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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