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/* The initluts routine initializes the LUTs for the line graphics window */
/* Sam Southard, Jr. */
/* Created: 13-Mar-1991 (from figdisp/initluts) */
/* Modification History: */
/* 15-Aug-1991 SNS/CIT No longer contains hooks for xvideo */
/* 8-Oct-1991 SNS/CIT Globals now in globals.h */
/* 14-Feb-1992 SNS/CIT Now deals with grey scale and read only visuals */
/* The X Window include files */
#include <X11/Xlib.h>
/* The program include files */
#include "figdisp.h"
#include "globals.h"
static unsigned short pgcolors[LG_COLORS][3]= {
0, 0, 0,
65535, 65535, 65535,
65535, 0, 0,
0, 65535, 0,
0, 0, 65535,
0, 65535, 65535,
65535, 0, 65535,
65535, 65535, 0,
65535, 32768, 0,
32768, 65535, 0,
0, 65535, 32768,
0, 32768, 65535,
32768, 0, 65535,
65535, 0, 32768,
21845, 21845, 21845,
43690, 43690, 43690 };
void initlgluts()
{
XColor color; /* The color table entry */
int i; /* silly loop variables */
/* If we're dealing with 2 colors, return right away, since it's */
/* already done. */
if (lg.colors == 2) return;
color.flags=DoRed | DoGreen | DoBlue;
/* PGPLOT defines the first 16 colors */
for (i=0 ; i < lg.colors && i < 16 ; ++i)
{
if (lg.bw) color.red=color.green=color.blue=
0.30*pgcolors[i][0]+0.59*pgcolors[i][1]+
0.11*pgcolors[i][2];
else {
color.red=pgcolors[i][0];
color.green=pgcolors[i][1];
color.blue=pgcolors[i][2];
}
color.pixel=lg.pix[i];
if (lg.ro) {
XAllocColor(display, linecmap, &color);
lg.pix[i]=color.pixel;
}
else XStoreColor(display, linecmap, &color);
}
/* PGPLOT doesn't define these, but I will. It's a linear greyscale */
/* with black at 15 (although 15 is used by another color, since we */
/* already have a BlackPixel) and white at lg.colors-1. */
for ( ; i < lg.colors ; ++i)
{
color.red=color.green=color.blue=
((double)(i-15)/(lg.colors-16))*65535;
color.pixel=lg.pix[i];
if (lg.ro) XAllocColor(display, linecmap, &color);
else XStoreColor(display, linecmap, &color);
}
return;
}
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