.TH CARD 9.1
.SH NAME
card, ramp \- create simple color fields
.SH SYNOPSIS
.B fb/card
[
.BI -c rgba
] [
.BI -w "x0 y0 x1 y1
]
.I red
[
.I green blue
] [
.I alpha
]
.PP
.B fb/ramp
[
.BI -v
] [
.BI -w "x0 y0 x1 y1
]
[ [
.I leftcolor
]
.I rightcolor
]
.SH DESCRIPTION
.I Card
writes a constant (all pixels equal) picture on standard output.
The
.I red, green blue
and
.I alpha
arguments are numbers between 0 and 255.
.I Green
and
.I blue
default equal to
.I red.
.I Alpha
defaults to 255.
Option
.B -c
specifies the
.B CHAN=
attribute of the picture file.
The default is
.BR CHAN=m ,
.BR CHAN=ma ,
.BR CHAN=rgb ,
or
.B CHAN=rgba
depending on which of
.I red, green blue
and
.I alpha
are specified.
.PP
.I Ramp
creates a picture file whose pixel values range
from
.I leftcolor
to
.I rightcolor
across each scan line, writing on standard output.
.I Leftcolor
defaults to 0;
.I rightcolor
defaults to 255.  If three arguments are given
for
.I leftcolor
and
.I rightcolor
the output will have
.BR CHAN=rgb .
Otherwise, it will have
.BR CHAN=m .
.PP
Option
.B -v
causes
.I ramp
to make a vertical ramp
.RI ( leftcolor
at the top,
.I rightcolor
at the bottom).
.PP
For both commands, 
option
.B -w
specifies the size of the picture.
The default gives
.BR "WINDOW=0 0 1280 1024" .
.SH "SEE ALSO
.IR picfile (9.6)