PreloaderRawPNG
Date: 2016-04-28

org.apache.xmlgraphics.image.loader.impl

## Class PreloaderRawPNG

- java.lang.Object
- - org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader
  - - org.apache.xmlgraphics.image.loader.impl.PreloaderRawPNG

- All Implemented Interfaces:
    ImagePreloader

      public class PreloaderRawPNG
      extends AbstractImagePreloader

- - ### Field Summary

    - ### Fields inherited from interface org.apache.xmlgraphics.image.loader.spi.ImagePreloader

      `DEFAULT_PRIORITY`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `PreloaderRawPNG()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `getPriority()` Returns the priority of the preloader.
    `ImageInfo` | `preloadImage(java.lang.String uri, javax.xml.transform.Source src, ImageContext context)` "Preloads" an image, i.e.

    - ### Methods inherited from class org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader

      `getHeader`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### PreloaderRawPNG

          public PreloaderRawPNG()

  - ### Method Detail

    - #### preloadImage

          public ImageInfo preloadImage(java.lang.String uri,
                               javax.xml.transform.Source src,
                               ImageContext context)
                                 throws ImageException,
                                        java.io.IOException

      Description copied from interface: `ImagePreloader`
      "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:
        `ImageException` - if an error occurs while preloading the image
        `java.io.IOException` - if an I/O error occurs while preloading the image

    - #### getPriority

          public int getPriority()

      Description copied from class: `AbstractImagePreloader`
      Returns the priority of the preloader. The lower the value, the higher the preloader's priority.
      Specified by:
        `getPriority` in interface `ImagePreloader`
      Overrides:
        `getPriority` in class `AbstractImagePreloader`
      Returns:
        an integer (default is 1000)