QT图形变换技巧

 /**
   水平翻转
   */
 void ImageViewer::horFilp()
 {
     image = image.mirrored(true, false);
     imageLabel->setPixmap(QPixmap::fromImage(image));
 }
 /**
   垂直翻转
   */
 void ImageViewer::verFilp()
 {
     image = image.mirrored(false, true);
     imageLabel->setPixmap(QPixmap::fromImage(image));
 }
 /**
   顺时针旋转
   */
 void ImageViewer::clockwise()
 {
     QMatrix matrix;
     matrix.rotate(90.0);
     image = image.transformed(matrix,Qt::FastTransformation);
     imageLabel->setPixmap(QPixmap::fromImage(image));
 }
 /**
   逆时针旋转
   */
 void ImageViewer::anticlockwise()
 {
     QMatrix matrix;
     matrix.rotate(-90.0);
     image = image.transformed(matrix,Qt::FastTransformation);
     imageLabel->setPixmap(QPixmap::fromImage(image));
 }

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