qt irregular label, pushbutton

//QPixmap pixmap(":/new/prefix_image/LDH_R.png");
//ui->label_LDH_B->setPixmap(pixmap);
//ui->label_LDH_B->setMask(pixmap.mask());

// QPixmap pixmapLeft(":/new/direction16/image/LUH_B.png");
// ui->pushButton_LUH->setStyleSheet(“border-image: url(:/new/direction16/image/LUH_B.png);”);
// ui->pushButton_LUH->setMask(pixmapLeft.mask());

Note: The image background should be transparent