restorefont man page on aLinux

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restorefont(1)		      Svgalib User Manual		restorefont(1)

       restorefont - save or restore the SVGA font for textmode.

       restorefont {-r|-w} filename

       The  font  used by SVGA when in textmode is written to or restored from
       filename using the vga_gettextfont(3) and vga_puttextfont(3) functions.

       The VGA font file filename has the following format:

		 0 -   31  Character 0
		  ...	       ...
	      8164 - 8195  Character 255

       Each row of a character bitmap is stored as a  byte  (8	pixels).   The
       space  that  is	left  from  the	 32-byte  buffer for each character is
       ignored, e.g. a 16 line font uses only offsets 0 - 15 of	 each  charac‐

       Linux textmode screen resolutions:

       80x25	16 line font  400 scanlines
       80x28	14 line font  400 scanlines
       80x50	 8 line font  400 scanlines

       The  font  sizes	 and  resolutions  of extended textmodes depend on the
       video card type and BIOS:

       132x25	14 line font  350 scanlines (ugly)
       132x25	16 line font  400 scanlines
       132x43	 8 line font  350 scanlines (use fix132x43 to fix/improve)
       132x50	 8 line font  400 scanlines

       Using a font that has less lines per character than the textmode works,
       but  the	 characters  are smaller. Using a font that is bigger than the
       textmode font results in the bottom part of characters being cut off.

       The svgalib distribution contains sample fonts with 8, 14 and  16  line
       characters in the files utils/font8, utils/font14, and utils/font16.

       The convfont (1) program can be used to convert fonts straightforwardly
       stored  character-after-character  (i.e.	 each  character   only	  uses
       8/14/whatever bytes), to the 32-byte per character format that restore‐
       font requires.

       The purpose of this program is usually to recover from a	 crashed  con‐
       sole  due  to  an  svgalib,  Xfree or other program bug. First save the
       state of the SVGA card when on a text console. After the crash  restore
       this  state. The savetextmode(1) and textmode(1) script makes this pro‐
       cedure very easy.

       The national/fontpak packages, which include kernel patches, allow dif‐
       ferent  textmode	 fonts to be used in different virtual consoles. These
       have been superseded by the kbd package (in the kernel since ages). See
       the setfont(8) utility of the kbd package as a starting point.

       Recent  kernels	support up to 2 fonts with 512 chars each. Recent ver‐
       sions of svgalib take this into account and  extend  the	 size  of  the
       datafile accordingly.

       -w filename
	      write the font to the file filename.

       -r filename
	      restore the font from the file filename.

       svgalib(7), vgagl(7), libvga.config(5), setfont(8), vga_gettextfont(3),
       vga_puttextfont(3),  dumpreg(1),	 convfont(1),  fix132x43(1),  restore‐
       textmode(1),  restorepalette(1),	 runx(1), savetextmode(1), setmclk(1),

       This manual page was edited  by	Michael	 Weller	 <eowmob@exp-math.uni->. The exact source of the referenced utility as well as of the
       original documentation is unknown.

       It is very likely that both are at least to some extent are due to Harm
       Hanemaayer <>.

       Occasionally  this  might be wrong. I hereby asked to be excused by the
       original author and will happily accept any additions or corrections to
       this first version of the svgalib manual.

Svgalib (>= 1.2.11)		  2 Aug 1997			restorefont(1)

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