kis_abstract_compression.cpp

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/*
 *  SPDX-FileCopyrightText: 2010 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#include "kis_abstract_compression.h"
 
KisAbstractCompression::KisAbstractCompression()
{
}
 
KisAbstractCompression::~KisAbstractCompression()
{
}
 
void KisAbstractCompression::adjustForDataSize(qint32 dataSize)
{
    Q_UNUSED(dataSize);
}
 
void KisAbstractCompression::linearizeColors(quint8 *input, quint8 *output,
                                             qint32 dataSize, qint32 pixelSize)
{
    quint8 *outputByte = output;
    quint8 *lastByte = input + dataSize -1;
 
    for(qint32 i = 0; i < pixelSize; i++) {
        quint8 *inputByte = input + i;
        while (inputByte <= lastByte) {
            *outputByte = *inputByte;
            outputByte++;
            inputByte+=pixelSize;
        }
    }
}
 
void KisAbstractCompression::delinearizeColors(quint8 *input, quint8 *output,
                                               qint32 dataSize, qint32 pixelSize)
{
    quint8 *outputByte = output;
    quint8 *lastByte = output + dataSize -1;
 
    qint32 strideSize = dataSize / pixelSize;
    quint8 *startByte = input;
 
    while (outputByte <= lastByte) {
        quint8 *inputByte = startByte;
 
        for(qint32 i = 0; i < pixelSize; i++) {
            *outputByte = *inputByte;
            outputByte++;
            inputByte += strideSize;
        }
 
        startByte++;
    }
}