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https://gitlab.freedesktop.org/mesa/mesa.git
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224 lines
5.3 KiB
HTML
224 lines
5.3 KiB
HTML
<HTML>
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<TITLE>Mesa fbdev/DRI Environment</TITLE>
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<BODY text="#000000" bgcolor="#55bbff" link="#111188">
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<center><H1>Mesa fbdev/DRI Drivers</H1></center>
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<H1>1. Introduction</H1>
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<p>
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The fbdev/DRI sub-project within Mesa brings hardware accelerated OpenGL
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rendering to the Linux fbdev environment.
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The X Window System / XFree86 is not needed.
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</p>
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<p>
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Basically, the <a href="http://dri.sf.net/">DRI</a> drivers for hardware
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accelerated OpenGL for XFree86 have been ported to fbdev so that X is
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not needed.
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This means fbdev/DRI works in full-screen mode only.
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</p>
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<p>
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DRI driver writers may find this simplified environment easier to work in,
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compared to the full XFree86/DRI environment.
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</p>
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<p>
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Much of the work for this project has been done by Jon Smirl and
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Keith Whitwell.
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</p>
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<p>
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To use fbdev/DRI, you'll need a Linux 2.4 or 2.6 kernel.
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</p>
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<p>
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The fbdev/DRI Mesa code is in the Mesa CVS trunk (to be released as Mesa
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5.1 in the future).
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</p>
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<h1>2. Compilation</h1>
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<p>
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Assuming you're starting with a fresh Mesa CVS checkout, do the following:
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</p>
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<pre>
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cd Mesa-newtree
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cp Makefile.X11 Makefile # or use a symlink
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make linux-solo
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</pre>
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<p>
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When this is finished, check the <code>Mesa-newtree/lib</code> directory
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to verify that the following files were made:
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</p>
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<ul>
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<li><code>libGL.so.1.2</code> - the client-side OpenGL library
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(and a few symlinks to it).
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<li><code>libGLU.so.1.1</code> - the GLU library (and a few symlinks to it).
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<li><code>libglut.so.3.7</code> - the GLUT library (and a few symlinks to it).
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<li><code>mga_dri.so</code> - DRI driver for Matrox G200/G400 cards.
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<li><code>r128_dri.so</code> - DRI driver for ATI Rage 128 cards.
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<li><code>r200_dri.so</code> - DRI driver for ATI R200 Radeon cards.
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<li><code>radeon_dri.so</code> - DRI driver for original ATI Radeon cards.
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<li><code>fb_dri.so</code> - software-only fbdev driver.
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<li><code>miniglx.conf</code> - configuration file for the MiniGLX interface
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</ul>
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<h1>3. Using fbdev/DRI</h1>
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<p>
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If XFree86 is currently running, exit/stop the X server so you're
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working from the console.
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</p>
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<h2>3.1 Kernel Modules</h2>
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<p>
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You'll need to load kernel modules specific to your graphics hardware.
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The following kernel modules should be included with your kernel.
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</p>
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<p>
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If you have ATI Radeon/R200 hardware, run as root:
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</p>
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<pre>
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modprobe agpgart # the AGP GART module
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modprobe radeonfb # the Radeon fbdev driver
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modprobe radeon # the Radeon DRI kernel module
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</pre>
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<p>
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If you have ATI Rage 128 hardware, run as root:
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</p>
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<pre>
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modprobe agpgart # the AGP GART module
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modprobe aty128fb # the Rage 128 fbdev driver
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modprobe r128 # the Rage 128 DRI kernel module
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</pre>
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<p>
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If you have Matrox G200/G400 hardware, run as root:
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</p>
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<pre>
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modprobe agpgart # the AGP GART module
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modprobe mgafb # the Matrox fbdev driver
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modprobe mga # the Matrox DRI kernel module
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</pre>
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<p>
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Then run <code>lsmod</code> to be sure the modules are loaded.
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For a Radeon card, you should see something like this:
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</p>
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<pre>
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Module Size Used by Not tainted
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radeon 110308 0 (unused)
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radeonfb 21900 0 (unused)
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agpgart 43072 1
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</pre>
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<h2>3.2 Configuration File</h2>
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<p>
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The <code>Mesa-newtree/lib/miniglx.conf</code> file should be installed
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in <code>/etc/</code>.
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</p>
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<p>
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Edit <code>/etc/miniglx.conf</code> to be sure it's set up correctly
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for your hardware.
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Comments in the file explain the options.
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</p>
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<h2>3.3 Running fbdev/DRI Programs</h2>
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<p>
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Make sure your LD_LIBRARY_PATH environment variable is set to the
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<code>Mesa-newtree/lib/</code> directory.
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</p>
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<p>
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Change to the <code>Mesa-newtree/progs/miniglx/</code> directory and
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start the sample_server program in the background:
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</p>
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<pre>
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./sample_server &
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</pre>
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<p>
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Then try running the <code>miniglxtest</code> program:
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</p>
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<pre>
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./miniglxtest
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</pre>
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<p>
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You should see a rotating quadrilateral which changes color as it rotates.
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It will exit automatically after a bit.
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</p>
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<p>
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If you run other tests in the miniglx/ directory, you may want to run
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them from a remote shell so that you can stop them with ctrl-C.
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</p>
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<h1>4.0 Troubleshooting</h1>
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<p>
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If you try to run miniglxtest and get the following:
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</p>
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<pre>
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[miniglx] failed to probe chipset
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connect: Connection refused
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server connection lost
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</pre>
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<p>
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It means that the sample_server process is not running.
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</p>
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<h1>5.0 Programming Information</h1>
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<p>
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The full OpenGL API is available with fbdev/DRI.
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</p>
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<p>
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OpenGL/Mesa is interfaced to fbdev via the <a href="MiniGLX.html">MiniGLX</a>
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interface.
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MiniGLX is a subset of Xlib and GLX API functions which provides just
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enough functionality to setup OpenGL rendering and respond to simple
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input events.
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</p>
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<p>
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Since MiniGLX is a subset of the usual Xlib and GLX APIs, programs written
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to the MiniGLX API can also be run on full Xlib/GLX implementations.
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This allows some degree of flexibility for software development and testing.
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</p>
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<p>
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However, the MiniGLX API is not binary-compatible with full Xlib/GLX.
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Some of the structures are different and some macros/functions work
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differently.
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See the <code>GL/miniglx.h</code> header file for details.
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</p>
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</body>
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</html>
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