Graphics Programming with Perl is a guide to the graphics and imaging modules and tools available to the Perl programmer. It covers subjects ranging from. Graphics Programming with Perl - Manning pdf - Ebook download as PDF File .pdf), Text File .txt) or read book online. How to Write a Better Thesis What Is a Thesis? David Evans†, Paul Gruba, Justin Zobel · Download PDF Chapter. Page.
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Geared toward Perl users and webmasters, Perl Graphics Programming and PDF--then you'll explore the most powerful tools and Perl modules available for. Perl Graphics Programming. Shawn Wallace Part I. Raster Images and Web Graphics. 1. Creating Creating PDF Documents with Perl. Perl. Graphics. Programming. Shawn Wallace. Creating SVG, SWF (Flash), JPEG , and PNG The Perl interface consists of 14 modules in the SWF namespace.
About this title Graphics programmers aren't the only ones who need to be proficient with graphics. Web and applications programmers know that a dull web page can be quickly transformed into one that's interesting and lively with the use of well-planned graphics. And fortunately, you don't need the skills of a fulltime graphics programmer to use graphics effectively. 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 programmers. Using open source software, like Perl, you have the power to dynamically generate graphics based on user input and activity, easily manipulate graphics content, and optimize graphics for compression and quality. Geared toward Perl users and webmasters, Perl Graphics Programming focuses on open-source scripting programs that manipulate graphics files for use on the Web. The book demystifies the manipulation of graphics formats for newcomers to the Web with a practical, resource-like approach.
Using open source software, like Perl, you have the power to dynamically generate graphics based on user input and activity, easily manipulate graphics content, and optimize graphics for compression and quality.
Geared toward Perl users and webmasters, Perl Graphics Programming focuses on open-source scripting programs that manipulate graphics files for use on the Web. The book demystifies the manipulation of graphics formats for newcomers to the Web with a practical, resource-like approach.
Included in this part of the book is a thorough description of the Ming module for creating on-the-fly Flash files. Next, a "cookbook" section includes practical, all purpose recipes: GIF animation, generating images within a dynamic application, communicating between SWF front-end and Perl back-end, XSLT transformations, compression, and much more.
Perl programmers naturally turn to Perl to tackle whatever challenge they have at hand, and graphics programming is no exception.
It also gets invoked if the user asks explicitly for -help on the command line. Any good command line application should be written that way. It can store these arguments as arrays infile, pages , hashes, or scalars. It also supports type checking. If everything is fine, it calls the CombinePDFs::createPDF subroutine, passing the array of input files, the array of page ranges, and the bookmarks information.
The bookmarks scalar is optional.
Page ranges can be comma-separated ranges ,14, , single pages, or the all token. You can include the same page several times in the same document. Although PDF , by Antonio Rosella, also provides such a method, this package was not developed with the use strict pragma and gives a lot of warnings.
Furthermore, the package is not actively maintained, so there seems to be no chance to fix this in the near future. Please note that PDF::Reuse is not an object oriented package. Therefore the CombinePDFs package is not object oriented, either.
A user of this package could create several instances, but all instances work on the same PDF file. Submitting complex data structures via the command line is a difficult issue, so I decided that bookmarks should come from a text file. Children of the root bookmarks have a level of 1, their children a level of 2, and so on.
Bookmarks are an array of hashes. Here it is the page number to open. During the loop over the file content, the code searches for each level the last entry in a variable and pushes its related children on those last entries. The root bookmarks get collected as an array, and the loop adds the children as a reference to an array, and so on for the grand children.
In order to enable this feature until a new release will appear I included a modified version of PDF::Reuse in the examples zip file that accompanies this article.
The GD:: Manipulating pixels and transparency GD and pixels Removing duplicate color palette entries. Magick and pixels Rotating RGB values. Convolution Convolution with Image:: Using Image:: Alpha channels and transparency Transparency and the GD module. Transparency and Image:: How to view partially transparent images.
Fast manipulation of image pixels Using Inline:: Appendix A: Appendix B: Color space conversion algorithms. Appendix C: Module code.
About the Technology An increasing number of tasks in application programming and web design requires creating and manipulating graphics. What's inside How to create charts and graphs Serving graphics content to the WWW with CGI How to modularize your graphics code, and re-use it Code to manipulate image pixels and how to do it fast How to work with text in graphics A complete reference for Image:: Magick Examples you can use and build on: Adding watermarks to your images Creating thumbnails Dynamic web pages with charts Building your own convolution filters A web photo album 3D animation with OpenGL and Renderman.
About the author A developer, architect and systems administrator, Martien Verbruggen is the author of the GD:: Graphics Programming with Perl combo added to cart.
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