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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/qimagereader.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/qimagereader.cpp')
| -rw-r--r-- | src/gui/image/qimagereader.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/gui/image/qimagereader.cpp b/src/gui/image/qimagereader.cpp index 3c75202766..3bf002373c 100644 --- a/src/gui/image/qimagereader.cpp +++ b/src/gui/image/qimagereader.cpp @@ -74,6 +74,8 @@ that occurred, or errorString() to get a human readable description of what went wrong. + \section1 Formats + Call supportedImageFormats() for a list of formats that QImageReader can read. QImageReader supports all built-in image formats, in addition to any image format plugins that support @@ -85,7 +87,19 @@ stream contents. You can enable or disable this feature, by calling setAutoDetectImageFormat(). + \section1 High Resolution Versions of Images + + It is possible to provide high resolution versions of images should a scaling + between \e{device pixels} and \e{device independent pixels} be in effect. + + The high resolution version is marked by the suffix \c @2x on the base name. + The image read will have its \e{device pixel ratio} set to a value of 2. + + This can be disabled by setting the environment variable + \c QT_HIGHDPI_DISABLE_2X_IMAGE_LOADING. + \sa QImageWriter, QImageIOHandler, QImageIOPlugin, QMimeDatabase + \sa QImage::devicePixelRatio(), QPixmap::devicePixelRatio(), QIcon, QPainter::drawPixmap(), QPainter::drawImage(), Qt::AA_UseHighDpiPixmaps */ /*! |