C++ QuillImage::area方法代码示例

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.........

void ut_tileloading::testQuill()
{
    QFile testFile("/usr/share/libquill-tests/images/image_16x4.jpg");

    QImage referenceImage("/usr/share/libquill-tests/images/image_16x4.png");
    Quill::setDefaultTileSize(QSize(2, 2));

    QuillFile *file =
        new QuillFile(testFile.fileName());

    file->setViewPort(QRect(-8, -2, 16, 4));

    file->setDisplayLevel(1);

    Quill::releaseAndWait(); // preview

    QCOMPARE(file->allImageLevels().count(), 1);

    QuillImage previewImage = file->allImageLevels().at(0);

    QCOMPARE(previewImage.size(), QSize(4, 1));
    QCOMPARE(previewImage.fullImageSize(), QSize(16, 4));

    Quill::releaseAndWait();

    QCOMPARE(file->allImageLevels().count(), 2);
    QuillImage fragment = file->allImageLevels().at(1);

    QCOMPARE(fragment.size(), QSize(2, 2));
    QCOMPARE(fragment.fullImageSize(), QSize(16, 4));
    QCOMPARE(fragment.area(), QRect(0, 0, 2, 2));
 
    Quill::releaseAndWait();

    QCOMPARE(file->allImageLevels().count(), 3);
    fragment = file->allImageLevels().at(2);

    QCOMPARE(fragment.size(), QSize(2, 2));
    QCOMPARE(fragment.fullImageSize(), QSize(16, 4));
    QCOMPARE(fragment.area(), QRect(2, 0, 2, 2));
    test_utils::analyze((QImage)fragment, referenceImage.copy(2, 0, 2, 2), 13);

    Quill::releaseAndWait();

    QCOMPARE(file->allImageLevels().count(), 4);
    fragment = file->allImageLevels().at(3);

    QCOMPARE(fragment.size(), QSize(2, 2));
    QCOMPARE(fragment.fullImageSize(), QSize(16, 4));
    QCOMPARE(fragment.area(), QRect(4, 0, 2, 2));
    test_utils::analyze((QImage)fragment, referenceImage.copy(4, 0, 2, 2), 13);

    Quill::releaseAndWait();

    QCOMPARE(file->allImageLevels().count(), 5);
    fragment = file->allImageLevels().at(4);

    QCOMPARE(fragment.size(), QSize(2, 2));
    QCOMPARE(fragment.fullImageSize(), QSize(16, 4));
    QCOMPARE(fragment.area(), QRect(6, 0, 2, 2));
    test_utils::analyze((QImage)fragment, referenceImage.copy(6, 0, 2, 2), 13);

    delete file;
}

void ut_tileloading::testMultiOperation()
{
    QTemporaryFile tempFile;
    tempFile.open();

    // The original file may be write protected and edits are disabled for
    // such files so we need to make a copy
    QImage originalImage("/usr/share/libquill-tests/images/image_16x4.png");
    originalImage.save(tempFile.fileName(), "jpg");
    Quill::setDefaultTileSize(QSize(2, 2));

    QuillFile *file =
        new QuillFile(tempFile.fileName(), Strings::jpg);

    file->setViewPort(QRect(-8, -2, 16, 4));
    file->setDisplayLevel(1);

    QuillImageFilter *filter =
        QuillImageFilterFactory::createImageFilter(QuillImageFilter::Name_BrightnessContrast);
    filter->setOption(QuillImageFilter::Brightness,
                      QVariant(20));

    QImage referenceImage = filter->apply(originalImage);

    file->runFilter(filter);
    Quill::releaseAndWait(); // preview load
    Quill::releaseAndWait(); // preview filter

    QCOMPARE(file->allImageLevels().count(), 1);

    QuillImage previewImage = file->allImageLevels().at(0);

    QCOMPARE(previewImage.size(), QSize(4, 1));
    QCOMPARE(previewImage.fullImageSize(), QSize(16, 4));

    Quill::releaseAndWait();
    QCOMPARE(file->allImageLevels().count(), 1);

    Quill::releaseAndWait();
    QCOMPARE(file->allImageLevels().count(), 2);
    QuillImage fragment = file->allImageLevels().at(1);

    QCOMPARE(fragment.size(), QSize(2, 2));
    QCOMPARE(fragment.fullImageSize(), QSize(16, 4));
    QCOMPARE(fragment.area(), QRect(0, 0, 2, 2));

    Quill::releaseAndWait();
    QCOMPARE(file->allImageLevels().count(), 2);

    Quill::releaseAndWait();
    QCOMPARE(file->allImageLevels().count(), 3);
    fragment = file->allImageLevels().at(2);

    QCOMPARE(fragment.size(), QSize(2, 2));
    QCOMPARE(fragment.fullImageSize(), QSize(16, 4));
    QCOMPARE(fragment.area(), QRect(2, 0, 2, 2));
    test_utils::analyze((QImage)fragment, referenceImage.copy(2, 0, 2, 2),13);

    Quill::releaseAndWait();
    QCOMPARE(file->allImageLevels().count(), 3);

    Quill::releaseAndWait();
    QCOMPARE(file->allImageLevels().count(), 4);
    fragment = file->allImageLevels().at(3);

    QCOMPARE(fragment.size(), QSize(2, 2));
    QCOMPARE(fragment.fullImageSize(), QSize(16, 4));
    QCOMPARE(fragment.area(), QRect(4, 0, 2, 2));
    test_utils::analyze((QImage)fragment, referenceImage.copy(4, 0, 2, 2),13);

    Quill::releaseAndWait();
    QCOMPARE(file->allImageLevels().count(), 4);

    Quill::releaseAndWait();
    QCOMPARE(file->allImageLevels().count(), 5);
    fragment = file->allImageLevels().at(4);

    QCOMPARE(fragment.size(), QSize(2, 2));
    QCOMPARE(fragment.fullImageSize(), QSize(16, 4));
    QCOMPARE(fragment.area(), QRect(6, 0, 2, 2));
    test_utils::analyze((QImage)fragment, referenceImage.copy(6, 0, 2, 2),13);

    delete file;
}

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;
}