By Greg Roelofs
PNG (Portable community pix) is the next-generation pictures dossier layout for the net. Designed as an open-source structure to interchange the proprietary GIF layout, PNG is best, smaller, extra extensible, and free. Already supported by means of significant software program like Macromedia Fireworks, Adobe Photoshop, and Microsoft workplace, in addition to Netscape Navigator and Microsoft web Explorer, PNG is a chic and feature-rich photograph layout that has eventually completed wide support.
PNG: The Definitive Guide addresses the desires of either photograph designers who are looking to get the main out of the structure and programmers who are looking to upload complete PNG help to their very own applications.
In the "Using PNG" part, Roelofs covers net browsers and servers, photo audience, snapshot editors, photo converters, and 3D functions, with specific awareness to the extent of PNG aid in each one. within the "Design of PNG" part, he comprises distinctive details on compression and filtering, gamma correction and precision colour, PNG recommendations and extensions. within the "Programming PNG" part, he steps via 3 pattern courses that enforce PNG with the libpng C library.
PNG: The Definitive Guide is the 1st e-book committed solely to educating and documenting this crucial new photo layout. it truly is an critical compendium for web pages builders and programmers and is chock packed with examples, pattern code, and useful hands-on advice.
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Extra resources for PNG: The Definitive Guide
Example text
This is a perfectly valid type of PNG file, but the required palette adds up to 780 bytes of unnecessary overhead, a distinct liability for icons and other tiny images. On the other hand, a palette-based grayscale image with transparency can include a colored palette entry to be used as the background color, something that PNG does not support for true grayscale files. In addition to supporting PNG as an output format, Fireworks actually uses PNG as its native file format for day-to-day intermediate saves.
This effectively breaks the browsers' built-in PNG support (if any) and may be true of other plug-ins as well. dll (or move it elsewhere). Table 2-2. 0 No transparency, progressive display G. 0 Netscape's online programming documentation for plug-ins may be found at http://developer. com/docs/manuals/communicator/plugin/. html and http://codelab. com/quicktime/. wizards. html. zip. [14] The codelab site went offline in March 1999, and there has been no word from Siegel and Gale whether this is permanent.
1. Netscape Navigator Netscape's Navigator browser, which originally shipped standalone but more recently has been bundled as part of the Communicator suite, supplanted NCSA Mosaic late in 1994 as the standard browser by which all others were measured. 0 betas shipped later that year with animated GIF support rather than PNG. 0 did offer the possibility of platform-specific, third-party PNG support via Netscape's new plug-in interface, but only for Windows and Macintosh. Alas, even that was fatally flawed from an image-support perspective: Navigator's native image-handling code (via the HTML IMG tag) had no provision for handing off unknown image types to plug-ins.