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
IR 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 SOURCE
B /sys/src/fb/card.c
br
B /sys/src/fb/ramp.c
SH "SEE ALSO
IR picfile (9.6)

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