KisFastDeviceProcessingUtils.h

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/*
 *  SPDX-FileCopyrightText: 2018 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef KISFASTDEVICEPROCESSINGUTILS_H
#define KISFASTDEVICEPROCESSINGUTILS_H
 
#include "kis_random_accessor_ng.h"
#include <KoAlwaysInline.h>
 
namespace KritaUtils {
 
 
template <class PixelProcessor>
void processTwoDevices(const QRect &rc,
                       KisRandomConstAccessorSP srcIt,
                       KisRandomAccessorSP dstIt,
                       const int srcPixelSize,
                       const int dstPixelSize,
                       PixelProcessor pixelProcessor)
{
    qint32 dstY = rc.y();
    qint32 rowsRemaining = rc.height();
 
    while (rowsRemaining > 0) {
        qint32 dstX = rc.x();
 
        qint32 numContiguousSrcRows = srcIt->numContiguousRows(dstY);
        qint32 numContiguousDstRows = dstIt->numContiguousRows(dstY);
        qint32 rows = std::min({rowsRemaining, numContiguousSrcRows, numContiguousDstRows});
 
        qint32 columnsRemaining = rc.width();
 
        while (columnsRemaining > 0) {
 
            qint32 numContiguousSrcColumns = srcIt->numContiguousColumns(dstX);
            qint32 numContiguousDstColumns = dstIt->numContiguousColumns(dstX);
            qint32 columns = std::min({columnsRemaining, numContiguousSrcColumns, numContiguousDstColumns});
 
            qint32 dstRowStride = dstIt->rowStride(dstX, dstY);
            qint32 srcRowStride = srcIt->rowStride(dstX, dstY);
 
            dstIt->moveTo(dstX, dstY);
            srcIt->moveTo(dstX, dstY);
 
            quint8 *dstRowStart = dstIt->rawData();
            const quint8 *srcRowStart = srcIt->rawDataConst();
 
            for (int i = 0; i < rows; i++) {
                const quint8 *srcPtr = reinterpret_cast<const quint8*>(srcRowStart);
                quint8 *dstPtr = reinterpret_cast<quint8*>(dstRowStart);
 
                for (int j = 0; j < columns; j++) {
                    pixelProcessor(srcPtr, dstPtr);
 
                    srcPtr += srcPixelSize;
                    dstPtr += dstPixelSize;
                }
 
                srcRowStart += srcRowStride;
                dstRowStart += dstRowStride;
            }
 
            dstX += columns;
            columnsRemaining -= columns;
        }
 
        dstY += rows;
        rowsRemaining -= rows;
    }
}
 
template <class PixelProcessor>
void processTwoDevicesWithStrides(const QRect &rc,
                                  KisRandomConstAccessorSP srcIt,
                                  KisRandomAccessorSP dstIt,
                                  PixelProcessor pixelProcessor)
{
    qint32 dstY = rc.y();
    qint32 rowsRemaining = rc.height();
 
    while (rowsRemaining > 0) {
        qint32 dstX = rc.x();
 
        qint32 numContiguousSrcRows = srcIt->numContiguousRows(dstY);
        qint32 numContiguousDstRows = dstIt->numContiguousRows(dstY);
        qint32 rows = std::min({rowsRemaining, numContiguousSrcRows, numContiguousDstRows});
 
        qint32 columnsRemaining = rc.width();
 
        while (columnsRemaining > 0) {
 
            qint32 numContiguousSrcColumns = srcIt->numContiguousColumns(dstX);
            qint32 numContiguousDstColumns = dstIt->numContiguousColumns(dstX);
            qint32 columns = std::min({columnsRemaining, numContiguousSrcColumns, numContiguousDstColumns});
 
            qint32 dstRowStride = dstIt->rowStride(dstX, dstY);
            qint32 srcRowStride = srcIt->rowStride(dstX, dstY);
 
            dstIt->moveTo(dstX, dstY);
            srcIt->moveTo(dstX, dstY);
 
            quint8 *dstRowStart = dstIt->rawData();
            const quint8 *srcRowStart = srcIt->rawDataConst();
 
            pixelProcessor(srcRowStart, srcRowStride,
                           dstRowStart, dstRowStride,
                           rows, columns);
 
            dstX += columns;
            columnsRemaining -= columns;
        }
 
        dstY += rows;
        rowsRemaining -= rows;
    }
}
 
}
 
 
#endif // KISFASTDEVICEPROCESSINGUTILS_H