qt-everywhere-src-5.14.1/qtmultimedia/src/multimedia/video/qimagevideobuffer.cpp

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#include "qimagevideobuffer_p.h"

#include "qabstractvideobuffer_p.h"

#include <qimage.h>
#include <qvariant.h>

QT_BEGIN_NAMESPACE

/*!
 * \class QImageVideoBuffer
 * \internal
 *
 * A video buffer class for a QImage.
 */
class QImageVideoBufferPrivate : public QAbstractVideoBufferPrivate
{
public:
    QImageVideoBufferPrivate()
        : mapMode(QAbstractVideoBuffer::NotMapped)
    {
    }

    QAbstractVideoBuffer::MapMode mapMode;
    QImage image;
};

QImageVideoBuffer::QImageVideoBuffer(const QImage &image)
    : QAbstractVideoBuffer(*new QImageVideoBufferPrivate, NoHandle)
{
    Q_D(QImageVideoBuffer);

    d->image = image;
}

QImageVideoBuffer::~QImageVideoBuffer()
{
}

QAbstractVideoBuffer::MapMode QImageVideoBuffer::mapMode() const
{
    return d_func()->mapMode;
}

uchar *QImageVideoBuffer::map(MapMode mode, int *numBytes, int *bytesPerLine)
{
    Q_D(QImageVideoBuffer);

    if (d->mapMode == NotMapped && d->image.bits() && mode != NotMapped) {
        d->mapMode = mode;

        if (numBytes)
            *numBytes = int(d->image.sizeInBytes());

        if (bytesPerLine)
            *bytesPerLine = d->image.bytesPerLine();

        return d->image.bits();
    } else {
        return nullptr;
    }
}

void QImageVideoBuffer::unmap()
{
    Q_D(QImageVideoBuffer);

    d->mapMode = NotMapped;
}

QT_END_NAMESPACE