Package net.coobird.thumbnailator.resizers

Class ProgressiveBilinearResizer

java.lang.Object

net.coobird.thumbnailator.resizers.AbstractResizer

net.coobird.thumbnailator.resizers.ProgressiveBilinearResizer

All Implemented Interfaces:

Resizer

public class ProgressiveBilinearResizer
extends AbstractResizer

A Resizer which performs resizing operations by using progressive bilinear scaling.

The resizing technique used in this class is based on the technique discussed in Chapter 4: Images of Filthy Rich Clients by Chet Haase and Romain Guy.

The actual implementation of the technique is independent of the code which is provided in the book.

Field Summary

Fields

Modifier and Type	Field	Description
private BilinearResizer	bilinearResizer	A resizer that's used when a single-step resize is needed.

Fields inherited from class net.coobird.thumbnailator.resizers.AbstractResizer

KEY_INTERPOLATION, RENDERING_HINTS, UNMODIFIABLE_RENDERING_HINTS

Constructor Summary

Constructors

Constructor	Description
ProgressiveBilinearResizer()	Instantiates a ProgressiveBilinearResizer with default rendering hints.
ProgressiveBilinearResizer(java.util.Map<java.awt.RenderingHints.Key,java.lang.Object> hints)	Instantiates a ProgressiveBilinearResizer with the specified rendering hints.

Method Summary

Modifier and Type	Method	Description
void	resize(java.awt.image.BufferedImage srcImage, java.awt.image.BufferedImage destImage)	Resizes an image using the progressive bilinear scaling technique.

Methods inherited from class net.coobird.thumbnailator.resizers.AbstractResizer

createGraphics, getRenderingHints, performChecks

Methods inherited from class java.lang.Object

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

Field Detail

bilinearResizer

private final BilinearResizer bilinearResizer

A resizer that's used when a single-step resize is needed.

Constructor Detail

ProgressiveBilinearResizer

public ProgressiveBilinearResizer()

Instantiates a ProgressiveBilinearResizer with default rendering hints.

ProgressiveBilinearResizer

public ProgressiveBilinearResizer(java.util.Map<java.awt.RenderingHints.Key,java.lang.Object> hints)

Instantiates a ProgressiveBilinearResizer with the specified rendering hints.

Parameters:

hints - Additional rendering hints to apply.

Method Detail

resize

public void resize(java.awt.image.BufferedImage srcImage,
                   java.awt.image.BufferedImage destImage)
            throws java.lang.NullPointerException

Resizes an image using the progressive bilinear scaling technique.

When the source image isn't at least twice as large as the destination image for both dimensions, a regular one-step scaling is performed.

If the source and/or destination image is null, then a NullPointerException will be thrown.

Specified by:

resize in interface Resizer

Overrides:

resize in class AbstractResizer

Parameters:

srcImage - The source image.

destImage - The destination image.

Throws:

java.lang.NullPointerException - When the source and/or the destination image is null.