public class PreloaderJPEG extends AbstractImagePreloader implements JPEGConstants
APP0, APP1, APP2, APPD, APPE, APPF, EOI, MARK, NULL, SOF0, SOF1, SOF2, SOFA, SOI, SOS
DEFAULT_PRIORITY
构造器和说明 |
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PreloaderJPEG() |
限定符和类型 | 方法和说明 |
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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, getPriority
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.preloadImage
在接口中 ImagePreloader
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 imageCopyright 1999-2016 The Apache Software Foundation. All Rights Reserved.