C++ (Cpp) QVolatileImage::isNull 예제들

예제 #1

void tst_QVolatileImage::create()
{
    QVolatileImage nullImg;
    QVERIFY(nullImg.isNull());

    QVolatileImage img(100, 200, QImage::Format_ARGB32);
    QVERIFY(!img.isNull());
    QCOMPARE(img.width(), 100);
    QCOMPARE(img.height(), 200);
    QCOMPARE(img.format(), QImage::Format_ARGB32);
    QCOMPARE(img.byteCount(), img.bytesPerLine() * img.height());
    QCOMPARE(img.hasAlphaChannel(), true);
    QCOMPARE(img.depth(), 32);

    QImage source(12, 23, QImage::Format_ARGB32_Premultiplied);
    img = QVolatileImage(source);
    QVERIFY(!img.isNull());
    QCOMPARE(img.width(), 12);
    QCOMPARE(img.height(), 23);
    QCOMPARE(img.format(), source.format());
    QCOMPARE(img.byteCount(), img.bytesPerLine() * img.height());
    QVERIFY(img.imageRef() == source);
    QVERIFY(img.toImage() == source);
    QCOMPARE(img.hasAlphaChannel(), true);
    QCOMPARE(img.hasAlphaChannel(), img.imageRef().hasAlphaChannel());
    QCOMPARE(img.hasAlphaChannel(), img.toImage().hasAlphaChannel());
    QCOMPARE(img.depth(), 32);
}

예제 #2

파일: qvolatileimage.cpp 프로젝트: TriggeredMessaging/phantomjs

void QVolatileImagePaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
{
#ifdef Q_OS_SYMBIAN
    QVolatileImage img = pm.pixmapData()->toVolatileImage();
    if (!img.isNull()) {
        img.beginDataAccess();
        QRasterPaintEngine::drawImage(r, img.constImageRef(), sr);
        img.endDataAccess(true);
    } else {
        QRasterPaintEngine::drawPixmap(r, pm, sr);
    }
#else
    QRasterPaintEngine::drawPixmap(r, pm, sr);
#endif
}

예제 #3

파일: qvolatileimage.cpp 프로젝트: TriggeredMessaging/phantomjs

void QVolatileImagePaintEngine::drawPixmap(const QPointF &p, const QPixmap &pm)
{
#ifdef Q_OS_SYMBIAN
    QVolatileImage img = pm.pixmapData()->toVolatileImage();
    if (!img.isNull()) {
        img.beginDataAccess();
        // imageRef() would detach and since we received the QVolatileImage from
        // toVolatileImage() by value, it would cause a copy which would ruin
        // our goal. So use constImageRef() instead.
        QRasterPaintEngine::drawImage(p, img.constImageRef());
        img.endDataAccess(true);
    } else {
        QRasterPaintEngine::drawPixmap(p, pm);
    }
#else
    QRasterPaintEngine::drawPixmap(p, pm);
#endif
}

예제 #4

파일: tst_qvolatileimage.cpp 프로젝트: maxxant/qt

void tst_QVolatileImage::create()
{
    QVolatileImage nullImg;
    QVERIFY(nullImg.isNull());

    QVolatileImage img(100, 200, QImage::Format_ARGB32);
    QVERIFY(!img.isNull());
    QCOMPARE(img.width(), 100);
    QCOMPARE(img.height(), 200);
    QCOMPARE(img.format(), QImage::Format_ARGB32);
    QCOMPARE(img.byteCount(), img.bytesPerLine() * img.height());
    QCOMPARE(img.hasAlphaChannel(), true);
    QCOMPARE(img.depth(), 32);

    QImage source(12, 23, QImage::Format_ARGB32_Premultiplied);
    img = QVolatileImage(source);
    QVERIFY(!img.isNull());
    QCOMPARE(img.width(), 12);
    QCOMPARE(img.height(), 23);
    QCOMPARE(img.format(), source.format());
    QCOMPARE(img.byteCount(), img.bytesPerLine() * img.height());
    QVERIFY(img.imageRef() == source);
    QVERIFY(img.toImage() == source);
    QCOMPARE(img.hasAlphaChannel(), true);
    QCOMPARE(img.hasAlphaChannel(), img.imageRef().hasAlphaChannel());
    QCOMPARE(img.hasAlphaChannel(), img.toImage().hasAlphaChannel());
    QCOMPARE(img.depth(), 32);

#ifdef Q_OS_SYMBIAN
    CFbsBitmap *bmp = new CFbsBitmap;
    QVERIFY(bmp->Create(TSize(100, 50), EColor16MAP) == KErrNone);
    QVolatileImage bmpimg(bmp);
    QVERIFY(!bmpimg.isNull());
    QCOMPARE(bmpimg.width(), 100);
    QCOMPARE(bmpimg.height(), 50);
    // Verify that we only did handle duplication, not pixel data copying.
    QCOMPARE(bmpimg.constBits(), (const uchar *) bmp->DataAddress());
    delete bmp;
    // Check if content is still valid.
    QImage copyimg = bmpimg.toImage();
    QCOMPARE(copyimg.format(), QImage::Format_ARGB32_Premultiplied);
#endif
}