Ejemplo n.º 1
0
DFBResult
dfb_layer_region_get_surface( CoreLayerRegion  *region,
                              CoreSurface     **ret_surface )
{
     D_ASSERT( region != NULL );
     D_ASSERT( ret_surface != NULL );

     /* Lock the region. */
     if (dfb_layer_region_lock( region ))
          return DFB_FUSION;

     D_ASSUME( region->surface != NULL );

     /* Check for NULL surface. */
     if (!region->surface) {
          dfb_layer_region_unlock( region );
          return DFB_UNSUPPORTED;
     }

     /* Increase the surface's reference counter. */
     if (dfb_surface_ref( region->surface )) {
          dfb_layer_region_unlock( region );
          return DFB_FUSION;
     }

     /* Return the surface. */
     *ret_surface = region->surface;

     /* Unlock the region. */
     dfb_layer_region_unlock( region );

     return DFB_OK;
}
Ejemplo n.º 2
0
DFBResult
dfb_layer_region_disable( CoreLayerRegion *region )
{
     DFBResult ret;

     D_ASSERT( region != NULL );

     /* Lock the region. */
     if (dfb_layer_region_lock( region ))
          return DFB_FUSION;

     D_ASSUME( D_FLAGS_IS_SET( region->state, CLRSF_ENABLED ) );

     if (! D_FLAGS_IS_SET( region->state, CLRSF_ENABLED )) {
          dfb_layer_region_unlock( region );
          return DFB_OK;
     }

     /* Unrealize the region if it's active. */
     if (D_FLAGS_IS_SET( region->state, CLRSF_ACTIVE )) {
          ret = unrealize_region( region );
          if (ret)
               return ret;
     }

     /* Update the region's state. */
     D_FLAGS_CLEAR( region->state, CLRSF_ENABLED );

     /* Unlock the region. */
     dfb_layer_region_unlock( region );

     return DFB_OK;
}
Ejemplo n.º 3
0
DFBResult
dfb_layer_region_set_surface( CoreLayerRegion *region,
                              CoreSurface     *surface )
{
     DFBResult ret;

     D_ASSERT( region != NULL );
     D_ASSERT( surface != NULL );

     /* Lock the region. */
     if (dfb_layer_region_lock( region ))
          return DFB_FUSION;

     if (region->surface != surface) {
          /* Setup hardware for the new surface if the region is realized. */
          if (D_FLAGS_IS_SET( region->state, CLRSF_REALIZED )) {
               ret = set_region( region, &region->config, CLRCF_SURFACE | CLRCF_PALETTE, surface );
               if (ret) {
                    dfb_layer_region_unlock( region );
                    return ret;
               }
          }

          /* Throw away the old surface. */
          if (region->surface) {
               /* Detach the global listener. */
               dfb_surface_detach_global( region->surface,
                                          &region->surface_reaction );

               /* Unlink surface from structure. */
               dfb_surface_unlink( &region->surface );
          }

          /* Take the new surface. */
          if (surface) {
               /* Link surface into structure. */
               if (dfb_surface_link( &region->surface, surface )) {
                    D_WARN( "region lost it's surface" );
                    dfb_layer_region_unlock( region );
                    return DFB_FUSION;
               }

               /* Attach the global listener. */
               dfb_surface_attach_global( region->surface,
                                          DFB_LAYER_REGION_SURFACE_LISTENER,
                                          region, &region->surface_reaction );
          }
     }

     /* Unlock the region. */
     dfb_layer_region_unlock( region );

     return DFB_OK;
}
Ejemplo n.º 4
0
static void
handle_expose( const XExposeEvent *expose )
{
     CoreLayer               *layer = 0;
     const DisplayLayerFuncs *funcs = 0;
     CoreLayerContext        *context;
     int                      i;

