/*

 	SDL - Simple DirectMedia Layer

 	Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga

 	This library is free software; you can redistribute it and/or

 	modify it under the terms of the GNU Library General Public

 	License as published by the Free Software Foundation; either

 	version 2 of the License, or (at your option) any later version.

 	This library is distributed in the hope that it will be useful,

 	but WITHOUT ANY WARRANTY; without even the implied warranty of

 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 	Library General Public License for more details.

 	You should have received a copy of the GNU Library General Public

 	License along with this library; if not, write to the Free

 	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 	Sam Lantinga

 	slouken@libsdl.org

 */

 #ifdef SAVE_RCSID

 static char rcsid =

  "@(#) $Id$";

 #endif

 /* DirectFB video driver implementation.

 */

 #include <stdlib.h>

 #include <string.h>

 #include <stdio.h>

 #include <fcntl.h>

 #include <unistd.h>

 #include <sys/mman.h>

 #include <directfb.h>

 #include "SDL.h"

 #include "SDL_error.h"

 #include "SDL_video.h"

 #include "SDL_mouse.h"

 #include "SDL_sysvideo.h"

 #include "SDL_pixels_c.h"

 #include "SDL_events_c.h"

 #include "SDL_DirectFB_video.h"

 #include "SDL_DirectFB_events.h"

 /* Initialization/Query functions */

 static int DirectFB_VideoInit(_THIS, SDL_PixelFormat *vformat);

 static SDL_Rect **DirectFB_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);

 static SDL_Surface *DirectFB_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);

 static int DirectFB_SetColors(_THIS, int firstcolor, int ncolors,

 			 SDL_Color *colors);

 static void DirectFB_VideoQuit(_THIS);

 /* Hardware surface functions */

 static int DirectFB_AllocHWSurface(_THIS, SDL_Surface *surface);

 static int DirectFB_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color);

 static int DirectFB_LockHWSurface(_THIS, SDL_Surface *surface);

 static void DirectFB_UnlockHWSurface(_THIS, SDL_Surface *surface);

 static void DirectFB_FreeHWSurface(_THIS, SDL_Surface *surface);

 static int DirectFB_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst);

 static int DirectFB_HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,

                                 SDL_Surface *dst, SDL_Rect *dstrect);

 static int DirectFB_SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key);

 static int DirectFB_SetHWAlpha(_THIS, SDL_Surface *surface, Uint8 alpha);

 static int DirectFB_FlipHWSurface(_THIS, SDL_Surface *surface);

 /* Various screen update functions available */

 static void DirectFB_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);

 static void DirectFB_WindowedUpdate(_THIS, int numrects, SDL_Rect *rects);

 /* This is the rect EnumModes2 uses */

 struct DirectFBEnumRect {

 	SDL_Rect r;

 	struct DirectFBEnumRect* next;

 };

 static struct DirectFBEnumRect *enumlist = NULL;

 /* DirectFB driver bootstrap functions */

 static int DirectFB_Available(void)

 {

   return 1;

 }

 static void DirectFB_DeleteDevice(SDL_VideoDevice *device)

 {

   free(device->hidden);

   free(device);

 }

 static SDL_VideoDevice *DirectFB_CreateDevice(int devindex)

 {

   SDL_VideoDevice *device;

   /* Initialize all variables that we clean on shutdown */

   device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));

   if (device)

     {

       memset (device, 0, (sizeof *device));

       device->hidden = (struct SDL_PrivateVideoData *) malloc (sizeof (*device->hidden));

     }

   if (device == NULL  ||  device->hidden == NULL)

     {

       SDL_OutOfMemory();

       if (device)

         {

           free (device);

         }

       return(0);

     }

   memset (device->hidden, 0, sizeof (*device->hidden));

   /* Set the function pointers */

   device->VideoInit = DirectFB_VideoInit;

   device->ListModes = DirectFB_ListModes;

   device->SetVideoMode = DirectFB_SetVideoMode;

   device->SetColors = DirectFB_SetColors;

   device->UpdateRects = NULL;

   device->VideoQuit = DirectFB_VideoQuit;

   device->AllocHWSurface = DirectFB_AllocHWSurface;

   device->CheckHWBlit = DirectFB_CheckHWBlit;

   device->FillHWRect = DirectFB_FillHWRect;

   device->SetHWColorKey = DirectFB_SetHWColorKey;

   device->SetHWAlpha = DirectFB_SetHWAlpha;

   device->LockHWSurface = DirectFB_LockHWSurface;

   device->UnlockHWSurface = DirectFB_UnlockHWSurface;

   device->FlipHWSurface = DirectFB_FlipHWSurface;

   device->FreeHWSurface = DirectFB_FreeHWSurface;

   device->SetCaption = NULL;

   device->SetIcon = NULL;

   device->IconifyWindow = NULL;

   device->GrabInput = NULL;

   device->GetWMInfo = NULL;

   device->InitOSKeymap = DirectFB_InitOSKeymap;

   device->PumpEvents = DirectFB_PumpEvents;

   device->free = DirectFB_DeleteDevice;

   return device;

