ome.services

Class SVGRasterizer

java.lang.Object

ome.services.SVGRasterizer

public class SVGRasterizer
extends Object

This class provides a simple and method based API for converting a SVG document fragment to a BufferedImage.

Author:

Thierry Kormann, Chris Allan/a> (Modifications for OMERO; adding JPEG support; updating to Batik 1.7)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	SVGRasterizer.Rasterizer An image transcoder that stores the resulting image.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.batik.transcoder.TranscodingHints	hints The transcoder hints.
protected BufferedImage	img The image that represents the SVG document.
protected org.apache.batik.transcoder.TranscoderInput	input The transcoder input.

Constructor Summary

Constructors

Constructor and Description
SVGRasterizer(InputStream istream) Constructs a new SVGRasterizer converter.
SVGRasterizer(Reader reader) Constructs a new SVGRasterizer converter.
SVGRasterizer(String uri) Constructs a new SVGRasterizer.
SVGRasterizer(URL url) Constructs a new SVGRasterizer.

Method Summary

Methods

Modifier and Type	Method and Description
BufferedImage	createBufferedImage() Returns the image that represents the SVG document.
void	createJPEG(OutputStream outputStream) Returns the image that represents the SVG document as a JPEG.
void	setAlternateStylesheet(String alternateStylesheet) Sets the alternate stylesheet to use.
void	setBackgroundColor(Paint p) Sets the Paint to use for the background of the image.
void	setImageHeight(float height) Sets the height of the image to rasterize.
void	setImageWidth(float width) Sets the width of the image to rasterize.
void	setLanguages(String language) Sets the preferred language to use.
void	setMedia(String media) Sets the media to rasterize.
void	setPixelToMMFactor(float px2mm) Sets the unit conversion factor to the specified value.
void	setQuality(float quality) Sets the quality of the image to rasterize when rasterizing to a JPEG.
void	setUserStyleSheetURI(String uri) Sets the uri of the user stylesheet.
void	setXMLParserValidating(boolean b) Sets whether or not the XML parser used to parse SVG document should be validating or not, depending on the specified parameter.

Methods inherited from class java.lang.Object

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

Field Detail

input

protected org.apache.batik.transcoder.TranscoderInput input

The transcoder input.

hints

protected org.apache.batik.transcoder.TranscodingHints hints

The transcoder hints.

img

protected BufferedImage img

The image that represents the SVG document.

Constructor Detail

SVGRasterizer

public SVGRasterizer(String uri)

Constructs a new SVGRasterizer.

Parameters:

uri - the uri of the document to rasterize

SVGRasterizer

public SVGRasterizer(URL url)

Constructs a new SVGRasterizer.

Parameters:

url - the URL of the document to rasterize

SVGRasterizer

public SVGRasterizer(InputStream istream)

Constructs a new SVGRasterizer converter.

Parameters:

istream - the input stream that represents the SVG document to rasterize

SVGRasterizer

public SVGRasterizer(Reader reader)

Constructs a new SVGRasterizer converter.

Parameters:

reader - the reader that represents the SVG document to rasterize

Method Detail

createBufferedImage

public BufferedImage createBufferedImage()
                                  throws org.apache.batik.transcoder.TranscoderException

Returns the image that represents the SVG document.

Throws:

org.apache.batik.transcoder.TranscoderException

createJPEG

public void createJPEG(OutputStream outputStream)
                throws org.apache.batik.transcoder.TranscoderException

Returns the image that represents the SVG document as a JPEG.

Throws:

org.apache.batik.transcoder.TranscoderException

setQuality

public void setQuality(float quality)

Sets the quality of the image to rasterize when rasterizing to a JPEG.

Parameters:

quality - the percentage quality

setImageWidth

public void setImageWidth(float width)

Sets the width of the image to rasterize.

Parameters:

width - the image width

setImageHeight

public void setImageHeight(float height)

Sets the height of the image to rasterize.

Parameters:

width - the image height

setLanguages

public void setLanguages(String language)

Sets the preferred language to use. SVG documents can provide text in multiple languages, this method lets you control which language to use if possible. e.g. "en" for english or "fr" for french.

Parameters:

language - the preferred language to use

setPixelToMMFactor

public void setPixelToMMFactor(float px2mm)

Sets the unit conversion factor to the specified value. This method lets you choose how units such as 'em' are converted. e.g. 0.26458 is 96dpi (the default) or 0.3528 is 72dpi.

Parameters:

px2mm - the pixel to millimeter convertion factor.

setUserStyleSheetURI

public void setUserStyleSheetURI(String uri)

Sets the uri of the user stylesheet. The user stylesheet can be used to override styles.

Parameters:

uri - the uri of the user stylesheet

setXMLParserValidating

public void setXMLParserValidating(boolean b)

Sets whether or not the XML parser used to parse SVG document should be validating or not, depending on the specified parameter. For futher details about how media work, see the Media types in the CSS2 specification.

Parameters:

b - true means the XML parser will validate its input

setMedia

public void setMedia(String media)

Sets the media to rasterize. The medium should be separated by comma. e.g. "screen", "print" or "screen, print"

Parameters:

media - the media to use

setAlternateStylesheet

public void setAlternateStylesheet(String alternateStylesheet)

Sets the alternate stylesheet to use. For futher details, you can have a look at the Associating Style Sheets with XML documents.

Parameters:

alternateStylesheet - the alternate stylesheet to use if possible

setBackgroundColor

public void setBackgroundColor(Paint p)

Sets the Paint to use for the background of the image.

Parameters:

p - the paint to use for the background