151 lines
3.1 KiB
HTML
151 lines
3.1 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of ppmrainbow</TITLE>
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</HEAD><BODY>
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<H1>ppmrainbow</H1>
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Section: User Commands (1)<BR>Updated: 1 July 2001<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="ixAAB"></A>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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ppmrainbow - Generate a rainbow
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<P>
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>ppmrainbow</B>
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[<B>-width=</B><I>number</I>]
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[<B>-height=</B><I>number</I>]
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<BR>
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[<B>-tmpdir=</B><I>directory</I>]
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[<B>-verbose</B>]
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<I>color</I> ...
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<P>
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<P>
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All options can be abbreviated to their shortest unique prefix. You
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may use two hyphens instead of one to designate an option. You may
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use either white space or equals signs between an option name and its
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value.
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<P>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<B>ppmrainbow</B>
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generates a PPM image that fades from one color to another to another
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from left to right, like a rainbow. The colors are those you specify
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on the command line, in that order. The first color is added again on
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the right end of the image.
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<P>
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If you want a vertical or other non-horizontal rainbow, run the output
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through
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<B>pnmrotate</B>.
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<P>
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One use for such a rainbow is to compose it with another image under
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an alpha mask in order to add a rainbow area to another image. In fact,
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you can make rainbow-colored text by using
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<B>pbmtext</B>,
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<B>pnmcomp</B>,
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and
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<B>ppmrainbow</B>.
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<P>
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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<DL COMPACT>
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<DT id="1"><B>-width </B><I>number</I>
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<DD>
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The width in pixels of the output image.
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<P>
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Default is 600.
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<DT id="2"><B>-height </B><I>number</I>
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<DD>
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The height in pixels of the output image.
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<P>
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Default is 8.
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<DT id="3"><B>-tmpdir</B>
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<DD>
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The directory specification of the directory
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<B>ppmrainbow</B>
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is to use for temporary files.
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<P>
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Default is the value of the
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<B>TMPDIR </B>
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environment variable, or
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<I>/tmp</I>
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if
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<B>TMPDIR </B>
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is not set.
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<DT id="4"><B>-verbose</B>
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<DD>
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Print the "commands" (invocations of other Netpbm programs) that
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<B>ppmrainbow</B>
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uses to create the image.
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<P>
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</DL>
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<A NAME="lbAF"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?1+ppmmake">ppmmake</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?1+pnmcomp">pnmcomp</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?1+pbmtext">pbmtext</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?1+ppmfade">ppmfade</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?5+ppm">ppm</A></B>(5).
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<P>
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<A NAME="lbAG"> </A>
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<H2>AUTHOR</H2>
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<P>
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Arjen Bax wrote
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<B>ppmrainbow</B>
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in June 2001 and contributed it to the Netpbm package. Bryan
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Henderson wrote this man page in July 2001.
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="5"><A HREF="#lbAB">NAME</A><DD>
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<DT id="6"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="7"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="8"><A HREF="#lbAE">OPTIONS</A><DD>
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<DT id="9"><A HREF="#lbAF">SEE ALSO</A><DD>
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<DT id="10"><A HREF="#lbAG">AUTHOR</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:25 GMT, March 31, 2021
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</BODY>
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</HTML>
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