GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  FBCBARS (1)

.ds Aq ’

NAME

fbcbars - display standard color bars on a framebuffer

CONTENTS

SYNOPSIS

fbcbars [-e] [-f] [-s] [-F framebuffer] [-S squarescrsize] [-W scr_width] [-N scr_height]

DESCRIPTION

fbcbars displays a color bar scale on the currently selected framebuffer. The default pattern is the standard SMPTE color bars.

With the -f flag, FCC/EBU color bars are made. The entire screen will contain 8 colors: 100% white, 75% yellow, 75% cyan, 75% green, 75% magenta, 75% red, 75% blue, and black.

By specifying the -e flag, the standard EIA color bars are displayed, arranged horizontally on screen. The bottom quarter of the screen will be -I, 100% white, Q, black. The upper portion of the screen will be seven colors at 75% intensity: grey, yellow, cyan, green, magenta, red, blue.

By specifying the -s flag, SMPTE color bars are displayed. This is the EIA pattern with the upper quarter of the bottom quarter of the screen containing a reversed and shifted version of the upper pattern, which is very useful for aligning color demodulators in monitors. Using a dichroic blue filter, observe the magenta and cyan bars on the NTSC monitor. Adjust the phase of the chroma demodulator until they have visually equal intensity. At this point, all the other color bars will display the correct chroma.

The environment variable FB_FILE specifies the current framebuffer, see brlcad(1). Alternatively, the framebuffer may be explicitly specified by using the -F flag.

Ordinarily, the requested framebuffer size is the device default.

The -W scr_width flag specifies the width of each output scanline, in pixels.

The -N scr_height flag specifies the desired height in scanlines of the display device.

-S squarescrsize set both the height and width to the size given.

INSPIRATIONS

Mike Pique, University of North Carolina Doris Kochanek, National Film Board of Canada

AUTHOR

Michael John Muuss

COPYRIGHT

This software is Copyright (c) 1988-2013 by the United States Government as represented by U.S. Army Research Laboratory.

BUG REPORTS

Reports of bugs or problems should be submitted via electronic mail to <devs@brlcad.org>.

Search for    or go to Top of page |  Section 1 |  Main Index


BRL-CAD FBCBARS (1) 04/04/2016

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.