 }

 VideoBootStrap DirectFB_bootstrap = {

   "directfb", "DirectFB",

   DirectFB_Available, DirectFB_CreateDevice

 };

 static DFBSurfacePixelFormat GetFormatForBpp (int bpp, IDirectFBDisplayLayer *layer)

 {

   DFBDisplayLayerConfig dlc;

   int                   bytes = (bpp + 7) / 8;

   layer->GetConfiguration (layer, &dlc);

   if (bytes == DFB_BYTES_PER_PIXEL(dlc.pixelformat))

     return dlc.pixelformat;

   switch (bytes)

     {

     case 1:

       return DSPF_RGB332;

     case 2:

       return DSPF_RGB16;

     case 3:

       return DSPF_RGB24;

     case 4:

       return DSPF_RGB32;

     }

   return DSPF_UNKNOWN;

 }

 static DFBEnumerationResult EnumModesCallback (unsigned int  width,

                                                unsigned int  height,

                                                unsigned int  bpp,

                                                void         *data)

 {

   SDL_VideoDevice *this = (SDL_VideoDevice *)data;

   struct DirectFBEnumRect *enumrect;

   HIDDEN->nummodes++;

   enumrect = calloc(1, sizeof(struct DirectFBEnumRect));

   if (!enumrect)

     {

       SDL_OutOfMemory();

       return DFENUM_CANCEL;

     }

   enumrect->r.w  = width;

   enumrect->r.h  = height;

   enumrect->next = enumlist;

   enumlist = enumrect;

   return DFENUM_OK;

 }

 struct private_hwdata {

   IDirectFBSurface *surface;

 };

 void SetDirectFBerror (const char *function, DFBResult code)

 {

   const char *error = DirectFBErrorString (code);

   if (error)

     SDL_SetError("%s: %s", function, error);

   else

     SDL_SetError("Unknown error code from %s", function);

 }

 static DFBSurfacePixelFormat SDLToDFBPixelFormat (SDL_PixelFormat *format)

 {

   if (format->Rmask && format->Gmask && format->Bmask)

     {

       switch (format->BitsPerPixel)

         {

         case 16:

           if (format->Rmask == 0xF800 &&

               format->Gmask == 0x07E0 &&

               format->Bmask == 0x001F)

             return DSPF_RGB16;

           /* fall through */

         case 15:

           if (format->Rmask == 0x7C00 &&

               format->Gmask == 0x03E0 &&

               format->Bmask == 0x001F)

             return DSPF_RGB15;

           break;

         case 8:

           if (format->Rmask == 0xE0 &&

               format->Gmask == 0x1C &&

               format->Bmask == 0x03)

             return DSPF_RGB332;

           break;

         case 24:

           if (format->Rmask == 0xFF0000 &&

               format->Gmask == 0x00FF00 &&

               format->Bmask == 0x0000FF)

             return DSPF_RGB24;

           break;

         case 32:

           if (format->Rmask == 0xFF0000 &&

               format->Gmask == 0x00FF00 &&

               format->Bmask == 0x0000FF)

             {

               if (format->Amask == 0xFF000000)

                 return DSPF_ARGB;

               else

                 return DSPF_RGB32;

             }

           break;

         }

     }

   else

     {

       switch (format->BitsPerPixel)

 	{

         case 8:

           return DSPF_RGB332;

 	case 15:

 	  return DSPF_RGB15;

 	case 16:

 	  return DSPF_RGB16;

 	case 24:

 	  return DSPF_RGB24;

 	case 32:

 	  return DSPF_RGB32;

 	}

     }

   return DSPF_UNKNOWN;

 }

 static const __u8 lookup3to8[] = { 0x00, 0x24, 0x49, 0x6d, 0x92, 0xb6, 0xdb, 0xff };

 static const __u8 lookup2to8[] = { 0x00, 0x55, 0xaa, 0xff };

 static SDL_Palette *GenerateRGB332Palette()

