unixdev.net


Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (plan9)
Page:
Section:
Apropos / Subsearch:
optional field

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)