public class PreloaderImageIO extends AbstractImagePreloader
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.
DEFAULT_PRIORITY
构造器和说明 |
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PreloaderImageIO() |
限定符和类型 | 方法和说明 |
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int |
getPriority()
Returns the priority of the preloader.
|
ImageInfo |
preloadImage(String uri,
Source src,
ImageContext context)
"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.
|
getHeader
public ImageInfo preloadImage(String uri, Source src, ImageContext context) throws IOException, ImageException
ImageException
is only
thrown if the image is identified but some error has happened while working on the file.uri
- the original (unresolved) URI of the imagesrc
- a image source the image is loaded fromcontext
- the context object that provides configuration informationImageException
IOException
- if an I/O error occurs while preloading the imagepublic int getPriority()
getPriority
在接口中 ImagePreloader
getPriority
在类中 AbstractImagePreloader
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