org.xenbase.utilities
Class AdvImageUtil

java.lang.Object
  org.xenbase.utilities.AdvImageUtil

public class AdvImageUtil
extends java.lang.Object

Constructor Summary

AdvImageUtil()

Method Summary

static java.awt.image.RenderedImage	convertImageByteArrayToRenderedImage(byte[] b) Takes a raw byte array and converts it into a JAI RenderedImage that can be used for manipulation (i.e.
static byte[]	convertTo(java.lang.String toFormat, byte[] imgBytes) Converts images to a limited variety of formats.
static java.lang.String	getFileType(byte[] imgBytes) Determine the image encoding format of the image contained within the passed byte array
static int	getHeight(byte[] imgBytes) Determines the height of an image.
static int	getWidth(byte[] imgBytes) Determines the width of an image.
static byte[]	makeImageByteArrayFromRenderedImage(java.awt.image.RenderedImage image) Converts a JAI rendered image to a byte array image
static byte[]	scaleTo(int x, int y, byte[] imgBytes) Scales an image to the exact height and width provided, please note, this process will not preserve the aspect ratio of the image.
static byte[]	scaleToFit(int width, int height, byte[] imgBytes) Scales an image to fit the dimensions provided.

Methods inherited from class java.lang.Object

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

Constructor Detail

AdvImageUtil

public AdvImageUtil()

Method Detail

convertTo

public static byte[] convertTo(java.lang.String toFormat,
                               byte[] imgBytes)
                        throws java.lang.Exception,
                               java.lang.Error

Converts images to a limited variety of formats.

Parameters:

toFormat - a string denoting the format you want to convert to 'jpg', 'jpeg', 'png', 'tif', tiff'

imgBytes - the byte array containing the image you want to convert

Returns:

byte array of the newly converted image

Throws:

java.lang.Exception

java.lang.Error

getFileType

public static java.lang.String getFileType(byte[] imgBytes)
                                    throws java.lang.Exception,
                                           java.lang.Error

Determine the image encoding format of the image contained within the passed byte array

Parameters:

imgBytes - byte array of the image you want to identify.

Returns:

string containing the file type of the image in question

Throws:

java.lang.Exception

java.lang.Error

getHeight

public static int getHeight(byte[] imgBytes)
                     throws java.lang.Exception,
                            java.lang.Error

Determines the height of an image.

Parameters:

imgBytes - image byte array

Returns:

int with the height of the image

Throws:

java.lang.Exception

java.lang.Error

getWidth

public static int getWidth(byte[] imgBytes)
                    throws java.lang.Exception,
                           java.lang.Error

Determines the width of an image.

Parameters:

imgBytes - image byte array

Returns:

int with the width of the image

Throws:

java.lang.Exception

java.lang.Error

scaleTo

public static byte[] scaleTo(int x,
                             int y,
                             byte[] imgBytes)
                      throws java.lang.Exception,
                             java.lang.Error

Scales an image to the exact height and width provided, please note, this process will not preserve the aspect ratio of the image. If you wish to preserve the aspect ratio use scaleToFit.

Parameters:

x - int the width you want the resulting image to be.

y - int the height you want the resulting image to be

imgBytes - the byte array of the image you want to scale

Returns:

the byte array of the scaled image

Throws:

java.lang.Exception

java.lang.Error

scaleToFit

public static byte[] scaleToFit(int width,
                                int height,
                                byte[] imgBytes)
                         throws java.lang.Exception,
                                java.lang.Error

Scales an image to fit the dimensions provided. Aspect ratio is maintained therefore it is possible that one of the dimensions of the image will be less than the maximum size you specified.

Parameters:

width - the maximum width to scale the image to

height - the maximum height to scale the image to

imgBytes - the byte array containing the image

Returns:

byte array with the scaled image

Throws:

java.lang.Exception

java.lang.Error

makeImageByteArrayFromRenderedImage

public static byte[] makeImageByteArrayFromRenderedImage(java.awt.image.RenderedImage image)
                                                  throws java.lang.Exception,
                                                         java.lang.Error

Converts a JAI rendered image to a byte array image

Parameters:

image - JAI Rendered Image

Returns:

byte array of the image in JPEG format

Throws:

java.lang.Exception

java.lang.Error

convertImageByteArrayToRenderedImage

public static java.awt.image.RenderedImage convertImageByteArrayToRenderedImage(byte[] b)
                                                                         throws java.lang.Exception,
                                                                                java.lang.Error

Takes a raw byte array and converts it into a JAI RenderedImage that can be used for manipulation (i.e. resizing).

Parameters:

byte[] - b

Returns:

RenderedImage

Throws:

java.lang.Exception

java.lang.Error