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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