 {

   int          i;

   SDL_Palette *palette;

   SDL_Color   *colors;

   palette = calloc (1, sizeof(SDL_Palette));

   if (!palette)

     {

       SDL_OutOfMemory();

       return NULL;

     }

   colors = calloc (256, sizeof(SDL_Color));

   if (!colors)

     {

       SDL_OutOfMemory();

       return NULL;

     }

   for (i=0; i<256; i++)

     {

       colors[i].r = lookup3to8[ i >> 5 ];

       colors[i].g = lookup3to8[ (i >> 2) & 7 ];

       colors[i].g = lookup2to8[ i & 3 ];

     }

   palette->ncolors = 256;

   palette->colors  = colors;

   return palette;

 }

 static int DFBToSDLPixelFormat (DFBSurfacePixelFormat pixelformat, SDL_PixelFormat *format)

 {

   format->Amask = format->Rmask = format->Gmask = format->Bmask = 0;

   format->BitsPerPixel = format->BytesPerPixel = 0;

   switch (pixelformat)

     {

     case DSPF_A8:

       format->Amask = 0x000000FF;

       break;

     case DSPF_RGB15:

       format->Rmask = 0x00007C00;

       format->Gmask = 0x000003E0;

       format->Bmask = 0x0000001F;

       break;

     case DSPF_RGB16:

       format->Rmask = 0x0000F800;

       format->Gmask = 0x000007E0;

       format->Bmask = 0x0000001F;

       break;

     case DSPF_ARGB:

       format->Amask = 0; /* apps don't seem to like that:  0xFF000000; */

       /* fall through */

     case DSPF_RGB24:

     case DSPF_RGB32:

       format->Rmask = 0x00FF0000;

       format->Gmask = 0x0000FF00;

       format->Bmask = 0x000000FF;

       break;

     case DSPF_RGB332:

       format->Rmask = 0x000000E0;

       format->Gmask = 0x0000001C;

       format->Bmask = 0x00000003;

       format->palette = GenerateRGB332Palette();

       break;

     default:

       return -1;

     }

   format->BitsPerPixel  = DFB_BYTES_PER_PIXEL(pixelformat) * 8;

   format->BytesPerPixel = DFB_BYTES_PER_PIXEL(pixelformat);

   return 0;

 }

 int DirectFB_VideoInit(_THIS, SDL_PixelFormat *vformat)

 {

   int                      i;

   DFBResult                ret;

   DFBCardCapabilities      caps;

   DFBDisplayLayerConfig    dlc;

   DFBSurfacePixelFormat    format;

   struct DirectFBEnumRect *rect;

   IDirectFB               *dfb    = NULL;

   IDirectFBDisplayLayer   *layer  = NULL;

   IDirectFBEventBuffer    *events = NULL;

   ret = DirectFBInit (NULL, NULL);

   if (ret)

     {

       SetDirectFBerror ("DirectFBInit", ret);

       goto error;

     }

   ret = DirectFBCreate (&dfb);

   if (ret)

     {

       SetDirectFBerror ("DirectFBCreate", ret);

       goto error;

     }

   ret = dfb->GetDisplayLayer (dfb, DLID_PRIMARY, &layer);

   if (ret)

     {

       SetDirectFBerror ("dfb->GetDisplayLayer", ret);

       goto error;

     }

   ret = dfb->CreateEventBuffer (dfb, DICAPS_ALL, &events);

   if (ret)

     {

       SetDirectFBerror ("dfb->CreateEventBuffer", ret);

       goto error;

     }

   layer->EnableCursor (layer, 1);

   /* Query layer configuration to determine the current mode and pixelformat */

   layer->GetConfiguration (layer, &dlc);

   /* FIXME: Returning RGB332 as the default mode doesn't work (everything is black) */

   if ((format = dlc.pixelformat) == DSPF_RGB332)

     format = DSPF_RGB16;

   if (DFBToSDLPixelFormat (format, vformat))

     {

       SDL_SetError ("Unsupported pixelformat");

       goto error;

     }

   /* Enumerate the available fullscreen modes */

   ret = dfb->EnumVideoModes (dfb, EnumModesCallback, this);

   if (ret)

     {

       SetDirectFBerror ("dfb->EnumVideoModes", ret);

       goto error;

     }

   HIDDEN->modelist = calloc (HIDDEN->nummodes + 1, sizeof(SDL_Rect *));

   if (!HIDDEN->modelist)

