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DIRECTFBRC(5)		     DirectFB Manual Pages		 DIRECTFBRC(5)

       directfbrc - DirectFB configuration file

       The directfbrc file is a configuration file read by all DirectFB appli‐
       cations on startup.  There are two of these: a system-wide  one	stored
       in  /etc/directfbrc and a per-user $HOME/.directfbrc which may override
       system settings.

       The same parameters that can be used in the directfbrc file can also be
       passed  to  DirectFB applications on the command-line by prefixing them
       with --dfb:

       The directfbrc file contains  one  parameter  per  line.	 Comments  are
       introduced  by a hash sign (#), and continue until the end of the line.
       Blank lines are ignored.

       Most parameters are switches that turn  certain	features  on  or  off.
       These  switches have a no- variant that disables the feature. This man-
       page describes the positive variant and will also note which setting is
       the compiled-in default.

       The following parameters may be specified in the directfbrc file:

	      Specifies	 the graphics system to use. The default is to use the
	      Linux frame buffer (fbdev) but you can also run DirectFB	appli‐
	      cations  on  SDL	(sdl).	Other  systems	might  be added in the

	      Opens the given frame buffer device instead of /dev/fb0.

	      Specify the bus location of the card. The option is only used if
	      DirectFB	doesn't	 have  sysfs  support and if unspecified 1:0:0
	      will be assumed.	Use this option if the driver fails to	detect
	      (or incorrectly detects) your card.

	      Sets the default screen resolution. If unspecified DirectFB will
	      use the first mode from /etc/fb.modes Some frame buffer  devices
	      (namely vesafb) don't support mode switches and can only be used
	      in the resolution that is set on boot time.

	      Sets the default pixel depth in bits per pixel.  If  unspecified
	      DirectFB	will  use  the	depth specified in the first mode from
	      /etc/fb.modes DirectFB supports color depths of 8,  15,  16,  24
	      and  32.	Which values are available depends on the frame buffer
	      device you are using. Some frame buffer devices (namely  vesafb)
	      don't  support  mode switches at all and can only be used in the
	      pixel depth that is set at boot time.

	      Sets the default pixel format. This  is  similar	to  the	 depth
	      parameter	 described above but allows more fine-grained control.
	      Possible values for pixelformat are LUT8, RGB332,	 RGB16,	 RGB24
	      and  RGB32.  Some drivers may also support the more exotic pixel
	      formats A8, ALUT44, ARGB, ARGB1555, I420, UYVY, YUY2 and YV12.

	      Selects the multi application world which is joined or  created.
	      Starting	with  zero,  negative  values  force creation of a new
	      world using the lowest unused session number. This will override
	      the environment variable "DIRECTFB_SESSION".

	      Select the remote session to connect to.

	      Selects  which  layer  is	 the  "primary	layer", default is the
	      first.  Check 'dfbinfo' for a list of layers supported  by  your

	      Uses the given directory (tmpfs mount point) for creation of the
	      shared memory file in multi application  mode.  This  option  is
	      only  useful  if	the  automatic detection fails or if non-tmpfs
	      storage is desired.

	      With this	 option	 the  probing  of  memcpy()  routines  can  be
	      skipped, saving a lot of startup time. Pass "help" for a list of
	      possible values.

       quiet  Suppresses console output from  DirectFB.	 Only  error  messages
	      will be displayed.

	      Enables the output of the DirectFB banner at startup. This is on
	      by default.

	      Enables debug output. This is on by default but  you  won't  see
	      any  debug  output  unless  you compiled DirectFB with debugging

	      Enable stack trace support. This is on by default but you	 won't
	      see  any	trcae  output  unless you compiled DirectFB with trace

	      Write all messages to the specified file.

	      Send all messages via UDP to the specified host and port.

	      Abort on NONE, ASSERT (default) or ASSUME (incl. assert)

	      Forces the primary surface to be a window. This  allows  to  run
	      applications  that  were	written	 to do full-screen access in a

	      Forces the primary surface to be the background surface  of  the

	      Turns hardware acceleration on. By default hardware acceleration
	      is auto-detected. If  you	 disable  hardware  acceleration,  the
	      driver  for  your graphics card will still be loaded and used to
	      access additional display layers (if there  are  any),  but  all
	      graphics operations will be performed by the software renderer.

