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