     {

       SDL_OutOfMemory();

       goto error;

     }

   for (i = 0, rect = enumlist; rect; ++i, rect = rect->next )

     {

       HIDDEN->modelist[i] = &rect->r;

     }

   HIDDEN->modelist[i] = NULL;

   /* Query card capabilities to get the video memory size */

   dfb->GetCardCapabilities (dfb, &caps);

   this->info.wm_available = 1;

   this->info.hw_available = 1;

   this->info.blit_hw      = 1;

   this->info.blit_hw_CC   = 1;

   this->info.blit_hw_A    = 1;

   this->info.blit_fill    = 1;

   this->info.video_mem    = caps.video_memory / 1024;

   HIDDEN->initialized = 1;

   HIDDEN->dfb         = dfb;

   HIDDEN->layer       = layer;

   HIDDEN->eventbuffer = events;

   return 0;

  error:

   if (events)

     events->Release (events);

   if (layer)

     layer->Release (layer);

   if (dfb)

     dfb->Release (dfb);

   return -1;

 }

 static SDL_Rect **DirectFB_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)

 {

   if (flags & SDL_FULLSCREEN)

     return HIDDEN->modelist;

   else

     if (SDLToDFBPixelFormat (format) != DSPF_UNKNOWN)

       return (SDL_Rect**) -1;

   return NULL;

 }

 static SDL_Surface *DirectFB_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags)

 {

   DFBResult             ret;

   DFBSurfaceDescription dsc;

   DFBSurfacePixelFormat pixelformat;

   fprintf (stderr, "SDL DirectFB_SetVideoMode: %dx%d@%d, flags: 0x%08x\n",

            width, height, bpp, flags);

   flags |= SDL_FULLSCREEN;

   /* Release previous primary surface */

   if (current->hwdata && current->hwdata->surface)

     {

       current->hwdata->surface->Release (current->hwdata->surface);

       current->hwdata->surface = NULL;

     }

   else if (!current->hwdata)

     {

       /* Allocate the hardware acceleration data */

       current->hwdata = (struct private_hwdata *) calloc (1, sizeof(*current->hwdata));

       if (!current->hwdata)

         {

           SDL_OutOfMemory();

           return NULL;

 	}

     }

   /* Set cooperative level depending on flag SDL_FULLSCREEN */

   if (flags & SDL_FULLSCREEN)

     {

       ret = HIDDEN->dfb->SetCooperativeLevel (HIDDEN->dfb, DFSCL_FULLSCREEN);

       if (ret)

         {

           DirectFBError ("dfb->SetCooperativeLevel", ret);

           flags &= ~SDL_FULLSCREEN;

         }

     }

   else

     HIDDEN->dfb->SetCooperativeLevel (HIDDEN->dfb, DFSCL_NORMAL);

   /* Set video mode */

   ret = HIDDEN->dfb->SetVideoMode (HIDDEN->dfb, width, height, bpp);

   if (ret)

     {

       if (flags & SDL_FULLSCREEN)

         {

           flags &= ~SDL_FULLSCREEN;

           HIDDEN->dfb->SetCooperativeLevel (HIDDEN->dfb, DFSCL_NORMAL);

           ret = HIDDEN->dfb->SetVideoMode (HIDDEN->dfb, width, height, bpp);

         }

       if (ret)

         {

           SetDirectFBerror ("dfb->SetVideoMode", ret);

           return NULL;

         }

     }

   /* Create primary surface */

   dsc.flags       = DSDESC_CAPS | DSDESC_PIXELFORMAT;

   dsc.caps        = DSCAPS_PRIMARY | ((flags & SDL_DOUBLEBUF) ? DSCAPS_FLIPPING : 0);

   dsc.pixelformat = GetFormatForBpp (bpp, HIDDEN->layer);

   ret = HIDDEN->dfb->CreateSurface (HIDDEN->dfb, &dsc, &current->hwdata->surface);

   if (ret && (flags & SDL_DOUBLEBUF))

     {

       /* Try without double buffering */

       dsc.caps &= ~DSCAPS_FLIPPING;

       ret = HIDDEN->dfb->CreateSurface (HIDDEN->dfb, &dsc, &current->hwdata->surface);

     }

   if (ret)

     {

       SetDirectFBerror ("dfb->CreateSurface", ret);

       current->hwdata->surface = NULL;

       return NULL;