     /* find the correct layer */
     for( i=0; i<dfb_layer_num(); i++ ) {
          X11LayerData *lds;

          layer = dfb_layer_at( i );
          lds   = (X11LayerData*)(layer->layer_data);
          if( lds->xw && (lds->xw->window == expose->window) )
               break;
     }

     /* layer not found? */
     if( i==dfb_layer_num() )
          return;

     funcs = layer->funcs;

     D_ASSERT( funcs != NULL );
     D_ASSERT( funcs->UpdateRegion != NULL );

     /* Get the currently active context. */
     if (dfb_layer_get_active_context( layer, &context ) == DFB_OK) {
          CoreLayerRegion *region;

          /* Get the first region. */
          if (dfb_layer_context_get_primary_region( context,
                                                    false, &region ) == DFB_OK)
          {
               /* Lock the region to avoid tearing due to concurrent updates. */
               dfb_layer_region_lock( region );

               /* Get the surface of the region. */
               if (region->surface && region->left_buffer_lock.buffer) {
                    DFBRegion update = { expose->x, expose->y,
                                         expose->x + expose->width  - 1,
                                         expose->y + expose->height - 1 };

                    funcs->UpdateRegion( layer, layer->driver_data, layer->layer_data,
                                         region->region_data, region->surface, &update, &region->left_buffer_lock, NULL, NULL );
               }

               /* Unlock the region. */
               dfb_layer_region_unlock( region );

               /* Release the region. */
               dfb_layer_region_unref( region );
          }

          /* Release the context. */
          dfb_layer_context_unref( context );
     }
}
Ejemplo n.º 5
0
DFBResult
dfb_layer_region_get_configuration( CoreLayerRegion       *region,
                                    CoreLayerRegionConfig *config )
{
     D_ASSERT( region != NULL );
     D_ASSERT( config != NULL );

     D_ASSERT( D_FLAGS_IS_SET( region->state, CLRSF_CONFIGURED ) );

     /* Lock the region. */
     if (dfb_layer_region_lock( region ))
          return DFB_FUSION;

     /* Return the current configuration. */
     *config = region->config;

     /* Unlock the region. */
     dfb_layer_region_unlock( region );

     return DFB_OK;
}
Ejemplo n.º 6
0
/*
 * listen to the layer's surface
 */
ReactionResult
_dfb_layer_region_surface_listener( const void *msg_data, void *ctx )
{
     CoreSurfaceNotificationFlags   flags;
     CoreSurface                   *surface;
     CoreLayer                     *layer;
     CoreLayerShared               *shared;
     DisplayLayerFuncs             *funcs;
     const CoreSurfaceNotification *notification = msg_data;
     CoreLayerRegion               *region       = ctx;

     D_ASSERT( notification != NULL );
     D_ASSERT( region != NULL );
     D_ASSERT( region->context != NULL );

     D_DEBUG_AT( Core_Layers, "_dfb_layer_region_surface_listener( %p, %p ) <- 0x%08x\n",
                 notification, region, notification->flags );

     D_ASSERT( notification->surface != NULL );

     D_ASSUME( notification->surface == region->surface );

     if (notification->surface != region->surface)
          return RS_OK;

     layer = dfb_layer_at( region->context->layer_id );

     D_ASSERT( layer != NULL );
     D_ASSERT( layer->funcs != NULL );
     D_ASSERT( layer->funcs->SetRegion != NULL );
     D_ASSERT( layer->shared != NULL );

     funcs   = layer->funcs;
     shared  = layer->shared;

     flags   = notification->flags;
     surface = notification->surface;

     if (flags & CSNF_DESTROY) {
          D_WARN( "layer region surface destroyed" );
          region->surface = NULL;
          return RS_REMOVE;
     }

     if (dfb_layer_region_lock( region ))
          return RS_OK;

