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#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <bio.h>
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static ulong
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getval(char **p)
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{
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	ulong v;
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	char *q;
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	v = strtoul(*p, &q, 0);
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	v |= v<<8;
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	v |= v<<16;
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	*p = q;
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	return v;
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}
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void
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readcolmap(Display *d, RGB *colmap)
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{
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	int i;
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	char *p, *q;
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	Biobuf *b;
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	char buf[128];
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	USED(screen);
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	sprint(buf, "/dev/draw/%d/colormap", d->dirno);
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	b = Bopen(buf, OREAD);
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	if(b == 0)
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		drawerror(d, "rdcolmap: can't open colormap device");
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	for(;;) {
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		p = Brdline(b, '\n');
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		if(p == 0)
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			break;
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		i = strtoul(p, &q, 0);
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		if(i < 0 || i > 255) {
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			fprint(2, "rdcolmap: bad index\n");
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			exits("bad");
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		}
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		p = q;
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		colmap[255-i].red = getval(&p);
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		colmap[255-i].green = getval(&p);
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		colmap[255-i].blue = getval(&p);
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	}
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	Bterm(b);
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}