diff options
Diffstat (limited to 'src/widgets/widgets/qlabel.cpp')
| -rw-r--r-- | src/widgets/widgets/qlabel.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/widgets/widgets/qlabel.cpp b/src/widgets/widgets/qlabel.cpp index 3e06360920..4d1c4ebb74 100644 --- a/src/widgets/widgets/qlabel.cpp +++ b/src/widgets/widgets/qlabel.cpp @@ -1091,8 +1091,10 @@ void QLabel::paintEvent(QPaintEvent *) #endif if (d->pixmap && !d->pixmap->isNull()) { QPixmap pix; - if (d->scaledcontents) { - QSize scaledSize = cr.size() * devicePixelRatio(); + const qreal dpr = devicePixelRatio(); + if (d->scaledcontents || dpr != d->pixmap->devicePixelRatio()) { + QSize scaledSize = d->scaledcontents ? (cr.size() * dpr) + : (d->pixmap->size() * (dpr / d->pixmap->devicePixelRatio())); if (!d->scaledpixmap || d->scaledpixmap->size() != scaledSize) { if (!d->cachedimage) d->cachedimage = d->pixmap->toImage(); @@ -1101,7 +1103,7 @@ void QLabel::paintEvent(QPaintEvent *) d->cachedimage->scaled(scaledSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation); d->scaledpixmap = QPixmap::fromImage(std::move(scaledImage)); - d->scaledpixmap->setDevicePixelRatio(devicePixelRatio()); + d->scaledpixmap->setDevicePixelRatio(dpr); } pix = *d->scaledpixmap; } else |