MNG_handle, mng_open_stream_callback) != MNG_NOERROR ||
      mng_setcb_closestream (mng_view->MNG_handle, mng_close_stream_callback) != MNG_NOERROR ||
      mng_setcb_readdata (mng_view->MNG_handle, mng_read_data_callback) != MNG_NOERROR ||
      mng_setcb_processheader (mng_view->MNG_handle, mng_process_header_callback) != MNG_NOERROR ||
      mng_setcb_processmend (mng_view->MNG_handle, mng_process_mend_callback) != MNG_NOERROR ||
      mng_setcb_processterm (mng_view->MNG_handle, mng_process_term_callback) != MNG_NOERROR ||
      mng_setcb_settimer (mng_view->MNG_handle, mng_set_timer_callback) != MNG_NOERROR ||
      mng_setcb_gettickcount (mng_view->MNG_handle, mng_get_tickcount_callback) != MNG_NOERROR ||
      mng_setcb_getcanvasline (mng_view->MNG_handle, mng_get_canvas_line_callback) != MNG_NOERROR ||
      mng_setcb_getalphaline (mng_view->MNG_handle, mng_get_alpha_line_callback) != MNG_NOERROR ||
      mng_setcb_refresh (mng_view->MNG_handle, mng_refresh_callback) != MNG_NOERROR)
    {
      mng_cleanup (&mng_view->MNG_handle);
      FUNCTION_EXIT();
      return FALSE;
    }

      //mng_set_suspensionmode(mng_view->MNG_handle, MNG_TRUE);
  mng_set_canvasstyle (mng_view->MNG_handle, MNG_CANVAS_RGB8_A8);

  widget = GTK_WIDGET (mng_view);

  if (!GTK_WIDGET_REALIZED (widget))
    gtk_widget_realize (widget);

  mng_set_bgcolor (mng_view->MNG_handle,
		   widget->style->bg[GTK_STATE_NORMAL].red,
		   widget->style->bg[GTK_STATE_NORMAL].green,
		   widget->style->bg[GTK_STATE_NORMAL].blue);
  FUNCTION_EXIT();
  return TRUE;
}
Пример #6
0
// return 1 if okay
static int my_init_mng(PluginInstance *This)
{
	mng_retcode rv;
	int err;

	This->mng = mng_initialize((mng_ptr)This,memallocfunc,memfreefunc,NULL);
	//(mng_memalloc)  (mng_memfree)

#ifdef MNGPLG_CMS
	init_color_management(This);
#endif

	err=0;
	rv=mng_setcb_openstream    (This->mng, callback_openstream   ); if(rv) err++;
	rv=mng_setcb_closestream   (This->mng, callback_closestream  ); if(rv) err++;
	rv=mng_setcb_readdata      (This->mng, callback_readdata     ); if(rv) err++;
	rv=mng_setcb_processheader (This->mng, callback_processheader); if(rv) err++;
	rv=mng_setcb_getcanvasline (This->mng, callback_getcanvasline); if(rv) err++;
	rv=mng_setcb_refresh       (This->mng, callback_refresh      ); if(rv) err++;
	rv=mng_setcb_gettickcount  (This->mng, callback_gettickcount ); if(rv) err++;
	rv=mng_setcb_settimer      (This->mng, callback_settimer     ); if(rv) err++;
	rv=mng_setcb_processtext   (This->mng, callback_processtext  ); if(rv) err++;

#ifdef MNGPLG_TRACE
	rv=mng_setcb_traceproc     (This->mng, callback_traceproc    ); if(rv) err++;
#endif
	if(err) {
		warn(This,"Error setting libmng callback functions");
		return 0;
	}

	rv= mng_set_suspensionmode (This->mng,MNG_TRUE);
	if(rv) {
		warn(This,"Error setting suspension mode");
		return 0;
	}

	// if the web page author provided a bgcolor, use it
	if(This->force_bgcolor) {
		rv=mng_set_bgcolor (This->mng, This->bg_r, This->bg_g, This->bg_b);
	}

#ifdef MNGPLG_TRACE
	fprintf(tracefile,"initial readdisplay\n");
#endif

	handle_read_error(This, mng_readdisplay(This->mng) );
	return 1;
}
Пример #7
0
bool ImageJngFile::Load (uint8 *iBuffer, size_t iSize)
{
  mng_retcode retcode;

  const int magicSize = 8;
  const char magicMNG[] = "\x8aMNG\x0d\x0a\x1a\x0a";
  const char magicJNG[] = "\x8bJNG\x0d\x0a\x1a\x0a";