     if (D_FLAGS_ARE_SET( region->state, CLRSF_REALIZED | CLRSF_CONFIGURED )) {
          if (D_FLAGS_IS_SET( flags, CSNF_PALETTE_CHANGE | CSNF_PALETTE_UPDATE )) {
               if (surface->palette)
                    funcs->SetRegion( layer,
                                      layer->driver_data, layer->layer_data,
                                      region->region_data, &region->config,
                                      CLRCF_PALETTE, surface, surface->palette );
          }

          if ((flags & CSNF_FIELD) && funcs->SetInputField)
               funcs->SetInputField( layer,
                                     layer->driver_data, layer->layer_data,
                                     region->region_data, surface->field );

          if ((flags & CSNF_ALPHA_RAMP) && (shared->description.caps & DLCAPS_ALPHA_RAMP)) {
               region->config.alpha_ramp[0] = surface->alpha_ramp[0];
               region->config.alpha_ramp[1] = surface->alpha_ramp[1];
               region->config.alpha_ramp[2] = surface->alpha_ramp[2];
               region->config.alpha_ramp[3] = surface->alpha_ramp[3];

               funcs->SetRegion( layer,
                                 layer->driver_data, layer->layer_data,
                                 region->region_data, &region->config,
                                 CLRCF_ALPHA_RAMP, surface, surface->palette );
          }
     }

     dfb_layer_region_unlock( region );

     return RS_OK;
}
Ejemplo n.º 7
0
DFBResult
dfb_layer_region_set_configuration( CoreLayerRegion            *region,
                                    CoreLayerRegionConfig      *config,
                                    CoreLayerRegionConfigFlags  flags )
{
     DFBResult              ret;
     CoreLayer             *layer;
     DisplayLayerFuncs     *funcs;
     CoreLayerRegionConfig  new_config;

     D_ASSERT( region != NULL );
     D_ASSERT( region->context != NULL );
     D_ASSERT( config != NULL );
     D_ASSERT( config->buffermode != DLBM_WINDOWS );
     D_ASSERT( (flags == CLRCF_ALL) || (region->state & CLRSF_CONFIGURED) );

     D_ASSUME( flags != CLRCF_NONE );
     D_ASSUME( ! (flags & ~CLRCF_ALL) );

     layer = dfb_layer_at( region->context->layer_id );

     D_ASSERT( layer != NULL );
     D_ASSERT( layer->funcs != NULL );
     D_ASSERT( layer->funcs->TestRegion != NULL );

     funcs = layer->funcs;

     /* Lock the region. */
     if (dfb_layer_region_lock( region ))
          return DFB_FUSION;

     /* Full configuration supplied? */
     if (flags == CLRCF_ALL) {
          new_config = *config;
     }
     else {
          /* Use the current configuration. */
          new_config = region->config;

          /* Update each modified entry. */
          if (flags & CLRCF_WIDTH)
               new_config.width = config->width;

          if (flags & CLRCF_HEIGHT)
               new_config.height = config->height;

          if (flags & CLRCF_FORMAT)
               new_config.format = config->format;

          if (flags & CLRCF_SURFACE_CAPS)
               new_config.surface_caps = config->surface_caps;

          if (flags & CLRCF_BUFFERMODE)
               new_config.buffermode = config->buffermode;

          if (flags & CLRCF_OPTIONS)
               new_config.options = config->options;

          if (flags & CLRCF_SOURCE_ID)
               new_config.source_id = config->source_id;

          if (flags & CLRCF_SOURCE)
               new_config.source = config->source;

          if (flags & CLRCF_DEST)
               new_config.dest = config->dest;

          if (flags & CLRCF_OPACITY)
               new_config.opacity = config->opacity;

          if (flags & CLRCF_ALPHA_RAMP) {
               new_config.alpha_ramp[0] = config->alpha_ramp[0];
               new_config.alpha_ramp[1] = config->alpha_ramp[1];
               new_config.alpha_ramp[2] = config->alpha_ramp[2];
               new_config.alpha_ramp[3] = config->alpha_ramp[3];
          }

          if (flags & CLRCF_SRCKEY)
               new_config.src_key = config->src_key;

          if (flags & CLRCF_DSTKEY)
               new_config.dst_key = config->dst_key;

          if (flags & CLRCF_PARITY)
               new_config.parity = config->parity;
     }

