C++ QuillImage::isFragment方法代码示例

QRect LoadFilter::rotateArea(const QSize &fullImageSize, const QRect &area, const QuillImage &tile) const
{
    switch (priv->orientation) {
    case Exif_Orientation_Normal:
        return area;
    case Exif_Orientation_Rotated180:
        return QRect(fullImageSize.width()-area.right() - 1,
                     fullImageSize.height()-area.bottom() - 1,
                     area.width(), area.height());
    case Exif_Orientation_Rotated270:
        if(tile.isFragment())
            return QRect(fullImageSize.height()-area.bottom()-1,
                               area.left(),
                               area.height(), area.width());

        else
            return QRect(area.top(),
                         fullImageSize.width()-area.right() - 1,
                         area.height(), area.width());
    case Exif_Orientation_Rotated90:
        //The used base image is 3840x2160(WxH), we need to map from 2160x3840(WxH) when we use tiles
        if(tile.isFragment())
            return QRect(area.top(),
                         fullImageSize.width()-area.right() - 1,
                         area.height(), area.width());

        //for full screen display from the full image
        else
            return QRect(fullImageSize.height()-area.bottom() - 1,
                           area.left(),
                           area.height(), area.width());
    default:
        return area;
    }
}

QPoint EnlargeShrink::getCenter(const QuillImage &img) const
{
    QPoint center = m_Center;
    if (!img.isFragment() || (img.width() == 170 && img.height() == 170)) {
        center.setX(center.x() * img.width()  / img.fullImageSize().width());
        center.setY(center.y() * img.height() / img.fullImageSize().height());
    }
    return center;
}

double EnlargeShrink::getRadius(const QuillImage &img) const
{
    double radius = m_Radius;
    if (!img.isFragment() || (img.width() == 170 && img.height() == 170)) {
        if (img.fullImageSize().width() < img.fullImageSize().height()) {
            radius = radius * img.width() / img.fullImageSize().width();
        } else {
            radius = radius * img.height() / img.fullImageSize().height();
        }
    }
    return radius;
}

QuillImage TiltShift::apply(const QuillImage& image) const
{
    if (image.isNull()) {
        return image;
    }
    if (image.isFragment()) {
        m_gaussianFilter->setOption(QuillImageFilter::Radius, QVariant(GAUSSIAN_BLUR_RADIUS_TILE));
    } else if (image.size() == QSize(170, 170)) {
        m_gaussianFilter->setOption(QuillImageFilter::Radius, QVariant(GAUSSIAN_BLUR_RADIUS_THUMBNAIL));
    } else {
        m_gaussianFilter->setOption(QuillImageFilter::Radius, QVariant(GAUSSIAN_BLUR_RADIUS_PREVIEW));
    }
    QuillImage blurredImage = m_gaussianFilter->apply(image);

    float** mask = maskImage(image);
    QImage resultImage(image.size(), QImage::Format_RGB32);

    for (int y=0; y<image.height(); y++) {
        const QRgb* originalPixelRow = (const QRgb*)image.constScanLine(y);
        const QRgb* blurredPixelRow = (const QRgb*)blurredImage.constScanLine(y);
        QRgb* resultPixelRow = (QRgb*)resultImage.scanLine(y);

        for (int x=0; x<image.width(); x++) {
            int red = qRed(originalPixelRow[x]) * mask[x][y] + qRed(blurredPixelRow[x]) * (1 - mask[x][y]);
            int blue = qBlue(originalPixelRow[x]) * mask[x][y] + qBlue(blurredPixelRow[x]) * (1 - mask[x][y]);
            int green = qGreen(originalPixelRow[x]) * mask[x][y] + qGreen(blurredPixelRow[x]) * (1 - mask[x][y]);
            QColor result(red, green, blue);
            result.setHsvF(result.hueF(), qMin(SATURATION_FACTOR * result.saturationF(), 1.0), result.valueF());

            resultPixelRow[x] = result.rgb();
        }
    }

    for (int i = 0; i < image.size().width(); i ++) {
        delete[] mask[i];
    }

    delete[] mask;

    return QuillImage(image, resultImage);
}

QuillImage SaveFilter::saveJpeg(const QuillImage &image) const
{
    // For thumbnail saving, set save target size to the thumbnail size
    QSize targetSize = image.fullImageSize();
    if (!image.isFragment())
        targetSize = image.size();

    if (priv->serialSaver == 0)
        priv->serialSaver = new SerialSaver(priv->fileName,
                                            targetSize,
                                            priv->rawExifData);

    bool result = priv->serialSaver->process(image);

    priv->tileCount--;

    setFileModificationDateTime();