  // check for magic JNG/MNG bytes. If not correct, we can skip
  // messing around w/ libmng entirely.
  if ((iSize < 8) || 
    ((memcmp ((void*)iBuffer, (void*)&magicMNG, magicSize)) &&
     (memcmp ((void*)iBuffer, (void*)&magicJNG, magicSize))))
  {
    return false;
  }

  handle = mng_initialize (mng_ptr(this), cb_alloc, 
                           cb_free, MNG_NULL);
  if (!handle)
  {
    Report (object_reg, CS_REPORTER_SEVERITY_WARNING,
      "failed to initialize libmng");
    return false;
  }

  buffer = iBuffer;
  bufptr = buffer;
  bufferSize = iSize;

  if ((mng_setcb_openstream (handle, cb_openstream) != MNG_NOERROR) ||
      (mng_setcb_closestream (handle, cb_closestream) != MNG_NOERROR) ||
      (mng_setcb_readdata (handle, cb_readdata) != MNG_NOERROR) ||
      (mng_setcb_processheader(handle, cb_processheader) != MNG_NOERROR) ||
      (mng_setcb_getcanvasline(handle, cb_getcanvasline) != MNG_NOERROR) ||
      (mng_setcb_refresh(handle, cb_imagerefresh) != MNG_NOERROR) ||
      (mng_setcb_gettickcount(handle, cb_gettickcount) != MNG_NOERROR) ||
      (mng_setcb_settimer(handle, cb_settimer) != MNG_NOERROR))
  {
    ReportLibmngError (object_reg, handle, "failed to set libmng callbacks");
    mng_cleanup (&handle);
    return false;
  }

  retcode = mng_read (handle);
  if (retcode != MNG_NOERROR)
  {
    if (retcode != MNG_INVALIDSIG) // maybe its just not an jng/mng...
      ReportLibmngError (object_reg, handle, "failed to read data");
    mng_cleanup (&handle);
    return false;
  }

  // Don't read PNGs 
  if (mng_get_sigtype (handle) == mng_it_png)
  {
    delete[] NewImage;
    mng_cleanup (&handle);
    return false;
  }

  // Even on still images, libmng issues timer requests.
  // so, as long as the requests are 'immediate' we continue
  // displaying. If a delay is requested we end loading.
  timer = 2;
  retcode = mng_display (handle);
  while ((retcode == MNG_NEEDTIMERWAIT) && (timer <= 1))
  {
    retcode = mng_display_resume (handle);
  }
  if ((retcode != MNG_NOERROR) && (retcode != MNG_NEEDTIMERWAIT))
  {
    ReportLibmngError (object_reg, handle, "failed to display data");
    mng_cleanup (&handle);
    return false;
  }
  doWait = (retcode == MNG_NEEDTIMERWAIT);
  animated = doWait;

  if (NewImage)
  {
    csRGBpixel *rgbImage = 
      csPackRGBA::CopyUnpackRGBAtoRGBpixel (NewImage, Width*Height);
    ConvertFromRGBA (rgbImage);
    // Subsequent images may contain alpha, so don't check
    if (!doWait) CheckAlpha();
  }

  if (mng_get_sigtype (handle) != mng_it_mng)
  {
    delete[] NewImage; NewImage = 0;
    mng_cleanup (&handle);
    handle = 0;
  }

  return true;
}
Пример #8
0
static FIBITMAP * DLL_CALLCONV
Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) {
	mng_handle hmng = NULL;

	if (handle != NULL) {
		try {
			// allocate our stream data structure
			mngstuff *mymng = (mngstuff *)data;

			// set up the mng decoder for our stream
			hmng = mng_initialize(mymng, mymngalloc, mymngfree, MNG_NULL);

			if (hmng == MNG_NULL) {
				throw "could not initialize libmng";			
			}
			
			// set the colorprofile, lcms uses this
			mng_set_srgb(hmng, MNG_TRUE );
			// set white as background color
			WORD wRed, wGreen, wBlue;
			wRed = wGreen = wBlue = (255 << 8) + 255;
			mng_set_bgcolor(hmng, wRed, wGreen, wBlue);
			// if PNG Background is available, use it
			mng_set_usebkgd(hmng, MNG_TRUE );
			// no need to store chunks
			mng_set_storechunks(hmng, MNG_FALSE);
			// no need to wait: straight reading
			mng_set_suspensionmode(hmng, MNG_FALSE);