     /* Check if the new configuration is supported. */
     ret = funcs->TestRegion( layer, layer->driver_data, layer->layer_data,
                              &new_config, NULL );
     if (ret) {
          dfb_layer_region_unlock( region );
          return ret;
     }

     /* Propagate new configuration to the driver if the region is realized. */
     if (D_FLAGS_IS_SET( region->state, CLRSF_REALIZED )) {
          ret = set_region( region, &new_config, flags, region->surface );
          if (ret) {
               dfb_layer_region_unlock( region );
               return ret;
          }
     }

     /* Update the region's current configuration. */
     region->config = new_config;

     /* Update the region's state. */
     D_FLAGS_SET( region->state, CLRSF_CONFIGURED );

     /* Unlock the region. */
     dfb_layer_region_unlock( region );

     return DFB_OK;
}
Ejemplo n.º 8
0
DFBResult
dfb_layer_region_flip_update( CoreLayerRegion     *region,
                              const DFBRegion     *update,
                              DFBSurfaceFlipFlags  flags )
{
     DFBResult          ret = DFB_OK;
     CoreLayer         *layer;
     CoreLayerContext  *context;
     CoreSurface       *surface;
     SurfaceBuffer     *buffer;
     DisplayLayerFuncs *funcs;

     if (update)
          D_DEBUG_AT( Core_Layers,
                      "dfb_layer_region_flip_update( %p, %p, 0x%08x ) <- [%d, %d - %dx%d]\n",
                      region, update, flags, DFB_RECTANGLE_VALS_FROM_REGION( update ) );
     else
          D_DEBUG_AT( Core_Layers,
                      "dfb_layer_region_flip_update( %p, %p, 0x%08x )\n", region, update, flags );


     D_ASSERT( region != NULL );
     D_ASSERT( region->context != NULL );

     /* Lock the region. */
     if (dfb_layer_region_lock( region ))
          return DFB_FUSION;

     D_ASSUME( region->surface != NULL );

     /* Check for NULL surface. */
     if (!region->surface) {
          D_DEBUG_AT( Core_Layers, "  -> No surface => no update!\n" );
          dfb_layer_region_unlock( region );
          return DFB_UNSUPPORTED;
     }

     context = region->context;
     surface = region->surface;
     buffer  = surface->back_buffer;
     layer   = dfb_layer_at( context->layer_id );

     D_ASSERT( layer->funcs != NULL );

     funcs = layer->funcs;

     /* Depending on the buffer mode... */
     switch (region->config.buffermode) {
          case DLBM_TRIPLE:
          case DLBM_BACKVIDEO:
               /* Check if simply swapping the buffers is possible... */
               if (!(flags & DSFLIP_BLIT) &&
                   (!update || (update->x1 == 0 &&
                                update->y1 == 0 &&
                                update->x2 == surface->width - 1 &&
                                update->y2 == surface->height - 1)))
               {
                    D_DEBUG_AT( Core_Layers, "  -> Going to swap buffers...\n" );

                    /* Use the driver's routine if the region is realized. */
                    if (D_FLAGS_IS_SET( region->state, CLRSF_REALIZED )) {
                         D_ASSUME( funcs->FlipRegion != NULL );

                         D_DEBUG_AT( Core_Layers, "  -> Waiting for pending writes...\n" );

                         if (buffer->video.access & VAF_HARDWARE_WRITE) {
                              dfb_gfxcard_wait_serial( &buffer->video.serial );

                              buffer->video.access &= ~VAF_HARDWARE_WRITE;
                         }

                         D_DEBUG_AT( Core_Layers, "  -> Flipping region using driver...\n" );

