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java.lang.Objectorg.gnu.glib.Struct
org.gnu.glib.GObject
org.gnu.gdk.PixbufLoader
public class PixbufLoader
The PixbufLoader 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
Pixbuf.Pixbuf(String)
or PixbufAnimation.PixbufAnimation(String)
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, when loading an extremely large file
or even reading an image from a database.
To use PixbufLoader to load an image, just create a new one, and
call write(byte[])
, write(byte[],int)
, or
write(InputStream)
to send the data to it. When done, close()
should be called to end the stream and finalize everything. The created
Pixbuf
can be retireved using the getPixbuf()
method.
Pixbuf
,
PixbufAnimation
Constructor Summary | |
---|---|
PixbufLoader()
Construct a new PixbufLoader that automatically detects the type of image based on the data. |
|
PixbufLoader(java.lang.String imageType)
Construct a new PixbufLoader that parses the image data as if it were an image of imageType. |
Method Summary | |
---|---|
boolean |
close()
Informs a loader that no further writes will occur, so that it can free its internal loading structures. |
Pixbuf |
getPixbuf()
Get the Pixbuf object that is currently being created. |
PixbufAnimation |
getPixbufAnimation()
Get the PixbufAnimation object that is currently being
created. |
boolean |
write(byte[] buffer)
Parse the images bytes from the given buffer. |
boolean |
write(byte[] buffer,
int len)
Parse len image bytes from buffer. |
boolean |
write(java.io.InputStream stream)
Parse the data for the image from the given stream. |
Methods inherited from class org.gnu.glib.Struct |
---|
equals, getHandle, getNullHandle, hashCode |
Methods inherited from class java.lang.Object |
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getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public PixbufLoader()
public PixbufLoader(java.lang.String imageType)
imageType
- Name of the image format to be loaded with the image.Method Detail |
---|
public boolean write(byte[] buffer)
public boolean write(byte[] buffer, int len)
public boolean write(java.io.InputStream stream)
write(byte[],int)
method. If all of the
data for the image is in the given stream, the close()
method should be called after this method finishes. You can call
getPixbuf()
to get the resulting Pixbuf object.
This method does not make any attempt to efficiently read the data from the given stream. Calling applications should wrap their InputStreams in efficient implementations (such as Buffered* implementations) if necessary before calling this method.
stream
- A stream containing the data to load.
public Pixbuf getPixbuf()
Pixbuf
object that is currently being created.
public PixbufAnimation getPixbufAnimation()
PixbufAnimation
object that is currently being
created.
public boolean close()
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