			// set the callbacks
			mng_setcb_errorproc(hmng, mymngerror);
			mng_setcb_openstream(hmng, mymngopenstream);
			mng_setcb_closestream(hmng, mymngclosestream);
			mng_setcb_readdata(hmng, mymngreadstream);
			mng_setcb_processheader(hmng, mymngprocessheader);
			mng_setcb_getcanvasline(hmng, mymnggetcanvasline);
			mng_setcb_refresh(hmng, mymngrefresh);
			mng_setcb_gettickcount(hmng, mymnggetticks);
			mng_setcb_settimer(hmng, mymngsettimer);
	
			// read in the bitmap
			mng_readdisplay(hmng);

			// read all bitmaps
			int retval = MNG_NOERROR;
			mng_datap pData = (mng_datap)hmng;
			while(pData->bReading) {
				retval = mng_display_resume(hmng);
				if((retval == MNG_NEEDTIMERWAIT) || (retval == MNG_FUNCTIONINVALID))
					break;
			}

			// temp store the newly created bitmap
			FIBITMAP *bitmap = mymng->bitmap;

			// cleanup and return the temp stored bitmap
			mng_cleanup(&hmng);

			return bitmap;

		} catch (const char *message) {
			FIBITMAP *bitmap = ((mngstuff *)mng_get_userdata(hmng))->bitmap;
			if(bitmap) {
				FreeImage_Unload(bitmap);
			}
			mng_cleanup(&hmng);
			FreeImage_OutputMessageProc(s_format_id, message);
		}
	}

	return NULL;
}	
Пример #9
0
/**
 * \brief MPlayer callback: Open MNG stream.
 * \param[in] demuxer demuxer structure
 * \return demuxer structure on success, \p NULL on error
 */
static demuxer_t * demux_mng_open(demuxer_t * demuxer)
{
    mng_priv_t * mng_priv;
    mng_handle h_mng;
    mng_retcode mng_ret;
    sh_video_t * sh_video;

    // create private data structure
    mng_priv = calloc(1, sizeof(mng_priv_t));

    //stream pointer into private data
    mng_priv->stream = demuxer->stream;

    // initialize MNG image instance
    h_mng = mng_initialize((mng_ptr)mng_priv, demux_mng_alloc,
                           demux_mng_free, MNG_NULL);
    if (!h_mng) {
        mp_msg(MSGT_DEMUX, MSGL_ERR,
               "demux_mng: could not initialize MNG image instance\n");
        free(mng_priv);
        return NULL;
    }

    // MNG image handle into private data
    mng_priv->h_mng = h_mng;

    // set required MNG callbacks
    if (mng_setcb_openstream(h_mng, demux_mng_openstream) ||
        mng_setcb_closestream(h_mng, demux_mng_closestream) ||
        mng_setcb_readdata(h_mng, demux_mng_readdata) ||
        mng_setcb_processheader(h_mng, demux_mng_processheader) ||
        mng_setcb_getcanvasline(h_mng, demux_mng_getcanvasline) ||
        mng_setcb_refresh(h_mng, demux_mng_refresh) ||
        mng_setcb_gettickcount(h_mng, demux_mng_gettickcount) ||
        mng_setcb_settimer(h_mng, demux_mng_settimer) ||
        mng_set_canvasstyle(h_mng, MNG_CANVAS_RGBA8)) {
        mp_msg(MSGT_DEMUX, MSGL_ERR,
               "demux_mng: could not set MNG callbacks\n");
        mng_cleanup(&h_mng);
        free(mng_priv);
        return NULL;
    }

    // start reading MNG data
    mng_ret = mng_read(h_mng);
    if (mng_ret) {
        mp_msg(MSGT_DEMUX, MSGL_ERR,
               "demux_mng: could not start reading MNG data: "
               "mng_retcode %d\n", mng_ret);
        mng_cleanup(&h_mng);
        free(mng_priv);
        return NULL;
    }

    // check that MNG header is processed now
    if (!mng_priv->header_processed) {
        mp_msg(MSGT_DEMUX, MSGL_ERR,
               "demux_mng: internal error: header not processed\n");
        mng_cleanup(&h_mng);
        free(mng_priv);
        return NULL;
    }

