Class PreloaderEMF
java.lang.Object
org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader
org.apache.xmlgraphics.image.loader.impl.PreloaderEMF
- All Implemented Interfaces:
ImagePreloader
Image preloader for EMF images.
-
Field Summary
FieldsModifier and TypeFieldDescriptionprotected static final int
Length of the EMF headerprivate static final int
offset to heightprivate static final int
offset to horizontal resolution in mmprivate static final int
offset to horizontal resolution in pixelprivate static final int
offset to signatureprivate static final int
offset to vertical resolution in mmprivate static final int
offset to vertical resolution in pixelprivate static final int
offset to widthFields inherited from interface org.apache.xmlgraphics.image.loader.spi.ImagePreloader
DEFAULT_PRIORITY
-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprivate ImageSize
determineSize
(ImageInputStream in, ImageContext context) preloadImage
(String uri, Source src, ImageContext context) "Preloads" an image, i.e.Methods inherited from class org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader
getHeader, getPriority
-
Field Details
-
EMF_SIG_LENGTH
protected static final int EMF_SIG_LENGTHLength of the EMF header- See Also:
-
SIGNATURE_OFFSET
private static final int SIGNATURE_OFFSEToffset to signature- See Also:
-
WIDTH_OFFSET
private static final int WIDTH_OFFSEToffset to width- See Also:
-
HEIGHT_OFFSET
private static final int HEIGHT_OFFSEToffset to height- See Also:
-
HRES_PIXEL_OFFSET
private static final int HRES_PIXEL_OFFSEToffset to horizontal resolution in pixel- See Also:
-
VRES_PIXEL_OFFSET
private static final int VRES_PIXEL_OFFSEToffset to vertical resolution in pixel- See Also:
-
HRES_MM_OFFSET
private static final int HRES_MM_OFFSEToffset to horizontal resolution in mm- See Also:
-
VRES_MM_OFFSET
private static final int VRES_MM_OFFSEToffset to vertical resolution in mm- See Also:
-
-
Constructor Details
-
PreloaderEMF
public PreloaderEMF()
-
-
Method Details
-
preloadImage
public ImageInfo preloadImage(String uri, Source src, ImageContext context) throws 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. 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:
IOException
- if an I/O error occurs while preloading the imageImageException
- if an error occurs while preloading the image
-
determineSize
private ImageSize determineSize(ImageInputStream in, ImageContext context) throws IOException, ImageException - Throws:
IOException
ImageException
-