org.rrd4j.graph

## Interface RrdGraphDef.ImageSource

- Enclosing class:
    RrdGraphDef

      public static interface RrdGraphDef.ImageSource

  Implementations of this class can be used to generate image than can be layered on graph. The can be used for background image, a background image draw on canvas or an overlay image.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `BufferedImage` | `apply(int w, int h)` A image of the required size that will be applied.

- - ### Method Detail

    - #### apply

          BufferedImage apply(int w,
                              int h)
                       throws IOException

      A image of the required size that will be applied. If the generated image is too big, it will be clipped before being applied.
      Parameters:
        `w` - the width of the requested image
        `h` - the high of the requested image
      Returns:
        an image to draw.
      Throws:
        `IOException`