Class
GeglMetadataHash
Instance methods
Methods inherited from GeglMetadataStore (36)
Please see GeglMetadataStore for a full list of methods.
Methods inherited from GeglMetadata (9)
gegl_metadata_get_resolution
Retrieve resolution from the application image metadata. Intended for use
by the image file writer. If resolution is not supported by the application
or if the operation fails FALSE is returned and the resolution values are
not updated.
gegl_metadata_iter_get_value
Retrieve image file metadata from the application. Intended for use by the
image file writer. If the operation fails it returns FALSE and value is
not updated.
gegl_metadata_iter_init
Initialise an iterator to find all supported metadata keys.
gegl_metadata_iter_lookup
Look up the specified key and initialise an iterator to reference the
associated metadata. The iterator is used in conjunction with
gegl_metadata_set_value() and gegl_metadata_get_value(). Note that this
iterator is not valid for gegl_metadata_iter_next().
gegl_metadata_iter_next
Move the iterator to the next metadata item.
gegl_metadata_iter_set_value
Set application data retrieved from image file’s metadata. Intended for use
by the image file reader. If the operation fails it returns FALSE and
value is ignored.
gegl_metadata_register_map
Set the name of the file module and pass an array of mappings from file-format specific metadata names to those used by Gegl. A GValue transformation function may be supplied, e.g. to parse or format timestamps.
gegl_metadata_set_resolution
Set resolution retrieved from image file’s metadata. Intended for use by
the image file reader. If resolution is not supported by the application or
if the operation fails FALSE is returned and the values are ignored.
gegl_metadata_unregister_map
Unregister the file module mappings and any further mappings added or modified by the application. This should be called after the file module completes operations.
Properties
Properties inherited from GeglMetadataStore (14)
Gegl.MetadataStore:artist
Name of image creator.
Gegl.MetadataStore:comment
Miscellaneous comment; conversion from GIF comment.
Gegl.MetadataStore:copyright
Copyright notice.
Gegl.MetadataStore:description
Description of image (possibly long).
Gegl.MetadataStore:disclaimer
Legal disclaimer.
Gegl.MetadataStore:file-module-name
Current file loader/saver module name. Valid only while a GeglMetadata
mapping is registered. This property is mainly provided for use in signal handlers.
Gegl.MetadataStore:resolution-unit
A GeglResolutionUnit specifying units for the image resolution (density).
Gegl.MetadataStore:resolution-x
X resolution or density in dots per unit.
Gegl.MetadataStore:resolution-y
Y resolution or density in dots per unit.
Gegl.MetadataStore:software
Software used to create the image.
Gegl.MetadataStore:source
Device used to create the image.
Gegl.MetadataStore:timestamp
Time of original image creation.
Gegl.MetadataStore:title
Short (one line) title or caption for image.
Gegl.MetadataStore:warning
Warning of nature of content.
Signals
Signals inherited from GeglMetadataStore (5)
GeglMetadataStore::changed
::changed is emitted when a metadata value is changed. This is analogous
to the GObject::notify signal.
GeglMetadataStore::generate-value
If a signal handler is connected to ::generate-value a signal is emitted
when the file module accesses a value using gegl_metadata_get_value().
The signal handler must generate a value of the type specified in the pspec
argument. The signal handler’s return value indicates the success of the operation.
GeglMetadataStore::mapped
::mapped is emitted after a file module registers a mapping and before
other processing takes place. An application may respond to the signal by
registering additional mappings or overriding existing values, for example
it might override the TIFF ImageDescription tag to format multiple metadata
values into the description.
GeglMetadataStore::parse-value
If a signal handler is connected to ::parse-value a signal is emitted when
the file module accesses a value using gegl_metadata_set_value(). The
signal handler should parse the value supplied in the GValue and may set
any number of metadata values using gegl_metadata_store_set_value().
GeglMetadataStore::unmapped
::unmapped is emitted when a file module tries to look up an unmapped
metadata name. When the handler returns a second attempt is made to look
up the metadata.
Signals inherited from GObject (1)
GObject::notify
The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.