Batik SVG Toolkit - Apache Software Foundation

Batik SVG Toolkit

SVG Tools in Java

by Vincent Hardy, Thierry Kormann, Stephane Hillion

Table of contents

1 Batik Overview.................................................................................................................. 2 2 Script Security Warning.....................................................................................................2 3 Applications of Batik......................................................................................................... 2 4 The SVG Specification...................................................................................................... 3 5 Batik's Implementation Status............................................................................................3 6 Download Batik................................................................................................................. 4 7 Examples of projects and products using Batik................................................................. 4

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Batik SVG Toolkit

1. Batik Overview

Batik is a Java(tm) technology based toolkit for applications or applets that want to use images in the Scalable Vector Graphics (SVG) format for various purposes, such as viewing, generation or manipulation. ? Script Security Warning ? Applications of Batik ? The SVG Specification ? What is Batik's Implementation Status? ? Downloading the Batik distribution (source and binary) ? Examples of projects and products using Batik

The project's ambition is to give developers a set of core modules which can be used together or individually to support specific SVG solutions. Examples of modules are the SVG Parser, the SVG Generator and the SVG DOM. Another ambition for the Batik project is to make it highly extensible (for example, Batik allows the developer to handle custom SVG tags). Even though the goal of the project is to provide a set of core modules, one of the deliverables is a full fledged SVG browser implementation which validates the various modules and their inter-operability.

2. Script Security Warning

This is a warning that a script security issue was reported in the Batik Squiggle browser. Squiggle uses the Rhino scripting engine and some features of that engine can be leveraged by malicious scripts to gain access to otherwise protected resources (like the file system).

The Batik team has worked with the Rhino team to fix the isssue that was reported and the Batik 1.5.1 patch release addresses the issue.

3. Applications of Batik

With Batik, you can manipulate SVG documents anywhere Java is available. You can also use the various Batik modules to generate, manipulate, transcode and search SVG images in your applications or applets.

Batik makes it easy for Java based applications or applets to deal with SVG content. For example, using Batik's SVG generator module, a Java application or applets can very easily export its graphics into the SVG format. Using Batik's SVG processor and SVG Viewing

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Batik SVG Toolkit

component, an application or applet can very easily integrate SVG viewing capabilities. Another possibility is to use Batik's modules to convert SVG to various formats, such as raster images (JPEG,PNG or Tiff).

Batik provides core modules for handling and processing SVG files. See examples of projects and products using Batik for real-life example of how Batik is already integrated in projects and products.

Batik provides building blocks that developers can assemble in various ways in their Java technology applications or applets to generate, parse, view or convert SVG contents. Batik can also be used to generate SVG on a client or on a server, and Batik can convert SVG content convert SVG content into other formats such as JPEG, PNG or Tiff or other formats (transcoder API). Batik's goal is to make it easy for developers to handle SVG content for various purposes, client-side or server-side, as illustrated in the diagram.

4. The SVG Specification

Scalable Vector Graphics, SVG, is a W3C recommendation. It defines an XML grammar for rich 2D graphics which includes features such as transparency, arbitrary geometry, filter effects (shadows, lighting effects, etc...), scripting and animation.

The SVG specification states:

This specification defines the features and syntax for Scalable Vector Graphics (SVG). SVG is a language for describing two-dimensional graphics in XML [XML10]. SVG allows for three types of graphic objects: vector graphic shapes (e.g., paths consisting of straight lines and curves), images and text. Graphical objects can be grouped, styled, transformed and composited into previously rendered objects. The feature set includes nested transformations, clipping paths, alpha masks, filter effects and template objects.

SVG drawings can be interactive and dynamic. Animations can be defined and triggered either declaratively (i.e., by embedding SVG animation elements in SVG content) or via scripting.

5. Batik's Implementation Status

The latest revision of Batik is a conformant static SVG implementation and supports interactivity, linking and scripting features of the SVG specification. The Batik project does not support declarative animation and there is currently no plan to add support for SMIL Animation to the Batik project.

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Batik SVG Toolkit

See the status page for a detailed description of the set of SVG features Batik supports.

6. Download Batik

You can get the Batik distribution (source and binary) on the download page.

Note:

All other libraries needed by Batik are included in the distribution. As a consequence the Batik archive is quite big, but after you downloaded it, you will not need anything else.

7. Examples of projects and products using Batik

While it is hard to track projects and products which are using Batik, here are a few ones which are known: ? The Apache Cocoon project uses Batik to rasterize SVG images. ? The Apache FOP project uses Batik to handle SVG images. It uses the SVG rasterizer

and extends the Batik transcoder architecture to offer SVG to PDF conversion. ? BitFlash Brilliance delivers a robust set of graphic-design and source-code editing tools

for fast and flexible Mobile SVG development. It uses Batik to display SVG Images. ? eDoc, a page layout software, is using the Batik SVG generator to export pages to SVG ? ElixirTech's ElixirReport uses Batik for charting and for its SVG component. ? GLIPS Graffiti is an Open Source Extensible Full Feature Native SVG Editor. ? ILOG Discovery Preview, a free visual data analysis tool letting you visualize and edit

data sets in a very wide variety of views (2D graphs and charts, various kinds of treemaps, parallel coordinates, parallel histograms and much more), uses the Batik SVG export module. ? ILOG JViews Component Suite, a product for advanced visualization, uses and extends the Batik SVG export module. ? The JFreeChart Project uses Batik to export charts in the SVG format. ? Lagoon, an XML-based framework for web site maintenance, uses the Batik SVG Rasterizer to render SVG as bitmap graphics for web publishing ? Lords Map, a program to allow players and visitors to view the current map of various campaigns. Lord Map uses Batik's SVG DOM and SVG Generator. ? Luxor XUL is a free, open-source XML User Interface Language (XUL) toolkit in Java released under the GNU GPL that supports hand-picked Mozilla XUL goodies and also includes a ultra-lightweight, multi-threaded web server, a portal engine, a scripting engine, a template engine and much more. Gerard Bauer, the Luxor project lead, has written an extensive SVG presentation.

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Batik SVG Toolkit

? OptimalJ, a UML Class Diagram Editor for NetBeans, uses Batik to export SVG. ? Oracle Corp.'s JDeveloper9i uses Batik to export class diagrams in SVG. It uses the SVG

export module (SVGGraphics2D). ? Sketsa is a vector drawing application based on SVG. With Sketsa, you can create vector

graphics that can be scaled and printed at any resolution, without losing detail or clarity. ? Svolgo,a Graph Visualisation/Transformation Framework for the Semantic Web

Cross-model transformation, node and arc diagrams, representation in SVG. This project uses Batik's SVG DOM implementation. ? Together Control Center 5.5 uses Batik to export UML diagrams in SVG. ? XML_svg2image, is a PHP class which translates svg files to png or jpeg using Batik ? XWeb, a tool to create websites automatically out of XML input. Uses the Batik SVG Rasterizer.

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