Qt6 VideoOutput mapRectToSource

[bunjee207]

The Qt5 VideoOutput implementation has a convenient mapRectToSource function provided by the QML API.

With the Qt6 version it seems to be gone, is it accessible somewhere else ?

[bunjee207]

Here is a simple solution without the rotation support:

/* Q_INVOKABLE static */ QPoint WFilterBarcode::mapPointToSource(const QRect  & source,
                                                                 const QRect  & content,
                                                                 const QPoint & point)
{
    qreal x = (qreal) (point.x() - content.left()) / content.width ();
    qreal y = (qreal) (point.y() - content.top ()) / content.height();

    return QPoint(x * source.width(), y * source.height());
}

/* Q_INVOKABLE static */ QRect WFilterBarcode::mapRectToSource(const QRect & source,
                                                               const QRect & content,
                                                               const QRect & target)
{
    return QRect(mapPointToSource(source, content, target.topLeft    ()),
                 mapPointToSource(source, content, target.bottomRight()));
}