1 /* Copyright (c) 2004 Russ Cox, see README for licence details */
2 #include <stdio.h>
3 #include <signal.h>
4 #include <X11/X.h>
5 #include <X11/Xlib.h>
6 #include <X11/Xutil.h>
7 #include "dat.h"
8 #include "fns.h"
9 
10 unsigned long
11 colorpixel(Display *dpy, ScreenInfo *s, int depth, unsigned long rgb, unsigned long def)
12 {
13 	int r, g, b;
14 
15 	r = rgb>>16;
16 	g = (rgb>>8)&0xFF;
17 	b = rgb&0xFF;
18 
19 	switch(depth){
20 	case 1:
21 	case 2:
22 	case 4:
23 	case 8:
24 	default:
25 		/* not going to waste color map entries */
26 		return def;
27 	case 15:
28 		r >>= 3;
29 		g >>= 3;
30 		b >>= 3;
31 		return (r<<10) | (g<<5) | b;
32 	case 16:
33 		r >>= 3;
34 		g >>= 2;
35 		b >>= 3;
36 		return (r<<11) | (g<<5) | b;
37 	case 24:
38 	case 32:
39 		/* try to find byte order */
40 		if(s->vis->red_mask & 0xff)
41 			return (r) | (g<<8) | (b<<16); /* OK on Sun */
42 		return rgb;
43 	}
44 }