45 lines
911 B
C
45 lines
911 B
C
/* Copyright (c) 2004 Russ Cox, see README for licence details */
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#include <stdio.h>
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#include <signal.h>
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#include <X11/X.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include "dat.h"
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#include "fns.h"
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unsigned long
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colorpixel(
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Display* dpy, ScreenInfo* s, int depth, unsigned long rgb,
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unsigned long def) {
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int r, g, b;
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r = rgb >> 16;
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g = (rgb >> 8) & 0xFF;
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b = rgb & 0xFF;
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switch (depth) {
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case 1:
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case 2:
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case 4:
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case 8:
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default:
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/* not going to waste color map entries */
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return def;
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case 15:
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r >>= 3;
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g >>= 3;
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b >>= 3;
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return (r << 10) | (g << 5) | b;
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case 16:
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r >>= 3;
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g >>= 2;
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b >>= 3;
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return (r << 11) | (g << 5) | b;
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case 24:
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case 32:
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/* try to find byte order */
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if (s->vis->red_mask & 0xff)
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return (r) | (g << 8) | (b << 16); /* OK on Sun */
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return rgb;
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}
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}
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