plan9 man page for card

CARD(9.1)																 CARD(9.1)

NAME
       card, ramp - create simple color fields

SYNOPSIS
       fb/card [ -crgba ] [ -wx0 y0 x1 y1 ] red [ green blue ] [ alpha ]

       fb/ramp [ -v ] [ -wx0 y0 x1 y1 ] [ [ leftcolor ] rightcolor ]

DESCRIPTION
       Card  writes  a	constant (all pixels equal) picture on standard output.  The red, green blue and alpha arguments are numbers between 0 and
       255.  Green and blue default equal to red.  Alpha defaults to 255.  Option -c specifies the CHAN=  attribute  of  the  picture  file.   The
       default is CHAN=m, CHAN=ma, CHAN=rgb, or CHAN=rgba depending on which of red, green blue and alpha are specified.

       Ramp creates a picture file whose pixel values range from leftcolor to rightcolor across each scan line, writing on standard output.  Left-
       color defaults to 0; rightcolor defaults to 255.  If three arguments are given for leftcolor and rightcolor the output will have  CHAN=rgb.
       Otherwise, it will have CHAN=m.

       Option -v causes ramp to make a vertical ramp (leftcolor at the top, rightcolor at the bottom).

       For both commands, option -w specifies the size of the picture.	The default gives WINDOW=0 0 1280 1024.

SOURCE
       /sys/src/fb/card.c
       /sys/src/fb/ramp.c

SEE ALSO
       picfile(9.6)

																	 CARD(9.1)