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c++qtqmovie

How to rotate/transform QMovie in c++

I can rotate QPixmap with code like this

  QPixmap pix("img.jpg");
  QMatrix rm;
  rm.rotate(90);
  pix = pix.transformed(rm)

how can I do same with QMovie? Or somehow wrap it into some "container" and rotate that "container"?

Solution

  • You can try to rotate frame by frame. For example:

    m_movie = new QMovie(":/gif/tenor.gif");
connect(m_movie, SIGNAL(frameChanged(int)), this, SLOT(OnFrameChanged(int)));
ui->lblMovie->setMovie(m_movie);
m_movie->start();

    And rotate every frame when frame changed

    void MainWindow::OnFrameChanged(int /*frame*/)
{
    QPixmap pixmap = m_movie->currentPixmap();
    QMatrix rm;
    rm.rotate(90);
    pixmap = pixmap.transformed(rm);
    ui->lblMovRotated->setPixmap(pixmap);
}