From e5888a1ffdae813d7575f5fb02275c6bb07e5199 Mon Sep 17 00:00:00 2001
From: Taru Karttunen <taruti@taruti.net>
Date: Wed, 30 Mar 2011 15:46:40 +0300
Subject: Import sources from 2011-03-30 iso image

---
 sys/src/libdraw/readcolmap.c | 49 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100755 sys/src/libdraw/readcolmap.c

(limited to 'sys/src/libdraw/readcolmap.c')

diff --git a/sys/src/libdraw/readcolmap.c b/sys/src/libdraw/readcolmap.c
new file mode 100755
index 000000000..6eb8ee26e
--- /dev/null
+++ b/sys/src/libdraw/readcolmap.c
@@ -0,0 +1,49 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <bio.h>
+
+static ulong
+getval(char **p)
+{
+	ulong v;
+	char *q;
+
+	v = strtoul(*p, &q, 0);
+	v |= v<<8;
+	v |= v<<16;
+	*p = q;
+	return v;
+}
+
+void
+readcolmap(Display *d, RGB *colmap)
+{
+	int i;
+	char *p, *q;
+	Biobuf *b;
+	char buf[128];
+
+	USED(screen);
+
+	sprint(buf, "/dev/draw/%d/colormap", d->dirno);
+	b = Bopen(buf, OREAD);
+	if(b == 0)
+		drawerror(d, "rdcolmap: can't open colormap device");
+
+	for(;;) {
+		p = Brdline(b, '\n');
+		if(p == 0)
+			break;
+		i = strtoul(p, &q, 0);
+		if(i < 0 || i > 255) {
+			fprint(2, "rdcolmap: bad index\n");
+			exits("bad");
+		}
+		p = q;
+		colmap[255-i].red = getval(&p);
+		colmap[255-i].green = getval(&p);
+		colmap[255-i].blue = getval(&p);
+	}
+	Bterm(b);
+}
-- 
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