    // create a new video stream header
    sh_video = new_sh_video(demuxer, 0);

    // Make sure the demuxer knows about the new video stream header
    // (even though new_sh_video() ought to take care of it).
    // (Thanks to demux_gif.c for this.)
    demuxer->video->sh = sh_video;

    // Make sure that the video demuxer stream header knows about its
    // parent video demuxer stream (this is getting wacky), or else
    // video_read_properties() will choke.
    // (Thanks to demux_gif.c for this.)
    sh_video->ds = demuxer->video;

    // set format of pixels in video packets
    sh_video->format = mmioFOURCC(32, 'B', 'G', 'R');

    // set framerate to some value (MNG does not have a fixed framerate)
    sh_video->fps       = 5.0f;
    sh_video->frametime = 1.0f / sh_video->fps;

    // set video frame parameters
    sh_video->bih                = malloc(sizeof(*sh_video->bih));
    sh_video->bih->biCompression = sh_video->format;
    sh_video->bih->biWidth       = mng_priv->width;
    sh_video->bih->biHeight      = mng_priv->height;
    sh_video->bih->biBitCount    = 32;
    sh_video->bih->biPlanes      = 1;

    // Set start time to something > 0.
    //  - This is required for the variable frame time mechanism
    //    (GIF, MATROSKA, MNG) in video.c to work for the first frame.
    sh_video->ds->pts = MNG_START_PTS;

    // set private data in demuxer and return demuxer
    demuxer->priv = mng_priv;
    return demuxer;
}
Пример #10
0
static bool sReadMNG(Stream &stream, GBitmap *bitmap)
{
   PROFILE_SCOPE(sReadMNG);
   mngstuff mnginfo;
   dMemset(&mnginfo, 0, sizeof(mngstuff));

   mng_handle mng = mng_initialize(&mnginfo, mngMallocFn, mngFreeFn, MNG_NULL);
   if(mng == NULL)
      return false;
   
   // setup the callbacks
   mng_setcb_errorproc(mng, mngFatalErrorFn);
   mng_setcb_openstream(mng, mngOpenDataFn);
   mng_setcb_closestream(mng, mngCloseDataFn);
   mng_setcb_readdata(mng, mngReadDataFn);
   mng_setcb_processheader(mng, mngProcessHeaderFn);
   mng_setcb_getcanvasline(mng, mngCanvasLineFn);
   mng_setcb_refresh(mng, mngRefreshFn);
   mng_setcb_gettickcount(mng, mngGetTicksFn);
   mng_setcb_settimer(mng, mngSetTimerFn);
   
   mnginfo.image = bitmap;
   mnginfo.stream = &stream;
   
   mng_read(mng);
   mng_display(mng);

   // hacks :(
   // libmng doesn't support returning data in gray/gray alpha format, 
   // so we grab as RGB/RGBA and just cut off the g and b
   mng_uint8 colorType = mng_get_colortype(mng);
   switch(colorType)
   {
      case MNG_COLORTYPE_GRAY:
      case MNG_COLORTYPE_JPEGGRAY:
         {
            GBitmap temp(*bitmap);
            bitmap->deleteImage();
            bitmap->allocateBitmap(temp.getWidth(), temp.getHeight(), false, GFXFormatA8);
            
            // force getColor to read in in the same color value for each channel
            // since the gray colortype has the real alpha in the first channel
            temp.setFormat( GFXFormatA8 );

            ColorI color;
            for(U32 row = 0; row < bitmap->getHeight(); row++)
            {
               for(U32 col = 0; col < bitmap->getWidth(); col++)
               {
                  temp.getColor(col, row, color);
                  bitmap->setColor(col, row, color);
               }
            }
         }

         break;
   }

   mng_cleanup(&mng);

   // Check this bitmap for transparency
   bitmap->checkForTransparency();

   return true;
}
Пример #11
0
int main(int argc, char *argv[])
{
	int fbdev,c,option_index;
	unsigned int alpha;
	struct fb_var_screeninfo var;

	/* Check which console we're running on */
	init_consoles();
		