     }

   current->w     = width;

   current->h     = height;

   current->flags = SDL_HWSURFACE | SDL_PREALLOC;

   if (flags & SDL_FULLSCREEN)

     {

       current->flags |= SDL_FULLSCREEN;

       this->UpdateRects = DirectFB_DirectUpdate;

     }

   else

     this->UpdateRects = DirectFB_WindowedUpdate;

   if (dsc.caps & DSCAPS_FLIPPING)

     current->flags |= SDL_DOUBLEBUF;

   current->hwdata->surface->GetPixelFormat (current->hwdata->surface, &pixelformat);

   DFBToSDLPixelFormat (pixelformat, current->format);

   return current;

 }

 static int DirectFB_AllocHWSurface(_THIS, SDL_Surface *surface)

 {

   DFBResult             ret;

   DFBSurfaceDescription dsc;

   /*  fprintf(stderr, "SDL: DirectFB_AllocHWSurface (%dx%d@%d, flags: 0x%08x)\n",

       surface->w, surface->h, surface->format->BitsPerPixel, surface->flags);*/

   if (surface->w < 8 || surface->h < 8)

     return -1;

   /* fill surface description */

   dsc.flags  = DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT | DSDESC_CAPS;

   dsc.width  = surface->w;

   dsc.height = surface->h;

   dsc.caps   = (surface->flags & SDL_DOUBLEBUF) ? DSCAPS_FLIPPING : 0;

   /* find the right pixelformat */

   dsc.pixelformat = SDLToDFBPixelFormat (surface->format);

   if (dsc.pixelformat == DSPF_UNKNOWN)

     return -1;

   /* Allocate the hardware acceleration data */

   surface->hwdata = (struct private_hwdata *) calloc (1, sizeof(*surface->hwdata));

   if (surface->hwdata == NULL)

     {

       SDL_OutOfMemory();

       return -1;

     }

   /* Create the surface */

   ret = HIDDEN->dfb->CreateSurface (HIDDEN->dfb, &dsc, &surface->hwdata->surface);

   if (ret)

     {

       SetDirectFBerror ("dfb->CreateSurface", ret);

       free (surface->hwdata);

       surface->hwdata = NULL;

       return -1;

     }

   surface->flags |= SDL_HWSURFACE | SDL_PREALLOC;

   return 0;

 }

 static void DirectFB_FreeHWSurface(_THIS, SDL_Surface *surface)

 {

   if (surface->hwdata && HIDDEN->initialized)

     {

       surface->hwdata->surface->Release (surface->hwdata->surface);

       free (surface->hwdata);

       surface->hwdata = NULL;

     }

 }

 static int DirectFB_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)

 {

   /*  fprintf(stderr, "SDL: DirectFB_CheckHWBlit (src->hwdata: %p, dst->hwdata: %p)\n",

       src->hwdata, dst->hwdata);*/

   if (!src->hwdata || !dst->hwdata)

     return 0;

   src->flags |= SDL_HWACCEL;

   src->map->hw_blit = DirectFB_HWAccelBlit;

   return 1;

 }

 static int DirectFB_HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,

                                 SDL_Surface *dst, SDL_Rect *dstrect)

 {

   DFBSurfaceBlittingFlags flags = DSBLIT_NOFX;

   DFBRectangle sr = { srcrect->x, srcrect->y, srcrect->w, srcrect->h };

   DFBRectangle dr = { dstrect->x, dstrect->y, dstrect->w, dstrect->h };

   IDirectFBSurface *surface = dst->hwdata->surface;

   if (src->flags & SDL_SRCCOLORKEY)

     {

       flags |= DSBLIT_SRC_COLORKEY;

       DirectFB_SetHWColorKey (NULL, src, src->format->colorkey);

     }

   if (src->flags & SDL_SRCALPHA)

     {

       flags |= DSBLIT_BLEND_COLORALPHA;

       surface->SetColor (surface, 0xff, 0xff, 0xff, src->format->alpha);

     }

   surface->SetBlittingFlags (surface, flags);

   if (sr.w == dr.w && sr.h == dr.h)

     surface->Blit (surface, src->hwdata->surface, &sr, dr.x, dr.y);

   else

     surface->StretchBlit (surface, src->hwdata->surface, &sr, &dr);

   return 0;

 }

 static int DirectFB_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color)

 {

   SDL_PixelFormat  *fmt     = dst->format;

   IDirectFBSurface *surface = dst->hwdata->surface;

