Programming, Nutshell, Software, GRAPHICS, Perl, O'Reilly
Programming Web Graphics with Perl & GNU Software (O'Reilly Nutshell)





From access counters and log-report graphs to scientific plots and on-the-fly animated GIFs, graphics scripting is within the grasp of most Web authors. However, it is a poorly documented field. Programming Web Graphics with Perl & GNU Software shows intermediate and advanced Web designers how to use CGI scripts to generate dynamic graphic content and demystifies the manipulation of graphics formats for newcomers to the Web. This book includes:

• A tour through the most popular Web graphics file formats by implementing parsers for GIF, JPEG, and PNG files
• Descriptions of the PNG, JPEG, and giflib libraries, as well as many other free and proprietary libraries and SDKs
• Extensive documentation and examples using the Perl graphics modules GD and GIFgraph, and the Perl interface to the powerful ImageMagick libraries
• Documentation on the Gnu Image Manipulation Program (GIMP) and the Perl interface that allows you to easily script plug-ins or interface to the GIMP via the Web
• The implementation of several new Perl modules for creating formatted PostScript files and animated GIFs on-the-fly

Programming Web Graphics with Perl & GNU Software is not a book about design or aesthetics of Web graphics; its focus is on programming, specifically, on scripting programs that manipulate graphics files to be published on the Web. Most examples use Perl, though the concepts are applicable to any programming language. And most of the topics apply to any platform. A handy reference for programmers and designers who want to learn how to create dynamic graphics using CGI scripts.As a how-to book, Programming Web Graphics with Perl & GNU Software covers a narrow but powerful niche of Web development--on-the-fly graphics generation. It also focuses on the Perl language and its associated free code modules, making the techniques you learn in this book immediately available for free.

Author Shawn P. Wallace begins with a look at the popular image formats on the Web: GIF, PNG, and JPEG. This chapter offers a quick and fascinating demystification of these critical graphics file types. The next chapter discusses the dance between graphics and Web browsers, with a look at CGI, HTML display, color schemes, and other details.

Among the tools discussed in this book is the GD Perl module for working with GIF files, the GNU Image Manipulation Program (GIMP), GIFScript, and ImageMagick. The author uses a chessboard simulation application to illustrate how to manipulate graphics dynamically. Some sections focus on graphing, animation, and image maps to illustrate the flexibility of dynamic graphics.

Near the end of the book, the author presents a "Web graphics cookbook"--a collection of examples you can use in your sites that includes a graphical Web counter, a JavaScript rollover menu, image thumbnailing scripts, and more. The author finishes with a discussion of creating and integrating PostScript code.

This guide reads more like a brain dump from the author than a comprehensive discussion of Web graphics; however, there's much to be gleaned from his knowledge. --Stephen W Plain









Price: $ 8.98









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