                         if (funcs->FlipRegion)
                              ret = funcs->FlipRegion( layer,
                                                       layer->driver_data,
                                                       layer->layer_data,
                                                       region->region_data,
                                                       surface, flags );
                    }
                    else {
                         D_DEBUG_AT( Core_Layers, "  -> Flipping region not using driver...\n" );

                         /* Just do the hardware independent work. */
                         dfb_surface_flip_buffers( surface, false );
                    }

                    break;
               }

               /* fall through */

          case DLBM_BACKSYSTEM:
               D_DEBUG_AT( Core_Layers, "  -> Going to copy portion...\n" );

               if ((flags & DSFLIP_WAITFORSYNC) == DSFLIP_WAITFORSYNC) {
                    D_DEBUG_AT( Core_Layers, "  -> Waiting for VSync...\n" );

                    dfb_layer_wait_vsync( layer );
               }

               D_DEBUG_AT( Core_Layers, "  -> Copying content from back to front buffer...\n" );

               /* ...or copy updated contents from back to front buffer. */
               dfb_back_to_front_copy( surface, update );

               if ((flags & DSFLIP_WAITFORSYNC) == DSFLIP_WAIT) {
                    D_DEBUG_AT( Core_Layers, "  -> Waiting for VSync...\n" );

                    dfb_layer_wait_vsync( layer );
               }

               /* fall through */

          case DLBM_FRONTONLY:
               /* Tell the driver about the update if the region is realized. */
               if (funcs->UpdateRegion && D_FLAGS_IS_SET( region->state, CLRSF_REALIZED )) {
                    D_DEBUG_AT( Core_Layers, "  -> Notifying driver about updated content...\n" );

                    ret = funcs->UpdateRegion( layer,
                                               layer->driver_data,
                                               layer->layer_data,
                                               region->region_data,
                                               surface, update );
               }
               break;

          default:
               D_BUG("unknown buffer mode");
               ret = DFB_BUG;
     }

     D_DEBUG_AT( Core_Layers, "  -> done.\n" );

     /* Unlock the region. */
     dfb_layer_region_unlock( region );

     return ret;
}
Ejemplo n.º 9
0
static void
handle_expose_Async( void *ctx,
                     void *ctx2 )
{
     DFBX11                  *x11    = ctx;
     DFBX11Shared            *shared = x11->shared;
     const XExposeEvent      *expose = ctx2;
     CoreLayer               *layer;
     CoreLayerContext        *context;
     int                      i;
     X11LayerData            *lds;

     D_DEBUG_AT( X11_Input, "%s( %d,%d-%dx%d )\n", __FUNCTION__, expose->x, expose->y, expose->width, expose->height );

     //D_INFO_LINE_MSG("handle_expose %d,%d-%dx%d", expose->x, expose->y, expose->width, expose->height);

     /* find the correct layer */
     for (i=0; i<shared->outputs; i++) {
          if (shared->output[i].xw && (shared->output[i].xw->window == expose->window))
               break;
     }

     /* layer not found? */
     if (i == shared->outputs)
          return;

     lds = shared->output[i].layers[0];

     layer = dfb_layer_at( lds->layer_id );
     D_ASSERT( layer != NULL );

     /* Get the currently active context. */
     if (dfb_layer_get_active_context( layer, &context ) == DFB_OK) {
          CoreLayerRegion *region;

          /* Get the first region. */
          if (dfb_layer_context_get_primary_region( context, false, &region ) == DFB_OK) {
               /* Lock the region. */
               dfb_layer_region_lock( region );

               /* Get the surface of the region. */
               if (region->surface && D_FLAGS_ARE_SET( region->state, CLRSF_REALIZED )) {
                    if (dfb_config->task_manager) {
                         DFBRegion update = { expose->x, expose->y,
                                              expose->x + expose->width  - 1,
                                              expose->y + expose->height - 1 };

