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  • 1995-1999  (4)
  • Safari Tech Books Online  (4)
  • Sebastopol, Calif. : O'Reilly  (4)
  • 1
    Online Resource
    Online Resource
    Sebastopol, Calif. : O'Reilly | Boston, MA :Safari,
    Language: English
    Pages: xiv, 454 p. , ill. ; , 24 cm
    Keywords: GIMP (Computer file) ; Computer graphics ; Perl (Computer program language) ; Web sites ; Design ; Electronic books ; local
    Abstract: 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. It is a little documented field, however, and the many valuable free libraries and tools available on the Internet remain under-utilized. Programming Web Graphics with Perl & GNU Software is aimed at intermediate and advanced Web users who want to use CGI scripts to generate dynamic graphic content. It will also help to demystify the manipulation of graphics formats for newcomers to the Web. Programming Web Graphics with Perl & GNU Software takes a practical, resource-like approach to the content. It is not a book about design or aesthetics of Web graphics; its focus is on programming or, more accurately, scripting programs that manipulate graphics file to be published on the Web. Most of the examples in the book use Perl as a scripting language, though the concepts are applicable to any programming language. However, several powerful Perl modules for generating graphics (GD, PerlMagick, GIFgraph) should help position Perl as a major contender for your Web graphics applications. Most of the topics covered in the book are applicable to any platform (NT, Linux, Un*x, MaxOS), with the exception of the chapter detailing the Gnu Image Manipulation Program (a free Adobe Photoshop-like application), which requires a connection to an X server. The focus is always on free software, when it is available. This book covers the following: 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 lets you easily script plug-ins or interface to the GIMP via the Web the creation of image maps from data extracted from a database the implementation of several new Perl modules for the creation of neatly formatted PostScript files details on interfacing to a fax gateway reusable recipes for many popular applications such as Web counters and Web cams the creation of animated GIFs on-the-fly One of the key ingredients to the success of the Web is that anyone who wanted to could participate in publishing to the wo...
    Note: Includes index
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  • 2
    Online Resource
    Online Resource
    Sebastopol, Calif. : O'Reilly | Boston, MA :Safari,
    Language: English
    Pages: xvi, 357 p. , ill. ; , 23 cm
    Edition: 1st ed.
    Keywords: Tk toolkit ; Perl (Computer program language) ; Electronic books ; local
    Abstract: Learning Perl/Tk is a tutorial for Perl/Tk, the extension to Perl for creating graphical user interfaces. With Tk, Perl programs can be window-based rather than command-line based, with buttons, entry fields, listboxes, menus, and scrollbars. Originally developed for the Tcl language, the Perl port of the Tk toolkit liberates Perl programmers from the world of command-line options, STDIN, and STDOUT, allowing them to build graphical, event-driven applications for both Windows and UNIX. This book is aimed at Perl novices and experts alike. It explains the reasoning behind event-driven applications and drills in guidelines on how to best design graphical applications. It teaches how to implement and configure each of the Perl/Tk graphical elements step-by-step. Special attention is given to the geometry managers, which are needed to position each button, menu, label and listbox in the window frame. Although this book does not teach basic Perl, anyone who has written even the simplest Perl program should be able to learn Tk from this book. The writing is breezy and informal, and gets right to the point of what you need to know and why. The book is rife with illustrations that demonstrate how each element is drawn and how its configuration options affect its presentation. Learning Perl/Tk is for every Perl programmer who would like to implement simple, easy-to-use graphical interfaces.
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  • 3
    Online Resource
    Online Resource
    Sebastopol, Calif. : O'Reilly | Boston, MA :Safari,
    Language: English
    Pages: xxviii, 1227 p. , ill. ; , 23 cm
    Edition: 1st ed.
    Series Statement: Java series
    DDC: 005.13/3
    Keywords: Java (Computer program language) ; Electronic books ; local
    Abstract: The Swing classes eliminate Java's biggest weakness: its relatively primitive user interface toolkit. Swing provides many new components and containers that allow you to build sophisticated user interfaces, far beyond what was possible with AWT. The old components have been greatly improved, and there are many new components, like trees, tables, and even text editors. It also adds several completely new features to Java's user interface capabilities: drag-and-drop, undo, and the ability to develop your own "look and feel," or the ability to choose between several standard looks. The Swing components are all "lightweight," and therefore provide more uniform behavior across platforms, making it easier to test your software. All these new features mean that there's a lot to learn. Swing is undoubtedly way ahead of AWT -- or, for that matter, any widely available user interface toolkit -- but it's also a lot more complicated. It's still easy to do simple things. But once you've seen what's possible, you won't want to do the simple things. Java Swing gives you in-depth coverage of everything you need to know to take full advantage of Swing, providing detailed descriptions of every class and interface in the key Swing packages. It shows you how to use all of the new components, allowing you to build state-of-the-art user interfaces. It also discusses how the components implement the MVC (Model View Controller) architecture, so you can understand how the components are designed and subclass them intelligently. Finally, it shows how to create your own "look and feel." Throughout, Java Swing focuses on giving you the context you need to understand what you're doing. It's more than documentation; Java Swing helps you develop code quickly and effectively. Whether you're a serious Java developer, or just trying to find out what Java can do, you'll find Java Swing an indispensable guide.
    Note: Jan. 1999 printing has Java 1.2 on cover and spine; May 1999 printing has Java 2 on cover and spine
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  • 4
    Online Resource
    Online Resource
    Sebastopol, Calif. : O'Reilly | Boston, MA :Safari,
    Language: English
    Pages: xvi, 344 p. , ill. ; , 23 cm
    Series Statement: Java series
    Keywords: Cryptography ; Java (Computer program language) ; Electronic books ; local
    Abstract: Cryptography, the science of secret writing, is the biggest, baddest security tool in the application programmer's arsenal. Cryptography provides three services that are crucial in secure programming. These include a cryptographic cipher that protects the secrecy of your data; cryptographic certificates, which prove identity (authentication); and digital signatures, which ensure your data has not been damaged or tampered with.This book covers cryptographic programming in Java. Java 1.1 and Java 1.2 provide extensive support for cryptography with an elegant architecture, the Java Cryptography Architecture (JCA). Another set of classes, the Java Cryptography Extension (JCE), provides additional cryptographic functionality. This book covers the JCA and the JCE from top to bottom, describing the use of the cryptographic classes as well as their innards.The book is designed for moderately experienced Java programmers who want to learn how to build cryptography into their applications. No prior knowledge of cryptography is assumed. The book is peppered with useful examples, ranging from simple demonstrations in the first chapter to full-blown applications in later chapters.Topics include: The Java Cryptography Architecture (JCA) The Java Cryptography Extension (JCE) Cryptographic providers The Sun key management tools Message digests, digital signatures, and certificates (X509v3) Block and stream ciphers Implementations of the ElGamal signature and cipher algorithms A network talk application that encrypts all data sent over the network An email application that encrypts its messages Covers JDK 1.2 and JCE 1.2.
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