ViewML -- an open source embedded Linux web browser

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(Last updated: Jul. 13, 2000)

ViewML (Viewable Markup Language) is the first freely available, open source web browser targeted specifically at the embedded Linux platform. The web browser, known as The ViewML Project will be developed and maintained with source code made available to the public, as well as with contributions from the embedded Linux community.

As of now, the ViewML browser along with it's interface requires 2.1 MB of RAM, with a small disk image foot-print requiring only 760K.

The ViewML Project selected the KDE Desktop's kfm HTML display engine because of its superior design and display capabilities. The HTML engine was extracted, then ported, using a thin glue layer ( see "Glue layers simplify porting graphics apps," here), to the small but fast FLTK (Fast Light Tool Kit, www.fltk.org) applications framework to keep the RAM usage extremely small, but still allows us to fully implement all of the necessary user interface controls.

The ViewML Browser runs on both Microwindows, the leading embedded windowing environment (www.microwindows.org), as well as the X Window system. We view the support for both Microwindows and the X Window System as being essential, since the choice of the graphical windowing system may sometimes not be in the control of the designer. The X Window System, of course, brings great portability across a vast array of machine architectures, and a large set of already running applications. Recently, there has been a lot of work at significantly bringing the size of the X Window System down for embedded devices. For even smaller devices, and for applications not requiring the complexity of X and all that comes with it, the Microwindows Project is a great choice.

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