public WritableRaster copyData(WritableRaster raster)
Computes an arbitrary rectangular region of the RenderedImage
and copies it into a caller-supplied WritableRaster.  The region
to be computed is determined from the bounds of the supplied
WritableRaster.  The supplied WritableRaster must have a
SampleModel that is compatible with this image.  If raster is null,
an appropriate WritableRaster is created.

 public ColorModel getColorModel()
Returns the ColorModel associated with this image.  All Rasters
returned from this image will have this as their ColorModel.  This
can return null.

 public Raster getData()
Returns the image as one large tile (for tile based
images this will require fetching the whole image
and copying the image data over).  The Raster returned is
a copy of the image data and will not be updated if the image
is changed.

 public Raster getData(Rectangle rect)
Computes and returns an arbitrary region of the RenderedImage.
The Raster returned is a copy of the image data and will not
be updated if the image is changed.

 public int getHeight()
Returns the height of the RenderedImage.

 public int getMinTileX()
Returns the minimum tile index in the X direction.

 public int getMinTileY()
Returns the minimum tile index in the Y direction.

 public int getMinX()
Returns the minimum X coordinate (inclusive) of the RenderedImage.

 public int getMinY()
Returns the minimum Y coordinate (inclusive) of the RenderedImage.

 public int getNumXTiles()
Returns the number of tiles in the X direction.

 public int getNumYTiles()
Returns the number of tiles in the Y direction.

 public Object getProperty(String name)
Gets a property from the property set of this image.  The set of
properties and whether it is immutable is determined by the
implementing class.  This method returns
java.awt.Image.UndefinedProperty if the specified property is
not defined for this RenderedImage.

 public String[] getPropertyNames()
Returns an array of names recognized by
 getProperty(String) 
or null, if no property names are recognized.

 public SampleModel getSampleModel()
Returns the SampleModel associated with this image.  All Rasters
returned from this image will have this as their SampleModel.

 public Vector<RenderedImage> getSources()
Returns a vector of RenderedImages that are the immediate sources of
image data for this RenderedImage.  This method returns null if
the RenderedImage object has no information about its immediate
sources.  It returns an empty Vector if the RenderedImage object has
no immediate sources.

 public Raster getTile(int tileX,
    int tileY)
Returns tile (tileX, tileY).  Note that tileX and tileY are indices
into the tile array, not pixel locations.  The Raster that is returned
is live and will be updated if the image is changed.

 public int getTileGridXOffset()
Returns the X offset of the tile grid relative to the origin,
i.e., the X coordinate of the upper-left pixel of tile (0, 0).
(Note that tile (0, 0) may not actually exist.)

 public int getTileGridYOffset()
Returns the Y offset of the tile grid relative to the origin,
i.e., the Y coordinate of the upper-left pixel of tile (0, 0).
(Note that tile (0, 0) may not actually exist.)

 public int getTileHeight()
Returns the tile height in pixels.  All tiles must have the same
 height.

 public int getTileWidth()
Returns the tile width in pixels.  All tiles must have the same
 width.

 public int getWidth()
Returns the width of the RenderedImage.