`GdkPixbufLoader` provides a way for applications to drive the process of loading an image, by letting them send the image data directly
to the loader instead of having the loader read the data from a file. Applications can use this functionality instead of
`gdk_pixbuf_new_from_file()` or `gdk_pixbuf_animation_new_from_file()` when they need to parse image data in small chunks. For example, it
should be used when reading an image from a (potentially) slow network connection, or when loading an extremely large file.
To use `GdkPixbufLoader` to load an image, create a new instance, and call [methodGdkPixbuf.PixbufLoader.write] to send the
data to it. When done, [methodGdkPixbuf.PixbufLoader.close] should be called to end the stream and finalize everything.
The loader will emit three important signals throughout the process:
- [signalGdkPixbuf.PixbufLoadersize_prepared] will be
emitted as soon as the image has enough information to determine the size of the image to be used. If you want to scale the image while
loading it, you can call [methodGdkPixbuf.PixbufLoader.set_size] in response to this signal. - [signal
GdkPixbuf.PixbufLoaderarea_prepared] will be emitted as soon as
the pixbuf of the desired has been allocated. You can obtain the `GdkPixbuf` instance by calling [methodGdkPixbuf.PixbufLoader
.get_pixbuf]. If you want to use it, simply acquire a reference to it. You can also call `gdk_pixbuf_loader_get_pixbuf()` later to
get the same pixbuf. - [signalGdkPixbuf.PixbufLoaderarea_updated
] will be emitted every time a region is updated. This way you can update a partially completed image. Note that you do not know
anything about the completeness of an image from the updated area. For example, in an interlaced image you will need to make several
passes before the image is done loading.
typeof (unichar2)typeof
(unichar2) Loading an animation
Loading an animation is almost as easy as loading an image. Once the first [signalGdkPixbuf.PixbufLoaderarea_prepared] signal has been emitted, you can call [method
GdkPixbuf.PixbufLoader.get_animation] to get the [classGdkPixbuf.PixbufAnimation] instance, and then call and
[methodGdkPixbuf.PixbufAnimation.get_iter] to get a [classGdkPixbuf.PixbufAnimationIter] to retrieve the pixbuf
for the desired time stamp.
Creates a new pixbuf loader object that always attempts to parse image
data as if it were an image of MIME type mime_type, instead of identifying the type automatically.
Creates a new pixbuf loader object that always attempts to parse image
data as if it were an image of type image_type, instead of identifying the type automatically.
publicvirtualsignalvoidsize_prepared (int width, int height)
This signal is emitted when the pixbuf loader has been fed the initial
amount of data that is required to figure out the size of the image that it will create.
Inherited Members:
All known members inherited from class GLib.Object