   /* ugly */

   surface->SetColor (surface,

                      (color & fmt->Rmask) >> (fmt->Rshift - fmt->Rloss),

                      (color & fmt->Gmask) >> (fmt->Gshift - fmt->Gloss),

                      (color & fmt->Bmask) << (fmt->Bloss - fmt->Bshift), 0xFF);

   surface->FillRectangle (surface, dstrect->x, dstrect->y, dstrect->w, dstrect->h);

   return 0;

 }

 static int DirectFB_SetHWColorKey(_THIS, SDL_Surface *src, Uint32 key)

 {

   SDL_PixelFormat  *fmt     = src->format;

   IDirectFBSurface *surface = src->hwdata->surface;

   /* ugly */

   surface->SetSrcColorKey (surface,

                            (key & fmt->Rmask) >> (fmt->Rshift - fmt->Rloss),

                            (key & fmt->Gmask) >> (fmt->Gshift - fmt->Gloss),

                            (key & fmt->Bmask) << (fmt->Bloss - fmt->Bshift));

   return 0;

 }

 static int DirectFB_SetHWAlpha(_THIS, SDL_Surface *surface, Uint8 alpha)

 {

   return 0;

 }

 static int DirectFB_FlipHWSurface(_THIS, SDL_Surface *surface)

 {

   return surface->hwdata->surface->Flip (surface->hwdata->surface, NULL, DSFLIP_WAITFORSYNC);

 }

 static int DirectFB_LockHWSurface(_THIS, SDL_Surface *surface)

 {

   DFBResult  ret;

   void      *data;

   int        pitch;

   ret = surface->hwdata->surface->Lock (surface->hwdata->surface,

                                         DSLF_WRITE, &data, &pitch);

   if (ret)

     {

       SetDirectFBerror ("surface->Lock", ret);

       return -1;

     }

   surface->pixels = data;

   surface->pitch  = pitch;

   return 0;

 }

 static void DirectFB_UnlockHWSurface(_THIS, SDL_Surface *surface)

 {

   surface->hwdata->surface->Unlock (surface->hwdata->surface);

   surface->pixels = NULL;

 }

 static void DirectFB_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)

 {

 }

 static void DirectFB_WindowedUpdate(_THIS, int numrects, SDL_Rect *rects)

 {

   DFBRegion         region;

   int               i;

   int               region_valid = 0;

   IDirectFBSurface *surface = this->screen->hwdata->surface;

   for (i=0; i<numrects; ++i)

     {

       int x2, y2;

       if ( ! rects[i].w ) /* Clipped? */

         continue;

       x2 = rects[i].x + rects[i].w - 1;

       y2 = rects[i].y + rects[i].h - 1;

       if (region_valid)

         {

           if (rects[i].x < region.x1)

             region.x1 = rects[i].x;

           if (rects[i].y < region.y1)

             region.y1 = rects[i].y;

           if (x2 > region.x2)

             region.x2 = x2;

           if (y2 > region.y2)

             region.y2 = y2;

         }

       else

         {

             region.x1 = rects[i].x;

             region.y1 = rects[i].y;

             region.x2 = x2;

             region.y2 = y2;

             region_valid = 1;

         }

     }

   if (region_valid)

     surface->Flip (surface, &region, DSFLIP_WAITFORSYNC);

 }

 int DirectFB_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)

 {

   fprintf(stderr, "SDL: Unimplemented DirectFB_SetColors!\n");

   return -1;

 }

 void DirectFB_VideoQuit(_THIS)

 {

   struct DirectFBEnumRect *rect = enumlist;

   if (HIDDEN->eventbuffer)

     {

       HIDDEN->eventbuffer->Release (HIDDEN->eventbuffer);

       HIDDEN->eventbuffer = NULL;

     }

   if (HIDDEN->layer)

     {

       HIDDEN->layer->Release (HIDDEN->layer);

       HIDDEN->layer = NULL;

     }

   if (HIDDEN->dfb)

     {

       HIDDEN->dfb->Release (HIDDEN->dfb);

       HIDDEN->dfb = NULL;

     }

   /* Free video mode list */

   if (HIDDEN->modelist)

     {

       free (HIDDEN->modelist);

       HIDDEN->modelist = NULL;

     }

   /* Free mode enumeration list */

   while (rect)

     {

       struct DirectFBEnumRect *next = rect->next;

       free (rect);

       rect = next;

     }

   enumlist = NULL;

   HIDDEN->initialized = 0;

 }

 void DirectFB_FinalQuit(void) 

 {

 }