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| author | Friedemann Kleint <Friedemann.Kleint@digia.com> | 2014-08-26 09:23:43 +0200 |
|---|---|---|
| committer | Friedemann Kleint <Friedemann.Kleint@digia.com> | 2014-08-26 16:59:36 +0200 |
| commit | f85f3acd7878f49f0878644905ca27ceb7bc0775 (patch) | |
| tree | cd193a95ea5c9ef35b1570cc7fc163b0cc8d38c5 /src/gui/image/qimage.cpp | |
| parent | 4017605d56f5e7769c6aa7954a285563c06646ad (diff) | |
Document loading of high resolution versions of images.
Task-number: QTBUG-38858
Change-Id: I87ee18b66e137f5f5c01d77910f1a7f256b85e18
Reviewed-by: Alessandro Portale <alessandro.portale@digia.com>
Diffstat (limited to 'src/gui/image/qimage.cpp')
| -rw-r--r-- | src/gui/image/qimage.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp index 16696f611d..c3b4b1444a 100644 --- a/src/gui/image/qimage.cpp +++ b/src/gui/image/qimage.cpp @@ -1391,14 +1391,14 @@ QVector<QRgb> QImage::colorTable() const /*! Returns the device pixel ratio for the image. This is the - ratio between image pixels and device-independent pixels. + ratio between \e{device pixels} and \e{device independent pixels}. Use this function when calculating layout geometry based on the image size: QSize layoutSize = image.size() / image.devicePixelRatio() The default value is 1.0. - \sa setDevicePixelRatio() + \sa setDevicePixelRatio(), QImageReader */ qreal QImage::devicePixelRatio() const { @@ -1423,7 +1423,8 @@ qreal QImage::devicePixelRatio() const image size will take the ratio into account: QSize layoutSize = image.size() / image.devicePixelRatio() The net effect of this is that the image is displayed as - high-dpi image rather than a large image. + high-DPI image rather than a large image + (see \l{Drawing High Resolution Versions of Pixmaps and Images}). \sa devicePixelRatio() */ |