Class PreloaderEPS
- java.lang.Object
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- org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader
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- org.apache.xmlgraphics.image.loader.impl.PreloaderEPS
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- All Implemented Interfaces:
ImagePreloader
public class PreloaderEPS extends AbstractImagePreloader
Image preloader for EPS images (Encapsulated PostScript).
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
PreloaderEPS.EPSBinaryFileHeader
Holder class for various pointers to the contents of the EPS file.
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Field Summary
Fields Modifier and Type Field Description static java.lang.Object
EPS_BINARY_HEADER
Key for binary header object used in custom objects of the ImageInfo class.static java.lang.Object
EPS_BOUNDING_BOX
Key for bounding box used in custom objects of the ImageInfo class.-
Fields inherited from interface org.apache.xmlgraphics.image.loader.spi.ImagePreloader
DEFAULT_PRIORITY
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Constructor Summary
Constructors Constructor Description PreloaderEPS()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description private boolean
determineSize(javax.imageio.stream.ImageInputStream in, ImageContext context, ImageInfo info)
ImageInfo
preloadImage(java.lang.String uri, javax.xml.transform.Source src, ImageContext context)
"Preloads" an image, i.e.private PreloaderEPS.EPSBinaryFileHeader
readBinaryFileHeader(javax.imageio.stream.ImageInputStream in)
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Methods inherited from class org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader
getHeader, getPriority
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Field Detail
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EPS_BINARY_HEADER
public static final java.lang.Object EPS_BINARY_HEADER
Key for binary header object used in custom objects of the ImageInfo class.
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EPS_BOUNDING_BOX
public static final java.lang.Object EPS_BOUNDING_BOX
Key for bounding box used in custom objects of the ImageInfo class.
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Method Detail
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preloadImage
public ImageInfo preloadImage(java.lang.String uri, javax.xml.transform.Source src, ImageContext context) throws java.io.IOException
"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. The method returns null if the image was not identified. AnImageException
is only thrown if the image is identified but some error has happened while working on the file.- 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 or null if the image is not supported by this implementation
- Throws:
java.io.IOException
- if an I/O error occurs while preloading the image
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readBinaryFileHeader
private PreloaderEPS.EPSBinaryFileHeader readBinaryFileHeader(javax.imageio.stream.ImageInputStream in) throws java.io.IOException
- Throws:
java.io.IOException
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determineSize
private boolean determineSize(javax.imageio.stream.ImageInputStream in, ImageContext context, ImageInfo info) throws java.io.IOException
- Throws:
java.io.IOException
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