Class: Gegl::TileBackend

Inherits:

TileSource

• Object
• TileSource
• Gegl::TileBackend

Defined in:

(unknown)

Class Method Summary

• .unlink_swap(path) ⇒ nil

  Delete a swap file from disk.

Instance Method Summary

• #command(command, x, y, z, data) ⇒ GObject

  The default tile-backend command handler.

• #extent ⇒ Gegl::Rectangle
• #extent=(rectangle) ⇒ nil

  Specify the extent of the backend, can be used to pre-prime the backend with the width/height information when constructing proxy GeglBuffers to interact with other systems.

• #flush_on_destroy ⇒ Boolean
• #flush_on_destroy=(flush_on_destroy) ⇒ Boolean
• #flush_on_destroy? ⇒ Boolean

  Flush-on-destroy.

• #format ⇒ GObject

  Format.

• #format=(format) ⇒ GObject
• #peek_storage ⇒ Gegl::TileSource

  Gets a pointer to the GeglTileStorage that uses the backend.

• #px_size ⇒ Integer

  Px-size.

• #px_size=(px_size) ⇒ Integer
• #tile_height ⇒ Integer

  Tile-height.

• #tile_height=(tile_height) ⇒ Integer
• #tile_size ⇒ Integer

  Tile-size.

• #tile_size=(tile_size) ⇒ Integer
• #tile_width ⇒ Integer

  Tile-width.

• #tile_width=(tile_width) ⇒ Integer

Class Method Details

.unlink_swap(path) ⇒ nil

Delete a swap file from disk. This must be used by tile backends which may
swap to disk under certain circonstances.

For safety, this function will check that the swap file is in the swap
directory before deletion but it won't perform any other check.

Parameters:

• path (String) —

  the path where the gegl tile backend has swapped.

Returns:

• (nil)

Instance Method Details

#command(command, x, y, z, data) ⇒ GObject

The default tile-backend command handler. Tile backends should forward
commands they don't handle themselves to this function.

Parameters:

• command (Gegl::TileCommand) —

  the tile command

• x (Integer) —

  x coordinate

• y (Integer) —

  y coordinate

• z (Integer) —

  tile zoom level

• data (GObject) —

  user data

Returns:

• (GObject) —

  Command result.

#extent ⇒ Gegl::Rectangle

Returns:

• (Gegl::Rectangle)

#extent=(rectangle) ⇒ nil

Specify the extent of the backend, can be used to pre-prime the
backend with the width/height information when constructing proxy
GeglBuffers to interact with other systems

Parameters:

• rectangle (Gegl::Rectangle) —

  the new extent

Returns:

• (nil)

#flush_on_destroy ⇒ Boolean

Returns:

• (Boolean)

#flush_on_destroy=(flush_on_destroy) ⇒ Boolean

Parameters:

• flush_on_destroy (Boolean)

Returns:

• (Boolean) —

  flush-on-destroy

• (Boolean) —

  flush-on-destroy

#flush_on_destroy? ⇒ Boolean

Returns flush-on-destroy.

Returns:

• (Boolean) —

  flush-on-destroy

#format ⇒ GObject

Returns format.

Returns:

• (GObject) —

  format

#format=(format) ⇒ GObject

Parameters:

• format (GObject)

Returns:

• (GObject) —

  format

• (GObject) —

  format

#peek_storage ⇒ Gegl::TileSource

Gets a pointer to the GeglTileStorage that uses the backend

Returns:

• (Gegl::TileSource) —

  the Gegl::TileStorage

#px_size ⇒ Integer

Returns px-size.

Returns:

• (Integer) —

  px-size

#px_size=(px_size) ⇒ Integer

Parameters:

• px_size (Integer)

Returns:

• (Integer) —

  px-size

• (Integer) —

  px-size

#tile_height ⇒ Integer

Returns tile-height.

Returns:

• (Integer) —

  tile-height

#tile_height=(tile_height) ⇒ Integer

Parameters:

• tile_height (Integer)

Returns:

• (Integer) —

  tile-height

• (Integer) —

  tile-height

#tile_size ⇒ Integer

Returns tile-size.

Returns:

• (Integer) —

  tile-size

#tile_size=(tile_size) ⇒ Integer

Parameters:

• tile_size (Integer)

Returns:

• (Integer) —

  tile-size

• (Integer) —

  tile-size

#tile_width ⇒ Integer

Returns tile-width.

Returns:

• (Integer) —

  tile-width

#tile_width=(tile_width) ⇒ Integer

Parameters:

• tile_width (Integer)

Returns:

• (Integer) —

  tile-width

• (Integer) —

  tile-width