org.apache.xmlgraphics.image.loader.impl.imageio
Class PreloaderImageIO
java.lang.Object
org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader
org.apache.xmlgraphics.image.loader.impl.imageio.PreloaderImageIO
- All Implemented Interfaces:
- ImagePreloader
public class PreloaderImageIO
- extends AbstractImagePreloader
Image preloader for images supported by ImageIO.
Note: The implementation relies on the presence of a working ImageIO implementation which
provides accurate image metadata. This is particularly important for PNG image because the
PNG loader relies on that.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
PreloaderImageIO
public PreloaderImageIO()
preloadImage
public ImageInfo preloadImage(java.lang.String uri,
javax.xml.transform.Source src,
ImageContext context)
throws java.io.IOException,
ImageException
- "Preloads" an image, i.e. indentifies whether the source image is supported by this
implementation and determines the image's intrinsic size and possibly some additional
information. The image is usually not fully loaded at this time to conserve memory.
- Parameters:
uri
- the original (unresolved) URI of the imagesrc
- a image source the image is loaded fromcontext
- the context object that provides configuration information
- Returns:
- an image info object with the basic information about an image
- Throws:
ImageException
java.io.IOException
- if an I/O error occurs while preloading the image
getPriority
public int getPriority()
- Returns the priority of the preloader. The lower the value, the higher the preloader's
priority.
- Specified by:
getPriority
in interface ImagePreloader
- Overrides:
getPriority
in class AbstractImagePreloader
- Returns:
- an integer (default is 1000)
Copyright 1999-2008 The Apache Software Foundation. All Rights Reserved.