Package com.bc.ceres.glevel.support

Class DefaultMultiLevelSource

java.lang.Object

com.bc.ceres.glevel.support.AbstractMultiLevelSource

com.bc.ceres.glevel.support.DefaultMultiLevelSource

All Implemented Interfaces:

MultiLevelSource

public class DefaultMultiLevelSource
extends AbstractMultiLevelSource

A default implementation for the MultiLevelSource interface.

Field Summary

Fields

Modifier and Type	Field	Description
static javax.media.jai.Interpolation	DEFAULT_INTERPOLATION	Default interpolation is "Nearest Neighbour".
static MultiLevelSource	NULL

Constructor Summary

Constructors

Constructor	Description
DefaultMultiLevelSource(RenderedImage sourceImage, int levelCount)	Constructs a new instance with DEFAULT_INTERPOLATION.
DefaultMultiLevelSource(RenderedImage sourceImage, int levelCount, javax.media.jai.Interpolation interpolation)	Constructs a new instance.
DefaultMultiLevelSource(RenderedImage sourceImage, MultiLevelModel multiLevelModel)	Constructs a new instance with DEFAULT_INTERPOLATION.
DefaultMultiLevelSource(RenderedImage sourceImage, MultiLevelModel multiLevelModel, javax.media.jai.Interpolation interpolation)	Constructs a new instance with DEFAULT_INTERPOLATION.

Method Summary

Modifier and Type	Method	Description
static MultiLevelModel	createDefaultMultiLevelModel(RenderedImage sourceImage, int levelCount)
protected RenderedImage	createImage(int level)	Creates a scaled version of the level-0 image for the given level.
RenderedImage	getImage(int level)	Returns the level-0 image if level equals zero, otherwise calls super.getLevelImage(level).
javax.media.jai.Interpolation	getInterpolation()
static Rectangle	getLevelImageBounds(Rectangle sourceBounds, double scale)	Computes the boundaries of an image at a given resolution scaling from the given source image boundaries (at level zero).
RenderedImage	getSourceImage()
void	reset()	Removes all cached level images and also disposes any PlanarImages among them.

Methods inherited from class com.bc.ceres.glevel.support.AbstractMultiLevelSource

checkLevel, getImageShape, getModel

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_INTERPOLATION

public static final javax.media.jai.Interpolation DEFAULT_INTERPOLATION

Default interpolation is "Nearest Neighbour".

NULL

public static final MultiLevelSource NULL

Constructor Detail

DefaultMultiLevelSource

public DefaultMultiLevelSource(RenderedImage sourceImage,
                               int levelCount)

Constructs a new instance with DEFAULT_INTERPOLATION.

Parameters:

sourceImage - The source image.

levelCount - The level count.

DefaultMultiLevelSource

public DefaultMultiLevelSource(RenderedImage sourceImage,
                               int levelCount,
                               javax.media.jai.Interpolation interpolation)

Constructs a new instance.

Parameters:

sourceImage - The source image.

levelCount - The level count.

interpolation - The interpolation.

DefaultMultiLevelSource

public DefaultMultiLevelSource(RenderedImage sourceImage,
                               MultiLevelModel multiLevelModel)

Constructs a new instance with DEFAULT_INTERPOLATION.

Parameters:

sourceImage - The source image.

multiLevelModel - The multi level model.

DefaultMultiLevelSource

public DefaultMultiLevelSource(RenderedImage sourceImage,
                               MultiLevelModel multiLevelModel,
                               javax.media.jai.Interpolation interpolation)

Constructs a new instance with DEFAULT_INTERPOLATION.

Parameters:

sourceImage - The source image.

multiLevelModel - The multi level model.

interpolation - The interpolation.

Method Detail

getSourceImage

public RenderedImage getSourceImage()

getInterpolation

public javax.media.jai.Interpolation getInterpolation()

getImage

public RenderedImage getImage(int level)

Returns the level-0 image if level equals zero, otherwise calls super.getLevelImage(level). This override prevents the base class from storing a reference to the source image (the level-0 image). See AbstractMultiLevelSource.createImage(int).

Specified by:

getImage in interface MultiLevelSource

Overrides:

getImage in class AbstractMultiLevelSource

Parameters:

level - The level.

Returns:

The image.

createImage

protected RenderedImage createImage(int level)

Creates a scaled version of the level-0 image for the given level. See getImage(int) and super.createImage(int).

Specified by:

createImage in class AbstractMultiLevelSource

Parameters:

level - The level.

Returns:

The image.

reset

public void reset()

Description copied from class: AbstractMultiLevelSource

Removes all cached level images and also disposes any PlanarImages among them.

Overrides should always call super.reset().

Specified by:

reset in interface MultiLevelSource

Overrides:

reset in class AbstractMultiLevelSource

createDefaultMultiLevelModel

public static MultiLevelModel createDefaultMultiLevelModel(RenderedImage sourceImage,
                                                           int levelCount)

getLevelImageBounds

public static Rectangle getLevelImageBounds(Rectangle sourceBounds,
                                            double scale)

Computes the boundaries of an image at a given resolution scaling from the given source image boundaries (at level zero).

Parameters:

sourceBounds - The image boundaries of the level zero image.

scale - The scale at a given level as returned by MultiLevelModel.getScale(int).

Returns:

The level image boundaries in pixel coordinates.

Since:

BEAM 5