/*
 * Copyright 1996 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/*
 * This file contains macro definitions for the Scaling category of
 * the macros used by the generic scaleloop function.
 *
 * This implementation performs no input resampling whatsoever and
 * is only valid if the input data is delivered at the exact same
 * resolution as the output data is being generated.  At the same
 * time, this implementation of the Scaling macros is the most optimal
 * such implementation.
 */

#define DeclareScaleVars                                        \
    int dstX, dstY, dstX2, dstY2;

#define SRCX    dstX
#define SRCY    dstY
#define DSTX    dstX
#define DSTY    dstY
#define DSTX1   srcOX
#define DSTY1   srcOY
#define DSTX2   dstX2
#define DSTY2   dstY2

#define InitScale(pixels, srcOff, srcScan,                              \
                  srcOX, srcOY, srcW, srcH,                             \
                  srcTW, srcTH, dstTW, dstTH)                           \
    do {                                                                \
        dstX2 = srcOX + srcW;                                           \
        dstY2 = srcOY + srcH;                                           \
        SetInputRow(pixels, srcOff, srcScan, srcOY, srcOY);             \
    } while (0)

#define RowLoop(srcOY)                                                  \
    for (dstY = srcOY; dstY < dstY2; dstY++)

#define RowSetup(srcTH, dstTH, srcTW, dstTW,                            \
                 srcOY, pixels, srcOff, srcScan)                        \
        do {} while (0)

#define ColLoop(srcOX)                                                  \
        for (dstX = srcOX; dstX < dstX2; dstX++)

#define ColSetup(srcTW, dstTW, pixel)                                   \
            pixel = GetPixelInc()

#define RowEnd(srcTH, dstTH, srcW, srcScan)                             \
        InputPixelInc(srcScan - srcW)