    if (result)
        return image;
    else
        return QuillImage();
}

QuillImage LoadFilter::apply(const QuillImage &tile) const
{
    if (priv->fileFormatQt.isEmpty() && !priv->isInvalid)
        const_cast<LoadFilter *>(this)->detectFormat();

    if (priv->isInvalid)
        return QuillImage();

    bool isNew = !reader
            || (filterAddress != this)
            || !priv->bufferInitialized
            || !tile.isFragment()
            || (priv->fileFormatQt != reader->format())
            || (!tile.targetSize().isEmpty()
            && (tile.targetSize() != tile.area().size()));

    filterAddress = const_cast<LoadFilter*>(this);
    priv->bufferInitialized = true;

    if (priv->iODevice) {
        delete reader;
        reader = new QImageReader(priv->iODevice, priv->fileFormatQt.toAscii());

        if (!priv->fileFormatQt.isEmpty())
            reader->setFormat(priv->fileFormatQt.toAscii());
    }
    else {
        if (isNew) {
            delete reader;
            reader = 0;

            if (!const_cast<LoadFilter*>(this)->readFileToByteArray())
                return QuillImage();

            buffer.seek(0);
            priv->orientation = readOrientation();
            reader = new QImageReader(&buffer, priv->fileFormatQt.toAscii());

            if (!priv->fileFormatQt.isEmpty())
                reader->setFormat(priv->fileFormatQt.toAscii());
        }
        else {
            buffer.seek(0);
        }
    }

    QuillImage input = tile;

    if (input.fullImageSize().isEmpty())
        input.setFullImageSize(reader->size());

    if (input.area().isEmpty())
        input.setArea(QRect(QPoint(0, 0), input.fullImageSize()));

    QImage newImage;

    QSize targetSize = input.targetSize();
    QSize fullImageSize = input.fullImageSize();

    QRect area = rotateArea(fullImageSize, input.area(), input);

    if ((priv->orientation == Exif_Orientation_Rotated90) ||
        (priv->orientation == Exif_Orientation_Rotated270)) {
        targetSize.transpose();
        fullImageSize.transpose();
    }

    /*
       Resetting reader for ScaledSize and ClipRect. This resetting
       will make sure that the reader will have all the options set
       correctly if the same reader has been used previously.
       Does not do the calculation in all cases since it is time consuming.
    */

    if (reader->scaledSize().isValid() || reader->clipRect().isValid()) {
        QSize readerSize = reader->size();
        reader->setScaledSize(readerSize);
        reader->setClipRect(QRect(QPoint(0,0),readerSize));
    }

    if (!input.isFragment()){
        fullImage = QImage();

        if (!targetSize.isEmpty()) {
            reader->setScaledSize(targetSize);
        }

        newImage = readFromReader();
    }
    else if (!targetSize.isEmpty() &&
             (targetSize != area.size())) {
        // Both cropping and scaling have been requested
        // Current implementation: ask plugin for the scaled image, then crop
        // This can be later optimized with a plugin that effectively
        // supports the ScaledClipRect option.
        reader->setScaledSize(QSize(targetSize.width() *
                                    fullImageSize.width() /
                                    area.width(),
                                    targetSize.height() *
                                    fullImageSize.height() /
//.........这里部分代码省略.........

QuillImage SaveFilter::apply(const QuillImage &image) const
{

    if(image.isNull())
        return QuillImage();
    // Simple format detection (1. given format 2. suffix)
    QString format = priv->fileFormatQt.toLatin1();
    if (format.isEmpty())
        format = QFileInfo(priv->fileName).suffix().toLatin1();

    // Jpeg always uses serial access saving, also for non-tiles,
    // to be able to insert EXIF data
    format = format.toLower();
    if ((format == "jpeg") || (format == "jpg"))
        return saveJpeg(image);

    // For non-tiles, just save
    if (!image.isFragment())
    {
        bool ok = saveFullImage(image);
        if (ok) {
            setFileModificationDateTime();
            return image;
        }
        else
            return QuillImage();
    }

    // First execute - prepare target

    if (priv->fullImageSize == QSize())
    {
            priv->fullImageSize = image.fullImageSize();

            priv->fullImage = QImage(priv->fullImageSize, QImage::Format_RGB32);
    }

    QPainter painter(&(priv->fullImage));
    painter.setCompositionMode(QPainter::CompositionMode_Source);

    painter.drawImage(image.area().topLeft(), image);

    priv->tileCount--;

    // Target full image has everything necessary, so do the final save.

    if (priv->tileCount == 0)
    {
        bool ok = saveFullImage(priv->fullImage);

        if (ok) {
            setFileModificationDateTime();
            // Return non-empty image to represent success
            return image;
        }
        else
            // Return empty image to represent failure
            return QuillImage();
    }
    else
        // No actual save was made, return non-empty image to represent success
        return image;
}