C++ (Cpp) gegl_tile_entry_newの例

コード例 #1

ファイル: gegl-tile-backend-file.c プロジェクト: AjayRamanathan/gegl

static inline GeglBufferTile *
gegl_tile_backend_file_lookup_entry (GeglTileBackendFile *self,
              gint                 x,
              gint                 y,
              gint                 z)
{
  GeglBufferTile *ret;
  GeglBufferTile *key = gegl_tile_entry_new (x,y,z);
  ret = g_hash_table_lookup (self->index, key);
  gegl_tile_entry_destroy (key);
  return ret;
}

コード例 #2

ファイル: gegl-tile-backend-file.c プロジェクト: AjayRamanathan/gegl

static inline GeglBufferTile *
gegl_tile_backend_file_file_entry_new (GeglTileBackendFile *self)
{
  GeglBufferTile *entry = gegl_tile_entry_new (0,0,0);

  GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "Creating new entry");

  gegl_tile_backend_file_ensure_exist (self);

  if (self->free_list)
    {
      /* XXX: losing precision ?
       * the free list seems to operate with fixed size datums and
       * only keep track of offsets.
       */
      gint offset = GPOINTER_TO_INT (self->free_list->data);
      entry->offset = offset;
      self->free_list = g_slist_remove (self->free_list, self->free_list->data);

      GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "  set offset %i from free list", ((gint)entry->offset));
    }
  else
    {
      gint tile_size = gegl_tile_backend_get_tile_size (GEGL_TILE_BACKEND (self));

      entry->offset = self->next_pre_alloc;
      GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "  set offset %i (next allocation)", (gint)entry->offset);
      self->next_pre_alloc += tile_size;

      if (self->next_pre_alloc >= self->total) /* automatic growing ensuring that
                                                  we have room for next allocation..
                                                */
        {
          self->total = self->total + 32 * tile_size;

          GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "growing file to %i bytes", (gint)self->total);

          ftruncate (self->o, self->total);
          self->foffset = -1;
        }
    }
  gegl_tile_backend_file_dbg_alloc (gegl_tile_backend_get_tile_size (GEGL_TILE_BACKEND (self)));
  return entry;
}

コード例 #3

ファイル: gegl-tile-backend-file.c プロジェクト: jcupitt/gegl-vips

static inline GeglBufferTile *
gegl_tile_backend_file_file_entry_new (GeglTileBackendFile *self)
{
  GeglBufferTile *entry = gegl_tile_entry_new (0,0,0);

  GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "Creating new entry");

  gegl_tile_backend_file_ensure_exist (self);

  if (self->free_list)
    {
      /* XXX: losing precision ? */
      gint offset = GPOINTER_TO_INT (self->free_list->data);
      entry->offset = offset;
      self->free_list = g_slist_remove (self->free_list, self->free_list->data);

      GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "  set offset %i from free list", ((gint)entry->offset));
    }
  else
    {
      gint tile_size = gegl_tile_backend_get_tile_size (GEGL_TILE_BACKEND (self));

      entry->offset = self->next_pre_alloc;
      GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "  set offset %i (next allocation)", (gint)entry->offset);
      self->next_pre_alloc += tile_size;

      if (self->next_pre_alloc >= self->total)
        {
          self->total = self->total + 32 * tile_size;

          GEGL_NOTE (GEGL_DEBUG_TILE_BACKEND, "growing file to %i bytes", (gint)self->total);

#if HAVE_GIO
          g_assert (g_seekable_truncate (G_SEEKABLE (self->o),
                                         self->total, NULL,NULL));
#else
          g_assert (ftruncate (self->o, self->total) == 0);
#endif
        }
    }
  gegl_tile_backend_file_dbg_alloc (gegl_tile_backend_get_tile_size (GEGL_TILE_BACKEND (self)));
  return entry;
}