Colorized the QPixmap

QPixmap originPixmap;

QPixmap colorizedPixmap = originPixmap;

QPainter painter(&colorizedPixmap);

painter.setCompositionMode(QPainter::CompositionMode_SourceIn);

painter.fillRect(colorizedPixmap.rect(), qRgb(0, 255, 0));

painter.end();

QLabel label;

label->setPixmap(colorizedPixmap);