plplot-doc 5.9.9-5 / usr / share / doc / plplot-doc / html / plgcol0a.html

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>&#13;      plgcol0a: Returns 8-bit RGB values and double alpha
      value for given color from color map0.
    </TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="The PLplot Plotting Library"
HREF="index.html"><LINK
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TITLE="The Common API for PLplot"
HREF="api.html"><LINK
REL="PREVIOUS"
TITLE="
      plgcol0: Returns 8-bit RGB values for given color
      from color map0
    "
HREF="plgcol0.html"><LINK
REL="NEXT"
TITLE="
      plgcolbg:  Returns the background color
      (cmap0[0]) by 8-bit RGB value
    "
HREF="plgcolbg.html"><LINK
REL="STYLESHEET"
TYPE="text/css"
HREF="stylesheet.css"></HEAD
><BODY
CLASS="sect1"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
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><TR
><TH
COLSPAN="3"
ALIGN="center"
>The PLplot Plotting Library: Programmer's Reference Manual</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="plgcol0.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Chapter 19. The Common API for PLplot</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="plgcolbg.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="sect1"
><H3
CLASS="sect1"
><A
NAME="plgcol0a"
><CODE
CLASS="function"
>plgcol0a</CODE
>: Returns 8-bit RGB values and double alpha
      value for given color from color map0.</A
></H3
><P
>&#13;      <DIV
CLASS="funcsynopsis"
><P
></P
><A
NAME="AEN5866"
></A
><TABLE
CLASS="funcprototype"
><TR
><TD
><CODE
CLASS="FUNCDEF"
>&#13;	    plgcol0a
	  </CODE
>(icol0, r, g, b, a);</TD
></TR
></TABLE
><P
></P
></DIV
>
    </P
><P
>&#13;      Returns 8-bit RGB values (0-255) and double alpha value (0.0 - 1.0) for 
      given color from color map0 (see <A
HREF="color.html#color-map-0"
>the Section called <I
>Color Map0</I
> in Chapter 3</A
>).  Values 
      are negative if an invalid color id is given.
    </P
><TABLE
CLASS="variablelist"
><TR
><TD
><DL
><DT
><CODE
CLASS="parameter"
>icol0</CODE
>
	  (<TT
CLASS="literal"
>PLINT</TT
>, input)</DT
><DD
><P
>&#13;	    Index of desired cmap0 color.
	  </P
></DD
><DT
><CODE
CLASS="parameter"
>r</CODE
>
	  (<TT
CLASS="literal"
>PLINT *</TT
>, output)</DT
><DD
><P
>&#13;	    Pointer to 8-bit red value.
	  </P
></DD
><DT
><CODE
CLASS="parameter"
>g</CODE
>
	  (<TT
CLASS="literal"
>PLINT *</TT
>, output)</DT
><DD
><P
>&#13;	    Pointer to 8-bit green value.
	  </P
></DD
><DT
><CODE
CLASS="parameter"
>b</CODE
>
	  (<TT
CLASS="literal"
>PLINT *</TT
>, output)</DT
><DD
><P
>&#13;	    Pointer to 8-bit blue value.
	  </P
></DD
><DT
><CODE
CLASS="parameter"
>a</CODE
>
	  (<TT
CLASS="literal"
>PLFLT *</TT
>, output)</DT
><DD
><P
>&#13;	    Pointer to PLFLT alpha value.
	  </P
></DD
></DL
></TD
></TR
></TABLE
><P
>&#13;      This function is used in example 30.
    </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
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><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="plgcol0.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="plgcolbg.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><CODE
CLASS="function"
>plgcol0</CODE
>: Returns 8-bit RGB values for given color
      from color map0</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="api.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><CODE
CLASS="function"
>plgcolbg</CODE
>:  Returns the background color
      (cmap0[0]) by 8-bit RGB value</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>

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