| DirectFB | |||
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| Platforms: | Qtopia Core | ||
| Qt version: | 4.3.0 | ||
| License: | GPL | ||
| Depends on: | DirectFB v1.0.0 | ||
DirectFB blogs | |||
Subversion:
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DirectFB is a thin library that provides hardware graphics acceleration on Linux without bindings to X11 or any other windowing system. This makes it popular in smaller systems such as set-top boxes. It is, however, not a GUI toolkit providing you with high level widgets needed for rich graphical applications. The DirectFB screen driver plugin for Qtopia Core enables use of hardware acceleration while still having the full Qt API to work with.
Before you start you need to have a working installation of DirectFB. Take a look at http://www.directfb.org for downloads and installation instructions.
Of course you also need a build of Qtopia Core.
Download the source code:
svn checkout svn://labs.trolltech.com/svn/qtopia/directfb
The driver relies on so-called private header files within the Qtopia Core source. These are header files that are not available after Qtopia Core has been installed. You must therefore tell qmake to locate headers in the Qtopia Core source directory, and not in the headers installed on your system. The next commands assumes you've downloaded and unpacked the Qtopia Core source in $QTSRCDIR.
cd directfb
${QTSRCDIR}/bin/qmake -recursive -cache ${QTSRCDIR}/.qmake.cache
make && make install
At this point you should find the following files in your Qtopia Core installation directory:
plugins/gfxdrivers/libqdirectfbscreen.so, plugins/kbddrivers/libqdirectfbkeyboard.so, plugins/mousedrivers/libqdirectfbmouse.so
To start an application using the new driver, either set the environment variable QWS_DISPLAY=directfb, or run your application with the -display argument. E.g:
myapp -display directfb
If you're only seeing a message saying "directfb: driver not found" you'll hopefully get some more information about what went wrong by setting the environment variable QT_DEBUG_PLUGINS=1 before running your application.
The driver has been integrated into the Qtopia Core 4.4 source tree and should be available in the 4.4 daily snapshots. The subversion repository is no longer maintained.
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