	      Turns  DMA  acceleration	on,  if	 supported  by	the driver. By
	      default DMA acceleration is off.

	      Flushes all disk buffers before initializing DirectFB. This  can
	      be  useful  if  you working with experimental device drivers and
	      expect crashes. The default is not to sync.

	      The no-mmx options allows to disable the	use  of	 MMX  routines
	      even  if support for MMX was detected. By default MMX is used if
	      is available and support for MMX was compiled in.

	      Turns AGP memory support on. The option enables  DirectFB	 using
	      the  AGP	memory to extend the amount of video memory available.
	      You can specify the AGP mode to use (e.g. 1, 2, 4,  8  or	 0  to
	      disable agp). By default AGP memory support is off.

	      Specify  the  font  format  to  use. Possible values are A1, A8,
	      ARGB, ARGB1555, ARGB2554, ARGB4444, AiRGB. The default font for‐
	      mat  is A8 because it is the only format that ensures high qual‐
	      ity, fast rendering and low memory consumption at the same time.
	      Use this option only if your fonts looks strange or if font ren‐
	      dering is too slow.

	      By default DirectFB installs a signal handler for	 a  number  of
	      signals  that  cause an application to exit. This signal handler
	      tries to deinitialize the DirectFB engine	 before	 quitting  the
	      application.  Use this option to enable/disable this feature.

	      As  described  with  the	sighandler option, DirectFB installs a
	      signal handler for a number of signals.  By  using  this	option
	      you may specify a list of signals that shouldn't be handled this

	      By default DirectFB checks if the application has	 released  all
	      allocated	 resources  on	exit.  If  it didn't, it will clean up
	      after the application.  This option allows to switch  this  fea‐
	      ture on or off.

	      This  option  activates  blocking	 of  all  signals,  useful for
	      DirectFB daemons (a DirectFB master application that does	 noth‐
	      ing except being the master).

	      By  default  DirectFB  allocates	a  new	virtual	 terminal  and
	      switches to it.

	      Allow to switch virtual terminals using <Ctrl>+<Alt>+<F?>.  This
	      is an experimental feature that is usually disabled; use at your
	      own risk.

	      Puts the virtual terminal	 into  graphics	 mode.	This  has  the
	      advantage	 that  kernel  messages	 won't	show up on your screen
	      while the DirectFB application is running.

	      Use VT handling code at all?

	      Specify the serial mouse device.

	      Enables using GPM as mouse input repeater.

	      Usually DirectFB compresses mouse motion events. This means that
	      subsequent  mouse	 motions are delivered to the application as a
	      single mouse motion event. This leads to a more  responsive  but
	      less exact mouse handling.

	      Specifies the mouse protocol to use. The following protocols are

	      MS Two button mouse using the Microsoft mouse protocol.

	      MS3 Three button mouse using an extended Microsoft mouse	proto‐

	      MouseMan	Three  button mouse using a different extension to the
	      Microsoft mouse protocol introduced by Logitech.

	      MouseSystems The most commonly used protocol  for	 three	button

	      PS/2 Two/three button mice of the PS/2 series.

	      IMPS/2  Two/three button USB mice with scrolling wheel using the
	      Microsoft Intellimouse protocol.

	      The different protocols for serial mice are  described  in  more
	      detail in mouse(4).

	      Swaps left and right mouse buttons. Useful for left-handers.

	      Map the CapsLock key to Meta. Useful for users of the builtin WM
	      without a Meta key on the keyboard (e.g. Window key).

	      By default DirectFB shows a mouse	 cursor	 when  an  application
	      makes  use  of  windows. This option allows to switch the cursor
	      off permanently.	Applications cannot enable it explicitly.

	      Ignore all non-IR Linux Input devices.

	      Suppress loading of this module. The module name is the filename
	      without the libdirectfb_ prefix and without extension (for exam‐
	      ple keyboard to disable loading of the keyboard input module).

	      Specify the window manager to use.

	      Completely disables background handling. Doesn't make much sense
	      since the mouse and moving windows will leave ugly traces on the

	      Controls the color of the background. The color is specified  in
	      hexadecimal  notation.  The alpha value defaults to full opacity
	      and may be omitted. For example to choose a bright magenta back‐
	      ground, you'd use bg-color=FF00FF.

