Provided by: svgalib-bin_1.4.3-31_i386 bug

NAME

       restorefont - save or restore the SVGA font for textmode.

SYNOPSIS

       restorefont {-r|-w} filename

DESCRIPTION

       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.

FILE FORMAT

       The VGA font file filename has the following format:

              Offset:
                 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
       character.

       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
       restorefont requires.

       The purpose of this program  is  usually  to  recover  from  a  crashed
       console  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
       procedure very easy.

       The national/fontpak packages,  which  include  kernel  patches,  allow
       different  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       These have been superseded by the kbd  package  (in  the  kernel  since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
       versions  of  svgalib take this into account and extend the size of the
       datafile accordingly.

OPTIONS

       -w filename
              write the font to the file filename.

       -r filename
              restore the font from the file filename.

SEE ALSO

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

AUTHOR

       This  manual  page  was  edited by Michael Weller <eowmob@exp-math.uni-
       essen.de>. 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 <H.Hanemaayer@inter.nl.net>.

       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.