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/*************************************************************************
* Copyright (c) 2011 AT&T Intellectual Property
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-v10.html
*
* Contributors: Details at https://graphviz.org
*************************************************************************/
#include "config.h"
#include <sparse/colorutil.h>
#include <sparse/general.h>
#include <stdio.h>
#include <util/agxbuf.h>
static int r2i(float r) {
/* convert a number in [0,1] to 0 to 255 */
return (int)(255 * r + 0.5);
}
void rgb2hex(float r, float g, float b, agxbuf *cstring, const char *opacity) {
agxbprint(cstring, "#%02x%02x%02x", r2i(r), r2i(g), r2i(b));
// set to semitransparent for multiple sets vis
if (opacity && strlen(opacity) >= 2) {
agxbput_n(cstring, opacity, 2);
}
}
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