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authormarha <marha@users.sourceforge.net>2011-08-29 08:51:20 +0200
committermarha <marha@users.sourceforge.net>2011-08-29 08:51:20 +0200
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xwininfo libX11 libXmu libxcb mesa xserver xkeyboard-config git update 29
aug 2011
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-<HTML>
-
-<TITLE>Mesa glFBDev Driver</TITLE>
-
-<link rel="stylesheet" type="text/css" href="mesa.css"></head>
-
-<BODY>
-
-<center><H1>Mesa glFBDev Driver</H1></center>
-
-
-<H1>1. Introduction</H1>
-
-<p>
-The GLFBDev driver interface allows one to do OpenGL rendering into a
-framebuffer managed with the Linux's fbdev interface.
-</p>
-
-<p>
-Basically, the programmer uses the fbdev functions to initialize the
-graphics hardware and setup the framebuffer.
-Then, using a calls to Mesa's glFBDev API functions, one can render
-into the framebuffer with the OpenGL API functions.
-</p>
-
-<p>
-Note, only software rendering is supported; there is no hardware
-acceleration.
-</p>
-
-
-<p>
-The GL/glfbdev.h header file defines the glFBDev interface.
-</p>
-
-<p>
-The progs/fbdev/glfbdevtest.c demonstrates how to use the glFBDev interface.
-</p>
-
-
-<p>
-For more information about fbdev, see the
-<a href="http://www.tldp.org/HOWTO/Framebuffer-HOWTO.html" target="_parent">
-Framebuffer Howto</a>
-</p>
-<p>
-You will need at minimum, a framebuffer device, check /dev/fb0
-</p>
-
-<h1>2. Compilation</h1>
-
-<p>
-To compile Mesa with support for the glFBDev interface:
-<pre>
- make realclean
- make linux-fbdev
-</pre>
-
-<p>
-When compilation is finished look in progs/glfbdev/ for the glfbdevtest demo.
-</p>
-<h1>3. Permissions</h1>
-
-<p>
-Typically /dev/fb/0 is grouped to the video group. It may be useful to add
-your user to the video group so the demos will not have to be run as root.
-To use fbdevglut with the prefered tty input, you should add the user to the
-tty group as well
-<p>
-
-<h1>4. Using fbdevglut</h1>
-Almost all of the programs in the progs directory use glut, and they compile with fbdevglut.
-
-<p>
-To compile the redbook sample programs:
-<pre>
- cd progs/redbook
- make
-</pre>
-</p>
-<p>glut features not supported:
-<li>Overlays
-<li>Subwindows
-<li>Input devices other than Keyboard/Mouse
-<li>No support for GLUT_MULTISAMPLE, GLUT_STEREO, or GLUT_LUMINANCE
-<li>Cursor and Menu Support will flicker in GLUT_SINGLE mode
-
-<p>Keyboard input is read by opening /dev/tty and reading keycodes in medium raw mode.
-<p>Mouse input is read from env var MOUSE, or /dev/gpmdata and should be in ms3 format.
-To forward data in this format to /dev/gpmdata, run gpm with the -Rms3 option.
-<p> glutInit allows glut programs to pass parameters to the glut library, currently the
-following options are supported for fbdevglut:
-<p><li>-geometry widthxheight -- This will force the resolution to be widthxheight instead of autodetecting.
-The modes are read from /etc/fb.modes
-<p><li>-bpp -- This will force the bitdepth to the one specified
-<p><li>-vt -- This allows you to specify the virtual terminal to attach keyboard input to. It is useful to specify when running inside screen.
-<p><li>-mousespeed -- A floating point multiplication factor to increase mouse speed
-<p><li>-nomouse -- Disable mouse support
-<p><li>-nokeyboard -- Disable keyboard support (this will probably break mouse support as well)
-<p><li>-stdin -- Use stdin for input instead of attaching to kbd in medium-raw mode.
-This will make it impossible to detect keypresses like Shift+Tab, you will also need to specify -gpmmouse for mouse support. This option can be used with a debugger, and it is possible to single step a program with gdb and set the FRAMEBUFFER environment variable to a different framebuffer for display. The program will not be able to handle vt switching on it's own, so it will always display.
-<p><li>-gpmmouse -- This will attempt to connect to the /dev/gpmctl socket using liblow
-for mouse data. Gpm does not provide this data when in graphics mode, so vt switching
-will briefly display text. This mode typically has no initial mouse delay.
-<p><li>-- Ignore any additional arguments
-<p>Notes:
-<p>
-1. The mouse pointer flickers in single buffering mode, as it must be rendered in software. Hopefully in the future there will be a way to access hardware cursors in fbdev devices.
-</p>
-</body>
-</html>