plan9 man page for card

Query: card

OS: plan9

Section: 9

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

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)
Related Man Pages
pcp(9) - plan9
picfile(9) - plan9
imagecolorresolvealpha(3) - php
imager::color(3pm) - debian
imager::color::float(3pm) - debian
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