There are plenty of non-Qt stuff about this, for instance: http://stackoverflow.com/questions/10078444/xcode-coordinates-for-ipad-retina-displays
2014-02-11 22:54 GMT+01:00 Etienne Sandré-Chardonnal <etienne.san...@m4x.org >: > In fact, by default iOs apps are run in a compatibility mode with the > lower non-retina resolution. The device, though, draws fonts and primitives > in high res, but the app has a 1024x768 logical screen. > There is a native high res mode where you directly adress the 2048x1536 > pixels, but it requires to be switched on. I do not know if it's available > in QtQuick, but I would guess it's not. > > Cheers, > > Etienne > > > 2014-02-11 22:49 GMT+01:00 VStevenP <vstevenpa...@yahoo.com>: > > Hi Etienne, >> >> That makes good sense to me. I did not try drawing such an image in such >> a rectangle, but I will try. >> >> - VStevenP >> >> ------------------------------ >> *From:* Etienne Sandré-Chardonnal <etienne.san...@m4x.org> >> *To:* VStevenP <vstevenpa...@yahoo.com> >> *Sent:* Tuesday, February 11, 2014 4:41 PM >> *Subject:* Re: [Interest] iPad mini Retina 2048 x 1536 display >> resolution issue with QtQuick apps >> >> Hi, I believe that Retina displays, for compatibility with non-retina, >> expose the same screen resolution (1024x768). This means that every >> adressing of pixel coordinates should be made in that resolution. The >> double resolution is only used internally by the device for rendering >> fonts, textures, etc... This way, you write the exact same UI for newer and >> older devices. >> >> Did you try drawing a 2048x1536 images in a 1024x768 top-level rectangle? >> >> Cheers, >> >> Etienne >> >> >> 2014-02-11 22:28 GMT+01:00 VStevenP <vstevenpa...@yahoo.com>: >> >> I just got an iPad mini retina 2048 x 1536 for developing QtQuick apps. >> >> If I set the width and height of my top-level QML Rectangle to 2048 x >> 1536, it overflows the screen by 2x in each dimension. So it's seems like >> there's a mistaken doubling of pixel dimensions for rendering for this iPad >> model. >> >> I tested this iPad with its built-in Safari to see that some larger >> google images were rendering at the proper pixel dimensions, and they are >> rendering correctly. 2048 x 1536 images were not overflowing the display >> at 2x. >> >> Any one else observe this? I didn't see it in JIRA. I will enter a bug >> if that's the right thing to do. Maybe Qt5 needs to do something special >> to address the iPad mini Retina as 2048x 1536. >> >> - VStevenP >> _______________________________________________ >> Interest mailing list >> Interest@qt-project.org >> http://lists.qt-project.org/mailman/listinfo/interest >> >> >> >> >> >
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