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.TH PPMTOANSI 1 "January 12, 1997"
.SH NAME
ppmtoansi \- Graphics Conversion Program For Extended ANSI Escape Codes
.SH SYNOPSIS
.B ppmtoansi
[
.SM \-b
r/g/b ] [
.SM \-t
r/g/b:idx] [
.SM \-x
<xoffset> ] [
.SM \-y
<yoffset> ] [
<filename> ]
.SH DESCRIPTION
.I ppmtoansi
converts input files in
.IR ppm (5)
format to escape sequences that are understood by
.IR etherboot .
This allows for displaying icons and logos on the BOOT-Prom's splash
screen.
.PP
If no input file is specified, data is read from
.IR standard
.IR input .
All output is send to
.IR standard
.IR output ,
error messages go to
.IR standard
.IR error .
.I ppmtoansi
tries to do some compression and minimizes the output filesize.
.SH OPTIONS
.TP
.B \-b
Specifies the
.IR red ,
.IR green , and
.IR blue
intensities for the background color. This information is
used for providing a shape mask. All values are in the range from 0 to
255.
.TP
.B \-t
Allows for explicitly providing a translation between color values and
color indices. The indices are in the range 0 to 7 and conform to the
standard
.IR ANSI
.IR colorcodes .
.RS
.PP
0 black 4 blue
.PP
1 red 5 magenta
.PP
2 green 6 cyan
.PP
3 yellow 7 white
.PP
If no translations apply,
.IR ppmtoansi
will automatically select the color that is closest.
.RE
.TP
.B \-x
Specify an X offset relative to the current text cursor position.
.TP
.B \-y
Specify an Y offset relative to the current text cursor position.
.SH FILE FORMAT
.IR ppmtoansi
uses these extensions to the standard
.B ANSI escape
.BR codes .
.TP
.B <esc>[a;b;c;d+<data>
Draw pixel data. Use one byte per pixel. Colors are encoded as shown
above. In text mode, graphics is approximated by outputting suitable
characters. Parameters differ depending on the number of parameters
passed:
.RS
.TP
.B cnt
.IR cnt
data bytes follow. They will be drawn to the right of the last
graphics position.
.TP
.B rle;col
The next
.IR rle
pixels have the value
.IR col .
They will be drawn to the right of the last graphics position. No data
bytes follow.
.TP
.B x;y;cnt
.IR cnt
data bytes follow. They will be drawn relative to the top left corner
of the text cursor with an offset of
.RI ( x / y ).
.TP
.B x;y;rle;col
the next
.IR rle
pixels have the value
.IR col .
They will be drawn relative to the top left corner of the text cursor
with an offset of
.RI ( x / y ).
No data bytes follow.
.RE
.TP
.B <esc>[a;b;c;d\-<data>
same as above, but pack pixels into three bits. The first pixel is
stored in the three most significant bits of the first data byte.
.SH "SEE ALSO"
ppm(5), mknbi-linux(8), mknbi-dos(8).
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