com.ibm.tivoli.maximo.report.control

Class ImageUtils

java.lang.Object

com.ibm.tivoli.maximo.report.control.ImageUtils

public class ImageUtils
extends java.lang.Object

ImageUtils contains some utility methods for converting base64 and svg data into images, and for compositing the 2 images to create a new image. This was created to facilitate downloading dojo charts from the web UI, which are SVG + HTML.

Author:

sls

Constructor Summary

Constructors

Constructor and Description
ImageUtils()

Method Summary

Modifier and Type	Method and Description
java.awt.image.BufferedImage	compositeImages(java.awt.image.BufferedImage src, int dx, int dy, java.awt.image.BufferedImage overlay) Overlay 2 images, with the given offset dx,dy for the overlay image.
void	createCompositeImage(java.lang.String imageDataUri, int dx, int dy, java.lang.String svgImageData, java.io.OutputStream output) Convenience method that overlays a SVG image on top of a base64 encoded image and writes the output to the output stream.
java.awt.image.BufferedImage	toImageFromDataURI(java.lang.String imageData) Given the Base64 encoded image URI (data:image/png;base64,iVBORw0KG...) create a BufferedImage
java.awt.image.BufferedImage	toImageFromSVG(java.lang.String svg) Given the SVG xml, create a BufferedImage.

Methods inherited from class java.lang.Object

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

Constructor Detail

ImageUtils

public ImageUtils()

Method Detail

toImageFromDataURI

public java.awt.image.BufferedImage toImageFromDataURI(java.lang.String imageData)
                                                throws java.io.IOException

Given the Base64 encoded image URI (data:image/png;base64,iVBORw0KG...) create a BufferedImage

Parameters:

imageData -

Returns:

Throws:

java.io.IOException

toImageFromSVG

public java.awt.image.BufferedImage toImageFromSVG(java.lang.String svg)
                                            throws java.lang.Exception

Given the SVG xml, create a BufferedImage.

Parameters:

svg -

Returns:

Throws:

TranscoderException

java.io.IOException

java.lang.Exception

compositeImages

public java.awt.image.BufferedImage compositeImages(java.awt.image.BufferedImage src,
                                                    int dx,
                                                    int dy,
                                                    java.awt.image.BufferedImage overlay)

Overlay 2 images, with the given offset dx,dy for the overlay image. For the dojo charts... the underlying html is converted to a base image, and then we need to overlay the svg chart image on top of that, to create a new image that includes the original html view + chart. (ie, sometimes labels and headers are in html, but we need/want, that data to be in the final "png" image.

Parameters:

src -

dx -

dy -

overlay -

Returns:

createCompositeImage

public void createCompositeImage(java.lang.String imageDataUri,
                                 int dx,
                                 int dy,
                                 java.lang.String svgImageData,
                                 java.io.OutputStream output)
                          throws java.lang.Exception

Convenience method that overlays a SVG image on top of a base64 encoded image and writes the output to the output stream.

Parameters:

imageDataUri -

dx -

dy -

svgImageData -

output -

Throws:

java.io.IOException

TranscoderException

java.lang.Exception