com.bbn.openmap.dataAccess.mapTile
Class GreyscaleImagePreparer

java.lang.Object
  com.bbn.openmap.dataAccess.mapTile.GreyscaleImagePreparer

All Implemented Interfaces:

TileImagePreparer

public class GreyscaleImagePreparer
extends java.lang.Object
implements TileImagePreparer

Creates Grey-scale map tile images.

Author:

dietrick

Constructor Summary

GreyscaleImagePreparer()

Method Summary

void	prepareForEmptyTile(MapTileFactory factory) Overriding the method that creates empty tiles for places with no coverage.
java.awt.image.BufferedImage	preprocessImage(java.awt.Image origImage, int imageWidth, int imageHeight) Method called to manipulate provided image in some way, returning modified image.

Methods inherited from class java.lang.Object

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

Constructor Detail

GreyscaleImagePreparer

public GreyscaleImagePreparer()

Method Detail

prepareForEmptyTile

public void prepareForEmptyTile(MapTileFactory factory)

Overriding the method that creates empty tiles for places with no coverage. We need to set the no-coverage attributes for the EmptyTileHandler (if it's a SimpleEmptyTileHandler) to null, so it doesn't create empty tiles when it's beyond the coverage zoom level limit. Those tiles are normally returned as clear, but in the conversion to greyscale they turn black.

Specified by:

prepareForEmptyTile in interface TileImagePreparer

Parameters:

factory - callback object to find EmptyTileHandler.

preprocessImage

public java.awt.image.BufferedImage preprocessImage(java.awt.Image origImage,
                                                    int imageWidth,
                                                    int imageHeight)
                                             throws java.lang.InterruptedException

Description copied from interface: TileImagePreparer

Method called to manipulate provided image in some way, returning modified image.

Specified by:

preprocessImage in interface TileImagePreparer

Parameters:

origImage - Any java Image

imageWidth - pixel width

imageHeight - pixel height

Returns:

BufferedImage with any changes necessary.

Throws:

java.lang.InterruptedException