Am 11.04.16 um 12:38 schrieb Ben Lau: > Hi, > > I am writing an image provider that read all the images to memory at > startup. And I found that the behaviour is different from 5.5.1 to 5.6 > in iOS. Seems that it is undocumented. I wonder is it an expected > behaviour or a bug? > > That is the example project: > https://github.com/benlau/quickcross/tree/master/tests/imageprovider > > That is the code of my image provider: > > QImageQCImageProvider::requestImage(constQString&id,QSize*size,constQSize&requestedSize) > { > Q_UNUSED(requestedSize); > QCImageLoader*loader=QCImageLoader::instance(); > QImageresult; > if(loader->contains(id)){ > result=loader->image(id); > *size=result.size(); > } > returnresult; > } > Code to display image: > Image { > id: image > source: "image://arts/Lenna.png" // An 512x512 image > } > In Qt 5.5.1 with iPhone6, the property of image will be set to: > width: 512 > height: 512 > sourceSize: Qt.size(512,512) > However, in Qt 5.6 with iPhone6, it becomes: > width: 170.66666 > height: 170.66666 > sourceSize: Qt.size(512,512) > The display size of image is different. > > now from Qt 5.6 HighDPI is supported for all platforms. iPhone has scaling factor 3
170.66666 * 3 = 512 ekke
_______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
