C++ QuillImage::setArea方法代码示例

void ut_load::testLoadSameFilterTwice()
{
    QTemporaryFile testFile;
    testFile.open();
    QImage greenTestImage("/usr/share/quillimagefilter-tests/images/854x480_blue.png");
    // Verify whether image exists
    QVERIFY(!greenTestImage.isNull());
    greenTestImage.save(testFile.fileName(), "jpg");

    QuillImage target = QuillImage();
    target.setFullImageSize(QSize(854, 480));
    target.setArea(QRect(0, 0, 854, 480));

    QuillImage target2 = QuillImage();
    target2.setFullImageSize(QSize(854, 480));
    target2.setArea(QRect(0, 0, 854, 480));

    QuillImageFilter *filter =
        QuillImageFilterFactory::createImageFilter("org.maemo.load");

    filter->setOption(QuillImageFilter::FileName, testFile.fileName());

    // Passing JPEG through the filter
    QuillImage imageAfter = filter->apply(target);

    // Passing JPEG through the filter
    QuillImage imageAfter2 = filter->apply(target2);

    // Checking the red channel value which should be always bigger than that of greeen channel
    QVERIFY( qBlue(imageAfter.pixel(QPoint(0, 0))) > qGreen(imageAfter.pixel(QPoint(0, 0))) );
    // Checking the red channel value which should be always bigger than that of greeen channel
    QVERIFY( qBlue(imageAfter2.pixel(QPoint(0, 0))) > qGreen(imageAfter2.pixel(QPoint(0, 0))) );
    delete filter;
}

void ut_scale::testScalePreview()
{
    // No changes must be made to a preview image

    QuillImageFilter *filter =
        QuillImageFilterFactory::createImageFilter("org.maemo.scale");

    QVERIFY(filter);

    QVERIFY(filter->setOption(QuillImageFilter::SizeAfter, QSize(4, 1)));

    QuillImage image = Unittests::generatePaletteImage();
    QCOMPARE(image.size(), QSize(8, 2));

    image.setFullImageSize(QSize(16, 4));
    image.setArea(QRect(0, 0, 16, 4));

    QuillImage image2 = filter->apply(image);

    QCOMPARE(image2.size(), QSize(8, 2));
    QCOMPARE(image2.fullImageSize(), QSize(4, 1));
    QCOMPARE(image2.area(), QRect(0, 0, 4, 1));

    QVERIFY(Unittests::compareImage(image, image2));

    delete filter;
}

void ut_load::testCropping()
{
    QuillImageFilter *filter =
        QuillImageFilterFactory::createImageFilter("org.maemo.load");

    QFile file("/usr/share/quillimagefilter-tests/images/16_color_palette.png");
    filter->setOption(QuillImageFilter::FileName, QString(file.fileName()));

    QuillImage target = QuillImage();
    target.setTargetSize(QSize(1, 1));
    target.setFullImageSize(QSize(8, 2));
    target.setArea(QRect(2, 0, 2, 2));

    QuillImage result = filter->apply(target);
    QCOMPARE(result.size(), QSize(1, 1));
    // Expect an average of the given area (png = smooth scaling).
    QCOMPARE(qRed(result.pixel(QPoint(0,0))), 96);
    QCOMPARE(qGreen(result.pixel(QPoint(0,0))), 193);
    QCOMPARE(qBlue(result.pixel(QPoint(0,0))), 0);

    delete filter;
}

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.........