Am 11.04.16 um 14:07 schrieb Ben Lau: > > On 11 April 2016 at 19:59, ekke <e...@ekkes-corner.org > <mailto:e...@ekkes-corner.org>> wrote: > > 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,c >> onstQSize&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 > > > But Qt 5.5 on iOS also support HighDPI. Their result are different. > > have you tried to explicitely set
QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling); ekke
_______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
