加载图像函数在qt快速源代码

Question

In qtQuick Source.函数 loadImage 中有一行代码：

QQuickPixmap* pix = new QQuickPixmap();

如果我在画布上尽可能多地调用此函数。操作系统分配给此应用程序的内存将被填满，这将导致图片失败。我想问一下这个源代码是否有任何问题？

void QQuickCanvasItem::loadImage(const QUrl& url)
{
    Q_D(QQuickCanvasItem);
    QUrl fullPathUrl = d->baseUrl.resolved(url);
    if (!d->pixmaps.contains(fullPathUrl)) {
        QQuickPixmap* pix = new QQuickPixmap();
        QQmlRefPointer<QQuickCanvasPixmap> canvasPix;
        canvasPix.adopt(new QQuickCanvasPixmap(pix));
        d->pixmaps.insert(fullPathUrl, canvasPix);
        pix->load(qmlEngine(this)
                , fullPathUrl
                , QQuickPixmap::Cache | QQuickPixmap::Asynchronous);
        if (pix->isLoading())
            pix->connectFinished(this, SIGNAL(imageLoaded()));
    }
}

Answer 1

void QQuickCanvasItem::loadImage(const QUrl& url)
{
    Q_D(QQuickCanvasItem);
    QUrl fullPathUrl = d->baseUrl.resolved(url);
    if (!d->pixmaps.contains(fullPathUrl)) {
        QQuickPixmap* pix = new QQuickPixmap();
        QQmlRefPointer<QQuickCanvasPixmap> canvasPix;
        canvasPix.adopt(new QQuickCanvasPixmap(pix));
        d->pixmaps.insert(fullPathUrl, canvasPix);
        pix->load(qmlEngine(this)
                , fullPathUrl
                , QQuickPixmap::Cache | QQuickPixmap::Asynchronous);
        if (pix->isLoading())
            pix->connectFinished(this, SIGNAL(imageLoaded()));
    }
}