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Public Member Functions | |
void | close () |
Informs a pixbuf loader that no further writes with write() will occur, so that it can free its internal loading structures. | |
Glib::RefPtr<Gdk::PixbufAnimation> | get_animation () |
Queries the Gdk::PixbufAnimation that a pixbuf loader is currently creating. | |
PixbufFormat | get_format () const |
Obtains the available information about the format of the currently loading image file. | |
Glib::RefPtr<Gdk::Pixbuf> | get_pixbuf () |
Queries the Gdk::Pixbuf that a pixbuf loader is currently creating. | |
const GdkPixbufLoader* | gobj () const |
Provides access to the underlying C GObject. | |
GdkPixbufLoader* | gobj () |
Provides access to the underlying C GObject. | |
GdkPixbufLoader* | gobj_copy () |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. | |
void | set_size (int width, int height) |
Causes the image to be scaled while it is loaded. | |
Glib::SignalProxy0<void> | signal_area_prepared () |
This signal is emitted when the pixbuf loader has allocated the pixbuf in the desired size. | |
Glib::SignalProxy4< void, int, int, int, int > | signal_area_updated () |
This signal is emitted when a significant area of the image being loaded has been updated. | |
Glib::SignalProxy0<void> | signal_closed () |
This signal is emitted when close() is called. | |
Glib::SignalProxy2< void, int, int > | signal_size_prepared () |
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. | |
void | write (const guint8* buf, gsize count) |
This will cause a pixbuf loader to parse the next count bytes of an image. | |
virtual | ~PixbufLoader () |
Static Public Member Functions | |
static Glib::RefPtr<PixbufLoader> | create (const Glib::ustring& image_type, bool mime_type=false) |
Constructs a pixbuf loader object for a specific image type. | |
static Glib::RefPtr<PixbufLoader> | create () |
Creates a new pixbuf loader object. | |
Protected Member Functions | |
virtual void | on_area_prepared () |
virtual void | on_area_updated (int x, int y, int width, int height) |
virtual void | on_closed () |
PixbufLoader (const Glib::ustring& image_type, bool mime_type=false) | |
Constructs a pixbuf loader object for a specific image type. | |
PixbufLoader () | |
Constructs a pixbuf loader object. | |
Related Functions | |
(Note that these are not member functions.) | |
Glib::RefPtr<Gdk::PixbufLoader> | wrap (GdkPixbufLoader* object, bool take_copy=false) |
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Constructs a pixbuf loader object.
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Constructs a pixbuf loader object for a specific image type. Constructs 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. Useful if you want an error if the image isn't the expected type, for loading image formats that can't be reliably identified by looking at the data, or if the user manually forces a specific type. The image_type can be one of the types returned by Gdk::Pixbuf::get_formats(), or a MIME type. Common MIME Types are listed here http://www.iana.org/assignments/media-types/ and here: http://www.freedesktop.org/Software/shared-mime-info The list of non-mime-type image formats depends on what image loaders are installed, but typically "png", "jpeg", "gif", "tiff" and "xpm" are among the supported formats. To obtain the full list of supported image formats, call PixbufFormat::get_name() on each of the PixbufFormats returned by Gdk::Pixbuf::get_formats().
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Informs a pixbuf loader that no further writes with write() will occur, so that it can free its internal loading structures.
Also, tries to parse any data that hasn't yet been parsed; if the remaining data is partial or corrupt, an error will be returned. If
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Constructs a pixbuf loader object for a specific image type. Constructs 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. Useful if you want an error if the image isn't the expected type, for loading image formats that can't be reliably identified by looking at the data, or if the user manually forces a specific type. The image_type can be one of the types returned by Gdk::Pixbuf::get_formats(), or a MIME type. Common MIME Types are listed here http://www.iana.org/assignments/media-types/ and here: http://www.freedesktop.org/Software/shared-mime-info The list of non-mime-type image formats depends on what image loaders are installed, but typically "png", "jpeg", "gif", "tiff" and "xpm" are among the supported formats. To obtain the full list of supported image formats, call PixbufFormat::get_name() on each of the PixbufFormats returned by Gdk::Pixbuf::get_formats().
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Creates a new pixbuf loader object.
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Queries the Gdk::PixbufAnimation that a pixbuf loader is currently creating.
In general it only makes sense to call this function after the "area_prepared" signal has been emitted by the loader. If the loader doesn't have enough bytes yet (hasn't emitted the "area_prepared" signal) this function will return
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Obtains the available information about the format of the currently loading image file.
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Queries the Gdk::Pixbuf that a pixbuf loader is currently creating.
In general it only makes sense to call this function after the "area_prepared" signal has been emitted by the loader; this means that enough data has been read to know the size of the image that will be allocated. If the loader has not received enough data via write(), then this function returns
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Provides access to the underlying C GObject.
Reimplemented from Glib::ObjectBase. |
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Provides access to the underlying C GObject.
Reimplemented from Glib::ObjectBase. |
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Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
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Causes the image to be scaled while it is loaded. The desired image size can be determined relative to the original size of the image by calling set_size() from a signal handler for the size_prepared signal. Attempts to set the desired image size are ignored after the emission of the size_prepared signal.
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This signal is emitted when the pixbuf loader has allocated the pixbuf in the desired size. After this signal is emitted, applications can call get_pixbuf() to fetch the partially-loaded pixbuf. |
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This signal is emitted when a significant area of the image being loaded has been updated. Normally it means that a complete scanline has been read in, but it could be a different area as well. Applications can use this signal to know when to repaint areas of an image that is being loaded.
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This signal is emitted when close() is called. It can be used by different parts of an application to receive notification when an image loader is closed by the code that drives it. |
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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. Applications can call set_size() in response to this signal to set the desired size to which the image should be scaled.
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This will cause a pixbuf loader to parse the next count bytes of an image.
It will return
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