Java example source code file (img_fsutil.h)

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ditherdist, img_fsutil_h

The img_fsutil.h Java example source code

/*
 * Copyright (c) 1996, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * This file contains utility macros used by the Floyd-Steinberg
 * algorithms used in some of the other include files.
 */

#ifndef IMG_FSUTIL_H
#define IMG_FSUTIL_H

#define DitherDist(ep, e1, e2, e3, ec, c)               \
    do {                                                \
        e3 = (ec << 1);                                 \
        e1 = e3 + ec;                                   \
        e2 = e3 + e1;                                   \
        e3 += e2;                                       \
                                                        \
        ep[0].c += e1 >>= 4;                            \
        ep[1].c += e2 >>= 4;                            \
        ep[2].c += e3 >>= 4;                            \
        ec -= e1 + e2 + e3;                             \
    } while (0)

#endif /* IMG_FSUTIL_H */