public class PixbufLoader : Object
Incremental image loader.
`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 [method
GdkPixbuf.PixbufLoader.write] to send the data
to it. When done, [method
GdkPixbuf.PixbufLoader.close] should be called to end the stream and finalize everything.
The loader will emit three important signals throughout the process:
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 [method
GdkPixbuf.PixbufLoader.set_size] in response to this signal. - [signal
area_prepared] will be emitted as soon as the pixbuf of
the desired has been allocated. You can obtain the `GdkPixbuf` instance by calling [method
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. - [signal
GdkPixbuf.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.
Loading an animation is almost as easy as loading an image. Once the first [signal
area_prepared] signal has been emitted, you can call [method
GdkPixbuf.PixbufLoader.get_animation] to get the [class
GdkPixbuf.PixbufAnimation] instance, and then call and [method
GdkPixbuf.PixbufAnimation.get_iter] to get a [class
GdkPixbuf.PixbufAnimationIter] to retrieve the pixbuf for the
desired time stamp.