Class PreloaderEMF

java.lang.Object
org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader
org.apache.xmlgraphics.image.loader.impl.PreloaderEMF
All Implemented Interfaces:
ImagePreloader

public class PreloaderEMF extends AbstractImagePreloader
Image preloader for EMF images.
  • Field Details

    • EMF_SIG_LENGTH

      protected static final int EMF_SIG_LENGTH
      Length of the EMF header
      See Also:
    • SIGNATURE_OFFSET

      private static final int SIGNATURE_OFFSET
      offset to signature
      See Also:
    • WIDTH_OFFSET

      private static final int WIDTH_OFFSET
      offset to width
      See Also:
    • HEIGHT_OFFSET

      private static final int HEIGHT_OFFSET
      offset to height
      See Also:
    • HRES_PIXEL_OFFSET

      private static final int HRES_PIXEL_OFFSET
      offset to horizontal resolution in pixel
      See Also:
    • VRES_PIXEL_OFFSET

      private static final int VRES_PIXEL_OFFSET
      offset to vertical resolution in pixel
      See Also:
    • HRES_MM_OFFSET

      private static final int HRES_MM_OFFSET
      offset to horizontal resolution in mm
      See Also:
    • VRES_MM_OFFSET

      private static final int VRES_MM_OFFSET
      offset 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. An ImageException 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 image
      src - a image source the image is loaded from
      context - 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 image
      ImageException - if an error occurs while preloading the image
    • determineSize

      private ImageSize determineSize(ImageInputStream in, ImageContext context) throws IOException, ImageException
      Throws:
      IOException
      ImageException