                         /* Tell the driver about the update if the region is realized. */
                         D_DEBUG_AT( X11_Input, "  -> Issuing display task...\n" );

                         dfb_surface_lock( region->surface );

                         DisplayTask_Generate( region, &update, &update, DSFLIP_NONE, -1, NULL );

                         dfb_surface_unlock( region->surface );
                    }
                    else {
                         //if (lds->lock_left.buffer) {
                              DFBRegion update = { expose->x, expose->y,
                                                   expose->x + expose->width  - 1,
                                                   expose->y + expose->height - 1 };

                         //     dfb_x11_update_screen( x11, lds, &update, &update, &lds->lock_left, &lds->lock_right );
                         //}
                         dfb_x11_update_screen( x11, lds, &update, &update, NULL, NULL );
                    }
               }

               /* Unlock the region. */
               dfb_layer_region_unlock( region );

               /* Release the region. */
               dfb_layer_region_unref( region );
          }

          /* Release the context. */
          dfb_layer_context_unref( context );
     }
}
Ejemplo n.º 10
0
DFBResult
dfb_layer_region_flip_update( CoreLayerRegion     *region,
                              const DFBRegion     *update,
                              DFBSurfaceFlipFlags  flags )
{
     DFBResult                ret = DFB_OK;
     DFBRegion                rotated;
     CoreLayer               *layer;
     CoreLayerContext        *context;
     CoreSurface             *surface;
     const DisplayLayerFuncs *funcs;

     if (update)
          D_DEBUG_AT( Core_Layers,
                      "dfb_layer_region_flip_update( %p, %p, 0x%08x ) <- [%d, %d - %dx%d]\n",
                      region, update, flags, DFB_RECTANGLE_VALS_FROM_REGION( update ) );
     else
          D_DEBUG_AT( Core_Layers,
                      "dfb_layer_region_flip_update( %p, %p, 0x%08x )\n", region, update, flags );


     D_ASSERT( region != NULL );
     D_ASSERT( region->context != NULL );

     /* Lock the region. */
     if (dfb_layer_region_lock( region ))
          return DFB_FUSION;

     D_ASSUME( region->surface != NULL );

     /* Check for NULL surface. */
     if (!region->surface) {
          D_DEBUG_AT( Core_Layers, "  -> No surface => no update!\n" );
          dfb_layer_region_unlock( region );
          return DFB_UNSUPPORTED;
     }

     context = region->context;
     surface = region->surface;
     layer   = dfb_layer_at( context->layer_id );

     D_ASSERT( layer->funcs != NULL );

     funcs = layer->funcs;

     /* Unfreeze region? */
     if (D_FLAGS_IS_SET( region->state, CLRSF_FROZEN )) {
          D_FLAGS_CLEAR( region->state, CLRSF_FROZEN );

          if (D_FLAGS_IS_SET( region->state, CLRSF_REALIZED )) {
               ret = set_region( region, &region->config, CLRCF_ALL, surface );
               if (ret)
                    D_DERROR( ret, "Core/LayerRegion: set_region() in dfb_layer_region_flip_update() failed!\n" );
          }
          else if (D_FLAGS_ARE_SET( region->state, CLRSF_ENABLED | CLRSF_ACTIVE )) {
               ret = realize_region( region );
               if (ret)
                    D_DERROR( ret, "Core/LayerRegion: realize_region() in dfb_layer_region_flip_update() failed!\n" );
          }

          if (ret) {
               dfb_layer_region_unlock( region );
               return ret;
          }
     }

     /* Depending on the buffer mode... */
     switch (region->config.buffermode) {
          case DLBM_TRIPLE:
          case DLBM_BACKVIDEO:
               /* Check if simply swapping the buffers is possible... */
               if (!(flags & DSFLIP_BLIT) && !surface->rotation &&
                   (!update || (update->x1 == 0 &&
                                update->y1 == 0 &&
                                update->x2 == surface->config.size.w - 1 &&
                                update->y2 == surface->config.size.h - 1)))
               {
                    D_DEBUG_AT( Core_Layers, "  -> Going to swap buffers...\n" );

