/*
 * Copyright (c) 2002 Light Weight Java Game Library Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'Light Weight Java Game Library' nor the names of
 *   its contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * $Id$
 *
 * math library.
 *
 * @author cix_foo <cix_foo@users.sourceforge.net>
 * @version $Revision$
 */

#ifdef _WIN32
#include <windows.h>
#endif

#include "org_lwjgl_Math_MatrixOpNegate_MatrixOpSafe.h"
#include "MatrixOpCommon.h"
/*
 * Class:     org_lwjgl_Math_MatrixOpNegate_MatrixOpSafe
 * Method:    execute
 * Signature: (IIIIIZIIZ)V
 */
JNIEXPORT void JNICALL Java_org_lwjgl_Math_00024MatrixOpNegate_00024MatrixOpSafe_execute
  (
	JNIEnv * env,
	jobject obj,
	jint sourceAddress,
	jint sourceStride,
	jint numElements,
	jint sourceWidth,
	jint sourceHeight,
	jboolean transposeSource,
	jint destAddress,
	jint destStride,
	jboolean transposeDest
  )
{
        MatrixSrc source  (sourceAddress,  sourceStride, sourceWidth,  sourceHeight,  numElements, transposeSource);
        MatrixDst dest  (destAddress,      destStride,   source.width, source.height, numElements, transposeDest);
    
        int * srcMatrix, * destMatrix;
 
        for (int i = 0; i < source.elements; i++)
        {
            srcMatrix = (int *) source.nextMatrix();
            destMatrix =   (int *) dest.nextMatrix();
            
            // we can cheat and use the less expensive xor 
            // to switch the sign bit of the float
            // single precision format   1 - sign   8 - exponent (excess 127) 23 - mantisa
            
            int j = source.width*source.height;
            while (j--)
                destMatrix[j] = srcMatrix[j] ^ 0x80000000;
    
            dest.writeComplete();
        }
}