	/* allocate our stream data structure */
	mng = (mngstuff *) calloc(1, sizeof(*mng));
	if (mng == NULL) {
		fprintf(stderr, "could not allocate stream structure.\n");
		exit(0);
	}
	alpha = 100;
	mng->alpha = 100;
	mng->fbx = 15;
	mng->fby = 15;
	mng->background = NULL;

	while (1) {
		static struct option long_options[] = {
			{"help", 0, 0, 'h'},
			{"verbose", 0, 0, 'v'},
			{"alpha", 1, 0, 'a'},
			{"buffered", 0, 0, 'b'},
			{"signal", 0, 0, 's'},
			{"delta", 0, 0, 'd'},
			{"position", 0, 0, 'p'},
			{"version", 0, 0, 'V'},
			{"start-console",0,0,'S'},
			{"console",1,0,'c'},
			{0, 0, 0, 0}
		};

		c = getopt_long(argc, argv, "a:x:y:bh?vsd:pVSc:",
				long_options, &option_index);

		if (c == -1)
			break;

		switch (c) {
		case 'a':
			alpha = atoi(optarg);
			if (alpha > 100)
				alpha = 100;
			mng->alpha = alpha;
			break;
		case 'x':
			mng->fbx = atoi(optarg);
			break;
		case 'y':
			mng->fby = atoi(optarg);
			break;
		case 'd':
			delta = atoi(optarg);
			break;
		case '?':
		case 'h':
			usage(argv[0]);
			exit(0);
		case 'v':
			verbose = 1;
			break;
		case 's':
			waitsignal = 1;
			break;
		case 'b':
			buffered = 1;
			break;
		case 'p':
			dynpos = 1;
			break;
		case 'V':
			version();
			exit(0);
		case 'c':
			start_console=atoi(optarg);
		case 'S':
			sconly=1;
			break;
		default:
			break;
		}
	}

	if (optind >= argc) {
		printf("Which files do you want to play?\n");
		exit(0);
	}

	//init_consoles();
	
	/* Initialize framebuffer */
	fbdev = open("/dev/fb0", O_RDWR);
	if (fbdev < 0) {
		fprintf(stderr, "error while opening framebuffer.\n");
		exit(fbdev);
	}

	ioctl(fbdev, FBIOGET_VSCREENINFO, &var);
	mng->fbwidth = var.xres;
	mng->fbheight = var.yres;
	mng->fbbpp = var.bits_per_pixel;

	mng->display =
	    mmap(NULL, var.xres * var.yres * (var.bits_per_pixel >> 3),
		 PROT_WRITE | PROT_READ, MAP_SHARED, fbdev, 0);

	/* arrange to call the shutdown routine before we exit */
	atexit(&cleanup);

	while (optind < argc) {
		// leftover arguements are filenames.
		mng->filename = argv[optind++];

		/* set up the mng decoder for our stream */
		mng->mng = mng_initialize(mng, mngalloc, mngfree, MNG_NULL);
		if (mng->mng == MNG_NULL) {
			fprintf(stderr, "could not initialize libmng.\n");
			exit(1);
		}

		/* set the callbacks */
		mng_setcb_errorproc(mng->mng, mngerror);
		mng_setcb_openstream(mng->mng, mngopenstream);
		mng_setcb_closestream(mng->mng, mngclosestream);
		mng_setcb_readdata(mng->mng, mngreadstream);
		mng_setcb_gettickcount(mng->mng, mnggetticks);
		mng_setcb_settimer(mng->mng, mngsettimer);
		mng_setcb_processheader(mng->mng, mngprocessheader);
		mng_setcb_getcanvasline(mng->mng, mnggetcanvasline);
		mng_setcb_refresh(mng->mng, mngrefresh);
		/* FIXME: should check for errors here */

		signal(SIGINT, sigint_handler);
		signal(SIGTERM, sigterm_handler);

		mng_readdisplay(mng->mng);

		/* loop though the frames */
		while (mng->delay && run) {
			mdelay(mng->delay);
			mng->delay = 0;
			mng_display_resume(mng->mng);
			if (run == 2) {
				if (mng->alpha == 0)
					run = 0;
				mng->alpha -= delta;
				if (mng->alpha < 0)
					mng->alpha = 0;
			}
		}

		if (waitsignal && optind < argc) {
			signal(SIGUSR1, sigusr1_handler);
			run = 1;
			while (run) {
				sleep(2);
			}
		}

		memset(mng->copybuffer, 0,
		       4 * mng->width * mng->height);
		run = 1;
		mng->alpha = alpha;
		if (optind == argc) {	/* last file */
			restore_area();
		}
	}

	/* cleanup and quit */
	return mngquit(mng->mng);
}