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java.lang.Objectorg.gnu.glib.Struct
org.gnu.glib.GObject
org.gnu.gdk.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 |
getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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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