	      Fills  the  background with the given image from file. The image
	      is stretched to fit to the screen dimensions.

	      Like bg-image but tiles the image to fit to  the	screen	dimen‐
	      sions instead of stretching it.

	      By  default  DirectFB windows may be translucent. If you disable
	      this feature, windows are forced to be either  fully  opaque  or
	      fully  transparent. This is useful if your graphics card doesn't
	      support alpha-transparent blits.

	      Enables window decorations if supported by the window manager.

	      Limits the amount of Video RAM used by DirectFB. The  amount  of
	      Video RAM is specified in Kilobytes.

	      Limits  the amount if AGP memory used by DirectFB. The amount of
	      AGP memory is specified in Kilobytes.

	      Controls the signal produced by the TV output of Matrox cards.

	      Some older Matrox G400 cards have SGRAM and a number of graphics
	      operations  are  considerably faster on these cards if this fea‐
	      ture is enabled. Don't try to enable it  if  your	 card  doesn't
	      have SGRAM!  Otherwise you'd have to reboot.

	      If  you  have a dual head G400/G450/G550 you can use this option
	      to enable additional layers using the second head.

	      If specified DirectFB will dump the screen contents in PPM  for‐
	      mat into this directory when the <Print> key gets pressed.

	      Override	the  hardware  revision	 number	 used by the Unichrome

	      Allows to control where window surfaces  are  stored.  Supported
	      values for <policy> are:

	      auto  DirectFB  decides depending on hardware capabilities. This
	      is the default.

	      videohigh Swapping system/video with high priority.

	      videolow Swapping system/video with low priority.

	      systemonly Window surfaces are stored in system memory.

	      videoonly Window surfaces are stored in video memory.

	      Allows to control the desktop buffer mode. Whenever a window  is
	      moved,  opened,  closed, resized or its contents change DirectFB
	      recomposites the window stack at the affected  region.  This  is
	      done  by	blitting  the windows together that are visible within
	      that region. Opaque windows are blitted directly while  translu‐
	      cent  windows  are blitted using alpha blending or color keying.
	      If there's a back buffer the recomposition is not visible	 since
	      only the final result is copied into the front buffer. Without a
	      back buffer each step of the  recomposition  is  visible.	  This
	      causes noticeable flicker unless all windows are opaque.

	      Supported values for <mode> are:

	      auto  DirectFB  decides depending on hardware capabilities. This
	      is the default. DirectFB chooses a back buffer in	 video	memory
	      if  the  hardware supports simple blitting (copying from back to
	      front buffer). If there's no acceleration at all the back buffer
	      is  allocated in system memory since that gives much better per‐
	      formance for alpha blended recomposition in software and	avoids
	      reading  from  the video memory when the result is copied to the
	      front buffer.

	      backsystem The back buffer is allocated in system	 memory.  This
	      is  the  recommend choice if your hardware supports simple blit‐
	      ting but no alpha blending and you are going to have many	 alpha
	      blended windows.

	      backvideo	 Front	and back buffer are allocated in video memory.
	      It's not required to set this mode explicitly because the 'auto'
	      mode  chooses  it	 if blits are accelerated. Without accelerated
	      blits this mode is not recommended.

	      frontonly There is no back buffer. This is the  best  choice  if
	      you  are	using opaque windows only and don't use any color key‐

	      Wait for the vertical retrace after flipping. The default is  to
	      wait before doing the flip.

	      Disables polling for vertical retrace.

       Here  are  some examples that demonstrates how the parameters described
       above are passed to DirectFB application on the command-line.

       df_neo --dfb:no-hardware
	      Starts df_neo without hardware acceleration.

       df_neo --dfb:help
	      Lists the DirectFB options that can be passed to df_neo.

       The  canonical  place  to  find	informations  about  DirectFB  is   at   Here you can find the FAQ, tutorials, mail‐
       ing list archives, the CVS tree and can download the latest version  of
       the DirectFB library as well as a number of applications.

	      system-wide DirectFB configuration file

	      per-user DirectFB configuration file

	      frame buffer modes file

       fb.modes(5), fbset(8), mouse(4), ppm(5)

Version 0.9.25			  22 Dec 2004			 DIRECTFBRC(5)

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