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SPLASH(4)		 BSD Kernel Interfaces Manual		     SPLASH(4)

     splash -- splash screen / screen saver interface

     device splash

     The splash	pseudo device driver adds support for the splash screen	and
     screen savers to the kernel.  This	driver is required if the splash bit-
     map image is to be	loaded or any screen saver is to be used.

   Splash screen
     You can load and display an arbitrary bitmap image	file as	a welcome ban-
     ner on the	screen when the	system is about	to start.  This	image will re-
     main on the screen	during kernel initialization process until the login
     prompt appears on the screen or until a screen saver is loaded and	ini-
     tialized.	The image will also disappear if you hit any key, although
     this may not work immediately if the kernel is still probing devices.

     If	you specify the	-c or -v boot option when loading the kernel, the
     splash image will not appear.  However, it	is still loaded	and can	be
     used as a screen saver later: see below.

     In	order to display the bitmap, the bitmap	file itself and	the matching
     splash image decoder module must be loaded	by the boot loader.  Currently
     the following decoder modules are available:

     splash_bmp.ko   W*ndows BMP file decoder.	While the BMP file format al-
		     lows images of various color depths, this decoder cur-
		     rently only handles 256 color bitmaps.  Bitmaps of	other
		     color depths will not be displayed.
     splash_pcx.ko   ZSoft PCX decoder.	 This decoder currently	only supports
		     version 5 8-bpp single-plane images.
     splash_txt.ko   TheDraw binary ASCII drawing file decoder.	 Displays a
		     text-mode 80x25 ASCII drawing, such as that produced by
		     the Binary	save format in TheDraw.	 This format consists
		     of	a sequence of two byte pairs representing the 80x25
		     display, where the	first byte is the ASCII	character to
		     draw and the second byte indicates	the colors/attributes
		     to	use when drawing the character.

     The EXAMPLES section illustrates how to set up the	splash screen.

     If	the standard VGA video mode is used, the size of the bitmap must be
     320x200 or	less.  If you enable the VESA mode support in the kernel, ei-
     ther by statically	linking	the VESA module	or by loading the VESA module
     (see vga(4)), you can load	bitmaps	up to a	resolution of 1024x768,	de-
     pending on	the VESA BIOS and the amount of	video memory on	the video

   Screen saver
     The screen	saver will activate when the system is considered idle:	i.e.
     when the user has not typed a key or moved	the mouse for a	specified pe-
     riod of time.  As the screen saver	is an optional module, it must be ex-
     plicitly loaded into memory.  Currently the following screen saver	mod-
     ules are available:

     blank_saver.ko    This screen saver simply	blanks the screen.
     beastie_saver.ko  Animated	graphical BSD Daemon.
     daemon_saver.ko   Animated	BSD Daemon screen saver.
     dragon_saver.ko   Draws a random dragon curve.
     fade_saver.ko     The screen will gradually fade away.
     fire_saver.ko     A fire which becomes higher as load increases.
     green_saver.ko    The screen will be blanked, similar to blank_saver.ko.
		       If the monitor and the video card's BIOS	support	it the
		       screen will also	be powered off.
     logo_saver.ko     Animated	graphical FreeBSD logo.
     rain_saver.ko     Draws a shower on the screen.
     snake_saver.ko    Draws a snake of	string.
     star_saver.ko     Twinkling stars.
     warp_saver.ko     Streaking stars.

     Screen saver modules can be loaded	using kldload(8):

	   kldload logo_saver

     The timeout value in seconds can be specified as follows:

	   vidcontrol -t N

     Alternatively, you	can set	the saver variable in the /etc/rc.conf to the
     screen saver of your choice and the timeout value to the blanktime	vari-
     able so that the screen saver is automatically loaded and the timeout
     value is set when the system starts.

     The screen	saver may be instantly activated by hitting the	saver key: the
     defaults are Shift-Pause on the AT	enhanced keyboard and
     Shift-Ctrl-NumLock/Pause on the AT	84 keyboard.  You can change the saver
     key by modifying the keymap (see kbdcontrol(1), keymap(5)), and assign
     the saver function	to a key of your preference.

     The screen	saver will not run if the screen is not	in text	mode.

   Splash screen as a screen saver
     If	you load a splash image	but do not load	a screen saver,	you can	con-
     tinue using the splash module as a	screen saver.  The screen blanking in-
     terval can	be specified as	described in the Screen	saver section above.

     /boot/defaults/loader.conf	  boot loader configuration defaults
     /etc/rc.conf		  system configuration information
     /boot/kernel/splash_*.ko	  splash image decoder modules
     /boot/kernel/*_saver.ko	  screen saver modules
     /boot/kernel/vesa.ko	  the VESA support module

     In	order to load the splash screen	or the screen saver, you must have the
     following line in the kernel configuration	file.

	   device splash

     Next, edit	/boot/loader.conf (see loader.conf(5)) and include the follow-
     ing lines:


     In	the above example, the file /boot/chuck.bmp is loaded.	In the follow-
     ing example, the VESA module is loaded so that a bitmap file which	cannot
     be	displayed in standard VGA modes	may be shown using one of the VESA
     video modes.


     If	the VESA support is statically linked to the kernel, it	is not neces-
     sary to load the VESA module.  Just load the bitmap file and the splash
     decoder module as in the first example above.

     To	load a binary ASCII drawing and	display	this while booting, include
     the following into	your /boot/loader.conf:


     vidcontrol(1), syscons(4),	vga(4),	loader.conf(5),	rc.conf(5),
     kldload(8), kldunload(8)

     The splash	driver first appeared in FreeBSD 3.1.

     The splash	driver and this	manual page were written by Kazutaka Yokota
     <>.  The	splash_bmp module was written by Michael Smith
     <> and Kazutaka Yokota.	The splash_pcx module was
     written by	Dag-Erling Smorgrav <> based on the splash_bmp
     code.  The	splash_txt module was written by Antony	Mawer
     <>	based on the splash_bmp	code, with some	additional in-
     spiration from the	daemon_saver code.

     Both the splash screen and	the screen saver work with syscons(4) only.

     If	you load a screen saver	while another screen saver has already been
     loaded, the first screen saver will not be	automatically unloaded and
     will remain in memory, wasting kernel memory space.

BSD			       November	29, 2010			   BSD


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