                    /* Use the driver's routine if the region is realized. */
                    if (D_FLAGS_IS_SET( region->state, CLRSF_REALIZED )) {
                         D_ASSUME( funcs->FlipRegion != NULL );

                         ret = region_buffer_lock( region, surface, CSBR_BACK );
                         if (ret) {
                              dfb_layer_region_unlock( region );
                              return ret;
                         }

                         D_DEBUG_AT( Core_Layers, "  -> Flipping region using driver...\n" );

                         if (funcs->FlipRegion)
                              ret = funcs->FlipRegion( layer,
                                                       layer->driver_data,
                                                       layer->layer_data,
                                                       region->region_data,
                                                       surface, flags, &region->surface_lock );

                         dfb_surface_unlock( surface );
                    }
                    else {
                         D_DEBUG_AT( Core_Layers, "  -> Flipping region not using driver...\n" );

                         /* Just do the hardware independent work. */
                         dfb_surface_lock( surface );
                         dfb_surface_flip( surface, false );
                         dfb_surface_unlock( surface );
                    }
                    break;
               }

               /* fall through */

          case DLBM_BACKSYSTEM:
               D_DEBUG_AT( Core_Layers, "  -> Going to copy portion...\n" );

               if ((flags & DSFLIP_WAITFORSYNC) == DSFLIP_WAITFORSYNC) {
                    D_DEBUG_AT( Core_Layers, "  -> Waiting for VSync...\n" );

                    dfb_layer_wait_vsync( layer );
               }

               D_DEBUG_AT( Core_Layers, "  -> Copying content from back to front buffer...\n" );

               /* ...or copy updated contents from back to front buffer. */
               dfb_back_to_front_copy_rotation( surface, update, surface->rotation );

               if ((flags & DSFLIP_WAITFORSYNC) == DSFLIP_WAIT) {
                    D_DEBUG_AT( Core_Layers, "  -> Waiting for VSync...\n" );

                    dfb_layer_wait_vsync( layer );
               }

               /* fall through */

          case DLBM_FRONTONLY:
               /* Tell the driver about the update if the region is realized. */
               if (funcs->UpdateRegion && D_FLAGS_IS_SET( region->state, CLRSF_REALIZED )) {
                    if (surface) {
                         CoreSurfaceAllocation *allocation;

                         allocation = region->surface_lock.allocation;
                         D_ASSERT( allocation != NULL );

                         /* If hardware has written or is writing... */
                         if (allocation->accessed[CSAID_GPU] & CSAF_WRITE) {
                              D_DEBUG_AT( Core_Layers, "  -> Waiting for pending writes...\n" );

                              /* ...wait for the operation to finish. */
                              if (!(flags & DSFLIP_PIPELINE))
                                   dfb_gfxcard_sync(); /* TODO: wait for serial instead */

                              allocation->accessed[CSAID_GPU] &= ~CSAF_WRITE;
                         }

                         dfb_surface_lock( surface );
                         dfb_surface_allocation_update( allocation, CSAF_READ );
                         dfb_surface_unlock( surface );
                    }

                    D_DEBUG_AT( Core_Layers, "  -> Notifying driver about updated content...\n" );

                    dfb_region_from_rotated( &rotated, update, &surface->config.size, surface->rotation );

                    ret = funcs->UpdateRegion( layer,
                                               layer->driver_data,
                                               layer->layer_data,
                                               region->region_data,
                                               surface, &rotated, &region->surface_lock );
               }
               break;

          default:
               D_BUG("unknown buffer mode");
               ret = DFB_BUG;
     }

     D_DEBUG_AT( Core_Layers, "  -> done.\n" );

     /* Unlock the region. */
     dfb_layer_region_unlock( region );

     return ret;
}